Automatic test system and method for five-wire system turnout driver board card

Abstract

The invention discloses an automatic test system and method for a five-wire system turnout driver board card PDDM5, and the system comprises an intelligent load simulation unit which is connected with the drive output end of a tested PDDM5 board card, and simulates the positioning state, the anti-position state and the conversion process of a turnout; the abnormal voltage injection unit is connected with the acquisition input end of the PDDM5 board card and provides programmable voltage to simulate normal and abnormal working conditions; the independent state acquisition unit is used for acquiring turnout physical position state signals output by the intelligent load simulation unit; the automatic test platform is in communication connection with the above units and the PDDM5 board card, and is used for issuing a driving command to the PDDM5 board card and synchronously receiving a self acquisition state and an independently acquired load physical state from the PDDM5 board card; and a test result is automatically judged by comparing the consistency of the two. Compared with the prior art, reliable and automatic verification of driving and acquisition logic cooperation correctness of the PDDM5 board card is realized through two-way state synchronous acquisition and consistency comparison.

Description

Technical Field

[0001] This invention relates to the field of railway signaling equipment systems, and in particular to an automated testing system and method for a five-wire turnout drive board. Background Technology

[0002] The five-wire turnout drive board (PDDM5) is the core drive and acquisition component in the fully electronic interlocking system. It is mainly responsible for receiving control commands to drive the turnout switch machine to switch, and for acquiring the voltage of the actual position of the turnout to determine its status, such as positioning or reversal. The reliability of its drive and acquisition functions is directly related to the safety and efficiency of rail transit.

[0003] Currently, the testing and verification of the PDDM5 board mainly relies on manual operation in conjunction with a real turnout switch machine or a simple simulated load. The existing testing methods have the following shortcomings: (1) The testing process relies heavily on manual cable plugging and unplugging, manual power supply adjustment, voltage and current measurement, and observation of indicator lights, resulting in low testing efficiency and easy human error; (2) It is difficult to simulate complex drive and acquisition fault scenarios, such as cable breakage, switch machine jamming, and abnormal voltage, resulting in incomplete test case coverage; (3) It is impossible to automatically record and accurately judge the time sequence, dynamic logic, and protection logic under abnormal voltage during the turnout switching process; (4) The test results depend on the subjective experience of the testers, resulting in poor consistency and traceability. These problems restrict the efficiency of PDDM5 board research and development, debugging, factory inspection, and on-site maintenance.

[0004] A search revealed Chinese Patent Publication No. CN107831392A, which discloses a fully electronic interlocking hardware intelligent testing system. This system includes an industrial control computer, a programmable power supply, a load box, a signal conditioning box, and a chassis containing a gold-plated EIOCOM2 and various boards under test. The industrial control computer sends control commands to the chassis under test via the TFTP protocol and receives status and test data collected and reported by the boards under test themselves via the gold-plated EIOCOM2, thereby achieving automated testing of the interlocking board functions. However, the system's status feedback relies on the board under test's own data acquisition and reporting pathways, lacking a status verification mechanism independent of the tested object. Therefore, it cannot effectively identify erroneous status reports caused by faults in the board's own acquisition circuitry or internal logic, limiting the reliability of the test results and the depth of fault diagnosis.

[0005] Therefore, how to achieve reliable automated verification of the correctness of the coordination between the driving and acquisition logic in the automated testing of five-wire turnout drive boards is a technical problem that needs to be solved. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art and provide an automated testing system and method for a five-wire turnout drive board.

[0007] The objective of this invention can be achieved through the following technical solutions: According to a first aspect of the present invention, an automated testing system for a five-wire turnout drive board is provided, comprising: The intelligent load simulation unit is connected to the drive output terminal of the PDDM5 five-wire turnout drive board under test to simulate the turnout's positioning state, reverse position, and the conversion process between the two. An abnormal voltage injection unit is connected to the acquisition input terminal of the five-wire turnout drive board PDDM5, providing a programmable voltage signal to simulate the voltage under normal and abnormal operating conditions of the circuit. An independent status acquisition unit, connected to the intelligent load simulation unit, is used to acquire the status signal representing the physical position of the turnout output by the intelligent load simulation unit. The automated testing platform is communicatively connected to the abnormal voltage injection unit, the independent status acquisition unit, and the five-wire turnout drive board PDDM5, respectively. The automated testing platform is configured to: issue drive commands to the five-wire turnout drive board PDDM5, and simultaneously receive the self-acquisition status from the five-wire turnout drive board PDDM5 and the load physical status from the independent status acquisition unit; based on the consistency comparison between the self-acquisition status and the load physical status, automatically determine the test result of the five-wire turnout drive board PDDM5.

