Automatic detection device, method and system for power supply module of power distribution terminal

Abstract

The invention discloses an automatic detection device, method and system for a power distribution terminal power supply module, and aims to solve the problems that existing detection depends on outsourcing equipment, the reference error is high, the cost is high, the project is single and the efficiency is low. The device comprises a device A connected to a main loop in series and a device B connected to the output side of a power module, and the device A and the device B are matched with serial server conversion, a background server and a terminal or a cloud platform to form a system. A test loop is switched through the control module, and six detection items of efficiency, load regulation rate, capacitive load, battery charging, battery activation and battery undervoltage can be automatically completed. The system has the characteristic of modular development, can expand the number of devices according to needs, does not need excessive manual participation, reduces the cost and detection deviation, supports remote monitoring, data backtracking and abnormity warning, and is suitable for efficient detection in the stages of research, development, production and the like of the power distribution terminal power supply module.

Description

Technical Field

[0001] This invention relates to the field of power supply testing technology, and in particular to an automated testing device, method and system for power distribution terminal power modules. Background Technology

[0002] Power distribution terminal products typically use AC-DC power modules to power the products. At the same time, due to the special requirements of power distribution products for long-term uninterrupted power supply, the power module needs to be connected to a battery. This adds battery management requirements on top of the conventional power functions and performance, and also adds new designs such as communication and remote control functions. All of the above places high demands on the R&D, selection, design and production stages of power distribution terminal products to test the function and performance of the power module.

[0003] Currently, existing testing methods mainly employ two approaches: manual inspection and equipment inspection. Manual inspection places high demands on personnel, and variations in operator skill levels can lead to uncertainties in test results, making assessment difficult and increasing labor costs. Equipment inspection, on the other hand, is problematic because electronic devices utilize numerous resistive and capacitive components and involve linear control. During high-precision testing, the load characteristics of the equipment itself can affect the accuracy of voltage and time parameters. Furthermore, most equipment can only test a single item; when multiple different items need to be tested simultaneously, different equipment must be used, increasing costs and wasting resources. Additionally, setting up different testing environments involves repeated disassembly and assembly, consuming time and resulting in low efficiency.

[0004] In existing technical solutions, most of them use electronic devices for semi-automated development, and the testing items are relatively simple, relying too much on the functions of the equipment. Summary of the Invention

[0005] The main objective of this invention is to provide an automated testing device, method, and system for power distribution terminal power modules, aiming to solve existing technical problems.

[0006] To achieve the above objectives, the present invention provides an automated testing device for power distribution terminal power modules, comprising: Device A is used to connect to an external power source and provide input to the power module of the power distribution terminal under test, as well as to automatically identify and switch between single-phase or three-phase input modes; Device B is used to connect the output terminal, battery terminal and activation remote control terminal of the power distribution terminal under test to perform performance and function tests on the power distribution terminal under test. The serial port server conversion module is communicatively connected to device A, device B, and the power supply module of the power distribution terminal under test, respectively, and is used to realize the conversion of communication protocols and data transmission; The backend server is connected to the serial port server conversion module and is used to receive test data, perform algorithm analysis, issue control commands, and generate test results.

[0007] Furthermore, the device A is connected in series in the main circuit and includes four input channels A, B, C, N, four output channels A, B, C, N, a serial communication interface, four controllable switching devices S1-S3 and S19, a control module-C2, a power supply, a serial communication module 1, and an AC acquisition module-J. The four input channels A, B, C, and N are used to connect to the power grid or other power supply equipment, and the four output channels A, B, C, and N are used to connect to the power supply module P of the power distribution terminal under test; the AC acquisition module-J is used to collect voltage and current data on the four input channels, and transmits them to the backend server through serial communication module 1 and serial server conversion; the control module-C2 is used to control the disconnection of S1-S3 and S19 according to the instructions of the backend server to realize the switching of three-phase or single-phase input.

[0008] Furthermore, the device B is connected to the output side of the power distribution terminal module P, and includes a battery input interface, an output interface, a remote control node, a serial communication module 2, fifteen controllable switching devices S4-S18, a control module-C1, a working power supply, a voltage acquisition module-D1, a current acquisition module-D2, a current acquisition module-D3, an analog backup battery, high-precision high-power resistors R1-R5 and capacitors C1-C3; The battery input interface is used to connect to the battery output of the power distribution terminal module P, and the output interface is used to connect to the output of the power distribution terminal module P. The remote control node is used to access the battery activation remote control of the power distribution terminal module P. The voltage acquisition module-D1 is used to acquire DC voltage, and the current acquisition modules-D2 and D3 are used to acquire DC voltage and bidirectional DC current and distinguish the current direction. The resistors R1-R5 are used as resistive loads, and the capacitors C1-C3 are used as capacitive loads. The control module-C1 is used to control the disconnection of S4-S18 according to the instructions of the background server to realize the loop switching of different detection items.

[0009] Furthermore, the controllable switching device is a controllable semiconductor device, including a transistor or a MOSFET; the capacitive load includes an electrolytic capacitor, a ceramic capacitor, or a supercapacitor; and the simulated backup battery is a supercapacitor or a high-capacity energy storage device with lithium supercapacitor.

