Method of load-lifting crane safety electronic device adjustment and safety electronic device

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

 

The invention relates to mechanical engineering and can be used in protecting from overload and damage cranes.

There is a method of configuring device security hoisting crane by lifting bagged cargo in two points of its cargo characteristics (at the minimum and maximum departure) and mechanical regulation of the position of the sensors in the measuring channels load and departure from the terms of the compliance characteristics of the power device cargo characteristics of the crane [1].

A device that implements this method contains sensors operating parameters of the crane is connected to a computing device that generates a given characteristic turn off the faucet when it is overloaded, and the mechanical adjustment of the positions of the sensors on the crane [1].

The disadvantage of this technical solution is the high complexity of the settings on the crane due to the presence of mechanical adjustments.

Also known way to configure the security device of the crane by lifting bagged cargo in the cargo points characteristics with known parameters boom system and control signals in the channels of the load measurement, departure and/or boom angle. Regulation is carried out on conditions ensure compliance with specifications from the your device security cargo characteristics of the crane by adding and/or multiplying the output signals of the sensors signals, the relevant configuration parameters, which pre-determine and store in non-volatile memory [2].

A security device that implements this method contains sensors operating parameters of the crane, the Executive unit, and a digital computer that includes a microcontroller, non-volatile storage device, and the device input/output information. The microcontroller is configured to write and read from non-volatile storage device values of the tuning parameters and with the ability to configure the device security by adding and/or multiplying the tuning parameters of the output signals of the sensors [2].

This technical solution is achieved by reducing the complexity of the configuration of the device by eliminating the mechanical adjustments of the positions of the sensors on the crane. However, the necessity of application of bagged cargo complicates this setting and increases its intensity.

The closest to the invention is a method of configuring an electronic device, safety valve, which consists in the regulation of the signals in the channels of the load measurement, departure and/or boom angle of the conditions of the compliance characteristics of disabling safety devices specified cargo characteristics of the crane, by adding, in the subtraction, division and/or multiplication of these signals with signals corresponding tuning parameters whose values determine using this device and store in its non-volatile memory. Regulation is carried out from a condition of obtaining the zero value of the signal in the measurement channel crane load at different positions of the boom of the crane without load [3].

An electronic security device that is closest to the proposed contains sensors parameters of its work, the output device and digital computer that includes a microcontroller and connected to the device input/output information and the non-volatile storage device configured to store values of the tuning parameters. Inputs and/or bi-directional I/o device input/output information connected respectively to the outputs or bidirectional inputs/outputs of the sensors. The microcontroller is configured to read from the nonvolatile storage device of the values of the tuning parameters and with the possibility of adding, subtracting, multiplying and/or dividing the output signals of the sensors or signals resulting from the conversion of the output signals of these sensors, as well as with the ability to determine the tuning parameters without load lifting PRS is ane of the crane of the conditions for obtaining the zero value of the signal in the measurement channel crane load [3].

This technical solution is achieved by reducing the complexity of the setup device security by eliminating the necessity of lifting.

However, configuring device security without load on lifting the body of the valve leads to low accuracy of this setting because of the inaccuracy of the account of boom deflection. This is because when setting up the device without load deformation arrows only due to its own weight is much less important than when operating crane with maximum loads, especially at low values of departure hauling the boom of the crane. No account of this deflection does not allow to control the accuracy and correctness of configuration electronic security device in the loaded condition of the crane without the use of bagged cargo.

In addition, compensation of the drift of electronic security devices, including parameters of the sensors in a known technical solution is carried out only when there is no load on its lifting body, i.e. compensated for only the drift of the zero signal level in the channel load measurement. At the same time, the compensation of the drift of the gain in the channel load measurement is not carried out. This reduces the accuracy of the device and, according to the respectively, reduce the effectiveness of the protection of crane overload and damage.

The technical result, which directed the claimed invention, is to improve the accuracy configuration of the electronic security device on the crane without tared (or reference) of cargo for the account of the deflection of the boom without significantly increasing the complexity of the configuration.

Other technical result of the invention is the provision of control accuracy and correctness of configuration electronic security device on the crane is in its loaded condition without the use of reference or cargo crane scales (dynamometer).

Another technical result is to increase the effectiveness of the protection of crane overload due to the automatic compensation of the drift parameters of the safety devices during operation of the crane under load.

In the proposed method of configuring electronic security device load-lifting crane, which consists in the regulation of at least one signal in at least one of the channels of direct or indirect measurement of the load, and/or departure, and/or angle of the jib crane of the conditions of the compliance characteristics off electroneg the security device defined cargo characteristics of the crane, by addition and/or subtraction and/or division and/or multiplication of this signal at least one signal corresponding to at least one tuning parameter whose value is determined using an electronic security device and store in its non-volatile memory, the specified technical result is achieved by the fact that the value of the at least one tuning parameter determined from the condition of ensuring the independence of the direct or indirect measurement of weight lifted and/or moved from the departure and/or boom angle, which carry out lifting the same weight for different values of departure and/or boom angle or change the angle and/or the length of the boom with a raised load.

