Detection system of distributed power supply access unit

Abstract

The invention discloses a detection system for a distributed power supply access unit, and the system comprises an upper computer which is used for controlling the test process and automatic test of the distributed power supply access unit; the front-end processor is used for performing function regulation and control on each module according to the control instruction of the upper computer; the program control voltage source is used for providing required electric energy for the tested distributed power supply access unit; the station connection module is used for automatically connecting a power supply interface of the tested distributed power supply access unit; the complete machine power consumption test module is used for measuring the complete machine power consumption value of the tested distributed power supply access unit; the station control module is used for controlling meter position electric energy input and on-off of a signal channel; the on-load capacity test module is used for measuring the on-load capacity of the tested distributed power supply access unit interface; the test interface is used for connecting an alignment interface of the tested distributed power supply access unit to the station control module and the complete machine power consumption test module; and the test meter position is used for installing the tested distributed power supply access unit.

Description

Technical Field

[0001] The present invention relates to the technical field of power consumption information collection system detection, and more specifically, to a detection system for a distributed power supply access unit. Background Art

[0002] In the power consumption information collection system, the distributed power access unit is the core device for inverter data protocol conversion, which is used to solve the data interaction problem between the different communication protocols of the collection system and the distributed photovoltaic system. The communication between the distributed power access unit and the inverter involves two aspects: interface and protocol. The interface is the hardware guarantee. Protocol identification and communication stability will have a huge impact on the communication effect. The current solution is to make the equipment compatible with as many inverter manufacturers and models as possible when it leaves the factory. This requires the detection device to have a complete solution for unified testing, from equipment interface to detection method. At present, the functions and detection standards of the detection devices of various manufacturers and provincial governments are also different. Therefore, when the distributed power access unit is used as an independent asset, how to carry out testing on its functions and protocols becomes the key to supporting the distributed power access unit access, procurement, fault diagnosis and other detection work. At present, there is still a lack of effective technical means for automated testing of interfaces, functions and methods of distributed power access units.

[0003] Therefore, a detection system for a distributed power supply access unit is needed. Summary of the invention

[0004] The present invention provides a detection system for a distributed power access unit to solve the problem of how to efficiently detect the distributed power access unit.

[0005] In order to solve the above problems, according to one aspect of the present invention, a detection system for a distributed power access unit is provided, the system comprising: a host computer, a front-end processor, a programmable voltage source and at least one test table rack, each test table rack comprising: a station connection module, a whole machine power consumption test module, a station control module, a load capacity test module, a test interface and a test table; the station connection module, the whole machine power consumption test module, the station control module, the load capacity test module and the programmable voltage source are all connected to the front-end processor, and the front-end processor is connected to the host computer; wherein,

[0006] The host computer is used to control the test process and automated test of the distributed power access unit;

[0007] The front-end processor is used to control the functions of each module according to the control instructions of the host computer;

[0008] The program-controlled voltage source is connected to the distributed power access unit to be tested, and is used to provide the required electric energy to the distributed power access unit to be tested;

[0009] The station connection module is used to automatically connect the power interface of the distributed power access unit under test;

[0010] The whole machine power consumption test module is used to measure the whole machine power consumption value of the distributed power access unit under test;

[0011] The station control module is used to control the input of electrical energy to the station and the on-off of the signal channel;

[0012] The load capacity test module is used to measure the load capacity of the interface of the distributed power access unit under test;

[0013] The test interface is respectively connected to the station control module, the whole machine power consumption test module and the load capacity test module, and is used to connect the alignment interface of the tested distributed power supply access unit to the station control module, the whole machine power consumption test module and the load capacity test module;

[0014] The test station is used to install the distributed power access unit under test.

[0015] Preferably, the system further comprises:

[0016] The standard meter is connected to the front-end machine, the programmable voltage source and the test meter respectively, and is used to measure the electric energy output of the programmable voltage source to ensure the accuracy and stability of the electric energy.

[0017] The standard clock source is connected to the front-end processor and the test table to provide accurate clock signals.

