Detection system and method for microcomputer protection device

Abstract

The invention relates to the technical field of microcomputer protection device detection, in particular to a microcomputer protection device detection system and method.The microcomputer protection device detection system comprises a computer host, upper computer software and a detection device, and the detection device is connected with the computer host through at least one industrial standard interface; the detection device is electrically connected with the to-be-detected microcomputer protection device and then detects the to-be-detected microcomputer protection device; the upper computer software runs on the computer host and is used for controlling the detection device according to a preset detection process, performing digital signal and analog signal interaction with the to-be-detected microcomputer protection device through the detection device, and analyzing the digital signal and the analog signal fed back by the to-be-detected microcomputer protection device; automatic detection of a hardware circuit in the microcomputer protection device to be detected is completed; the detection device comprises a combinable probe, the combinable probe is correspondingly connected with an external terminal of the microcomputer protection device to be detected, and the combinable probe is electrically connected with a computer host through an internal board card of the detection device.

Description

Technical Field

[0001] This invention relates to the field of microcomputer protection device testing technology, and specifically to a testing system and method for microcomputer protection devices. Background Technology

[0002] As core equipment ensuring the safe and stable operation of power systems, the performance and reliability of microprocessor-based protection devices directly affect the overall safety of the power grid. Therefore, comprehensive and rigorous testing and inspection must be conducted on these devices before they leave the factory. With the continuous expansion of my country's power system and the ongoing improvement in its intelligence level, the functional requirements for microprocessor-based protection devices are also increasing. To adapt to the operational requirements of complex power grids, modern microprocessor-based protection devices have integrated more advanced protection, monitoring, communication, and control functions, resulting in a more complex hardware structure and a significant increase in the number of acquisition and output ports. While this improves the overall performance of the devices, it also leads to a continuous increase in factory testing items and a more complex testing process, placing higher demands on the coverage and efficiency of testing.

[0003] However, in current testing practices, the testing of hardware circuits and the functions of each port still relies heavily on manual operation, visual observation, and human judgment by inspectors. This traditional testing mode is not only time-consuming and labor-intensive, and prone to subjective errors due to personnel fatigue or differences in experience, but its efficiency bottleneck is becoming increasingly prominent when facing the testing of large batches and multiple models of equipment, making it difficult to adapt to the pace of modern production and the demands of power systems for rapid equipment commissioning.

[0004] Currently, there is no microcomputer-based protection device detection system that integrates automated closed-loop detection, modular probe adaptation, and online calibration functions, and it cannot simultaneously meet the efficiency and accuracy requirements of batch testing.

[0005] In order to overcome the above technical problems, the present invention designs a detection system and method for a microcomputer protection device, which solves the above technical problems. Summary of the Invention

[0006] The technical objective of this invention is to provide a detection system and method for microcomputer protection devices, thereby solving the technical problems of low efficiency, large errors, and poor versatility caused by the reliance on manual operation in the detection of existing microcomputer protection devices.

[0007] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution: A detection system for a microcomputer protection device includes: a computer host, host computer software, and a detection device. The detection device is connected to the computer host through at least one industrial standard interface. The detection device is electrically connected to the microcomputer protection device under test and then performs detection on it. The host computer software runs on the computer host and is used to control the detection device according to the preset detection process. The host computer software and the microcomputer protection device under test exchange data through the standard Modbus-RTU protocol. The detection device exchanges digital and analog signals with the microcomputer protection device under test and can analyze the digital and analog signals fed back by the microcomputer protection device under test to complete the automated detection of the hardware circuit in the microcomputer protection device under test. The detection device includes a combinable probe, which is connected to the external terminal of the microcomputer protection device under test. The combinable probe is electrically connected to the computer host through an internal circuit board of the detection device.

