CN115465798A - Automatic control system for preventing swing of tower crane - Google Patents
Automatic control system for preventing swing of tower crane Download PDFInfo
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- CN115465798A CN115465798A CN202211262041.9A CN202211262041A CN115465798A CN 115465798 A CN115465798 A CN 115465798A CN 202211262041 A CN202211262041 A CN 202211262041A CN 115465798 A CN115465798 A CN 115465798A
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- resistor
- module
- control module
- power tube
- swing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
- B66C13/063—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses an anti-swing automatic control system of a tower crane, which relates to the technical field of motor control and comprises a power supply rectification protection frequency conversion module, a control module and a control module, wherein the power supply rectification protection frequency conversion module is used for rectification, protection and inversion frequency conversion control; the function control module is used for outputting a control instruction through the touch screen circuit; the swing detection module is used for detecting the swing degree of the hung object; the intelligent control module is used for receiving signals and controlling the module to work; the sampling holding comparison module is used for holding the swing signal and performing threshold comparison; the pulse control module is used for generating and adjusting pulse signals; and the motor control module is used for adjusting the speed of the motor. According to the automatic control system for preventing the tower crane from swinging, the function control module provides a control instruction for the intelligent control module in a touch screen circuit mode so as to control the intelligent control module up and down, left and right, and meanwhile, the swinging degree of a hung object is monitored and compared and judged in real time, the conduction degree of the motor control module is determined according to the swinging force, and the working speed of the motor is controlled.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to an anti-swing automatic control system for a tower crane.
Background
In recent years, city construction is rapidly developed, high-rise buildings become the main development direction, a tower crane is a very important hoisting machine in building construction and is indispensable in building construction, the tower crane can be divided into a fixed type and a movable type according to different specific erection places, when the traditional tower crane operates, the actual working effect and the service life of the crane are influenced due to the fact that a used control circuit is insufficient in the aspect of specific application reliability, the traditional tower crane needs more control keys to realize the control of the crane, a control circuit is complex, and when the tower crane operates, the condition that a hoisted object swings due to the influence of external factors and the influence of the quality of the hoisted object has great potential safety hazard, and therefore the improvement is needed.
Disclosure of Invention
The embodiment of the invention provides an anti-swing automatic control system for a tower crane, which aims to solve the problems in the background technology.
According to the embodiment of the invention, the anti-swing automatic control system of the tower crane is provided, and comprises the following components: the device comprises a power supply rectification protection frequency conversion module, a motor module, a function control module, a swing detection module, an intelligent control module, a sample-hold comparison module, a pulse control module and a motor control module;
the power supply rectification protection frequency conversion module is used for carrying out three-phase rectification processing on input electric energy, consuming feedback energy generated when the motor module works, and carrying out inversion frequency conversion control on the rectified electric energy and outputting the electric energy;
the motor module is connected with the power supply rectification protection frequency conversion module and used for receiving the electric energy output by the power supply rectification protection frequency conversion module and controlling the work of a crane motor;
the function control module is connected with the intelligent control module and used for outputting a function control instruction of moving up and down and left and right through a touch screen circuit;
the swing detection module is connected with the intelligent control module and is used for detecting the swing degree of the hoisted object in the moving process in real time and outputting a swing signal;
the intelligent control module is used for receiving the signals output by the function control module and the swing detection module, controlling and outputting corresponding first pulse signals through input function control instructions, controlling the work of the power supply rectification protection frequency conversion module and the pulse control module, and outputting control signals and controlling the work of the sampling protection comparison module;
the sampling, holding and comparing module is connected with the intelligent control module and the swing detection module, is used for receiving the control signal, performing sampling, holding and processing on the swing signal, and is used for comparing the held signal with the swing signal detected in real time;
the pulse control module is connected with the swing detection module and the sampling holding comparison module, and is used for generating a second pulse signal and receiving the swing signal and adjusting the duty ratio of the second pulse signal;
the motor control module is connected with the intelligent control module, the pulse control module and the motor module, and is used for adjusting the three-phase electric energy input to the motor module through the power tube circuit and adjusting the working speed of the motor module.