[0010] Furthermore, both control module C1 and control module C2 include a minimum system watchdog circuit, a clock circuit, a crystal oscillator circuit, an SRAM storage circuit, at least four serial communication interfaces, and at least one remote control bus and supporting peripheral circuits. The control module acts as the control hub, used to acquire data from other modules and package and upload it, while also issuing instructions to each module and collecting feedback information.

[0011] Furthermore, the number of devices A and B can be modularly increased according to the number of input phases and output channels of the power supply module of the power distribution terminal under test.

[0012] An automated testing method for power distribution terminal modules includes the following steps; S1. Program reset, device A and device B are initialized, all controllable switching devices are in the off state, and the background server imports the preset values ​​and test standard values ​​of each test item; S2. The AC acquisition module-J of device A acquires the voltage data of input channels AN, BN, and CN, and transmits it to the back-end server. The back-end server determines whether the input type is three-phase or single-phase and imports the corresponding input power calculation scheme. S3. The back-end server sends instructions to device A via the serial port server. The control module-C2 controls the corresponding switch to close according to the input type: when there is a three-phase input, S1-S3 and S19 are closed simultaneously; when there is a single-phase input, one of S1, S2 or S3 is closed and then S19 is closed; the AC acquisition module-J periodically collects voltage and current data and transmits it to the back-end server. S4. The backend server sets the test mode, which includes performance testing and functional testing; the performance test includes three test items: efficiency, load regulation rate, and capacitive load; the functional test includes three test items: battery charging, battery activation, and battery undervoltage. S5. The control module-C1 of device B controls the corresponding switch to close according to the instructions of the background server, switches to the test circuit of the target detection item, and collects circuit data through voltage acquisition module-D1, current acquisition module-D2, and D3 and transmits it to the background server. S6. The backend server calculates and analyzes the collected data, compares the results with the test standard value, and determines whether the test is qualified. S7. The backend server uploads test data and results to the terminal or cloud platform to realize data storage, retrieval and backtracking; if an abnormality occurs during the test, the backend server triggers an alarm and reports it to the terminal or cloud platform, supporting remote operation and processing.

[0013] Further, in steps S5 and S6, the specific process of efficiency testing is as follows: control module C1 closes S5, S7, and S18, and then closes S8; voltage acquisition module D1 acquires the voltage between points F1 and F2, and current acquisition module D2 acquires the loop current and uploads it; the background server calculates the input active power P1 of device A (calculates the sum of the power of each phase when three-phase input, and directly calculates the active power when single-phase input) and the output active power P2 of device B; the efficiency value is calculated according to the formula efficiency = (P2 / P1) × 100%. If the efficiency value is not less than the test standard value, it is judged as qualified; otherwise, it is unqualified. The specific process of load regulation rate testing is as follows: Control module C1 closes S5, S7, and S18, and then closes S8, S9, S10, and S11 in sequence. After each closure, the voltage between L1 and L2 and the loop current are collected and uploaded. After the collection is completed, the current switch is disconnected and the next switch is closed. The background server records the voltage after S8 is closed as U1, and the voltages after S9, S10, and S11 are recorded as U2, U3, and U4 respectively. The voltage with the largest absolute value after subtracting U1 from the three is recorded as Umax. The regulation rate value is calculated according to the formula Load Regulation Rate = ((Umax - U1) / U1) × 100. If the regulation rate value is not higher than the test standard value, it is judged as qualified; otherwise, it is unqualified. The specific process of capacitive load testing is as follows: Control module-C1 closes S5, S7, S18, and S8; voltage acquisition module-D1 acquires the voltage between points G1 and G2 and uploads it to the backend server, which is recorded as U1; control module-C1 closes S13, and then closes S11, S15, and S16 in sequence. After each closure, the voltage between points G1 and G2 is acquired and uploaded, and recorded as U2, U3, and U4 respectively; the offset values ​​are calculated according to the formula |U2-U1|, |U3-U1|, and |U4-U1|. If all offset values ​​are not higher than the test standard value, the test is considered qualified; otherwise, it is unqualified.