[0008] As one of the preferred options, the combinable probes include mutually independent power supply probe groups, digital signal generation probe groups, analog signal generation probe groups, and signal acquisition probe groups; The power supply probe group supplies power to the microcomputer protection device under test, the digital signal generation probe group generates digital signals, the analog signal generation probe group generates analog signals, and the signal acquisition probe group receives digital and analog signals fed back by the microcomputer protection device under test. The industry standard interface includes at least one of the DB37 interface and the RS485 interface.

[0009] As a preferred embodiment, the computer host is equipped with a multi-functional data acquisition card, specifically mounted on the computer motherboard. The detection device is externally equipped with a PCI board, which is connected to both the computer motherboard and the detection device. Internally, the detection device includes a Total board, a 4-20mA communication board, and a signal source board. Each board is fixed and connected to the signal source via a backplane bus or ribbon cable. The multi-functional data acquisition card is electrically connected to the PCI board, and the PCI board is electrically connected to the Total board inside the detection device, enabling data transmission between the multi-functional data acquisition card and the Total board. The Total board is electrically connected to the 4-20mA communication board, the signal source board, and the combinable probes. The 4-20mA communication board and the signal source board interact with the combinable probes via the Total board.

[0010] As one preferred embodiment, the detection device further includes a pull rod, a fixing module, and a top cover plate; the top cover plate is installed on the top of the main unit chassis of the detection device, the fixing module is installed on the top cover plate, the microcomputer protection device under test is installed on the top of the fixing module, the pull rod is installed on one side of the top cover plate, one end of the pull rod is equipped with the combinable probe, and the pull rod can drive the combinable probe to move horizontally on the top cover plate.

[0011] A detection method for a microcomputer-based protection device based on the above detection system includes the following steps: S1: The host computer software detects the EEPROM of the microcomputer protection device under test through the detection device; S2: The host computer software detects the Flash of the microcomputer protection device under test through the detection device; S3: The host computer software detects the LCD of the microcomputer protection device under test through the detection device; S4: The host computer software detects the key of the microcomputer protection device under test through the detection device. S5: The host computer software detects the LED lights of the microcomputer protection device under test through the detection device; S6: The host computer software detects the digital signal input (input) pins and digital signal output (output) pins of the microcomputer protection device under test through the detection device; S7: The host computer software uses a detection device to test the analog signal acquisition (ADC sampling) function of the microcomputer protection device under test; S8: The host computer software uses a detection device to test the analog signal generation (4-20mA output) function of the microcomputer protection device under test; S9: The host computer software automatically records the results of all test items and judges whether the microcomputer protection device under test is qualified according to the preset standard.

[0012] As one of the preferred solutions, the host computer software sends a memory self-test command and a communication interface-specific test command to the microcomputer protection device under test through the testing device at the beginning of the testing phase, and comprehensively judges whether the communication interface is normal based on the return results of the two sets of commands; when the communication interface is judged to be abnormal, the subsequent testing process is stopped and the test results of the completed test items are recorded.

[0013] As one of the preferred solutions, the host computer software outputs different logic states to the digital signal input pins of the microcomputer protection device under test through the detection device, and reads the corresponding input states through the communication interface to complete the closed-loop detection of the digital signal. When the read input state is consistent with the output logic state, the digital signal input function is determined to be normal. The host computer software controls the digital signal output status of the microcomputer protection device under test. The detection device collects the status of the output pins of the microcomputer protection device under test to complete the closed-loop detection of the digital signal output. When the collected output status is consistent with the controlled output status, the digital signal output function is determined to be normal.

[0014] As a preferred embodiment, the host computer software controls the detection device to output a standard analog signal to the analog signal acquisition pin of the microcomputer protection device under test, and reads the corresponding sampling data through the communication interface to detect the analog signal acquisition function.

[0015] As a preferred option, the host computer software calculates correction parameters based on the read analog signal sampling data, writes the correction parameters into the internal parameters of the microcomputer protection device under test, and then performs another test to determine whether it meets the preset error range.

