CN203350455U - Nuclear radiation monitoring system fault diagnostic device - Google Patents
Nuclear radiation monitoring system fault diagnostic device Download PDFInfo
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- CN203350455U CN203350455U CN 201320379612 CN201320379612U CN203350455U CN 203350455 U CN203350455 U CN 203350455U CN 201320379612 CN201320379612 CN 201320379612 CN 201320379612 U CN201320379612 U CN 201320379612U CN 203350455 U CN203350455 U CN 203350455U
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Abstract
The utility model pertains to the field of nuclear radiation monitoring, and provides a nuclear radiation monitoring system fault diagnostic device. The nuclear radiation monitoring system fault diagnostic device comprises a simulated radiation detector and a fault diagnostic apparatus. The nuclear radiation monitoring system fault diagnostic device can be used in mutual inspection between the simulated radiation detector and the fault diagnostic apparatus. The simulated radiation detector is used to perform fault diagnosis on a radiation monitoring system signal processing device. The fault diagnostic apparatus is used to perform fault diagnosis on a real radiation detector. The diagnostic process and the diagnostic result can be stored and displayed on a computer. The nuclear radiation monitoring system fault diagnostic device of the utility model has advantages of simple structure, easy carry and convenient utilization, and can be used for rapidly positioning fault points, improving the diagnostic efficiency, and reducing the maintenance cost, so has advantages of good practical value and popularization value.
Description
Technical field
The utility model belongs to nuclear radiation monitoring system equipment area of maintenance, relates to a kind of nuclear radiation monitoring system fault diagnosis device, is applicable to system maintenance and the trouble hunting of nuclear power station and nuclear ship.
Background technology
All the time, the trouble hunting of nuclear power station or nuclear ship is all to rely on the professional and technical personnel of device fabrication producer is investigated and locate to diagnose nuclear radiation monitoring system trouble hunting pattern to fault, this pattern requires high to maintainer's specialty background, time between overhauls(TBO) is long, the cost costliness, seriously restricted nuclear plant safety production and nuclear ship at ETS estimated time of sailing.And the instrument that the professional and technical personnel selects while carrying out trouble hunting consists essentially of the multiple professional service kits such as multimeter, pulse signal generator and current signal generator and self-control special high-pressure surveying instrument.This malfunction elimination mode that simultaneously needs to carry multiple service kit has caused very inconvenience when the trouble hunting to the Technical Maintenance Staff.Therefore, the Technical Maintenance Staff is expecting to have the special-purpose trouble hunting instrument of a portable multi-function always.
By summing up the breakdown maintenance experience of nuclear radiation monitoring system, find fault occurrence frequency the highest be certain or certain several aspects of the signal processing apparatus of radiation detector, stube cable and nuclear radiation monitoring system.In sum, present stage is badly in need of a portable, can locate fast the fault origination point, improves diagnosis efficiency, reduces the nuclear radiation monitoring system failure quick diagnosis device of maintenance cost.
Summary of the invention
The purpose of this utility model is exactly in order to fill up the blank part of prior art, and a kind of nuclear radiation monitoring system fault diagnosis device is provided, and it is simple in structure, is easy to carry, easy to use, and diagnostic result accurately and reliably.
The purpose of this utility model is achieved by the following technical measures: a kind of nuclear radiation monitoring system fault diagnosis device, comprise simulation radiation detector and failure diagnostic apparatus, described simulation radiation detector is by single-chip microcomputer, power-switching circuit, high-voltage pulse and low voltage pulse signal circuit for generating, 4 ~ 20mA current occuring circuit, the analog quantity sample circuit, liquid crystal display drive circuit, key control circuit and SCM peripheral the electric circuit constitute, described high-voltage pulse and low voltage pulse signal circuit for generating, 4 ~ 20mA current occuring circuit, the analog quantity sample circuit, liquid crystal display drive circuit all is connected with single-chip microcomputer with key control circuit, the output terminal of power-switching circuit provides operating voltage for each built-up circuit of simulation radiation detector, described failure diagnostic apparatus is by single-chip microcomputer, power-switching circuit, circuit for producing high voltage, high-voltage control circuit, the high pressure sample circuit, high-voltage pulse and low voltage pulse signal treatment circuit, 4 ~ 20mA current signal treatment circuit, the serial communication driving circuit, liquid crystal display drive circuit, key control circuit and SCM peripheral the electric circuit constitute, described high-voltage pulse and low voltage pulse signal treatment circuit, 4 ~ 20mA current signal treatment circuit, circuit for producing high voltage, high-voltage control circuit, the high pressure sample circuit, the serial communication driving circuit, liquid crystal display drive circuit all is connected with single-chip microcomputer with key control circuit, the output terminal of power-switching circuit provides operating voltage for each built-up circuit of failure diagnostic apparatus.