Compared with the prior art, the invention has the beneficial effects that: according to the automatic control system for preventing the swing of the tower crane, the function control module provides a control instruction for the intelligent control module in a touch screen circuit mode, so that the touch screen circuit can control the tower crane to move up and down, left and right, the swing detection module detects the swing degree of a lifted object, the sampling protection comparison module is matched to maintain the initial swing force and compare the initial swing force with the changed swing force, the state of the lifted object is monitored in real time, the conduction degree of the motor control module is determined according to the swing force, the working speed of the motor module is reduced, the quick protection work is achieved, complex programs and calculations are not needed, and the control system is simple, convenient and easy to operate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a principle of an anti-swing automatic control system of a tower crane according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of an automatic control system for preventing swing of a tower crane according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of the connection of the wobble detection module, the sample-hold comparison module, and the pulse control module according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In embodiment 1, referring to fig. 1, an automatic control system for preventing a tower crane from swinging includes: the device comprises a power supply rectification protection frequency conversion module 1, a motor module 2, a function control module 3, a swing detection module 4, an intelligent control module 5, a sample-hold comparison module 6, a pulse control module 7 and a motor control module 8;
specifically, the power supply rectification protection frequency conversion module 1 is used for performing three-phase rectification processing on input electric energy, consuming feedback energy generated when the motor module 2 works, and performing inversion frequency conversion control and output on the rectified electric energy;
the motor module 2 is connected with the power supply rectification protection frequency conversion module 1 and used for receiving the electric energy output by the power supply rectification protection frequency conversion module 1 and controlling the crane motor to work;
the function control module 3 is connected with the intelligent control module 5 and used for outputting function control instructions of up-down, left-right movement through a touch screen circuit;
the swing detection module 4 is connected with the intelligent control module 5 and is used for detecting the swing degree of the hoisted object in the moving process in real time and outputting a swing signal;
the intelligent control module 5 is used for receiving the signals output by the functional control module 3 and the swing detection module 4, controlling and outputting corresponding first pulse signals through input functional control instructions, controlling the work of the power supply rectification protection frequency conversion module 1 and the pulse control module 7, and outputting control signals and controlling the work of the sampling protection comparison module;
the sampling, holding and comparing module 6 is connected with the intelligent control module 5 and the swing detection module 4, and is used for receiving the control signal, performing sampling, holding and processing on the swing signal, and comparing the held signal with the swing signal detected in real time;
the pulse control module 7 is connected with the swing detection module 4 and the sample-hold comparison module 6, and is used for generating a second pulse signal and receiving the swing signal and adjusting the duty ratio of the second pulse signal;
and the motor control module 8 is connected with the intelligent control module 5, the pulse control module 7 and the motor module 2, and is used for adjusting the three-phase electric energy input into the motor module 2 through a power tube circuit and adjusting the working speed of the motor module 2.
In a specific embodiment, the intelligent control module 5 may employ a micro control circuit and a driving circuit, the micro control circuit completes receiving signals and outputting pulse signals and control signals, the driving circuit completes improving driving capability of the pulse signals, the micro control circuit may employ, but is not limited to, a microcontroller such as a single chip microcomputer and a DSP, and the driving circuit may employ a special IGBT driver, which is not described herein; the motor control module 8 can be used as a walking motor, a rotary motor, a variable amplitude motor and a main hook motor, and is respectively controlled by the power supply rectification protection frequency conversion module 1 and the intelligent control module 5, which is not described in detail herein.