Thus, in particular, are lifting or moving of cargo with a priori unknown weight, not exceeding the capacity of the crane, as well as the dimension of the overhang or boom angle with regard to its bending determined by measuring the angles of its inclination not less than two points.

These technical results are achieved also by the fact that the measurement of weight lifted and/or moved conduct on at least two different values of departure and/or boom angle, then the value of at least one nastroeno what about the parameter set, in particular, using the operator, the minimum difference of these measurements.

Determination of the tuning parameters, in case of realization of the electronic security device based on a digital computer, can be automatically calculated, both in setup mode security device on the faucet, and operating mode of the crane. In the latter case, the values of the tuning parameters determine when the change of departure and/or boom angle when the cargo crane.

To improve the accuracy of the settings may be the smoothing results of measurement of weight lifted and/or moved in the channel measurement crane load caused by changes in the direction and/or speed of his arrows or hauling.

The values of the tuning parameters determine and remember, in the General case, a function of the length and/or angle of the boom. This determination may be performed periodically, then update the values of these tuning parameters in non-volatile memory of the electronic device security. Moreover, the period of determining and updating can be specified either in the form of intervals of time, either in the form of a predefined number of cycles of the lifting/lowering and movement of cargo.

The electron is the second security device contains sensors operating parameters crane, output device and digital computer that includes a microcontroller, non-volatile storage device configured to store values of the tuning parameters, and device input/output information. Non-volatile storage device, and the device input/output information connected to the microcontroller, the input and/or bi-directional I/o device input/output information connected respectively to the outputs or bidirectional inputs/outputs of the sensors operating parameters of the lifting crane. The output of the output device connected to the execution units load-lifting crane, and inputs or bidirectional input/output output device is connected/attached to the additional outputs or input/output microcontroller or device input/output information. The microcontroller is configured to read from the nonvolatile storage device of the values of the tuning parameters and with the possibility of adding, subtracting, multiplying and/or dividing the output signals of the sensors parameters crane or signals resulting from the conversion of the output signals of these sensors. In this device the specified technical result is achieved by the fact that the digital transmitter is additionally vypolnen the ability to detect the difference between the results of direct or indirect measurement of weight lifted and/or moved one mass for different values of departure and/or boom angle, determine the value of at least one configuration parameter from the condition of ensuring the minimum value of this difference and write the value of this configuration parameter in non-volatile storage device.

To obtain the necessary technical results of the digital computer made, in particular, determine the values of the tuning parameters in the process of lifting and/or moving cargo with a priori unknown weight, not exceeding the capacity of the crane. This uses a mathematical model of the crane is stored in its nonvolatile memory device.

Sensors operating parameters of the crane may contain two or more sensor boom angle, placed not less than two of its points. In this case, the digital calculator configured to calculate departure or the effective (average) boom angle, given its deflection is determined using the output signals of these sensors.

In addition, for obtaining the technical results of the digital computer can be performed either by manual input of values of the tuning parameters or automatic detection using microcontroller. In any case the implementation of the digital computer is configured to determine the values of the tuning parameters for different values of the length and/or angle of the boom, and non-volatile storage device with storage in the form of a table or a function of the length and/or angle of the boom.

Thanks to the implementation of these distinctive features in the proposed technical solution is to configure electronic security device on the crane is under load, based on monitoring changes in the magnitude of the signal in the measurement channel load of the crane during lifting or handling arbitrary mass (within the lifting capacity of the crane). The setting is based on the deflection of the boom of the crane without the use of bagged cargo, crane scales or dynamometer. This provides improved tuning accuracy without significantly increasing its complexity.

Additionally offer the possibility to check the accuracy and correctness of configuration electronic security device on the crane is in its loaded condition by lifting and moving cargo priori unknown mass, which greatly simplifies this test due to the lack of necessity of application of bagged cargo.

Configuring the electronic security device on the crane with an arbitrary load can be implemented directly during normal operation of the crane when the execution cycles of the lifting/lowering and movement of goods It provides automatic compensation of the drift of electronic security device directly during operation of the crane with the load and, accordingly, increases the efficiency of protection of crane overload and damage by increasing the accuracy of the safety device.

Therefore, these distinctive signs are in direct causal relationship with achievable technical results.

The prior art is unknown, the application of these features in the system settings of the device (or devices) security cranes and, accordingly, there is no information about their impact on achievement of the following technical results.

On the drawing as an example of the implementation of the proposed method shows a functional configuration diagram of the electronic security device of the lifting crane. This device can be called also by the system or by the safety device of the lifting crane.

The device contains a digital computer 1, also known as electronic control unit, a display unit, a data processing unit and the like, and sensors settings crane 2. Digital computer 1 is made on the basis of the microcontroller 3, is connected to the controls (buttons, keys) 4, indicators (led, character LCD, etc.) 5, non-volatile memory device (chip Flash memory) 6 and the device input/output information 7.

In the case when the change in the device 2 sensors with analog outputs (voltage or current 4-20mA) device input/output information 7 includes an analog-to-digital Converter, and, with the use of digital sensors transceiver or controller multiplex communication channel, in particular the serial interface type CAN (Control Area Network) or UN (Local Interconnection Network).

