Protection system for lifting crane (versions)

FIELD: transportation.

SUBSTANCE: crane protection system contains working conditions transmitters, actuator and data-control unit made on the base of microcontroller with possibility of wire or wireless connecting to it above mentioned transmitters and actuator and with possibility for actuator to generate control signals aimed to prevent working conditions to exceed their permitted values. In the system parameter is revealed for which permitted value exceeding is the most probable at current time, whereupon priority limiting of this parameter value. To do so, the main load carrying member of crane is determined or inhibition of it's stability under working conditions margin is revealed. In the second version of protection system, warning, detection and/or correction of operator wrong actions during setting parameters for jib equipment and/or support contour is performed. In the third system version, changing of permitted values for crane operation parameters is provisioned depending on error of used transmitters.

EFFECT: improvement of operation safety for lifting crane; reducing the value of its travels after achieving the rating value for any parameter and blocking the crane movements by protection system; increase of this system reliability and reduction of requirement to transmitters accuracy.

25 cl, 1 dwg

 

The invention relates to hoisting and transport machinery and can be used in control systems and protection of cranes from congestion and collisions with various obstacles.

Known protection system of hoisting crane, containing an electronic unit that includes a digital computing machine and connected to the controls, indicators, memory block and the device I / o information, and sensors operating parameters (angle of elevation of the boom, the boom length, weight, angle of rotation of the rotary platform of the crane and so on)connected to the inputs of the input-output information, the outputs of which are connected to the Executive unit [1].

In this system, the failure of any sensor or operator error when typing in a digital computing machine parameters and modes of operation of the crane (sliding bearings, the degree of hoist winch part of the polyspast, availability, length and angle of inclination of the jib and so on) lead to the uncontrolled disconnection of the protective functions of the system, which reduces the safe operation of the crane.

Closest to the proposed system is a system protection valve overload and from collisions with obstacles, containing sensors parameters of its work, the Executive unit and information-management unit implemented on the basis of microcontrolle the a and connected with the mentioned sensors and actuators. This block contains the controls and made with the possibility of entering into it by the operator parameters of the boom system and the basic contour of the crane. Within the system are calculate the coordinates of the elements and subassemblies of the crane relative to the edges of its working area, loads of them and stock cargo stability of the crane, the comparison of calculated values with valid values recorded in the memory information control unit. Depending on the results of these comparisons are control signals actuating device aimed at the prevention of excess of these valid values. With the calculation of loads and cargo are two methods using two groups of load sensors and/or the spatial position of the boom of the crane [2].

In this system there is a successive comparison of different parameters of the crane with their maximum permissible values without pre-selecting the option, the excess of which is most likely at the current time. This leads to slow protection operation and thus to reduce the safety of the crane. In addition, this system does not provide the detection, prevention and elimination of operator error when typing in the security settings on the boom is equipped with the I and/or the basic contour of the crane, which also leads to the insecurity of his work. This lack of leads and lack of correction values limit values of the operating parameters of the crane depending on the errors of the sensors used in this system.

In addition, reduced system performance protection leads to increased displacements of structural elements of the crane (Viagem) after reaching the limit values of the operating parameters of the crane. This, in turn, hampers the coordinate protection of the crane.

The increased number of sensors in the system, due to the use of different methods to determine the same parameter crane work, leads to a reduction in the reliability of the protection system due to its complexity.

The main technical problem which the claimed invention is directed, is to improve the safety of crane due to:

- improve the performance of the protection system;

- prevention or elimination of operator error when you enter into the system settings on the boom system and/or the basic contour of the valve;

- eliminate the influence on the performance of the protection system errors of the sensors, engaged in direct or indirect measurement of the crane.

Additional technical objectives are:

- smart is the solution of the movements of the crane after reaching the limit values of the operating parameters of the valve and blocking protection system of his movements by improving the performance of the protection system;

- improving the reliability of the protection system through the implementation of its functions with a smaller number of sensors used without compromising the security of the crane;

- simplification of the structure of the input device by the operator of the parameters of the boom system and the basic contour of the lifting crane;

- reducing the requirements to the accuracy of the sensors operating parameters of the crane without compromising the security of its work;

- increasing the productivity of the crane due to the use of reserves its carrying capacity when using sensors high precision.

A technical problem solved by the fact that in the protection system, crane, containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or wireless connection to him the above-mentioned sensors and actuators and computing coordinates of elements and/or assemblies relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane, the subsequent comparison of at least one of the calculated values of these parameters with valid values recorded in the memory information control block is a, and forming, depending on the results of these comparisons, control signals actuating device aimed at blocking the movements of the crane of conditions prevent exceeding those allowable values and the resolution of the remaining movements of the crane, the information control unit is additionally configured to identify the parameter exceeding the permissible value which is most likely for the current spatial position and/or current operating conditions of the load-lifting crane, and the priority of the comparison of this parameter with its valid value.

Identification of parameter exceeded the valid values which most likely is carried out mainly with the use of a mathematical model of the crane, in particular, by identifying the most loaded of the power element or Assembly, or lower stock cargo stability of the crane, or the detection element or Assembly of the crane is approaching the obstacle at the shortest distance. This takes into account the current spatial position, working conditions, the configuration of the lifting equipment, the position of the supports of the crane, the current value of the velocity of the lift/lower and/or movement of cargo and/or climatic parameters EXT is her environment, in particular, its temperature, wind speed and precipitation.

In the second version of the system of protection of hoisting crane, containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or wireless connection to him the above-mentioned sensors and actuators and computing coordinates of elements and/or assemblies relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane within the parameters of the boom system and/or the reference circuit crane, comparison, at least one of the calculated values of these parameters with valid values recorded in the memory information control unit, and forming, depending on the results of these comparisons, control signals actuating device designed to prevent exceeding these limits, the technical problem solved by the fact that the information-control unit is additionally configured to automatically determine the parameters of the boom system and/or the reference contour lifting crane or warnings, and/or the neck is ing, and/or correction of incorrect operator actions when you enter these parameters with the possibility of the formation of the warning information signals and/or control signals actuating device aimed at eliminating the consequences of their wrong actions.

For this purpose, in particular, the information-managing unit configured to output information indicators input parameters boom system and/or the reference circuit and generating control signals actuating device permitting operation of the crane, after the operator confirms the correctness of their input.