[0016] As a preferred embodiment, the host computer software controls the detection device to detect the 4-20mA analog signal output function of the microcomputer protection device under test, and performs correction parameter calculation and verification under the 4mA and 20mA output states respectively.

[0017] The beneficial effects of this invention are as follows: 1. This invention achieves fully automated testing of the hardware circuitry of a microcomputer protection device through the coordinated operation of host computer software and a testing device. During the testing process, multiple functions, including memory, display unit, buttons, indicator lights, digital input / output, and analog signal acquisition and output, can be tested simultaneously. This avoids the inefficiencies and high error rates associated with manual wiring and judgment, significantly improving testing consistency and reliability. It is suitable for mass production and factory testing scenarios.

[0018] 2. This invention, by setting up a combinable probe structure and modularizing the power supply, digital signal generation, analog signal generation, and signal acquisition functions, enables the detection device to flexibly adapt to microcomputer protection devices of different models and terminal layouts. Combined with a pull-rod type sliding structure, alignment and connection can be quickly completed without changing the overall tooling, reducing detection preparation time and tooling replacement costs, and improving the versatility and expandability of the detection system.

[0019] 3. This invention introduces a closed-loop detection mechanism combining digital and analog signals during the detection process, and combines this with host computer software to calculate and automatically write correction parameters for sampled data and output current, thereby achieving online calibration and verification of detection accuracy. By performing multi-point detection and correction within critical operating ranges such as 4-20mA, errors caused by device deviations and environmental influences can be effectively reduced, improving the consistency of factory parameters and long-term operational stability of the microcomputer protection device. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the detection system structure of the microcomputer protection device according to an embodiment of this application; Figure 2 This is a schematic diagram of the test process of the detection system of the microcomputer protection device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the detection device in the detection system of the microcomputer protection device according to an embodiment of this application; Figure 4 This is a schematic diagram of the external structure of the detection device in the detection system of the microcomputer protection device according to an embodiment of this application; Figure 5 This is a schematic diagram of the probe body position in the detection system of the microcomputer protection device according to an embodiment of this application.

[0022] In the diagram: 1. Pull rod; 2. Combinable probe; 3. Fixing module; 4. Top cover; 5. Switch; 6. Communication cable; 7. Data cable; 8. Main chassis; 9. Power interface; 10. Probe body. Detailed Implementation

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] Example 1: like Figure 1 As shown, a testing system for a microcomputer protection device includes a computer host, host computer software running on the computer host, and a testing device. The testing device is connected to the computer host through at least one industry standard interface. After being electrically connected to the microcomputer protection device under test, the testing device is used to perform functional testing on the microcomputer protection device under test.

[0025] The host computer software runs on the computer host and is used to control the operation of the testing device according to the pre-set testing process. The host computer software and the microcomputer protection device under test exchange data through the standard Modbus-RTU protocol. The software also generates, acquires and exchanges digital and analog signals with the microcomputer protection device under test through the testing device, thereby testing the hardware circuit function of the microcomputer protection device under test.

[0026] The testing device includes a combinable probe 2, which is connected one-to-one with the external terminals of the microcomputer protection device under test. The combinable probe 2 is electrically connected to the computer host through the circuit board inside the testing device.

[0027] The testing device is connected to the computer host via an RS485 interface and a corresponding communication line 6; the combinable probe 2 is used to connect to the external terminals of the microcomputer protection device under test, so as to realize the interaction of various digital signals and analog signals while supplying power to the microcomputer protection device under test.

[0028] The combinable probe 2 is composed of multiple probe bodies 10, including a probe rod, a flexible reset structure, a signal transfer terminal, and an insulating shell. A single probe body 10 can only achieve unidirectional or bidirectional transmission of one electrical signal, and its physical dimensions match the standard spacing of the external terminals of the microprocessor-based protection device under test. By modularly combining several probe bodies 10 according to the terminal layout of the microprocessor-based protection device under test, probe groups with different functions (such as power supply probe groups, digital signal generation probe groups, etc.) can be formed, achieving flexible adaptation to different models of microprocessor-based protection devices under test.