In technique scheme, failure diagnostic apparatus is used in conjunction with the computing machine that the failure diagnostic apparatus special software is installed, for computer stored and demonstration diagnostic procedure and diagnostic result.
In technique scheme, the power-switching circuit of described simulation radiation detector and failure diagnostic apparatus is identical, all adopt battery-powered, the electric battery output terminal is through TEN8-2421WI chip output ± 12V, the electric battery output terminal is through TEN8-2411WI chip output+5V, and+5V is through SPX117-3.3 voltage stabilizing chip output+3.3V.
In technique scheme, the comprise+12V of analog quantity sample circuit of described simulation radiation detector ,-metering circuit of the positive high voltage value of 12V, positive high voltage value, negative high voltage value and high-voltage pulse; The high pressure sample circuit of failure diagnostic apparatus comprises the metering circuit of positive high voltage value and negative high voltage value; The metering circuit of described ± 12V for+12V ,-the 12V analog quantity obtains sampling voltage through bleeder circuit respectively, after sampling hold circuit, output voltage is input to respectively the analog input channel of AD7327 modulus conversion chip as sampled signal again, the AD7327 modulus conversion chip is output as HSSI High-Speed Serial Interface, with SPI serial bus mode and single-chip microcomputer, carries out data communication; The positive high voltage analog quantity that the metering circuit of the positive high voltage value of described positive high voltage value, negative high voltage value and high-voltage pulse is positive high voltage, negative high voltage and high-voltage pulse obtains the high-pressure sampling value through a bleeder circuit respectively, again respectively after RC filtering circuit and sampling hold circuit output voltage be input to respectively the analog input channel of AD7327 chip as sampled signal, the output terminal of AD7327 modulus conversion chip is HSSI High-Speed Serial Interface, with SPI serial bus mode and single-chip microcomputer, carries out data communication.
In technique scheme, the high-voltage pulse signal of described simulation radiation detector and low voltage pulse signal circuit for generating adopt the PWM module of LPC1768 chip single-chip microcomputer to produce pulse signal, export low voltage pulse signal after the isolation of pulse transformer isolation driving circuit, through the isolation of pulse transformer isolation driving circuit, export high-voltage pulse signal through high pressure after straight again.
In technique scheme, 4 ~ 20mA current occuring circuit of described simulation radiation detector adopts LPC1768 chip single-chip microcomputer to produce set of number amount signal, through the AD420 analog-digital chip, converts the output of 4 ~ 20mA current signal to.
In technique scheme, the positive high voltage module that the circuit for producing high voltage of described failure diagnostic apparatus is+1400V ~ 0V by output area and output area be 0V ~-two modules of the negative high voltage module of 1000V form, described high-voltage control circuit adopts the SPI serial bus of single-chip microcomputer to send the high voltage control instruction, SPI serial bus data convert high voltage control signal to through the AD5724 analog-digital chip, output to positive and negative high-pressure modular, form a high pressure conditioned circuit with positive and negative high-pressure modular, for exporting different magnitudes of voltage.