[0008] As a preferred technical solution, the intelligent load simulation unit includes an intelligent five-wire turnout load board, which is equipped with a state machine control module and a relay drive circuit. The state machine control module is configured to: when a positioning drive voltage is detected, control the relay drive circuit to enter the positioning state and output a first state signal; when a reverse position drive voltage is detected, control the relay drive circuit to enter the reverse position indication state and output a second state signal; and after the drive voltage is switched, control the relay drive circuit to undergo an intermediate conversion process.

[0009] As a preferred technical solution, the state machine control module includes a timer to control the relay drive circuit to maintain a preset simulated conversion delay during the intermediate conversion process. The set value of the simulated conversion delay matches the standard conversion time of a real turnout.

[0010] As a preferred technical solution, the abnormal voltage injection unit is a programmable DC power supply, which receives digital instructions from the automated test platform and outputs a continuously adjustable or step-adjustable DC voltage within the range of 0V to a set maximum value to simulate overvoltage, undervoltage, normal, and disconnection states.

[0011] As a preferred technical solution, the automated testing platform performs fault diagnosis testing, specifically including: controlling the output voltage of the programmable DC power supply to gradually change from the normal value to above the preset overvoltage alarm threshold or below the undervoltage alarm threshold; and monitoring whether the five-wire turnout drive board PDDM5 reports the corresponding overvoltage or undervoltage alarm information through the communication board.

[0012] As a preferred technical solution, the independent status acquisition unit is a programmable logic controller, whose input interface is connected to the status signal output terminal of the intelligent load simulation unit, and is used to convert the received level signal into a logic signal and upload it to the automated test platform.

[0013] As a preferred technical solution, the consistency comparison includes a logical correctness determination, specifically: determining whether, in the same test case, the self-collection status of the five-wire turnout drive board PDDM5 and the load physical status received from the independent status acquisition unit represent the same turnout position and are consistent with the expected drive command issued.

[0014] As a preferred technical solution, the consistency comparison further includes time characteristic determination, specifically: recording the first moment when the drive command is issued through the communication board, and the second moment when the physical state of the corresponding load changes after being received from the independent state acquisition unit; calculating the difference between the second moment and the first moment as the conversion delay, and determining whether the conversion delay falls within the preset standard time interval.

[0015] As a preferred technical solution, the automated testing platform also includes a report generation module, which is used to automatically record and store the driving commands for each test, the self-collection status of the five-wire turnout drive board PDDM5, the physical status of the load, the timestamps of each event, the logical judgment results, the time judgment results and the fault alarm information, and generate a structured test report.

[0016] According to a second aspect of the present invention, an automated testing method based on the system is provided, the method comprising: The abnormal voltage injection unit outputs a normal indication voltage. The automated testing platform issues conversion commands from positioning to reverse or from reverse to positioning. The automated testing platform synchronously records the command issuance time and collects dual-channel status feedback; Based on the consistency comparison results of the dual-path states and the conversion delay determination results, a comprehensive judgment is made on whether the driving logic and conversion timing are correct. The abnormal voltage injection unit controls the output of the abnormal voltage indication voltage; The automated testing platform monitors whether the five-wire turnout drive board PDDM5 reports specific alarm information corresponding to the abnormal voltage within a preset time to determine whether its fault diagnosis function is normal.

[0017] As a preferred technical solution, the intelligent load simulation unit changes its output load physical state signal only after receiving the driving voltage and undergoing an analog conversion delay set by an internal timer.

