Intelligent test system and method based on configuration self-adaption

Abstract

The invention discloses an intelligent test system and method based on configuration self-adaption. The system comprises identification equipment, an upper computer, a test tool, a plurality of alternating current boards and a plurality of input and output boards, the identification equipment sends the serial number of the board card to the upper computer; the upper computer identifies board card configuration information according to the serial number of the to-be-tested board card, intelligently generates a test case according to the configuration information, and issues a test instruction to the test tool; a CPU module of the test tool receives a test instruction, controls a signal source module to output corresponding voltage and current signals according to the test instruction, and controls and detects an input and output board; the CPU module collects a secondary voltage signal output by the AC board, and obtains an input / output board signal through the signal source module; whether requirements are met or not is judged according to a measured value, and meanwhile, an acquisition result and a judgment result are uploaded to an upper computer. The method has the characteristics of high accuracy, high reliability, simple field debugging and the like, can greatly save in-plant debugging time, and avoids manual wire removal and repeated wiring work.

Description

Technical Field

[0001] This invention belongs to the field of relay protection device testing technology, and more specifically, relates to an intelligent testing system and method based on configuration adaptation. Background Technology

[0002] The existing method for calibrating the sampling accuracy of relay protection devices is generally carried out during the whole-machine testing stage. The relay protection device is powered on, and the analog current and voltage quantities are applied to the AC board of the relay protection device using a relay protection tester. Then, the calibration program is manually executed through the LCD, and finally, the zero drift and full-scale calibration coefficients are stored in the designated memory of the CPU board.

[0003] This method involves calibrating the CPU board and AC board together. If either the CPU board or the AC board needs to be replaced on-site, both boards must be replaced together, increasing manpower and material costs. Additionally, it requires manual control of the relay protection tester to increase the output and operation of the LCD menu, resulting in low efficiency and the risk of misoperation or omission, thus reducing reliability.

[0004] Prior art document 1 (CN115060306A) discloses an analog quantity calibration method applied to an analog quantity acquisition device. The method includes: acquiring DC calibration parameters and AC compensation parameters; wherein, the DC calibration parameters are determined by known DC signals from multiple input analog quantity acquisition devices and DC acquisition result signals corresponding to multiple known DC signals, and the AC compensation parameters are determined by known AC signals from multiple input analog quantity acquisition devices and AC acquisition result signals corresponding to multiple known AC signals; acquiring the currently acquired analog quantity; calibrating the currently acquired analog quantity according to the DC calibration parameters to obtain a DC calibration analog quantity; when the rate of change of the DC calibration analog quantity is greater than the AC calibration threshold, calibrating the DC calibration analog quantity according to the AC compensation parameters to obtain a calibrated analog quantity; when the rate of change of the DC calibration analog quantity is less than or equal to the AC calibration threshold, determining the DC calibration analog quantity as the calibrated analog quantity.

[0005] Prior art document 2 (CN117269738A) discloses a calibration method for AC signals. The method includes: grouping the signal channels of the device to be calibrated into pairs according to a preset grouping scheme to obtain at least one calibration group; sending a preset waveform signal from one signal channel in the calibration group to another signal channel to determine a first falling edge error value corresponding to the falling edge of the signal channel configured as receiving mode, and calibrating the signal channel configured as receiving mode using the first falling edge error value.

[0006] It is understandable that prior art document 1 is used in the field of industrial control and mainly addresses the technical problems of dynamic response performance caused by interference, while prior art document 2 relates to the field of automatic testing equipment and mainly addresses the problem that the calibration accuracy of the falling edge of AC signals does not meet the requirements. Neither prior art document 1 nor prior art document 2 provides technical insights into solving the technical problems of high cost, low efficiency, misoperation, and omissions in field testing of relay protection devices. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an intelligent testing system and method based on configuration adaptation.