Output device 8 comprises at least one power switch, made in the form of an electromagnetic relay or a power integrated circuit. The input (or inputs) output device 8 is connected (attached) to the device input/output information 7 or directly to the microcontroller 3 using separate wires or multiplex communication channel, and the output (outputs) to one or more of the execution units 9 crane, which can be used, for example, electromagnetic contactors or solenoid valves incorporated in the hydraulic control system of the crane. Output device 8 can also be combined with the device input/output information 7.

If the electronic security device has a common multiplex communication channel, the output device 8 can be made on the basis of the microcontroller and connected to the multiplex communication channel is analogous to the connection of 2 sensors. In addition, certain sensors, such as limit switches and sensors analog inputs can be connected directly to the output at which trojstvo 8.

The sensor 2 includes, in particular, the sensor load load-lifting crane 10, made in the form of a strain gauge force sensor in the cargo or strelba the rope or in the form of a strain gauge pressure sensors in the hydraulic cylinder for boom lift, gauge the length of the boom 11, made for example in the form of a cable drum with a potentiometric sensor of the angle of rotation, the sensor boom angle 12, made for example in the form of MEMS inclinometer/accelerometer and sensor azimuth angle 13. The device may also contain various additional sensors 14, which includes a sensor inclination angle of the main boom tip (MEMS inclinometer/accelerometer), the limit switch hoist lifting body (limit switch), proximity sensor for transmission lines, discrete sensors organ movements of the crane, the travel sensor cargo winches, etc. Separate sensors, shown in the drawing, may be missing. A specific set of sensors depends on the design of the specific crane and options for the implementation of the proposed method.

Each of the sensors 2 (10-14) may be performed either with analog or digital output. In the first case, each sensor includes a transducer (strain gauge bridge, potentiometer, etc.), the output of which the CSOs directly or through located in the sensor amplifier/inverter by means of a separate wire connected to the appropriate input device input/output information 7. If the sensor is designed with a digital output with multiplex communication channel, it contains connected in series primary transducer, amplifier/Converter, the microcontroller of the sensor and the transceiver, or the driver multiplex communication channel.

Each of the sensors 2 (10-14) can be performed with the normalization of the output signal. In this case, the amplifier/Converter sensor with analogue output or the amplifier/Converter and the microcontroller of the sensor with digital output implement the compensation zero offset, linerization, temperature compensation and calibration of the gain of the transducer of the sensor.

An electronic security device that implements the proposed method configuration operates as follows.

Before operation of the crane the crane operator (operator) using controls 4 located on a digital computer (electronic unit) 1, enters the microcontroller 3 parameters that define the modes of operation of the crane - position retractable poles, number of hoist winch part of the polyspast, availability, length, and angle of inclination of the jib, etc. if this faucet designs enter these parameters is necessary. The entered parameters are saved in non-volatile (Flash) memory 6 or the memory (EEPROM) of the microcontroller 3. The area to ustime values position the boom system of the crane is entered by the operator when setting the coordinate security controls 4 and is also stored in the microprocessor memory 3 or the storage the device 6.

The crane is carried out by moving the crane controls (knobs, levers and the like), for example a hydraulic crane distributors in their respective areas. For the implementation of any motion of the crane is necessary as having control of the operator, and no blocking of the movement from the side of the actuator 9.

When there is no overload of the crane and when his arrows in the zone of permissible regulations coordinate the protection of the microcontroller 3 generates the control signal output device 8 and, accordingly, the execution unit 9, permitting movement of the crane.

Using sensors 2 are implemented channels measurement parameters and modes of operation of the crane, characterizing its load, the lifting position (boom) equipment, etc. and, if necessary, control actions of the operator. Accordingly, under the channel measurement (or measurement channel) refers to the totality of the elements of the device, forming a path and convert the measuring signal from the input (sensor) to obtain the digital value of this parameter or mode in the microcontroller 3 digital transmitter 1.

The microcontroller 3 operates according to the program stored in its memory or in the Zapovednik is nausem device 6, and through the device input/output information 7 on the multiplex communication channel, or on separate lines receives from the sensors 2 values of parameters of the crane. On the basis of these values, the microcontroller 3 determines the current load of the crane and lifting his position (boom) equipment. To determine the current load of the crane and/or the current position of its boom or lifting of the body, in General, a mathematical model is used crane, also recorded in the microprocessor memory 3 or the storage device 6.

If necessary, you may be converting the output signals of the sensors 2. This takes place when the current load of the crane and/or the position of the boom or lifting of the body are measured indirectly - for example, when determining the load on the boom hydraulic crane on the pressure rod and piston cavities lift cylinder boom.

Allowable loading regimes in the form of cargo characteristics of the crane is stored in the microprocessor memory 3 or the storage device 6.

The microcontroller 3 digital computer 1 compares the current load (weight lifted cargo or freight moment) crane with a maximum load value, and comparing the actual position Gruzovaya the nogo equipment with valid area provisions specified with the introduction of coordinate protection. Depending on the results of these comparisons, the microcontroller 3 turns on the output device 8, the switch-off signal corresponding actuators 9. It establishes the necessary characteristics of disconnected movements of the crane, which provides automatic protection against overload and collision boom system with obstacles. At the same time the most important parameters of the crane using indicators 5 are displayed on the front panel digital transmitter (electronics unit) 1.

