Method of control and registration of load-lifting crane operation

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

 

The invention relates to hoisting and transport machinery and can be used in systems security and control of cranes.

There is a method of monitoring and recording the work of crane, including the measurement of operating parameters, converting the measured values into digital signals, the next recording on the faucet of these signals and the time of their appearance in the long-term non-volatile memory for storing read if necessary, and remote transmission over the radio channel to the terminal located outside the crane, the record received by the terminal signals for storage in the additional nonvolatile memory read if necessary, and processing these signals to detect the presence of violations of the rules of operation of the crane. This method is implemented in the control system and check the work load-lifting crane, a digital data processing unit in the form of a microcontroller that is connected to the remote control, sensors operating parameters of the crane, the display unit, the memory unit and transmitting the radio, and located outside the valve terminal which includes a microcontroller that is connected to the control unit, a display unit, a memory unit and transmitting the radio. The terminal is connected by a line dogstar is na wireless communication with the digital data processing unit and is designed to receive information about the current settings of the crane and write these parameters in long-term non-volatile memory (Registrar settings of a crane) read the information if necessary to detect violations of the rules of operation of the crane and transferred to the crane warning signals to the crane operator and control signals, reducing the maximum permissible values of operating parameters of the crane, or breaking the Executive mechanisms of the crane (see RF patent №2269483, VS 13/18, 20.11.2004). The known method does not provide the required reliability (reliability) monitor and record the operating parameters of the valve due to the use of wired communication lines between the sensors located on the movable elements of the valve and microprocessor. The disadvantage of the system that implements this method is the complexity of its installation on the crane with the use of wired communication lines between the sensors located on the movable elements of the valve and a microprocessor, as well as the considerable complexity of the system configuration at larger sizes (height) of the crane.

There is also known a method of monitoring and recording the work of crane, including the transmission of control commands from an external crane remote control using line two-way wireless communication, measurement of the operating parameters of the crane, converting the measured values into digital signals, determination of the limit load limit provisions of equipment to the Ana and disable its mechanisms, when the actual load on the crane exceeds the allowable value, or when the limit of the provisions of the equipment, the crane control and information signals and the time of their appearance in the long-term non-volatile memory read if necessary, and remote transmission via a wired communication line on the outside of the crane station Supervisory control, registration and storage of data about the operation of the crane. This method is taken as a prototype, implemented in the control system, control and registration of working crane, a digital data processing unit (electronic control unit and control), including the data logger, sensors parameters of the crane, radio transceiver, remote control crane, including the keyboard and the transceiver module, and a digital station Supervisory control, registration and storage of data about the operation of the crane (operator terminal or terminal remote control)connected to a digital data processing unit (see RF patent №2259579, G05B 19/05, 27.08.2005). The known method does not provide the required reliability (reliability) monitor and record the operating parameters of the valve due to the difficulty of transmitting information located on the crane electronic control unit and to the control on the operator's terminal or terminal remote control, located at a relatively great distance from the faucet, using a wired communication line. The disadvantage of the system that implements this method is the complexity of its installation on the crane with the use of wired communication lines between the sensors located on the movable elements of the valve and a microprocessor, as well as the considerable complexity of the system configuration at larger sizes (height) of the crane.

The problem to which the invention is directed, is to develop ways of monitoring and recording the work of crane and system for its implementation, which would provide increased reliability (reliability) monitor and record the operating parameters of the crane. Another objective of the present invention is to reduce the number of wired communication lines serving the system of control and registration of the crane, and the possibility of remote configuration (alignment) of this system by the operator outside of the crane.

The goal of the project is achieved in that in the known method of monitoring and recording the work of crane, including including transmission of control commands from an external crane remote control using line two-way wireless communication, measurement of the operating parameters of the crane, the conversion measured the s values into digital signals, determination of the limit load limit provisions of equipment and crane off its mechanisms, when the actual load on the crane exceeds the allowable value, or when the limit of the provisions of the equipment, the crane control and information signals and the time of their appearance in the long-term non-volatile memory read if necessary, and remote transfer on the outside of the crane station Supervisory control, registration and storage of data about the operation of the crane, according to the invention additionally on command from the remote control is passed to it recorded on the crane information and control signals and record these signals in non-volatile memory of the remote control read if necessary by signaling to the station Supervisory control, registration and storage of data about the operation of the crane, at the same time to transmit all signals use two-way wireless communication lines.

