CN104409120A - Switching method for current linear amplification automatic range - Google Patents
Switching method for current linear amplification automatic range Download PDFInfo
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- CN104409120A CN104409120A CN201410754123.4A CN201410754123A CN104409120A CN 104409120 A CN104409120 A CN 104409120A CN 201410754123 A CN201410754123 A CN 201410754123A CN 104409120 A CN104409120 A CN 104409120A
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- current amplifier
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
- G21C17/104—Measuring reactivity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
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Abstract
The invention discloses a switching method for current linear amplification automatic range. The switching method is applied to digital reactivity instruments measuring reactivity of nuclear reactors, and comprises the following steps: acquiring a reactor capability signal through measurement by an ionization chamber detector, conducting linear amplification on the reactor capability signal by utilizing a current amplifier, and conducting AD collection on the amplified signal for reactivity calculation, wherein the measuring range of the current amplifier is switched by adopting an automatic manner. The switching method realizes the technical effects that automatic switching of the current linear amplification range is realized; the switching efficiency is high; the switching steps are simple; operation simplicity is improved; requirements to equipment operating staff are reduced; measuring accuracy of reactivity is not easy to be influenced; measurement responding time is short; measuring accuracy is ensured.
Description
Technical field
Nuclear reactor measuring study field of the present invention, particularly relates to a kind of for electric current Linear Amplifer automatic range changing method.
Background technology
Reactivity meter is the equipment for directly measuring pile reactivity, is the key equipment that reactor physics starts.Its principle of work as shown in Figure 1.
The heap power signal (micro-current signal) that reactivity meter is obtained by ionization chamber detector measurement, after Linear Amplifer, is transformed by AD and could be used for reactive calculating.Therefore electric current Linear magnifying technology in high is one of core technology of DIGITAL REACTIVITY METER.At present, domestic by Chinese Nuclear Power Design Academy application patent---can be used for the reactivity meter of the critical supervision of reactor and Critical lattice, current linear amplifier devises six range shelves, and switching mode is manual mode.
There is following limitation in manual switchover mode:
Before each measurement reactivity, user must set the suitable range ability needed for test in advance.If choose improper, then there is the problem measuring outrange, thus affect reactive measuring accuracy.Therefore, just stricter to user of service's requirement.
Reactivity meter measures the interruption of manual switchover meeting initiation reaction normal measurement process, equipment must follow the tracks of reactivity again, reactive tracking needs to expend the regular hour, therefore manual switchover method exists measures the response time by the defect artificially extended, and also measuring accuracy can be brought to lose to whole test to a certain extent simultaneously.
In sum, present inventor, in the process realizing invention technical scheme in the embodiment of the present application, finds that above-mentioned technology at least exists following technical matters:
In the prior art, because existing reactivity meter is when carrying out survey calculation, the range of current linear amplifier needs to carry out manual switchover, and need the suitable range ability set in advance needed for test, if choose improper, then there is the problem measuring outrange, thus affect reactive measuring accuracy, and reactivity meter measures the interruption of manual switchover meeting initiation reaction normal measurement process, equipment must follow the tracks of reactivity again, reactive tracking needs to expend the regular hour, therefore manual switchover method exists measures the response time by the defect artificially extended, also measuring accuracy can be brought to lose to whole test to a certain extent simultaneously, so, of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose.
Summary of the invention
The invention provides a kind of for electric current Linear Amplifer automatic range changing method, solve of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose, achieve the automatic switchover of the linear amplification range of electric current, switching efficiency is high, switch step is simple, improve the simplicity of operation, reduce the requirement to equipment operator, and be not easy to affect reactive measuring accuracy, measure the response time short technique effect ensureing measuring accuracy.
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of for electric current Linear Amplifer automatic range changing method, and application is with the reactive DIGITAL REACTIVITY METER of measurement nuclear reactor, and described method comprises:
First, reactor capability signal is obtained by ionization chamber detector measurement;
Then, current amplifier is utilized to carry out Linear Amplifer to described reactor capability signal;
Finally, AD collection is carried out to the signal after amplifying, calculates for reactivity;
Wherein, the range of described current amplifier adopts automatic mode to switch.
Further, the range of described current amplifier adopts automatic mode to carry out switching to be specially: in described current amplifier, add electric current Linear Amplifer automatic range commutation circuit to realize the automatic range switching of described current amplifier.
Further, described electric current Linear Amplifer automatic range commutation circuit carrys out the break-make of feedback control circuit to realize the automatic switchover of range especially by electronic switch.