[0029] The probe body 10 is the smallest unit. One or more probe bodies 10 constitute the probe group below. The combinable probe 2 includes an independently set power supply probe group, a digital signal generation probe group, an analog signal generation probe group, and a signal acquisition probe group. Among them, the power supply probe group is used to supply power to the microcomputer protection device under test, the digital signal generation probe group is used to output digital signals to the microcomputer protection device under test, the analog signal generation probe group is used to output analog signals to the microcomputer protection device under test, and the signal acquisition probe group is used to acquire the digital and analog signals fed back by the microcomputer protection device under test.

[0030] Example 2: Based on the above examples, this example provides the specific internal structure of the detection device.

[0031] like Figure 3As shown, the testing device includes a Total board, a signal source board, and a 4-20mA communication board housed within the device, isolated by an internal casing. A multi-functional data acquisition card is installed inside the computer host and electrically connected to the PCI board, responsible for high-speed acquisition, conversion, and output of digital and analog signals. The PCI board serves as a bridge between the computer host and the testing device, achieving signal isolation and data transmission, and is electrically connected to the Total board inside the testing device. The Total board, as the core of the testing device, undertakes signal aggregation and distribution functions, and is connected to the 4-20mA communication board, the signal source board, and the combinable probe 2. The signal source board provides high-precision analog excitation signals and powers the 4-20mA communication board, which is responsible for the acquisition and communication of 4-20mA signals. The Total board is electrically connected to the signal source board, the 4-20mA communication board, and the combinable probe 2, respectively, to complete the aggregation and distribution of digital and analog signals. The data acquisition port of the Total board is connected to the PCI board via data cable 7. The signal source board is used to output analog signals and provide power to the 4-20mA communication board. The 4-20mA communication board is used to realize the communication and detection of 4-20mA signals, and its communication interface is connected to the RS485 interface on the computer host.

[0032] Example 3: Based on the above examples, this example provides the specific external structure of the detection device.

[0033] like Figure 4-5 As shown, the testing device includes a main chassis 8. A power interface 9 is provided on the side of the main chassis 8. The power interface 9 is connected in series with an external 220V power supply and is used to control the power supply of the entire testing device. A communication line 6 and a data line 7 are provided at the rear of the main chassis 8. A switch 5 is provided at the front of the testing device. The switch 5 is used to control the opening or closing of the testing device.

[0034] A fixing module 3 for placing the microcomputer protection device under test is provided on the top of the testing device. The fixing module 3 is connected to the upper cover plate 4 of the testing device. A combinable probe 2 is also provided on the top of the testing device. The combinable probe 2 is composed of a probe body 10. When it is necessary to change the structure of the combinable probe 2, it can be achieved by replacing the corresponding probe body 10.

[0035] The testing device also includes a pull rod 1, which is installed on one side of the upper cover plate 4. One end of the pull rod 1 is connected to the combinable probe 2, and the pull rod 1 can drive the combinable probe 2 to move horizontally on the upper cover plate 4. In use, the combinable probe 2 is pulled out backward by the pull rod 1, the microcomputer protection device under test is placed and fixed on the fixing module 3, and then the pull rod 1 is pushed to connect the combinable probe 2 to the corresponding pin of the microcomputer protection device under test.

[0036] The host computer software communicates with the microcomputer protection device under test via the Modbus-RTU protocol. Modbus-RTU is an industrial-grade asynchronous communication protocol based on a serial communication bus, and a common branch of the Modbus protocol family. It adopts a master-slave communication architecture, supporting one-to-one or one-to-many device communication; data transmission is in binary form, and the frame structure includes a start bit, address field, function code field, data field, parity field, and stop bit. The parity field uses cyclic redundancy check (CRC16), which has high anti-interference capability.