[0014] Further, in steps S5 and S6, the specific process of the battery charging test is as follows: Control module C1 closes S4, S6, S11, and S12; voltage acquisition module D1 acquires the voltage between points H1 and H2; current acquisition module D3 acquires the loop current and uploads it; the background server analyzes the data: if the current value acquired by current acquisition module D3 is greater than 0A and not higher than the preset value, it is confirmed that the sample is charging; when the voltage value U1 acquired by voltage acquisition module D1 is greater than the preset value, it is determined that the battery is fully charged, control S4 is opened, and the test is qualified; if the current is 0A and U1 is lower than the preset value, the test is unqualified; the specific process of the battery activation test is as follows. The process is as follows: Control module C1 closes S4, S5, S7, S8, and S18, then closes S17, activating the power distribution terminal power module P; the serial port server reads the remote signaling status of power module P in real time; current acquisition modules D2 and D3 acquire the loop current; voltage acquisition module D1 acquires the voltage between points K1 and K2 and uploads it; the background server analyzes the data: if the current value acquired by current acquisition module D2 is higher than the preset value, the current value acquired by current acquisition module D3 is higher than the preset value and in the opposite direction, and the voltage value acquired by voltage acquisition module D1 is higher than the preset value, the test is qualified if all three conditions are met; otherwise, it is unqualified. The specific process of the battery undervoltage test is as follows: Control module C1 closes S6, S7, S8, S11, and S12 to discharge the battery through resistor R1. Voltage acquisition module D1 collects the voltage between points M1 and M2 and records it as U1. Current acquisition module D2 collects the loop current and records it as I1 and uploads it. The background server analyzes the data: If I1 is not lower than the preset value and U1 is not lower than the preset value, continue to close S8 for testing; if I1 is lower than the preset value or U1 is lower than the preset value, first open S8 for 1 minute and then close S4. The serial port server switches to read the remote signaling status of power module P, and current acquisition module D3 collects the current and records it as I2; if I2=0 and the power distribution terminal power module P reports a battery undervoltage remote signaling alarm signal, the test is qualified; otherwise, it is unqualified.

[0015] An automated testing system for power distribution terminal modules includes: At least one power supply module P of the power distribution terminal under test is used as a test sample; One or more devices A are used to automatically identify and switch the three-phase or single-phase input of the power distribution terminal module P, and report the circuit data to the background server. One or more devices B are used to perform performance and functional tests and upload test data to the backend server in real time. At least one serial port server converter is used to connect uplink and downlink devices to ensure normal communication. At least one backend server is used for algorithm processing, data storage, issuing control commands, and anomaly alarms; and, At least one terminal or cloud platform is required to remotely monitor the entire test system.

[0016] The beneficial effects of this invention are reflected in: This invention features automated testing, which can automatically complete the testing of a power distribution terminal module in a short time and switch to the preparation environment for the next sample. It requires minimal human intervention, saving labor costs and reducing the variability in test results caused by different operator skill levels, thus improving accuracy.

[0017] This invention does not use purchased equipment for core devices, does not rely on specific equipment models, does not involve secondary development of equipment protocols, and significantly reduces costs compared to purchased equipment solutions. At the same time, it avoids as much as possible the deviations introduced by uncertainties from equipment such as electronic loads.

[0018] This invention has the advantage of modular development, which can be adjusted according to the input and output requirements of the tested product, and the number of devices can be appropriately increased. The devices can be coupled to each other through serial communication. Attached Figure Description

[0019] Figure 1 A simplified structural diagram of the power module; Figure 2 This is a schematic diagram of the automated detection device for power distribution terminal modules of the present invention. Figure 3 This is a schematic diagram of the structure of device A of the present invention; Figure 4 This is a schematic diagram of the structure of device B of the present invention; Figure 5 This is a schematic diagram of the power module efficiency test of the present invention; Figure 6 This is a schematic diagram of the load regulation rate test of the power module of the present invention; Figure 7 This is a schematic diagram of the capacitive load test of the power module of the present invention; Figure 8 This is a schematic diagram of the battery charging test of the power module of the present invention; Figure 9 This is a schematic diagram of the battery activation test for the power module of the present invention; Figure 10 This is a schematic diagram of the undervoltage test of the power module battery of the present invention; Figure 11 This is a schematic diagram of control module C1 and control module C2 of the present invention; Figure 12 This is a schematic diagram of the automated testing method for power distribution terminal power modules of the present invention; Figure 13 For the present invention Figure 12 Enlarged view of the upper content; Figure 14 For the present invention Figure 12 Enlarged view of the central content; Figure 15 For the present invention Figure 12 Enlarged illustration of the content below. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 2 The present invention provides an automated testing device for power distribution terminal power modules, including device A, device B, serial port server conversion module and back-end server; Please refer to Figure 3 Device A is connected in series in the main circuit and mainly includes four input channels A, B, C, and N. The left side can be connected to the power grid or other power supply equipment; the right side has four output channels A, B, C, and N, which can be connected to the power distribution terminal power module P of the sample under test as the input of sample P; and a serial communication interface for conversion and connection with a serial server for data exchange. Device A includes four controllable switching devices: S1, S2, S3, and S19; a control module C2 can be used to control the switching of S1, S2, S3, and S19; a power supply serves as the operating power source for device A to maintain its operation; a serial communication module 1 connects to the AC acquisition module J and the control module C2 on one side, and connects to a serial server for conversion via a communication interface on the other side; an AC acquisition module J is used to acquire the voltages on the four input channels A, B, C, and N, and transmit the data to the serial communication module 1 in real time.

[0022] When device A is working: When an external power source is connected, the AC acquisition module-J will first acquire the voltage on each line of the input (AN, BN, CN), and then transmit the data to the serial port server for conversion through the serial communication module 1, and then transmit it to the back-end server. The back-end server will compare the uploaded data with the preset results, determine whether it is a three-phase or single-phase input, and import the corresponding input power calculation scheme (three-phase or single-phase). At the same time, it will send a remote control to device A through the serial port server conversion.

