CN213023588U - Current fault diagnosis device and system for ionization chamber type detector - Google Patents
Current fault diagnosis device and system for ionization chamber type detector Download PDFInfo
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- CN213023588U CN213023588U CN202021510676.2U CN202021510676U CN213023588U CN 213023588 U CN213023588 U CN 213023588U CN 202021510676 U CN202021510676 U CN 202021510676U CN 213023588 U CN213023588 U CN 213023588U
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Abstract
The utility model discloses an ionization chamber formula detector current fault diagnostic device and system, the device includes: the ionization chamber type detector comprises a high-voltage unit for providing positive high-voltage operation for the ionization chamber type detector, a current measuring channel for recording a current signal of the ionization chamber type detector, a current amplifying unit connected with the current measuring channel and used for amplifying the current signal, a signal converting unit used for carrying out analog-to-digital conversion processing on the amplified signal, a current measuring unit used for measuring the converted current signal and a microprocessor for analyzing and judging whether the ionization chamber type detector has faults or not according to the measured current signal. Through implementing the utility model discloses, can fix a position ionization chamber formula detector current anomaly's fault point fast, improve fault handling efficiency greatly, provide technical guarantee for nuclear power station reactor outer neutron measurement system reliable steady operation. Meanwhile, the device has the function of drawing the high-voltage plateau curve of the detector and can automatically judge the performance of the detector.
Description
Technical Field
The utility model relates to a nuclear power station technical field especially relates to an ionization chamber formula detector current fault diagnostic device and system that nuclear power station used.
Background
A nuclear instrument measurement system (RPN) of a domestic nuclear power station is used for measuring neutron flux outside a reactor, and neutron detectors produced by Rolls-Royce are adopted. The RPN system adopts three detectors with different measuring ranges, wherein the used middle-range and power-range detectors use an ionization chamber to detect high neutron flux of a reactor, a transmission signal is a current signal, and the measuring range is (1E-11-1E-3) A.
The domestic nuclear power station has the problems of intermediate range or power range current signal flash, abnormal current and the like. The current fault handling means is a method of sectional troubleshooting, namely sectional judgment of cabinet side fault or detector side fault, and has strong dependence on technical experience of maintenance engineers. At present, a special detection device can simulate a cabinet, and replace the function of the cabinet to judge whether a detector or the cabinet has problems, so that the fault processing needs to be carried out from all aspects such as the cabinet and the detector every time, the fault processing is complicated, the time consumption is long, even the fault possibly disappears in the processing process and cannot be caught, and the fault positioning misjudgment is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that, to prior art's defect, a ionization chamber formula detector current fault diagnosis device and system are provided.
The utility model provides a technical scheme that its technical problem adopted is: a current fault diagnosis device for an ionization chamber type detector is constructed, and comprises: the ionization chamber type detector comprises a high-voltage unit for providing positive high-voltage operation for the ionization chamber type detector, a current measuring channel for recording a current signal of the ionization chamber type detector, a current amplifying unit connected with the current measuring channel and used for amplifying the current signal, a signal converting unit used for carrying out analog-to-digital conversion processing on the amplified signal, a current measuring unit used for measuring the converted current signal, and a microprocessor for analyzing and judging whether the ionization chamber type detector has faults or not according to the measured current signal.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the ionization chamber type detector includes a middle range detector;
the ionization chamber type detector current fault diagnosis device further comprises: the negative high-voltage unit is used for providing negative high voltage for the intermediate range detector to filter interference signals;
the current measurement channel comprises a mid-range current measurement channel.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the ionization chamber type detector includes a power range detector;
the current measurement channel comprises a power range current measurement channel.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the ionization chamber type detector current fault diagnosis device further includes: a switching unit for switching the connection of the current amplification unit and the intermediate-range current measurement channel or the power-range current measurement channel.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the current measurement range of the current measurement channel is (1E-12-1E-3) a.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the ionization chamber type detector current fault diagnosis device further includes: and the plateau curve drawing unit is connected with the signal conversion unit and is used for automatically drawing a high-pressure plateau curve according to the positive high voltage provided by the high-voltage unit and the signal converted by the signal conversion unit.
Preferably, ionization chamber formula detector current fault diagnosis device in, the positive high pressure control range of high-pressure unit is 0 ~ 800V, and high-pressure test port is reserved to its high-pressure output.
Preferably, in the ionization chamber type detector current fault diagnosis device of the present invention, the negative high voltage regulation range of the negative high voltage unit is 0 to-150V, and the negative high voltage output end thereof reserves the negative high voltage test port.
The utility model also constructs an ionization chamber type detector current fault diagnosis system, including ionization chamber type detector and above-mentioned arbitrary ionization chamber type detector current fault diagnosis device.