With respect to the system that implements the proposed method, the goal of the project is achieved in that in a control system of a crane with the control and registration of his work, containing digital data processing unit connected to the sensor pairs is m crane, Registrar settings of the crane and transceiver radio, remote control, including a keyboard and a radio transceiver, and digital station Supervisory control, registration and storage of data about the operation of the crane, according to the invention, the remote control is connected by lines two-way wireless communication with the sensors parameters of the crane and digital station dispatch recording and storing data and configured to issue additional control commands to the sensor parameters of the crane for the alignment system and to receive information about the current settings of the crane and its records, and transfer the received information to the digital station Supervisory control, registration and storage of data crane, with the sensors parameters of the crane and digital station dispatch recording and storing data about the operation of the crane is equipped with an additional way radios, and all transceiver modules of the system are connected by radio communication, forming a wireless serial line interface.

In addition, the remote control is further provided with a block identification unit information readout unit system configuration and unit recording information, and the output unit driven by the I is connected through the identification block to the inputs of blocks read system configuration and account information, the outputs of blocks in the system configuration and unit recording information connected to the inputs of the transceiver of the radio remote control and the unit reading the information connected to a specific wireless LAN using two-way communication link.

This embodiment of the control system and check the work load-lifting crane provides the ability to:

remote configuration (alignment) of this system and its separate elements by the operator outside of the crane;

online obtain necessary information about the execution of the commands entered from the keyboard of the remote control;

additional (control) registration data of the crane on the remote control;

additional transfer (if necessary) data about the operation of the crane with a remote control station of dispatch, reception and storage of data in order to control the operation of the equipment of the crane.

The technical result from the use of the invention is to enhance reliability (reliability) monitoring and recording of operating parameters of the load-lifting crane.

The drawing shows a functional diagram of the control system and check the work load-lifting crane that implements the proposed method.

Systemasterisk group of sensors parameters of the crane, installed on its equipment (in the drawing, in particular, shows four sensor 1-4), and installed in the cab of the crane digital block 5 data containing in its composition Registrar 6 parameters of the crane. Sensors 1-4 and digital unit equipped with 5-way radios 7-11 and ensure the functioning of the security system, protecting the valve against overloading and invalid moves his equipment. The number of sensors depends on the hardware configuration of the crane.

To monitor the condition and operation of the crane, reception of the operative information and long-term storage of its operational characteristics, the system includes a digital station 12 dispatch, reception and storage located outside of the crane on site, also equipped with a radio transceiver 13.

To ensure system configuration, reading of the Registrar 6 parameters of the crane and transfer of control commands and information the system contains a remote control 14 remote control includes a control unit 15, block 16 device identification system, unit 17 of the information readout unit 18 system configuration, unit 19 records the information and the radio transceiver 20. The output control unit 15 is connected through the block 16 to identify the input unit 17 reads the information block 1 system configuration and unit 19 records the information. The outputs of block 18 system configuration and unit 19 records the information connected to the inputs of the radio module 20, and the block 17 reading information connected to the LAN 20 via two-way communication link.

In the proposed system, the blocks are made as follows.

Sensors 1-4 parameters of the crane contain primary converters of physical parameters (force, pressure, angular and linear displacements, etc. into an electric signal (analog, discrete, digital) and PIC-processor to convert the signal in the serial code.

Digital block 5 data processing is a PIC processor with a standard set of elements, including analog-to-digital Converter, a multiplexer, a storage device, parallel and serial ports, etc. It is equipped with amplifiers for connecting actuators not shown) and the Registrar of the 6 parameters of the crane. For the implementation of digital block 5, you can use the MSP430F149 microprocessor firm Texas Instruments (USA) or other microprocessors of this type.

Digital station 12 dispatch, reception and storage is a personal electronic computer (PC) with a standard set of blocks, providing requests, receiving and storing information. Station 12 may be the same group who runs, located on the site.