In addition to the implementation of the protection of the crane, the microcontroller 3 is also in configuration mode security device. A program of his work in this mode is also developed in the design of electronic security devices and stored in the microprocessor memory or storage device 6.

Configuring device security is done directly on the crane or before performing lifting operations (setting mode), either directly during operation of the crane. Setup required after the initial installation of the electronic security device on the faucet, after repair or replacement of any component parts of this device or crane, as well as periodically during its operation on g is azopolymer the crane. This necessity is caused by the absence or inaccuracy of the normalization of the output signals of the sensors 2, the variations of parameters of various cranes (differences in the geometric dimensions, weight, etc.), the inaccuracy of the sensors on the crane - error installation (welding) of the fastening elements and the like, and changes (drift) of the parameters of the electronic security device in operation, in particular the drift of the zero offset and sensitivity of the sensors 2.

The principle setup is based on the fact that when the cargo crane and, accordingly, when the change of departure, length and boom angle signal value in measuring channel its load must remain constant. Similarly when lifting the same load at different points in the cargo characteristics of tap value signal in the measurement channel must also remain unchanged. And this is true both when lifting and moving the reference of cargo and cargo arbitrary mass. If, for example, when lowering the boom with a load, there is an increase/decrease signal for channel measurement of its mass and, respectively, the readings of the mass for indicators 5, it is obviously caused by a misconfiguration electronic security device (if the cargo does not concern the loading/unloading platform, or any teacher who tsti, its weight, obviously, remains unchanged).

The values of signals in the channel measurement of the mass of lifted cargo or load moment (with the aim of further restrictions crane load) have explicit functional dependence on the output signals of the load sensors, the length and boom angle:

where m is the result of measurement of mass (weight) of lifted cargo;

M - the measurement load moment (M=m×R, where R is the departure hauling);

Ψ, f - function, defined by the design of the crane, by placing the crane sensors parameters of its work, and is based on a mathematical model of the crane;

F - value of the input signal of the load cell (force or pressure);

L - value output signal of the sensor length of the boom;

α - the value of the output signal of the sensor boom angle.

Configuring device security at the first stage is carried out when there is no load on the lifting body of the crane.

When there is no load on the lifting body (empty arrow), due to inaccuracies normalization of the output signals of the sensors 2, differences between the design parameters of various cranes, inaccuracies and identical sensors on the crane and changes p the parameters of the safety devices in use is calculated by the digital computer 1 by the formulas (1) mass (weight) of lifted cargo or freight moment generated by the load) is not zero:

where Fo- the value of the input signal of the load cell (force or pressure) when "empty" boom.

Obviously, with zero actual value of the load (weight) on lifting the body - the actual weight lifted cargo (mg=0) value of the input signal of the load sensor in General is not equal to 0 (Fo≠0), since this sensor, in addition to the weight (mass) on lifting the body also affects the weight of the empty arrows, hauling and cargo ropes.

Configuring device security can be done by adding/subtracting the signals in the channels of the load measurement m or M adjustment coefficients, which are equal in magnitude and opposite in sign to the calculated mass values of lifted cargo or freight moment in the time interval in which the load on the lifting body is missing, ie:

Formula (3) illustrate a simple embodiment of the device setup security on the crane without load: in those time intervals in which the load on the lifting body is missing, the microcontroller 3 digital transmitter 1 according to the formula (2) defines the value of the mass (weight) raised what about the cargo m oor load moment Maboutand stores this value in non-volatile memory of the microcontroller 3 or in the storage device 6.

Next, to determine the actual weight lifted cargo m or load moment M microcontroller 3 according to one of formulas (3) performs the subtraction value signal for channel measurement of weight or load moment of the crane and read from the nonvolatile memory the values of the tuning parameter moor Mabout. Obtained by the formula (3) is the microcontroller 3 compares with the valid value for this parameter at this point cargo characteristics of the valve and depending on the results of this comparison forms the control signal through the device input/output information 7 is supplied to the control device 8.

To improve the accuracy of the setting values of the tuning parameters moand Maboutin the General case, are determined for different values of the length and/or angle of the boom and are remembered in the form of functions:

This remembering is in the form of a formula or in the form of a table with the approximation of the intermediate values. In some cases it is possible representation of the tuning parameter maboutor Maboutas a function of one parameter, such as angle α crane fixed vannoy boom length.

Another variant of the first phase adjusting device security on tap (settings without load) is the addition and/or multiplication of the output signals of the sensors in the measuring channels load of departure and/or boom angle signal and the signals corresponding configuration parameters.

In particular, if it is known that the main cause of instability of the parameters of the safety devices is the drift of the zero level (or bias voltage) sensors in the measurement channel load, the weight of lifted cargo or freight moment are determined by the formulas:

where ΔF is a tuning parameter whose value is a priori unknown.

In this case, the problem of the digital computer 1 is in determining the value of the unknown factor ΔF, store it in nonvolatile memory 6 and its subsequent use in subsequent calculations of the mass of lifted cargo or freight moment by the formulas (5).