In technique scheme, the high-voltage pulse of described failure diagnostic apparatus and low voltage pulse signal treatment circuit are divided into high-voltage pulse treatment circuit and low voltage pulse signal treatment circuit, the input termination high-voltage pulse input signal of high-voltage pulse signal treatment circuit, the high-voltage pulse input signal enters the inverting input of the operational amplifier that model is LM111 after straight through high pressure, the in-phase input end of operational amplifier fetches the first threshold voltage from the output terminal of AD5724 analog-digital chip, the signal of the output terminal of operational amplifier is the high-voltage pulse counting rate, high-voltage pulse counting rate signal directly connects the timer module of LPC1768 chip single-chip microcomputer and carries out the software processing, the software result through liquid crystal display circuit in liquid crystal screen display pulse signal result, the input termination action of low-voltage pulse input signal of low voltage pulse signal treatment circuit, the action of low-voltage pulse input signal enters the inverting input of the operational amplifier that model is LM111, the in-phase input end of operational amplifier fetches the Second Threshold voltage from the output terminal of AD5724 analog-digital chip, the signal of the output terminal of operational amplifier is the action of low-voltage pulse counting rate, action of low-voltage pulse counting rate signal directly connects the timer module of LPC1768 chip single-chip microcomputer and carries out the software processing, the software result through liquid crystal display circuit in liquid crystal screen display pulse signal result, described first threshold voltage and Second Threshold voltage, respectively by the software setting of single-chip microcomputer, export the serial ports input pin of AD5724 analog-digital chip to through the SPI serial bus, then export via the output pin of AD5724 analog-digital chip.
In technique scheme, input termination 4 ~ 20mA current signal of the current signal treatment circuit of described failure diagnostic apparatus, 4 ~ 20mA current signal is converted to the voltage signal of 0.4V ~ 2V through 100 Ohmages, through filtering circuit, AD7327 modulus conversion chip, with SPI serial bus data mode, after processing, the single-chip microcomputer signal connects liquid crystal display circuit again.
In technique scheme, the serial communication driving circuit of described failure diagnostic apparatus adopts serial port drive chip ADM3251E that the diagnostic message of failure diagnostic apparatus is transferred to computing machine through the RS232 serial ports, for computer stored and demonstration diagnostic procedure and diagnostic result.
The utility model can be for simulating radiation detector and failure diagnostic apparatus is examined mutually, and testing process can store and show on computers; The simulation radiation detector carries out fault diagnosis to the radiation monitoring system signal processing apparatus; Failure diagnostic apparatus carries out fault diagnosis to true radiation detector, but diagnostic procedure and diagnostic result Storage & Display are on computers.The utility model is simple in structure, is easy to carry, easy to use, can locate fast the fault origination point, improves diagnosis efficiency, reduces maintenance cost, has very high practical value and promotional value.
The accompanying drawing explanation
The circuit system structure block diagram that Fig. 1 is simulation radiation detector in the utility model.
The circuit system structure block diagram that Fig. 2 is failure diagnostic apparatus in the utility model.
The circuit connection diagram one that Fig. 3 is power-switching circuit in the utility model.
The circuit connection diagram two that Fig. 4 is power-switching circuit in the utility model.
The circuit connection diagram that Fig. 5 is analog quantity sample circuit in the utility model.
The circuit connection diagram that Fig. 6 is the pulse of the utility model mesohigh and low voltage pulse signal circuit for generating.
The circuit connection diagram that Fig. 7 is 4 ~ 20mA current occuring circuit in the utility model.
Fig. 8 is the circuit connection diagram that the utility model mesohigh produces circuit and high-voltage control circuit.
The circuit connection diagram that Fig. 9 is the pulse of the utility model mesohigh and low voltage pulse signal treatment circuit.
The circuit connection diagram that Figure 10 is 4 ~ 20mA current signal treatment circuit in the utility model.
The circuit connection diagram that Figure 11 is serial communication driving circuit in the utility model.
Figure 12 examines schematic diagram mutually for simulating radiation detector and failure diagnostic apparatus.
Figure 13 is that failure diagnostic apparatus detects the radiation detector schematic diagram.
Figure 14 detects radiation monitoring system signal processing apparatus schematic diagram for the simulation radiation detector.
Wherein: 1. simulation radiation detector, 2. failure diagnostic apparatus, 3. be equipped with the computing machine of failure diagnostic apparatus special software, 4. radiation detector, 5. radiation monitoring system signal processing apparatus.