[0018] Compared with the prior art, the present invention has the following advantages: 1. This invention introduces an independent state acquisition unit to obtain objective physical load status and performs real-time automatic comparison with the PDDM5 board's own acquisition status, constructing a dual-path independent feedback verification mechanism. This mechanism can effectively identify error reporting caused by internal acquisition or logic faults of the board, and realize reliable and closed-loop verification of the correctness of the PDDM5 board driver and acquisition logic coordination.

[0019] 2. This invention provides a programmable voltage signal through an abnormal voltage injection unit, which can accurately simulate and represent all operating conditions such as normal circuit, overvoltage, undervoltage, and open circuit. It can automatically verify the fault diagnosis and alarm functions of the PDDM5 board, and the test coverage is comprehensive and can be flexibly expanded.

[0020] 3. The automated testing platform of the present invention can simultaneously collect dual-path status and record key timestamps, automatically determine logical correctness, accurately calculate turnout switching delay, and realize automated verification of dynamic timing characteristics.

[0021] 4. This invention eliminates the need for manual cable plugging / unplugging, power adjustment, or manual data recording throughout the entire process, effectively reducing reliance on manual labor, improving testing efficiency, and automatically retaining complete test data and generating reports to ensure the consistency and traceability of test results. Attached Figure Description

[0022] Figure 1 This is a system architecture diagram of the present invention; Figure 2 This is a schematic diagram of the functional units and interactions of the automated testing platform of the present invention; Figure 3 This is a flowchart of the automated testing method of the present invention; Detailed Implementation

[0023] 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 some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] Example 1: like Figure 1 As shown, this invention provides an automated testing system for a five-wire turnout drive board, used for fully automated and highly reliable verification of the drive, data acquisition, fault diagnosis, and collaborative logic functions of the PDDM5 board. The automated testing system includes the following core components: Test object: PDDM5 five-wire turnout drive board The PDDM5 board is a key drive and acquisition component in the fully electronic interlocking system. It has a drive output interface and an acquisition input interface. The board connects to the communication system through the internal CAN bus, receives drive commands, and uploads the turnout status it has acquired, such as the position and reverse position, as well as various alarm information. Intelligent five-wire turnout load plate: As an intelligent load simulation unit, its core function is to simulate the electrical characteristics and timing of a real five-wire turnout. Internally, it includes a state machine control module and a relay drive circuit. When the positioning drive voltage output from the PDDM5 board is detected, the state machine control module controls the relay group to operate, simulating the turnout switching to the positioning indication state. It outputs a continuous first state signal through its state signal output terminal; for example, a set of normally open contacts closes, outputting a 24V high level. When the reverse position drive voltage is detected, it simulates switching to the reverse position indication state, outputting a second state signal; for example, another set of normally open contacts closes. Its state machine control module has a built-in timer. When the drive voltage switches, it controls the relay drive circuit to operate according to a preset timing sequence, simulating the intermediate process of the turnout's mechanical switching. It maintains a preset simulation switching delay before changing the final output state signal, thus realistically simulating the physical operation of the turnout.

[0025] PLC controller module: As an independent status acquisition unit, its digital input channel is directly connected to the status signal output terminal of the intelligent load board. The function of the PLC is to acquire the level signal output by the load board that represents the final physical position of the turnout, i.e., the first or second status signal, convert it into a 0 or 1 logic signal, and then upload it to the automated testing platform via the network.

[0026] Programmable power supply module: As an abnormal voltage injection unit, its output terminal is connected to the acquisition input terminal of the PDDM5 board. It receives digital commands sent by the automated test platform through the network and can output continuously adjustable or step-adjustable DC voltage within the range of 0V to the set maximum value. Its core function is to simulate the voltage of the turnout indication circuit under various operating conditions: output normal indication voltage; or accurately output abnormal voltages such as overvoltage, undervoltage, and open circuit according to the test case requirements, so as to verify the fault diagnosis capability of the PDDM5 board.

[0027] Communication board: This board serves as a dedicated communication gateway, connecting to the automated testing platform via Ethernet on one end and to the PDDM5 board via an internal CAN bus on the other. Its core function is to realize protocol conversion and command data forwarding between the testing platform and the PDDM5 board: forwarding the turnout drive commands issued by the testing platform to the PDDM5 board; and forwarding the data such as the self-acquisition status and alarm information reported by the PDDM5 board to the testing platform.