Problem solving in this embodiment, the system can be achieved also by the fact that the information-managing unit is configured to automatically detect incorrectly entered by the operator parameters boom system and/or the reference path by analyzing changes in the operating parameters of the crane, characterizing the load and/or the spatial position of its elements and/or assemblies. In particular, the possible ways to identify incorrectly entered by the operator multiplicity of hoist winch part of the variable geometry mechanism can be implemented by:

matching the speed of movement of the hook clamps or lifting/lowering of the load and speed of movement of cargo is on the rope or the angular velocity of the drum cargo winches or by comparing the values of the weight lifted/moved, calculated on the basis of the results of measuring forces in the cargo rope and effort in strelba rope or pressure in the lift cylinder boom;

- mapping the measured values of weight lifted/moved and output power of the drive cargo winches determined by measuring the rate of movement of the hoist rope or angular velocity of the drum cargo winches and torque transmitted by the shaft of the cargo winch, or the amount of pressure in its hydraulic actuator, and the subsequent multiplication of these values;

- control the operation of the crane with the entered value of this ratio for a given length of the boom, in particular with the operator parameter indicative of the jib.

In any of the above options definition incorrectly entered by the operator multiplicity of hoist winch part of the polyspast information-management unit can be configured to automatically correcting incorrectly entered the ratio of the hoist winch part of the polyspast. In particular, when the operator parameter indicative of the jib is automatically set to a single value of the ratio of the hoist winch part of the polyspast.

Information-management unit can be performed also with the ability to automatically identify the misspelled operators of the ω parameter is characteristic of the presence of the jib (boom extender), for example, by comparison of:

- change the angle or length of the boom and the associated changes in load moment of the crane;

- the calculated load moment and the moment of inertia of the turntable of the crane with the load, determined using measurements of accelerations and/or effort or moments in the drive rotation of the crane.

Problem solving can also be achieved by the implementation of information-management unit with the ability to automatically identify incorrectly entered by the operator parameters of the reference circuit and/or the boom system (part of the length of the boom/departure, for example, installation of the jib), in particular by identifying inconsistencies values of freight time, calculated using the measurement results of the effort or pressure in the mechanisms of outriggers and mechanism arrows.

In the third embodiment, the protection system crane containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or wireless connection to him the above-mentioned sensors and actuators and computing coordinates of elements and/or Assembly Oslo is relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane, comparing at least one of the calculated values of these parameters with valid values recorded in the memory information control unit, and forming, depending on the results of these comparisons, control signals actuating device designed to prevent exceeding these limits, the problem solving is achieved by the fact that the information-control unit is additionally configured to change the allowed values of the parameters depending on the error mentioned sensors. In particular, the automatic reduction of the allowable load values and/or increasing the permissible value of the cargo stability of the crane when increasing the error of the load sensors and/or the spatial position of the elements and/or assemblies of the lifting crane. This may be a priori established and recorded in the memory information control unit the value of the maximum error of the sensors at different values of ambient temperature.

In any case the proposed protection systems for solving tasks, at least part of the load sensors and/or the spatial position can be combined into one group moved to their location on the crane and provided with a controller, made with the possibility of conversion and/or processing output signals of these sensors and their wired or wireless transmission in the information-managing unit. This unit may further comprise a built-in device readout/alarm, and/or the Registrar of parameters, and/or storage device, and can also be configured to connect to at least one of these devices.

Moreover, in any version of the proposed protection system of information control unit can be performed with the possibility of detecting and memorizing the prehistory of the approximation parameter to its allowable value, and generate control signals actuating device, designed to block or allow various movements of the crane, taking into account this background.

Implementation of system protection with these distinctive features of independent claims allows you to:

- to identify the parameter of operation of the crane, exceeding the permissible value which is most likely at the current time, with subsequent priority limit value (for this purpose, is determined by the pre-loaded force element or Assembly of the crane or detected decreasing its cargo sustainability);

- implement already active the tion, detection and/or correction of incorrect operator actions when entering parameters boom system and/or the reference contour lifting crane;

- to adjust the value of allowable values of the operating parameters of the crane depending on the error sensors, engaged in direct or indirect measurements of these parameters.

This ensures a level of safety crane, reducing the value of his movements after reaching the maximum allowable value of any parameter and blocking movements of the crane protection system, improving the reliability of the protection system and reduced requirements to the accuracy of the sensors or increase productivity of the crane due to the use of reserves its carrying capacity when using sensors high accuracy. Therefore, these distinctive signs are in direct causal connection with the decision of both the main and additional technical tasks.

On the drawing as an example of one possible functional diagrams of the system of protection of the crane.

The system, which may be cited as a device or a protection device or security, contains information managing unit 1, is made on the basis of the microcontroller 2, and connected to this unit using a wire is or wireless interface sensors 3 load and/or the spatial position of the elements and/or assemblies of the valve and the actuator 4.

In the information-control unit 1, which may be cited as well as the data processing unit, a display unit, a controller, etc. may include controls protection system 5, a display 6, a memory unit/logger parameters 7, buzzer 8, the device input/output information 9 and, if necessary, other devices, such as a real time clock connected directly to the microcontroller 2 or to the device input/output information 9. Part of these devices may not be included in the information control unit 1. These devices can connect to the device input/output information 9 as the external device information control unit 1.

The device input / output information 9 provides the coordination logic level input and output signals of the microcontroller 2 with other functional units of the system and based on the front-end chips. Data transfer in the system, depending on the version of the device input / output information 9 and the interface circuits connected devices is performed via the radial circuit using individual wires, on the multiplex channel of communication (CAN, LIN, RS-485 etc) and/or over the air (Wi-Fi, Bluetooth, ZigBee, GSM, CDMA etc). In the latter case, all the plug device is two, including sensors 3 are installed transceivers with appropriate antennas.

The output device 4, which may be cited as the Executive device, the output or power unit, expansion unit, the output controller, etc. may be made in the form of a set of electromagnetic power relay or the power electronics switches, connected to the electro-hydraulic or electromagnetic actuators actuators crane machine. If necessary, it may contain a microcontroller and some interface scheme for wired or wireless communication with the information-managing unit 1.