Through implementing the utility model discloses, following beneficial effect has:
the utility model discloses a develop an ionization chamber formula detector current fault diagnosis device, can effectively improve the detection means of current ionization chamber formula detector current fault, can fix a position the unusual fault point of ionization chamber formula detector current fast, improve fault handling efficiency greatly, provide technical guarantee for nuclear power station reactor neutron measurement system reliable steady operation outside the reactor. Meanwhile, the device has the function of automatically drawing the curve of the high-pressure plateau of the detector, and can automatically judge the performance of the detector.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic diagram of the current fault diagnosis device of the ionization chamber type detector of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in order to improve the current diagnosis processing level of the ionization chamber type detector and to quickly locate the fault position, the utility model discloses an ionization chamber type detector current fault diagnosis device is constructed, specifically, it includes: the ionization chamber type detector comprises a high-voltage unit for providing positive high-voltage operation for the ionization chamber type detector, a current measuring channel for recording a current signal of the ionization chamber type detector, a current amplifying unit connected with the current measuring channel and used for amplifying the current signal, a signal converting unit used for carrying out analog-to-digital conversion processing on the amplified signal, a current measuring unit used for measuring the converted current signal and a microprocessor for analyzing and judging whether the ionization chamber type detector has faults or not according to the measured current signal. In some embodiments, the current amplifying unit is an amplifying circuit, the signal converting unit is an a/D converting circuit, the current measuring unit is a measuring circuit, and the microprocessor is an MCU.
Wherein, ionization chamber formula detector includes middle span detector, and corresponding ionization chamber formula detector current fault diagnostic device still includes: and the negative high-voltage unit is used for providing negative high voltage for the intermediate range detector, and is used for compensating so as to filter interference signals, and as shown in fig. 1, the negative high voltage is provided for the intermediate range detector through a channel 1. The high voltage unit provides positive high voltage operation for the mid-range detector through channel 3. Also included on the current measurement channel is a mid-range current measurement channel 2.
The ionization chamber detector includes a power range detector. The current measurement channels include power span current measurement channels 4-9. The high voltage unit provides positive high voltage operation for the power range detector through channel 3.
And, in some embodiments, the current measuring range of the current measuring channels 2, 4-9 is (1E-12 ~ 1E-3) A, covering the measuring range of the ionization chamber type detector (1E-11 ~ 1E-3) A.
The neutron detector in the compensation ionization chamber and the non-compensation ionization chamber generates micro-current signals, the amplification circuit in the current amplification unit is used for realizing the conversion from current to voltage, the amplified signals are subjected to A/D (analog-to-digital) conversion by the signal conversion unit, then the converted signals are measured by the current measurement unit and finally transmitted to the microprocessor for processing, and whether the ionization chamber type detector has faults or not is analyzed and judged.
In addition, in some embodiments, the device has the capability of direct-current high-voltage stable output, provides high voltage and negative high voltage for the ionization chamber type detector, and the high voltage is continuously adjustable. The positive high-voltage regulation range is 0-800V, and a high-voltage test port, such as a test port of HV/100, is reserved for high-voltage output; the negative high voltage regulating range is 0-150V, and a negative high voltage testing port, such as a-HV/15 testing port, is reserved for negative high voltage output.
The ionization chamber type detector current fault diagnosis device is provided with accurate measurement of current signals of two different detectors of a compensation ionization chamber and an uncompensated ionization chamber. The device possesses 6 independent power range current measurement channels 4-9, measures the current signal of uncompensated ionization chamber detector, possesses 1 independent middle range current measurement channel 2, measures the current signal of compensated ionization chamber detector, and the current measurement scope of each channel is: (1E-12-1E-3) A, each channel has a data recording function and can record abnormal fluctuation in the monitoring process. Wherein, the error in the (1E-12-1E-11) A magnitude is less than 10%, and the error in the (1E-11-1E-3) A magnitude is less than 3%. Through current measurement and monitoring, whether the ionization chamber type detector has a fault or not is judged, and therefore the fault point is located on the cabinet side or the detector side quickly.
Therefore, the ionization chamber type detector current fault diagnosis device replaces the current measurement function of a cabinet, realizes the accurate measurement of the current signal of the ionization chamber detector, can cover the measurement range of the detector in measurement accuracy, can normally provide the high voltage and negative high voltage functions of the detector, and can quickly judge the current abnormal fault point through the function.