[0028] Automated testing platform: This platform is an industrial control computer that runs automated testing software based on languages ​​such as Python. Its software architecture includes: Test script engine: Stores and executes pre-written test case scripts, controlling the entire testing process; Interlocking simulator module: Simulates the logic of a real interlocking system, generates and issues driving commands such as positioning operation and reverse position operation; Equipment control module: controls the output voltage of the programmable power supply module via Ethernet; exchanges data with the PLC via communication protocols; Data acquisition and buffering module: synchronously receives timestamps and records the PDDM5's own status data from the EIOCOM communication board, the load physical status data from the PLC, and the command issuance time; Result Analyzer Module: Executes the core decision logic, including logic correctness determination and time characteristic determination; Report Generator Module: Automatically records all test data and decision results, and generates structured test reports, such as HTML or PDF formats.

[0029] The internal functional modules of the automated testing platform and their data interaction relationships with external systems are as follows: Figure 2 As shown, the test injection control unit inside the platform is responsible for coordinating the test process and issuing instructions to the interlocking lower-level simulator, abnormal voltage injection unit, and independent status acquisition unit; the data acquisition and buffer module synchronously receives feedback from the system under test; the result analyzer module completes the comparison and judgment; and finally, the report generator module outputs the results.

[0030] System workflow: The test platform sends drive commands to the PDDM5 via EIOCOM. The PDDM5 drives the intelligent load board to operate, and the final physical state of the load board is collected and reported by the PLC. At the same time, the PDDM5 collects the voltage provided by the programmable power supply and reports its own collected status via EIOCOM. The test platform simultaneously acquires these two independent status information channels, compares and analyzes them, and automatically generates test conclusions. By controlling the programmable power supply, various voltage faults can be automatically injected to test the fault diagnosis capability of the PDDM5.

[0031] The system of this invention uses an independent state acquisition unit to obtain the objective physical state of the load, and performs real-time consistency comparison and time characteristic analysis with the internal acquisition state reported by the driver board itself on an automated testing platform, thereby realizing comprehensive automated verification of the reliability of the board driver, acquisition and its collaborative logic.

[0032] Example 2: like Figure 3 As shown, the present invention provides an automated testing method for a five-wire turnout drive board of the above-mentioned system, comprising: Step S1: System configuration and initialization. Connect the PDDM5 board to the test system, establish its connection with the intelligent load board, programmable power supply, communication board and PLC, start the automated test platform, load the test case set, and set the initial parameters for the programmable power supply, PLC and other devices. Step S2: Test command issuance and execution. The automated test platform issues specific drive commands to the PDDM5 through the communication board according to the currently executed test case; at the same time, it can control the programmable power supply to output the corresponding display voltage. Step S3: Dual-channel status synchronous acquisition. After the excitation is applied, the automated test platform synchronously acquires two independent status feedback information channels: one channel is the status and alarm data acquired and reported by the PDDM5 itself through the communication board; the other channel is the digital status signal representing the actual physical location of the intelligent load board received from the PLC controller through the network. The platform adds a precise timestamp to all key events. Step S4: Automated analysis and comprehensive judgment. The automated testing platform compares and analyzes the collected dual-channel information, and the judgment criteria include: Logical correctness: Determine whether the status reported by PDDM5 is consistent with the physical status of the load fed back by the PLC, and whether it meets the expectations of the drive command; Time characteristics: Calculate the actual time delay from the issuance of the driver command to the change of load state, and determine whether it meets the preset time specification; Fault diagnosis effectiveness: When the injected voltage is abnormal, determine whether PDDM5 generates the corresponding alarm information in a timely and accurate manner.

[0033] Step S5: Result recording and report generation. The automated testing platform automatically records all commands, statuses, time data, analysis processes, and final judgment results during the testing process into the database and generates a structured test report, completing one test cycle.

[0034] The method of this invention controls initialization and abnormal voltage injection, issues drive commands and simultaneously collects the self-reported status of the drive board and the independent physical status of the load, and then automatically compares and judges the logical correctness and action timing of these two statuses, and finally automatically generates test results. This method efficiently completes full-scenario automated testing from normal function to fault diagnosis through a closed-loop cross-validation mechanism.