Further, the automatic switchover that the described break-make carrying out feedback control circuit by electronic switch realizes range is specially: described electric current Linear Amplifer automatic range commutation circuit comprises: the first electronic switch, second electronic switch, 3rd electronic switch, 4th electronic switch, 5th electronic switch, 6th electronic switch, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and electric capacity, wherein, input end and the output terminal of described current amplifier is connected in parallel on after described first electronic switch and described first resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described second electronic switch and described second resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 3rd electronic switch and described 3rd resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 4th electronic switch and described 4th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 5th electronic switch and described 5th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 6th electronic switch and described 6th resistant series, input end and the output terminal of described electric capacity and described current amplifier are in parallel.
Further, described electronic switch adopts 3DO6 field effect transistor.
Further, described electric current Linear Amplifer automatic range commutation circuit have employed ground resist technology to suppress the leakage current of described electronic switch.
Further, described ground resist technology: be by the electronic switch of same model, the output terminal of the electronic switch of first to the 6th is connected on signal ground.
Further, the automatic range switching flow process of described current amplifier specifically comprises:
The Output rusults of described current amplifier is judged;
If described Output rusults is greater than the switching upper limit, be then switched to top grade, and time delay continues the Output rusults judging described current amplifier after waiting for a preset time period;
If described Output rusults is less than or equal to the switching upper limit, then judge whether described Output rusults is less than switching lower limit;
If described Output rusults is less than switching lower limit, be then switched to low grade, and time delay continues the Output rusults judging described current amplifier after waiting for described preset time period;
If described Output rusults is more than or equal to switching lower limit, then continue the Output rusults judging described current amplifier after directly described preset time period is waited in time delay.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
First reactor capability signal is obtained by ionization chamber detector measurement owing to have employed, then current amplifier is utilized to carry out Linear Amplifer to described reactor capability signal, finally AD collection is carried out to the signal after amplification, for the technical scheme that reactivity calculates, wherein, the range of described current amplifier adopts automatic mode to switch, namely the method that automatic range scope switches is adopted, no longer need the prior setting measurement range ability of user, overcome the limitation of manual switchover mode, improve the response time of equipment, greatly improve the simplicity of operation, high degree reduces the requirement to equipment operator simultaneously, because range is very short for switching time, the quick tracking of this automatic switching range method realization response before and after gearshift, measuring accuracy can not be affected, so, efficiently solve of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose, and then achieve the automatic switchover of the linear amplification range of electric current, switching efficiency is high, switch step is simple, improve the simplicity of operation, reduce the requirement to equipment operator, and be not easy to affect reactive measuring accuracy, measure the response time short technique effect ensureing measuring accuracy.
Accompanying drawing explanation
Fig. 1 is reactivity meter schematic diagram in the embodiment of the present application one;
Fig. 2 is the process flow diagram of automatic range changing method in the embodiment of the present application one;
Fig. 3 is the automatic range switching schematic flow sheet of current amplifier in the embodiment of the present application one;
Fig. 4 is electric current Linear Amplifer automatic range commutation circuit figure in the embodiment of the present application one.
Embodiment
The invention provides a kind of for electric current Linear Amplifer automatic range changing method, solve of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose, achieve the automatic switchover of the linear amplification range of electric current, switching efficiency is high, switch step is simple, improve the simplicity of operation, reduce the requirement to equipment operator, and be not easy to affect reactive measuring accuracy, measure the response time short technique effect ensureing measuring accuracy.
Technical scheme during the application implements is for solving the problems of the technologies described above.General thought is as follows:
Have employed and first obtain reactor capability signal by ionization chamber detector measurement, then current amplifier is utilized to carry out Linear Amplifer to described reactor capability signal, finally AD collection is carried out to the signal after amplification, for the technical scheme that reactivity calculates, wherein, the range of described current amplifier adopts automatic mode to switch, namely the method that automatic range scope switches is adopted, no longer need the prior setting measurement range ability of user, overcome the limitation of manual switchover mode, improve the response time of equipment, greatly improve the simplicity of operation, high degree reduces the requirement to equipment operator simultaneously, because range is very short for switching time, the quick tracking of this automatic switching range method realization response before and after gearshift, measuring accuracy can not be affected, so, efficiently solve of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose, and then achieve the automatic switchover of the linear amplification range of electric current, switching efficiency is high, switch step is simple, improve the simplicity of operation, reduce the requirement to equipment operator, and be not easy to affect reactive measuring accuracy, measure the response time short technique effect ensureing measuring accuracy.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
Embodiment one:
In embodiment one, provide a kind of for electric current Linear Amplifer automatic range changing method, application is with the reactive DIGITAL REACTIVITY METER of measurement nuclear reactor, and please refer to Fig. 1-Fig. 4, described method comprises:
S10, obtains reactor capability signal by ionization chamber detector measurement;
S20, utilizes current amplifier to carry out Linear Amplifer to described reactor capability signal;
S30, carries out AD collection to the signal after amplifying, calculates for reactivity;
Wherein, the range of described current amplifier adopts automatic mode to switch.