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
The present embodiment provides a kind of nuclear radiation monitoring system fault diagnosis device, comprises simulation radiation detector and failure diagnostic apparatus.
Wherein, as shown in Figure 1, the simulation radiation detector comprises: power-switching circuit, for generation of ± 12V ,+5V ,+3.3V power supply; High-voltage pulse signal and low voltage pulse signal circuit for generating; 4 ~ 20mA current occuring circuit; The analog quantity sample circuit, for right ± 12V with variously put on positive and negative high-voltage value on radiation detector and the positive high voltage value of high-voltage pulse is sampled; Liquid crystal display drive circuit and key control circuit and SCM peripheral circuit etc.Described high-voltage pulse signal all is connected with single-chip microcomputer with low voltage pulse signal circuit for generating, 4 ~ 20mA current occuring circuit, analog quantity sample circuit, liquid crystal display drive circuit and key control circuit, and the output terminal of power-switching circuit provides operating voltage for each built-up circuit of simulation radiation detector.
As shown in Figure 2, failure diagnostic apparatus comprises: power-switching circuit, for generation of ± 12V ,+5V ,+3.3V power supply; Circuit for producing high voltage and high-voltage control circuit, can simulate the various high-voltage values that put on radiation detector, the high-voltage value that circuit for producing high voltage is fixing for generation of certain, when needs switching Radiation monitoring passage, high-pressure modular can be exported the required high-voltage value of this monitoring channel by high-voltage control circuit; The high pressure sample circuit, for being sampled to various positive high voltage value or the negative high voltage values that put on radiation detector; High-voltage pulse and low voltage pulse signal treatment circuit are analyzed and are processed for the high-voltage pulse signal to input and low voltage pulse signal; 4 ~ 20mA current signal treatment circuit carries out the signal processing for the electric current to input; Serial communication driving circuit with the computer communication that the failure diagnostic apparatus special software is housed; Liquid crystal display drive circuit and key control circuit and SCM peripheral circuit etc.Described high-voltage pulse all is connected with single-chip microcomputer with low voltage pulse signal treatment circuit, 4 ~ 20mA current signal treatment circuit, circuit for producing high voltage and high-voltage control circuit, high pressure sample circuit, serial communication driving circuit, liquid crystal display drive circuit and key control circuit, and the output terminal of power-switching circuit provides operating voltage for each built-up circuit of failure diagnostic apparatus.
[0035]in the above-described embodiments, the power-switching circuit of described simulation radiation detector and failure diagnostic apparatus is identical, as shown in Figure 3,4, all adopt battery-powered, the electric battery output terminal is through TEN8-2421WI chip output ± 12V, the electric battery output terminal is through TEN8-2411WI chip output+5V, and+5V is through SPX117-3.3 voltage stabilizing chip output+3.3V.
In the above-described embodiments, the high pressure sample circuit principle of the analog quantity sample circuit of described simulation radiation detector and failure diagnostic apparatus is basic identical, and difference is to simulate comprise ± 12V of analog quantity that radiation detector need to measure and the positive high voltage value of positive and negative high-voltage value and high-voltage pulse; The analog quantity that failure diagnostic apparatus need to be measured is positive and negative high-voltage value.As shown in Figure 5, the metering circuit of described ± 12V is+12V,-12V analog quantity is respectively through R1, R2 and R3, the bleeder circuit that R4 forms, obtain sampling voltage, through sampling hold circuit, be the in-phase input end input of sampling voltage from operational amplifier OP1A and OP1B respectively again, the inverting input of operational amplifier OP1A and OP1B and output terminal short circuit, the voltage of operational amplifier OP1A and OP1B output is input to respectively the analog input channel of AD7327 modulus conversion chip as sampled signal, the output terminal of AD7327 chip is HSSI High-Speed Serial Interface, with the SPI serial ports of single-chip microcomputer, be connected, after processing, single-chip microcomputer obtains the measured value of analog quantity.Just described, the metering circuit of the analog quantity of the positive high voltage value of negative high voltage value and high-voltage pulse, to make the positive high voltage value, the positive high voltage value of negative high voltage value and high-voltage pulse signal is passed through respectively R5, R6, RP1 and R7, R8, RP2 and R9, R10, the bleeder circuit that RP3 forms, obtain sampling voltage, the sampling high pressure is respectively through R11, R12, C19, C20 and R14, R15, C21, C22 and R17, R18, C23, the RC filtering circuit that C24 forms, its output is connected with sampling hold circuit, output respectively with operational amplifier OP3A, OP2A, the in-phase input end of OP2B is connected, operational amplifier OP3A, OP2A, the inverting input of OP2B and output terminal short circuit, operational amplifier OP3A, OP2A, the voltage of OP2B output is input to respectively the analog input channel of AD7327 chip as sampled signal, then with SPI serial bus data mode, sending into single-chip microcomputer is processed, obtain the measured value of analog quantity.Wherein, the effect of RP1, RP2, RP3 potentiometer is fine setting high pressure sampled value, and R5, R7, R9 are respectively the large resistance of 33M Ω.