[0035] The method of this invention will be specifically explained below using two typical test scenarios as examples: Scenario 1: Test of turnout normal positioning to reverse position drive This scenario is used to verify the correctness of the PDDM5 board driver function, its action logic, and the conversion time.

[0036] System initialization: Start all devices, establish communication connections, the automated test platform runs test scripts, and controls the programmable power supply to output a standard voltage, such as DC 220V; Setting the initial state: The test script queries the PDDM5 status through the interlock simulator to confirm that its acquisition status is in the positioning state. At the same time, it confirms that the intelligent load board status fed back by the PLC is in the positioning position. The test platform generates a reverse operation command through the interlock simulator and sends it to the PDDM5 board via the EIOCOM communication board and CAN bus. The test platform accurately records the time T1 when the command is sent. Drive execution and load simulation: After receiving the command, the PDDM5 board outputs the drive voltage to the reverse drive terminal. The intelligent load board detects the voltage, its state machine starts, controls the relay group to act according to the preset timing sequence, simulates the turnout switching process, and stabilizes in the reverse position indication state after the simulation switching delay controlled by the internal timer ends, and switches the output signal to the second state signal. Dual-channel synchronous status acquisition: The PLC monitors the load board output in real time. When a level change is detected, the inverted bit logic signal is immediately uploaded to the test platform, and the platform records the PLC status change time T2. At the same time, the acquisition circuit of the PDDM5 board should detect the valid inverted bit indication voltage and report its own acquisition status as inverted through the EIOCOM communication board. The platform records the time when the status is received T3. Automated Analysis and Judgment: The test platform's result analyzer performs automatic judgment. Logical correctness determination: Check whether the status received from EIOCOM is reversed and whether the status received from PLC is reversed to the correct position. If both are true, the logic is correct. Time characteristic determination: Calculate the conversion delay ΔT = T2 - T1, and determine whether ΔT is within the preset standard range, such as 2.0 seconds to 3.5 seconds.

[0037] Generate test results: The report generator automatically records all data of this test (commands, status feedback, time parameters) and generates a structured test report that indicates whether the test passed or failed. If the test fails, the specific reason will be marked, such as logical state error or driver timeout.

[0038] Scenario 2: Test for abnormal voltage acquisition of turnouts This scenario is used to verify the diagnostic and alarm functions of the PDDM5 board under abnormal voltage acquisition conditions.

[0039] Initial state settings: System initialization, so that the turnout is in a stable positioning indication state, the programmable power supply outputs normal voltage, such as DC 100V, and the PLC feedback load status is that the position is in place.

[0040] Injecting abnormal voltage: The test script controls the programmable power supply module to gradually increase the output voltage from the normal value to above the preset overvoltage alarm threshold, such as DC 150V.

[0041] Synchronous monitoring and judgment: The automated test platform performs synchronous monitoring: through the EIOCOM communication unit, it monitors whether the PDDM5 board reports and collects overvoltage alarm information within a preset time. The PLC channel was used to confirm that the physical state of the load board remained in the correct position, thus eliminating the possibility of driver malfunction. Automatic result determination: If the PDDM5 board correctly reports the corresponding alarm information, it is determined that its overvoltage diagnosis function is normal, the test is passed, and the platform records the actual voltage value and response time that triggered the alarm. Extended testing: The test script can automatically control the programmable power supply to simulate undervoltage conditions, such as DC 60V and 0V due to disconnection, repeat synchronous monitoring and judgment and automatic result judgment steps, and complete the batch automated execution and judgment of a series of abnormal test cases.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automated testing system for a five-wire turnout drive board, characterized in that, include: The intelligent load simulation unit is connected to the drive output terminal of the PDDM5 five-wire turnout drive board under test to simulate the turnout's positioning state, reverse position, and the conversion process between the two. An abnormal voltage injection unit is connected to the acquisition input terminal of the five-wire turnout drive board PDDM5, providing a programmable voltage signal to simulate the voltage under normal and abnormal operating conditions of the circuit. An independent status acquisition unit, connected to the intelligent load simulation unit, is used to acquire the status signal representing the physical position of the turnout output by the intelligent load simulation unit. The automated testing platform is communicatively connected to the abnormal voltage injection unit, the independent status acquisition unit, and the five-wire turnout drive board PDDM5, respectively. The automated testing platform is configured to: issue drive commands to the five-wire turnout drive board PDDM5, and simultaneously receive the self-acquisition status from the five-wire turnout drive board PDDM5 and the load physical status from the independent status acquisition unit; based on the consistency comparison between the self-acquisition status and the load physical status, automatically determine the test result of the five-wire turnout drive board PDDM5.

2. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The intelligent load simulation unit includes an intelligent five-wire turnout load board, which is equipped with a state machine control module and a relay drive circuit. The state machine control module is configured to: when a positioning drive voltage is detected, control the relay drive circuit to enter the positioning state and output a first state signal; when a reverse position drive voltage is detected, control the relay drive circuit to enter the reverse position indication state and output a second state signal; and after the drive voltage is switched, control the relay drive circuit to undergo an intermediate conversion process.

3. The automated testing system for a five-wire turnout drive board according to claim 2, characterized in that, The state machine control module includes a timer that controls the relay drive circuit to maintain a preset simulated conversion delay during the intermediate conversion process. The set value of the simulated conversion delay matches the standard conversion time of a real turnout.

4. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The abnormal voltage injection unit is a programmable DC power supply that receives digital instructions from the automated test platform and outputs a continuously adjustable or step-adjustable DC voltage within the range of 0V to a set maximum value to simulate overvoltage, undervoltage, normal, and disconnection states.

5. The automated testing system for a five-wire turnout drive board according to claim 4, characterized in that, The automated testing platform performs fault diagnosis tests, specifically including: controlling the output voltage of the programmable DC power supply to gradually change from the normal value to above the preset overvoltage alarm threshold or below the undervoltage alarm threshold; and monitoring whether the five-wire turnout drive board PDDM5 reports the corresponding overvoltage or undervoltage alarm information through the communication board.

6. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The independent status acquisition unit is a programmable logic controller (PLC). Its input interface is connected to the status signal output terminal of the intelligent load simulation unit. It is used to convert the received level signal into a logic signal and upload it to the automated test platform.

7. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The consistency comparison includes a logical correctness determination, specifically: determining whether, in the same test case, the self-collected state of the five-wire turnout drive board PDDM5 and the load physical state received from the independent state collection unit represent the same turnout position and are consistent with the expected drive command issued.

8. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The consistency comparison also includes time characteristic determination, specifically: recording the first moment when the drive command is issued through the communication board, and the second moment when the physical state of the corresponding load changes after being received from the independent state acquisition unit; calculating the difference between the second moment and the first moment as the conversion delay, and determining whether the conversion delay falls within the preset standard time interval.

9. The automated testing system for a five-wire turnout drive board according to claim 1, characterized in that, The automated testing platform also includes a report generation module, which is used to automatically record and store the driving commands for each test, the self-collection status of the five-wire turnout drive board PDDM5, the physical status of the load, the timestamps of each event, the logical judgment results, the time judgment results and the fault alarm information, and generate a structured test report.

10. An automated testing method based on the system according to any one of claims 1-9, characterized in that, include: The abnormal voltage injection unit outputs a normal indication voltage. The automated testing platform issues conversion commands from positioning to reverse or from reverse to positioning. The automated testing platform synchronously records the command issuance time and collects dual-channel status feedback; Based on the consistency comparison results of the dual-path states and the conversion delay determination results, a comprehensive judgment is made on whether the driving logic and conversion timing are correct. The abnormal voltage injection unit controls the output of the abnormal voltage indication voltage; The automated testing platform monitors whether the five-wire turnout drive board PDDM5 reports specific alarm information corresponding to the abnormal voltage within a preset time to determine whether its fault diagnosis function is normal.

11. The automated testing method according to claim 10, characterized in that, After receiving the driving voltage, the intelligent load simulation unit changes its output load physical state signal only after a simulation conversion delay set by an internal timer.

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