[0037] In practice, the host computer software sends a preset formatted test or self-test command to the microcomputer protection device under test. After receiving the command, the microcomputer protection device under test parses the command. When it is identified as a valid command, it starts the corresponding test or self-test program and returns the result to the host computer software after the test is completed. When the command cannot be identified, it returns feedback information indicating that the command is wrong.

[0038] At the beginning of the test, the host computer software sends a memory self-test command and a communication interface-specific test command to the microcomputer protection device under test through the testing device, and makes a comprehensive judgment on whether the communication interface is normal based on the return results of the two sets of commands. When the communication interface is determined to be abnormal, the host computer software stops the subsequent testing process and records the test results of the completed test items.

[0039] Example 4: Based on the above examples, this example provides a matching detection method.

[0040] like Figure 2 As shown, after fixing and connecting the microcomputer protection device under test, the testing process is executed through the host computer software. The specific testing method includes the following steps: S1: EEPROM testing steps: The host computer software sends an EEPROM self-test command to the microcomputer protection device under test via serial communication through the testing device; after receiving the command, the microcomputer protection device under test runs the EEPROM self-test program, writes data to the first and last addresses of the EEPROM respectively, reads and compares the data, and returns the self-test result to the host computer software; the host computer software receives and records the test result.

[0041] S2: Flash testing steps: The host computer software sends a Flash self-test command to the microcomputer protection device under test; the microcomputer protection device under test performs write, read and compare operations on the first and last addresses of the Flash, and feeds back the test results to the host computer software; the host computer software records the test results.

[0042] S3: LCD testing steps: The host computer software sends an LCD self-test command to the microcomputer protection device under test; after the device under test performs the self-test, the host computer takes a picture through the camera, and then the judgment can be made by manual visual inspection / image recognition.

[0043] S4: Key detection steps: The host computer software sends key detection commands to the microcomputer protection device under test in sequence, prompting the user to press the specified key; the microcomputer protection device under test determines whether the corresponding key status meets the expectations and feeds back the detection results to the host computer software; until all key detections are completed.

[0044] S5: LED testing steps: The host computer software sends an LED self-test command to the microcomputer protection device under test; after the device under test performs the self-test, the host computer takes a picture through the camera, and then the judgment can be made by manual visual inspection / image recognition.

[0045] S6: Digital signal input detection steps: The host computer software controls the corresponding probes through the detection device to output high and low logic states sequentially to the digital signal input pins of the microcomputer protection device under test, and reads the corresponding input states through the Modbus-RTU protocol to determine whether the digital signal input function is normal.

[0046] Meanwhile, for the digital signal output pins of the microcomputer protection device under test, the host computer software controls the corresponding logic state of its output. The detection device collects the state of the output pins through the signal acquisition probe to complete the closed-loop detection of the digital signal, and compares the collected state with the controlled output state. When the two are consistent, it is determined that the digital signal output function is normal.

[0047] S7: Analog signal acquisition and detection steps: The host computer software controls the detection device to output the rated analog signal to the analog acquisition pin of the microcomputer protection device under test, and reads its ADC sampling data through the communication interface; calculates the correction parameters based on the sampling data and writes them into the internal parameters of the microcomputer protection device under test, and then reads the sampling data again to determine whether it meets the preset error range, which is set to ±0.5%.

[0048] S8: Analog signal output detection steps: The host computer software uses the detection device to detect the 4-20mA analog signal output function of the microcomputer protection device under test. The actual output value is measured in the 4mA and 20mA output states respectively. The correction parameters are calculated based on the measurement results and written into the internal parameters of the microcomputer protection device under test. Then, the detection is performed again to complete the verification.

[0049] S9: Test Result Recording Steps: The host computer software automatically summarizes and records the test results of the above test items, and judges whether the microcomputer protection device under test is qualified according to the preset judgment criteria.