[0018] Preferably, the standard meter, the marked clock source and the programmable voltage source are arranged in a power supply cabinet.

[0019] Preferably, the test stand further comprises:

[0020] The dual-mode module tooling is connected to the front-end machine and the meter position respectively to measure the communication capability of the dual-mode module interface of the distributed power access unit under test.

[0021] Preferably, the system uses RS485 data acquisition circuit when performing data acquisition.

[0022] Preferably, the workstation docking module comprises: a first control circuit connected to the electric push rod port 1, a second control circuit connected to the electric push rod port 2, a common-direction proportional amplifier, a voltage comparison circuit and an operational amplifier D1 B;

[0023] Among them, the first control circuit and the second control circuit are both connected to the non-inverting proportional amplifier, the non-inverting proportional amplifier, the voltage comparison circuit and the operational amplifier D1 B are connected in sequence, and the other end of the operational amplifier D1 B is connected to the GPIO port 3 of the single-chip computer.

[0024] Preferably, the first control circuit comprises: R1, R2, transistor V2, diode V1 and relay K1; the second control circuit comprises: R11, R212, transistor V6, diode V5 and relay K21; wherein one end of R1 is connected to the GPIO port 1 of the single-chip microcomputer, the other end of R1 is respectively connected to one end of R2 and one end of V2, the other end of V2 is connected to one end of V1, the other end of V1 is respectively connected to the voltage source and one end of K1, the other end of K1 is connected to the other end of V2, the other end of R2 is grounded, another end of V2 is grounded, and K1 is also connected to the electric push rod port 1; one end of R11 is connected to the GPIO port 2 of the single-chip microcomputer, The other end of R11 is connected to one end of R12 and one end of V6 respectively, the other end of V6 is connected to one end of V5, the other end of V5 is connected to the voltage source and one end of K2 respectively, the other end of K2 is connected to the other end of V6, the other end of R12 is grounded, another end of V6 is grounded, K2 is also connected to the electric push rod port 2, K1 and K2 are connected; resistors R1, R2, R11, R12 and transistors V2, V6 and diodes V1, V5 and relays K1, K2 constitute a dual-path relay switching circuit, which realizes the level conversion of the electric push rod port 1 and port 2 by controlling the levels of the microcontroller GPIO port 1 and the microcontroller GPIO port 2, thereby controlling the electric push rod to move forward and backward.

[0025] Preferably, the workstation docking module further includes: a current detection circuit connected to K1 and K2, the current detection circuit is composed of a resistor R6 and a diode V3, and the current in the circuit is calculated according to the voltage of the resistor R6. When the current is too large, the diode V3 is turned on to prevent R6 from being burned by overcurrent.

[0026] The present invention provides a detection system for a distributed power access unit, comprising: a host computer, used to control the test process and automated test of the distributed power access unit; a front-end computer, used to perform functional regulation on each module according to the control instructions of the host computer; a programmable voltage source, used to provide the required electric energy for the distributed power access unit under test; a station connection module, used to automatically connect the power interface of the distributed power access unit under test; a whole-machine power consumption test module, used to measure the whole-machine power consumption value of the distributed power access unit under test; a station control module, used to control the table position electric energy input and the on-off of the signal channel; a load capacity test module, used to measure the load capacity of the interface of the distributed power access unit under test; a test interface, used to connect the alignment interface of the distributed power access unit under test to the station control module, the whole-machine power consumption test module and the load capacity test module; a test table, used to install the distributed power access unit under test. The distributed power access unit detection system of the present invention can realize protocol conversion function verification, Bluetooth communication verification, RJ45 port power consumption verification, achieve one-time wiring, automatic testing, and improve testing efficiency; test the distributed power access unit data anti-collision capability, can effectively be compatible with on-site use, and improve the inverter adjustment success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0028] Figure 1 It is a structural schematic diagram of a detection system 100 of a distributed power supply access unit according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of an adaptive communication data circuit according to an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of an automatic connection control circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0032] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0033] Figure 1 It is a structural schematic diagram of the detection system 100 of the distributed power access unit according to the embodiment of the present invention. The detection system of the distributed power access unit provided by the embodiment of the present invention can realize the verification of the protocol conversion function, the verification of Bluetooth communication, the verification of the power consumption of the RJ45 port, realize one-time wiring, automatic testing, and improve the testing efficiency; the anti-collision capability of the distributed power access unit data is tested, which can be effectively compatible with the field use and improve the success rate of the inverter adjustment. The detection system provided by the embodiment of the present invention includes: a host computer, a front-end machine, a programmable voltage source and at least one test table rack, each test table rack includes: a station connection module, a whole machine power consumption test module, a station control module, a load capacity test module, a test interface and a test table; the station connection module, the whole machine power consumption test module, the station control module, the load capacity test module and the programmable voltage source are all connected to the front-end machine, and the front-end machine is connected to the host computer.

