CN102916689A - Digital value acquisition circuit with fault diagnosis capacity - Google Patents
Digital value acquisition circuit with fault diagnosis capacity Download PDFInfo
- Publication number
- CN102916689A CN102916689A CN2012104510714A CN201210451071A CN102916689A CN 102916689 A CN102916689 A CN 102916689A CN 2012104510714 A CN2012104510714 A CN 2012104510714A CN 201210451071 A CN201210451071 A CN 201210451071A CN 102916689 A CN102916689 A CN 102916689A
- Authority
- CN
- China
- Prior art keywords
- acquisition circuit
- optocoupler
- signal
- signal acquisition
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electronic Switches (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention discloses a digital value acquisition circuit with fault diagnosis capacity. The digital value acquisition circuit comprises a contact type switch for information to be acquired and a fault judgment system for judging whether an acquisition process is abnormal or not according to output results of the two signal acquisition circuits, wherein the contact type switch is connected with a signal acquisition circuit A and a signal acquisition circuit B. The two acquisition circuits simultaneously execute signal acquisition on the same object; and whether the current sampling circuit has a fault or not is judged according to a result whether the two paths of acquired signals are the same or different is judged, so that a prevention measure can be made in advance, and the aim of improving the self-diagnosis coverage rate is fulfilled. The digital value acquisition circuit can acquire normal signals; and furthermore, hardware is subjected to random failure, the acquisition circuit can intelligently output a corresponding fault state, so that a fault diagnosis effect and a guide security treatment can be achieved, and the completeness of a system security function can be guaranteed.
Description
Technical field
The present invention relates to a kind of signal acquisition circuit, be specifically related to a kind of can identification by the digital quantity acquiring circuit of collecting device signal fault.
Background technology
In industrial control system (such as DCS or PLC), the startup of equipment at different levels, stop, process control, physical quantity threshold conditon, the state of the switching signals such as fault alarm has material impact to the operation of whole system with safety, and these collections of installing the switching value signals are also seemed particularly important with record.Therefore, usually need a kind of switching value data acquisition card of design, come these signals are gathered and report, so that master control system can be made corresponding control protection output according to the signal condition that collects, so that whole DCS system is in a safe condition.Safety isolation based on on-the-spot switching value signal and DCS control system has reached the necessity of signals collecting level conversion etc., and the modal digital quantity acquiring circuit of industry typically uses the collection of optocoupler or relay class device realization switch amount signal at present.As shown in Figure 1, the basic principle that the use optocoupler carries out the switching signal collection is as follows, and its collection to switch state signal is by applying inquiry power supply (V
The inquiry power supply) realize, optocoupler prime diode current flow during switch closure, operation principle according to optocoupler, optocoupler rear class triode output circuit will be also can conducting, thereby collect low level signal, otherwise the disconnection of switch then can be so that the not conducting of optocoupler rear class triode output circuit then collects high level signal.
But above-mentioned digital quantity acquiring circuit is because the inevitably safety function forfeiture that causes of hardware random failure, such as the inquiry power supply current-limiting circuit open circuit that lost efficacy, and the perhaps situation such as optocoupler front end diode fails open circuit.The existence of these problems is used for common process industrial; substantially can satisfy design function; but use for the nuclear power control protection system with high reliability and high security requirement; because high reliability and security requirement is arranged; whole system must use perfect self diagnosis measure to guarantee reaching of system safety index; in case hardware failure appears in general digital quantity acquiring circuit subblock; the DCS system can't obtain on-the-spot switch acquisition state; i.e. forfeiture control protection system function, this will be unacceptable for nuclear power station control protection system.
Summary of the invention
Can not realize the problem of failure diagnosis for solving digital quantity acquiring circuit in the prior art, the invention provides and a kind ofly namely can carry out the circuit that failure diagnosis can realize again digital data acquisition to Acquisition Circuit.Concrete scheme is as follows: a kind of digital quantity acquiring circuit with trouble diagnosibility, the contact type switch that comprises information to be collected, it is characterized in that, described contact type switch is connected with signal acquisition circuit A and signal acquisition circuit B, and judges according to two bars Acquisition Circuit Output rusults whether unusual fault is judged system to gatherer process.