[0050] In steps S6 and S7 of this embodiment, closed-loop detection refers to a detection system actively outputting a standard excitation signal to a specific functional module of the microcomputer protection device under test. The detection system then collects the feedback or output signal of this functional module, and finally compares the collected actual signal with the preset standard excitation signal to determine whether the functional module is functioning correctly. Depending on the detection object, closed-loop detection is divided into digital signal closed-loop detection and analog signal closed-loop detection: the comparison basis for digital signal closed-loop detection is the consistency of the logic state; the comparison basis for analog signal closed-loop detection is whether the error between the actual signal and the standard signal is within a preset range.

[0051] The correction parameter in step S7 refers to the compensation coefficient calculated by the host computer software during the analog signal detection process. This compensation is based on the difference between the acquired actual analog signal and a preset standard analog signal, calculated using a preset calibration algorithm to compensate for hardware component deviations, ambient temperature drift, and inherent errors of the detection system in the microprocessor-based protection device under test. The correction parameter is automatically written into the internal non-volatile memory of the microprocessor-based protection device under test. During actual operation, the microprocessor-based protection device will use this correction parameter to compensate for the acquired or output analog signals in real time, ensuring that its measurement and output accuracy meet the preset technical requirements.

[0052] The calibration algorithm in this embodiment is a linear calibration algorithm, and its calculation formula is: Correction parameter K = Standard signal value S0 / Actual acquired signal value S1. When the microcomputer protection device under test is actually running, the acquired original signal value is multiplied by the correction parameter K to obtain the compensated accurate signal value. It should be noted that this embodiment only provides this one linear calibration algorithm, which does not mean that other calibration algorithms cannot be substituted into the method. Considering that the hardware component deviation, ambient temperature drift, and inherent error of the detection system of the microcomputer protection device under test produced in the same batch are relatively small, the correction parameter K can be obtained by testing the sample and input into the calibration algorithm.

[0053] In this embodiment, the calibration algorithm preferentially adopts the single-point linear proportional calibration algorithm, and the two-point linear calibration algorithm is used for the detection of analog signal output of the 4-20mA communication board.

[0054] Based on the above detection method, this implementation proposes an additional anomaly handling mechanism: when the test results of a certain test item are unqualified for a series of tests, the host computer software automatically marks the item, and the marking content includes the test item name, the number of times it is unqualified and the original test data, and skips the item to continue the subsequent tests. After all tests are completed, a unified prompt for manual re-inspection is given.

[0055] The technical features disclosed above are not limited to combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of this disclosure, in order to achieve the objectives of this disclosure. The description herein is provided to enable those skilled in the art to implement or use the contents of this disclosure. Various modifications to the contents of this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of this disclosure.

Claims

1. A detection system for a microcomputer protection device, characterized in that, include: The system includes a computer host, host computer software, and a testing device. The testing device is connected to the computer host via at least one industry standard interface. The testing device is electrically connected to the microcomputer protection device under test and then performs testing on it. The host computer software runs on the computer host and is used to control the detection device according to the preset detection process. The host computer software and the microcomputer protection device under test exchange data through the standard Modbus-RTU protocol. The detection device exchanges digital and analog signals with the microcomputer protection device under test and can analyze the digital and analog signals fed back by the microcomputer protection device under test to complete the automated detection of the hardware circuit in the microcomputer protection device under test. The detection device includes a combinable probe (2), which is connected to the external terminal of the microcomputer protection device under test. The combinable probe (2) is electrically connected to the computer host through the internal board of the detection device.

2. The detection system of the microcomputer protection device according to claim 1, characterized in that, The combinable probe (2) includes an independent power supply probe group, a digital signal generation probe group, an analog signal generation probe group, and a signal acquisition probe group; the power supply probe group supplies power to the microcomputer protection device under test, the digital signal generation probe group generates digital signals, the analog signal generation probe group generates analog signals, and the signal acquisition probe group is used to receive digital and analog signals fed back by the microcomputer protection device under test. The industry standard interface includes at least one of the DB37 interface and the RS485 interface.

