Periodic test device for earthquake monitoring instrument of nuclear power plant

Abstract

The utility model provides a periodic test device for an earthquake monitoring instrument of a nuclear power plant, which relates to the technical field of earthquake monitoring instrument tests and can perform online detection on the earthquake monitoring instrument of the nuclear power plant to form a closed-loop test without dismounting the earthquake monitoring instrument. Periodic test operation steps of instrument control maintenance personnel are reduced, test operation and monitoring can be realized through the man-machine interaction terminal, the operation load is greatly simplified, the display result is more visual and objective, the test result can be transmitted to a rear-end control room in real time for on-line checking, and the test scheme is convenient to expand and high in practicability. And the test operation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of earthquake monitoring instrument testing, and more specifically to a periodic testing device for earthquake monitoring instruments of nuclear power plants. Background Art

[0002] The seismic monitoring instruments placed in the reactor building of a nuclear power plant are used to collect seismic signals and transmit the collected seismic signals to the seismic shutdown system to determine whether to shut down the reactor. The accuracy of the signals collected by the seismic monitoring instrument is directly related to whether the reactor can receive accurate seismic signals for threshold judgment. Therefore, seismic monitoring instruments with a functional level of safety level need to be tested regularly. In other words, nuclear-grade seismic monitoring instruments in nuclear power plants need to be regularly maintained, such as channel inspections, amplitude-frequency response tests, etc., to ensure that the seismic monitoring instruments can normally collect seismic signals in nuclear power plants.

[0003] At present, there are few nuclear power plants in the industry that use nuclear-grade earthquake monitoring instruments. Most of the special equipment used to maintain and detect nuclear-grade earthquake monitoring instruments are non-safety-grade and have an open-loop structure. The functions of the test equipment are relatively simple, and the human-computer interaction is not friendly enough.

[0004] Therefore, how to provide a new type of periodic test device for earthquake monitoring instruments in nuclear power plants is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, in order to solve the above problems, the utility model provides a periodic test device for earthquake monitoring instruments in nuclear power plants, and the technical solution is as follows:

[0006] A periodic test device for earthquake monitoring instruments in a nuclear power plant, wherein a plurality of earthquake monitoring instruments are arranged at different locations in the nuclear power plant, and the periodic test device for earthquake monitoring instruments in a nuclear power plant comprises: a human-computer interaction terminal, a CPU board and a communication interface;

[0007] The human-computer interaction terminal and the communication interface are respectively connected to the CPU board for communication, and the communication interface is connected to at least one of the earthquake monitoring instruments for communication;

[0008] The human-computer interaction terminal is used to receive a first interaction instruction and transmit the first interaction instruction to the CPU board;

[0009] The CPU board is used to periodically generate a test signal according to the first interactive instruction, and transmit the test signal to the seismic monitoring instrument with a corresponding communication connection through the communication interface; collect a feedback signal generated by the seismic monitoring instrument according to the test signal, and analyze and process the test signal and the feedback signal to generate a test result of the seismic monitoring instrument;

[0010] The human-computer interaction terminal is also used to display the test results.

[0011] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments of nuclear power plants, the periodic test device for earthquake monitoring instruments of nuclear power plants further comprises:

[0012] A network communication board, the human-computer interaction terminal is communicatively connected with the CPU board via the network communication board.

[0013] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments in nuclear power plants, the communication interface comprises: an AO board and an AI board;

[0014] The CPU board transmits the test signal to the earthquake monitoring instrument corresponding to the communication connection through the AO board;

[0015] The CPU board collects the feedback signal generated by the seismic monitoring instrument according to the test signal through the AI ​​board.

[0016] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments in nuclear power plants, the human-computer interaction terminal is a touch display screen.

[0017] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments of nuclear power plants, the human-computer interaction terminal is used to receive the second interaction instruction and transmit the second interaction instruction to the CPU board;

[0018] The CPU board is also used to generate a bypass signal according to the second interactive instruction, and transmit the bypass signal to the earthquake monitoring instrument with the corresponding communication connection through the communication interface, so that the earthquake monitoring instrument is in a bypass state.

[0019] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments in nuclear power plants, the CPU board is also used to stop generating the test signal when the periodic test conditions are not met.