A set of sensors 3 depends on the implementation of the proposed protection system and on the type of crane - bridge or : crane, crane with telescopic or lattice boom crane, hydraulic or cable drive mechanism of lifting, etc. Sensors 3 in the General case include the sensor elevation (tilt) of the boom, the sensor length of the boom, the sensor weight (force sensor or a pressure sensor), a sensor of the angle of rotation of the rotary platform crane (sensor azimuth), the limit switch hoist lifting body proximity sensor to the transmission line, the sensors of the provisions of the manual controls actuators that is Attiki provisions of outriggers, the pressure sensors in the hydraulic cylinders bearings, angular rate sensor actuator cargo winches and other sensors. Part of the sensors 3 can also include sensors parameters of the external environment - ambient air temperature, wind speed, presence of precipitation, fog, etc.

The sensors 3 can be combined into groups by their location on the crane, for example on top Telescopium arrows, at its root partition on non-part crane, etc. In this case, each group is supplied with a controller implemented on the microcontroller and converts the level, gain, normalization and/or processing output signals of these sensors filtering, temperature compensation, linerization etc. before sending them to the information-management section 1.

Controls 5 made in the form of a set of keys/buttons, switches, touch screen display, the display unit 6 and the like, If necessary, use an additional controller organs indication (e.g. keyboard controller).

The indicating unit 6 can be placed in the information-control unit 1, and beyond. It may contain both character and graphics, such as TFT LCD, led (display) and/or led indicators. Buzzer 8 may also have the ü accommodation to crane and contains an acoustic transducer (emitter audio) power amplifier (if necessary, with the synth sound signals).

The protection system may further comprise a memory block (register settings) 7 crane, built-in information-management unit 1 and/or removable (external). It is mainly in the form of a block of non-volatile Flash memory connected to the microcontroller 2 and/or to the device input / output 9 (conventionally in the drawing shows the first option). This unit may further comprise a real time clock.

The security system works as follows.

Before you begin lifting crane in memory of the microcontroller 2 or in the memory unit 7 in advance (before the valve) in the form of formulas routines of the microcontroller, are designed using a mathematical model of the crane, or in the form of tables are written to the allowable loads for each main load-bearing element or Assembly crane (for example, limit values mass of lifted cargo, efforts in the mechanism teleskopowe, efforts in the rotation mechanism, and so on) and the maximum possible displacement of the elements and subassemblies of the crane (e.g., arrows) after actuation constraints on coordinate protection (protection from collisions with different obstacles) for different spatial positions of its elements is s and Assembly units (arrows, hauling and so on), as well as the maximum allowable load moment of the crane is in different operating modes (with complete or incomplete reference circuit, loaded with various equipment and so on).

The maximum allowable loads, load moment and displacements, in General, are recorded for different values of the parameters of the environment (ambient temperature, wind speed and so on) as functions of these parameters, or in the form of tables.

These values can be recorded for different values of measurement parameters crane in the form of tables or functions (subroutines)that enables the correction of these limit values depending on the a priori known values of errors of the sensors 3, in particular their passport metrological characteristics. In this case, the maximum permissible loads and load moment decreases with increasing measurement errors and therefore calculate their actual values. The level of fire protection on these parameters do not exceed the actual maximum values of these parameters measured/calculated with errors, defined the actual precision of the sensor 3. Similarly, the maximum possible value of re is of eseni elements and subassemblies of the crane (for example, his arrows) after actuation constraints on coordinate protection (value "coasting" after tripping) increase with increasing measurement errors of their spatial position from the condition that these values ensures timely stop tap is protected from collisions with obstacles. Thus, in particular, take into account that this accuracy depends on the ambient temperature, the voltage level of the power system security and/or values of any other parameters measured by the sensors 3.

Depending on the options the implementation of the proposed protection system in the microprocessor memory 2 or memory unit 7 can be pre-recorded information about those elements and Assembly nodes crane, overload which most likely for the current spatial position and/or current operating conditions of the load-lifting crane, as well as information about the most dangerous in these conditions, the parameter of the crane - power load any element or Assembly of the crane, its cargo stability or the distance to obstacles. These data can be obtained by expert estimates, by calculation when designing a protection system, by analyzing statistical data about previous accidents cranes or received as a result of the experimental studies. In the microprocessor memory 2 or memory block 7, they can be written in the form of tables and/or formulas routines work microcontroller 2. Similarly saved data, allowing the calculation of the values of the load of each power element and Assembly crane, stock, cargo stability of the crane and distances to obstacles. These data are determined by the design of the crane or the protection system mainly calculated using a mathematical model of the crane.

Before you begin lifting crane the crane operator using controls 5 sets of parameters crane, describing its geometry, conditions, and mode of operation. The number and type of these parameters are determined by the specific design of the lifting crane and the requirements for its safe operation. These include the type used on the boom equipment (availability, length and angle of inclination of the jib), characteristics of the reference circuit, restrictions on coordinate protection, etc.

The microcontroller 2 operates according to the program stored in its built-in program memory or in the memory unit 7, and through the device input/output information 9 communicates with sensors operating parameters of the valve 3 by the total multiplex communication line, and/or by a separate wire, the/or radio. After receiving information from sensors 3 microcontroller 2 determines the actual values of the operating parameters is the current load of the crane, his stock freight sustainability and the actual position of its elements and subassemblies, in particular lifting (boom) equipment. If necessary, to determine the current values of these parameters, we carry out the necessary conversion of the output signals of the sensors 3. This takes place when the current load of the crane and/or the position of its elements and subassemblies are measured indirectly, for example when determining the load on the boom hydraulic crane on the pressure rod and the piston cavities of the hydraulic cylinder of lifting. The algorithms of these transformations are well known and are implemented in software by the microcontroller 2.

Next, the microcontroller 2, working on the program, identifies the parameter exceeding the permissible value which is most likely for the current spatial position and/or current operating conditions of the load-lifting crane. If, for example, is the lowering of the cargo boom, it most likely is the reduction of cargo stability of the crane to the maximum permissible value, and if, for example, is the location of the valve with a small load to the left, then the greatest danger to the crane it is tolkovanie with an obstacle, from the left side. After that, the microcontroller 2 priority compares the values of this parameter with its valid value (in the above examples - stock cargo stability (load moment) and distance to obstacles on the left), and then generates the control signals by the output device 4, aimed at limiting this parameter. Other operating parameters of the valve are compared with their valid values after the completion of all actions identified by the parameter most important for safe operation of the crane.

This ensures faster implementation of the system and its protective functions and therefore increases the safety of the crane and reduced movement elements and subassemblies of the crane after reaching their limit positions on the coordinate protection.