Preferred version is: described signal acquisition circuit A and signal acquisition circuit B are respectively the optocoupler signal acquisition circuit, wherein the diode D3 backward end in the optocoupler A among the signal acquisition circuit A is connected with the contact type switch by protection diode D1, resistance R 2, the forward end of diode D3 is connected with 24V inquiry supply voltage by resistance R 1, the collector electrode of triode Q1 is exported collection signal DI1_A and is connected the grounded emitter of triode Q1 with fault judgement system in the optocoupler A; The forward end of diode D4 in the optocoupler B among the signal acquisition circuit B is connected with supply voltage by voltage stabilizing didoe D2, resistance R 1, the backward end of diode D4 is connected with contact switch by capacitor C 1, resistance R 2, the collector electrode of triode Q2 is exported collection signal DI1_B and is connected the grounded emitter of triode Q2 with fault judgement system among the optocoupler B.
Preferred version is: the collector electrode of the triode Q2 that triode Q1 be connected with optocoupler B in the described optocoupler A is connected with resistance R by resistance R 3 respectively and is identified voltage and be connected.
For realizing that the oneself detects: described fault judges that system is judged to be malfunction when the signal of DI1_A and DI1_B output is identical, and DI1_A and DI1_B output signal are judged to be normal condition when opposite each other.
The present invention utilizes the two-way Acquisition Circuit simultaneously same object to be carried out signals collecting, whether the collection signal that obtains according to two-way is identical or differently judge whether current Acquisition Circuit has the fault of existence, thereby make in advance precautionary measures, reach the purpose that improves the autodiagnosis coverage rate.Digital quantity acquiring circuit of the present invention, in a single day not only can finish the normal signal collection, and the hardware random failure occur, the corresponding malfunction that provides that this Acquisition Circuit can be intelligent is exported, to reach failure diagnosis, failure to the safe side processes to guarantee the integrality of system security function.
Description of drawings
Optocoupler digital quantity acquiring circuit schematic diagram in Fig. 1 prior art;
Fig. 2 digital quantity acquiring circuit schematic diagram with diagnostic function of the present invention.
Embodiment
As shown in Figure 2, digital quantity acquisition device externally gathers the contact type switch among the present invention, and by the two paths of signals Acquisition Circuit: signal acquisition circuit A and signal acquisition circuit B carry out the collection of same contact type switching signal, the two paths of signals Acquisition Circuit is transported to the signal that collects respectively in the fault judgement system, in a single day fault judges the result that system exports according to the two paths of signals Acquisition Circuit judges whether gatherer process exists unusually, therefore break down and just can find early and process.The concrete annexation of two paths of signals Acquisition Circuit is: signal acquisition circuit A and signal acquisition circuit B are respectively the optocoupler signal acquisition circuit, wherein the diode D3 backward end in the optocoupler A among the signal acquisition circuit A is connected with the contact type switch by protection diode D1, resistance R 2, the forward end of diode D3 is connected with supply voltage by resistance R 1, the collector electrode of triode Q1 is exported collection signal DI1_A and is connected the grounded emitter of triode Q1 with fault judgement system in the optocoupler A; The forward end of diode D4 in the optocoupler B among the signal acquisition circuit B is connected with 24V inquiry supply voltage by voltage stabilizing didoe D2, resistance R 1, supply voltage adopts 24V to can be used as the inquiry power supply of collection site contact switch signal, front end with diode D3 and diode D4 in the driving optocoupler, the backward end of diode D4 is connected with contact switch by capacitor C 1, resistance R 2, the collector electrode of triode Q2 is exported collection signal DI1_B and is connected the grounded emitter of triode Q2 with fault judgement system among the optocoupler B.The collector electrode of the triode Q2 that triode Q1 be connected with optocoupler B in the optocoupler A is connected with resistance R by resistance R 3 respectively and is identified voltage and be connected, and identification voltage is 3.3V, provides power supply to the numerical portion in the fault judgement system, here as DI1_A and DI1_B power level.
Be malfunction when the signal of collection signal DI1_A and collection signal DI1_B output is identical among the present invention, and DI1_A and DI1_B output signal when opposite each other for gathering normal condition.
