Method and system for online testing and analyzing system fault through response time

Abstract

The invention discloses a method and system for analyzing system faults through response time on-line testing, and the method comprises the steps: calculating a first probability distribution function and a maximum value of theoretical response time through a theoretical value based on the system response time; real response time of the system is measured in real time by adopting an online response time testing method; determining whether the real response time meets a first probability distribution function or not through a x2 fitting test method; when the real response time does not meet the first probability distribution function, changing the size of each component of the system response time during theoretical value calculation to obtain a second probability distribution function different from the first probability distribution function; and determining whether the real response time satisfies the second probability distribution function through the x2 fitting test method, and if so, reversely deducing a response time error link. According to the method, whether the system breaks down or not is judged through online test analysis of the response time.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plants and online testing, and in particular to a method and a system for analyzing system failures through online testing of response time. Background Art

[0002] The existing testing method for the reactor protection device of a nuclear power plant is to use an offline method. Each test needs to be carried out during the shutdown period and the external cables need to be disassembled. After the test is completed, reinstallation verification and other work are required, which is time-consuming and laborious and cannot be fully automated.

[0003] However, existing nuclear power plant reactor protection devices do not have an online testing method for response time, and are unable to promptly detect time performance defects in the system.

[0004] In view of this, this application is hereby filed. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for analyzing system failures through online testing of response time. The present invention is based on online testing of response time, and response time data is obtained in real time. The actual response time probability distribution curve can be calculated through analysis, and compared with the probability distribution curve calculated by theoretical analysis, it can be found whether the various components of the response time are working normally, and the possible abnormalities can be deduced through the deviation range.

[0006] The present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a method for analyzing system failures through online response time testing, the method comprising:

[0008] Step A: Based on the system response time, the maximum value of the first probability distribution function and the theoretical response time is calculated by a theoretical method;

[0009] Step B: Use the online test method of response time to measure the real response time of the system in real time;

[0010] Step C: Through χ 2 Fitting test method, confirming whether the actual response time satisfies the first probability distribution function;

[0011] Step D: When the actual response time does not satisfy the first probability distribution function, the size of each component of the system response time is changed during the theoretical calculation, thereby obtaining a second probability distribution function different from the first probability distribution function; and again by χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the error link of the actual response time is deduced.

[0012] Furthermore, the method further comprises:

[0013] When the actual response time satisfies the first probability distribution function, there is no link where the actual response time is wrong.

[0014] Furthermore, the system response time refers to the response time of the reactor protection device of the nuclear power plant.

[0015] Furthermore, the system response time includes signal acquisition time T1, constant value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, and the system response time is equal to the sum of signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time.

[0016] Further, step B comprises:

[0017] At the signal acquisition end, when the start signal is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is 1, 2, 3...;

[0018] The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link. The response time online test device marks the start data with a time mark, which is recorded as Tstart;

[0019] After the customized comparison link is processed, the starting data with natural number sequence number is sent to the communication link, logic processing link and signal output link in sequence;

[0020] When the end signal is collected, the end signal and the natural number sequence number added thereto are sent as the end data to the response time online test device and the action is output; at the same time, the response time online test device marks the end data with a time mark, which is recorded as T end;

[0021] Through the sequence number of the end signal, find out its corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement;

[0022] According to the above method, multiple real response times x are obtained. n , n=1,2,3…。

[0023] Further, step D comprises:

[0024] Step D1: When the actual response time does not satisfy the first probability distribution function F 理论 (t), then on the basis of other unchanged, only the theoretical value T1 is changed. 1理论 , from 0-T 理论max , the single step length is determined by T 理论max OK, T理论max is the maximum value of the theoretical response time; each step is repeated once, and step A is repeated to obtain the second probability distribution function F' of the response time through the theoretical value calculation. 理论 (t) and the maximum value of the response time T' 理论max ;

[0025] Step D2, determine the maximum value T' of the response time 理论max and the actual response time x1, x2, x3…x n The maximum value size in ;

[0026] Step D3, if the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2;

[0027] Step D4, if the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C;

[0028] Step D5: When the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link is faulty;

[0029] Step D6: When the actual response time does not satisfy the second probability distribution function F' 理论 (t), then change the theoretical value of T2 T on the basis of other unchanged 2理论 , the same method from step D1 to step D5 is used for positioning until all theoretical values ​​T are traversed 1理论 ~T 5理论 .