Because when there is no load on the lifting body (when F=Fo), the values of m and M must be equal to zero, determining the tuning parameter ΔF can be done using one of the formulas:

By mathematical transformations these formulas are given to the form:

Digital computer 1 is able to determine the unknown value of the tuning parameter ΔF or by direct enumeration of all possible values of the conditions for achieving m=0 or M=0, or by calculation according to any of formulas (7), implemented in the program.

If it is known that the main cause of instability of the parameters of the safety devices is the drift of the gain (sensitivity) of the sensor in the measuring channel load, the weight of lifted cargo or freight moment are determined by the formulas:

ie is not the addition and the multiplication values of the input signal of the load cell F and the tuning parameter ΔF. In the rest of the procedure for determining the values of the tuning parameter ΔF and holding configure the security device does not differ from those described above.

Finally, if the cause of the instability of the parameters of the safety devices is drift as the zero level (bias voltage)and the gain (sensitivity) of the sensor in the measuring channel load, the values of weight lifted gr is for or freight moment are determined by the formulas:

i.e. simultaneously uses two tuning parameters: ΔF1 ΔF2.

For their definitions are used in equations:

In this case, to determine the values of the tuning parameters ΔF1 ΔF2 must be setup after receiving initial data for configuring at least two different values of the length L and/or boom angle αthat occur in different parts of one cycle of the lifting/lowering and movement of cargo or in different cycles. I.e. for digital computer 1 the problem of determining the tuning parameters during normal operation of the safety devices (without switching to the setting mode) is reduced to the solution of a system of two equations (10) with two unknowns. Algorithms and programs such solutions are well known. Further values of the tuning parameters ΔF1 ΔF2 remembered and using formulas (9) similarly used when configuring the security device.

Regulation when configuring the security device can also be not in the channel load measurement, and the measurement channel of departure and/or boom angle. In this case, formulas (8) and (9) in the same way is the situation and/or multiplication of the values of the output signal of the sensor length of the arrows L and sensor boom angle α with appropriate tuning parameters, i.e. in the General case:

This leads only to an increase in the dimension of the problem of determining the values of all the tuning parameters ΔF1that ΔF2, AL1, AL2that Δα1and Δα2is it necessary solutions using digital computer 1 system of 6 equations with 6 unknowns when F=Fo, m=0 and M=0 on the basis of data received on at least 6 different values of length and boom angle. In the rest of the setup procedure of the security device does not differ from those described. The values of these tuning parameters can also be determined as a function of measured parameters F, L, and/or α and, respectively, stored in the nonvolatile memory of the microcontroller 3 digital transmitter 1 or the storage device 6, for example, in a tabular form with the following approximation of their values at intermediate values of F, L and/or α.

In practice settings, with the aim of simplification, it is reasonable to exclude some of the tuning parameters ΔF1that ΔF2that ΔL1that ΔL2that Δα1and Δα2retaining only the most significant ones. The significance test - grade the influence of each of these tuning parameters on the accuracy of determination of the loading crane.

Expression (3) or (11), as a result, the first phase adjusting device on tap (settings without load), can be transformed and represented in the form:

where Ψaboutand faboutfunction Ψ and f adjusted the obtained values of the tuning parameters - all parameters ΔF1that ΔF2that ΔL1that ΔL2that Δα1and Δα2or part thereof.

Experience shows that setting up a security device on the crane without load on its lifting body provides a relatively high accuracy formation of the characteristic turn off this device when operating crane with small loads and for large departures when the weight of the boom is a significant portion of the total load of the crane. However, when working with heavy loads, especially at longer arrows and small departures (for large values of L and α) tuning accuracy is insufficient. This is due to the deflection of the boom under load. This deflection in the General case has a nonlinear dependence on the moment of forces of bending of the boom.

Therefore, to ensure the necessary precision configuration, additionally the setting of safety devices on the crane with the load. For such a configuration may use is to be known as cargo mass (bagged cargo), and cargo with a priori unknown mass.

In this case, the value of the signal in the measurement channel weight

where Fx- the value of the input signal of the load cell (force or pressure).

Not enough accurate accounting of boom deflection leads to the fact that m≠mxi.e. the value of the signal in the measurement channel cargo m does not correspond to the actual value of mxon lifting the body of the faucet. Therefore, a necessary second step in configuring device security configuring the crane with the load.

In a first approximation, this setting can be done using the formula

where Δα - tuning parameter that takes into account the deflection of the boom.

If the setting is carried out with a load of known weight, then the settings are quite in manual mode using the operator (operator's) to pick up, i.e. introduce the microcontroller 3 using the management bodies 4, the value of the tuning parameter Δα from the condition of coincidence of the measured and actual values of the load.

If the setting is done with a cargo of unknown mass or in the automatic mode, the microcontroller calculates the value of this configuration parameter Δα from the condition of ensuring the independence of the measure the weight from the length and boom angle.

The task is complicated by the fact that the value Δα is not constant, but depends on the values of the output signals of the sensors - FxL α

This requires the data set by the deflection of the boom at various positions of the boom and at different values of weight lifted cargo, which complicates the calculation of different values Δα and requires its storage in the form of tables or functions FxL α. But given the fact that the type of formula 15 can be pre-set limit when designing a security device using a mathematical model of the crane, these calculations do not represent complexity.