The present invention utilizes optocoupler A and optocoupler B to consist of Acquisition Circuit, respectively the signal of same paths is gathered.D1 in the circuit is the protection diode, and in order to the large voltage signal that protection flows into when collection terminal is entered power pins by misconnection, channel part can bear the signal of maximum ± 40V among the present invention.
As shown in Figure 2, optocoupler A and optocoupler B adopt respectively the MOCD213 chip, when the contact type switch closure, source current flows into respectively the forward end of optocoupler A internal body diodes D3 and the backward end of D2 diode by R1, because contact type switch closure, therefore electric current is easy to the forward diode D3 by optocoupler A inside, flow back at last power supply negative terminal through D1 diode and contact type switch again, forms a complete electric power loop.When reverse withstand voltage the acquiring a certain degree of D2 diode, during greater than the voltage of optocoupler A internal body diodes D3 forward end this moment, source current can not puncture the D2 diode in theory, forms the second loop.Therefore can judge this moment, the DI1_A signal flows through enough electric currents owing to optocoupler A and voltage causes rear class to be overturn, thereby is " 0 "; DI1_B so does not have enough electric currents and voltage to pass optocoupler B because electric current is blocked at D2 place, and the optocoupler rear class can not overturn, and continues to be maintained to draw " 1 ".On the contrary, when the contact type switch disconnects, power supply signal flows into equally respectively the forward end of optocoupler A internal body diodes D3 and the backward end of D2 diode by R1, this moment is because the disconnection of contact type switch, even if therefore power supply signal is by optocoupler internal body diodes D3, still can't form loop stream telegram in reply source negative terminal behind D1 diode and the R2, can only more trend towards forming the loop by the D2 backward end; When D2 diode reverse withstand voltage during less than supply voltage, power supply signal can puncture D2, flow through that optocoupler B is last to form complete loop, flow back into power supply negative terminal.
Fault judgement system judges whether to exist fault according to the DI1_A of signal acquisition circuit A and signal acquisition circuit B output and the closed and disconnected two states of DI1_B among the present invention, the signal that is DI1_A and DI1_B all is in opposite each other state when normal operation, only have when the passage acquisition abnormity, cause the unusual upset of optocoupler rear end transmitted signal, the situation that DI1_A and DI1_B are in equal state just occurs.Fault judges that the standard of system sees Table one.
The signal condition table of table one DI1_A and DI1_B
| The Acquisition Circuit state | Contacts status | DI1_A | DI1_B | Treatment measures |
| Normally | Closed | 0 | 1 | The closure state data are effective |
| Normally | Disconnect | 1 | 0 | The off-state data are effective |
| Unusually | / | 1 | 1 | Channel failure, the invalid and warning of data |
| Unusually | / | 0 | 0 | Channel failure, the invalid and warning of data |
According to above-mentioned principle, R1 then, R2, R3, R4 and D1, the parameter of D2 and C1 just can be determined a complete scope, R3 and R4 are the pull-up resistor of 3.3V, therefore parameter rule of thumb, R3 and R4 get respectively 4.7K.The VZ of the parameter of R1 and R2 resistance and D2 diode is closely related.When the contact type switch disconnected, the D2 diode must be breakdown and be worked long hours in zones of inversions, so select Zener diode, VZ＜supply voltage (24V ± 20%)-optocoupler diode turn-on voltage (1.5V) is so VZ＜17.5V.When the contact type switch closure, the D2 diode can not breakdownly be operated in zones of inversions, so VZ is certain requires the end away from power supply when the conducting greater than R1.Here consider the On current of optocoupler about 4mA, then R=R1+R2=(24-2)/4=5.5K; Consider the scale effect VZ direction voltage minimum of R2 and R1, so get R2=510, R1=5.1K.At this moment: VZ (min)=(24-2) * 510/ (510+5100)+2=4.0V, so the VZ type selecting interval of D2 Zener diode is at (4.0V～17.5V).
When the contact type switch disconnected, optocoupler On current computing formula was: I=(24-VZ-1)/5.1k, and VZ〉4V, therefore use the optocoupler of VZ=8V: MMSZ5237BT1G, its reverse voltage VZ=8V, can get I=3mA this moment.