In the above-described embodiments, as shown in Figure 6, high-voltage pulse and the low voltage pulse signal circuit for generating of simulation radiation detector, to utilize the PWM module of LPC1768 chip single-chip microcomputer to produce pulse signal, export low voltage pulse signal after pulse transformer isolation driving circuit is isolated, high-voltage pulse signal needs to pass through high pressure every directly again.
In the above-described embodiments, as shown in Figure 7,4 ~ 20mA current occuring circuit of simulation radiation detector, be to utilize LPC1768 chip single-chip microcomputer to produce set of number amount signal, through the AD420 analog-digital chip, converts one group of 4 ~ 20mA current signal output to.
In the above-described embodiments, as shown in Figure 8, the high pressure of failure diagnostic apparatus and control circuit thereof, comprise circuit for producing high voltage and high-voltage control circuit.The positive high voltage module that circuit for producing high voltage is+1400V ~ 0V by the High voltage output scope and High voltage output scope be 0V ~-the negative high voltage module of 1000V forms, high-voltage control circuit is to utilize the SPI serial bus of single-chip microcomputer to send the high voltage control instruction, the DAC chip that SPI serial bus data are AD5724 through model converts a high voltage control signal to, output to positive and negative high-pressure modular, with positive and negative high-pressure modular, form the high pressure conditioned circuit.
In the above-described embodiments, as shown in Figure 9, the high-voltage pulse of described failure diagnostic apparatus and low voltage pulse signal treatment circuit are divided into high-voltage pulse treatment circuit and low voltage pulse signal treatment circuit, the input termination high-voltage pulse input signal of high-voltage pulse signal treatment circuit, the high-voltage pulse input signal enters the inverting input of the operational amplifier that model is LM111 after straight through high pressure, the in-phase input end of operational amplifier fetches the threshold voltage 1 from the output terminal of AD5724 analog-digital chip, the signal of the output terminal of operational amplifier is high-voltage pulse counting rate cps, high-voltage pulse counting rate cps signal directly connects the timer module of LPC1768 chip single-chip microcomputer and carries out the software processing, the software result through liquid crystal display circuit in liquid crystal screen display pulse signal result, the input termination action of low-voltage pulse input signal of low voltage pulse signal treatment circuit, the action of low-voltage pulse input signal enters the inverting input of the operational amplifier that model is LM111, the in-phase input end of operational amplifier fetches the threshold voltage 2 from the output terminal of AD5724 chip, the signal of the output terminal of operational amplifier is action of low-voltage pulse counting rate cps, action of low-voltage pulse counting rate cps signal directly connects the timer module of LPC1768 chip single-chip microcomputer and carries out the software processing, the software result through liquid crystal display circuit in liquid crystal screen display pulse signal result, described threshold voltage 1 and threshold voltage 2, respectively by the software setting of single-chip microcomputer, export the serial ports input pin of AD5724 analog-digital chip to through the SPI serial bus, then export via the output pin of AD5724 analog-digital chip.
In the above-described embodiments, as shown in figure 10,4 ~ 20mA current signal treatment circuit of failure diagnostic apparatus, the resistance that is 100 ohm by 4 ~ 20mA current signal by a size, be converted to the voltage signal of 0.4V ~ 2V, then circuit and AD7327 modulus conversion chip after filtering, with SPI serial bus data mode current detecting result at certain passage of liquid crystal screen display after the single-chip microcomputer signal is processed.
