Full-process automatic measuring method for high temperature reactor protection system logic decision duration

Abstract

The application is a full-process automatic measurement method for the logic decision duration of high-temperature reactor protection system, belonging to the technical field of nuclear reactor safety test method. After selecting the test project, load parameters and output reference signals, automatically check auxiliary state signals during the stable period; output trigger signals, collect input signals and identify the starting point T1; synchronously collect output shutdown or special signals, record the ending point T2, calculate DT = T2-T1; compare DT with the qualified criterion, output the results, restore the signals and check; record the test time, personnel, channel, T1, T2, DT and results, and the time stamp is stored in an unalterable way. The application realizes automatic checking, accurate timing and unalterable storage.

Description

Technical Field

[0001] This invention relates to the field of nuclear reactor safety testing methods, and in particular to a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system. Background Technology

[0002] As a fourth-generation nuclear power reactor with inherent safety, the high-temperature gas-cooled reactor's reactor protection system is a critical safety system ensuring the reactor's safe operation under various conditions. The protection system response time test, including multiple specialized tests such as high nuclear power, high temperature, pressure anomalies, flow ratio exceeding limits, manual shutdown, and manual isolation, is a legally mandated periodic test to verify the protection system's performance and meet nuclear safety regulations. The accuracy and reliability of the test results directly affect the reactor's safety assessment.

[0003] Currently, the measurement of response time in high-temperature reactor protection systems generally relies on manual operation. Specifically, test triggering involves operators manually applying excitation signals, response signal readings depend on manual observation of instruments or oscilloscopes, test data is recorded manually, and pass / fail determination is based on personnel comparing data against experience or written procedures. This manually-driven measurement mode has significant technical shortcomings. First, operational efficiency is low. Due to the numerous test items and channels, each test requires repeated, tedious steps such as manual triggering, reading, recording, and judgment, resulting in a long overall test cycle and making it difficult to meet the time window requirements for periodic testing. Second, test standardization is insufficient. Existing methods lack standardized process guidance, leading to differences in the timing of operations and reading interpretation among different operators. Furthermore, they do not support automatic verification of pre-conditions or automatic judgment of result pass / fail, making it easy for human error to introduce misjudgments or omissions, affecting the consistency and reliability of the test.

[0004] Therefore, there is an urgent need to develop a fully automated, high-precision, highly adaptable, and highly reliable method for measuring the response time of high-temperature reactor protection systems in order to overcome the aforementioned shortcomings of existing technologies. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To address this, this invention proposes a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system. This method automatically loads measurement parameters based on selected test items and forces the output of a reference signal. During the stable period, auxiliary status signals are collected for automatic verification. Trigger signals are output according to the test logic, and the trigger start time T1 is automatically identified and recorded based on the signal type. Simultaneously, shutdown or dedicated action signals output by the protection system are collected, the response end time T2 is recorded, and the response time ΔT is calculated. ΔT is compared with the pass / fail criteria, the judgment result is output, the output signal is restored, and verification is performed again. Test data is automatically recorded and stored in an immutable format with a timestamp. This invention achieves fully automated measurement, improving test efficiency, standardization, and result traceability.

[0007] To achieve the above objectives, this invention proposes a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system, comprising:

[0008] Based on the selected test items, the corresponding measurement parameters are automatically loaded, and a reference signal is forcibly output to the protection system under test and kept stable. During the stabilization period, auxiliary status signals are collected for automatic verification. If the verification fails, the test is terminated and an alarm is triggered. If the verification passes, the next step is executed. According to the test logic, a step or ramp trigger signal is output to the protection system under test, and the input signal is acquired in real time at a preset acquisition frequency; the moment when the input signal reaches the trigger condition is automatically identified and recorded as the trigger start time T1 according to the signal type. Synchronously acquire the shutdown signal or dedicated action signal output by the protection system under test due to triggering, record the moment when the corresponding output signal changes as the response endpoint time T2, and calculate the response time ΔT = T2 - T1; The calculated ΔT is compared with the preset upper limit of the pass / fail criterion, and the result of the test pass or fail is output. Then the output signal is restored to the preset safe recovery value, and the shutdown signal and action signal are verified again to confirm that they have disappeared; otherwise, an alarm is issued. The system automatically records the test time, test personnel, channel identifier, trigger threshold, T1, T2, ΔT, judgment results, and operation logs generated during the test. These data are timestamped and stored in an immutable format for full traceability of the test.