[0020] Preferably, in the above-mentioned periodic test device for earthquake monitoring instruments of a nuclear power plant, the human-computer interaction terminal is communicatively connected to a control room of the nuclear power plant.

[0021] Preferably, in the above-mentioned periodic testing device for earthquake monitoring instruments for nuclear power plants, a plurality of the earthquake monitoring instruments are connected to the earthquake shutdown system of the nuclear power plant, and the periodic testing device for earthquake monitoring instruments for nuclear power plants is integrated with the earthquake shutdown system.

[0022] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0023] The utility model provides a periodic test device for earthquake monitoring instruments of a nuclear power plant, wherein a plurality of earthquake monitoring instruments are arranged at different positions of the nuclear power plant, and the periodic test device for earthquake monitoring instruments of the nuclear power plant comprises: a human-computer interaction terminal, a CPU board and a communication interface; the human-computer interaction terminal and the communication interface are respectively communicatively connected with the CPU board, and the communication interface is communicatively connected with at least one earthquake monitoring instrument; wherein the human-computer interaction terminal is used for receiving a first interaction instruction and transmitting the first interaction instruction to the CPU board; the CPU board is used for periodically generating a test signal according to the first interaction instruction, and transmitting the test signal to the earthquake monitoring instrument of the corresponding communication connection through the communication interface; collecting a feedback signal generated by the earthquake monitoring instrument according to the test signal, and analyzing and processing the test signal and the feedback signal to generate a test result of the earthquake monitoring instrument; the human-computer interaction terminal is also used for displaying the test result. The periodic test device for earthquake monitoring instruments in nuclear power plants can perform online detection of earthquake monitoring instruments in nuclear power plants to form a closed-loop test without disassembling the earthquake monitoring instruments, reducing the periodic test operation steps of instrumentation and control maintenance personnel. In addition, both test operation and monitoring can be achieved through the human-computer interaction terminal, which greatly simplifies the operating load and displays results more intuitively and objectively. At the same time, the test results can be transmitted to the back-end control room in real time for online viewing. The test plan is easy to expand and greatly improves the test operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the principle of earthquake monitoring and automatic triggering of shutdown provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the principle structure of a periodic test device for earthquake monitoring instruments in nuclear power plants provided by an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments in nuclear power plants provided by an embodiment of the utility model;

[0028] Figure 4A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments in nuclear power plants provided by an embodiment of the utility model;

[0029] Figure 5 A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments in nuclear power plants provided by an embodiment of the utility model;

[0030] Figure 6 A schematic diagram of the logic principle of a periodic test of a seismic monitoring instrument provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Based on the content recorded in the background technology, nuclear-grade earthquake monitoring instruments are currently usually verified by regular calibration on an instrument test bench offline, and connected to the earthquake monitoring system for use after the calibration meets the accuracy requirements. Obviously, if the offline calibration is performed regularly on the instrument test bench, the earthquake monitoring instrument needs to leave the physical environment, and cannot form a complete channel with the corresponding control cabinet, so it cannot monitor the complete channel and cannot form a closed-loop monitoring; and the single-point detection method does not support the detection of complex system functions; the disassembly and installation of equipment makes the test process more cumbersome; the test data cannot be updated and uploaded online in a timely manner; and it is impossible to complete online regular testing of multiple earthquake monitoring instruments at the same time.

[0033] Based on this, the utility model provides a novel periodic testing device for earthquake monitoring instruments in nuclear power plants. The periodic testing device for earthquake monitoring instruments in nuclear power plants is a closed-loop, integrated, and highly interactive periodic testing device for earthquake monitoring instruments in nuclear power plants.

[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] refer to Figure 1 , Figure 1A schematic diagram of the principle of earthquake monitoring and automatic triggering of shutdown is provided for an embodiment of the utility model. A plurality of earthquake monitoring instruments are arranged at different positions of the nuclear power plant. The earthquake monitoring instruments are usually connected to the corresponding control cabinet as the acquisition terminal of the earthquake signal. The earthquake monitoring instrument transmits the collected earthquake signal to the control cabinet, and the control cabinet performs relevant logic processing. Data is collected by multiple earthquake monitoring instruments arranged at different positions of the nuclear power plant, and the signal is compared with the design reference value of the nuclear power plant after signal processing. When the design reference value is reached, the earthquake is triggered to automatically shut down the reactor. At the same time, it is also necessary to complete the analysis of the impact of earthquakes on buildings and major equipment based on earthquake signal records, so as to provide reliable data reference for the operation of nuclear power plants.

