CN213069198U - Source range neutron detector fault diagnosis device - Google Patents
Source range neutron detector fault diagnosis device Download PDFInfo
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- CN213069198U CN213069198U CN202021821289.0U CN202021821289U CN213069198U CN 213069198 U CN213069198 U CN 213069198U CN 202021821289 U CN202021821289 U CN 202021821289U CN 213069198 U CN213069198 U CN 213069198U
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Abstract
The utility model relates to a source range neutron detector fault diagnosis device, include: the system comprises a signal isolation module, a preceding-stage signal amplification module, a signal interface module, an original pulse processing unit, a signal discrimination processing unit and a terminal; the input end of the signal isolation module is connected with the detector, the output end of the signal isolation module is connected with the input end of the preceding signal amplification module, the output end of the preceding signal amplification module is connected with the input end of the signal interface module, the first output end of the signal interface module is connected with the input end of the original pulse processing unit, the output end of the original pulse processing unit is connected with the terminal, the second output end of the signal interface module is connected with the input end of the signal screening processing unit, and the output end of the signal screening processing unit is connected with the terminal. The diagnostic device can perform spectrum analysis on the original pulse signal to accurately predict the service life of the detector, and can also realize the copying of spare parts of the detector and timely find out a fault detector.
Description
Technical Field
The utility model relates to a neutron detector's technical field, more specifically say, relate to a source range neutron detector fault diagnosis device.
Background
In recent years, the source range neutron detector of a nuclear instrument measuring system of a nuclear power unit has high failure rate, and the overhaul state of a plurality of units is delayed or has great transient state due to the abnormal occurrence of the detector, thereby causing great threat to the safety of the units.
At present, according to a quality detection means of a source range neutron detector, a discrimination threshold curve and a high-pressure plateau curve (plateau curve for short) of the detector are drawn on line, and the aging evaluation and fault diagnosis of the detector are performed by analyzing the curve shape and the change condition. There are two disadvantages to this approach. Firstly, only the on-line detector can be used for detection, and off-line spare parts cannot be copied and plateau curve drawn, so that the purpose of finding out fault hidden danger spare parts in advance is achieved; secondly, the plateau curve adopts the amplified and discriminated standard pulse to analyze the performance of the detector, and the trend change of the original pulse in the aging process of the detector cannot be analyzed, so that the service life of the probe and the root cause of the fault cannot be accurately judged.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a source range neutron detector fault diagnosis device.
The utility model provides a technical scheme that its technical problem adopted is: constructing a source-scale neutron detector fault diagnosis device, comprising: the system comprises a signal isolation module, a preceding-stage signal amplification module, a signal interface module, an original pulse processing unit, a signal discrimination processing unit and a terminal;
the input of signal isolation module is connected with the detector, the output of signal isolation module with the input of preceding stage signal amplification module is connected, the output of preceding stage signal amplification module with the input of signal interface module is connected, the first output of signal interface module with the input of original pulse processing unit is connected, the output of original pulse processing unit with the terminal is connected, the second output of signal interface module with the input of signal screening processing unit is connected, the output of signal screening processing unit with the terminal is connected.
Preferably, the raw pulse processing unit includes: an original pulse acquisition module;
the input end of the original pulse acquisition module is the input end of the original pulse processing unit, and the output end of the original pulse acquisition module is the output end of the original pulse processing unit.
Preferably, the signal screening processing unit includes: the device comprises a signal discrimination module and a standard pulse acquisition module;
the input end of the signal screening module is connected with the second output end of the signal interface module, and the output end of the signal screening module is connected with the standard pulse acquisition module.
Preferably, the method further comprises the following steps: and the discrimination threshold regulator is connected with the signal discrimination module and used for regulating the discrimination threshold.
Preferably, the method further comprises the following steps: and the high-voltage regulator is connected with the signal isolation module and used for regulating the high-voltage signal.
Preferably, when the signal interface module is switched to the first output end, the signal isolation module, the preceding-stage signal amplification module, the signal interface module, the original pulse acquisition module and the terminal are communicated.
Preferably, when the signal interface module is switched to the second output end, the signal isolation module, the preceding-stage signal amplification module, the signal interface module, the signal screening module, the standard pulse acquisition module and the terminal are communicated.