[0009] The fully automated measurement method for the logic decision duration of the high-temperature reactor protection system according to embodiments of the present invention may also have the following additional technical features: In one embodiment of the present invention, automatically loading the corresponding measurement parameters includes: The system acquires the user-selected test channel identifier, signal type, trigger threshold, signal change rate threshold, signal recovery value, data acquisition frequency, and upper limit value of the pass / fail criterion, and loads these parameters into the measurement control unit. The measurement and control unit configures the trigger identification logic based on the signal type and the trigger threshold, sets the sampling clock according to the data acquisition frequency, and finally returns a status indicator indicating that the configuration is complete.

[0010] In one embodiment of the present invention, forcibly outputting a reference signal to the protection system under test and maintaining its stability includes: The measurement and control unit outputs a preset reference signal value through the signal output channel and continuously outputs a value no less than the preset threshold. During this period, the shutdown signal and action signal fed back by the protection system under test are continuously acquired at the data acquisition frequency. If any non-zero or abnormal state signal is detected, the stability is determined to have failed and an alarm is issued. Otherwise, a stability success indicator is generated.

[0011] In one embodiment of the present invention, the automatic verification of the auxiliary status signal includes: Auxiliary status signals are obtained from the protection system under test. The auxiliary status signals include B6 signal, P10 signal and shutdown signal. The current state of each signal is compared with the preset test start condition one by one. The test start condition is that all auxiliary state signals are in a no-signal state. If all match, the next step is allowed to continue. Otherwise, the test is terminated and a verification failure alarm is output.

[0012] In one embodiment of the present invention, automatically identifying and recording the moment when the input signal reaches the trigger condition as the trigger start time T1 according to the signal type includes: Real-time acquisition of analog signal values ​​or switch signal level status; If the signal type is analog, compare the real-time signal value with the preset trigger threshold. When the signal value changes from less than the threshold to greater than or equal to the threshold, record the corresponding time as T1. If the signal type is digital, detect the rising edge of the signal and record the time when the level changes from low to high as T1. If the signal type is rate of change exceeding the limit, continuously calculate the rate of change of the signal between two adjacent samples. Record the time when the rate of change first reaches or exceeds the preset rate of change threshold as T1. Save T1 to the storage unit.

[0013] In one embodiment of the present invention, synchronously acquiring the shutdown signal or dedicated action signal output by the protection system under test due to triggering includes: Acquire the logic level of the shutdown signal or dedicated action signal output by the protection system under test, and sample synchronously at the same data acquisition frequency as the input signal; The rising or falling edge of the corresponding output signal is detected, and the sampling time at which the output signal first changes state is recorded as the response endpoint time T2.

[0014] In one embodiment of the present invention, restoring the output signal to a preset safe recovery value and re-verifying that the shutdown signal and action signal have disappeared includes: The measurement and control unit adjusts the output signal value from the threshold state or the rate of change exceeding the limit state after triggering to the preset safe recovery value through the signal output channel; after the output is restored, the shutdown signal and action signal of the protected system under test are reacquired, and the acquired signal value is compared with the zero or no action state value; if all signals indicate no shutdown and no action, the state is confirmed to have returned to normal; otherwise, an alarm signal is continuously issued.

[0015] In one embodiment of the present invention, it further includes: After completing the recording and signal recovery verification of the trigger start time T1 and response end time T2 of the first channel, keep the output signal of the first channel unchanged at the safe recovery value, and switch to the second channel; Repeat all sub-steps of the second channel, including reference signal output, pre-state verification, trigger signal output, start and end time capture, response time calculation, qualification judgment and signal recovery verification, until all selected channels have completed the measurement; finally, summarize and output the measurement result dataset of each channel.