[0030] Furthermore, step D also includes:

[0031] Step D7, if all theoretical values ​​T are traversed 1理论 ~T 5理论 If the fault link is not located, then all theoretical values ​​T are traversed by combining the signal acquisition time T1, the fixed value comparison time T2, the data exchange time T3, the logic processing time T4 and the signal output time T5 using the method of steps D1 to D6. 1理论 ~T 5理论 All combinations of are used for positioning.

[0032] In a second aspect, the present invention further provides a system for analyzing system failures through online response time testing, the system using the above-mentioned method for analyzing system failures through online response time testing; the system comprises:

[0033] A theoretical calculation unit, used to calculate the maximum value of the first probability distribution function and the theoretical response time through theoretical values ​​based on the system response time;

[0034] The online measurement unit is used to adopt the online test method of response time to measure the real response time of the system in real time;

[0035] Fit test unit, used to pass χ 2 Fitting test method, confirming whether the actual response time satisfies the first probability distribution function;

[0036] The fault location unit is used to change the size of each component of the system response time when calculating the theoretical value when the actual response time does not satisfy the first probability distribution function, so as to obtain a second probability distribution function different from the first probability distribution function; and again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the actual response time is erroneous is deduced; when the actual response time satisfies the first probability distribution function, there is no link where the actual response time is erroneous.

[0037] Furthermore, the system response time refers to the response time of the nuclear power plant reactor protection device;

[0038] The system response time includes signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time, and the system response time is equal to the sum of signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time.

[0039] Furthermore, the execution process of the online measurement unit is:

[0040] At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is a positive integer;

[0041] The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device marks the start data with a time mark, which is recorded as Tstart;

[0042] After the customized comparison link is processed, the starting data with natural number sequence number is sent to the communication link, logic processing link and signal output link in sequence;

[0043] When the end signal is collected, the end signal together with the natural number sequence number added thereto is sent as the end data to the response time online test device and an action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end;

[0044] Through the sequence number of the end signal, find out its corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement;

[0045] According to the above process, multiple real response times x are obtained. n , n is a positive integer.

[0046] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method of analyzing system failures through online response time testing when executing the computer program.

[0047] In a fourth aspect, the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method for analyzing system failures through online response time testing is implemented.

[0048] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0049] The present invention provides a method and system for analyzing system failures through online response time testing. The present invention determines whether a system fails through online response time testing and analysis. (1) Through online response time testing, while the device is working, by comparing the measured response time data with the theoretical calculation data, it can be found whether there is an abnormality in each response time component of the device; (2) The present invention determines whether a system fails through online response time testing and analysis. 2 Fitting test method is used to assist fault location. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0051] Figure 1 A flow chart of a method for analyzing system failures through online response time testing of the present invention;

[0052] Figure 2 It is a schematic diagram of the composition of the response time of the system of the present invention;

[0053] Figure 3 It is a schematic diagram of an online test method for response time of a reactor protection device of a nuclear power plant according to the present invention;

[0054] Figure 4 The present invention is a system structure block diagram for analyzing system failures through online response time testing. DETAILED DESCRIPTION

[0055] The terms used in various embodiments of the present invention are only used for the purpose of describing specific embodiments and are not intended to limit various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meaning generally understood by those of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in various embodiments of the present invention.

[0056] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0057] The existing nuclear power plant reactor protection devices do not have an online test method for response time, and cannot timely discover the time performance defects of the system. The present invention designs a method and system for analyzing system failures through online response time testing. First, the response time distribution function F(t) of the system is obtained through theoretical calculation, and then the real response time of the system can be measured in real time through the online test method of response time. When the real response time data is large enough, it can be detected through χ 2 The fitting test method confirms whether the measured value satisfies the F(t) distribution. When it does not satisfy the F(t) distribution, in the theoretical calculation, the size of each component of the system response time is changed to obtain different F'(t), and the χ 2 The fitting test method confirms whether the measured value satisfies the F'(t) distribution. If so, the link where the response time is wrong can be deduced.