The D1 diode plays a protective role, and namely plays a protective role when the DI1 end is entered supply voltage by misconnection, and according to safe level IO board system demand, the DI passage can bear: ± 40V, so D1 must possess the above reverse voltage protection functions of 40V fully.Because D1 only plays the reverse protection function, to the voltage that D1 consumes, reverse operation state etc. is not all done requirement, can adopt rectifier diode MMSD4148T1G, and reverse withstand voltage 100V when this device is normal satisfies design requirement fully.
When the outside access-40V of DI passage, can draw according to existing resistance, owing to left behind through the voltage reality behind the R1, so the D2 diode can not be reversed conducting certainly, supply voltage be estimated as 30V, then the dividing potential drop on the R2 is near 6.5V, calculating is got off: P=V^2/R=0.083W, consider to guarantee as far as possible the device normal operation, and adopted 1210 encapsulation, power consumption is the resistance of 1/2W, to guarantee to greatest extent its normal operation.When-40V, the dividing potential drop on the R1 is up to 64V.Its power consumption is: P=V^2/R=0.83W, therefore adopt 5.1K resistance, maximum power dissipation 1W.The resistance maximum power dissipation selects the advantage of 1W to be that the resistance aspect can guarantee the normal operation of DIS digital input card passage acquisition function fully when the extremely abominable situation of appearance-40V.
Cause electric current large spike to occur for avoiding external switch to move frequently, so that optocoupler and outside switch reduce the life-span, even damage.The present invention has introduced the electric capacity of high pressure resistant low appearance value as safeguard measure, and when the switch saltus step, instantaneous energy impact is charged to first electric capacity, then by new loop energy is being released away.
The above only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, anyly be familiar with the technical staff of this patent within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned prompting is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the present invention program's the scope.
Claims (4)
1. digital quantity acquiring circuit with trouble diagnosibility, the contact type switch that comprises information to be collected, it is characterized in that, described contact type switch is connected with signal acquisition circuit A and signal acquisition circuit B, and judges according to two bars Acquisition Circuit Output rusults whether unusual fault is judged system to gatherer process.
2. digital quantity acquiring circuit as claimed in claim 1, it is characterized in that, described signal acquisition circuit A and signal acquisition circuit B are respectively the optocoupler signal acquisition circuit, wherein the diode D3 backward end in the optocoupler A among the signal acquisition circuit A is connected with the contact type switch by protection diode D1, resistance R 2, the forward end of diode D3 is connected with 24V inquiry supply voltage by resistance R 1, the collector electrode of triode Q1 is exported collection signal DI1_A and is connected the grounded emitter of triode Q1 with fault judgement system in the optocoupler A; The forward end of diode D4 in the optocoupler B among the signal acquisition circuit B is connected with supply voltage by voltage stabilizing didoe D2, resistance R 1, the backward end of diode D4 is connected with contact switch by capacitor C 1, resistance R 2, the collector electrode of triode Q2 is exported collection signal DI1_B and is connected the grounded emitter of triode Q2 with fault judgement system among the optocoupler B.
3. digital quantity acquiring circuit as claimed in claim 2 is characterized in that, the collector electrode of the triode Q2 that triode Q1 be connected with optocoupler B in the described optocoupler A is connected with resistance R by resistance R 3 respectively and is identified voltage and be connected.