Additionally, the microcontroller 2 implements prevention, detection and possible correction of incorrect operator actions when entering parameters boom system and/or the basic contour of the lifting crane.

For this purpose, in the simplest case, the values typed by the operator by means of governing bodies 5 are displayed using the display unit 6 and used in the system of protection only after their visual about Erki operator and validate their input using one of the controls 5.

The system may also automatically identify incorrectly entered by the operator parameters boom system and/or the reference path. For this purpose, the microcontroller 2 analyses the changes in the operating parameters of the crane, characterizing the load and/or the spatial position of its elements and/or assemblies. In particular, detects errors when entering the multiplicity of the hoist winch part of the polyspast.

The definition of the microcontroller 2 the real values of this ratio may be based on a comparison of the speed of movement of the hook clip (lifting/lowering) and the speed of movement of the hoist rope or angular velocity of the drum cargo winch, or by comparing the weights lifted/moved, calculated on the basis of the results of measuring forces in the cargo rope and effort in strelba rope or pressure in the lift cylinder boom, or on the comparison of measured values of weight lifted/moved and output power of the drive cargo winches. The drive power in the latter case is determined by measuring the rate of movement of the hoist rope or angular velocity of the drum cargo winches and torque transmitted by the shaft drive cargo winches (pressure values in its hydraulic actuator), and subsequent re is norene of these quantities. In these cases, the microcontroller 2 using pre-made in his memory functional dependencies calculates the actual number of hoist winch part of the polyspast, compares it with the value entered by the operator, and then either blocks the operation of hoisting crane with the issuance of a warning message to the operator via the display unit 6 and the sounder 8, either automatically corrects the error of the operator.

In the simplest case, the control of correctness of input multiplicity of hoist winch part of the polyspast can be carried out by the microcontroller 2 by identifying the impossibility of the crane with the entered value of this ratio for a given length of the boom. For example, the introduction of the operator of the high values of the ratio Spasovka of the polyspast when operating crane with jib is obviously wrong. This error is corrected by the microcontroller 2 by the automatic setup unit value ratio of the hoist winch part of the polyspast with the introduction of the operator parameter indicative of the jib.

A similar approach is being used to identify incorrectly entered by the operator parameter indicative of the jib (boom extender). For this purpose, the microcontroller 2 maps change the angle or length of the boom and the corresponding change in the truck PTO is the crane.

The detection of this error is possible by comparison of the calculated values of the load moment and the moment of inertia of the turntable of the crane with the load, which is determined by calculation after measuring accelerations, forces or torques in the drive rotation of the crane. These mapping implements the routine operation of the microcontroller 2, developed using a mathematical model of the crane.

It is also possible to automatically identify and, if necessary, correction of errors in the input parameters of the reference circuit. For this example, the microcontroller 2 reveals inconsistencies values of freight time, calculated using the measurement results of the effort or pressure in the mechanisms of outriggers and mechanism arrows.

In case of realization of automatic detection and automatic installation of individual parameters on the boom system and/or the basic contour of the crane it is possible to exclude the input of these parameters by the operator. This leads to the simplification of controls 5.

To further improve the safety of crane in information-management unit 1 (in the microcontroller 2) can be implemented by changing the allowed values of the parameters depending on the errors of the sensors used. For this purpose, the microcontroller 2 carries out, is for example, automatic reduction of the allowable load values and/or increasing the permissible value of the cargo stability of the crane when increasing the error of the sensor 3. Algorithms of this reduction is recorded in the microprocessor memory 2 or memory unit 7. The most common cause of change of error sensors is the change in the ambient temperature, controlled by one of the sensors 3.

In any case the proposed system protection control signal forming the output device 4, to allow different movements of the valve after actuation of the limitations of his movements, possibly taking into account the prehistory of the approach of any parameter to its allowable value. For this purpose, the microcontroller 2, after identifying the element or Assembly of the crane, the movement which led to the formation of control signals by the output device 2, the blocking these movements, and analysis of the prehistory of the occurrence of this block on the corresponding subprogram of their work determines the permitted movement of the crane. For example, if you have to stop lifting for overload due to the proximity of the load on the boom to the maximum permissible value, and the supply of cargo stability of the crane remains large enough, the security system allows lowering the boom of the crane. If the overload is occurred due to exceeding the permissible values of freight time the protection system, forming the corresponding control signals by the output device 2, allows lifting of the boom while maintaining the prohibition of its sinking.

To document the work of hoisting crane system may contain built-in or external Registrar settings implemented on the basis of the memory unit 7, in which the microcontroller 2 writes the values of the basic operating parameters of the crane (the value of the load moment, angle and boom length and so on), warning signals and control signals by a crane with a view to their subsequent read to analyze the efficiency of the crane and to investigate possible causes of failures and accidents.

In this specification, schematically shown only private options for implementation of the proposed protection system of hoisting crane. The invention encompasses other possible variants and equivalents without departure from the invention set forth in the formula.

Sources of information

1. US 5730305 A, MPK B66C 13/16, 13/18, 24.03.1998.

2. EN 2282577 C2, MPK7 B66C 23/88, 15/00, 27.08.2006.

1. Protection system crane containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or b is provodnogo connected to the above-mentioned sensors and actuators and computing coordinates of elements and/or assemblies relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane, comparing at least one of the calculated values of these parameters with valid values recorded in the memory information control unit, and forming, depending on the results of these comparisons, control signals actuating device aimed at blocking the movements of the crane of conditions prevent exceeding those allowable values and the resolution of the remaining movements of the crane, wherein the information control unit is additionally configured to identify the parameter exceeding the permissible value which is most likely at the current time for the current spatial position and/or current operating conditions of the load-lifting crane, and the priority of the comparison of this parameter with its valid value.

2. The system according to claim 1, wherein the information managing unit configured to use a mathematical model of the crane is to identify parameter exceeded the valid values most likely.

3. The system according to claim 1 or 2, wherein the information managing unit configured to detect the specified parameter by determining the most loaded of power and control is about the element or Assembly, or decrease in the stock cargo stability of the crane, or the definition of an element or Assembly of the crane is approaching an obstacle on the minimum distance based on the current spatial position and/or current operating conditions, and/or configuration of lifting equipment and/or provision of supports of the crane, and/or the current value of the speed lift/lower and/or movement of cargo and/or climatic parameters of the external environment, in particular the ambient temperature and/or wind speed, and/or the presence of precipitation.