[0058] Example 1

[0059] like Figure 1 As shown, the present invention provides a method for analyzing system failures through online response time testing, the method comprising:

[0060] Step A: Based on the system response time, the first probability distribution function F is calculated by theoretical method 理论 (t) and the maximum value of the theoretical response time;

[0061] Step B: Use the online test method of response time to measure the real response time of the system in real time;

[0062] Step C: When the data of real measured response time is large enough, 2Fitting test method, confirm whether the actual response time satisfies the first probability distribution function F 理论 (t);

[0063] Step D: When the actual response time does not satisfy the first probability distribution function F 理论 (t), then in the theoretical calculation, the size of each component of the system response time is changed to obtain the first probability distribution function F 理论 (t) Different second probability distribution function F' 理论 (t); again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function F' 理论 (t), if it satisfies the condition, then the link where the actual response time is wrong can be deduced;

[0064] When the actual response time satisfies the first probability distribution function F 理论 (t), there is no link where the actual response time is wrong.

[0065] In this embodiment, the system response time refers to the response time of the nuclear power plant reactor protection device. The system response time includes signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time, and the system response time is equal to the sum of signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time.

[0066] Specifically, the system response time T=T1+T2+T3+T4+T5, where: T1 is the signal acquisition time, T2 is the fixed value comparison time, T3 is the data exchange time, T4 is the logic processing time, and T5 is the signal output time.

[0067] The specific implementation is as follows:

[0068] Step A: Based on the system response time, through T 1理论 、T 2理论 、T 3理论 、T 4理论 and T 5理论 The probability distribution function of the response time (i.e., the first probability distribution function F 理论 (t)) and the maximum value of the response time T 理论max .

[0069] Step B: Use the online test method of response time to measure the real response time of the system in real time. Figure 2 It can be analyzed that the essence of system response time is a process of signal A flowing to signal B, such as Figure 3 shown.

[0070] Specifically, step B includes:

[0071] Step B1, at the signal acquisition end, after the start signal (signal A) is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is 1, 2, 3...;

[0072] Step B2, sending the start signal (A signal) together with the natural number sequence number added thereto as the start data to the response time online test device and the fixed value comparison link, and the response time online test device marks the start data with a time mark, which is recorded as Tstart;

[0073] Step B3, after the customized comparison link is processed, the starting data with the natural number sequence is sent to the next link in sequence, and this step is repeated, passing through the communication link and the logic processing link, until the data reaches the last signal output link.

[0074] Step B4, after the end signal (B signal) is collected, the end signal together with the natural number sequence number added thereto is sent to the response time online test device as the end data and an action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end;

[0075] Step B5, find out the corresponding start signal (A signal) time mark Tstart through the sequence number of the end signal (B signal); Tend-Tstart is the actual response time x1 obtained by a measurement;

[0076] Step B6: According to the above method, multiple real response times x1, x2, x3...x n , n=1,2,3…。

[0077] from Figure 3 It can be seen that A and A', B and B' are not consistent, that is, Tend-Tstart is not the real signal response time. In order to ensure engineering application, it is necessary to ensure that the operation cycle of signal acquisition and signal output is fast enough, at least one order of magnitude higher than the real response time of BA. If BA is in the second level, the operation cycle of signal acquisition and signal output should be in the millisecond level. Only in this way can the engineering application effect be guaranteed.

[0078] Step C: Through χ 2 The fitting test method tests whether the measured value satisfies F 理论 (t).

[0079] If satisfied, repeat step B6 to update the measured value of response time, and then repeat step C again to perform the next round of inspection.