[0008] The present invention adopts the following technical solution. The first aspect of the present invention provides an intelligent testing system based on configuration adaptation, comprising: an identification device, a host computer, testing fixtures, multiple AC boards, and multiple input / output boards; The identification device is used to obtain the serial number of each board and send the board serial number to the host computer; The host computer is connected to the test fixture; the host computer identifies the board configuration information according to the serial number of the board under test, intelligently generates test cases according to the configuration information, and issues test instructions to the test fixture; The test fixture includes a CPU module and a signal source module; the CPU module receives test commands and controls the signal source module to output corresponding voltage and current signals according to the test commands, thereby controlling and detecting the input / output board. The CPU module acquires the secondary voltage signal output by the AC board, obtains the input and output signals of the switchboard through the signal source module, and determines whether the requirements are met based on the measured values. At the same time, the acquisition results and judgment results are uploaded to the host computer.

[0009] Preferably, the CPU module includes: CPU, DDR, FLASH, FPGA, EEPROM, ADC, Ethernet PHY chip and backplane terminals; Among them, the CPU is the core control chip of the entire CPU module; DDR is the memory chip; FLASH is used to store the boot program and system program; FPGA is used to expand the external Ethernet interface and connect to the ADC to realize the AC signal acquisition function; EEPROM is used to store calibration parameter data; Ethernet PHY chip is used to implement the physical layer Ethernet interface function; and backplane terminals are used to realize the model interaction function with the AC board.

[0010] Preferably, the signal source module includes: a voltage source, a current source, a programmable power supply, and a switching matrix unit; The input terminal of the switch matrix unit is connected to the output terminals of the voltage source, current source, and programmable power supply; the output terminal of the switch matrix unit is connected to the board under test; and the control terminal of the switch matrix unit is connected to the CPU module. The switch matrix values ​​determine which switches are open and which are closed, thereby outputting different voltage and current sources.

[0011] Preferably, the switching matrix unit includes: a current source switching matrix circuit, a voltage source switching matrix circuit, and a switching quantity switching matrix circuit; The input terminal of the current source switch matrix circuit is connected to the current source, and the output of the four current sources is controlled by eight relay switches; and / or, The input terminal of the voltage source switch matrix circuit is connected to the voltage source, and the output of the four voltage sources is controlled by four relay switches; and / or, The input terminal of the switch matrix circuit is connected to the programmable power supply. Each input or output of the switch matrix circuit is controlled by two optocouplers. At the same time, a single-pole double-throw switch is used to switch between input and output testing. Two terminals are shared for external wiring.

[0012] Preferably, the voltage source is used to provide three-phase voltage signals A, B, and C, with an amplitude of 120V AC and a frequency of 50Hz; The current source is used to provide three-phase current signals A, B and C, with an amplitude of 1A or 5A selectable and a frequency of 50HZ. The programmable power supply is used to provide the DC 110V / 220V / 24V / 48V detection voltage required for input / output testing; The switch matrix unit is controlled by the host computer intelligent test software. It selects the signal source output according to the number and position of different voltage and current channels of the AC board under test and the different detection voltage level channels of the switch quantity.

[0013] Preferably, the multiple AC boards use standardized input and output terminals. The input terminals are 24-pin high-current terminals, and the output terminals are 30-pin European connectors. Each AC board supports a maximum of 12 circuits; and / or, The multiple input / output boards use a unified input / output terminal block. The input terminal block uses a 32-pin universal I / O terminal block, and each board supports a maximum of 24 input channels or 16 output channels.

[0014] A second aspect of the present invention provides a configuration-adaptive intelligent testing method, based on the configuration-adaptive intelligent testing system described in the first aspect, comprising the following steps: The serial number of the board under test is identified and sent to the host computer to obtain the configuration information of the board under test. The host computer automatically generates test cases based on the configuration information and configures the AC voltage and current values ​​and switch quantity detection voltage required for the output of the test fixture. The CPU module sends test content, including: AC board test content and input / output board test content; The tests begin sequentially, including: testing the AC board to determine if it meets the accuracy requirements, and testing the input / output boards to determine if they function correctly. After the test is completed, the host computer automatically generates a test report.