Preferably, when the signal interface module is switched to the second output end, the discrimination threshold adjustor adjusts the discrimination threshold of the signal discrimination module and sends the discrimination threshold to the terminal;
and the terminal receives the discrimination threshold and the standard pulse signal sent by the standard pulse acquisition module and outputs a discrimination threshold curve according to the discrimination threshold and the standard pulse signal.
Preferably, when the signal interface module is switched to the second output end, the high-voltage regulator regulates the voltage of the probe of the detector and sends the regulated high-voltage value to the terminal;
and the terminal receives the high voltage value and the standard pulse signal sent by the standard pulse acquisition module and outputs a high voltage plateau curve according to the high voltage value and the standard pulse signal.
Preferably, the terminal includes: a display module;
the display module is used for displaying the original pulse signal, the standard pulse signal, the high plateau curve and the discrimination threshold curve output by the terminal.
Implement the utility model discloses a source range neutron detector fault diagnosis device has following beneficial effect: the method comprises the following steps: the system comprises a signal isolation module, a preceding-stage signal amplification module, a signal interface module, an original pulse processing unit, a signal discrimination processing unit and a terminal; the input end of the signal isolation module is connected with the detector, the output end of the signal isolation module is connected with the input end of the preceding signal amplification module, the output end of the preceding signal amplification module is connected with the input end of the signal interface module, the first output end of the signal interface module is connected with the input end of the original pulse processing unit, the output end of the original pulse processing unit is connected with the terminal, the second output end of the signal interface module is connected with the input end of the signal screening processing unit, and the output end of the signal screening processing unit is connected with the terminal. The diagnostic device can perform spectrum analysis on the original pulse signal to accurately predict the service life of the detector, and can also realize the copying of spare parts of the detector and timely find out a fault detector.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a source-range neutron detector fault diagnosis device provided by an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings.
In order to promote the detector fault diagnosis degree of accuracy, promote the ageing evaluation ability of detector to and further improve the reliability of detector and reduce fortune dimension cost, the utility model provides a source range neutron detector fault diagnosis device. The diagnostic device can be used for copying and plateau curve drawing of the source range neutron detector, and can also be used for carrying out spectrum analysis on the original pulse signal of the source range neutron detector.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an optional embodiment of the embodiments provided by the present invention.
Specifically, as shown in fig. 1, the source-scale neutron detector fault diagnosis apparatus may include: the system comprises a signal isolation module 101, a preceding-stage signal amplification module 102, a signal interface module 103, an original pulse processing unit, a signal discrimination processing unit and a terminal 20.
The input end of the signal isolation module 101 is connected with the detector, the output end of the signal isolation module 101 is connected with the input end of the preceding signal amplification module 102, the output end of the preceding signal amplification module 102 is connected with the input end of the signal interface module 103, the first output end of the signal interface module 103 is connected with the input end of the original pulse processing unit, the output end of the original pulse processing unit is connected with the terminal 20, the second output end of the signal interface module 103 is connected with the input end of the signal screening processing unit, and the output end of the signal screening processing unit is connected with the terminal 20.
In some embodiments, the signal isolation module 101 is used to isolate the dc high voltage from the pulsed signal of the detector. Specifically, it can be used to receive the dc high voltage set by the high voltage regulator 108 and transmit the pulse signal fed back by the detector to the preceding-stage signal amplifying module 102. The signal isolation module 101 may be implemented by a conventional isolation device, or may be implemented by an isolation circuit, for example, by a BCIG isolator. Of course, it is understood that in other embodiments, the signal isolation module 101 may be implemented by other isolation devices or isolation circuits as long as the signal isolation between the detector and the diagnostic apparatus can be achieved.
In some embodiments, the pre-stage signal amplification module 102 is configured to amplify the minute pulse signal into an acquirable pulse signal. Because the pulse signal of detector feedback is less, consequently, the utility model discloses a set up this preceding stage signal amplification module 102 and can amplify the pulse signal of detector feedback to the collection module that makes the back stage can gather the signal reliably and stably. Optionally, in some embodiments, the pre-stage signal amplifying module 102 may be implemented by using an existing conventional signal amplifier or a related signal amplifying circuit, which is not limited in this disclosure.