[0016] In one embodiment of the present invention, the test time, test personnel, channel identifier, trigger threshold, T1, T2, ΔT, judgment result, and operation log generated during the test are automatically recorded, and these data are timestamped and stored in an immutable format, including: The test time, test personnel, channel identification, trigger threshold, T1, T2, ΔT, judgment results and operation logs are organized into structured data records; Each record is appended with a timestamp and a digital checksum and written to an append-only storage medium, prohibiting modification or deletion of the written data; Simultaneously, test curve images are generated based on T1 and T2. The curve images are plotted with time on the horizontal axis and signal amplitude on the vertical axis, and the positions of the trigger start point and response end point are marked on the curve images.

[0017] In one embodiment of the present invention, the data acquisition frequency is 1ms by default, and the upper limit of the qualification criterion, the signal change rate threshold, and the safety recovery value are automatically called from the pre-configured test procedure database according to the selected test items.

[0018] This invention presents a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system. By automatically loading measurement parameters and forcibly outputting a reference signal based on the selected test item, combined with automatic verification of auxiliary status signals, the correctness of the initial test state is ensured. Trigger signals are output according to the test logic, and the trigger start time T1 is automatically identified and recorded based on the signal type. Simultaneously, response signals are acquired to obtain the end time T2 and calculate the response time ΔT, achieving fully automated execution from triggering, acquisition, calculation to qualification judgment. Furthermore, signal recovery and re-verification, along with tamper-proof data storage with timestamps, ensure the safe recovery and full traceability of the test process. This invention effectively overcomes the shortcomings of existing technologies, such as low efficiency and poor standardization due to reliance on manual operation, significantly improving the measurement efficiency, result consistency, and reliability of high-temperature reactor protection system response time tests, and has good engineering application value.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system according to an embodiment of the present invention; Figure 2 This is an overall flowchart according to an embodiment of the present invention; Figure 3 This is a timing diagram for single-channel response time measurement according to an embodiment of the present invention. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0023] The following describes, with reference to the accompanying drawings, a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system according to an embodiment of the present invention.

[0024] The core idea of ​​this invention is to address the inefficiency and lack of standardization caused by manual operation in measuring the response time of high-temperature reactor protection systems. This is achieved by constructing an automated measurement method covering the entire process of "parameter loading—state verification—trigger identification—time calculation—qualification judgment—data archiving." First, measurement parameters are automatically loaded according to the selected test item, and a reference signal is forcibly output. This is combined with auxiliary state signals for automatic verification to ensure the initial state is correct. Second, the trigger start time T1 is automatically identified based on the signal type, and the response signal is simultaneously acquired to obtain the end time T2 and calculate ΔT. Then, ΔT is compared with the qualification criteria, the judgment result is output, the signal is restored, and verification is performed again. Finally, the test data is stored with a timestamp in an immutable format, achieving full traceability. Through this technical approach that integrates "automatic verification, precise capture, intelligent judgment, safe recovery, and reliable storage," this invention effectively overcomes the shortcomings of manual operation and significantly improves test efficiency, result consistency, and data reliability.

[0025] The following describes, with reference to the accompanying drawings, a fully automated measurement method for the logic decision duration of a high-temperature reactor protection system according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the fully automated measurement method for the logic decision duration of the high-temperature reactor protection system of the present invention includes the following steps: S1, based on the selected test items, automatically loads the corresponding measurement parameters and forces the output of the reference signal to the protected system under test and keeps it stable; during the stabilization period, it collects the auxiliary status signal for automatic verification. If the verification fails, the test is terminated and an alarm is triggered. If the verification passes, it continues to the next step. S2 outputs a step or ramp trigger signal to the protection system under test according to the test logic, and simultaneously acquires the input signal in real time at a preset acquisition frequency; automatically identifies and records the moment when the input signal reaches the trigger condition as the trigger start time T1 according to the signal type; S3, synchronously acquire the shutdown signal or dedicated action signal output by the protected system under test due to triggering, record the moment when the corresponding output signal changes as the response endpoint time T2, and calculate the response time ΔT = T2 - T1; S4. Compare the calculated ΔT with the preset upper limit of the pass / fail criterion, and output the result of whether the test is pass or fail; then restore the output signal to the preset safety recovery value, and re-verify that the shutdown signal and action signal have disappeared; otherwise, issue an alarm. S5 automatically records the test time, test personnel, channel identifier, trigger threshold, T1, T2, ΔT, judgment result and operation log generated during the test. It attaches timestamps to these data and stores them in an immutable format for full traceability of the test.