In the above-described embodiments, as shown in figure 11, the serial communication driving circuit of failure diagnostic apparatus, to adopt serial port drive chip ADM3251E the diagnostic message of failure diagnostic apparatus to be transferred to the computing machine that the failure diagnostic apparatus special software is housed through the RS232 serial ports, for computer stored and demonstration diagnostic procedure and diagnostic result.
Nuclear radiation monitoring system fault diagnosis device of the present invention can for simulate radiation detector and failure diagnostic apparatus examine mutually, simulate radiation detector to the radiation monitoring system signal processing apparatus carry out fault diagnosis, failure diagnostic apparatus carries out fault diagnosis to true radiation detector, but diagnostic procedure and diagnostic result Storage & Display are on computers.
The method of application apparatus of the present invention investigation fault is as follows:
1, as shown in figure 12, simulation radiation detector 1 docks with failure diagnostic apparatus 2, carries out function and examines mutually, if two instrumentations are normal, can carry out the malfunction elimination work of radiation monitoring system.
2, as shown in figure 13, failure diagnostic apparatus 2 docks (according to the interface connector type selecting of detector suitable connector adapter) with true radiation detector 4, failure diagnostic apparatus is connected with the computing machine 3 that the failure diagnostic apparatus special software is housed by the RS232 serial ports.Open failure diagnostic apparatus, select the passage consistent with true radiation detector type, inspections and examinations process and diagnostic result on failure diagnostic apparatus and on computer screen, if diagnostic result shows normal, illustrate that the radiation detector end is working properly, so very possible fault appears at the signal processing apparatus end; If it is undesired that diagnostic result shows, is likely that radiation detector brings out existing fault.
3, as shown in figure 14, simulation radiation detector 1 docks with radiation monitoring system signal processing apparatus 5, if signal processing apparatus work is undesired, changes cable, then docks, if signal processing apparatus is working properly, illustrates that stube cable has problem; If signal processing apparatus work is still undesired, illustrate that signal processing apparatus breaks down.
Two instrument in the utility model simulate radiation detector and failure diagnostic apparatus can be contained in respectively in the airtight Aluminum Alloy Chassis that volume is 170 * 105 * 75mm, 215 * 125 * 60mm, power supply adopts 12 joint AA Ni-MH rechargeable batteries, continuous working can reach more than 6 hours, was a kind of portable apparatus.
In sum, simulation radiation detector in the utility model can be designed to the Portable signal generator of multimeter size, can simulate characteristic pulse signal or the characteristic current signal of all radiation detectors, and ± the 12V power supply signal, can replace true radiation detector and nuclear radiation monitoring system signal treating apparatus to achieve a butt joint, also can dock with failure diagnostic apparatus; Failure diagnostic apparatus can be designed to the portable apparatus that size is close with the simulation radiation detector, can simulate the signal input and output feature of all nuclear radiation monitoring system signal treating apparatus, can dock with the simulation radiation detector, also can replace the signal processing apparatus of true nuclear radiation monitoring system, with true radiation detector, comprise that the radiation detector of the types such as ionization chamber type, helium 3 casts, G-M cast, flicker build achieves a butt joint.Its diagnostic procedure and diagnostic result can be by the demonstration of failure diagnostic apparatus special software on computers, and diagnostic data can be stored on computers.
The utility model includes but not limited to above embodiment, and every any being equal to of carrying out under spirit of the present utility model and principle replaces or local improvement, all will be considered as within protection domain of the present utility model.