In some embodiments, the signal interface module 103 may be provided with a plurality of output interfaces to switch between the original pulse signal analysis function and the copy function, and as shown in fig. 1, a first output terminal and a second output terminal may be provided. Of course, it is understood that in other embodiments, the signal interface module 103 may further include a plurality of output interfaces, which may be specifically designed according to product test requirements. Wherein, the utility model discloses the copy machine function that indicates is for receiving the detector in the normal operating condition to the circular telegram, detect whether its function is normal etc. in detector circular telegram in-process. Optionally, in some embodiments, the signal interface module 103 may be implemented by an integrated interface module, and of course, in other embodiments, the signal interface module 103 may also be implemented by an existing switch, a switching circuit, and the like.
In some embodiments, the raw pulse processing unit comprises: a raw pulse acquisition module 104. The input end of the original pulse acquisition module 104 is the input end of the original pulse processing unit, and the output end of the original pulse acquisition module 104 is the output end of the original pulse processing unit.
The original pulse acquisition module 104 is configured to acquire a pulse signal and send the acquired pulse signal to the terminal 20. The original pulse acquisition module 104 has a high-speed acquisition function, and can acquire pulse signals with different amplitudes and areas.
In some embodiments, the signal screening processing unit includes: a signal screening module 105 and a standard pulse acquisition module 106. The input end of the signal screening module 105 is connected to the second output end of the signal interface module 103, and the output end of the signal screening module 105 is connected to the standard pulse acquisition module 106.
The signal screening module 105 is configured to screen the pulse signal amplified by the preceding-stage signal amplification module 102, and then transmit the pulse signal to the standard pulse acquisition module 106. Wherein the discrimination threshold of the signal discrimination module 105 can be set by a discrimination threshold adjuster. Specifically, the signal screening module 105 may screen the pulse signal according to a screening threshold. For example, when the pulse signal is smaller than the discrimination threshold, the pulse signal smaller than the discrimination threshold or the interference pulse signal not meeting the threshold requirement may be filtered, so as to ensure that the subsequent stage may receive the pulse signal meeting the discrimination threshold requirement. Alternatively, in some embodiments, the signal screening module 105 may be implemented by a conventional filter circuit or filter, as long as pulse signal screening is implemented.
In some embodiments, the standard pulse acquisition module 106 is configured to acquire the pulse signal that is output after being screened by the signal screening module 105, and send the acquired pulse signal to the terminal 20.
In some embodiments, the fault diagnosis apparatus may further include: a discrimination threshold adjuster 107 connected to the signal discrimination module 105 for adjusting a discrimination threshold. In some embodiments, the screening threshold adjustor is configured to set a screening threshold of the signal screening module 105 and send the set screening threshold to the terminal 20.
In some embodiments, the fault diagnosis apparatus may further include: and a high-voltage regulator 108 connected to the signal isolation module 101 for regulating the high-voltage signal.
The high voltage regulator 108 is configured to set a detector detection voltage, and transmit the detector detection voltage to the preceding-stage signal amplification module 102 through the signal isolation module 101. Further, the voltage set by the high voltage regulator 108 may be communicated to the terminal 20 in real time.
In some embodiments, when the signal interface module 103 is switched to the first output terminal, the signal isolation module 101, the previous stage signal amplification module 102, the signal interface module 103, the original pulse acquisition module 104 and the terminal 20 are connected. Further, when the signal interface module 103 is switched to the first output terminal, the original pulse analysis function can be implemented.
Specifically, the pulse signal amplified by the preceding-stage signal amplification module 102 is sent to the original pulse acquisition module 104, and the original pulse signal is output to the terminal 20 after being acquired by the original pulse acquisition module 104. The terminal 20 receives the original pulse signal transmitted by the original pulse acquisition module 104, and performs a screening process on the received original pulse signal to screen out the amplitude and the area of the qualified original pulse, and predicts the service life of the detector according to the amplitude distribution and the area distribution.
In some embodiments, when the signal interface module 103 is switched to the second output terminal, the signal isolation module 101, the preceding signal amplification module 102, the signal interface module 103, the signal screening module 105, the standard pulse acquisition module 106 and the terminal 20 are in communication.