[0027] In general, the measurement system used in this embodiment includes a measurement control unit, a data acquisition unit, a signal output unit, and a tamper-proof storage unit. The data acquisition frequency is set to 1ms by default, and the upper limit of the pass / fail criterion, the signal change rate threshold, and the safety recovery value are automatically retrieved from the pre-configured test procedure database according to the selected test items. The specific implementation steps include: Step 1: Parameter loading, reference signal output, and pre-verification.

[0028] First, the operator selects the "High Source Range Nuclear Power Emergency Shutdown" test item on the measurement and control unit. The system automatically loads the corresponding measurement parameters based on the selected item: acquiring the user-selected test channel identifier, signal type, trigger threshold, signal change rate threshold, signal recovery value, data acquisition frequency, and upper limit of the pass / fail criterion. These parameters are then loaded into the measurement and control unit, which configures the trigger identification logic based on the signal type and trigger threshold, sets the sampling clock according to the data acquisition frequency, and returns a status indicator indicating configuration completion.

[0029] Subsequently, the measurement and control unit forces a reference signal to the protection system under test through the signal output channel, and continuously outputs a value no less than the preset threshold. During this period, the shutdown signal and action signal fed back by the protection system under test are continuously acquired at a data acquisition frequency of 1ms. If any non-zero or abnormal state signal is detected, the system is judged to have failed to stabilize and an alarm is issued, and the test is terminated; otherwise, a successful stabilization indicator is generated.

[0030] During the stabilization period, auxiliary status signals, including the B6 signal, P10 signal, and reactor shutdown signal, are simultaneously acquired from the protection system under test. The current status of each signal is compared one by one with the preset test start condition, which is that all auxiliary status signals are in a no-signal state. If all match, the test can proceed to the next step; otherwise, the test is terminated and a verification failure alarm is output.

[0031] Step 2: Trigger signal output and capture of trigger start time T1.

[0032] According to the test logic, the measurement and control unit outputs a trigger signal to the protected system under test. This embodiment uses a step output method, stepping the signal from a reference value to the trigger threshold. Simultaneously, the input signal is acquired in real-time at a sampling frequency of 1ms. Based on the signal type, the acquired analog signal value is obtained in real-time and compared with the preset trigger threshold. The sampling moment when the signal value changes from less than the threshold to greater than or equal to the threshold is recorded as the trigger start time T1 and saved to the storage unit. If a switch quantity or rate of change over-limit trigger is used, the corresponding logic is followed for identification.

[0033] Step 3: Capturing the response endpoint time T2 and calculating the response time.

[0034] The shutdown signal output by the protected system under test (PST) upon triggering is synchronously acquired. The logic level of the shutdown signal output by the PST is obtained and sampled synchronously at the same data acquisition frequency as the input signal. The rising edge of the output signal is detected, and the sampling time at which the first state change of the output signal occurs is recorded as the response endpoint time T2. Then, the response time ΔT = T2 - T1 is calculated.

[0035] Step 4: Qualification determination, signal recovery, and re-verification.

[0036] The calculated ΔT is compared with the preset upper limit of the pass / fail criterion, and the result of the test pass or fail is output. Subsequently, the measurement and control unit adjusts the output signal value from the threshold state after triggering to the preset safety recovery value through the signal output channel. After the output is restored, the shutdown signal and action signal of the protected system under test are reacquired, and the acquired signal value is compared with the zero or no action state value: if all signals indicate no shutdown and no action, the state is confirmed to have returned to normal; otherwise, the alarm signal continues to be issued.