4. The system according to claim 1 or 2, characterized in that the information-managing unit is configured to identify and remember the history of the approximation parameter to its allowable value, and generate control signals actuating device, designed to block or allow various movements of the crane, taking into account this background.

5. The system according to claim 1 or 2, characterized in that the information-managing unit further comprises a built-in device readout/alarm, and/or the Registrar of parameters, and/or a storage device or configured to connect to at least one of these devices.

6. Protection system according to claim 1 or 2, characterized in that at least part of the load sensors and/or the space is tion of the provisions of the combined, at least one group according to the location of these sensors on the crane, and at least one group is provided with a controller made with the possibility of conversion and/or processing output signals of these sensors and their wired or wireless transmission in the information-managing unit.

7. Protection system crane containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or wireless connection to him the above-mentioned sensors and actuators and computing coordinates of elements and/or assemblies relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane within the parameters of the boom system and/or the reference circuit crane, comparing at least one of the calculated values of these parameters with valid values recorded in the memory information control unit, and forming, depending on the results of these comparisons, control signals actuating device designed to prevent exceeding these limits, characterized in that the data control unit is additionally configured to automatically determine the parameters of the boom system and/or the reference circuit crane, or warning and/or detection and/or correction of incorrect operator actions when you enter these parameters with the possibility of the formation of the warning information signals and/or control signals actuating device aimed at eliminating the consequences of their wrong actions.

8. Protection system according to claim 7, wherein the information managing unit configured to output information indicators input parameters boom system and/or the reference circuit and generating control signals actuating device permitting operation of the crane, after the operator confirms the correctness of their input.

9. Protection system according to claim 7, wherein the information managing unit configured to automatically detect incorrectly entered by the operator parameters boom system and/or the reference path by analyzing changes in the operating parameters of the crane, characterizing the load and/or the spatial position of its elements and/or assemblies.

10. Protection system according to claim 9, characterized in that the information-managing unit is configured to automatically detect incorrectly entered by the operator multiplicity of hoist winch part of the polyspast.

11. The security system of claim 10, distinguish what the lasting themes what information managing unit configured to automatically detect incorrectly entered by the operator multiplicity of hoist winch part of the polyspast by matching the speed of movement of the hook clamps or lifting/lowering of the load and speed of the hoist rope or angular velocity of the drum cargo winches or by comparing values of weight lifted/moved, calculated on the basis of the results of measuring forces in the cargo rope and effort in strelba rope or pressure in the lift cylinder boom.

12. The security system of claim 10, wherein the information managing unit configured to automatically detect incorrectly entered by the operator multiplicity of hoist winch part of the polyspast by comparing the measured values of the weight lifted/moved and output power of the drive cargo winch.

13. Protection system according to item 12, wherein the information managing unit configured to measure the output power of the drive cargo winches by measuring the rate of movement of the hoist rope or angular velocity of the drum cargo winches and torque transmitted by the shaft of the cargo winch, or the amount of pressure in its hydraulic actuator, and the subsequent multiplication of these amount is.

14. The security system of claim 10, wherein the information managing unit configured to automatically detect incorrectly entered by the operator multiplicity of hoist winch part of the polyspast by control the operation of the crane with the entered value of this ratio for a given length of the boom, in particular with the operator parameter indicative of the jib.

15. Protection system according to any one of claims 7 to 14, characterized in that the information-managing unit is configured to automatically correct the value entered by the operator multiplicity of hoist winch part of the polyspast.

16. Protection system according to item 15, wherein the information managing unit is configured to automatically set a single value ratio of the hoist winch part of the polyspast with the introduction of the operator parameter indicative of the jib.

17 protection System according to claim 9, characterized in that the information-managing unit is configured to automatically detect incorrectly entered by the operator parameter indicative of the jib.

18. Protection system according to 17, wherein the information managing unit configured to automatically detect incorrectly entered by the operator parameter indicative of the jib by mapping changes in the GLA inclination and / or length of the boom and the associated changes in load moment of the crane or by comparing the calculated values of the load moment and the moment of inertia of the turntable of the crane with the load, defined information managing unit using measurements of accelerations and/or effort or moments in the drive rotation of the crane.

19. Protection system according to claim 7 or 9, characterized in that the information-managing unit is configured to automatically detect incorrectly entered by the operator parameters of the reference circuit and/or the boom system (part of the length of the boom/departure, for example, installation of jib) by identifying inconsistencies values of freight time, calculated using the measurement results of the effort or pressure in the mechanisms of outriggers and the mechanism for maintaining the boom of the crane.

20. System according to any one of claims 7 to 14, 16 to 18, characterized in that the information-managing unit additionally or contains embedded device readout/alarm, and/or the Registrar of parameters, and/or storage device, or configured to connect to at least one of these devices.

21. System according to any one of claims 7 to 14, 16 to 18, characterized in that at least part of the load sensors and/or the spatial position of the joint, at least one group according to the location of these sensors on the crane, and at least one group is provided with a controller, configured to convert and/or clicks the processing of the output signals of these sensors and their wired or wireless transmission in the information-managing unit.

22. Protection system crane containing the load sensors and/or the spatial position of its elements and/or assemblies, the Executive unit and information-control unit is made on the basis of the microcontroller with the ability wired and/or wireless connection to him the above-mentioned sensors and actuators and computing coordinates of elements and/or assemblies relative to the boundaries of the working area of the crane, and/or loads in them, and/or stock cargo stability of the crane, comparing at least one of the calculated values of these parameters with valid values recorded in memory information-control unit, and forming, depending on the results of these comparisons, control signals actuating device designed to prevent exceeding these limits, characterized in that the information-control unit is additionally configured to change the allowed values of the parameters depending on the error mentioned sensors.

23. Protection system according to item 22, wherein the information managing unit is configured to automatically reduce the allowable load values and/or increasing the allowable value of the cargo stability when increasing pogress the amount of load sensors and/or the spatial position of the elements and/or assemblies of the lifting crane.

24. Protection system according to item 23, wherein the information managing unit is configured to the specified reduction allowable load values and/or increasing the allowable value of the cargo resistance depending on a priori established maximum error of the sensors at different values of ambient temperature.