[0015] Preferably, the AC voltage and current values ​​and the switching quantity detection voltage required by the configuration test fixture output include: By scanning the QR code of the board under test, various configuration information of the board under test is obtained. The host computer automatically generates test cases based on the configuration information, encodes the configuration information and sends it to the CPU module. After the CPU module parses the information, it sets the switch matrix unit of the signal source module to output different voltage and current sources.

[0016] Preferably, the AC board test includes: zero drift adjustment, scale adjustment, and testing three sets of AC amplitude and angle values ​​for each channel; First, adjust the zero drift and scale, then read the fixed voltage and current values, and calculate and determine whether the board can meet the accuracy requirements based on the read configuration ratings. During zero-drift adjustment, the current source switch matrix circuit and voltage source switch matrix of the signal source module are disconnected, and the measurement value of each channel is read respectively; during scale adjustment, the signal source module is controlled to output a rated value, and the measurement value of each channel is read respectively.

[0017] Preferably, the input board test includes: controlling the optocoupler output of the input board to detect the input voltage through the switch matrix circuit, and transmitting the detected input state change to the CPU module through the backplane bus. The testing of the output board includes: controlling the output board to output the corresponding channel status through the CPU module, and detecting whether the channels of the output board are normal through the optocoupler input of the switch matrix.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least the following: the general board intelligent test system based on switch matrix and configuration adaptation of this application has the characteristics of high accuracy, strong reliability and simple on-site debugging, which can greatly save the debugging time of factory and substation operation and maintenance personnel, avoid manual disconnection and reconnection work, and the test data stored by the system for a long time can also provide a strong basis for analysis of on-site fault problems. Attached Figure Description

[0019] Figure 1This is a block diagram of a configuration-adaptive intelligent testing system provided according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a current source switch matrix circuit. Figure 3 This is a schematic diagram of a voltage source switch matrix circuit. Figure 4 This is a schematic diagram of a digital input / output switch matrix circuit. Figure 5 This is a flowchart of an intelligent testing method based on configuration adaptation provided in accordance with an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0021] This invention belongs to the field of electrical system technology, and particularly relates to an automatic testing system for relay protection devices, especially an intelligent testing system and method for AC boards and input / output boards of relay protection devices. The system automatically calibrates the CPU board and AC board separately in the single-board testing stage. The CPU board and AC board can be arbitrarily paired, improving engineering maintenance efficiency and reducing costs. The system and method realize the calibration and testing of AC boards and input / output boards, thereby achieving the calibration and management of AC boards and input / output boards.

[0022] like Figure 1 As shown, Embodiment 1 of the present invention provides an intelligent testing system based on configuration adaptation, including: an identification device, a host computer, a testing fixture, multiple AC boards and multiple input / output boards.

[0023] It is understandable that multiple AC boards and multiple input / output boards are the boards under test.

[0024] The identification device is used to obtain the serial number of each board and connect to the host computer via wired or wireless means to send the board serial number to the host computer.

[0025] Preferably, but not limitingly, the identification device is a barcode scanner, which can be handheld or automatic, used to scan the unique QR code number of the board to obtain the board serial number.

[0026] The host computer is connected to the test fixture via wired or wireless means; the host computer identifies the configuration information based on the serial number of the board under test, intelligently generates test cases based on the configuration information, and issues test instructions to the test fixture.

[0027] Preferably, but not limitingly, the host computer includes a desktop computer and testing software. The testing software is intelligent testing software running on the desktop computer.

[0028] The test fixture receives test commands and performs tests, including: outputting corresponding voltage and current signals, applying them to the AC board and the input / output board, controlling and detecting the input / output board, and uploading the acquisition results and judgment results to the host computer.

