CN106404034A - Eddy-current-type proximity-sensor online self-checking method and self-checking circuit - Google Patents
Eddy-current-type proximity-sensor online self-checking method and self-checking circuit Download PDFInfo
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- CN106404034A CN106404034A CN201610695180.9A CN201610695180A CN106404034A CN 106404034 A CN106404034 A CN 106404034A CN 201610695180 A CN201610695180 A CN 201610695180A CN 106404034 A CN106404034 A CN 106404034A
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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
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Abstract
The invention provides an eddy-current-type proximity-sensor online self-checking method and a self-checking circuit. An online self-checking circuit with approach self-checking and far-away self-checking modes used for testing whether each function unit of an eddy-current-type proximity sensor is under a normal operating condition is included. The online self-checking circuit comprises a test circuit portion and a self-checking circuit portion. According to the online self-checking circuit, a condition that a circuit signal of the test circuit portion generates a difference with an output signal under an original state when a distance between a target and a probe changes is determined so as to complete self-checking. The test circuit portion comprises a test circuit power supply, an oscillating circuit, a demodulation circuit, a return difference circuit and a power amplifier circuit. The self-checking circuit portion comprises a self-checking circuit power supply, an excitation unit and a fault determination unit, wherein the excitation unit and the fault determination unit are connected to the self-checking circuit power supply respectively. By using the online self-checking circuit, the structure is simple, the self-checking method is easy to realized, high reliability is possessed and simultaneously a good self-checking effect is possessed too.
Description
Technical field
The present invention relates to current vortex field of sensing technologies is and in particular to a kind of electric vortex type proximity transducer On-line self-diagnosis side
Method and self-checking circuit.
Background technology
Electric vortex type is a kind of sensor being operated using eddy current effect close to sensing, because its structure is simple,
Sensitivity height, frequency response range width, do not affected by media such as greasy dirts, so non-cpntact measurement can be carried out, applied range,
Just it has been taken seriously since appearance, be widely used in Non-Electricity Measurements such as position, displacement, vibration, thickness, rotating speed, hardness and lossless
The fields such as flaw detection.Electric vortex type proximity transducer is the important composition portion of Aircraft landing gear system and door-down switch monitoring system
Point, require to improve constantly with aeroplane performance, electric vortex type proximity transducer is fitted in safety, reliability, economy, environment
The aspects such as Ying Xing propose tightened up requirement.External electric vortex type proximity transducer has been used for rising of commercial and military aircraft
Fall frame, flight controller, thrust reverser and bay door system.At present, the hatch door of domestic dual-use aircraft and undercarriage
System mainly adopts contact stroke sensor, and contact stroke sensor haves such problems as short life and poor reliability, therefore
It is inexorable trend that electric vortex type proximity transducer 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 carry
Rise, the complication of system, synthesization, intelligence degree also improve constantly, such as how more economical mode meets aircraft utilization
Efficiency and quick, accurate, lasting supportability demand, fault diagnosis, prognostics and health management technology obtain increasing
Pay attention to and apply.Its each systematic parameter is acquired be that it carries out the necessary bar of fault diagnosis and health control using sensor
Part, and the health status of sensor itself check whether self-inspection is then applied to the fault diagnosis of system and health control
Can play a role and play vital effect, the self-inspection of therefore sensor be system fault diagnosis with health management system arranged
The part of segmentation.Electric vortex type proximity transducer wouldn't possess On-line self-diagnosis function at present, goes out in electric vortex type proximity transducer
In the case of existing fault, most basic inspection method is to pull down it from system, individually it is energized, using target away from or
Proximity transducer observes whether sensor output signal meets technical requirements simultaneously, and the method for this hand inspection fault is on the one hand
Waste of manpower and material resources, on the other hand this method cannot execute at all in most cases.Complicated journey with system
Benefit of subsisting increases, and the testability of sensor and maintainability will be faced with formidable challenges.Hinder electric vortex type proximity transducer to exist
The application of aviation field and popularization.
Content of the invention
In view of this, the main object of the present invention is the problem that can not carry out self-inspection according to electric vortex type proximity transducer,
Provide one kind and electric vortex type proximity transducer On-line self-diagnosis method and self-checking circuit are realized by hardware circuit.
In order to achieve the above object, the invention discloses a kind of method of electric vortex type proximity transducer On-line self-diagnosis, wrap
Include following steps：
The quality factor that target causes probe interior loop with the distance between probe change change, and cause oscillating circuit
Working condition change, the output signal of this oscillating circuit produces through power amplifier after detecting circuit, return difference processing of circuit again
Output signal under the corresponding original state of distance between target and probe；When carrying out self-inspection, self-inspection control signal acts as
With storage circuit preserves the output signal under original state, and is made away from excitation electricity according to the output signal under this original state
Road or close to exciting circuit produce pumping signal, pumping signal make oscillating circuit working condition produce change, oscillating circuit
Output signal produces exciter response signal through power amplifier after detecting circuit, return difference processing of circuit, and logic circuit will encourage sound
Output signal under induction signal and original state is compared and is produced self-inspection output signal, completes a self-inspection.
A kind of electric vortex type proximity transducer On-line self-diagnosis circuit, is for measuring each function of electric vortex type proximity transducer
Whether unit is in the On-line self-diagnosis circuit including close to self-inspection with away from self test mode under normal operating conditions；
Described On-line self-diagnosis circuit includes test circuit part and self-checking circuit part；
Described test circuit part includes test circuit power supply, oscillating circuit, detecting circuit, return difference circuit and power amplifier
Circuit, described test circuit power supply connects oscillating circuit, detecting circuit and power amplifier respectively, and described oscillating circuit passes through
Detecting circuit one tunnel connects to power amplifier, and another road connects to return difference circuit, and this return difference circuit connects to described oscillating circuit；
Described self-checking circuit part is included self-checking circuit power supply and is connected respectively with this self-checking circuit power supply
Exciting unit and breakdown judge unit；
Described exciting unit is used under the control of self-inspection control signal, and the working condition of test circuit part is controlled
System, makes pumping signal contrary with the output signal under original state, it includes away from exciting circuit with close to exciting circuit, described
It is used for when target is close to or away from sensor producing pumping signal away from exciting circuit or close to exciting circuit；
Described breakdown judge unit is used for automatically determine pumping signal side according to the output signal under original state
To exciter response signal and initial state output signal being contrasted, output is normal or fault-signal, to realize to electricity simultaneously
The On-line self-diagnosis function of vortex type proximity sensor, it includes the storage circuit that the output signal under original state is preserved
And the logic circuit that the output signal under exciter response signal and original state compares.
Further, described self-checking circuit power supply be respectively connecting to storage circuit, logic circuit, away from exciting circuit
And close to exciting circuit, described storage circuit is connected with logic circuit, away from exciting circuit and close to exciting circuit respectively, described
Be connected with oscillating circuit respectively away from exciting circuit with close to exciting circuit, described power amplifier respectively with storage circuit and logic
Circuit connects.
Beneficial effects of the present invention are：The electric vortex type proximity transducer On-line self-diagnosis method structure that invention provides is simple,
It is easily achieved, there is high reliability, there is good Autonomous test effect simultaneously, fault detect rate reaches more than 80 percent,
Solve the technical problem that electric vortex type proximity transducer can not carry out self-inspection, there is very huge practical value and economic valency
Value.
Brief description
Fig. 1 is the circuit theory diagrams of the present invention；
Fig. 2 is the circuit diagram of the present invention.
Wherein, the title of various pieces and mark are as follows：
1- test circuit part, 2- pops one's head in, 3- target, 4- self-checking circuit part, 5- self-inspection 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 supplies
Power supply, 4.2- storage circuit, away from exciting circuit, close to exciting circuit, 4.5- logic circuit, 4.6 self-inspections are defeated for 4.4- for 4.3-
Go out signal.
Specific embodiment
To describe the present invention, the illustrative examples of the here present invention below in conjunction with accompanying drawing and specific embodiment in detail
And explanation is used for explaining the present invention, but not as a limitation of the invention.
With reference to Fig. 1 and Fig. 2, the invention discloses a kind of method of electric vortex type proximity transducer On-line self-diagnosis, including such as
Lower step：
The quality factor that target 3 causes probe 2 interior loop with the distance between probe 2 change change, and cause vibration
The working condition of circuit 1.3 changes, after the output signal of this oscillating circuit 1.3 is processed through detecting circuit 1.4, return difference circuit 1.5
Produce the output signal under the corresponding original state of distance between target 3 and probe 2 through power amplifier 1.6 again；Carrying out certainly
During inspection, self-inspection control signal 5 works, and storage circuit 4.2 preserves the output signal under original state, and according to this original state
Under output signal make away from exciting circuit 4.3 or close to exciting circuit 4.4 produce pumping signal, this pumping signal make vibration electricity
The working condition on road 1.3 produces change, the output signal of described oscillating circuit 1.3 through detecting circuit 1.4, return difference circuit 1.5 at
Exciter response signal is produced through power amplifier 1.6, logic circuit 4.5 is by the output under exciter response signal and original state after reason
Signal is compared and is produced self-inspection output signal 6, completes a self-inspection.
A kind of electric vortex type proximity transducer On-line self-diagnosis circuit, is for measuring each function of electric vortex type proximity transducer
Whether unit is in the On-line self-diagnosis circuit including close to self-inspection with away from self test mode under normal operating conditions；
Described On-line self-diagnosis circuit includes test circuit part 1 and self-checking circuit part 4；
Described 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, described test circuit power supply 1.1 connect respectively oscillating circuit 1.3, detecting circuit 1.4 and
Power amplifier 1.6, described oscillating circuit 1.3 is connected to power amplifier 1.6 by detecting circuit 1.4 1 tunnel, another road connect to
Return difference circuit 1.5, this return difference circuit 1.5 connects to described oscillating circuit 1.3；
Described self-checking circuit part 4 include self-checking circuit power supply 4.1 and with 4.1 points of this self-checking circuit power supply
The not exciting unit of connection and breakdown judge unit；
Described exciting unit is used under the control of self-inspection control signal 5, and the working condition of test circuit part is carried out
Control, make pumping signal contrary with the output signal under original state, it is included away from exciting circuit 4.3 with close to exciting circuit
4.4, described away from exciting circuit 4.3 or close to exciting circuit 4.4 be used for when target 3 is close to or away from sensor produce excitation
Signal；
Described breakdown judge unit is used for automatically determine pumping signal side according to the output signal under original state
To exciter response signal and initial state output signal being contrasted, output is normal or fault-signal, to realize to electricity simultaneously
The On-line self-diagnosis function of vortex type proximity sensor, it includes the storage circuit that the output signal under original state is preserved
4.2 and logic circuit 4.5 that the output signal under exciter response signal and original state is compared.
Described self-checking circuit power supply 4.1 be respectively connecting to storage circuit 4.2, logic circuit 4.5, away from exciting circuit
4.3 and close to exciting circuit 4.4, described storage circuit 4.2 respectively with logic circuit 4.5, away from exciting circuit 4.3 and close to swashing
Encourage circuit 4.4 to connect, described be connected with oscillating circuit 1.3 respectively away from exciting circuit 4.3 with close to exciting circuit 4.4, described
Power amplifier 1.6 is connected with storage circuit 4.2 and logic circuit 4.5 respectively.
The present invention is according to electric vortex type proximity transducer measuring circuit principle, sets up electric vortex type proximity transducer abnormal
Fault tree, by fault tree analysiss, has obtained the minimum and effective malfunction monitoring point of electric vortex type proximity transducer, by right
The monitoring of signal and contrast on monitoring point, can be known a priori by whether each functional unit of electric vortex type proximity transducer is in normally
Working condition.Fault detect rate can reach maximum.Understand any function of electric vortex type proximity transducer by fault tree analysiss
When breaking down, its phenomenon of the failure all shows as output abnormality to unit, that is, target away from or output signal during proximity transducer
Do not change, the output signal of therefore electric vortex type proximity transducer becomes the minimum and effective monitoring point of self-inspection.
Above the technical scheme disclosed in the embodiment of the present invention is described in detail, used herein is embodied as
Example is set forth to the principle of the embodiment of the present invention and embodiment, and the explanation of above example is only applicable to help understand
The principle of the embodiment of the present invention；Simultaneously for one of ordinary skill in the art, according to the embodiment of the present invention, it is being embodied as
All will change in mode and range of application, in sum, this specification content should not be construed as the limit to the present invention
System.
Claims (3)
1. a kind of electric vortex type proximity transducer On-line self-diagnosis method it is characterised in that
Comprise the steps：
The quality factor that target causes probe interior loop with the distance between probe change change, and cause the work of oscillating circuit
Make state change, the output signal of this oscillating circuit produces and target through power amplifier after detecting circuit, return difference processing of circuit again
Output signal under the corresponding original state of distance between mark and probe；When carrying out self-inspection, self-inspection control signal works, and deposits
Storing up electricity road preserves the output signal under original state, and is made away from exciting circuit according to the output signal under this original state or connect
Nearly exciting circuit produces pumping signal, and pumping signal makes the working condition of oscillating circuit produce change, the output letter of oscillating circuit
Produce exciter response signal through power amplifier number after detecting circuit, return difference processing of circuit, logic circuit is by exciter response signal
Compare with the output signal under original state and produce self-inspection output signal, complete a self-inspection.
2. a kind of electric vortex type proximity transducer On-line self-diagnosis circuit it is characterised in that
It is for measuring whether each functional unit of electric vortex type proximity transducer is in including close to certainly under normal operating conditions
Inspection and the On-line self-diagnosis circuit away from self test mode；
Described On-line self-diagnosis circuit includes test circuit part and self-checking circuit part；
Described test circuit part includes test circuit power supply, oscillating circuit, detecting circuit, return difference circuit and power amplifier electricity
Road, described test circuit power supply connects oscillating circuit, detecting circuit and power amplifier respectively, and described oscillating circuit passes through inspection
Wave circuit one tunnel connects to power amplifier, and another road connects to return difference circuit, and this return difference circuit connects to described oscillating circuit；
Described self-checking circuit part include self-checking circuit power supply and with this self-checking circuit power supply be connected respectively swash
Encourage unit and breakdown judge unit；
Described exciting unit is used under the control of self-inspection control signal, and the working condition of test circuit part is controlled,
Make pumping signal contrary with the output signal under original state, it includes away from exciting circuit with close to exciting circuit, described remote
It is used for when target is close to or away from sensor producing pumping signal from exciting circuit or close to exciting circuit；
Described breakdown judge unit is used for automatically determine pumping signal direction according to the output signal under original state, with
When exciter response signal and initial state output signal are contrasted, output is normal or fault-signal, to realize to current vortex
The On-line self-diagnosis function of formula proximity transducer, it include the storage circuit that the output signal under original state is preserved and
The logic circuit that output signal under exciter response signal and original state is compared.
3. electric vortex type proximity transducer On-line self-diagnosis circuit according to claim 2 is it is characterised in that described self-inspection is electric
Road power supply be respectively connecting to storage circuit, logic circuit, away from exciting circuit and close to exciting circuit, described storage circuit
Be connected with logic circuit, away from exciting circuit and close to exciting circuit respectively, described away from exciting circuit with close to exciting circuit
It is connected with oscillating circuit respectively, described power amplifier is connected with storage circuit and logic circuit respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 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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| CN106404034A true CN106404034A (en) | 2017-02-15 |
| CN106404034B CN106404034B (en) | 2019-11-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663973A (en) * | 2018-06-09 | 2018-10-16 | 成都凯天电子股份有限公司 | Multichannel target position distance control device |
| CN109374747A (en) * | 2018-12-25 | 2019-02-22 | 广州广电计量检测股份有限公司 | Vibrate defectoscope detection method and device |
| 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 |
| 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 |
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| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-08-21 CN CN201610695180.9A patent/CN106404034B/en active Active
Patent Citations (3)
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108663973A (en) * | 2018-06-09 | 2018-10-16 | 成都凯天电子股份有限公司 | Multichannel target position distance control device |
| 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 |
| CN109374747A (en) * | 2018-12-25 | 2019-02-22 | 广州广电计量检测股份有限公司 | Vibrate defectoscope detection method and 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 |
| CN113900870B (en) * | 2021-09-30 | 2024-05-07 | 北京钛方科技有限责任公司 | Online detection device, online detection method, storage medium and control device |
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| CN106404034B (en) | 2019-11-29 |
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