25. System according to any one of p-24, characterized in that the information-managing unit additionally or contains embedded device readout/alarm, and/or the Registrar of parameters, and/or storage device, or configured to connect to at least one of these devices.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to handling machinery and can be used in the systems of control and protection of climbing cranes. The safety system incorporates digital computing unit (1) with its data inputs receiving, via a data exchange multiplexer channel, the outputs of the crane parameter recording peripherals (71...7m) comprising, at least, one crane equipment travel pickup, and with outputs wired to crane parameter recorder (3) with real-time counter, display unit (4), preventive signaling unit (5), actuator (6) and external memory (2) communicating, via a two-way data exchange channel, with the digital computing unit. The system comprises, at least, one indicator (8) of the crane equipment crossing of, at least, one check point within the crane operating range, the said indicator being connected to the digital computing unit additional data input adapted to correct the crane equipment travel pickup readings in compliance with the signals generated by the aforesaid indicator.

EFFECT: higher reliability of the crane coordinate protection system operation.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used in control protection systems of electrically-driven load lifting machinery. The system incorporates a digital computing unit (1) with its data inputs connected, a multiplexer data exchange channel, with the crane parameter recording peripherals, while its outputs are connected with crane parameter recorder (3) with a real-time counter, display unit (4), nonurgent alarm unit (5), actuator unit (6) and external memory unit (2) connected to the digital computing unit by a duplex data exchange channel. The system comprises the crane supply voltage parameter meters (81...8n) with their outputs connected, via the multiplex data exchange channel, to additional crane parameter recorder data inputs, those of the computing unit and the display. The digital computing unit is designed to compare the measured voltage with tolerable supply voltage parameters, to generate crane motions inhibiting signals in the case of the supply voltage parameters falling beyond tolerances for crane control system, to generate signals inhibiting certain types of the cranes motions in the case of the crane drives supply voltage falling beyond tolerances and to generate sound and light nonurgent alarm signals under the aforesaid conditions.

EFFECT: higher reliability of the crane operation.

2 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: in compliance with the proposed method, with electric key set up, loads are uplifted in turn, their weights making m0, ..., mi-1, mi where i=2, 3, ..., and the motor shaft respective rpm making n0, ..., ni-1, ni being recorded by means of the accelerometer arranged on the base plate or the crane motor bed are memorised. The accelerometer output signal is subjected to spectral analysis with the frequency whereat the motor bed vibration fundamental amplitude is determined corresponding to the motor shaft rpm. Now, proceeding from the data obtained, the dependence of the motor rpm upon the uplifted load n=f(m) is derived to be memorised along with the known tolerable uplifted load weight value. Now, uplifted the load, the motor shaft rpm value is continuously measured by accelerometer to define, proceeding from n=f(m), the load weight. If this weight exceeds the tolerable value, audio and visual warning signals are output and the crane if cut off.

EFFECT: higher reliability of the crane capacity limiter.

6 dwg

FIELD: hoisting-and-transporting mechanical engineering.

SUBSTANCE: invention can used in the crane control and safety systems. Method consists in transfer of control signals from remote control board (RCB) located outside the crane using a two-way line of wireless communication, measuring the working parameters, converting measured sizes into digital signals, defining safe loads and limiting positions of the crane structural components and switching off its mechanisms on reaching limiting values, recording the crane operating and data signals and time of their arrival into long-term nonvolatile memory to be read out in case of need, and also their remote transfer to the dispatcher control located outside the crane. In addition, RCB outputs the instructions to transfer the crane data and control signals to be written down into RCB nonvolatile memory to be read out in case of need by transmitting the signals to the dispatcher control station, registration and storage of data on the crane operation. Here, note that two-way wireless communication lines are used to this end.

EFFECT: higher reliability of control and registration of crane working parameters.

1 dwg

FIELD: transportation.

SUBSTANCE: adjustment consists in regulation of signals in channels of measurement of boom load, overhang or inclination angles by adding and/or multiplying these signals with the signals corresponding to the adjusting parameters the values of which are preliminary defined and stored in power-independent memory of the safety device. Regulation is made without of reference cargoes proceeding from the conditions of independence of the results of measurement of the lifted and moved cargoes upon the boom length and inclination angle. Values of adjusting parameters are defined, allowing for the boom deflection, as the constants or functions of the boom overhand, length and inclination angle by commands of the operator/crane operator or automatically. The principle of definition of adjusting parameters is based, in particular, on their calculation as unknown factors in a set of the equations derived using the crane mathematical model. The said device contains transducers of the load-lifting crane operating parameters with digital or analog outputs and the digital computing device with power-independent memory.

EFFECT: opportunity of checking the accuracy of the safety device operation without check cargoes is ensured and efficiency of protection of the load-lifting crane is increased.

16 cl, 1 dwg

FIELD: construction.

SUBSTANCE: series of inventions refers to the sphere of tower crane operation security engineering. The method in question presupposes exchange of information on the cranes locations, movements and equipment loads between the control and protection devices of all the "n" jointly operating tower cranes. Additional features: identification of the position of each crane and/or its equipment against the construction site plan, conventional graphical visualisation of the position within the construction site territory of a specified crane and/or its equipment (as well as that of the "neighbouring" cranes and equipment related to them) on the crane display. When the crane operator initiates relocation of equipment related to crane Ki the following is carried out: the intended equipment motion path tracing, display graphical visualisation of the intended motion path(s) of the equipment related both to crane Ki and the "neighbouring" crane(s) whose equipment is currently in motion (by means of exchange of information between the control and protection devices), estimation of the minimum distance between the above paths, graphical visualisation of the point of intersection on the crane Ki display and generation of a signal disabling operation of this crane equipment and light and sound alarm signals in case the paths as having been traced happen to intersect. In order to enable further motion of the crane Ki equipment there is an additional line to be plotted by the crane operator which is intended to restrict motion of the crane equipment (the line becomes graphically visualised on the crane Ki, screen); in case the limiting line has been plotted erroneously operation of the crane Ki equipment and mechanisms is automatically disabled when at the paths intersection point.

EFFECT: improving the hoisting cranes operation standard of safety.

4 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to load-lifting and transportation equipment and it can be used in protection systems of load-lifting cranes. According to proposed method, tolerable loads are determined and memorized in form of function of spatial position of boom, measuring current value of load in process of operation of crane, comparing it with tolerable load and generating warning signal or signal to crane mechanisms aimed at limiting or preventing overload. In process of lifting and/or shifting of load, change of linear or angular position of crane part is revealed additionally whose change is not allowed in current stage of load lifting and/or shifting process. Depending on value of said change of position, additionally warning information signals or crane mechanism control signals are formed aimed either to prevent further increase in said change or to return said part of crane, for instance, boom, into initial position. Protection of crane from overload is implemented with due account both of absolute value and change of value of angle of tilting of crane component part from horizontal or vertical position in process of lifting and/or shifting of load.

EFFECT: improved safety of crane in operation.

21 cl, 1 dwg

FIELD: mechanical engineering; lifting and transportation machinery.

SUBSTANCE: invention can be used in automated protection and control systems of load-lifting cranes. Load-lifting machines drive is controlled by operator acting onto control member, transmission of shifting of said member to control member of drive made to shift any mechanism of load-lifting machine depending on movement of control member, and preliminary determination of tolerable value of at least one parameter characterizing load and/or spatial position of boom or load-gripping member of load-lifting machine, keeping the parameter value in memory, measuring said parameter by direct or indirect method in process of operating of load-lifting machine, comparing measured value with tolerable value and subsequently shaping drive control signal. Control signal is used to interlock shifting of drive control member and if, necessary, to reset member in neutral position. Interlocking of drive control member is done by mechanical blocking of transmission of control member shifting to drive control member or mechanical interlocking of displacement of said member.

EFFECT: increased reliability.

6 cl, 3 dwg

FIELD: mechanical engineering; tower cranes.

SUBSTANCE: method includes periodical continuous polling during which signals are obtained, recorded and memorized which correspond to values of load characteristic of crane, crane geometry and operation conditions, obtained signals are compared with values of characteristics introduced into crane control system before its operation, and after comparing of signals received at polling with tolerable values of characteristics, if they exceed tolerable characteristics, commands of crane operator are cancelled. Introduced additionally into crane control system are parameters of crane operation conditions, speed of wind, ambient temperature and crane condition parameters, load, vibration, temperature of crane drive mechanism lubricants, and voltage in electrical devices. Maximum tolerable values of said parameters are introduced into control system to limit operation of crane drives at which operation of crane should be stopped or can be executed at introduction of definite limitations into operation of crane drive as to speed, accelerations, combined or successive travel motions of drives, obtained signals concerning operation and state of crane are compared with tolerable values, and possibility and conditions of execution of operator's commands are determined, command is left without changes or definite limitations are applied to operation of crane by introducing corresponding corrections to operator's command or execution of command is prohibited according to preset program.

EFFECT: improved safety of operation of tower crane.

1 dwg

FIELD: mechanical engineering; lifting and transportation machine building.

SUBSTANCE: invention can be used in control and protection system of load-lifting cranes. Proposed system contains load pickups 1, boom tilting angle pickups 5, parameters indicator 6 and series-connected tolerable load setting unit 8, comparator 9 and actuating unit 10 whose output is connected to first input of parameters recorder 11, unit to record designed values of parameters 12, correction unit 3, load weight check unit 2, scaling unit 4, variable coefficients unit 14, change-over switch 15, boom deflection recording unit 13 and boom reach calculating unit 7.

EFFECT: improved safety of crane owing to increased accuracy of control of its parameters.

2 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to handling machinery and can be used in the systems of control and protection of climbing cranes. The safety system incorporates digital computing unit (1) with its data inputs receiving, via a data exchange multiplexer channel, the outputs of the crane parameter recording peripherals (71...7m) comprising, at least, one crane equipment travel pickup, and with outputs wired to crane parameter recorder (3) with real-time counter, display unit (4), preventive signaling unit (5), actuator (6) and external memory (2) communicating, via a two-way data exchange channel, with the digital computing unit. The system comprises, at least, one indicator (8) of the crane equipment crossing of, at least, one check point within the crane operating range, the said indicator being connected to the digital computing unit additional data input adapted to correct the crane equipment travel pickup readings in compliance with the signals generated by the aforesaid indicator.

EFFECT: higher reliability of the crane coordinate protection system operation.

1 dwg

FIELD: transportation.

SUBSTANCE: adjustment consists in regulation of signals in channels of measurement of boom load, overhang or inclination angles by adding and/or multiplying these signals with the signals corresponding to the adjusting parameters the values of which are preliminary defined and stored in power-independent memory of the safety device. Regulation is made without of reference cargoes proceeding from the conditions of independence of the results of measurement of the lifted and moved cargoes upon the boom length and inclination angle. Values of adjusting parameters are defined, allowing for the boom deflection, as the constants or functions of the boom overhand, length and inclination angle by commands of the operator/crane operator or automatically. The principle of definition of adjusting parameters is based, in particular, on their calculation as unknown factors in a set of the equations derived using the crane mathematical model. The said device contains transducers of the load-lifting crane operating parameters with digital or analog outputs and the digital computing device with power-independent memory.

EFFECT: opportunity of checking the accuracy of the safety device operation without check cargoes is ensured and efficiency of protection of the load-lifting crane is increased.

16 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: device contains the base and the force pickup attached thereto, two support elements and the deformable element connecting free ends of the support elements and attached, by its central part, to force pickup. The device additionally contains the electronic device made to compare the force pickup output signal with that corresponding to the maximal lifting capacity of the mechanism, and to generate the signal to lock its operation, and/or a warning light and/or sound signal depending on results of this comparison. The device, a second version, contains the force pickup, two support elements and two deformable elements jointing the support elements. The force pickup is attached to the central parts of deformable elements. One deformable element is made either elastic or in the form of rigid parts with elastic hinges.

EFFECT: higher safety in operation of the load-lifting mechanism and accuracy of measurement of the cable tension.

12 cl, 3 dwg

FIELD: construction.

SUBSTANCE: series of inventions refers to the sphere of tower crane operation security engineering. The method in question presupposes exchange of information on the cranes locations, movements and equipment loads between the control and protection devices of all the "n" jointly operating tower cranes. Additional features: identification of the position of each crane and/or its equipment against the construction site plan, conventional graphical visualisation of the position within the construction site territory of a specified crane and/or its equipment (as well as that of the "neighbouring" cranes and equipment related to them) on the crane display. When the crane operator initiates relocation of equipment related to crane Ki the following is carried out: the intended equipment motion path tracing, display graphical visualisation of the intended motion path(s) of the equipment related both to crane Ki and the "neighbouring" crane(s) whose equipment is currently in motion (by means of exchange of information between the control and protection devices), estimation of the minimum distance between the above paths, graphical visualisation of the point of intersection on the crane Ki display and generation of a signal disabling operation of this crane equipment and light and sound alarm signals in case the paths as having been traced happen to intersect. In order to enable further motion of the crane Ki equipment there is an additional line to be plotted by the crane operator which is intended to restrict motion of the crane equipment (the line becomes graphically visualised on the crane Ki, screen); in case the limiting line has been plotted erroneously operation of the crane Ki equipment and mechanisms is automatically disabled when at the paths intersection point.