[0023] If it is a three-phase input, the control module-C2 closes S1, S2, S3, and S19 simultaneously. The AC acquisition module-J periodically collects data such as voltage and current on the closed circuit and transmits it to the backend server for processing through the serial communication module 1.

[0024] If it is not a three-phase input, the control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. The AC acquisition module-J periodically collects data such as voltage and current on the closed line and transmits it to the background server for processing through the serial communication module 1.

[0025] After device A completes its processing, the power supply module P of the power distribution terminal starts to receive power.

[0026] Please refer to Figure 4 Device B is typically connected to the output side of the power distribution terminal module P. It has one minimum battery input interface for connecting to the battery output of the power distribution terminal module P; one minimum output interface for connecting to the output of the power distribution terminal module P; one remote control node for connecting to the battery activation remote control of the power distribution terminal module P, controlling the power distribution terminal module P to activate the battery when needed; and one serial communication module 2 for connecting to a serial server for data exchange.

[0027] The device mainly includes 15 controllable switching devices: S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, and S18; a control module C1 can be used to control the switching of S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, and S18; a working power supply serves as the working power for device B, maintaining the device's operation; and a serial communication module 2, connected on one side to voltage acquisition module D1, current acquisition module D2, current acquisition module D3, and control module C1, and on the other side... The system connects to a serial port server via a communication interface for conversion. The voltage acquisition module D1 can acquire at least one direct voltage signal with good accuracy. Current acquisition modules D2 and D3 can each acquire at least one DC voltage and one DC current signal, with bidirectional current acquisition and the ability to distinguish current direction. A battery, simulating a backup battery for the power distribution terminal, is used to connect to the battery output circuit of the power distribution terminal's power module P. High-precision, high-power resistors R1, R2, R3, R4, and R5 are used as resistive loads. Capacitors C1, C2, and C3 are used as capacitive loads and can be, but are not limited to, electrolytic capacitors and ceramic capacitors.

[0028] It should be noted that the components in this device can be replaced with similar components at any time, and the module configurations such as resistive loads and capacitive loads can be changed as needed. The number of devices can also be appropriately increased according to the number of output circuits of the power distribution terminal module P under test, which has the advantage of modular development.

[0029] Generally, the efficiency of the output + and output - circuits, as well as their load capacity for resistive and capacitive loads, are the main focus of testing. The control module - C1 controls the controllable switching devices to switch the circuits. The battery + and battery - circuits can charge the battery through the current acquisition module D3 circuit, or when the power distribution terminal module P is activated, device B sends an activation command to the terminal power distribution module P, causing the battery to discharge to the power distribution terminal module P. At this time, the resistive loads of the output + and output - circuits will also be connected to cooperate with the battery to consume power for activation. At the same time, because the battery is used as a backup battery for simulation, the power distribution terminal module P needs to have the ability to report an undervoltage alarm when the battery voltage is low. At this time, the resistive load can consume the battery energy to simulate the scenario of battery voltage drop, and detect whether the power distribution terminal module P will report battery undervoltage alarm feedback information.

[0030] The information collected by device B will be uploaded to the backend server via serial communication and will be monitored by the backend server.

[0031] Specifically, the controllable switching devices are S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, and S19. Controllable semiconductor devices, including but not limited to transistors and MOSFETs, can also be selected.

[0032] Specifically, capacitive loads include electrolytic capacitors, ceramic capacitors, or supercapacitors; the simulated backup battery is a high-capacity energy storage device such as a supercapacitor or a lithium supercapacitor.

[0033] The serial port server conversion module is communicatively connected to device A, device B, and the power supply module of the power distribution terminal under test, respectively, and is used to realize the conversion of communication protocols and data transmission; Specifically, the communication signal transmission methods include, but are not limited to, serial ports, and network ports can also be used for transmission.

[0034] The backend server is connected to the serial port server conversion module for receiving test data, performing algorithm analysis, issuing control commands, and generating test results.

[0035] Specifically, backend servers, terminals, or cloud platforms can perform the following functions: The data uploaded from each module is coupled together, and algorithms are used to perform calculations and analyses. Test data reports are then output and stored in the database, which can be accessed locally or remotely for data backtracking, making it easier to locate problems. It monitors the operating status of the entire system in real time, reports abnormal situations for manual intervention, and supports remote operation. When problems occur during testing, they can be dealt with promptly.

[0036] Please refer to Figure 11 Control modules C1 and C2 are the core control boards, which can acquire data sent by other modules, collect, package, and upload it; at the same time, they can issue instructions to each module and collect feedback information from the modules, serving as the control center.

[0037] This includes a minimum system watchdog circuit, clock circuit, crystal oscillator circuit, and SRAM storage circuit, used to work with the main control chip; no less than 4 serial communication ports, which can be used to communicate with other modules inside the device and to receive and send information; and no less than one remote control bus and supporting peripheral circuits, which can be used to control the controllable switching devices in device A or device B.