[0036] It can be seen that the accuracy of seismic signals collected by seismic monitoring instruments is directly related to the safety function of nuclear reactors. Therefore, nuclear-grade seismic monitoring instruments need to be tested regularly to ensure their normal operation.

[0037] refer to Figure 2 , Figure 2 A schematic diagram of the principle structure of a periodic test device for earthquake monitoring instruments in nuclear power plants provided in an embodiment of the utility model comprises: a human-computer interaction terminal 11, a CPU board 12 and a communication interface 13.

[0038] The human-computer interaction terminal 11 and the communication interface 13 are respectively connected to the CPU board 12 for communication, and the communication interface 13 is connected to at least one earthquake monitoring instrument 14 for communication.

[0039] The human-computer interaction terminal 11 is used to receive a first interaction instruction and transmit the first interaction instruction to the CPU board 12 .

[0040] The CPU board 12 is used to periodically generate a test signal according to the first interactive instruction, and transmit the test signal to the earthquake monitoring instrument 14 with a corresponding communication connection through the communication interface 13; collect the feedback signal generated by the earthquake monitoring instrument 14 according to the test signal, and analyze and process the test signal and the feedback signal to generate the test result of the earthquake monitoring instrument 14.

[0041] The human-computer interaction terminal 11 is also used to display the test results.

[0042] Exemplarily, the human-computer interaction terminal 11 includes but is not limited to a touch display screen.

[0043] Exemplarily, the human-computer interaction terminal 11 may also be communicatively connected to a control room or a monitoring room of the nuclear power plant.

[0044] Specifically, in this embodiment, the periodic test device for the earthquake monitoring instrument of the nuclear power plant can perform online detection on the earthquake monitoring instrument 14 of the nuclear power plant to form a closed-loop test without disassembling the earthquake monitoring instrument 14, thereby reducing the periodic test operation steps of the instrumentation and control maintenance personnel. Moreover, both the test operation and monitoring can be achieved through the human-computer interaction terminal 11, which greatly simplifies the operating load and displays the results more intuitively and objectively. At the same time, the test results can be transmitted to the back-end control room in real time for online viewing. The test plan is easy to expand and greatly improves the test operation efficiency.

[0045] It should be noted that nuclear power plants usually have two types of earthquake monitoring instruments, such as protection sequence earthquake monitoring instruments and monitoring sequence earthquake monitoring instruments. Regardless of the type of earthquake monitoring instrument, the periodic test device for earthquake monitoring instruments for nuclear power plants provided by the embodiment of the utility model can be applied to any type of earthquake monitoring instrument. Therefore, in the technical solution of the utility model, the periodic test of a single earthquake monitoring instrument is used as an example for explanation. The periodic test of multiple earthquake monitoring instruments only involves the expansion of the periodic test device, and does not involve changes in principle.

[0046] Optionally, in another embodiment of the present invention, refer to Figure 3 , Figure 3 A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments for nuclear power plants provided by an embodiment of the utility model. The periodic test device for earthquake monitoring instruments for nuclear power plants provided by an embodiment of the utility model also includes:

[0047] The network communication board 15 , the human-computer interaction terminal 11 is communicatively connected with the CPU board 12 via the network communication board 15 .

[0048] Specifically, in this embodiment, the network communication board 15 can improve the communication capability between the human-computer interaction terminal 11 and the CPU board 12, and can also play a role in signal isolation.

[0049] Optionally, in another embodiment of the present invention, refer to Figure 4 , Figure 4 A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments in nuclear power plants provided by the present utility model is shown in FIG. Figure 5 , Figure 5 A schematic diagram of the principle structure of another periodic test device for earthquake monitoring instruments in a nuclear power plant provided by an embodiment of the utility model, wherein the communication interface 13 includes: an AO board 16 and an AI board 17 .

[0050] The CPU board 12 transmits the test signal to the earthquake monitoring instrument 14 with a corresponding communication connection through the AO board 16 .

[0051] The CPU board 12 collects the feedback signal generated by the earthquake monitoring instrument 14 according to the test signal through the AI ​​board 17 .

