CN106404034B - A kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit - Google Patents
A kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit Download PDFInfo
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- CN106404034B CN106404034B CN201610695180.9A CN201610695180A CN106404034B CN 106404034 B CN106404034 B CN 106404034B CN 201610695180 A CN201610695180 A CN 201610695180A CN 106404034 B CN106404034 B CN 106404034B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
Abstract
The present invention provides a kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit, including for measure each functional unit of electric vortex type proximity sensor whether be under normal operating conditions by close to self-test and far from the On-line self-diagnosis circuit of self test mode；The On-line self-diagnosis circuit includes test circuit part and self-checking circuit part；According to the On-line self-diagnosis circuit, to determine to cause the circuit signal for testing circuit part that the difference with the output signal under original state occurs when the variation of the distance between target and probe, to complete self-test；It includes self-checking circuit power supply and the exciting unit and breakdown judge unit that are separately connected with the self-checking circuit power supply that circuit part, which is tested, including test circuit power supply, oscillating circuit, detecting circuit, return difference circuit and power amplifier, self-checking circuit part.On-line self-diagnosis circuit structure provided by the invention is simple, and self checking method is easily achieved, and has high reliability, while having good self-test effect.
Description
Technical field
The present invention relates to current vortex field of sensing technologies, and in particular to a kind of electric vortex type proximity sensor On-line self-diagnosis side
Method and self-checking circuit.
Background technique
Electric vortex type close to sensing be a kind of sensor to be worked using eddy current effect, due to its structure is simple,
High sensitivity, frequency response range be wide, is not influenced by media such as greasy dirts, so can be carried out non-cpntact measurement, has a wide range of application,
It has just been taken seriously since appearance, is widely used in Non-Electricity Measurements such as position, displacement, vibration, thickness, revolving speed, hardness and lossless
The fields such as flaw detection.Electric vortex type proximity sensor is the important composition portion of Aircraft landing gear system and door-down switch monitoring system
Point, it is suitable in safety, reliability, economy, environment to electric vortex type proximity sensor as aeroplane performance requires to be continuously improved
Answering property etc. proposes tightened up requirement.External electric vortex type proximity sensor has been used for commercial and military aircraft rise
Fall frame, flight controller, thrust reverser and bay door system.Currently, the hatch door and undercarriage of domestic dual-use aircraft
System mainly uses contact stroke sensor, contact stroke sensor the problems such as there are the service life is short and poor reliability, therefore
It is inexorable trend that electric vortex type proximity sensor, which substitutes contact stroke sensor,.
With the fast development of aeronautical technology, the functional requirement of equipment, performance requirement and use environment are required constantly to mention
It rises, the complication of system, synthesization, intelligence degree are also continuously improved, and such as how more economical mode meets aircraft utilization
Efficiency and quick, accurate, lasting supportability demand, fault diagnosis, prognostics and health management technology obtain more and more
Pay attention to and applies.Being acquired using sensor to its each system parameter is its necessary item for carrying out fault diagnosis and health control
Part, and the inspection of the health status of sensor itself --- self-test be then applied to system fault diagnosis and health control whether
Capable of playing a role, it is vital to play the role of, thus the self-test of sensor be system fault diagnosis with it is health management system arranged
The part of segmentation.Electric vortex type proximity sensor wouldn't have On-line self-diagnosis function at present, go out in electric vortex type proximity sensor
In the case where existing failure, most basic inspection method is to remove it from system, is individually powered to it, using target it is separate or
Proximity sensor observes whether sensor output signal meets technical requirements simultaneously, and the method for this manual inspection failure is on the one hand
Waste of manpower and material resources, on the other hand this method can not execute at all in most cases.With the complicated journey of system
Benefit of subsisting increases, and the testability and maintainability of sensor will be faced with formidable challenges.Electric vortex type proximity sensor is hindered to exist
The application and popularization of aviation field.
Summary of the invention
In view of this, the main object of the present invention is the problem of not can be carried out self-test according to electric vortex type proximity sensor,
It provides a kind of by hardware circuit realization electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit.
In order to achieve the above object, the invention discloses a kind of method of electric vortex type proximity sensor On-line self-diagnosis, packets
Include following steps:
The variation of the distance between target and probe causes the quality factor of probe interior loop to change, and causes oscillating circuit
Working condition change, the output signal of the oscillating circuit generates through power amplifier again after detecting circuit, return difference processing of circuit
Output signal between target and probe under the corresponding original state of distance；When carrying out self-test, self-test control signal is acted as
With storage circuit saves the output signal under original state, and is made according to the output signal under the original state far from excitation electricity
Road generates pumping signal close to exciting circuit, and pumping signal makes the working condition of oscillating circuit generate variation, oscillating circuit
Output signal generates exciter response signal through power amplifier after detecting circuit, return difference processing of circuit, and logic circuit rings excitation
Induction signal is compared with the output signal under original state generates self-test output signal, completes a self-test.
A kind of electric vortex type proximity sensor On-line self-diagnosis circuit is for measuring each function of electric vortex type proximity sensor
It includes close to self-test and far from the On-line self-diagnosis circuit of self test mode that whether unit, which is under normal operating conditions,；
The On-line self-diagnosis circuit includes test circuit part and self-checking circuit part；
The test circuit part includes test circuit power supply, oscillating circuit, detecting circuit, return difference circuit and power amplifier
Circuit, the test circuit power supply are separately connected oscillating circuit, detecting circuit and power amplifier, and the oscillating circuit passes through
Detecting circuit is connected to power amplifier all the way, and another way is connected to return difference circuit, the return difference circuit connection to the oscillating circuit；
The self-checking circuit part includes self-checking circuit power supply and is separately connected with the self-checking circuit power supply
Exciting unit and breakdown judge unit；
The exciting unit is used under the control of self-test control signal, is controlled to the working condition of test circuit part
System, keeps pumping signal opposite with the output signal under original state comprising described far from exciting circuit and close to exciting circuit
It is used to far from exciting circuit or close to exciting circuit generate pumping signal when target is close to or away from sensor；
The breakdown judge unit is for that can automatically determine pumping signal side according to the output signal under original state
To, while exciter response signal being compared with initial state output signal, normal or fault-signal is exported, to realize to electricity
The On-line self-diagnosis function of vortex type proximity sensor comprising the storage circuit that the output signal under original state is saved
And the logic circuit that exciter response signal is compared with the output signal under original state.
Further, the self-checking circuit power supply is respectively connected to storage circuit, logic circuit, far from exciting circuit
And close to exciting circuit, the storage circuit is connect with logic circuit, far from exciting circuit and close to exciting circuit respectively, described
Far from exciting circuit and being connect respectively with oscillating circuit close to exciting circuit, the power amplifier respectively with storage circuit and logic
Circuit connection.
The invention has the benefit that the electric vortex type proximity sensor On-line self-diagnosis method structure that invention provides is simple,
It being easily achieved, there is high reliability, while there is good self-test effect, fault detection rate reaches 80 or more percent,
The technical issues of solving electric vortex type proximity sensor not and can be carried out self-test, there is very huge practical value and economic valence
Value.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention；
Fig. 2 is circuit diagram of the invention.
Wherein, the title of various pieces and mark are as follows:
1- tests circuit part, 2- probe, 3- target, 4- self-checking circuit part, 5- self-test control signal, 1.1- test electricity
Road power supply, 1.3- oscillating circuit, 1.4- detecting circuit, 1.5- return difference circuit, 1-6 power amplifier, 4.1- self-checking circuit supply
Power supply, 4.2- storage circuit, 4.3- is far from exciting circuit, and 4.4- is close to exciting circuit, 4.5- logic circuit, and 4.6 self-tests are defeated
Signal out.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein illustrative examples of the invention
And explanation is used to explain the present invention, but not as a limitation of the invention.
Referring to Fig.1 with Fig. 2, the invention discloses a kind of methods of electric vortex type proximity sensor On-line self-diagnosis, including such as
Lower step:
The variation of the distance between target 3 and probe 2 causes the quality factor of 2 interior loops of probe to change, and causes to vibrate
The working condition of circuit 1.3 changes, and the output signal of the oscillating circuit 1.3 is after detecting circuit 1.4, the processing of return difference circuit 1.5
The output signal between target 3 and probe 2 under the corresponding original state of distance is generated through power amplifier 1.6 again；It is carrying out certainly
When inspection, self-test control signal 5 works, and storage circuit 4.2 saves the output signal under original state, and according to the original state
Under output signal make far from exciting circuit 4.3 or close to exciting circuit 4.4 generate pumping signal, the pumping signal make oscillation electricity
The working condition on road 1.3 generates variation, the output signal of the oscillating circuit 1.3 through detecting circuit 1.4, return difference circuit 1.5 at
Exciter response signal is generated through power amplifier 1.6 after reason, and logic circuit 4.5 is by the output under exciter response signal and original state
Signal, which is compared, generates self-test output signal 6, completes a self-test.
A kind of electric vortex type proximity sensor On-line self-diagnosis circuit is for measuring each function of electric vortex type proximity sensor
It includes close to self-test and far from the On-line self-diagnosis circuit of self test mode that whether unit, which is under normal operating conditions,；
The On-line self-diagnosis circuit includes test circuit part 1 and self-checking circuit part 4；
The test circuit part 1 includes test circuit power supply 1.1, oscillating circuit 1.3, detecting circuit 1.4, return difference
Circuit 1.5 and power amplifier 1.6, the test circuit power supply 1.1 be separately connected oscillating circuit 1.3, detecting circuit 1.4 and
Power amplifier 1.6, the oscillating circuit 1.3 are connected to power amplifier 1.6 by 1.4 1 tunnel of detecting circuit, and another way is connected to
Return difference circuit 1.5, the return difference circuit 1.5 are connected to the oscillating circuit 1.3；
The self-checking circuit part 4 includes self-checking circuit power supply 4.1 and divides with the self-checking circuit power supply 4.1
The exciting unit and breakdown judge unit not connected；
The exciting unit is used under the control of self-test control signal 5, is carried out to the working condition of test circuit part
Control, keeps pumping signal opposite with the output signal under original state comprising separate exciting circuit 4.3 and close to exciting circuit
4.4, it the separate exciting circuit 4.3 or is used to generate excitation when target 3 is close to or away from sensor close to exciting circuit 4.4
Signal；
The breakdown judge unit is for that can automatically determine pumping signal side according to the output signal under original state
To, while exciter response signal being compared with initial state output signal, normal or fault-signal is exported, to realize to electricity
The On-line self-diagnosis function of vortex type proximity sensor comprising the storage circuit that the output signal under original state is saved
4.2 and logic circuit 4.5 that exciter response signal is compared with the output signal under original state.
The self-checking circuit power supply 4.1 is respectively connected to storage circuit 4.2, logic circuit 4.5, far from exciting circuit
4.3 and close to exciting circuit 4.4, the storage circuit 4.2 is respectively with logic circuit 4.5, far from exciting circuit 4.3 and close to swashing
The connection of circuit 4.4 is encouraged, the separate exciting circuit 4.3 and is connect respectively with oscillating circuit 1.3 close to exciting circuit 4.4, it is described
Power amplifier 1.6 is connect with storage circuit 4.2 and logic circuit 4.5 respectively.
The present invention is that it is abnormal to establish electric vortex type proximity sensor according to electric vortex type proximity sensor measuring circuit principle
Fault tree has obtained the minimum and effective malfunction monitoring point of electric vortex type proximity sensor, by right by failure tree analysis (FTA)
The monitoring and comparison of signal on monitoring point, can be known in advance whether each functional unit of electric vortex type proximity sensor is in normal
Working condition.Fault detection rate can reach maximum.Any function of electric vortex type proximity sensor known to failure tree analysis (FTA)
For unit when breaking down, phenomenon of the failure shows as output abnormality, i.e., output signal when target is away from or approaching sensor
It does not change, therefore the output signal of electric vortex type proximity sensor becomes that self-test is minimum and effective monitoring point.
Technical solution disclosed in the embodiment of the present invention is described in detail above, specific implementation used herein
Example is expounded the principle and embodiment of the embodiment of the present invention, and the explanation of above embodiments is only applicable to help to understand
The principle of the embodiment of the present invention；At the same time, for those skilled in the art is being embodied according to an embodiment of the present invention
There will be changes in mode and application range, in conclusion the content of the present specification should not be construed as to limit of the invention
System.
Claims (2)
1. a kind of electric vortex type proximity sensor On-line self-diagnosis method, which is characterized in that
Include the following steps:
The variation of the distance between target and probe causes the quality factor of probe interior loop to change, and causes the work of oscillating circuit
Make state change, the output signal of the oscillating circuit is after detecting circuit, return difference processing of circuit again through power amplifier generation and target
Output signal between mark and probe under the corresponding original state of distance；When carrying out self-test, self-test control signal works, and deposits
Storage road saves the output signal under original state, and makes far from exciting circuit or connect according to the output signal under the original state
Nearly exciting circuit generates pumping signal, and pumping signal makes the working condition of oscillating circuit generate variation, the output letter of oscillating circuit
Exciter response signal is generated through power amplifier number after detecting circuit, return difference processing of circuit, and logic circuit is by exciter response signal
It is compared with the output signal under original state and generates self-test output signal, complete a self-test.
2. a kind of electric vortex type proximity sensor On-line self-diagnosis circuit, which is characterized in that
Be for measure each functional unit of electric vortex type proximity sensor whether be under normal operating conditions include close to from
The On-line self-diagnosis circuit of inspection and separate self test mode；
The On-line self-diagnosis circuit includes test circuit part and self-checking circuit part；
The test circuit part includes test circuit power supply, oscillating circuit, detecting circuit, return difference circuit and power amplifier electricity
Road, the test circuit power supply are separately connected oscillating circuit, detecting circuit and power amplifier, and the oscillating circuit passes through inspection
Wave circuit is connected to power amplifier all the way, and another way is connected to return difference circuit, the return difference circuit connection to the oscillating circuit；
The self-checking circuit part includes self-checking circuit power supply and swashs with what the self-checking circuit power supply was separately connected
Encourage unit and breakdown judge unit；
The exciting unit is used under the control of self-test control signal, is controlled the working condition of test circuit part,
Keep pumping signal opposite with the output signal under original state comprising described remote far from exciting circuit and close to exciting circuit
It is used to from exciting circuit or close to exciting circuit generate pumping signal when target is close to or away from sensor；
The breakdown judge unit is for that can automatically determine pumping signal direction, together according to the output signal under original state
When exciter response signal is compared with initial state output signal, output is normal or fault-signal, to realize to current vortex
The On-line self-diagnosis function of formula proximity sensor comprising the storage circuit that saved to the output signal under original state and
The logic circuit that exciter response signal is compared with the output signal under original state；
The self-checking circuit power supply is respectively connected to storage circuit, logic circuit, far from exciting circuit and close excitation electricity
Road, the storage circuit are connect with logic circuit, far from exciting circuit and close to exciting circuit respectively, the separate exciting circuit
It is connect respectively with oscillating circuit with close to exciting circuit, the power amplifier is connect with storage circuit and logic circuit respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610695180.9A CN106404034B (en) | 2016-08-21 | 2016-08-21 | A kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610695180.9A CN106404034B (en) | 2016-08-21 | 2016-08-21 | A kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit |
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| CN106404034B true CN106404034B (en) | 2019-11-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106404034B (en) * | 2016-08-21 | 2019-11-29 | 陕西华燕航空仪表有限公司 | A kind of electric vortex type proximity sensor On-line self-diagnosis method and self-checking circuit |
| CN108663973B (en) * | 2018-06-09 | 2023-11-10 | 成都凯天电子股份有限公司 | Multi-path target position distance control device |
| CN109374747B (en) * | 2018-12-25 | 2021-09-07 | 广州广电计量检测股份有限公司 | Detection method and device for vibration flaw detector |
| CN113900870A (en) * | 2021-09-30 | 2022-01-07 | 北京钛方科技有限责任公司 | Online detection device and method, storage medium and control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360263A2 (en) * | 1988-09-22 | 1990-03-28 | Omron Tateisi Electronics Co. | Self-diagnosing proximity switch |
| CN103427816A (en) * | 2012-05-18 | 2013-12-04 | 上海梅山钢铁股份有限公司 | Proximity switch with fault detection function |
| CN205482768U (en) * | 2015-12-07 | 2016-08-17 | 贵州新安航空机械有限责任公司 | Detection circuit for displacement sensor |
| CN106404034A (en) * | 2016-08-21 | 2017-02-15 | 陕西华燕航空仪表有限公司 | Eddy-current-type proximity-sensor online self-checking method and self-checking circuit |
-
2016
- 2016-08-21 CN CN201610695180.9A patent/CN106404034B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360263A2 (en) * | 1988-09-22 | 1990-03-28 | Omron Tateisi Electronics Co. | Self-diagnosing proximity switch |
| CN103427816A (en) * | 2012-05-18 | 2013-12-04 | 上海梅山钢铁股份有限公司 | Proximity switch with fault detection function |
| CN205482768U (en) * | 2015-12-07 | 2016-08-17 | 贵州新安航空机械有限责任公司 | Detection circuit for displacement sensor |
| CN106404034A (en) * | 2016-08-21 | 2017-02-15 | 陕西华燕航空仪表有限公司 | Eddy-current-type proximity-sensor online self-checking method and self-checking circuit |
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| CN106404034A (en) | 2017-02-15 |
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