[0038] Example 2: This invention provides an automated testing method for power distribution terminal power modules, comprising the following steps; S1. Program reset, device A and device B are initialized, all controllable switching devices are in the off state, and the background server imports the preset values ​​and test standard values ​​of each test item; S2. The AC acquisition module-J of device A acquires the voltage data of input channels AN, BN, and CN, and transmits it to the back-end server. The back-end server determines whether the input type is three-phase or single-phase and imports the corresponding input power calculation scheme. S3. The back-end server sends instructions to device A via the serial port server. The control module-C2 controls the corresponding switch to close according to the input type: when there is a three-phase input, S1-S3 and S19 are closed simultaneously; when there is a single-phase input, one of S1, S2 or S3 is closed and then S19 is closed; the AC acquisition module-J periodically collects voltage and current data and transmits it to the back-end server. S4. The backend server sets the test mode, which includes performance testing and functional testing; the performance test includes three test items: efficiency, load regulation rate, and capacitive load; the functional test includes three test items: battery charging, battery activation, and battery undervoltage. S5. The control module-C1 of device B controls the corresponding switch to close according to the instructions of the background server, switches to the test circuit of the target detection item, and collects circuit data through voltage acquisition module-D1, current acquisition module-D2, and D3 and transmits it to the background server. S6. The backend server calculates and analyzes the collected data, compares the results with the test standard value, and determines whether the test is qualified. S7. The backend server uploads test data and results to the terminal or cloud platform to realize data storage, retrieval and backtracking; if an abnormality occurs during the test, the backend server triggers an alarm and reports it to the terminal or cloud platform, supporting remote operation and processing.

[0039] Example 3: The present invention also provides an automated testing system for power distribution terminal modules, including at least one power distribution terminal module P under test as a test sample; one or more devices A for automatically identifying and switching the three-phase or single-phase input of the power distribution terminal module P, and reporting circuit data to a background server; one or more devices B for performing performance tests and functional tests, and uploading test data to the background server in real time; at least one serial port server converter for connecting uplink and downlink devices to ensure normal communication; at least one background server for algorithm processing, data storage, issuing control commands and anomaly alarms; and at least one terminal or cloud platform for remotely monitoring the entire testing system.

[0040] The testing system primarily performs performance and functional tests on the power distribution terminal module P. Performance testing includes three main items: efficiency, load regulation, and capacitive load. Functional testing includes three main items: battery charging, battery activation, and battery undervoltage. There are a total of six test items, which are explained below: (1) Performance test 1 - efficiency, such as Figure 5 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0041] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0042] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0043] 3. Set the test mode: Mode 1: Performance test.

[0044] 4. Set test items: Mode 1: Efficiency + Load regulation rate.

[0045] 5. Set up the testing process: Process 1: Efficiency.

[0046] 6. Control module C1 closes S5, S7, and S18, and closes S8. Voltage acquisition module D1 acquires the voltage between points F1 and F2, and current acquisition module D2 acquires the current in the circuit. The data is then transmitted to the backend server in real time through serial communication module 2.

[0047] 7. Backend server processing device A transmits data and calculates active power P1 (for three-phase input, the power of each phase needs to be calculated separately before calculating the total active power P1-three; for single-phase input, only the active power P1-single is calculated); backend server processing device B transmits data and calculates active power P2.

[0048] 8. Calculate the efficiency according to the formula: Efficiency = (P2 / P1) * 100%, and compare it with the test standard value. If it is not less than the test standard value, it is considered qualified; otherwise, it is unqualified.

[0049] (2) Performance test 2 - load regulation rate, such as Figure 6 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0050] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0051] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0052] 3. Set the test mode: Mode 1: Performance test.

[0053] 4. Set test items: Mode 1: Efficiency + Load regulation rate.

[0054] 5. Set up the test phase: Phase 2: Load regulation rate.

[0055] 6. Control module-C closes S5, S7, and S18, and then closes S8, S9, S10, and S11 in sequence. After each closure, acquisition module D1 acquires the voltage between L1 and L2, and current acquisition module D2 acquires the current in the circuit. The data is then transmitted to the backend server in real time through serial communication module 2. After acquisition, the module disconnects and then closes the next module. This process is repeated four times, and the data is then uploaded.

[0056] 7. The background server processing device A transmits data. The voltage data collected after S8 is closed is recorded as U1. The voltages in the circuit after S9, S10, and S11 are closed are recorded as U2, U3, and U4, respectively. The voltage with the largest absolute value after subtracting U1 from the three is recorded as Umax. The load regulation rate is calculated according to the formula: Load Regulation Rate = ((Umax - U1) / U1) * 100. It is compared with the test standard value. If it is not higher than the test standard value, it is considered qualified; otherwise, it is unqualified.

[0057] (3) Performance test 3 - capacitive load, such as Figure 7 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0058] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0059] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0060] 3. Set the test mode: Mode 1: Performance test.

[0061] 4. Set the test items: Mode 2: Capacitive load.