When the signal interface module 103 is switched to the second output end, the discrimination threshold adjustor adjusts the discrimination threshold of the signal discrimination module 105 and sends the discrimination threshold to the terminal 20; the terminal 20 receives the discrimination threshold and the first standard pulse signal sent by the standard pulse acquisition module 106, and outputs a discrimination threshold curve according to the discrimination threshold and the first standard pulse signal.
Specifically, when the signal interface module 103 is switched to the second output terminal, the copy function can be realized. The spare part detector can be connected into the device, pulse signals fed back by the spare part detector are transmitted to the signal screening module 105 after passing through the preceding signal amplification module 102, the pulse signals are collected by the standard pulse collection module 106 and transmitted to the terminal 20 after being screened by the signal screening module 105, the terminal 20 displays current signals and trends, the quality of the spare part detector is detected by monitoring the signals and the trends within a period of time, and abnormal detectors with fault modes such as flash counting, counting drifting and the like are screened out in time.
Further, when the signal interface module 103 is switched to the second output end, in this mode, if the field detector channel is abnormal, the detector cable can be directly connected to the fault diagnosis device (i.e., the detector cable is directly connected to the signal isolation module 101), or the cabinet side cable is directly connected to the fault diagnosis device (i.e., the cabinet side cable is connected to the signal isolation module 101), so as to detect through the fault diagnosis device, and further check whether the fault is recurring, so that the fault point can be quickly located on the detection side, the cabinet side or the cable side. By the method, the field fault finding efficiency can be greatly improved.
Or, when the signal interface module 103 is switched to the second output terminal, in this mode, the high voltage regulator 108 regulates the voltage of the probe of the detector and sends the regulated high voltage value to the terminal 20; the terminal 20 receives the high voltage value and the second standard pulse signal sent by the standard pulse acquisition module 106, and outputs a high voltage plateau curve according to the high voltage value and the second standard pulse signal. Specifically, the voltage of the detector probe may be set by the high-voltage regulator 108, and after the voltage is set by the high-voltage regulator 108, the pulse signal fed back by the detector is amplified by the pre-stage signal amplification module 102, and then transmitted to the signal screening module 105, and then is screened by the signal screening module 105 and transmitted to the standard pulse acquisition module 106 for acquisition, and then is acquired by the standard pulse acquisition module 106 and transmitted to the terminal 20, meanwhile, the voltage set by the high-voltage regulator 108 is transmitted to the terminal 20, and the terminal 20 receives the pulse signal transmitted by the standard pulse acquisition module 106 and the voltage value transmitted by the high-voltage regulator 108, displays the second standard pulse signal transmitted by the standard pulse acquisition module 106 and the high-voltage value transmitted by the high-voltage regulator 108, and performs high-voltage plateau curve drawing and output display based on the received second standard pulse signal and the high-voltage value.
Or, when the signal interface module 103 is switched to the second output end, in this mode, the discrimination threshold adjustor adjusts and sets the threshold of the signal discrimination module 105, the signal discrimination module 105 discriminates the pulse signal amplified by the preceding signal amplification module 102 according to the set discrimination threshold, outputs the discriminated pulse signal to the standard pulse acquisition module 106, the standard pulse acquisition module 106 adopts and transmits the pulse signal to the terminal 20, meanwhile, the discrimination threshold adjustor further transmits the set discrimination threshold to the terminal 20, the terminal 20 receives the first standard pulse signal transmitted by the standard pulse acquisition module 106 and the discrimination threshold transmitted by the discrimination threshold module for displaying, and performs discrimination threshold curve drawing and output displaying based on the received first standard pulse signal and the discrimination threshold. Thereby enabling the assessment and prediction of detector aging.
Further, in some embodiments, the terminal 20 includes: and a display module. The display module is used for displaying the original pulse signal, the standard pulse signal (the first standard signal and the second standard signal), the high voltage value, the discrimination threshold, the high voltage plateau curve and the discrimination threshold curve output by the terminal 20.
Further, the terminal 20 further includes a processor, which is configured to analyze the original pulse signal and the standard pulse signal, and draw a high-plateau curve and a discrimination-threshold curve according to the second standard pulse signal and the high-voltage value, and the first standard pulse signal and the discrimination threshold, respectively.
Through implementing the utility model discloses a source range neutron detector fault diagnosis device can realize carrying out spectral analysis to the original pulse signal of source range neutron detector, through the two-parameter spectral distribution and the evolution condition of pulse amplitude and area, combines plateau curve drawing result, can accurate prediction detector's life-span.