[0037] Step 5: Dual-channel test.

[0038] This embodiment involves A / B dual-channel measurement. After recording and verifying the trigger start time T1 and response end time T2 of the first channel, the output signal of the first channel is kept at a safe recovery value, and the process is switched to the second channel. All sub-steps described above—reference signal output, pre-state verification, trigger signal output, start and end time capture, response time calculation, pass / fail determination, and signal recovery verification—are repeated for the second channel until all selected channels have completed measurement. Finally, the measurement result datasets for each channel are summarized and output.

[0039] Step Six: Data Recording and Archiving.

[0040] The system automatically records the test time, test personnel, channel identifiers, trigger thresholds, T1, T2, ΔT, judgment results, and operation logs generated during the test. This data is organized into structured data records, with each record appended with a timestamp and digital checksum, and written to append-only storage media, prohibiting modification or deletion of the written data. Simultaneously, test curve images are generated based on T1 and T2, with time on the horizontal axis and signal amplitude on the vertical axis, and the trigger start and response end points are marked on the curve images. The data stored in this manner is used for full-process test traceability.

[0041] That is to say: (1) Measurement process Based on the selected test item, the system automatically loads the corresponding channel, signal type, trigger threshold, rate of change, recovery value, acquisition frequency (default 1ms), pass / fail criteria, and other parameters to complete the test system initialization.

[0042] Rate of change:

[0043] S1, S2: Analog signal values ​​acquired in two consecutive acquisitions; t1, t2: Analog signal values ​​acquired in two consecutive data acquisitions; : Signal change rate, used as a criterion for triggering a trigger when the change rate exceeds the limit.

[0044] (2) Signal presetting and stabilization waiting.

[0045] The reference signal is forcibly output according to the test procedure to put the system into the test preparation state, and the signal is kept stable for no less than 3 seconds to ensure that there are no shutdown signals or abnormal action signals in the initial state.

[0046] (3) Automatic verification of the previous state.

[0047] The system automatically detects auxiliary status signals to confirm that the test start conditions are met; if any condition is not met, an alarm is immediately triggered and the test is terminated to avoid erroneous tests.

[0048] (4) Signal triggering and precise timing capture.

[0049] Execute a step or ramp output according to the experimental logic until the signal reaches the trigger threshold; automatically capture and record the trigger start time T1: Analog quantity: The moment when the signal reaches the threshold; Switch quantity: The rising edge of the button being pressed and the contact being closed; Rate of change: The moment when the signal reaches the set rate of change.

[0050] (5) System response acquisition and time calculation.

[0051] The system synchronously acquires the shutdown signal and dedicated action signal output by the protection system under test, and captures the response endpoint time T2; it automatically calculates the response time: ΔT = T2. T1.

[0052] (6) System response acquisition and time calculation.

[0053] Conduct a qualification assessment: ΔT=T2 T1; ΔT≤ΔTlimit; ΔTlimit: The upper limit of the allowed response time specified in the procedure.

[0054] (6) Signal recovery and status verification.

[0055] Automatically or manually restore the output signal to the reference safety value, verify that the shutdown signal and action signal have reliably disappeared, ensure that the system returns to normal, and avoid affecting subsequent tests.

[0056] (7) Data recording and test archiving.

[0057] It automatically records test time, testers, channel number, trigger threshold, response time, status verification results, and operation logs; the data is stored with timestamps, cannot be arbitrarily tampered with, and supports full traceability of the test.

[0058] The method of this invention effectively solves the problems of low automation, susceptibility to human interference, and difficulty in process traceability in the prior art. It realizes integrated measurement of the entire process from parameter loading, automatic verification, accurate timing to tamper-proof storage, significantly improves the accuracy and reliability of response time testing, and enhances its engineering practical value under complex working conditions.

[0059] In addition, this embodiment of the invention also proposes an application scenario, such as Figure 2 As shown, the measurement of emergency shutdown response time at high source-range nuclear power is taken as an example: 1. Initialization.