[0062] 5. When control module C1 closes S5, S7, S18, and S8, voltage acquisition module D1 acquires the voltage between points G1 and G2 and transmits the data to the backend server in real time via serial communication module 2, denoted as U1. When control module C1 closes S13, it then closes S11, S15, and S16 in sequence. After each closure, voltage acquisition module D1 acquires the voltage between points G1 and G2 and transmits the data to the backend server in real time via serial communication module 2, denoted as U2, U3, and U4.

[0063] 6. The backend server processes the output offset according to the formula: Output Offset = |U2 (or U3 or U4) - U1|, and compares it with the test standard value. If it is not higher than the preset value, it is qualified; otherwise, it is unqualified.

[0064] (4) Functional test 1 - Battery charging, such as Figure 8 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0065] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0066] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0067] 3. Set the test mode: Mode 2: Functional test.

[0068] 4. Set test items: Mode 1: Battery charging + battery activation.

[0069] 5. Set up the test process: Process 1: Battery charging.

[0070] 6. Control module C1 closes S4, S6, S11, and S12. Voltage acquisition module D1 acquires the voltage between points H1 and H2, and current acquisition module D3 acquires the current in the circuit. The data is then transmitted to the backend server in real time through serial communication module 2.

[0071] 7. The backend server analyzes the data and compares it with the preset value: When the current acquisition module D3 acquires current data that is not higher than the preset value and is greater than 0A, it confirms that the sample is charging the battery and keeps S4 closed; the voltage acquisition module D1 acquires voltage data, which is recorded as U1. When U1 is greater than the preset value, it is considered that the battery is fully charged, and S4 is opened to stop charging. The test is considered qualified; when the current is 0A, but U1 is lower than the preset value, the test is judged to be unqualified.

[0072] (5) Functional test 2 - Battery activation, such as Figure 9 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0073] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0074] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0075] 3. Set the test mode: Mode 2: Functional test.

[0076] 4. Set test items: Mode 1: Battery charging + battery activation.

[0077] 5. Set up the test procedure: Procedure 2: Battery activation.

[0078] 6. Control module C1 closes S4, S5, S7, S8, and S18, then closes S17 to start the power distribution terminal power module P for activation. During activation, the serial server reads the remote signaling status of power module P in real time via serial communication to confirm when the sample enters the activation state. At this time, the battery should begin discharging power module P and generate current through the output + / - circuit via resistor R1. Current acquisition modules D2 and D3 acquire the current in the circuit and transmit the data to the backend server in real time via serial communication module 2. Voltage acquisition module D1 acquires the voltage between points K1 and K2 and transmits the data to the backend server in real time via serial communication module 2.

[0079] 7. The backend server analyzes the data and compares it with the preset values: 1. Current acquisition module D2 collects current data that is higher than the preset value; 2. Current acquisition module D3 collects current data that is higher than the preset value, and the current direction is opposite; 3. Voltage acquisition module D1 collects voltage data that is higher than the preset value. All three conditions must be met for the test to be considered qualified; otherwise, it is considered unqualified.

[0080] (6) Functional test 3 - Battery low voltage, such as Figure 10 As shown; 1. First, the program is reset, device A and device B are initialized, all controllable switching devices are in the off state, and preset values ​​and test standard values ​​are imported for each test item (the algorithm is imported by the backend server and can be manually configured in advance) to determine whether the test results are qualified.

[0081] 2. Device A detects the voltage on each input line (AN, BN, CN) to see if it exceeds the predetermined value, and determines whether it is a three-phase or single-phase input: 2.1 Three-phase input: Control module-C2 simultaneously closes S1, S2, S3, and S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed circuit and transmits them to the backend server for processing via serial communication module 1.

[0082] 2.2 Single-phase input: Control module C2 closes S1, S2, or S3 (only one path is closed), and then closes S19. AC acquisition module-J periodically collects voltage, current, and other data on the closed line and transmits them to the backend server for processing via serial communication module 1.

[0083] 3. Set the test mode: Mode 2: Functional test.

[0084] 4. Set the test items: Mode 2: Battery low voltage.

[0085] 5. Control module C1 closes S6, S7, S8, S11, and S12, discharging the battery through resistor R1. During this time, the voltage will gradually decrease. Voltage acquisition module D1 collects the voltage between points M1 and M2 and transmits the data to the backend server in real time through serial communication module 2. This is denoted as U1. Current acquisition module D2 collects the current in the circuit and transmits the data to the backend server in real time through serial communication module 2. This is denoted as I1.

[0086] 6. The backend server analyzes the data and compares it with the preset values.

[0087] 6.1 If the following conditions are met simultaneously, then continue closing S8 and continue testing: 6.1.1 I1 is not lower than the preset value; 6.1.2 U1 is not lower than the preset value.

[0088] 6.2. If any of the following conditions is met, first disconnect S8, and after 1 minute, then close S4. At this time, the serial server conversion reads the remote signal status of the power supply module P of the distribution terminal through serial communication. The current acquisition module D3 acquires the current in the loop and transfers the data to the background server in real time through the serial communication module 2, denoted as I2: 6.2.1. I1 is lower than the preset value; 6.2.2. U1 is lower than the preset value.