[0034] Preferably, the host computer is used to control the test process and automated testing of the distributed power supply access unit.

[0035] Preferably, the front-end processor is used to control the functions of each module according to the control instructions of the host computer.

[0036] Preferably, the programmable voltage source is connected to the distributed power access unit to be tested, and is used to provide the required electric energy to the distributed power access unit to be tested.

[0037] Preferably, the workstation docking module is used to automatically connect to the power interface of the distributed power access unit under test.

[0038] Preferably, the whole machine power consumption test module is used to measure the whole machine power consumption value of the distributed power supply access unit under test.

[0039] Preferably, the workstation control module is used to control the electrical energy input of the workstation and the on-off of the signal channel.

[0040] Preferably, the load capacity testing module is used to measure the load capacity of the interface of the distributed power supply access unit under test.

[0041] Preferably, the test interface is respectively connected to the workstation control module, the whole machine power consumption test module and the load capacity test module, and is used to connect the alignment interface of the distributed power supply access unit under test to the workstation control module, the whole machine power consumption test module and the load capacity test module.

[0042] Preferably, the test station is used to install a distributed power supply access unit to be tested.

[0043] Preferably, the system further comprises:

[0044] The standard meter is connected to the front-end machine, the programmable voltage source and the test meter respectively, and is used to measure the electric energy output of the programmable voltage source to ensure the accuracy and stability of the electric energy.

[0045] The standard clock source is connected to the front-end processor and the test table to provide accurate clock signals.

[0046] Preferably, the standard meter, the marked clock source and the programmable voltage source are arranged in a power supply cabinet.

[0047] Preferably, the test stand further comprises:

[0048] The dual-mode module tooling is connected to the front-end machine and the meter position respectively to measure the communication capability of the dual-mode module interface of the distributed power access unit under test.

[0049] Combination Figure 1 As shown, in the present invention, by designing a load capacity test module, through the detection method of programmable electronic load and non-contact voltage sampling, the problem that the load capacity of the RJ45 port of the distributed power access unit cannot be tested on an ordinary detection device is solved. By designing a workstation control module and combining the Bluetooth communication encryption and decryption method, the problem that the RJ45 port of the distributed power access unit cannot test the dedicated Bluetooth encrypted communication on an ordinary detection device is solved. By designing a workstation docking module, a dual-mode module tooling, and a test interface, the problem that the distributed power access unit test device cannot be automatically tested is solved by the method of automatic hardware docking and automatic software flow of the test process. By designing a workstation docking module, a front-end processor and application software, the problem that the distributed power access unit cannot test the protocol conversion on an ordinary detection device is solved by unifying the test protocol through the front-end processor.

[0050] like Figure 1 As shown in the figure, the distributed power access unit detection system consists of a host computer and application software, a front-end computer and application software, a power cabinet, and a test meter rack. Among them, the power cabinet consists of a programmable voltage source, a standard meter, and a standard clock source; the test meter rack consists of a station connection module, a whole machine power consumption test module, a station control module, an external interface, and a dual-mode communication module test tooling.

