CN109557390B - Self-detection circuit of discrete magnitude output interface - Google Patents
Self-detection circuit of discrete magnitude output interface Download PDFInfo
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- CN109557390B CN109557390B CN201811367752.6A CN201811367752A CN109557390B CN 109557390 B CN109557390 B CN 109557390B CN 201811367752 A CN201811367752 A CN 201811367752A CN 109557390 B CN109557390 B CN 109557390B
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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 the avionics technology, and particularly relates to a self-detection circuit of a discrete magnitude output interface; the device comprises a discrete magnitude output access unit, a detection point voltage acquisition unit, an optical coupling switch control unit and a test voltage injection unit; the self-detection circuit provided by the invention has the advantages that the self-detection circuit of the discrete quantity output interface is provided by configuring the auxiliary optical coupling switch in the main channel to automatically detect the working state of the channel, and the self-detection function of rapidly finding and responding to the fault of the discrete quantity output interface is realized with low cost and high stability.
Description
Technical Field
The invention belongs to the avionics technology, and particularly relates to a self-detection circuit of a discrete magnitude output interface.
Background
In the field of avionics technology, a discrete quantity output interface is a particularly important interface, for example, discrete signals (switching signals) output by the discrete quantity output interface can indirectly or directly control the on and off of a gasoline pump, and if the gasoline pump cannot normally work due to the fault of the discrete quantity output interface in the flight process, if an alarm is not found in time and corresponding measures are implemented, serious consequences are certainly caused. The traditional discrete magnitude output interface self-detection circuit detects at a control command starting end and a discrete magnitude output end, is complex to control, passes through too many circuits midway, is high in cost and has high failure rate of components in the circuit, so that the detection result is unstable, and the fault can not be responded in time or even mistakenly responded.
Disclosure of Invention
The purpose of the invention is: the self-detection circuit of the discrete magnitude output interface is suitable for self-detection of the discrete magnitude output interface in an electromechanical system in the field of aviation, and solves the technical problems that faults caused by overlong loops and complicated control cannot respond timely in the traditional self-detection circuit.
In order to solve the technical problem, the technical scheme of the invention is as follows:
the self-detection circuit of the discrete magnitude output interface comprises a discrete magnitude output access unit, a detection point voltage acquisition unit, an optical coupling switch control unit and a test voltage injection unit;
the discrete quantity output access unit comprises an optical coupler A switch, an optical coupler B switch and an isolation diode which are sequentially connected through a circuit; the front end of the discrete magnitude output path unit is connected with an input voltage, and the rear end of the discrete magnitude output path unit is connected with an output voltage;
the detection point voltage acquisition unit comprises a first signal conditioning module and an A/D conversion module; two ends of the optical coupler B switch are respectively connected to the A/D conversion module through the first signal conditioning module;
the optical coupling switch control unit is an optical coupling switch control module; the optical coupling switch control module is respectively connected to the optical coupling A switch and the optical coupling B switch through lines;
the test voltage injection unit comprises a test voltage injection module and a second signal conditioning module which are connected through a line; and the test voltage injection module is connected between the optical coupler A switch and the optical coupler B switch through the second signal conditioning module.
And the detection point voltage acquisition unit is used for acquiring the voltages at two ends of the optocoupler B switch.
The test voltage injection unit is used for injecting test voltage when detecting the working state of the optical coupler B switch.
And the optical coupler switch control module is used for controlling the on and off of the optical coupler A switch and the optical coupler B switch.
The isolation diode is used for detecting the test voltage which is used for isolation injection of the optical coupler B switch.
When the self-detection circuit is in a normal working state:
the test voltage injection unit does not work, the detection point voltage acquisition unit works normally, the optocoupler A switch is in a closed state, and the optocoupler B switch executes opening and closing operations according to the optocoupler switch control module.
When the self-detection circuit detects the switch of the optocoupler A:
the detection point voltage acquisition unit works normally, the test voltage injection unit does not work, the detection optocoupler A switch is in a closed state, and the optocoupler B switch is in an open state.
When the self-detection circuit detects the switch of the optocoupler B:
the detection point voltage acquisition unit works normally, the test voltage injection unit works, the detection optocoupler A switch is in an off state, and the optocoupler B switch is in an on state.
The invention has the beneficial effects that: the self-detection circuit of the discrete quantity output interface judges the effectiveness of the output interface according to whether the voltage value of the acquisition point of the discrete quantity output interface is normal or not under different working states. The monitoring points are respectively arranged between the interface passages isolated by the optical coupling switch, and the detection circuit for detecting the voltage in sections can achieve the self-detection purposes that the front end and the rear end are isolated, the detection behavior does not influence the output, the fault is rapidly found, and the fault is rapidly responded. The self-detection circuit only relates to the control of the optical coupling switch and the voltage acquisition, the used components are few, the control is simple, and the self-detection circuit is not easy to break down.
