CN105222883A - Diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe - Google Patents
Diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe Download PDFInfo
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- CN105222883A CN105222883A CN201510702826.7A CN201510702826A CN105222883A CN 105222883 A CN105222883 A CN 105222883A CN 201510702826 A CN201510702826 A CN 201510702826A CN 105222883 A CN105222883 A CN 105222883A
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- 239000000835 fiber Substances 0.000 title claims abstract description 53
- 239000000523 sample Substances 0.000 title claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 62
- 238000000576 coating method Methods 0.000 claims abstract description 62
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
- 238000002310 reflectometry Methods 0.000 claims abstract description 8
- 239000010453 quartz Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 230000004044 response Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Abstract
The invention discloses a kind of diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe, it comprises stop sleeve, fiber stub fabricated section, the fiber stub in stop sleeve is arranged on by fiber stub fabricated section, be arranged on the optical fiber in fiber stub optical fiber mounting hole, the front end of fiber stub is coated with the first reflectance coating, first reflectance coating of fiber stub front end is positioned at stop sleeve inside, the front end of stop sleeve is fixed with the second reflectance coating, second reflectance coating has identical reflectivity with the first reflectance coating, second reflectance coating forms Fa-Po cavity with the fiber stub being coated with the first reflectance coating.The present invention makes extrinsic Fabry-Perot sensor obtain higher response frequency while adopting more diaphragm, and sensor detection sensitivity is put in raising office, and the manufacture craft of this probe is simply easy to the experimental study stage carries out sensor trial-production.
Description
Technical field
The present invention relates to fiber optic sensor technology field, refer to a kind of diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe particularly.
Background technology
Large scale electrical power unit on-line PD monitoring is the difficult problem of puzzlement power operation unit always, and scholar and industry member slip-stick artist attempt solving this problem in different ways for many years.Wherein rely on detection office to put to bring out ultrasonic signal method and receive publicity always, traditional type local-discharge ultrasonic ripple detects based on piezoceramic transducer, but because of the reasons such as its examined on-the-spot strong electromagnetic environmental interference is serious restriction, also fails widespread use and industry spot.Development along with fiber optic sensor technology in nearly 30 years, numerous researchers find that the extrinsic optical fiber Fabry-Perot ultrasonic sensor of diaphragm manifold type is expected to the office's sound reproduction ripple on-line monitoring for solving in liquid-solid composite insulation.Extrinsic optical fiber Fabry-Perot ultrasonic sensor can utilize the fiber stub that is coated with reflectance coating and diaphragm to make Fabry-Perot sensor and pop one's head in.Office puts detecting sensor and requires to have higher static pressure sensitivity, require that there is higher response frequency simultaneously, and fiber stub diameter is 2.5mm, directly adopt the Fa-Po of support structure configuration probe often to need thicker diaphragm, and comparatively thick film sector-meeting reduce the sensitivity of sensor static pressure.
Summary of the invention
Object of the present invention will provide a kind of diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe exactly, this probe can make extrinsic Fabry-Perot sensor obtain higher response frequency while adopting more diaphragm, sensor detection sensitivity is put in raising office, and the manufacture craft of this probe is simply easy to the experimental study stage carries out sensor trial-production.
For realizing this object, diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe designed by the present invention, it comprises stop sleeve, fiber stub fabricated section, the fiber stub in stop sleeve is arranged on by fiber stub fabricated section, be arranged on the optical fiber in fiber stub optical fiber mounting hole, the front end of described fiber stub is coated with the first reflectance coating, first reflectance coating of fiber stub front end is positioned at stop sleeve inside, it is characterized in that: the front end of described stop sleeve is fixed with the second reflectance coating, described second reflectance coating has identical reflectivity with the first reflectance coating, described second reflectance coating forms Fa-Po cavity with the fiber stub being coated with the first reflectance coating, distance range between described second reflectance coating and the first reflectance coating is 175 ~ 185 microns.
The reflectivity of described first reflectance coating and the second reflectance coating is 50%.
Described first reflectance coating and the second reflectance coating are quartz diaphragm.