Further, the power rectification protection frequency conversion module 1 includes a power port, a three-phase rectifier T1, a first power tube Q1, a first resistor R1, a first capacitor C1, a second resistor R2, a second power tube Q2, a second capacitor C2, and a frequency converter G1;
specifically, the output end of the power port is connected to the input end of a three-phase rectifier T1, the first output end of the three-phase rectifier T1, the collector of a first power tube Q1, one end of a second capacitor C2 and the first input end of a frequency converter G1, the emitter of the second power tube Q2 is connected to one end of a second resistor R2 and one end of the first capacitor C1 through a first resistor R1, the other end of the first capacitor C1 is connected to the second output end of the three-phase rectifier T1, the emitter of the second power tube Q2 and the other end of the second capacitor C2, the other end of the second resistor R2 is connected to the collector of a second power switch, the gate of the first power tube Q1, the gate of the second power tube Q2 and the control end of the frequency converter G1 are all connected to the intelligent control module 5, and the first output end, the second output end and the third output end of the frequency converter G1 are all connected to the motor module 2.
In a specific embodiment, the first power tube Q1 and the second power tube Q2 may both be IGBT chips; the second capacitor C2 is a small-capacity non-inductive capacitor, and is used for absorbing a peak voltage generated when the frequency converter G1 is switched on and off; the first power tube Q1, the first resistor R1, the second resistor R2, the second power tube Q2, and the second capacitor C2 form a switched capacitor branch for absorbing feedback energy generated by the motor module 2 during operation.
Further, the function control module 3 includes a control terminal interface, a first power VCC1, and a converter U1;
specifically, the output end of the control end interface is connected with the second end, the third end, the fourth end and the fifth end of the converter U1 respectively, the first end, the ninth end and the tenth end of the converter U1 are connected with the first power VCC1, the sixth end of the converter U1 is grounded, and the twelfth end, the fourteenth end, the fifteenth end and the sixteenth end of the converter U1 are connected with the intelligent control module 5 respectively.
In a specific embodiment, the control terminal interface is used for connecting a touch screen circuit and completing output of a control instruction through the touch screen circuit; the converter U1 can be ADS7843 chip.
Further, the motor control module 8 includes a sixth power transistor Q6, a third power transistor Q3, a fourth power transistor Q4, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;
specifically, the grid of the sixth power tube Q6, the grid of the third power tube Q3, and the grid of the fourth power tube Q4 are all connected to the intelligent control module 5 and the pulse control module 7, the collector of the sixth power tube Q6, the collector of the third power tube Q3, and the collector of the fourth power tube Q4 are respectively connected to the first end, the second end, and the third end of the frequency converter G1, the emitter of the sixth power tube Q6 is grounded through a third resistor R3, the emitter of the third power tube Q3 is grounded through a fourth resistor R4, and the emitter of the fourth power tube Q4 is grounded through a fifth resistor R5.
In a specific embodiment, the sixth power tube Q6, the third power tube Q3, and the fourth power tube Q4 may all adopt IGBT components; the third resistor R3, the fourth resistor R4 and the fifth resistor R5 are used for consuming the input electric energy.
Further, the swing detection module 4 includes a swing sensor U2, a sixth resistor R6, a seventh resistor R7, a first operational amplifier OP1, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10;
specifically, the first output end of the swing sensor U2 is connected to the inverting end of the first operational amplifier OP1 and one end of the eighth resistor R8 through the sixth resistor R6, the second output end of the swing sensor U2 is connected to the non-inverting end of the first operational amplifier OP1 and one end of the ninth resistor R9 through the seventh resistor R7, the other end of the ninth resistor R9 is grounded, the other end of the eighth resistor R8 is connected to the output end of the first operational amplifier OP1 and the first end of the tenth resistor R10, and the second end of the tenth resistor R10 is connected to the sample-hold comparison module 6.
In a specific embodiment, the first operational amplifier OP1 may perform a differential amplification process by using an OP07 operational amplifier.
Further, the sample-hold comparison module 6 includes a second operational amplifier OP2, a fifth power tube Q5, an eleventh resistor R11, a third capacitor C3, a thirteenth resistor R13, and a third operational amplifier OP3;
specifically, the in-phase end of the second operational amplifier OP2 is connected to the second end of the tenth resistor R10, the inverting end of the second operational amplifier OP2 is connected to the inverting end of the third operational amplifier OP3 and the output end of the third operational amplifier OP3 through the eleventh resistor R11, the in-phase end of the third operational amplifier OP3 is connected to the drain of the fifth power transistor Q5 and to one end of the thirteenth resistor R13 through the third capacitor C3, the other end of the thirteenth resistor R13 is grounded, the gate of the fifth power transistor Q5 is connected to the intelligent control module 5, and the source of the fifth power transistor Q5 is connected to the output end of the second operational amplifier OP 2.