[0052] It should be noted that in the embodiments of the present invention, only the AO board 16 and the AI ​​board 17 are used as examples for explanation. As long as it is an interface or board component that can realize data transmission, it can be applied to the technical solution of the present invention and will not be repeated here.

[0053] Optionally, in another embodiment of the utility model, a plurality of the earthquake monitoring instruments are connected to the earthquake shutdown system of the nuclear power plant, and the periodic test device for the earthquake monitoring instruments of the nuclear power plant is integrated with the earthquake shutdown system.

[0054] The following is a brief description of the working process of a periodic test device for earthquake monitoring instruments in nuclear power plants provided based on the above-mentioned embodiment of the utility model. The periodic test device for earthquake monitoring instruments in nuclear power plants is designed based on the principles of online closed-loop testing and friendly human-computer interaction, and is mainly divided into eight stages, including a test permission stage, a test startup stage, a test logic stage, a test signal output stage, a test signal receiving stage, a feedback signal output stage, a feedback signal transmission stage and a signal display stage.

[0055] In the test permission stage, before the earthquake monitoring instrument 14 is subjected to periodic tests, it is necessary to determine the environmental conditions for performing periodic tests, such as the operating status of other channel / sequence earthquake monitoring instruments, the bypass status of other channel / sequence earthquake monitoring instruments, the self-diagnosis alarm status of the control cabinet, etc., based on the specific type and function of the earthquake monitoring instrument 14 and the corresponding operating procedures of the nuclear power plant. Only when all the environmental conditions for periodic tests are met, periodic tests are allowed to be performed, otherwise periodic tests of earthquake monitoring instruments are not allowed to be performed. The status of all display conditions can be displayed and reminded through the interface of the human-computer interaction terminal, and the operator can intuitively understand whether the current conditions meet the working condition requirements of the periodic test through the interface of the human-computer interaction terminal. In other words, the CPU board 12 is also used to stop generating the test signal when the periodic test conditions are not met.

[0056] In the test startup phase, when all the periodic test environment conditions are met, the Bypass button and the periodic test Start button on the interface of the human-machine interaction terminal 11 will become operable, and the operator can start the periodic test of the earthquake monitoring instrument 14 by clicking the Bypass button and the periodic test Start button on the interface of the human-machine interaction terminal 11. For example, after operating the Bypass button, it is equivalent to the human-machine interaction terminal 11 being used to receive the first interaction instruction and transmit the first interaction instruction to the CPU board 12, and after operating the periodic test Start button, it is equivalent to the human-machine interaction terminal 11 being used to receive the second interaction instruction and transmit the second interaction instruction to the CPU board 12; the CPU board 12 is also used to generate a bypass signal according to the second interaction instruction, and transmit the bypass signal to the earthquake monitoring instrument 14 with the corresponding communication connection through the communication interface 13, so that the earthquake monitoring instrument 14 is in a bypass state. That is to say, the Bypass button on the interface of the human-computer interaction terminal 11 is used to control other related logical interlocks in the nuclear power plant and does not participate in the periodic test of the earthquake monitoring instrument 14 itself. Pressing the Bypass button on the interface of the human-computer interaction terminal 11 first plays the role of internal isolation, and then pressing the periodic test Start button on the interface of the human-computer interaction terminal 11 is equivalent to a second confirmation start.

[0057] In the test logic stage, refer to Figure 6 , Figure 6 A schematic diagram of the logic principle of a periodic test of a seismic monitoring instrument provided by an embodiment of the utility model. After the first interactive instruction and the second interactive instruction of the periodic test of the seismic monitoring instrument are transmitted to the CPU board 12, they are mainly used to generate the following instructions:

[0058] First, the start instruction of the periodic test of the earthquake monitoring instrument: the periodic test signal of the earthquake monitoring instrument can be generated when the earthquake monitoring instrument is in the bypass state, the operator presses the periodic test Start button, and all the periodic test environmental conditions are met.

[0059] Second, the reset command of the periodic test of the earthquake monitoring instrument: the earthquake monitoring instrument 14 is not in the bypass state, the operator presses the periodic test Start button and the fixed time delay, and any one of the periodic test environmental conditions is not met. The periodic test of the earthquake monitoring instrument can be reset when any of the above three conditions are met. It should be noted that the purpose of the fixed time delay after the operator presses the periodic test Start button is to trigger the reset command, for example, the periodic test command is automatically reset after the delay T time.