[0060] Select the test item, configure A / B dual channels, signal type is source range core power, and the acquisition frequency is set to 1ms; set the preset value to 2kW, the trigger threshold to 12kW, and the recovery value to 0.025W.

[0061] 2. Signal preset.

[0062] Force the A / B channels to output 2kW and maintain stability for 3 seconds to ensure no signal fluctuations and no system abnormalities.

[0063] 3. Pre-state verification.

[0064] The status of B6, P10, and shutdown signals is automatically collected, and it is confirmed that all signals are "no signal", thus meeting the test start-up conditions.

[0065] 4. Trigger test (Channel A).

[0066] like Figure 3 As shown, the signal in channel A is stepped up from 2kW to 12kW. The system captures the moment when the signal reaches the trigger threshold and records it as T1. Simultaneously, the reactor shutdown signal is acquired, and the rising edge of the signal is captured and recorded as T2. The response time ΔT = T2 is calculated. T1.

[0067] 5. Restore verification.

[0068] The A channel signal was restored to 0.025W. After the signal stabilized, the shutdown signal was checked to confirm that the system was in normal condition.

[0069] 6. B-channel test.

[0070] Keep the state of channel A unchanged, and repeat steps 2 to 5 to complete the test of channel B.

[0071] 7. Data recording.

[0072] Automatically save test time, test personnel, channel information, trigger threshold, T1, T2, ΔT, status results, operation log, and generate test curves.

[0073] 8. The experiment is over.

[0074] Output the test results, determine whether the test is qualified, and complete the entire test process.

[0075] This invention uses the measurement of emergency shutdown response time at high nuclear power in the source range as an application scenario. It automatically loads dual-channel parameters and sets preset values, trigger thresholds, and recovery values; it forces the output reference signal to remain stable, automatically verifying auxiliary status signals to ensure startup conditions are met; subsequently, it executes a step trigger, accurately capturing the trigger start time T1 and the response end time T2, calculating the response time ΔT; after completing the single-channel test, it automatically recovers and verifies the signal, then switches to another channel to repeat the test. Finally, it saves data such as test time, channel information, ΔT, and operation logs, and generates a curve. This embodiment verifies that the invention can achieve fully automated testing, independent dual-channel measurement, and status verification, effectively avoiding human error and signal residual interference, and significantly improving the efficiency and reliability of response time measurement.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A fully automated measurement method for the logic decision duration of a high-temperature reactor protection system, characterized in that, include: Based on the selected test items, the corresponding measurement parameters are automatically loaded, and a reference signal is forcibly output to the protection system under test and kept stable. During the stabilization period, auxiliary status signals are collected for automatic verification. If the verification fails, the test is terminated and an alarm is triggered. If the verification passes, the next step is executed. According to the test logic, a step or ramp trigger signal is output to the protection system under test, and the input signal is acquired in real time at a preset acquisition frequency; the moment when the input signal reaches the trigger condition is automatically identified and recorded as the trigger start time T1 according to the signal type. Synchronously acquire the shutdown signal or dedicated action signal output by the protection system under test due to triggering, record the moment when the corresponding output signal changes as the response endpoint time T2, and calculate the response time ΔT = T2 - T1; The calculated ΔT is compared with the preset upper limit of the pass / fail criterion, and the result of the test pass or fail is output. Then restore the output signal to the preset safe recovery value, and re-verify that the shutdown signal and action signal have disappeared; otherwise, issue an alarm. The system automatically records the test time, test personnel, channel identifier, trigger threshold, T1, T2, ΔT, judgment results, and operation logs generated during the test. These data are timestamped and stored in an immutable format for full traceability of the test.

2. The method as described in claim 1, characterized in that, Automatically load the corresponding measurement parameters, including: The system acquires the user-selected test channel identifier, signal type, trigger threshold, signal change rate threshold, signal recovery value, data acquisition frequency, and upper limit value of the pass / fail criterion, and loads these parameters into the measurement control unit. The measurement and control unit configures the trigger identification logic based on the signal type and the trigger threshold, sets the sampling clock according to the data acquisition frequency, and finally returns a status indicator indicating that the configuration is complete.