The remote control 14 remote control is a portable device and consists of a control unit 15 in the form of a set of switches (keyboard)to select the operation mode (the transmission direction information), the output of which is connected to the block 16 device identification system that provides the encoding commands in accordance with the selected direction.

Blocks 17-19 represent a logical device that provides the exchange of information, respectively:

- digital block 5 data (readout);

- digital block 5 data processing and sensors 1-4 (system setup);

- with digital station 12 (the recording of information in the PC).

All the units are identified by their unique identification code. Data transfer is carried out parcels, representing a command to be executed, which contains the code executes the command, the device code, data, checksum.

Transceiver radios 7-11, 13 and 20 are each FSK transceiver (e.g., integrated single-chip transceiver GE)providing a bi-directional half-duplex communication with fast frequency hopping and NRZ coding, as well as to create a multi-channel FSK transceiver.

p> The system works as follows.

During the initial installation of the system is its setting (adjustment) on the crane to minimize errors as the system itself (primarily the sensors and nodes of their installation), and errors caused by the deviation of the crane from the calculated values.

Unit 5 data includes electromagneticwave storage device, in which when configured from console 14 are recorded as estimated (or measured external measuring devices high precision) values of monitored parameters and the corresponding parameters determined by the sensor signals 1-4. Based on these data, we calculate the correction to the readings of the sensors, measured in operating system mode. A crane, which is controlled by sensors that are part of the system, is installed in a number of positions, which are measured by these sensors and the Adjuster on command from the remote control 14 (channel block 18 settings) and stored in memory unit 5 of the data processing. Then, in the memory unit 5 writes the actual value of the parameter.

Similarly configured channel load cell (force or pressure), which is suspended on the hook known (calibration) the goods and to the memory unit 5 information is written to the load cell in which the effects of the calibration load and the actual load value.

Thus, in block 5 recorded data to calculate amendments and correction of sensor readings. All amendments are stored in block 5 during the entire time of operation of the crane (or until re-alignment).

After that, the Adjuster from the remote control 14 translates the system setup mode of operation in which the block 5 data processing in accordance with its program polls the sensors 1-4, processes the data and creates the control and information signals, depending on the ratio of actual and valid indicators of the crane. At the same time the performance recorded in the recorder 6.

Reading information from the Registrar 6 can be made on request digital station 12, but can be made directly from the remote control 14 (channel block 17). In block 17, the reading is recorded telemetry data, which recorded information about the inclusions mechanisms, current settings and duration of operations performed by the crane during the last hours, as well as operational parameters, which are recorded accumulated total. If necessary this information from the remote control 14 to the channel unit 19 can be transferred to digital station 12.

All considered modes are performed remotely over the air service engineer (operator), located on the convenient d is I the workplace in relation to the crane.

The proposed system of control and registration of the operation of loading crane can be manufactured industrially by the instrument-making enterprise with the use of modern electronic components and technology.

Method of monitoring and recording the work of crane, including the transmission of control commands from an external crane remote control using line two-way wireless communication, measurement of the operating parameters of the crane, converting the measured values into digital signals, determination of the limit load limit provisions of equipment and crane off its mechanisms, when the actual load on the crane exceeds the allowable value, or when the limit of the provisions of the equipment, the crane control and information signals and the time of their appearance in the long-term non-volatile memory read if necessary, and remote transfer on the outside of the crane station dispatch registration and storage of data about the operation of the valve, characterized in that it further command from the remote control is passed to it recorded on the crane information and control signals and record these signals in non-volatile memory of the bullets is as remote control with the ability to read, if necessary, by signaling to the station Supervisory control registration and storage of data about the operation of the crane, at the same time to transmit all signals use two-way wireless communication lines.



 

Same patents:

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: 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: transportation.

SUBSTANCE: device contains the boom equipment load and spatial position pickups, the output device, the graphic display with the graphic memory unit and the processor connected with the said pickups, graphic display and output device connected to crane actuators. The processor generates a schematic image of the crane and its operating area on the screen of the graphic display. In the first version of the device, the processor produces a dynamic image on the display of the crane operating area proceeding from the necessity to prevent the crane overload and its collisions with obstacles. In other versions of the device, the operating area is generated on the display by the signals received from outside moving or stationary objects using the crane operating area locator signals, using boom equipment extreme coordinates in motion and/or signals generated by operator acting on the sensor display screen capable to output 3D images.