Another way to simplify the configuration is a direct measurement of the deformation of the boom using two or more sensors of the angle of its various parts. In this case, the computation load is used is equivalent to the value of the boom angle, which characterizes the magnitude of the departure of the current value of its length.

When designing a security device, you can also select other calculation formulas for the calculation and subsequent accounting of the tuning parameters that does not matter.

Obviously, the ability to configure the device security without reference loads automatically means about Erki this device without such goods. It is enough to be lifted by crane any cargo and to change the length or angle of the boom. When this value changes the value of the goods displayed on the indicator 5, will be a criterion for the accuracy of the safety device.

To improve the accuracy of the advanced settings can be accessed smoothing of the signals in the channels of the measurement parameters of the crane in dynamic modes. This is a digital computer 1, in particular, by averaging the values of these signals received at intervals, the magnitude of which is set depending on the duration of the transient changes of direction and/or speed of movement of the boom of the crane with the load.

For automatic adjustment of the parameters of the safety devices and, accordingly, increase the accuracy of operation of the device safety and effectiveness of protection of the tap values of the tuning parameters of a digital computer 1 in the automatic mode may be determined periodically at a predetermined time intervals or after a specified number of cycles of lifting and moving cargo. At the same time to avoid the possibility of obtaining values of the tuning parameters with large error values of the tuning parameters, it is advisable to change in small increments, limited is IVA their rapid change.

From the above it follows that the result of the implementation of the distinguishing features of the claimed technical solution is to improve the accuracy configuration of the electronic security device on the crane, the possibility to control the accuracy and correctness of configuration electronic security device on the crane is in its loaded condition without the use of reference or cargo crane scales, as well as improve the protection of crane overload due to the automatic compensation of the drift of electronic security device directly during operation of the crane under load.

Sources of information

1. Sushinsky, VA, Mash D.M., Shishkov N.A. safety Devices cranes. Part 1. - M.: Centre for training and information technology, 1996, p.17.

2. EN 2262481 AND, IPC 7 B66C 15/06, 23/88, 20.10.2005.

3. EN 2005116532 A, MPK7 B66C 1/00, 20.09.2005.

1. The way to configure the electronic security device load-lifting crane, which consists in the regulation of at least one signal in at least one of the channels of direct or indirect measurement of the load, and/or departure, and/or angle of the jib crane of the conditions of the compliance characteristics turn off electronic security device specified GRU the new characteristics of the crane, by addition and/or subtraction and/or division and/or multiplication of this signal at least one signal corresponding to at least one tuning parameter whose value is determined using an electronic security device and store in its non-volatile memory, wherein a value of at least one tuning parameter determined from the condition of ensuring the independence of the direct or indirect measurement of weight lifted and/or moved from the departure and/or boom angle, which carry out lifting the same weight for different values of departure and/or the boom angle or change the angle and/or the length of the boom with a raised load.

2. The method according to claim 1, characterized in that use lifting or moving of cargo with a priori unknown weight, not exceeding the capacity of the crane.

3. The method according to claim 1, characterized in that the dimension of departure is performed with the consideration of bending of the boom, which measure the angles of the arrows not less than two points.

4. The method according to one of claims 1 to 3, characterized in that the measurement of weight lifted and/or moved conduct on at least two different values of departure and/or boom angle, then the value of the at least one tuning parameter is ustanavlivaut the minimum difference of these measurements.

5. The method according to claim 4, characterized in that by means of the operator carry out a visual inspection of the results of measurement of weight lifted and/or moved and installed at least one configuration parameter in manual mode.

6. The method according to one of claims 1 to 3, characterized in that the electronic device security implemented on the basis of the digital computer, with which configuration mode the device or in the operating mode of the load-lifting crane automatically determines the values of the tuning parameters.

7. The method according to claim 6, characterized in that the determination of the values of the tuning parameters in the operating mode of the load-lifting crane is carried out at the change of departure and/or boom angle when the cargo crane.

8. The method according to claim 6 or 7, characterized in that it further carry out the smoothing results of measurement of weight lifted and/or moved in the channel measurement crane load when changing direction and/or speed of his arrows or hauling.

9. The method of one of claims 1 to 3, characterized in that the values of the tuning parameters determined at different values of the length and/or angle of the boom as a function of at least one of these parameters.

10. The method according to one of claims 1 to 3, characterized the eat, the values of the tuning parameters determined from time to time and shall update these values in non-volatile memory of the electronic device security.

11. The method according to claim 10, characterized in that the values of the tuning parameters determined through predetermined intervals of time or after a predefined number of cycles of the lifting/lowering and movement of cargo.