Claims (9)
1. a nuclear radiation monitoring system fault diagnosis device, comprise simulation radiation detector and failure diagnostic apparatus, it is characterized in that: described simulation radiation detector is by single-chip microcomputer, power-switching circuit, high-voltage pulse and low voltage pulse signal circuit for generating, 4 ~ 20mA current occuring circuit, the analog quantity sample circuit, liquid crystal display drive circuit, key control circuit and SCM peripheral the electric circuit constitute, described high-voltage pulse and low voltage pulse signal circuit for generating, 4 ~ 20mA current occuring circuit, the analog quantity sample circuit, liquid crystal display drive circuit all is connected with single-chip microcomputer with key control circuit, the output terminal of power-switching circuit provides operating voltage for each built-up circuit of simulation radiation detector, described failure diagnostic apparatus is by single-chip microcomputer, power-switching circuit, circuit for producing high voltage, high-voltage control circuit, the high pressure sample circuit, high-voltage pulse and low voltage pulse signal treatment circuit, 4 ~ 20mA current signal treatment circuit, the serial communication driving circuit, liquid crystal display drive circuit, key control circuit and SCM peripheral the electric circuit constitute, described high-voltage pulse and low voltage pulse signal treatment circuit, 4 ~ 20mA current signal treatment circuit, circuit for producing high voltage, high-voltage control circuit, the high pressure sample circuit, the serial communication driving circuit, liquid crystal display drive circuit all is connected with single-chip microcomputer with key control circuit, the output terminal of power-switching circuit provides operating voltage for each built-up circuit of failure diagnostic apparatus.
2. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: the power-switching circuit of described simulation radiation detector and failure diagnostic apparatus is identical, all adopt battery-powered, the electric battery output terminal is through TEN8-2421WI chip output ± 12V, the electric battery output terminal is through TEN8-2411WI chip output+5V, and+5V is through SPX117-3.3 voltage stabilizing chip output+3.3V.
3. nuclear radiation monitoring system fault diagnosis device according to claim 1 is characterized in that: the comprise+12V of analog quantity sample circuit of described simulation radiation detector ,-metering circuit of the positive high voltage value of 12V, positive high voltage value, negative high voltage value and high-voltage pulse; The high pressure sample circuit of failure diagnostic apparatus comprises the metering circuit of positive high voltage value, negative high voltage value; Described+12V ,-metering circuit of 12V is+12V ,-the 12V analog quantity is respectively through bleeder circuit output sampling voltage, again through sampling hold circuit output voltage sampled signal, voltage sampling signal is input to respectively the analog input channel of AD7327 modulus conversion chip, the AD7327 modulus conversion chip is output as HSSI High-Speed Serial Interface, with the SPI serial ports of single-chip microcomputer, is connected; The positive high voltage analog quantity that the metering circuit of the positive high voltage value of described positive high voltage value, negative high voltage value and high-voltage pulse is positive high voltage, negative high voltage and high-voltage pulse is respectively through bleeder circuit output sampling voltage, output voltage sampled signal after RC filtering circuit and sampling hold circuit again, voltage sampling signal is input to respectively the analog input channel of AD7327 modulus conversion chip, the AD7327 modulus conversion chip is output as HSSI High-Speed Serial Interface, with the SPI serial ports of single-chip microcomputer, is connected.
4. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: the PWM module that the high-voltage pulse of described simulation radiation detector and low voltage pulse signal circuit for generating are LPC1768 chip single-chip microcomputer produces pulse signal, export low voltage pulse signal after the isolation of pulse transformer isolation driving circuit, through the isolation of pulse transformer isolation driving circuit, export high-voltage pulse signal through high pressure after straight again.
5. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: 4 ~ 20mA current occuring circuit of described simulation radiation detector is LPC1768 chip single-chip microcomputer output set of number amount signal, and the analog-digital chip that this digital quantity signal is AD420 through model converts the output of 4 ~ 20mA current signal to.
6. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: the positive high voltage module that the circuit for producing high voltage of described failure diagnostic apparatus is+1400V ~ 0V by output area and output area be 0V ~-the negative high voltage module of 1000V forms, the SPI serial bus output high voltage control instruction that high-voltage control circuit is single-chip microcomputer, SPI serial bus data convert high voltage control signal to through the AD5724 analog-digital chip and output to positive and negative high-pressure modular, with positive and negative high-pressure modular, form the high pressure conditioned circuit.
7. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: the high-voltage pulse of described failure diagnostic apparatus and low voltage pulse signal treatment circuit comprise high-voltage pulse signal treatment circuit and low voltage pulse signal treatment circuit, the input termination high-voltage pulse input signal of high-voltage pulse signal treatment circuit, the high-voltage pulse input signal carries out high pressure every directly through capacitance, the pulse signal obtained is through relatively amplifying circuit and first threshold voltage compare, comparer output high-voltage pulse counting rate signal, high-voltage pulse counting rate signal connects the timer module of LPC1768 chip single-chip microcomputer, the input termination action of low-voltage pulse input signal of low voltage pulse signal treatment circuit, the action of low-voltage pulse input signal is through comparing amplifying circuit and Second Threshold voltage ratio, comparer output obtains action of low-voltage pulse counting rate signal, action of low-voltage pulse counting rate signal connects the timer module of LPC1768 chip single-chip microcomputer, described first threshold voltage and Second Threshold voltage, respectively by the software setting of single-chip microcomputer, export the serial ports input pin of AD5724 analog-digital chip to through the SPI serial bus, then export via the output pin of AD5724 analog-digital chip.
8. nuclear radiation monitoring system fault diagnosis device according to claim 1, it is characterized in that: input termination 4 ~ 20mA current signal of 4 ~ 20mA current signal treatment circuit of described failure diagnostic apparatus, 4 ~ 20mA current signal is converted to the voltage signal of 0.4V ~ 2V through 100 Ohmages, then exports single-chip microcomputer to SPI serial bus data mode after filtering circuit, AD7327 modulus conversion chip.
9. nuclear radiation monitoring system fault diagnosis device according to claim 1, is characterized in that: the serial communication driving circuit employing serial port drive chip ADM3251E of described failure diagnostic apparatus.
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| CN 201320379612 CN203350455U (en) | 2013-06-28 | 2013-06-28 | Nuclear radiation monitoring system fault diagnostic device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336209A (en) * | 2013-06-28 | 2013-10-02 | 中国人民解放军海军潜艇学院 | Fault diagnosis device for nuclear radiation monitoring system |
| CN103983881A (en) * | 2014-06-06 | 2014-08-13 | 南华大学 | Fault diagnosis method and device for nuclear detector |
| CN104062673A (en) * | 2014-06-20 | 2014-09-24 | 成都理工大学 | Nuclear analyzer self-diagnosis system |
| CN106646072A (en) * | 2017-02-27 | 2017-05-10 | 中国人民解放军火箭军工程大学 | Method for efficiently detecting faults of high-voltage drive units in wide-range radiation detection devices |
| CN108333986A (en) * | 2018-01-26 | 2018-07-27 | 成都理工大学 | A kind of nuclear instrument power supply experiment porch of Multifunctional low-noise |
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2013
- 2013-06-28 CN CN 201320379612 patent/CN203350455U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336209A (en) * | 2013-06-28 | 2013-10-02 | 中国人民解放军海军潜艇学院 | Fault diagnosis device for nuclear radiation monitoring system |
| CN103336209B (en) * | 2013-06-28 | 2015-07-08 | 中国人民解放军海军潜艇学院 | Fault diagnosis device for nuclear radiation monitoring system |
| CN103983881A (en) * | 2014-06-06 | 2014-08-13 | 南华大学 | Fault diagnosis method and device for nuclear detector |
| CN103983881B (en) * | 2014-06-06 | 2016-11-23 | 南华大学 | The method for diagnosing faults of nuclear detector and device |
| CN104062673A (en) * | 2014-06-20 | 2014-09-24 | 成都理工大学 | Nuclear analyzer self-diagnosis system |
| CN106646072A (en) * | 2017-02-27 | 2017-05-10 | 中国人民解放军火箭军工程大学 | Method for efficiently detecting faults of high-voltage drive units in wide-range radiation detection devices |
| CN106646072B (en) * | 2017-02-27 | 2019-11-01 | 中国人民解放军火箭军工程大学 | A kind of wide range radiation detection device mesohigh driving unit failure efficient detection method |
| CN108333986A (en) * | 2018-01-26 | 2018-07-27 | 成都理工大学 | A kind of nuclear instrument power supply experiment porch of Multifunctional low-noise |
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