[0051] Among them, the host computer and application software are connected to the front-end machine and application software, and are used for test process control and automated testing of distributed power access units. The front-end machine and application software are respectively connected to the host computer and application software, programmable voltage source, standard table, standard clock source, workstation docking module, whole machine power consumption test module, workstation control module, load capacity test module, and dual-mode module tooling, and are used to execute the instructions of the host computer and application software to realize the functional regulation of each component. The programmable voltage source is respectively connected to the front-end machine and application software, standard table, and table position, and is used to provide accurate electric energy for the distributed power access unit under test. The standard table is respectively connected to the front-end machine and application software, programmable voltage source, and table position, and is used to measure the electric energy output of the programmable voltage source to ensure the accuracy and stability of the electric energy. The standard clock source is respectively connected to the front-end machine and application software, and table position, and is used to provide an accurate clock signal. The workstation docking module is respectively connected to the front-end machine and application software, and table position, and is used to automatically connect the power interface of the distributed power access unit under test. The whole machine power consumption test module is respectively connected to the front-end machine, the application software and the test interface, and is used to measure the whole machine power consumption value of the distributed power access unit under test. The workstation control module is respectively connected to the front-end machine, the application software and the table position, and is used to control the table position power input and the on-off of the signal channel. The test interface is respectively connected to the workstation control module, the whole machine power consumption test module and the load capacity test module, and is used to connect the alignment interface of the distributed power access unit under test to the whole machine power consumption test module and the load capacity test module. The load capacity test module is respectively connected to the front-end machine, the application software and the external interface, and is used to measure the load capacity of the interface of the distributed power access unit under test. The dual-mode module tooling is respectively connected to the front-end machine, the application software and the table position, and is used to measure the communication capability of the dual-mode module interface of the distributed power access unit under test. The table position is respectively connected to the alignment interface and the workstation docking module, and is used to install the distributed power access unit under test.

[0052] Preferably, the system uses RS485 data acquisition circuit when performing data acquisition.

[0053] Preferably, the workstation docking module comprises: a first control circuit connected to the electric push rod port 1, a second control circuit connected to the electric push rod port 2, a common-direction proportional amplifier, a voltage comparison circuit and an operational amplifier D1 B;

[0054] Among them, the first control circuit and the second control circuit are both connected to the non-inverting proportional amplifier, the non-inverting proportional amplifier, the voltage comparison circuit and the operational amplifier D1 B are connected in sequence, and the other end of the operational amplifier D1 B is connected to the GPIO port 3 of the single-chip computer.

[0055] Preferably, the first control circuit comprises: R1, R2, transistor V2, diode V1 and relay K1; the second control circuit comprises: R11, R212, transistor V6, diode V5 and relay K21; wherein one end of R1 is connected to the GPIO port 1 of the single-chip microcomputer, the other end of R1 is respectively connected to one end of R2 and one end of V2, the other end of V2 is connected to one end of V1, the other end of V1 is respectively connected to the voltage source and one end of K1, the other end of K1 is connected to the other end of V2, the other end of R2 is grounded, another end of V2 is grounded, and K1 is also connected to the electric push rod port 1; one end of R11 is connected to the GPIO port 2 of the single-chip microcomputer, The other end of R11 is connected to one end of R12 and one end of V6 respectively, the other end of V6 is connected to one end of V5, the other end of V5 is connected to the voltage source and one end of K2 respectively, the other end of K2 is connected to the other end of V6, the other end of R12 is grounded, another end of V6 is grounded, K2 is also connected to the electric push rod port 2, K1 and K2 are connected; resistors R1, R2, R11, R12 and transistors V2, V6 and diodes V1, V5 and relays K1, K2 constitute a dual-path relay switching circuit, which realizes the level conversion of the electric push rod port 1 and port 2 by controlling the levels of the microcontroller GPIO port 1 and the microcontroller GPIO port 2, thereby controlling the electric push rod to move forward and backward.

[0056] Preferably, the workstation docking module further includes: a current detection circuit connected to K1 and K2, the current detection circuit is composed of a resistor R6 and a diode V3, and the current in the circuit is calculated according to the voltage of the resistor R6. When the current is too large, the diode V3 is turned on to prevent R6 from being burned by overcurrent.