3. The method as described in claim 1, characterized in that, Force a reference signal to be output to the protection system under test and keep it stable, including: The measurement and control unit outputs a preset reference signal value through the signal output channel and continuously outputs a value no less than the preset threshold. During this period, the shutdown signal and action signal fed back by the protection system under test are continuously acquired at the data acquisition frequency. If any non-zero or abnormal state signal is detected, the stability is determined to have failed and an alarm is issued. Otherwise, a stability success indicator is generated.

4. The method as described in claim 1, characterized in that, Automatic verification is performed by collecting auxiliary status signals, including: Auxiliary status signals are obtained from the protection system under test. The auxiliary status signals include B6 signal, P10 signal and reactor shutdown signal. The current state of each signal is compared with the preset test start condition one by one. The test start condition is that all auxiliary state signals are in a no-signal state. If all match, the next step is allowed to continue. Otherwise, the test is terminated and a verification failure alarm is output.

5. The method as described in claim 1, characterized in that, The system automatically identifies and records the moment when the input signal reaches the trigger condition, based on the signal type, as the trigger start time T1, including: Real-time acquisition of analog signal values ​​or switch signal level status; If the signal type is analog, compare the real-time signal value with the preset trigger threshold. When the signal value changes from less than the threshold to greater than or equal to the threshold, record the corresponding time as T1. If the signal type is digital, detect the rising edge of the signal and record the time when the level changes from low to high as T1. If the signal type is rate of change exceeding the limit, continuously calculate the rate of change of the signal between two adjacent samples. Record the time when the rate of change first reaches or exceeds the preset rate of change threshold as T1. Save T1 to the storage unit.

6. The method as described in claim 1, characterized in that, Synchronously acquire the shutdown signal or dedicated action signal output by the protected system under test due to triggering, including: Acquire the logic level of the shutdown signal or dedicated action signal output by the protection system under test, and sample synchronously at the same data acquisition frequency as the input signal; The rising or falling edge of the corresponding output signal is detected, and the sampling time at which the output signal first changes state is recorded as the response endpoint time T2.

7. The method according to claim 1, characterized in that, The output signal is restored to the preset safe recovery value, and the shutdown signal and action signal are verified again to confirm that they have disappeared, including: The measurement and control unit adjusts the output signal value from the threshold state or the rate of change exceeding the limit state after triggering to the preset safe recovery value through the signal output channel; after the output is restored, the shutdown signal and action signal of the protected system under test are reacquired, and the acquired signal value is compared with the zero or no action state value; if all signals indicate no shutdown and no action, the state is confirmed to have returned to normal; otherwise, an alarm signal is continuously issued.

8. The method as described in claim 1, characterized in that, Also includes: After completing the recording and signal recovery verification of the trigger start time T1 and response end time T2 of the first channel, keep the output signal of the first channel unchanged at the safe recovery value, and switch to the second channel; Repeat all sub-steps of the second channel, including reference signal output, pre-state verification, trigger signal output, start and end time capture, response time calculation, qualification judgment and signal recovery verification, until all selected channels have completed the measurement; finally, summarize and output the measurement result dataset of each channel.

9. The method according to claim 1, characterized in that, Automatically record the test time, test personnel, channel identifier, trigger threshold, T1, T2, ΔT, judgment result, and operation log generated during the test. Store this data with timestamps in an immutable format, including: The test time, test personnel, channel identification, trigger threshold, T1, T2, ΔT, judgment results, and operation logs are organized into structured data records; Each record is appended with a timestamp and a digital checksum and written to an append-only storage medium, prohibiting modification or deletion of the written data; Simultaneously, test curve images are generated based on T1 and T2. The curve images are plotted with time on the horizontal axis and signal amplitude on the vertical axis, and the positions of the trigger start point and response end point are marked on the curve images.

10. The method according to claim 1, characterized in that, The default data acquisition frequency is 1ms, and the upper limit of the pass / fail criteria, the threshold of the signal change rate, and the safety recovery value are all automatically retrieved from the pre-configured test procedure database according to the selected test items.

Images