3. The detection system of the microcomputer protection device according to claim 1, characterized in that, The computer host is equipped with a multi-functional data acquisition card, the external part of the detection device is equipped with a PCI board, and the internal part of the detection device is equipped with a Total board, a 4-20mA communication board and a signal source board. The multi-functional data acquisition card is electrically connected to the PCI board, and the PCI board is electrically connected to the Total board inside the detection device to realize data transmission between the multi-functional data acquisition card and the Total board. The Total board is electrically connected to the 4-20mA communication board, the signal source board and the combinable probe (2) respectively. The 4-20mA communication board and the signal source board realize signal interaction with the combinable probe (2) through the Total board.

4. The detection system of the microcomputer protection device according to claim 1, characterized in that, The detection device also includes a pull rod (1), a fixing module (3), and an upper cover plate (4); the upper cover plate (4) is installed on the top of the main unit chassis of the detection device, the fixing module (3) is installed on the top of the upper cover plate (4), the microcomputer protection device under test is installed on the top of the fixing module (3), the pull rod (1) is installed on one side of the upper cover plate (4), and the combinable probe (2) is installed at one end of the pull rod (1). The pull rod (1) can drive the combinable probe (2) to move horizontally on the upper cover plate (4).

5. A method for detecting a microcomputer-based protection device based on the detection system according to any one of claims 1-4, characterized in that, Includes the following steps: S1: The host computer software detects the EEPROM of the device under test through the detection device; S2: The host computer software detects the Flash memory of the device under test through the detection device; S3: The host computer software detects the LCD of the device under test through the detection device; S4: The host computer software detects the key of the device under test through the detection device. S5: The host computer software detects the LED lights of the device under test through the detection device; S6: The host computer software detects the digital signal input (input) pins and digital signal output (output) pins of the device under test through the detection device; S7: The host computer software uses the detection device to detect the analog signal acquisition (ADC sampling) function of the device under test; S8: The host computer software detects the analog signal generation (4-20mA output) function of the device under test through the detection device; S9: The host computer software automatically records the results of all test items and judges whether the microcomputer protection device under test is qualified according to the preset standard.

6. The detection method for the microcomputer protection device according to claim 5, characterized in that, At the beginning of the testing phase, the host computer software sends a memory self-test command and a communication interface-specific test command to the microcomputer protection device under test through the testing device, and comprehensively judges whether the communication interface is normal based on the return results of the two sets of commands; when the communication interface is judged to be abnormal, the subsequent testing process is stopped and the test results of the completed test items are recorded.

7. The detection method for the microcomputer protection device according to claim 6, characterized in that, The host computer software outputs different logic states to the digital signal input pins of the microcomputer protection device under test through the detection device, and reads the corresponding input states through the communication interface to complete the closed-loop detection of digital signals. When the read input state is consistent with the output logic state, the digital signal input function is determined to be normal. The host computer software controls the digital signal output status of the microcomputer protection device under test. The detection device collects the status of the output pins of the microcomputer protection device under test to complete the closed-loop detection of the digital signal output. When the collected output status is consistent with the controlled output status, the digital signal output function is determined to be normal.

8. The detection method for the microcomputer protection device according to claim 6, characterized in that, The host computer software controls the detection device to output a standard analog signal to the analog signal acquisition pin of the microcomputer protection device under test, and reads the corresponding sampling data through the communication interface to detect the analog signal acquisition function.

9. The detection method for the microcomputer protection device according to claim 8, characterized in that, The host computer software calculates correction parameters based on the read analog signal sampling data, writes the correction parameters into the internal parameters of the microcomputer protection device under test, and then performs another test to determine whether it meets the preset error range.

10. The detection method for the microcomputer protection device according to claim 6, characterized in that, The host computer software controls the detection device to detect the 4-20mA analog signal output function of the microcomputer protection device under test, and performs correction parameter calculation and verification under the 4mA and 20mA output states respectively.

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