In a specific embodiment, the second operational amplifier OP2 and the third operational amplifier OP3 may both be OP07 operational amplifiers; the fifth power tube Q5 may be an N-channel junction field effect tube; the third capacitor C3 and the thirteenth resistor R13 are used for holding the sampled data.
Further, the sample-hold comparing module 6 further includes a first comparator A1, a sixteenth resistor R16, a second power source VCC2, and an analog switch U4;
specifically, the in-phase end of first comparator A1 is connected the second end of tenth resistance R10, and the inverting terminal of first comparator A1 is connected the output that OP3 was put to the third fortune, and the fifth end of analog switch U4 and connect second power VCC2 through sixteenth resistance R16 are connected to the output of first comparator A1, and analog switch U4's fourth end is connected the grid of sixth power tube Q6, and analog switch U4's third end is connected pulse control module 7.
In a specific embodiment, the first comparator A1 may be an LM393 comparator; the analog switch U4 can be a CD4066 chip.
Further, the pulse control module 7 includes a first diode D1, a first potentiometer RP1, a fourteenth resistor R14, a fourth capacitor C4, a pulse generator U3, a fifth capacitor C5, a fifteenth resistor R15, a third power source VCC3, and a twelfth resistor R12;
specifically, the third power VCC3 is connected to the fourth end and the eighth end of the pulse generator U3 and is connected to one end of the first potentiometer RP1 through a fifteenth resistor R15, the slip end of the first potentiometer RP1 is connected to the cathode of the first diode D1 and is connected to the second end of the tenth resistor R10 through a twelfth resistor R12, the anode of the first diode D1 is connected to the seventh end of the pulse generator U3, the other end of the first potentiometer RP1 is connected to the fourth capacitor C4, the second end and the sixth end of the pulse generator U3 through a fourteenth resistor R14, the fifth end of the pulse generator U3 is connected to the first end of the pulse generator U3, the other end of the fourth capacitor C4 and the ground through a fifth capacitor C5, and the third end of the analog switch U4 is connected to the third end of the pulse generator U3.
In a specific embodiment, the pulse generator U3 may be an NE555 chip.
The invention relates to an automatic control system for preventing swinging of a tower crane, which is characterized in that a power port is connected with a power supply to provide required three-phase electric energy, a three-phase rectifier T1 is used for rectifying treatment, a frequency converter G1 is used for regulating and controlling through an intelligent control module 5 so as to regulate the working speed of a motor module 2 and control the moving speed of a lifted object, a function control module 3 is used for providing a control instruction for the intelligent control module 5 through a touch screen circuit so as to control the work of a walking motor, a rotary motor, an amplitude motor and a main hook motor conveniently through the intelligent control module 5, the swinging degree of the lifted object is detected by a swinging sensor U2, a first operational amplifier OP1 is used for carrying out differential amplification treatment on a swinging signal, the swinging signal is kept through a second operational amplifier OP2 and a third operational amplifier OP3 to obtain the initial swinging degree of the lifted object, the kept swinging signal is compared with a real-time swinging signal, when deviation occurs, the first comparator A1 outputs a high level control to simulate the conduction of a switch U4, meanwhile, a voltage value output by a pulse generator U3 is used for reducing the working speed of the intelligent generator, the pulse generator output of the pulse generator, the pulse generator is controlled by a seventh operational control module 8, and the pulse generator, the pulse generator is used for reducing the duty ratio of the pulse generator, and the control module, and the output of the pulse generator, and the pulse generator is reduced by the operational control module, and the operational control module 3, and the operational control module.