[0060] Third, the start instruction triggers the RS trigger (such as Figure 5The RS shown in the figure sends a test signal, which controls the pulse algorithm block to send a pulse signal (periodic waveform signals such as square waves and sine waves can be used). The pulse time can be set according to the length of the actual transmission path and is not limited in the embodiments of the present utility model.

[0061] In the test signal output stage, the test signal is transmitted to the corresponding communication-connected earthquake monitoring instrument 14 through the AO board 16 of the periodic test device.

[0062] During the test signal receiving stage, the earthquake monitoring instrument 14 collects the test signal through the analog input interface configured by the instrument itself.

[0063] In the feedback signal output stage, the seismic monitoring instrument 14 generates a feedback signal after receiving the test signal, and transmits the feedback signal to the CPU board 12. For example, after the seismic monitoring instrument 14 receives the test signal, it also outputs the test signal as a feedback signal to the periodic test device.

[0064] During the feedback signal transmission stage, the periodic test device of the earthquake monitoring instrument 14 collects the feedback signal through the AI ​​board 17 and then transmits it to the human-computer interaction terminal 11 via the network communication board 15 .

[0065] In the signal display stage, after receiving the feedback signal, the human-computer interaction terminal 11 can display it in the form of a trend curve on its interface. The trend curve can simultaneously display the sent test signal and the received feedback signal, which is used to compare whether the earthquake monitoring instrument 14 is operating normally.

[0066] It should be noted that all components in the embodiments of the present utility model are existing components in the prior art, and the analysis and processing of the signal does not involve any method or program improvement, and the signal processing can be implemented based on existing mature software.

[0067] The above is a detailed introduction to a periodic test device for earthquake monitoring instruments in nuclear power plants provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

[0068] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0069] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device that includes a series of elements is inherent to the elements, or also includes elements inherent to these processes, methods, articles or devices. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0070] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A periodic test device for earthquake monitoring instruments in nuclear power plants, characterized in that: A plurality of the earthquake monitoring instruments are arranged at different locations of the nuclear power plant, and the periodic test device for the earthquake monitoring instrument of the nuclear power plant comprises: a human-computer interaction terminal, a CPU board and a communication interface; The human-computer interaction terminal and the communication interface are respectively connected to the CPU board for communication, and the communication interface is connected to at least one of the earthquake monitoring instruments for communication; The human-computer interaction terminal is used to receive a first interaction instruction and transmit the first interaction instruction to the CPU board; The CPU board is used to periodically generate a test signal according to the first interactive instruction, and transmit the test signal to the seismic monitoring instrument with a corresponding communication connection through the communication interface; collect a feedback signal generated by the seismic monitoring instrument according to the test signal, and analyze and process the test signal and the feedback signal to generate a test result of the seismic monitoring instrument; The human-computer interaction terminal is also used to display the test results.

2. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: The periodic test device for the earthquake monitoring instrument of the nuclear power plant also includes: A network communication board, the human-computer interaction terminal is communicatively connected with the CPU board via the network communication board.

3. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: The communication interface includes: an AO board and an AI board; The CPU board transmits the test signal to the earthquake monitoring instrument corresponding to the communication connection through the AO board; The CPU board collects the feedback signal generated by the seismic monitoring instrument according to the test signal through the AI ​​board.

4. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: The human-computer interaction terminal is a touch display screen.

5. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: The human-computer interaction terminal is used to receive a second interaction instruction and transmit the second interaction instruction to the CPU board; The CPU board is also used to generate a bypass signal according to the second interactive instruction, and transmit the bypass signal to the earthquake monitoring instrument with the corresponding communication connection through the communication interface, so that the earthquake monitoring instrument is in a bypass state.

6. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: The CPU board is also used to stop generating the test signal when the periodic test conditions are not met.

7. The periodic test device for earthquake monitoring instruments for nuclear power plants according to claim 1, characterized in that: The human-computer interaction terminal is communicatively connected to the control room of the nuclear power plant.

8. The periodic test device for earthquake monitoring instruments in nuclear power plants according to claim 1, characterized in that: A plurality of the earthquake monitoring instruments are connected to the earthquake shutdown system of the nuclear power plant, and the periodic test device for the earthquake monitoring instruments of the nuclear power plant is integrated with the earthquake shutdown system.

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