[0080] Step D: Step D includes:

[0081] Step D1: When the actual response time does not satisfy the first probability distribution function F 理论(t), then on the basis of other unchanged, only the theoretical value T1 is changed. 1理论 , from 0-T 理论max , the single step length is determined by T 理论max OK, T 理论max is the maximum value of the theoretical response time; if T 理论max If the response time is in the second level, the step can be made in millisecond level. Repeat step A for each step, and calculate the second probability distribution function F' of the response time through the theoretical value. 理论 (t) and the maximum value of the response time T' 理论max ;

[0082] Step D2, determine the maximum value T' of the response time 理论max and the actual response time x1, x2, x3…x n The maximum value size in ;

[0083] Step D3, if the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2;

[0084] Step D4, if the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C;

[0085] Step D5: When the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link is faulty;

[0086] Step D6: When the actual response time does not satisfy the second probability distribution function F' 理论 (t), then change the theoretical value of T2 T on the basis of other unchanged 2理论 , the same method from step D1 to step D5 is used for positioning until all theoretical values ​​T are traversed 1理论 ~T 5理论 ;

[0087] Step D7, if all theoretical values ​​T are traversed 1理论 ~T 5理论 If the fault link is not located, then all theoretical values ​​T are traversed by combining the signal acquisition time T1, the fixed value comparison time T2, the data exchange time T3, the logic processing time T4 and the signal output time T5 using the method of steps D1 to D6. 1理论 ~T 5理论 All combinations of are used for positioning.

[0088] The present invention determines whether the system is faulty by online testing and analysis of the response time. (1) Through online testing of the response time, while the device is working, by comparing the measured response time data with the theoretical calculation data, it can be found whether there is an abnormality in each component of the device's response time. (2) The present invention determines whether the system is faulty by online testing and analysis of the response time. 2 Fitting test method is used to assist fault location.

[0089] Example 2

[0090] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that this embodiment further provides a system for analyzing system failures through online response time testing, and the system uses a method for analyzing system failures through online response time testing in embodiment 1; the system corresponds one-to-one to the method for analyzing system failures through online response time testing in embodiment 1; the system includes:

[0091] Theoretical calculation unit, used to calculate the first probability distribution function F based on the system response time through the theoretical value 理论 (t) and the maximum value of the theoretical response time;

[0092] The online measurement unit is used to adopt the online test method of response time to measure the real response time of the system in real time;

[0093] Fit test unit, used to pass χ 2 Fitting test method, confirm whether the actual response time satisfies the first probability distribution function F 理论 (t);

[0094] The fault location unit is used to locate the fault when the actual response time does not satisfy the first probability distribution function F 理论 (t), then when calculating the theoretical value, the size of each component of the system response time is changed to obtain the first probability distribution function F 理论 (t) Different second probability distribution function F' 理论 (t); again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function F' 理论 (t), if it satisfies, then the link where the real response time is wrong can be deduced; when the real response time satisfies the first probability distribution function F 理论 (t), there is no link where the actual response time is wrong.

[0095] As a further implementation, the system response time refers to the response time of the nuclear power plant reactor protection device;

[0096] The system response time includes signal acquisition time T1, constant value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, and the system response time is equal to the sum of signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time.

[0097] As a further implementation, the execution process of the online measurement unit is:

[0098] At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is a positive integer;

[0099] The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device marks the start data with a time mark, which is recorded as Tstart;

[0100] After the customized comparison link is processed, the starting data with natural number sequence number is sent to the communication link, logic processing link and signal output link in sequence;

[0101] When the end signal is collected, the end signal together with the natural number sequence number added thereto is sent as the end data to the response time online test device and an action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end;

[0102] Through the sequence number of the end signal, find out its corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement;

[0103] According to the above process, multiple real response times x are obtained. n , n is a positive integer.

[0104] The execution process of each unit can be performed according to the process steps of a method for analyzing system failures through online response time testing in Example 1, which will not be described in detail in this embodiment.

[0105] At the same time, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned method of analyzing system failures through online response time testing is implemented.

[0106] At the same time, the present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method for analyzing system failures through online response time testing is implemented.

[0107] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0108] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0111] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for analyzing system failures through online response time testing, characterized in that: The method includes: Step A: Based on the system response time, the maximum value of the first probability distribution function and the theoretical response time is calculated through theoretical values; Step B: Use the online test method of response time to measure the real response time of the system in real time; Step C: Through χ 2 A fitting test method is used to confirm whether the actual response time satisfies a first probability distribution function; Step D: When the actual response time does not satisfy the first probability distribution function, the size of each component of the system response time is changed during the theoretical value calculation to obtain a second probability distribution function different from the first probability distribution function; and again by χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the response time is wrong is deduced.