Drawings
Fig. 1 is a schematic block diagram of a self-detection circuit of the discrete quantity output interface of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
fig. 1 shows a schematic block diagram of the present invention, which has the following specific structure: the device comprises a discrete magnitude output access unit, a detection point voltage acquisition unit, an optical coupling switch control unit and a test voltage injection unit; the discrete quantity output access unit comprises an optical coupler A switch, an optical coupler B switch and an isolation diode which are sequentially connected through a circuit; the front end of the discrete magnitude output path unit is connected with an input voltage, and the rear end of the discrete magnitude output path unit is connected with an output voltage; the detection point voltage acquisition unit comprises a first signal conditioning module and an A/D conversion module; two ends of the optical coupler B switch are respectively connected to the A/D conversion module through the first signal conditioning module; the optical coupling switch control unit is an optical coupling switch control module; the optical coupling switch control module is respectively connected to the optical coupling A switch and the optical coupling B switch through lines; the test voltage injection unit comprises a test voltage injection module and a second signal conditioning module which are connected through a line; and the test voltage injection module is connected between the optical coupler A switch and the optical coupler B switch through the second signal conditioning module.
And the detection point voltage acquisition unit is used for acquiring the voltages at two ends of the optocoupler B switch.
The test voltage injection unit is used for injecting test voltage when detecting the working state of the optical coupler B switch.
And the optical coupler switch control module is used for controlling the on and off of the optical coupler A switch and the optical coupler B switch.
The isolation diode is used for detecting the test voltage which is used for isolation injection of the optical coupler B switch.
The circuit that increases supplementary opto-coupler B switch and will need to detect keeps apart the segmentation, carries out the segmentation and detects, sets up the voltage monitoring point respectively to the passageway of segmentation, carries out the fault discrimination according to the monitoring point voltage value who gathers, and arbitrary one section trouble then reports an emergency and asks for help or increased vigilance to break off opto-coupler switch, avoid the mistake output. The detection circuit for detecting the voltage in the segmented mode can achieve the self-detection purposes of front-end and rear-end isolation, no influence on output by detection behaviors, quick fault finding and quick response.
Claims (7)
1. A self-detection circuit of a discrete magnitude output interface is characterized in that: the self-detection circuit of the discrete magnitude output interface comprises a discrete magnitude output access unit, a detection point voltage acquisition unit, an optical coupling switch control unit and a test voltage injection unit;
the discrete quantity output access unit comprises an optical coupler A switch, an optical coupler B switch and an isolation diode which are sequentially connected through a circuit; the front end of the discrete magnitude output path unit is connected with an input voltage, and the rear end of the discrete magnitude output path unit is connected with an output voltage;
the detection point voltage acquisition unit comprises a first signal conditioning module and an A/D conversion module; two ends of the optical coupler B switch are respectively connected to the A/D conversion module through the first signal conditioning module;
the optical coupling switch control unit is an optical coupling switch control module; the optical coupling switch control module is respectively connected to the optical coupling A switch and the optical coupling B switch through lines;
the test voltage injection unit comprises a test voltage injection module and a second signal conditioning module which are connected through a line; and the test voltage injection module is connected between the optical coupler A switch and the optical coupler B switch through the second signal conditioning module.
2. The self-detection circuit of the discrete quantity output interface according to claim 1, wherein: and the detection point voltage acquisition unit is used for acquiring the voltages at two ends of the optocoupler B switch.
3. The self-detection circuit of the discrete quantity output interface according to claim 1, wherein: the test voltage injection unit is used for injecting test voltage when detecting the working state of the optical coupler B switch.
4. The self-detection circuit of the discrete quantity output interface according to claim 1, wherein: and the optical coupler switch control module is used for controlling the on and off of the optical coupler A switch and the optical coupler B switch.
5. The self-detection circuit of the discrete magnitude output interface according to one of claims 1 to 4, wherein: when the self-detection circuit is in a normal working state:
the test voltage injection unit does not work, the detection point voltage acquisition unit works normally, the optocoupler A switch is in a closed state, and the optocoupler B switch executes opening and closing operations according to the optocoupler switch control module.
6. The self-detection circuit of the discrete magnitude output interface according to one of claims 1 to 4, wherein: when the self-detection circuit detects the switch of the optocoupler A:
the detection point voltage acquisition unit works normally, the test voltage injection unit does not work, the detection optocoupler A switch is in a closed state, and the optocoupler B switch is in an open state.
7. The self-detection circuit of the discrete magnitude output interface according to one of claims 1 to 4, wherein: when the self-detection circuit detects the switch of the optocoupler B:
the detection point voltage acquisition unit works normally, the test voltage injection unit works, the detection optocoupler A switch is in an off state, and the optocoupler B switch is in an on state.
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| CN201811367752.6A CN109557390B (en) | 2018-11-16 | 2018-11-16 | Self-detection circuit of discrete magnitude output interface |
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| CN201811367752.6A CN109557390B (en) | 2018-11-16 | 2018-11-16 | Self-detection circuit of discrete magnitude output interface |
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| CN109557390B true CN109557390B (en) | 2021-02-09 |
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| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916689A (en) * | 2012-11-12 | 2013-02-06 | 北京广利核***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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200821609A (en) * | 2006-11-10 | 2008-05-16 | Prodigit Electronics Co Ltd | Digital electric leakage detection monitoring device |
| CN101383511B (en) * | 2008-10-10 | 2010-08-04 | 清华大学 | Electrical power system status estimation method based on measurement data by data collection system |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916689A (en) * | 2012-11-12 | 2013-02-06 | 北京广利核***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 |
| 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 |
| 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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