4. digital quantity acquiring circuit as claimed in claim 3 is characterized in that, described fault judges that system is judged to be malfunction when the signal of DI1_A and DI1_B output is identical, and DI1_A and DI1_B output signal are judged to be normal condition when opposite each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451071.4A CN102916689B (en) | 2012-11-12 | 2012-11-12 | Digital value acquisition circuit with fault diagnosis capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451071.4A CN102916689B (en) | 2012-11-12 | 2012-11-12 | Digital value acquisition circuit with fault diagnosis capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102916689A true CN102916689A (en) | 2013-02-06 |
| CN102916689B CN102916689B (en) | 2015-04-22 |
Family
ID=47614942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210451071.4A Active CN102916689B (en) | 2012-11-12 | 2012-11-12 | Digital value acquisition circuit with fault diagnosis capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102916689B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187049A (en) * | 2015-07-21 | 2015-12-23 | 北京佳讯飞鸿电气股份有限公司 | Dynamic acquisition circuit of fail-safe principle and device of fail-safe principle |
| CN105717342A (en) * | 2016-03-18 | 2016-06-29 | 浙江中控技术股份有限公司 | Analog quantity current input collecting system |
| CN106291167A (en) * | 2016-07-26 | 2017-01-04 | 北京安控科技股份有限公司 | A kind of one takes a functional safety digital quantity input module adding diagnosis |
| CN107065716A (en) * | 2016-12-20 | 2017-08-18 | 中核控制系统工程有限公司 | A kind of digital quantity acquiring circuit with dynamic diagnosis failures |
| CN107607862A (en) * | 2017-09-01 | 2018-01-19 | 北京龙鼎源科技股份有限公司 | Circuit state diagnostic circuit and method |
| CN107908132A (en) * | 2017-11-07 | 2018-04-13 | 浙江中烟工业有限责任公司 | A kind of device and method merged for autodiagnosis link sensor with ordinary sensors signal |
| CN108107866A (en) * | 2017-11-24 | 2018-06-01 | 中核控制系统工程有限公司 | A kind of high-speed pulse amount Acquisition Circuit with dynamic diagnosis failures |
| CN109270920A (en) * | 2018-09-25 | 2019-01-25 | 北京广利核系统工程有限公司 | The self diagnostic capability evaluation method and device of the non-security grade I &C equipment of nuclear power station |
| CN109541343A (en) * | 2018-11-16 | 2019-03-29 | 陕西千山航空电子有限责任公司 | A kind of self-sensing method of discrete magnitude output interface |
| CN109557390A (en) * | 2018-11-16 | 2019-04-02 | 陕西千山航空电子有限责任公司 | A kind of self-detection circuit of discrete magnitude output interface |
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN111103862A (en) * | 2018-10-25 | 2020-05-05 | 比亚迪股份有限公司 | Digital quantity acquisition circuit with self-diagnosis function |
| CN111190047A (en) * | 2019-10-11 | 2020-05-22 | 浙江中控技术股份有限公司 | Current acquisition diagnosis circuit and failure diagnosis method thereof |
| CN111624916A (en) * | 2020-06-02 | 2020-09-04 | 徐州重型机械有限公司 | Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof |
| CN112702054A (en) * | 2020-12-22 | 2021-04-23 | 杭州和利时自动化有限公司 | Switching value input channel circuit and switching value receiving system |
| CN113687224A (en) * | 2021-09-18 | 2021-11-23 | 杭州和利时自动化有限公司 | Switching signal acquisition system and switching signal acquisition equipment thereof |
| CN115453957A (en) * | 2022-11-10 | 2022-12-09 | 浙江国利信安科技有限公司 | Digital quantity input acquisition system |
| CN116819213A (en) * | 2023-07-04 | 2023-09-29 | 中国建筑科学研究院有限公司 | Remote test self-adaptive interface data acquisition method, system and application program |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560997A (en) * | 2004-03-09 | 2005-01-05 | 国电南京自动化股份有限公司 | Module for judging D.C. voltage switching quantitative input state |
| CN102087334A (en) * | 2009-12-04 | 2011-06-08 | 北京广利核系统工程有限公司 | High-reliability digital quantity acquisition system |
| CN201867460U (en) * | 2010-12-20 | 2011-06-15 | 河南光彩电器有限公司 | Switching value acquisition module with function of detecting fault of external circuit |
| CN102169163A (en) * | 2010-12-30 | 2011-08-31 | 上海申瑞电力科技股份有限公司 | Alternating-current direct-current adaptive switching value collecting circuit and method |