[0089] 7. The background server analyzes the processing results. If the following conditions are met simultaneously, the test is determined to be qualified; otherwise, it is unqualified: 7.1. I2 = 0; 7.2. The power supply module P of the distribution terminal reports a battery under-voltage remote signal alarm signal.

[0090] It should be noted that if there are directional indications such as (up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0091] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, "multiple" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automated testing device for power distribution terminal modules, characterized in that... ,include: Device A is used to connect to an external power source and provide input to the power module of the power distribution terminal under test, as well as to automatically identify and switch between single-phase or three-phase input modes; Device B is used to connect the output terminal, battery terminal and activation remote control terminal of the power distribution terminal under test to perform performance and function tests on the power distribution terminal under test. The serial port server conversion module is communicatively connected to device A, device B, and the power supply module of the power distribution terminal under test, respectively, and is used to realize the conversion of communication protocols and data transmission; The backend server is connected to the serial port server conversion module and is used to receive test data, perform algorithm analysis, issue control commands, and generate test results.

2. The automated testing device for power distribution terminal modules as described in claim 1, characterized in that: The device A is connected in series in the main circuit and includes four input channels A, B, C, N, four output channels A, B, C, N, a serial communication interface, four controllable switching devices S1-S3 and S19, a control module-C2, a power supply, a serial communication module 1, and an AC acquisition module-J. The four input channels A, B, C, and N are used to connect to the power grid or other power supply equipment, and the four output channels A, B, C, and N are used to connect to the power supply module P of the power distribution terminal under test; the AC acquisition module-J is used to collect voltage and current data on the four input channels, and transmits them to the backend server through serial communication module 1 and serial server conversion; the control module-C2 is used to control the disconnection of S1-S3 and S19 according to the instructions of the backend server to realize the switching of three-phase or single-phase input.

3. The automated testing device for power distribution terminal modules as described in claim 2, characterized in that: The device B is connected to the output side of the power distribution terminal module P and includes a battery input interface, an output interface, a remote control node, a serial communication module 2, fifteen controllable switching devices S4-S18, a control module-C1, a working power supply, a voltage acquisition module-D1, a current acquisition module-D2, a current acquisition module-D3, an analog backup battery, high-precision high-power resistors R1-R5 and capacitors C1-C3; The battery input interface is used to connect to the battery output of the power distribution terminal module P, and the output interface is used to connect to the output of the power distribution terminal module P. The remote control node is used to access the battery activation remote control of the power distribution terminal module P. The voltage acquisition module-D1 is used to acquire DC voltage, and the current acquisition modules-D2 and D3 are used to acquire DC voltage and bidirectional DC current and distinguish the current direction. The resistors R1-R5 are used as resistive loads, and the capacitors C1-C3 are used as capacitive loads. The control module-C1 is used to control the disconnection of S4-S18 according to the instructions of the background server to realize the loop switching of different detection items.

4. The automated testing device for power distribution terminal modules as described in claim 3, characterized in that: The controllable switching device is a controllable semiconductor device, including a transistor or a MOSFET; the capacitive load includes an electrolytic capacitor, a ceramic capacitor, or a supercapacitor; the simulated backup battery is a supercapacitor or a high-capacity energy storage device with lithium supercapacitor.

5. The automated testing device for power distribution terminal modules as described in claim 3, characterized in that: Both control module C1 and control module C2 include a minimum system watchdog circuit, clock circuit, crystal oscillator circuit, SRAM storage circuit, no less than 4 serial communication interfaces, and no less than one remote control bus and supporting peripheral circuits. The control module acts as the control hub, used to acquire data from other modules and package and upload it, while issuing instructions to each module and collecting feedback information.

6. The automated testing device, method, and system for power distribution terminal modules as described in claim 1, characterized in that: The number of devices A and B can be modularly increased according to the number of input phases and output channels of the power supply module of the power distribution terminal under test.

7. An automated testing method for power distribution terminal modules, characterized in that: Includes the following steps; S1. Program reset, device A and device B are initialized, all controllable switching devices are in the off state, and the background server imports the preset values ​​and test standard values ​​of each test item; S2. The AC acquisition module-J of device A acquires the voltage data of input channels AN, BN, and CN, and transmits it to the back-end server. The back-end server determines whether the input type is three-phase or single-phase and imports the corresponding input power calculation scheme. S3. The background server sends instructions to device A through the serial port server. The control module-C2 controls the corresponding switch to close according to the input type: when there is a three-phase input, S1-S3 and S19 are closed at the same time; when there is a single-phase input, one of S1, S2 or S3 is closed and then S19 is closed. The AC data acquisition module-J periodically collects voltage and current data and transmits it to the backend server. S4. The backend server sets the test mode, which includes performance testing and functional testing; the performance test includes three test items: efficiency, load regulation rate, and capacitive load; the functional test includes three test items: battery charging, battery activation, and battery undervoltage. S5. The control module-C1 of device B controls the corresponding switch to close according to the instructions of the background server, switches to the test circuit of the target detection item, and collects circuit data through voltage acquisition module-D1, current acquisition module-D2, and D3 and transmits it to the background server. S6. The backend server calculates and analyzes the collected data, compares the results with the test standard value, and determines whether the test is qualified. S7. The backend server uploads test data and results to the terminal or cloud platform to realize data storage, retrieval and backtracking; If an anomaly occurs during the test, the backend server will trigger an alarm and report it to the terminal or cloud platform, supporting remote operation and handling.