12. An electronic security device that contains sensors operating parameters of the load-lifting crane, the output device and digital computer including at least a microcontroller, non-volatile storage device configured to store values of the tuning parameters, and device input/output information, and non-volatile storage device, and the device input/output information connected to the microcontroller, the input and/or bi-directional I/o device input/output information connected respectively to the outputs or bidirectional inputs/outputs of the sensors parameters crane, the output of the output device connected to at least one Executive unit crane, and at least one input or bidirectional input/output output device connected to at least one more is, output or bidirectional input/output microcontroller or device input/output information, this microcontroller digital computer configured to read from the nonvolatile storage device of the values of the tuning parameters and their addition and/or subtraction and/or multiplication and/or division of the output signals of the sensors parameters crane or signals resulting from the conversion of the output signals of these sensors, characterized in that the digital transmitter is arranged to detect the difference between the results of direct or indirect measurement of weight lifted and/or moved one mass for different values of departure and/or boom angle, determine the value of at least one configuration parameter under condition of providing the minimum value of this difference and write the value of this configuration parameter in non-volatile storage device.

13. The electronic device according to item 12, wherein the digital computer is configured to determine the value of at least one configuration parameter in the process of lifting and/or moving cargo with a priori unknown weight, not exceeding the capacity of the crane, using a mathematical model of the crane is stored in its non-volatile storage device.

14. Electronic device p is 12, characterized in that the sensor operating parameters of the crane contain two or more sensor boom angle, placed not less than two points of arrows, and a digital calculator configured to calculate departure, taking into account the deflection of the boom, which is determined using the output signals of these sensors.

15. An electronic device according to one of PP-14, characterized in that the digital computer made with the possibility of manual input of values of the tuning parameters or automatic detection using microcontroller.

16. An electronic device according to one of PP-14, characterized in that the digital transmitter is arranged to determine the values of the tuning parameters for different values of the length and/or angle of the boom, and non-volatile storage device is configured to be stored in the form of a table or a function of the length and/or angle of the boom.



 

Same patents:

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: lifting and transportation mechanical engineering, namely system for ensuring safety of operation of lifting equipment; possible use for preventing dangerous approach of jib type cranes with telescopic crane arms to power lines.

SUBSTANCE: device for detection of electric field of power line contains an antenna and antenna amplifier, where at least a part of antenna is made in form of flat capacitor mounted on rotary device of crane, and current-conductive plates of flat capacitor are connected to input of antenna amplifier. Positioning of antenna in form of flat capacitor not on the head of crane arm, but on rotary device, ensures safety of crane operation during installation of fly jib, and also results in increased comfort of operation, particularly, low length of communication line and exclusion of drum for winding cable, removing causes for cable tearing under conditions of real applications.

EFFECT: increased efficiency.

2 cl, 4 dwg

FIELD: hoisting and transportation machinery, particularly to control and protect hoisting machines against overload.

SUBSTANCE: system comprises the first control means group installed on support structure or on equipment parts not to be separated from structure. The first control means group includes digital data processing unit 2 having output connected to executive and signaling device 4, 5 units, the first data input-output unit 3 linked to digital data processing unit with two-directional data exchange channel, crane 6 parameter sensors and power supply unit 1. Power supply unit 1 has one clamp connected to load-lifting machine body and another clamp secured to power supply system bus. The second control means group is supported by movable structure or equipment to be demounted and includes crane parameter sensors 10. The first and the second control means groups are linked one to another through two-directional radioline. The first control means group is provided with the first receiving/transmitting radio station, independent power source 15 and switchboard 16.

EFFECT: increased safety system reliability, simplified assemblage and installation thereof on load-lifting machine.

1 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; materials handling facilities.

SUBSTANCE: invention can be used in load-lifting crane control and protection system. Proposed protection system of load-lifting crane contains digital calculator 1, external memory 2, actuator unit 3 and crane parameter pickups 12 - 14. Digital calculator contains boom reach calculating unit 5, unit 6 to calculate load on load-lifting member, torque metering unit 7, three comparators 8, 9 and 10 and OR gate 11. Outputs of crane parameters pickups are connected to first input of digital calculator, and external memory is connected to second input. Corresponding input of actuator unit are connected to first and second outputs. Invention provides safe and effective operation of crane at small reaches owing to disconnection at overloads the motion which might lead to rise of load. Moreover, requirements to accuracy of calculation of load on hook at operation in zone of large reaches are reduced.

EFFECT: simplified production and reduced cost of operation and maintenance of protection system.

2 dwg

FIELD: mechanical engineering: materials handling facilities.

SUBSTANCE: invention can be used in control and safety systems of boom-type load-lifting cranes. Proposed system contains main controller to outputs of which input of emergency signaling module, first control input of travel motion interlock module, dangerous voltage protection unit and maximum height pickup of load grip whose output is connected to information input of main controller. System contains boom head controller and pickup of load grip lowering mechanism, and travel motion interlock module is provided with second and third control inputs. Boom head controller is connected by two-way communication line with dangerous voltage protection unit and is connected with main controller by two-way or wireless data exchange channel. Connected to second and third control inputs of travel motion interlock module are, respectively, maximum height pickup of load grip and pickup of load grip lowering mechanism.

EFFECT: improved safety under abnormal conditions owing to preservation of function of limiting of hook maximum lifting height at interlocking of functional of disconnection of crane travel motion by main controller.

8 cl, 4 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 equipment.