| CN102346478A (en) * | 2011-09-08 | 2012-02-08 | 重庆长安汽车股份有限公司 | Circuit and method for detecting failures in data acquisition of overall controller of automobile |
| CN102436227A (en) * | 2011-09-16 | 2012-05-02 | 北京雪迪龙科技股份有限公司 | Method for collecting switching value signal by data acquisition transmitter |
-
2012
- 2012-11-12 CN CN201210451071.4A patent/CN102916689B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560997A (en) * | 2004-03-09 | 2005-01-05 | 国电南京自动化股份有限公司 | Module for judging D.C. voltage switching quantitative input state |
| CN102087334A (en) * | 2009-12-04 | 2011-06-08 | 北京广利核系统工程有限公司 | High-reliability digital quantity acquisition system |
| CN201867460U (en) * | 2010-12-20 | 2011-06-15 | 河南光彩电器有限公司 | Switching value acquisition module with function of detecting fault of external circuit |
| CN102169163A (en) * | 2010-12-30 | 2011-08-31 | 上海申瑞电力科技股份有限公司 | Alternating-current direct-current adaptive switching value collecting circuit and method |
| CN102346478A (en) * | 2011-09-08 | 2012-02-08 | 重庆长安汽车股份有限公司 | Circuit and method for detecting failures in data acquisition of overall controller of automobile |
| CN102436227A (en) * | 2011-09-16 | 2012-05-02 | 北京雪迪龙科技股份有限公司 | Method for collecting switching value signal by data acquisition transmitter |
Non-Patent Citations (1)
| Title |
|---|
| 牛若涛: "DCS在电厂电气系统中的应用", 《电力建设》 * |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187049A (en) * | 2015-07-21 | 2015-12-23 | 北京佳讯飞鸿电气股份有限公司 | Dynamic acquisition circuit of fail-safe principle and device of fail-safe principle |
| CN105187049B (en) * | 2015-07-21 | 2018-07-31 | 北京佳讯飞鸿电气股份有限公司 | The dynamic acquisition circuit of fault-safety principle and the device of fault-safety principle |
| CN105717342A (en) * | 2016-03-18 | 2016-06-29 | 浙江中控技术股份有限公司 | Analog quantity current input collecting system |
| CN105717342B (en) * | 2016-03-18 | 2018-10-16 | 浙江中控技术股份有限公司 | A kind of analog quantity electric current input acquisition system |
| CN106291167A (en) * | 2016-07-26 | 2017-01-04 | 北京安控科技股份有限公司 | A kind of one takes a functional safety digital quantity input module adding diagnosis |
| CN107065716B (en) * | 2016-12-20 | 2020-05-22 | 中核控制系统工程有限公司 | Digital quantity acquisition circuit with dynamic fault diagnosis capability |
| CN107065716A (en) * | 2016-12-20 | 2017-08-18 | 中核控制系统工程有限公司 | A kind of digital quantity acquiring circuit with dynamic diagnosis failures |
| CN107607862A (en) * | 2017-09-01 | 2018-01-19 | 北京龙鼎源科技股份有限公司 | Circuit state diagnostic circuit and method |
| CN107908132A (en) * | 2017-11-07 | 2018-04-13 | 浙江中烟工业有限责任公司 | A kind of device and method merged for autodiagnosis link sensor with ordinary sensors signal |
| CN107908132B (en) * | 2017-11-07 | 2020-01-21 | 浙江中烟工业有限责任公司 | Device and method for combining signals of self-diagnosis sensor and common sensor |
| CN108107866A (en) * | 2017-11-24 | 2018-06-01 | 中核控制系统工程有限公司 | A kind of high-speed pulse amount Acquisition Circuit with dynamic diagnosis failures |
| CN108107866B (en) * | 2017-11-24 | 2020-07-28 | 中核控制系统工程有限公司 | High-speed pulse quantity acquisition circuit with dynamic fault diagnosis capability |
| CN109270920B (en) * | 2018-09-25 | 2021-01-05 | 北京广利核系统工程有限公司 | Self-diagnosis capability evaluation method and device for non-safety instrument control equipment of nuclear power station |
| CN109270920A (en) * | 2018-09-25 | 2019-01-25 | 北京广利核系统工程有限公司 | The self diagnostic capability evaluation method and device of the non-security grade I &C equipment of nuclear power station |
| CN111103862A (en) * | 2018-10-25 | 2020-05-05 | 比亚迪股份有限公司 | Digital quantity acquisition circuit with self-diagnosis function |
| CN111103862B (en) * | 2018-10-25 | 2023-08-08 | 比亚迪股份有限公司 | Digital quantity acquisition circuit with self-diagnosis function |
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN109557390A (en) * | 2018-11-16 | 2019-04-02 | 陕西千山航空电子有限责任公司 | A kind of self-detection circuit of discrete magnitude output interface |
| CN109541343A (en) * | 2018-11-16 | 2019-03-29 | 陕西千山航空电子有限责任公司 | A kind of self-sensing method of discrete magnitude output interface |