This automatic control system that sways is prevented to tower machine adopts the mode of touch-sensitive screen circuit to provide control command for intelligent control module 5 by function control module 3, so that by the upper and lower side-to-side motion of touch-sensitive screen circuit control tower crane, simultaneously by swaying detection module 4 to being hung the degree of swaying of thing and detecting, cooperation sampling protection comparison module keeps initial rocking force, and compare with the rocking force after the change, carry out state real-time supervision to being hung the thing, and by the size decision motor control module 8's of rocking force conduction degree, so as to reduce motor module 2's operating rate plays the work of quick protection, and need not comparatively complicated procedure and calculation, makes control system comparatively simple and easy.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An automatic control system for preventing the tower crane from swinging is characterized in that,
this tower machine anti-swing automatic control system includes: the device comprises a power supply rectification protection frequency conversion module, a motor module, a function control module, a swing detection module, an intelligent control module, a sampling holding comparison module, a pulse control module and a motor control module;
the power supply rectification protection frequency conversion module is used for carrying out three-phase rectification processing on input electric energy, consuming feedback energy generated by the motor module during working, and carrying out inversion frequency conversion control and output on the rectified electric energy;
the motor module is connected with the power supply rectification protection frequency conversion module and used for receiving the electric energy output by the power supply rectification protection frequency conversion module and controlling the work of a crane motor;
the function control module is connected with the intelligent control module and used for outputting a function control instruction of moving up and down and left and right through a touch screen circuit;
the swing detection module is connected with the intelligent control module and is used for detecting the swing degree of the hoisted object in the moving process in real time and outputting a swing signal;
the intelligent control module is used for receiving the signals output by the function control module and the swing detection module, controlling and outputting corresponding first pulse signals through input function control instructions, controlling the work of the power supply rectification protection frequency conversion module and the pulse control module, and outputting control signals and controlling the work of the sampling protection comparison module;
the sampling, holding and comparing module is connected with the intelligent control module and the swing detection module, is used for receiving the control signal, performing sampling, holding and processing on the swing signal, and is used for comparing the held signal with the swing signal detected in real time;
the pulse control module is connected with the swing detection module and the sampling holding comparison module, and is used for generating a second pulse signal and receiving the swing signal and adjusting the duty ratio of the second pulse signal;
the motor control module is connected with the intelligent control module, the pulse control module and the motor module, and is used for adjusting the three-phase electric energy input to the motor module through the power tube circuit and adjusting the working speed of the motor module.
2. The automatic control system for preventing the tower crane from swinging as claimed in claim 1, wherein the power supply rectification protection frequency conversion module comprises a power supply port, a three-phase rectifier, a first power tube, a first resistor, a first capacitor, a second resistor, a second power tube, a second capacitor and a frequency converter;
the output end of the power port is connected with the input end of the three-phase rectifier, the first output end of the three-phase rectifier, the collector electrode of the first power tube, one end of the second capacitor and the first input end of the frequency converter, the emitter electrode of the second power tube is connected with one end of the second resistor and one end of the first capacitor through the first resistor, the other end of the first capacitor is connected with the second output end of the three-phase rectifier, the emitter electrode of the second power tube and the other end of the second capacitor, the other end of the second resistor is connected with the collector electrode of the second power switch, the grid electrode of the first power tube, the grid electrode of the second power tube and the control end of the frequency converter are all connected with the intelligent control module, and the first output end, the second output end and the third output end of the frequency converter are all connected with the motor module.
3. The automatic control system for preventing the tower crane from swinging as claimed in claim 1, wherein the function control module comprises a control terminal interface, a first power supply and a converter;
the output end of the control end interface is connected with the second end, the third end, the fourth end and the fifth end of the converter respectively, the first end, the ninth end and the tenth end of the converter are connected with a first power supply, the sixth end of the converter is grounded, and the twelfth end, the fourteenth end, the fifteenth end and the sixteenth end of the converter are connected with the intelligent control module respectively.