Wherein, in the embodiment of the present application, the range of described current amplifier adopts automatic mode to carry out switching to be specially: in described current amplifier, add electric current Linear Amplifer automatic range commutation circuit to realize the automatic range switching of described current amplifier.
Wherein, in the embodiment of the present application, described electric current Linear Amplifer automatic range commutation circuit carrys out the break-make of feedback control circuit to realize the automatic switchover of range especially by electronic switch.
Further, the automatic switchover that the described break-make carrying out feedback control circuit by electronic switch realizes range is specially: described electric current Linear Amplifer automatic range commutation circuit comprises: the first electronic switch, second electronic switch, 3rd electronic switch, 4th electronic switch, 5th electronic switch, 6th electronic switch, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and electric capacity, wherein, input end and the output terminal of described current amplifier is connected in parallel on after described first electronic switch and described first resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described second electronic switch and described second resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 3rd electronic switch and described 3rd resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 4th electronic switch and described 4th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 5th electronic switch and described 5th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 6th electronic switch and described 6th resistant series, input end and the output terminal of described electric capacity and described current amplifier are in parallel.
Wherein, in the embodiment of the present application, described electric current Linear Amplifer automatic range commutation circuit have employed ground resist technology to suppress the leakage current of described electronic switch.
Wherein, in the embodiment of the present application, the automatic range switching flow process of described current amplifier specifically comprises:
The Output rusults of described current amplifier is judged;
If described Output rusults is greater than the switching upper limit, be then switched to top grade, and time delay continues the Output rusults judging described current amplifier after waiting for a preset time period;
If described Output rusults is less than or equal to the switching upper limit, then judge whether described Output rusults is less than switching lower limit;
If described Output rusults is less than switching lower limit, be then switched to low grade, and time delay continues the Output rusults judging described current amplifier after waiting for described preset time period;
If described Output rusults is more than or equal to switching lower limit, then continue the Output rusults judging described current amplifier after directly described preset time period is waited in time delay.
Wherein, the schematic diagram of the hardware circuit of electric current Linear Amplifer automatic range switching in actual applications as shown in Figure 4.Amplifier is divided into 10-10A ~ 10-9A, 10-10A ~ 10-8A, 10-9 ~ 10-7A, 10-8 ~ 10-6A, 10-7 ~ 10-5A, 10-6A ~ 10-4A, totally 6 range abilities.Carried out the break-make of feedback control circuit by electronic switch, and then realize automatic range switching.
Physical circuit is: have 6 electronic switches and 6 resistance, be respectively: the first electronic switch, second electronic switch, 3rd electronic switch, 4th electronic switch, 5th electronic switch, 6th electronic switch, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance and electric capacity, wherein, input end and the output terminal of described current amplifier is connected in parallel on after described first electronic switch and described first resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described second electronic switch and described second resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 3rd electronic switch and described 3rd resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 4th electronic switch and described 4th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 5th electronic switch and described 5th resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 6th electronic switch and described 6th resistant series, input end and the output terminal of described electric capacity and described current amplifier are in parallel.Wherein, described electronic switch is connected to a control end.
Wherein, in actual applications, the selection of electronic switch is very important for the scheme in the embodiment of the present application.Scheme in application embodiment is tested by choosing multiple electronic switch, contrasts the performance that it amplifies, have finally chosen reliable stable electronic switch, and 3DO6 field effect transistor selected by electronic switch by experiment.
Wherein, have employed electronic switch leakage current treatment technology---ground is protected.Although have chosen suitable electronic switch, because electronic switch exists leakage current when disconnecting, thus cause amplifying the larger error of result existence.Conceptual design in application embodiment a kind of " protect " technology to suppress electronic switch leakage current, thus ensure that its amplification performance.Described ground resist technology: be by the electronic switch of same model, the output terminal of the electronic switch of first to the 6th is connected on signal ground.Described electronic switch is connected to a control end.