2. A method for analyzing system failures through online response time testing according to claim 1, characterized in that: The method further includes: When the actual response time satisfies the first probability distribution function, there is no link where the response time is wrong.

3. The method for analyzing system failures through online response time testing according to claim 1, characterized in that: The system response time refers to the response time of the reactor protection device of the nuclear power plant.

4. The method for analyzing system failures through online response time testing according to claim 3, characterized in that: The system response time includes signal acquisition time T1, fixed value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, and the system response time is equal to the sum of signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time.

5. The method for analyzing system failures through online response time testing according to claim 1, characterized in that: Step B includes: At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is a positive integer; The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device marks the start data with a time mark, which is recorded as Tstart; After the customized comparison link is processed, the starting data with natural number sequence is sent to the communication link, logic processing link and signal output link in sequence; When the end signal is collected, the end signal together with the natural number sequence number added thereto is sent as the end data to the response time online test device and an action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end; Through the sequence number of the end signal, find out its corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement; According to the above method, multiple real response times x are obtained. n , n is a positive integer.

6. A method for analyzing system failures through online response time testing according to claim 5, characterized in that: Step D includes: Step D1: when the actual response time does not satisfy the first probability distribution function F 理论 (t), only the theoretical value of T1 is changed first, from 0-T 理论max , the single step length is determined by T 理论max OK, T 理论max is the maximum value of the theoretical response time; each step is repeated once, and step A is repeated to obtain the second probability distribution function F' of the response time through the theoretical value calculation. 理论 (t) and the maximum value of the response time T' 理论max ; Step D2, determine the maximum value T' of the response time 理论max and the actual response time x1, x2, x3…x n The maximum value size in ; Step D3, if the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2; Step D4, if the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C; Step D5, when the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link is faulty; Step D6: when the actual response time does not satisfy the second probability distribution function F' 理论 (t), then the theoretical value of T2 is changed, and the positioning is performed in the same manner using the methods of steps D1 to D5 until all theoretical values ​​T1 to T5 are traversed.

7. The method for analyzing system failures through online response time testing according to claim 6, characterized in that: Step D also includes: Step D7, if the fault link is not located after traversing all theoretical values, then through the combination of signal acquisition time T1, fixed value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, the method of steps D1 to D6 is used to traverse all combinations of all theoretical values ​​and locate the fault link.

8. A system for analyzing system failures through online response time testing, characterized in that: The system includes: A theoretical calculation unit, used to calculate the maximum value of the first probability distribution function and the theoretical response time through theoretical values ​​based on the system response time; The online measurement unit is used to adopt the online test method of response time to measure the real response time of the system in real time; Fit test unit, used to pass χ 2 A fitting test method is used to confirm whether the actual response time satisfies a first probability distribution function; a fault location unit, configured to change the size of each component of the system response time when calculating the theoretical value when the actual response time does not satisfy the first probability distribution function, so as to obtain a second probability distribution function different from the first probability distribution function; and again by using χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the response time is erroneous is deduced; when the actual response time satisfies the first probability distribution function, there is no link where the response time is erroneous.

9. The system for analyzing system failures through online response time testing according to claim 8, characterized in that: The system response time refers to the response time of the nuclear power plant reactor protection device; The system response time includes signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time, and the system response time is equal to the sum of signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time.

10. The system for analyzing system failures through online response time testing according to claim 8, characterized in that: The execution process of the online measurement unit is as follows: At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, and the value of the natural number sequence is a positive integer; The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device marks the start data with a time mark, which is recorded as Tstart; After the customized comparison link is processed, the starting data with natural number sequence is sent to the communication link, logic processing link and signal output link in sequence; When the end signal is collected, the end signal together with the natural number sequence number added thereto is sent as the end data to the response time online test device and an action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end; Through the sequence number of the end signal, find out its corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement; According to the above process, multiple real response times x are obtained. n , n is a positive integer.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for analyzing system failures through online response time testing as described in any one of claims 1 to 7 is implemented.

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for analyzing system failures through online response time testing as described in any one of claims 1 to 7 is implemented.

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