4. The automatic control system for preventing the tower crane from swinging as claimed in claim 2, wherein the motor control module comprises a sixth power tube, a third power tube, a fourth power tube, a third resistor, a fourth resistor and a fifth resistor;
the grid electrode of the sixth power tube, the grid electrode of the third power tube and the grid electrode of the fourth power tube are connected with the intelligent control module and the pulse control module, the collector electrode of the sixth power tube, the collector electrode of the third power tube and the collector electrode of the fourth power tube are respectively connected with the first end, the second end and the third end of the frequency converter, the emitter electrode of the sixth power tube is grounded through a third resistor, the emitter electrode of the third power tube is grounded through a fourth resistor, and the emitter electrode of the fourth power tube is grounded through a fifth resistor.
5. The automatic control system for preventing the tower crane from swinging as claimed in claim 4, wherein the swinging detection module comprises a swinging sensor, a sixth resistor, a seventh resistor, a first operational amplifier, an eighth resistor, a ninth resistor and a tenth resistor;
the first output end of the swing sensor is connected with the inverting end of the first operational amplifier and one end of the eighth resistor through the sixth resistor, the second output end of the swing sensor is connected with the inverting end of the first operational amplifier and one end of the ninth resistor through the seventh resistor, the other end of the ninth resistor is grounded, the other end of the eighth resistor is connected with the output end of the first operational amplifier and the first end of the tenth resistor, and the second end of the tenth resistor is connected with the sampling, holding and comparing module.
6. The automatic control system for the anti-swing of the tower crane according to claim 5, wherein the sample-hold comparison module comprises a second operational amplifier, a fifth power tube, an eleventh resistor, a third capacitor, a thirteenth resistor and a third operational amplifier;
the in-phase end of the second operational amplifier is connected with the second end of the tenth resistor, the inverting end of the second operational amplifier is connected with the inverting end of the third operational amplifier and the output end of the third operational amplifier through the eleventh resistor, the in-phase end of the third operational amplifier is connected with the drain electrode of the fifth power tube and is connected with one end of the thirteenth resistor through the third capacitor, the other end of the thirteenth resistor is grounded, the grid electrode of the fifth power tube is connected with the intelligent control module, and the source electrode of the fifth power tube is connected with the output end of the second operational amplifier.
7. The automatic control system of claim 6, wherein the sample-hold comparison module further comprises a first comparator, a sixteenth resistor, a second power supply and an analog switch;
the in-phase end of the first comparator is connected with the second end of the tenth resistor, the inverting end of the first comparator is connected with the output end of the third operational amplifier, the output end of the first comparator is connected with the fifth end of the analog switch and is connected with the second power supply through the sixteenth resistor, the fourth end of the analog switch is connected with the grid electrode of the sixth power tube, and the third end of the analog switch is connected with the pulse control module.
8. The automatic control system for preventing tower crane from swinging as claimed in claim 7, wherein said pulse control module comprises a first diode, a first potentiometer, a fourteenth resistor, a fourth capacitor, a pulse generator, a fifth capacitor, a fifteenth resistor, a third power supply and a twelfth resistor;
the third power supply is connected with the fourth end and the eighth end of the pulse generator and is connected with one end of the first potentiometer through a fifteenth resistor, the slip sheet end of the first potentiometer is connected with the cathode of the first diode and is connected with the second end of the tenth resistor through a twelfth resistor, the anode of the first diode is connected with the seventh end of the pulse generator, the other end of the first potentiometer is connected with the fourth capacitor, the second end and the sixth end of the pulse generator through a fourteenth resistor, the fifth end of the pulse generator is connected with the first end of the pulse generator, the other end of the fourth capacitor and the ground end through a fifth capacitor, and the third end of the pulse generator is connected with the third end of the analog switch.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117254722A (en) * | 2023-11-16 | 2023-12-19 | 深圳市国方科技有限公司 | Variable frequency switch control protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254722A (en) * | 2023-11-16 | 2023-12-19 | 深圳市国方科技有限公司 | Variable frequency switch control protection circuit |
| CN117254722B (en) * | 2023-11-16 | 2024-02-23 | 深圳市国方科技有限公司 | Variable frequency switch control protection circuit |
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