In some embodiments, the ionization chamber type detector current fault diagnosis device has an automatic drawing function of a high voltage plateau curve, processes data after signal conversion, and automatically judges the performance of the detector according to a test result and a preset detection standard. Thus, the method further comprises the following steps: and the plateau curve drawing unit is connected with the signal conversion unit and is used for automatically drawing the high-pressure plateau curve according to the positive high voltage provided by the high-voltage unit and the signal converted by the signal conversion unit. It will be appreciated that under normal ionization chamber detector conditions, the current signal produced by the ionization chamber detector can be varied by adjusting the voltage of the positive high voltage to plot the high voltage plateau as a standard. Naturally, also can be when ionization chamber formula detector working phase, draw high pressure plateau curve automatically thus contrast the high pressure plateau curve of standard, the performance index of automatic evaluation ionization chamber formula detector, and give the evaluation result according to the judgement standard that sets up, judge whether the detector has the trend that the performance ageing is declined.
In some embodiments, since the ionization chamber type detector includes a power range detector and a middle range detector, in order to implement switching of diagnosis functions of two different types of ionization chamber detectors of a middle range and a power range, the ionization chamber type detector can simultaneously monitor current signals, and has recording and comparative analysis functions, the ionization chamber type detector current fault diagnosis apparatus further includes: and the switching unit is used for switching the connection between the current amplification unit and the middle-range current measurement channel or the power-range current measurement channel.
In some embodiments, the present invention further provides an ionization chamber type detector current fault diagnosis system, which includes an ionization chamber type detector and the ionization chamber type detector current fault diagnosis device described in the above embodiments.
Through implementing the utility model discloses, following beneficial effect has:
the current fault processing means of the original ionization chamber type detector mostly depends on the experience of a maintenance engineer, the fault processing needs to be carried out from all aspects such as a cabinet and a detector when the fault processing is carried out each time, the fault processing is complicated, the time consumption is long, even the fault possibly disappears in the processing process and cannot be caught, and the fault positioning misjudgment is caused.
The utility model discloses a develop an ionization chamber formula detector current fault diagnosis device, can effectively improve the detection means of current ionization chamber formula detector current fault, can fix a position the unusual fault point of ionization chamber formula detector current fast, improve fault handling efficiency greatly, provide technical guarantee for nuclear power station reactor neutron measurement system reliable steady operation outside the reactor. Meanwhile, the device has the function of automatically drawing the curve of the high-pressure plateau of the detector, and can automatically judge the performance of the detector.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (9)
1. An ionization chamber type detector current fault diagnosis apparatus, comprising: the ionization chamber type detector comprises a high-voltage unit for providing positive high-voltage operation for the ionization chamber type detector, a current measuring channel for recording a current signal of the ionization chamber type detector, a current amplifying unit connected with the current measuring channel and used for amplifying the current signal, a signal converting unit used for carrying out analog-to-digital conversion processing on the amplified signal, a current measuring unit used for measuring the converted current signal, and a microprocessor for analyzing and judging whether the ionization chamber type detector has faults or not according to the measured current signal.
2. The ionization chamber detector current fault diagnostic device of claim 1, wherein the ionization chamber detector comprises a mid-range detector;
the ionization chamber type detector current fault diagnosis device further comprises: the negative high-voltage unit is used for providing negative high voltage for the intermediate range detector to filter interference signals;
the current measurement channel comprises a mid-range current measurement channel.
3. The ionization chamber detector current fault diagnostic device of claim 2, wherein the ionization chamber detector comprises a power range detector;
the current measurement channel comprises a power range current measurement channel.
4. The ionization chamber type detector current fault diagnosis device according to claim 3, further comprising: a switching unit for switching the connection of the current amplification unit and the intermediate-range current measurement channel or the power-range current measurement channel.
5. The ionization chamber type detector current fault diagnosis device according to claim 1, wherein the current measurement range of the current measurement channel is (1E-12-1E-3) A.
6. The ionization chamber type detector current fault diagnosis device according to claim 1, further comprising: and the plateau curve drawing unit is connected with the signal conversion unit and is used for automatically drawing a high-pressure plateau curve according to the positive high voltage provided by the high-voltage unit and the signal converted by the signal conversion unit.
7. The ionization chamber type detector current fault diagnosis device as claimed in claim 1, wherein the positive high voltage regulation range of the high voltage unit is 0-800V, and a high voltage test port is reserved at a high voltage output end of the high voltage unit.
8. The ionization chamber type detector current fault diagnosis device of claim 2, characterized in that the negative high voltage regulation range of the negative high voltage unit is 0-150V, and a negative high voltage test port is reserved at the negative high voltage output end of the negative high voltage unit.
9. An ionization chamber type detector current fault diagnosis system, characterized by comprising an ionization chamber type detector and an ionization chamber type detector current fault diagnosis device of any one of claims 1 to 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
| CN115641973B (en) * | 2022-09-09 | 2024-05-07 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
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