[0057] In the present invention, the adaptive communication data circuit is designed to ensure the accuracy and integrity of the data during inverter data conflict and high-frequency reading. The automatic connection control circuit is designed to ensure one-key crimping and one-key automatic testing of distributed power access unit detection.

[0058] like Figure 2As shown, the adaptive communication data circuit covers three functions: data acquisition, data processing and data upload. Among them, D1 is the RS485 data acquisition circuit, resistors R1 and R4 are level matching resistors, which are used to determine the initial level of the RS485 communication interface, and resistor R2 is a terminal matching resistor, which is used for impedance matching of the communication line. D2, D3, C1, L1, and R3 together constitute an adaptive transceiver switching circuit, which enables the distributed access unit to complete the automatic data transceiver conversion function without active control; among them, D2 is a logic NOT gate circuit, which uses a high-speed, low-transmission delay logic NOT gate to invert the data signal, in order to ensure the accuracy of communication quality and the real-time nature of data transceiver switching. Capacitor C1 and inductor L1 form a second-order LC high-pass filter, which is used to accelerate the processing of the output signal of D2, increase the time of the rising edge, and speed up the level conversion speed. Resistor R3 is a current-limiting resistor to prevent the resonance spikes generated by the LC high-pass filter from damaging the back-end D1 chip. In order to match the time, the circuit introduces a buffer chip D3. A high-speed, low-transmission delay, and hysteresis buffer should be selected to ensure the accuracy and integrity of the communication quality during high-frequency reading. The data processing unit is used for message parsing and protocol conversion, and performs protocol conversion, classification, summary, record and storage on the different types of distributed photovoltaic inverter data collected by the data acquisition circuit. The processed data is uploaded to the concentrator through the data upload circuit, and the concentrator performs the final data recording and storage.

[0059] like Figure 3 As shown, in the automatic connection control circuit of the embodiment of the present invention, the resistors R1, R2, R11, R12 and the transistors V2, V6 and the diodes V1, V5 and the relays K1, K2 constitute a dual-path relay switching circuit, and the level conversion of the electric push rod port 1 and port 2 is realized by controlling the level of the single-chip microcomputer GPIO port 1 and the single-chip microcomputer GPIO port 2, thereby controlling the electric push rod to move forward and backward. Among them, the resistor R6 and the diode V3 constitute a current detection circuit, and the current in the circuit is calculated according to the voltage of the resistor R6, wherein when the current is too large, the diode V3 is turned on to prevent R6 from being burned by overcurrent. The resistors R3, R9, R10 and the diode V4 and the operational amplifier D1A constitute a non-directional proportional amplifier to realize the amplification of the current detection circuit signal, wherein when the voltage of the resistor R3 is too high, the diode V4 is turned on to prevent the operational amplifier D1A from being burned. The resistors R7, R8 and capacitor C2 form a voltage divider circuit to achieve proportional reduction of the output amplitude of the operational amplifier D1A, and transmit the signal to the ADC port of the single-chip microcomputer. The single-chip microcomputer determines the working state of the electric push rod by judging the value of ADC. The resistors R4, R5, capacitor C1 and operational amplifier D1B form a voltage comparison circuit, which is used to transmit the signal to the GPIO port 3 of the single-chip microcomputer in time when the actual working current of the electric push rod is too large, control the electric push rod to retreat, and avoid the electric push rod from being burned by overcurrent.

[0060] The distributed power supply access unit detection system provided by the present invention can provide technical support for network access detection, supply inspection, fault detection and other tasks of the distributed power supply access communication unit.