EFFECT: higher safety of the load-lifting crane operation.

20 cl, 2 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: technological processes.

SUBSTANCE: method includes determination of crane equipment position and estimation of weight gripping device load, initiation of crane equipment movements by operator and disconnection of equipment crane drives in case of overload. Before crane equipment position is determined, coordinates of obstacles on the site are memorized. Contours of obstacles are formed in the memory of processor and are represented on the display, and basing on the signals of crane equipment position sensors the coordinates of initial position of weight gripping device are determined, coordinates of final position of weight gripping device are set, then memorized and displayed. When crane operator initiates crane equipment movements, expected trajectory of weight gripping device is defined and displayed. If no contours cross, directions of crane equipment independent movements are determined, every one separately, for delivery of weight gripping device into the final destination point along the shortest route in the shortest time period, and in case of obstacles contours crossing by expected trajectory of weight gripping device movement, the optimal trajectory is determined, memorized and displayed. Movement of weight gripping device is done in loads bouncing suppression modes, overload crane protection and obstacles collision protection modes, under weight gripping device movement speed reduction with further braking and movements block. Device contains processors, "n" crane equipment position sensors, load detector, unit of obstacles coordinates setting and setter of final coordinates of weight gripping device, display, and drive control unit.

EFFECT: reduces dynamic loads and increases safety.

7 cl, 2 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; 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: 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; lifting and transportation equipment.

SUBSTANCE: invention relates to protection devices for load-lifting machines used in construction engineering. According to proposed method, by successive polling of signals of first complex of pickups by data processing base unit and by transmitting of commands through drum with current carrying ring to controller of extendable part for connection of technical devices and receiving information from second complex of pickups, drives of load-lifting machine mechanisms are switched off when actual characteristics exceed tolerable values. Provision is made for connecting current-carrying ring of drum through marker light switch of one terminal of supply source whose second terminal is connected with metal structure of load-lifting machine.

EFFECT: enlarged functional capabilities of load-lifting machine, provision of convenient and reliable transmission of commands for selective connection of devices arranged on extendable part and reception of information from pickups arranged on said part.

7 cl, 2 dwg

FIELD: mechanical engineering; material handling machinery.

SUBSTANCE: proposed method includes measuring or crane loads, traveling of crane with load and time of operation of crane mechanisms, recording of data and comparing them with normal characteristics of crane. In process o measurement, crane operating cycle is found. Beginning of cycle is determined by switching on any other mechanism after switching on load lifting mechanism at G>Gnl and L>Lnl where G is actual load from load on crane hook, Gnl is load at no load on crane hook, ZL is displacement of center of gravity of hook casing relative to center of gravity of load, Lnl is maximum tolerable displacement of center of gravity of hook casing relative to center of gravity of load. End of cycle is found by beginning of following cycle after execution of load lifting in case of no load on crane hook at G>Gnl and operation of any mechanism of horizontal displacement of load at L>Lnl. Simultaneously with determination of beginning and end of cycle, load G is measured at beginning of load lifting in period from moment of exceeding of load Gnl to moment of switching on any other load horizontal displacement mechanism. Current mean value of load is calculated within time interval Δt. Maximum value of current mean load is determined also within said period. Basing on maximum value of current mean load, mass of load is determined, and crane cycle with obtained mass of load is recorded. Then cycles with corresponding load masses are summed up. According to obtained data crane is classified to group of class, data obtained in each group of class are compared with normal characteristics of crane according to specifications and , basing of results on comparing, crane is placed in operation, or crane operator is warned or operation of crane is prohibited. Proposed device contains sensors of load and horizontal displacements, processing unit and comparing unit. Device includes also crane operation cycle revealing unit, cycle recording unit, load mass metering unit, AND and OR units and crane state evaluation unit.

EFFECT: provision of reliable data on conditions of crane, improved safety.

3 cl, 1 dwg

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