Wherein, in actual applications, the flow process that automatic range switches is devised in the embodiment of the present application, as shown in Figure 4.First, according to the Output rusults of amplifier, judge switching mode, and switched rear needs at every turn and to wait for a period of time on carrying out once range switching judging.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
First reactor capability signal is obtained by ionization chamber detector measurement owing to have employed, then current amplifier is utilized to carry out Linear Amplifer to described reactor capability signal, finally AD collection is carried out to the signal after amplification, for the technical scheme that reactivity calculates, wherein, the range of described current amplifier adopts automatic mode to switch, namely the method that automatic range scope switches is adopted, no longer need the prior setting measurement range ability of user, overcome the limitation of manual switchover mode, improve the response time of equipment, greatly improve the simplicity of operation, high degree reduces the requirement to equipment operator simultaneously, because range is very short for switching time, the quick tracking of this automatic switching range method realization response before and after gearshift, measuring accuracy can not be affected, so, efficiently solve of the prior art exist for the linear amplification range changing method of electric current need manually to switch, cause switching efficiency lower and easily affect reactive measuring accuracy, the measurement response time is extended the technical matters bringing measuring accuracy to lose, and then achieve the automatic switchover of the linear amplification range of electric current, switching efficiency is high, switch step is simple, improve the simplicity of operation, reduce the requirement to equipment operator, and be not easy to affect reactive measuring accuracy, measure the response time short technique effect ensureing measuring accuracy.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1., for an electric current Linear Amplifer automatic range changing method, application is with the reactive DIGITAL REACTIVITY METER of measurement nuclear reactor, and it is characterized in that, described method comprises:
Reactor capability signal is obtained by ionization chamber detector measurement;
Current amplifier is utilized to carry out Linear Amplifer to described reactor capability signal;
AD collection is carried out to the signal after amplifying, calculates for reactivity;
Wherein, the range of described current amplifier adopts automatic mode to switch.
2. method according to claim 1, it is characterized in that, the range of described current amplifier adopts automatic mode to carry out switching and is specially: in described current amplifier, add electric current Linear Amplifer automatic range commutation circuit to realize the automatic range switching of described current amplifier.
3. method according to claim 2, is characterized in that, described electric current Linear Amplifer automatic range commutation circuit carrys out the break-make of feedback control circuit to realize the automatic switchover of range especially by electronic switch.
4. method according to claim 3, it is characterized in that, the automatic switchover that the described break-make carrying out feedback control circuit by electronic switch realizes range is specially: described electric current Linear Amplifer automatic range commutation circuit comprises: the first electronic switch, second electronic switch, 3rd electronic switch, 4th electronic switch, first resistance, second resistance, 3rd resistance, 4th resistance, electric capacity, wherein, input end and the output terminal of described current amplifier is connected in parallel on after described first electronic switch and described first resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described second electronic switch and described second resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 3rd electronic switch and described 3rd resistant series, input end and the output terminal of described current amplifier is connected in parallel on after described 4th electronic switch and described 4th resistant series, described electric capacity is in parallel with described current amplifier.
5. method according to claim 3, is characterized in that, described electric current Linear Amplifer automatic range commutation circuit have employed ground resist technology to suppress the leakage current of described electronic switch.
6. method according to claim 2, is characterized in that, the automatic range switching flow process of described current amplifier specifically comprises:
The Output rusults of described current amplifier is judged;
If described Output rusults is greater than the switching upper limit, be then switched to top grade, and time delay continues the Output rusults judging described current amplifier after waiting for a preset time period;
If described Output rusults is less than or equal to the switching upper limit, then judge whether described Output rusults is less than switching lower limit;
If described Output rusults is less than switching lower limit, be then switched to low grade, and time delay continues the Output rusults judging described current amplifier after waiting for described preset time period;
If described Output rusults is more than or equal to switching lower limit, then continue the Output rusults judging described current amplifier after directly described preset time period is waited in time delay.
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| CN201410754123.4A CN104409120A (en) | 2014-12-11 | 2014-12-11 | Switching method for current linear amplification automatic range |
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| CN201410754123.4A CN104409120A (en) | 2014-12-11 | 2014-12-11 | Switching method for current linear amplification automatic range |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107785085A (en) * | 2017-10-23 | 2018-03-09 | 中国核动力研究设计院 | A kind of impulse waveform measurement apparatus with network communications capability |
| CN112687411A (en) * | 2020-12-24 | 2021-04-20 | 中国核动力研究设计院 | Reactivity measurement method based on multi-detector relay signals |
| CN112782635A (en) * | 2021-01-07 | 2021-05-11 | 广东省肇庆市质量计量监督检测所 | Winding wire breakdown voltage tester calibrating device |
| CN113066594A (en) * | 2021-03-23 | 2021-07-02 | 中国原子能科学研究院 | Power current range switching method and device of reactivity meter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785085A (en) * | 2017-10-23 | 2018-03-09 | 中国核动力研究设计院 | A kind of impulse waveform measurement apparatus with network communications capability |
| CN112687411A (en) * | 2020-12-24 | 2021-04-20 | 中国核动力研究设计院 | Reactivity measurement method based on multi-detector relay signals |
| CN112782635A (en) * | 2021-01-07 | 2021-05-11 | 广东省肇庆市质量计量监督检测所 | Winding wire breakdown voltage tester calibrating device |
| CN113066594A (en) * | 2021-03-23 | 2021-07-02 | 中国原子能科学研究院 | Power current range switching method and device of reactivity meter |
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Application publication date: 20150311 |