[0061] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0062] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of said means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0063] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A detection system for a distributed power supply access unit, characterized in that: The system includes: a host computer, a front-end processor, a programmable voltage source and at least one test table rack, each test table rack includes: a station connection module, a whole machine power consumption test module, a station control module, a load capacity test module, a test interface and a test table; the station connection module, the whole machine power consumption test module, the station control module, the load capacity test module and the programmable voltage source are all connected to the front-end processor, and the front-end processor is connected to the host computer; wherein, The host computer is used to control the test process and automated test of the distributed power access unit; The front-end processor is used to control the functions of each module according to the control instructions of the host computer; The program-controlled voltage source is connected to the distributed power access unit to be tested, and is used to provide the required electric energy to the distributed power access unit to be tested; The station connection module is used to automatically connect the power interface of the distributed power access unit under test; The whole machine power consumption test module is used to measure the whole machine power consumption value of the distributed power access unit under test; The station control module is used to control the input of electrical energy to the station and the on-off of the signal channel; The load capacity test module is used to measure the load capacity of the interface of the distributed power access unit under test; The test interface is respectively connected to the station control module, the whole machine power consumption test module and the load capacity test module, and is used to connect the alignment interface of the tested distributed power supply access unit to the station control module, the whole machine power consumption test module and the load capacity test module; The test station is used to install the distributed power access unit under test.

2. The system according to claim 1, characterized in that The system further comprises: The standard meter is connected to the front-end machine, the programmable voltage source and the test meter respectively, and is used to measure the electric energy output of the programmable voltage source to ensure the accuracy and stability of the electric energy. The standard clock source is connected to the front-end processor and the test table to provide accurate clock signals.

3. The system according to claim 2, characterized in that The standard meter, the marked clock source and the program-controlled voltage source are arranged in the power cabinet.

4. The system according to claim 1, characterized in that The test stand also includes: The dual-mode module tooling is connected to the front-end machine and the meter position respectively to measure the communication capability of the dual-mode module interface of the distributed power access unit under test.

5. The system according to claim 1, characterized in that The system adopts RS485 data acquisition circuit when performing data acquisition.

6. The system according to claim 1, characterized in that The station docking module includes: a first control circuit connected to the electric push rod port 1, a second control circuit connected to the electric push rod port 2, a common-direction proportional amplifier, a voltage comparison circuit and an operational amplifier D1 B; Among them, the first control circuit and the second control circuit are both connected to the non-inverting proportional amplifier, the non-inverting proportional amplifier, the voltage comparison circuit and the operational amplifier D1 B are connected in sequence, and the other end of the operational amplifier D1 B is connected to the GPIO port 3 of the single-chip computer.

7. The system according to claim 6, characterized in that The first control circuit includes: R1, R2, transistor V2, diode V1 and relay K1; the second control circuit includes: R11, R212, transistor V6, diode V5 and relay K21; wherein one end of R1 is connected to GPIO port 1 of the single-chip microcomputer, the other end of R1 is respectively connected to one end of R2 and one end of V2, the other end of V2 is connected to one end of V1, the other end of V1 is respectively connected to a voltage source and one end of K1, the other end of K1 is connected to the other end of V2, the other end of R2 is grounded, another end of V2 is grounded, and K1 is also connected to electric push rod port 1; one end of R11 is connected to GPIO port 2 of the single-chip microcomputer, R11 The other end of is connected to one end of R12 and one end of V6 respectively, the other end of V6 is connected to one end of V5, the other end of V5 is connected to the voltage source and one end of K2 respectively, the other end of K2 is connected to the other end of V6, the other end of R12 is grounded, another end of V6 is grounded, K2 is also connected to the electric push rod port 2, K1 and K2 are connected; resistors R1, R2, R11, R12 and transistors V2, V6 and diodes V1, V5 and relays K1, K2 constitute a dual-path relay switching circuit, which realizes the level conversion of the electric push rod port 1 and port 2 by controlling the levels of the microcontroller GPIO port 1 and the microcontroller GPIO port 2, thereby controlling the electric push rod to move forward and backward.

8. The system according to claim 7, characterized in that The workstation docking module also includes: a current detection circuit connected to K1 and K2, the current detection circuit is composed of a resistor R6 and a diode V3, and the current in the circuit is calculated based on the voltage of the resistor R6. When the current is too large, the diode V3 is turned on to prevent R6 from being burned by overcurrent.

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