| CN109557390B (en) * | 2018-11-16 | 2021-02-09 | 陕西千山航空电子有限责任公司 | Self-detection circuit of discrete magnitude output interface |
| CN111190047B (en) * | 2019-10-11 | 2022-03-25 | 浙江中控技术股份有限公司 | Current acquisition diagnosis circuit and failure diagnosis method thereof |
| CN111190047A (en) * | 2019-10-11 | 2020-05-22 | 浙江中控技术股份有限公司 | Current acquisition diagnosis circuit and failure diagnosis method thereof |
| CN111624916A (en) * | 2020-06-02 | 2020-09-04 | 徐州重型机械有限公司 | Functional safety type digital quantity input acquisition circuit and acquisition and diagnosis method thereof |
| CN112702054A (en) * | 2020-12-22 | 2021-04-23 | 杭州和利时自动化有限公司 | Switching value input channel circuit and switching value receiving system |
| CN113687224A (en) * | 2021-09-18 | 2021-11-23 | 杭州和利时自动化有限公司 | Switching signal acquisition system and switching signal acquisition equipment thereof |
| CN113687224B (en) * | 2021-09-18 | 2024-02-02 | 杭州和利时自动化有限公司 | Switch signal acquisition system and switch signal acquisition equipment thereof |
| CN115453957A (en) * | 2022-11-10 | 2022-12-09 | 浙江国利信安科技有限公司 | Digital quantity input acquisition system |
| CN115453957B (en) * | 2022-11-10 | 2023-02-17 | 浙江国利信安科技有限公司 | Digital quantity input acquisition system |
| CN116819213A (en) * | 2023-07-04 | 2023-09-29 | 中国建筑科学研究院有限公司 | Remote test self-adaptive interface data acquisition method, system and application program |
| CN116819213B (en) * | 2023-07-04 | 2024-04-16 | 中国建筑科学研究院有限公司 | Remote test self-adaptive interface data acquisition method, system and application program |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102916689B (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102916689B (en) | Digital value acquisition circuit with fault diagnosis capacity | |
| CN102970029A (en) | High-safety digital quantity signal acquisition circuit | |
| CN104767260A (en) | Charger, terminal device and charging system | |
| CN204068246U (en) | A kind of low pressure drop low-power dissipation power supply protective circuit | |
| CN102393625A (en) | Single-channel safety output | |
| CN103873030A (en) | Latched fault detection circuit and realizing method thereof | |
| CN103840429B (en) | Safety universal control circuit module and safety leakage protector | |
| CN103053222A (en) | Supervision circuit for organic light emitting diode | |
| CN203561843U (en) | Redundant on-off output channel | |
| CN103001282A (en) | Charge variable current protector | |
| CN107942245A (en) | Locomotive traction motor temperature redundancy monitoring method | |
| CN203761353U (en) | Fault detection circuit with latch | |
| CN201788261U (en) | Switching value detection circuit | |
| CN204189728U (en) | A kind of functional module of circuit breaker and circuit breaker | |
| CN208112210U (en) | A kind of short-circuit protection circuit | |
| CN106338942A (en) | Switch quantity acquisition circuit | |
| CN103337832B (en) | A kind of DC filter guard method | |
| CN207717932U (en) | Circuit state diagnostic circuit | |
| CN102269804A (en) | Method and device for detecting switching value detector | |
| CN206099747U (en) | Computer power module's undervoltage protection circuit excessively | |
| CN210109282U (en) | Monitoring alarm device of microcomputer protection power plug-in | |
| CN203433624U (en) | Aftercurrent type electrical fire monitoring detector based on C-MBUS communication | |
| CN202975686U (en) | Protective relaying device intelligent input board card | |
| CN103529341B (en) | Remote control circuit testing circuit for negative control terminal | |
| CN206272139U (en) | A kind of electronic type of distribution terminal it is anti-jump and point, combined floodgate monitoring arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100094 Yongfeng Road, Beijing, No., building 5, building 5 Applicant after: Beijing Guangli Nuclear Power Co., Ltd. Applicant after: China General Nuclear Power Corporation Address before: 100094 Yongfeng Road, Beijing, No., building 5, building 5 Applicant before: Beijing Guangli Nuclear Power Co., Ltd. Applicant before: China Guangdong Nuclear Power Group Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |