CN109557390A - A kind of self-detection circuit of discrete magnitude output interface - Google Patents
A kind of self-detection circuit of discrete magnitude output interface Download PDFInfo
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- CN109557390A CN109557390A CN201811367752.6A CN201811367752A CN109557390A CN 109557390 A CN109557390 A CN 109557390A CN 201811367752 A CN201811367752 A CN 201811367752A CN 109557390 A CN109557390 A CN 109557390A
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- switch
- optocoupler
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- detection circuit
- discrete magnitude
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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Abstract
The invention belongs to avionicses, and in particular to a kind of self-detection circuit of discrete magnitude output interface；Including discrete magnitude output channel unit, test point voltage acquisition unit, optical coupled switch control unit, test voltage injection unit；Optical coupled switch by configuring auxiliary in primary path goes the working condition of self-test access, self-detection circuit of the invention provides a kind of discrete magnitude output interface self-detection circuit, is quickly found with low cost, the realization discrete magnitude output interface failure of high stability, the self-checking function of quick response.
Description
Technical field
The invention belongs to avionicses, and in particular to a kind of self-detection circuit of discrete magnitude output interface.
Background technique
In avionics field, discrete magnitude output interface is an especially important interface, as discrete magnitude output connects
The discrete signal (switching signal) of mouth output can directly or indirectly control the opening and closing of gasoline pump, if in flight course
Since discrete magnitude output interface failure leads to gasoline pump cisco unity malfunction, such as discovery alerts and implements corresponding measure not in time,
It centainly will cause serious consequence.Traditional discrete magnitude output interface self-detection circuit is all in control command starting point and discrete magnitude
Output end detects, and control is cumbersome, midway through too many circuit, the originals such as component itself failure rate height at high cost and circuit
Cause causes testing result unstable, and the response of even mistake cannot be timely responded to for the failure of generation.
Summary of the invention
The object of the present invention is to provide a kind of self-detection circuits of discrete magnitude output interface, and it is electromechanical to be suitable for aviation field
The self-test of discrete magnitude output interface in system, to solve, traditional self-detection circuit intermediate ring road is too long, control is cumbersome caused
The technical issues of failure cannot timely respond to.
To solve this technical problem, the technical scheme is that
A kind of self-detection circuit of discrete magnitude output interface, the self-detection circuit of the discrete magnitude output interface include from
Dissipate amount output channel unit, test point voltage acquisition unit, optical coupled switch control unit, test voltage injection unit；
The discrete magnitude output channel unit includes by the sequentially connected optocoupler A switch of route, optocoupler B switch, isolation
Diode；The discrete magnitude output channel unit front end connects input voltage, and rear end connects output voltage；
The test point voltage acquisition unit includes the first signal conditioning module, A/D conversion module；The optocoupler B
Switch ends pass through the first signal conditioning module respectively and are connected to A/D conversion module；
The optical coupled switch control unit is optical coupled switch control module；The optical coupled switch control module passes through route
It is respectively connected to optocoupler A switch and optocoupler B switch；
The test voltage injection unit includes being improved by the test voltage injection module and second signal of connection
Module；The test voltage injection module is connected to optocoupler A switch by second signal conditioning module and optocoupler B switchs it
Between.
The test point voltage acquisition unit is used to acquire the voltage of optocoupler B switch ends.
The test voltage injection unit is used to inject test voltage when detecting the working condition of optocoupler B switch.
The optical coupled switch control module is used to control the open and close of optocoupler A switch and optocoupler B switch.
The isolating diode is used in detection optocoupler B switch for the test voltage of injection to be isolated.
When the described self-detection circuit normal operating conditions:
Test voltage injection unit does not work, and test point voltage acquisition unit works normally, and optocoupler A switch is in closed form
State, optocoupler B switch execute switching action according to optical coupled switch control module.
When the self-detection circuit detection optocoupler A is switched:
Test point voltage acquisition unit works normally, and test voltage injection unit does not work, and detection optocoupler A switch, which is in, to be closed
Conjunction state, optocoupler B switch are in an off state.
When the self-detection circuit detection optocoupler B is switched:
Test point voltage acquisition unit works normally, the work of test voltage injection unit, and detection optocoupler A switch, which is in, to be disconnected
State, optocoupler B switch are in closed state.
The beneficial effects of the present invention are: the self-detection circuit of discrete magnitude output interface of the invention connects according to discrete magnitude output
Whether the voltage value that mouth monitors collection point under different working condition is normal, to differentiate the validity of output interface.Monitoring point point
Be not arranged between the interface gateway being isolated by optical coupled switch, it is this segmentation detection voltage detection circuit, can reach front and back end every
Output is not influenced from, detection behavior, failure is quickly found, the self-test purpose of quick response.Self-detection circuit pertains only to optocoupler
The control of switch and the acquisition of voltage, the component used is few, and control is simple, and detection circuit itself is not easy failure.
Detailed description of the invention
Fig. 1 is the functional block diagram of the self-detection circuit of discrete magnitude output interface of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples:
It is as shown in Figure 1 the principle of the present invention block diagram, specific structure is as follows: including discrete magnitude output channel unit, detection
Point voltage acquisition unit, optical coupled switch control unit, test voltage injection unit；The discrete magnitude output channel unit includes
By the sequentially connected optocoupler A switch of route, optocoupler B switch, isolating diode；The discrete magnitude output channel unit front end connects
Input voltage is connect, rear end connects output voltage；The test point voltage acquisition unit includes the first signal conditioning module, A/D
Conversion module；The optocoupler B switch ends pass through the first signal conditioning module respectively and are connected to A/D conversion module；The light
Coupling switch control unit is optical coupled switch control module；The optical coupled switch control module is respectively connected to optocoupler by route
A switch and optocoupler B switch；The test voltage injection unit includes by the test voltage injection module of connection and second
Signal conditioning module；The test voltage injection module is connected to optocoupler A switch and optocoupler B by second signal conditioning module
Between switch.
The test point voltage acquisition unit is used to acquire the voltage of optocoupler B switch ends.
The test voltage injection unit is used to inject test voltage when detecting the working condition of optocoupler B switch.
The optical coupled switch control module is used to control the open and close of optocoupler A switch and optocoupler B switch.
The isolating diode is used in detection optocoupler B switch for the test voltage of injection to be isolated.
Increase the circuit isolation segmentation that the optocoupler B switch of auxiliary will need to detect, segmentation detection is carried out, for the logical of segmentation
Voltage monitoring point is respectively set in road, carries out fault distinguishing according to collected monitoring point voltage value, and any one segment fault then alerts,
And optical coupled switch is disconnected, it avoids accidentally exporting.The detection circuit of this segmentation detection voltage can reach front and back end isolation, detection row
Not influence output, failure is quickly found, the self-test purpose of quick response.
Claims (8)
1. a kind of self-detection circuit of discrete magnitude output interface, it is characterised in that: the self-test of the discrete magnitude output interface
Circuit includes discrete magnitude output channel unit, test point voltage acquisition unit, optical coupled switch control unit, test voltage injection list
Member；
The discrete magnitude output channel unit includes by the sequentially connected optocoupler A switch of route, optocoupler B switch, two poles of isolation
Pipe；The discrete magnitude output channel unit front end connects input voltage, and rear end connects output voltage；
The test point voltage acquisition unit includes the first signal conditioning module, A/D conversion module；The optocoupler B switch
Both ends pass through the first signal conditioning module respectively and are connected to A/D conversion module；
The optical coupled switch control unit is optical coupled switch control module；The optical coupled switch control module is distinguished by route
It is connected to optocoupler A switch and optocoupler B switch；
The test voltage injection unit includes the test voltage injection module and second signal conditioning module by connection；
The test voltage injection module is connected between optocoupler A switch and optocoupler B switch by second signal conditioning module.
2. the self-detection circuit of discrete magnitude output interface according to claim 1, it is characterised in that: the test point electricity
Pressure acquisition unit is used to acquire the voltage of optocoupler B switch ends.
3. the self-detection circuit of discrete magnitude output interface according to claim 1, it is characterised in that: the test voltage
Injection unit is used to inject test voltage when detecting the working condition of optocoupler B switch.
4. the self-detection circuit of discrete magnitude output interface according to claim 1, it is characterised in that: the optical coupled switch
Control module is used to control the open and close of optocoupler A switch and optocoupler B switch.
5. the self-detection circuit of discrete magnitude output interface according to claim 1, it is characterised in that: two pole of isolation
Pipe in detection optocoupler B switch for being used to be isolated the test voltage of injection.
6. the self-detection circuit of discrete magnitude output interface according to one of claims 1 to 5, it is characterised in that: described
When self-detection circuit normal operating conditions:
Test voltage injection unit does not work, and test point voltage acquisition unit works normally, and optocoupler A switch is in closed state,
Optocoupler B switch executes switching action according to optical coupled switch control module.
7. the self-detection circuit of discrete magnitude output interface according to one of claims 1 to 5, it is characterised in that: described
When self-detection circuit detects optocoupler A switch:
Test point voltage acquisition unit works normally, and test voltage injection unit does not work, and detection optocoupler A switch is in closed form
State, optocoupler B switch are in an off state.
8. the self-detection circuit of discrete magnitude output interface according to one of claims 1 to 5, it is characterised in that: described
When self-detection circuit detects optocoupler B switch:
Test point voltage acquisition unit works normally, the work of test voltage injection unit, and detection optocoupler A switch, which is in, disconnects shape
State, optocoupler B switch are in closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367752.6A CN109557390B (en) | 2018-11-16 | 2018-11-16 | Self-detection circuit of discrete magnitude output interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367752.6A CN109557390B (en) | 2018-11-16 | 2018-11-16 | Self-detection circuit of discrete magnitude output interface |
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| Publication Number | Publication Date |
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| CN109557390A true CN109557390A (en) | 2019-04-02 |
| CN109557390B CN109557390B (en) | 2021-02-09 |
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| CN201811367752.6A Active CN109557390B (en) | 2018-11-16 | 2018-11-16 | Self-detection circuit of discrete magnitude output interface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110457168A (en) * | 2019-07-02 | 2019-11-15 | 中国航空工业集团公司雷华电子技术研究所 | A kind of low-speed interface self-sensing method for data processing |
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| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
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| CN102916689A (en) * | 2012-11-12 | 2013-02-06 | 北京广利核系统工程有限公司 | Digital value acquisition circuit with fault diagnosis capacity |
| CN103018668A (en) * | 2012-12-17 | 2013-04-03 | 北京交控科技有限公司 | Switching value acquisition method and device |
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| CN105137966A (en) * | 2015-10-20 | 2015-12-09 | 浙江中控技术股份有限公司 | Switch signal output channel detection method and structure |
| CN106353611A (en) * | 2015-07-17 | 2017-01-25 | 陕西千山航空电子有限责任公司 | Testing device for switching value acquisition module |
| CN106646036A (en) * | 2016-11-28 | 2017-05-10 | 北京动力源科技股份有限公司 | Switching value detection circuit and method, and electronic device |
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| US20080112100A1 (en) * | 2006-11-10 | 2008-05-15 | Daniel Liu | Digital electric leakage detecting and monitoring device |
| US20100094574A1 (en) * | 2008-10-10 | 2010-04-15 | Guangyu He | Method for state estimation based on the measured data of the data-acquisition system in power system |
| CN102916689A (en) * | 2012-11-12 | 2013-02-06 | 北京广利核系统工程有限公司 | Digital value acquisition circuit with fault diagnosis capacity |
| CN103018668A (en) * | 2012-12-17 | 2013-04-03 | 北京交控科技有限公司 | Switching value acquisition method and device |
| CN104035003A (en) * | 2014-06-28 | 2014-09-10 | 国家电网公司 | Single-segmented-bus parallel-PT logic judgment method for selecting line with small grounding current |
| CN106353611A (en) * | 2015-07-17 | 2017-01-25 | 陕西千山航空电子有限责任公司 | Testing device for switching value acquisition module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110457168A (en) * | 2019-07-02 | 2019-11-15 | 中国航空工业集团公司雷华电子技术研究所 | A kind of low-speed interface self-sensing method for data processing |
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| CN109557390B (en) | 2021-02-09 |
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