EFFECT: improving the hoisting cranes operation standard of safety.

4 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to load-lifting and transportation equipment and it can be used in protection systems of load-lifting cranes. According to proposed method, tolerable loads are determined and memorized in form of function of spatial position of boom, measuring current value of load in process of operation of crane, comparing it with tolerable load and generating warning signal or signal to crane mechanisms aimed at limiting or preventing overload. In process of lifting and/or shifting of load, change of linear or angular position of crane part is revealed additionally whose change is not allowed in current stage of load lifting and/or shifting process. Depending on value of said change of position, additionally warning information signals or crane mechanism control signals are formed aimed either to prevent further increase in said change or to return said part of crane, for instance, boom, into initial position. Protection of crane from overload is implemented with due account both of absolute value and change of value of angle of tilting of crane component part from horizontal or vertical position in process of lifting and/or shifting of load.

EFFECT: improved safety of crane in operation.

21 cl, 1 dwg

FIELD: mechanical engineering; lifting and transportation machine building.

SUBSTANCE: invention can be used in control and protection system of load-lifting cranes. Proposed system contains load pickups 1, boom tilting angle pickups 5, parameters indicator 6 and series-connected tolerable load setting unit 8, comparator 9 and actuating unit 10 whose output is connected to first input of parameters recorder 11, unit to record designed values of parameters 12, correction unit 3, load weight check unit 2, scaling unit 4, variable coefficients unit 14, change-over switch 15, boom deflection recording unit 13 and boom reach calculating unit 7.

EFFECT: improved safety of crane owing to increased accuracy of control of its parameters.

2 cl, 2 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to safety and control systems of load lifting cranes. Proposed method of supply of measuring and control component part of safety and control system arranged on boom or tackle block of load-lifting crane comes to use of self-contained supply source with automatic charging the source from generator - converter of mechanical energy of moving load or boom wire rope of load-lifting crane or block directing or supporting the wire, rope, into electric energy. According to invention, said component part of safety and control system of crane provides measuring of at least one operating parameter and control of loads, particularly, marker light and/or headlight. To charge self-contained supply source, in additional of wire rope motion energy, use can be made of energy of external mechanical actions, solar energy or heat energy of surrounding medium. Transmission of data between component parts of system can be provided by wireless data exchange channel.

EFFECT: facilitated maintenance, increased reliability, provision of serviceability of safety and control system of crane.

16 cl, 2 dwg

FIELD: mechanical engineering; load-lifting cranes.

SUBSTANCE: invention can be used in control and protection system of load lifting cranes to preclude overloads and damage in crane mechanisms. Proposed system consists of separate parts made in form of at least one electronic unit and pickups measuring parameters of load-lifting crane. To supply electronic circuit of any component of safety system use is made of self-contained supply source which is constantly or periodically charged. Conversion of mechanical energy of load or boom rope, or energy of measured parameter of operation of load-lifting crane, mechanical energy of measured load in boom or load rope, angle of azimuth length of boom, etc or hydraulic energy of measured pressure in hydraulic cylinder or in hydraulic boom lifting/lowering motor, load-gripping member or slewing platform of load-lifting crane or energy of external mechanical, acoustic or heat ambient medium onto parameter pickup of load lifting crane into electric energy is provided.

EFFECT: simplified servicing, improved reliability, provision of serviceability of safety system at cut off supply.

23 cl, 1 dwg

FIELD: materials handling facilities; crane safeguards.

SUBSTANCE: invention relates to overload and damage protection of load-lifting cranes and cranes-pipelayers. Proposed method comes to adjusting at least one signal in at least one load measuring channels and/or reach, and/or luffing angle to provide correspondence of safeguard switch off characteristic to preset load characteristic of crane by adding and/or multiplying results of direct or indirect measurement of at least one of crane operating parameters and signals corresponding to adjustment parameters whose values are stored in non-volatile memory of safeguard. Values of adjustment parameters are determined to provide independent switching off characteristic of safeguard from direction and/or speed of boom movement or speed of movement of crane load gripping members. Different adjustment parameters for different directions and/or speeds of boom and/or load-gripping member can be set.

EFFECT: simplified mounting and servicing of safeguards on crane, improved accuracy of realization of protection functions.

18 cl, 2 dwg

FIELD: mechanical engineering; load-lifting cranes.

SUBSTANCE: invention relates to overload and damage protection of load-lifting cranes. According to proposed method, to prevent emergencies preliminarily determined are tolerable values of parameters characterizing load, and/or spatial position of crane boom and/or load gripping member which are memorized and, in process of operation of crane, one of said parameters is measured and compared with tolerable value, and signals are formed to control crane actuators aimed at preventing excess of tolerable value by measured parameter. Determination of parameters characterizing spatial position of boom, load-gripping member, supports, construction members of other crane or any obstacle in height is based on measuring values of barometric pressure in corresponding points and subsequent calculation of heights. Construction is simplifier, and effective protection of spatial position pickups of crane from mechanical damages if provided. Safety of load-lifting crane in operation is improved owing to accurate and effective measuring of distance between crane and obstacles and prevention of emergencies caused by tilting of fixed platform or portal of crane from horizontal position and in case of approaching thunderstorm.

EFFECT: improved safety of load-lifting crane.

25 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to handling machinery and can be used in the systems of control and protection of climbing cranes. The safety system incorporates digital computing unit (1) with its data inputs receiving, via a data exchange multiplexer channel, the outputs of the crane parameter recording peripherals (71...7m) comprising, at least, one crane equipment travel pickup, and with outputs wired to crane parameter recorder (3) with real-time counter, display unit (4), preventive signaling unit (5), actuator (6) and external memory (2) communicating, via a two-way data exchange channel, with the digital computing unit. The system comprises, at least, one indicator (8) of the crane equipment crossing of, at least, one check point within the crane operating range, the said indicator being connected to the digital computing unit additional data input adapted to correct the crane equipment travel pickup readings in compliance with the signals generated by the aforesaid indicator.

EFFECT: higher reliability of the crane coordinate protection system operation.

1 dwg

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