In addition, the method can also realize copying of the spare parts of the neutron detector, screen out the fault detector through signal and trend monitoring, solve the long-term dilemma that no reliable spare part detection means exists, and avoid the problem that the fault detector is used on the spot to cause major repair critical path delay or unit transient state. When complex faults occur in the neutron detector channel on site, compared with the original all-channel links, the device can be used for conducting one-by-one troubleshooting, fault points can be rapidly and accurately located, and the fault processing efficiency is greatly improved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention. It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (10)
1. A source-scale neutron detector fault diagnostic apparatus, comprising: the system comprises a signal isolation module, a preceding-stage signal amplification module, a signal interface module, an original pulse processing unit, a signal discrimination processing unit and a terminal;
the input of signal isolation module is connected with the detector, the output of signal isolation module with the input of preceding stage signal amplification module is connected, the output of preceding stage signal amplification module with the input of signal interface module is connected, the first output of signal interface module with the input of original pulse processing unit is connected, the output of original pulse processing unit with the terminal is connected, the second output of signal interface module with the input of signal screening processing unit is connected, the output of signal screening processing unit with the terminal is connected.
2. The source-scale neutron detector fault diagnostic device of claim 1, wherein the raw pulse processing unit comprises: an original pulse acquisition module;
the input end of the original pulse acquisition module is the input end of the original pulse processing unit, and the output end of the original pulse acquisition module is the output end of the original pulse processing unit.
3. The source-scale neutron detector fault diagnosis device according to claim 1, wherein the signal discrimination processing unit comprises: the device comprises a signal discrimination module and a standard pulse acquisition module;
the input end of the signal screening module is connected with the second output end of the signal interface module, and the output end of the signal screening module is connected with the standard pulse acquisition module.
4. The source-scale neutron detector fault diagnostic device of claim 3, further comprising: and the discrimination threshold regulator is connected with the signal discrimination module and used for regulating the discrimination threshold.
5. The source-scale neutron detector fault diagnostic device of claim 3, further comprising: and the high-voltage regulator is connected with the signal isolation module and used for regulating the high-voltage signal.
6. The source-scale neutron detector fault diagnosis device of claim 2, wherein the signal isolation module, the pre-stage signal amplification module, the signal interface module, the original pulse acquisition module and the terminal are communicated when the signal interface module is switched to the first output terminal.
7. The source-scale neutron detector fault diagnosis device according to claim 3, wherein when the signal interface module is switched to a second output end, the signal isolation module, the preceding signal amplification module, the signal interface module, the signal screening module, the standard pulse acquisition module and the terminal are communicated.
8. The source-scale neutron detector fault diagnosis device according to claim 4, wherein when the signal interface module is switched to the second output end, the discrimination threshold adjustor adjusts the discrimination threshold of the signal discrimination module and sends the discrimination threshold to the terminal;
and the terminal receives the discrimination threshold and the standard pulse signal sent by the standard pulse acquisition module and outputs a discrimination threshold curve according to the discrimination threshold and the standard pulse signal.
9. The source-scale neutron detector fault diagnosis device of claim 5, wherein when the signal interface module is switched to a second output end, the high-voltage regulator regulates the voltage of the probe of the detector and sends the regulated high-voltage value to a terminal;
and the terminal receives the high voltage value and the standard pulse signal sent by the standard pulse acquisition module and outputs a high voltage plateau curve according to the high voltage value and the standard pulse signal.
10. The source-scale neutron detector fault diagnostic device of claim 1, wherein the terminal comprises: a display module;
the display module is used for displaying the original pulse signal, the standard pulse signal, the high plateau curve and the discrimination threshold curve output by the terminal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418942A (en) * | 2021-06-23 | 2021-09-21 | 中国核动力研究设计院 | Automatic calibration method and device for boron concentration measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418942A (en) * | 2021-06-23 | 2021-09-21 | 中国核动力研究设计院 | Automatic calibration method and device for boron concentration measurement system |
| CN113418942B (en) * | 2021-06-23 | 2024-02-06 | 中国核动力研究设计院 | Automatic calibration method and device for boron concentration measurement system |
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