[0029] Preferably, but not limitingly, the test fixture includes: a CPU module, a signal source module, a power supply module, and an auxiliary connection module. The CPU module is connected to the signal source module, power supply module, and auxiliary connection module, preferably, but not limitingly, to the host computer via an Ethernet cable. The host computer issues test commands through test software. The signal source module outputs corresponding voltage and current signals according to the test commands to control and detect the input / output boards. The CPU module acquires the secondary voltage signal output from the AC board through an ADC sampling circuit and obtains the input / output board signals through the signal source module. The CPU module determines whether the requirements are met based on the measured values ​​and simultaneously uploads the acquisition results and determination results to the host computer.

[0030] Further preferably, but not limitingly, the CPU module includes: a CPU, DDR, FLASH, FPGA, EEPROM, ADC, Ethernet PHY chip, and backplane terminals. The CPU is the core control chip of the entire CPU module; DDR is a memory chip; FLASH is used to store the boot program and system program; the FPGA is used to expand the external Ethernet interface and connect to the ADC to realize the AC signal acquisition function; the EEPROM is used to store calibration parameter data; the Ethernet PHY chip is used to implement the physical layer Ethernet interface function; and the backplane terminals are used to realize the model interaction function with the AC board.

[0031] Further preferably, but not limitingly, the signal source module includes: a voltage source, a current source, a programmable power supply, and a switching matrix unit. The voltage source is used to provide three-phase voltage signals A, B and C, with an amplitude of 120V AC and a frequency of 50Hz. The current source is used to provide three-phase current signals A, B and C, with an amplitude of 1A or 5A selectable and a frequency of 50HZ. The programmable power supply is used to provide the DC 110V / 220V / 24V / 48V detection voltages required for input / output testing; The input terminal of the switch matrix unit is connected to the output terminal of the voltage source, current source, and programmable power supply; the output terminal of the switch matrix unit is connected to the board under test; and the control terminal of the switch matrix unit is connected to the CPU module.

[0032] The switch matrix unit is controlled by the host computer intelligent test software. It can flexibly select the signal source output according to the number and position of different voltage and current channels of the AC board under test and the different detection voltage levels of the switch quantity, which greatly saves the time of wiring and changing the signal source type.

[0033] The switching matrix unit includes: a current source switching matrix circuit, a voltage source switching matrix circuit, and a switching quantity switching matrix circuit.

[0034] Specifically, such as Figure 2 As shown, this is a schematic diagram of a current source switch matrix circuit. The input terminal of the current source switch matrix circuit is connected to the current source. The output of the four current sources is controlled by eight relay switches, which can realize the flexible configuration of the four current input channels of the AC board. It can be understood that the output of the tester is generally three-phase A / B / C, with each phase carrying four current channels of the AC board under test. In this way, the three phases can carry 12 channels. Through series connection, the current value of each channel is the same, which is the current value output by the signal source.

[0035] Similarly, such as Figure 3 As shown, it is a schematic diagram of a voltage source switch matrix circuit. The input terminal of the voltage source switch matrix circuit is connected to the voltage source. The output of the four voltage sources is controlled by four relay switches, which can realize the flexible configuration of four voltage input channels of the AC board. Similarly, after copying the same circuit structure three times, the testing of a 12-channel current and voltage AC board can be realized.

[0036] like Figure 4 As shown, it is a schematic diagram of a digital input / output matrix circuit. The input terminal of the digital input / output matrix circuit is connected to the programmable power supply. Each input or output of the digital input / output matrix circuit is controlled by two optocouplers. At the same time, a single-pole double-throw switch is used to switch between input and output testing. Two terminals are shared for external wiring. To test 16 channels, the same circuit can be copied.

[0037] It is worth noting that, as one of the prominent substantive features of this invention, the current source switch matrix circuit and the voltage source switch matrix circuit together form an AC signal source based on an analog switch matrix, and the switch matrix circuit constitutes a digital signal source based on a digital switch matrix, realizing the beneficial technical effect of configuring adaptive automatic output of AC voltage and current values ​​and switch detection voltage.

[0038] The power module is used to provide power to the entire test fixture. The power module has an input voltage of AC220V and an output of DC5V to provide power to the CPU module and the switch matrix unit.

[0039] The auxiliary connection module is used to realize the model connection of the entire test fixture system, including: the connection of voltage source, current source, programmable power supply and switch matrix unit, the connection of switch matrix and AC board, power supply module and CPU module, signal source module, AC board, etc.

[0040] The multiple AC boards mentioned above use unified input and output terminals. The input terminals use 24-pin high-current terminals, and the output terminals use 30-pin European connectors. Each AC board supports a maximum of 12 circuits. Voltage and current circuits can be selected according to different needs, resulting in hundreds of configuration options.

[0041] The multiple input / output boards use unified input / output terminals. The input terminals use 32-pin universal I / O terminals, and the output terminals use high-speed connectors. Each board supports a maximum of 24 inputs or 16 outputs. If combined boards are used, they support a maximum of 16 inputs and 8 outputs. The input supports selectable DC voltages of 110V / 220V / 24V / 48V.

[0042] like Figure 5 As shown, Embodiment 2 of the present invention provides a configuration-adaptive intelligent testing method, based on the configuration-adaptive intelligent testing system as described in Embodiment 1, including the following steps: Step 1: Identify the serial number of the board under test and send it to the host computer to obtain the configuration information of the board under test. The host computer automatically generates test cases based on the configuration information and configures the AC voltage and current values ​​and switch quantity detection voltage required for the output of the test fixture.

[0043] Preferably, but not limitingly, the barcode scanner can obtain various configuration information of the board under test by scanning the QR code of the board under test. The host computer automatically generates test cases based on the configuration information, encodes the configuration information and sends it to the CPU module. After parsing the data, the CPU module sets the switch matrix value to determine which switches are open and which are closed, thereby outputting different voltage and current sources.

[0044] Step 2: Send test content to the CPU module, including: AC board test content and input / output board test content.

[0045] Preferably, but not limitingly, the AC board test content includes: zero drift adjustment, scale adjustment, and testing three sets of AC amplitude and angle values ​​for each channel; the input / output board test content includes: input / output channel configuration, etc.

[0046] Step 3: Start the tests sequentially, including: testing the AC board to determine if the board can meet the accuracy requirements, and testing the input / output boards to determine if the functions are normal.

[0047] Preferably, but not limitingly, step 3 specifically includes: Step 3.1: Perform AC board testing, including: first adjust zero drift and scale, then read fixed voltage and current values, and calculate and determine whether the board can meet the accuracy requirements based on the read configuration ratings.

[0048] Specifically, during zero-drift adjustment, the current source switch matrix circuit and the voltage source switch matrix are disconnected, and the measurement value of each channel is read separately; during scale adjustment, the signal source module is controlled to output a rated value, and the measurement value of each channel is read separately.

[0049] Calibration formula: True value = (Measured value – Zero drift) × Full-scale coefficient For example: The standard source outputs a true value of 120 V. The measured value after sampling was 119.2 V (including zero drift of 0.3 V). calculate: Zero drift = 0.3 V Full-scale factor = 120 / (119.2 - 0.3) ≈ 1.0092 After calibration: True value = (Measured value - 0.3) × 1.0092 Step 3.2: Perform input board testing, including: controlling the optocoupler output of the input board to detect the input voltage by controlling the switch matrix circuit of the switch quantity; after the input board identifies the input status change, it transmits the information to the CPU module through the backplane bus. The board is tested, including controlling the output channel status of the board through the CPU module and detecting whether the channels of the board are normal through the optocoupler input of the switch matrix.

[0050] Step 4: After the test is completed, the host computer automatically generates a test report. For example, but not limited to, the test report includes: AC board channel configuration information, i.e., the number of current and voltage channels, whether the current and voltage channel tests are normal, the zero drift value and full scale value of the current and voltage channels, the linearity test value, whether the input status is normal, and whether the output status is normal.

[0051] It is understandable that analog signal acquisition and digital input / output functions are core functions of power system relay protection devices, involving AC boards, digital input / output boards, and CPU boards. Key characteristics include numerous board configurations, high precision requirements, and flexible board replacement. To address these characteristics, this invention provides a configuration-adaptive intelligent testing system and method. By analyzing the operating characteristics of multiple AC boards and digital input / output boards, an AC and digital signal source based on analog and digital switch matrices is designed. Each board has a unique QR code; scanning the QR code retrieves various board configuration information. The host computer automatically generates test cases based on the configuration information, thereby controlling the switch matrix state and automatically outputting the required AC voltage and current values, as well as the digital input / output detection voltage, etc., which are then applied to the AC boards and digital input / output boards using test fixtures.

[0052] Terminology Explanation: CPU: Central Processing Unit; DDR: Double Data Rate, synchronous dynamic random access memory; FLASH: Flash memory, a type of non-volatile memory; FPGA: Field-Programmable Gate Array; EEPROM: Electrically Erasable Programmable Read-Only Memory; ADC: Analog-to-Digital Converter; PHY: Physical Layer, the interface chip for the physical layer.

[0053] It is worth noting that in the embodiments of the present invention, "steps + numbers" is only a way of expressing the specific implementation of the method, and not an absolute restriction on the order of the steps. Under the guidance of the core concept of the present invention, changing the order of these steps to obtain the same or similar technical effects all fall within the scope of the present invention.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A configuration-adaptive based intelligent test system, characterized in that, The system comprises: an identification device, a host computer, a test tool, a plurality of AC boards and a plurality of input and output boards; the identification device is used to acquire the serial numbers of the boards, and send the serial numbers to the host computer; the host computer is connected with the test tool; the host computer identifies the configuration information of the boards according to the serial numbers of the boards to be tested, intelligently generates test cases according to the configuration information, and sends test instructions to the test tool; the test tool comprises a CPU module and a signal source module; the CPU module receives the test instructions, controls the signal source module to output corresponding voltage and current signals according to the test instructions, and controls and detects the input and output boards; the CPU module collects the secondary voltage signals output by the AC boards, acquires the input and output board signals through the signal source module, and judges whether the requirements are met according to the measurement values, and uploads the collection results and the judgment results to the host computer.

2. The intelligent test system based on configuration adaptation according to claim 1, wherein: the CPU module comprises a CPU, a DDR, a FLASH, a FPGA, an EEPROM, an ADC, an Ethernet PHY chip and a backplane terminal; the CPU is a core control chip of the whole CPU module; the DDR is a memory chip; the FLASH is used to store a start program and a system program; the FPGA is used to expand an external Ethernet interface, connect the ADC to realize the collection function of AC signals; the EEPROM is used to store calibration parameter data; the Ethernet PHY chip is used to realize the function of the Ethernet interface of the physical layer; and the backplane terminal is used to realize the model interaction function with the AC boards.

3. The intelligent test system based on configuration adaptation according to claim 1 or 2, wherein: the signal source module comprises a voltage source, a current source, a program-controlled power supply and a switch matrix unit; the input end of the switch matrix unit is connected with the output ends of the voltage source, the current source and the program-controlled power supply; the output end of the switch matrix unit is connected with the board to be tested; and the control end of the switch matrix unit is connected with the CPU module, so that the opening and closing of the switches are determined by the switch matrix value, thereby outputting different voltage sources and current sources.

4. The intelligent test system based on configuration adaptation according to claim 3, wherein: the switch matrix unit comprises a current source switch matrix circuit, a voltage source switch matrix circuit and a switch value switch matrix circuit; the input end of the current source switch matrix circuit is connected with the current source, and 4-way current source output is controlled through 8 relays; and / or the input end of the voltage source switch matrix circuit is connected with the voltage source, and 4-way voltage source output is controlled through 4 relays; and / or the input end of the switch value switch matrix circuit is connected with the program-controlled power supply, and each 1-way input or output of the switch value switch matrix circuit is controlled through 2 optocouplers, and a single-throw double-pole switch is used to switch the input and output test, and 2 terminals are shared for external wiring terminals.

5. The intelligent test system based on configuration adaptation according to claim 4, wherein: The voltage source is used for providing A\B\C three-phase voltage signals, with an amplitude of 120V and a frequency of 50HZ; The current source is used for providing A\B\C three-phase current signals, with an amplitude of 1A or 5A and a frequency of 50HZ; The program-controlled power supply is used for providing DC 110V / 220V / 24V / 48V detection voltages required by the opening-in and opening-out test; The switch matrix unit is controlled by the intelligent test software of the upper computer, and according to the different voltage and current channel numbers, positions, switch value and different detection voltage levels of the to-be-tested AC board and the opening-in and opening-out board, the signal source output is selected.

6. The intelligent test system based on configuration adaptation according to claim 3, characterized in that: a plurality of the AC boards adopt unified input and output terminals, the input terminals adopt 24-pin large-current terminals, the output terminals adopt 30-pin European connectors, and each AC board supports a maximum of 12 loops; and / or a plurality of the opening-in and opening-out boards adopt unified input and output terminals, the input terminals adopt 32-pin general-purpose IO terminals, and each board card supports a maximum of 24 input or 16 output.

7. A configuration-adaptive intelligent testing method based on the configuration-adaptive intelligent testing system according to any one of claims 1 to 6. The method comprises the following steps: The serial number of the to-be-tested board card is identified and sent to the upper computer, so as to obtain the configuration information of the to-be-tested board card, the upper computer automatically generates a test case according to the configuration information, and the configuration test tool outputs the required AC voltage and current values and switch value detection voltages; The CPU module sends test content, including AC board test content and opening-in and opening-out board test content; The sequence starts the test, including testing the AC board, judging whether the board card can meet the precision requirement, and testing the opening-in and opening-out board, judging whether the function is normal; After the test is completed, the upper computer automatically forms a test report.

8. The intelligent test method based on configuration adaptation according to claim 7, characterized in that: The configuration test tool outputs the required AC voltage and current values and switch value detection voltages, including: The configuration information of various to-be-tested board cards is obtained by scanning the two-dimensional code of the to-be-tested board card, the upper computer automatically generates a test case according to the configuration information, the configuration information is encoded and sent to the CPU module, the CPU module parses and sets the switch matrix unit of the signal source module, and different voltage sources and current sources are output.

9. The intelligent test method based on configuration adaptation according to claim 7, characterized in that: The AC board test content includes zero drift adjustment, scale adjustment, and three groups of AC amplitude and angle values of each channel test; The zero drift and scale are adjusted, then the fixed voltage and current values are read, and whether the board card can meet the precision requirement is calculated and judged according to the read configuration rated values; During the zero drift adjustment, the current source switch matrix circuit and the voltage source switch matrix of the signal source module are disconnected, and the measurement values of each channel are read respectively; during the scale adjustment, the signal source module is controlled to output a rated value, and the measurement values of each channel are read respectively.

10. The intelligent test method based on configuration adaptation according to claim 7, characterized in that: The test content of the input board includes: detecting the voltage of the input board by the optical coupling output of the switch matrix circuit controlled by the switch, and transmitting the change of the input state to the CPU module through the backplane bus after the input board recognizes the change; The test content of the output board includes: controlling the output of the corresponding channel state of the output board by the CPU module, and detecting whether the channel of the output board is normal by the optical coupling input of the switch matrix.

Images