8. The automated detection method for power distribution terminal power modules as described in claim 7, characterized in that: In steps S5 and S6, the specific process of efficiency testing is as follows: Control module C1 closes S5, S7, and S18, then closes S8; Voltage acquisition module D1 acquires the voltage between points F1 and F2, and current acquisition module D2 acquires the loop current and uploads it; The background server calculates the input active power P1 of device A (calculates the sum of the power of each phase when three-phase input is used, and directly calculates the active power when single-phase input is used) and the output active power P2 of device B; The efficiency value is calculated according to the formula efficiency = (P2 / P1) × 100%. If the efficiency value is not less than the test standard value, it is judged as qualified; otherwise, it is unqualified. The specific process of load regulation rate testing is as follows: Control module C1 closes S5, S7, and S18, and then closes S8, S9, S10, and S11 in sequence. After each closure, the voltage between L1 and L2 and the loop current are collected and uploaded. After the collection is completed, the current switch is disconnected and the next switch is closed. The background server records the voltage after S8 is closed as U1, and the voltages after S9, S10, and S11 are recorded as U2, U3, and U4 respectively. The voltage with the largest absolute value after subtracting U1 from the three is recorded as Umax. The regulation rate value is calculated according to the formula Load Regulation Rate = ((Umax - U1) / U1) × 100. If the regulation rate value is not higher than the test standard value, it is judged as qualified; otherwise, it is unqualified. The specific process of capacitive load testing is as follows: Control module-C1 closes S5, S7, S18, and S8; voltage acquisition module-D1 acquires the voltage between points G1 and G2 and uploads it to the backend server, which is recorded as U1; control module-C1 closes S13, and then closes S11, S15, and S16 in sequence. After each closure, the voltage between points G1 and G2 is acquired and uploaded, and recorded as U2, U3, and U4 respectively; the offset values ​​are calculated according to the formula |U2-U1|, |U3-U1|, and |U4-U1|. If all offset values ​​are not higher than the test standard value, the test is considered qualified; otherwise, it is unqualified.

9. The automated testing method for power distribution terminal modules as described in claim 7, characterized in that: In steps S5 and S6, the specific process of the battery charging test is as follows: Control module C1 closes S4, S6, S11, and S12; voltage acquisition module D1 acquires the voltage between points H1 and H2; current acquisition module D3 acquires the loop current and uploads it; the background server analyzes the data: if the current value acquired by current acquisition module D3 is greater than 0A and not higher than the preset value, it is confirmed that the sample is charging; when the voltage value U1 acquired by voltage acquisition module D1 is greater than the preset value, it is determined that the battery is fully charged, control S4 is opened, and the test is qualified; if the current is 0A and U1 is lower than the preset value, the test is unqualified; the specific process of the battery activation test is as follows: The control module C1 closes S4, S5, S7, S8, and S18, then closes S17 to activate the power distribution terminal power module P. The serial port server reads the remote signaling status of the power module P in real time. Current acquisition modules D2 and D3 acquire the loop current, and voltage acquisition module D1 acquires the voltage between points K1 and K2 and uploads it. The background server analyzes the data: if the current value acquired by current acquisition module D2 is higher than the preset value, the current value acquired by current acquisition module D3 is higher than the preset value and in the opposite direction, and the voltage value acquired by voltage acquisition module D1 is higher than the preset value, the test is qualified if all three conditions are met; otherwise, it is unqualified. The specific process of the battery undervoltage test is as follows: Control module C1 closes S6, S7, S8, S11, and S12 to discharge the battery through resistor R1. Voltage acquisition module D1 collects the voltage between points M1 and M2 and records it as U1. Current acquisition module D2 collects the loop current and records it as I1 and uploads it. The background server analyzes the data: If I1 is not lower than the preset value and U1 is not lower than the preset value, continue to close S8 for testing; if I1 is lower than the preset value or U1 is lower than the preset value, first open S8 for 1 minute and then close S4. The serial port server switches to read the remote signaling status of power module P, and current acquisition module D3 collects the current and records it as I2; if I2=0 and the power distribution terminal power module P reports a battery undervoltage remote signaling alarm signal, the test is qualified; otherwise, it is unqualified.

10. An automated testing system for power distribution terminal modules, characterized in that: include; At least one power supply module P of the power distribution terminal under test is used as a test sample; One or more devices A are used to automatically identify and switch the three-phase or single-phase input of the power distribution terminal module P, and report the circuit data to the background server. One or more devices B are used to perform performance and functional tests and upload test data to the backend server in real time. At least one serial port server converter is used to connect uplink and downlink devices to ensure normal communication. At least one backend server is used for algorithm processing, data storage, issuing control commands, and anomaly alarms; and, At least one terminal or cloud platform is required to remotely monitor the entire test system.

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