SUBSTANCE: invention relates to overload and damage protection device of load-lifting cranes and pipelayer cranes. Proposed method comes to adjusting at least one signal in load measuring channels and/or reach, and /or angle of boom tilting by adding and/or multiplying said signal with at least one signal corresponding to at least one adjusting parameter whose value is preliminarily determined and kept in nonvolatile memory of safeguard. Signal is adjusted at no load-gripping member of load-lifting crane at zero value of mass of lifted load or load moment in lifting crane load limiting channel. For this purpose value of at least one of said adjusting parameters is determined at no load on load-gripping member of load-lifting crane.

EFFECT: improved accuracy of safeguard and efficiency of protection of load-lifting crane.

10 cl, 1 dwg

FIELD: materials handling facilities.

SUBSTANCE: group of inventions relates to devices for checking condition of safeguards of load-lifting machines and reading parameters of built-in parameters recorders. Proposed method comes to revealing output signals of separate components of safeguard and transmitting signals to control device, processing signals and their recording in control device according to prestored signals determining sequence of processing and recording and forming, by control device, in case of necessity, replacement test signals in compliance with prestored signals determining sequence of forming of replacement test signals and transmitting the latter to separate components of safeguard. Revealing of output signals and forming of replacement test signals is done by receiving and transmitting sequential digital signals by multiplexed communication line at asynchronous or synchronous modes by algorithms specified by sequential protocols. Proposed device to control safeguard of load-lifting machine contains control unit, data input-output module and memory module. Data input-output module is made in form of transceivers of multiplexed communication line CAN, LIN, RS-232, USB or IrDA of interface. Group of invention provides both control of safety of safeguard and reading of data of built-in parameters recorder making it possible to reveal troubles of connecting bundles, control and diagnosing of condition of safeguard directly on load-lifting crane, improve safety of crane at partial failures of safeguard owing to automatic or manual program disconnection and subsequent replacement of any defective functional unit of safeguard without its physical disconnection and without complete disconnection of partially failing safeguard.

EFFECT: improved control of safeguard.

12 cl, 1 dwg

FIELD: materials handling equipment.

SUBSTANCE: invention relates to methods of protection of boom load-lifting cranes and pipelayer cranes from overloads and damage. Adjustment is carried out by lifting calibrated load of preset mass in points of load characteristic with known parameters of boom equipment and regulating signals in load, reach and/or boom tilt angle measuring channels to provide correspondence of safeguard characteristic to preset load characteristic of crane. In process of regulation of signals in load, reach and/or boom tilt angle measuring channels, values of output signals of corresponding sensors are kept constant and regulation is done by adding and/or multiplying output signals from sensors and signals corresponding to adjusting parameters. Values of the latter are preliminarily determined and kept in nonvolatile memory of safeguard.

EFFECT: reduced labor input in adjustment of safeguard on load-lifting crane, provision of interchangeability of all components, possibility of adjustment of device on any type of load-lifting crane with unspecified mounting of load sensor.

6 cl, 2 dwg

FIELD: materials handling equipment.

SUBSTANCE: invention relates to methods of protection of boom load-lifting cranes and pipelayer cranes from overloads and damage. Adjustment is carried out by lifting calibrated load of preset mass in points of load characteristic with known parameters of boom equipment and regulating signals in load, reach and/or boom tilt angle measuring channels to provide correspondence of safeguard characteristic to preset load characteristic of crane. In process of regulation of signals in load, reach and/or boom tilt angle measuring channels, values of output signals of corresponding sensors are kept constant and regulation is done by adding and/or multiplying output signals from sensors and signals corresponding to adjusting parameters. Values of the latter are preliminarily determined and kept in nonvolatile memory of safeguard.

EFFECT: reduced labor input in adjustment of safeguard on load-lifting crane, provision of interchangeability of all components, possibility of adjustment of device on any type of load-lifting crane with unspecified mounting of load sensor.

6 cl, 2 dwg

FIELD: materials handling facilities.

SUBSTANCE: group of inventions relates to devices for checking condition of safeguards of load-lifting machines and reading parameters of built-in parameters recorders. Proposed method comes to revealing output signals of separate components of safeguard and transmitting signals to control device, processing signals and their recording in control device according to prestored signals determining sequence of processing and recording and forming, by control device, in case of necessity, replacement test signals in compliance with prestored signals determining sequence of forming of replacement test signals and transmitting the latter to separate components of safeguard. Revealing of output signals and forming of replacement test signals is done by receiving and transmitting sequential digital signals by multiplexed communication line at asynchronous or synchronous modes by algorithms specified by sequential protocols. Proposed device to control safeguard of load-lifting machine contains control unit, data input-output module and memory module. Data input-output module is made in form of transceivers of multiplexed communication line CAN, LIN, RS-232, USB or IrDA of interface. Group of invention provides both control of safety of safeguard and reading of data of built-in parameters recorder making it possible to reveal troubles of connecting bundles, control and diagnosing of condition of safeguard directly on load-lifting crane, improve safety of crane at partial failures of safeguard owing to automatic or manual program disconnection and subsequent replacement of any defective functional unit of safeguard without its physical disconnection and without complete disconnection of partially failing safeguard.

EFFECT: improved control of safeguard.

12 cl, 1 dwg

Up!