The thickness of described first reflectance coating and the second reflectance coating is equal, is 35 ~ 45 microns.
Described second reflectance coating is fixed on the front end of stop sleeve by constraint annulus.
The thickness range of described constraint annulus is 0.5 ~ 0.9mm.
Beneficial effect of the present invention:
The increase of quartz diaphragm with thickness and the reduction of about beam radius, its natural frequency increases, sensitivity decrease, the present invention is by the design of sandwich construction in above-mentioned extrinsic Fabry-Perot sensor, when making employing thinner quartz diaphragm, sensor can obtain the intrinsic response frequency of higher single order, thus improves Fabry-Perot sensor and to raise one's voice to its utmost the detection sensitivity that transmits to the office with upper frequency.And the manufacture craft of this probe is simple, being easy to the experimental study stage carries out sensor trial-production.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 adopts the office of the sensor of the present invention's probe to put testing result figure;
Fig. 3 is that testing result figure is put in the office that traditional change diaphragm thickness mode makes the sensor of probe;
Fig. 4 is the natural frequency cloud atlas of the sensor diaphragm not adopting structure of the present invention;
Fig. 5 is the sensor diaphragm deformation cloud atlas not adopting invention structure;
Fig. 6 is the natural frequency cloud atlas of the sensor diaphragm adopting invention structure;
Fig. 7 is the sensor diaphragm deformation cloud atlas adopting invention structure;
Wherein, 1-stop sleeve, 2-fiber stub fabricated section, 3-fiber stub, 4-optical fiber, the 5-the first reflectance coating, the 6-the second reflectance coating, 7-constraint annulus.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Diaphragm manifold type of the present invention extrinsic Fiber Optic Sensor FP sensor probe, as shown in Figure 1, it comprises stop sleeve 1, fiber stub fabricated section 2, the fiber stub 3 in stop sleeve 1 is arranged on by fiber stub fabricated section 2, be arranged on the optical fiber 4 in fiber stub 3 optical fiber mounting hole, the front end of described fiber stub 3 is coated with the first reflectance coating 5, first reflectance coating 5 of fiber stub 3 front end is positioned at stop sleeve 1 inside, the front end of described stop sleeve 1 is fixed with the second reflectance coating 6, described second reflectance coating 6 has identical reflectivity with the first reflectance coating 5, thus obtain the working sensor curve with Geng great linear modulation district, described second reflectance coating 6 forms Fa-Po cavity with the fiber stub 3 being coated with the first reflectance coating 5, distance range between described second reflectance coating 6 and the first reflectance coating 5 is 175 ~ 185 microns, be preferably 180 microns.
In technique scheme, the reflectivity of described first reflectance coating 5 and the second reflectance coating 6 is 50%.The reflectivity of 50% can obtain larger measured signal modulator zone, ensure that sensitivity.
In technique scheme, described first reflectance coating 5 and the second reflectance coating 6 are quartz diaphragm.Quartz diaphragm is convenient to processing at industrial circle and is obtained.
In technique scheme, the thickness of described first reflectance coating 5 and the second reflectance coating 6 is equal, is 35 ~ 45 microns, is preferably 40 microns.This thickness range can ensure the sensitivity of popping one's head in.
In technique scheme, described second reflectance coating 6 is fixed on the front end of stop sleeve 1 by constraint annulus 7.The thickness range of described constraint annulus 7 is 0.5 ~ 0.9mm, is preferably 0.8mm.Above-mentioned constraint annulus 7 can make the present invention obtain higher response frequency (theoretical according to Elasticity diaphragm vibration, setting up small size constraints annulus 7 can improve response frequency).
In technique scheme, described stop sleeve 1, fiber stub fabricated section 2, fiber stub 3, first reflectance coating 5 and the second reflectance coating 6 are coaxial setting.The form of above-mentioned coaxial setting can improve the coupling efficiency of light beam.
Adopting the improvement effect of sensor probe response frequency of the present invention for evaluating, utilizing computing machine finite element method to calculate diaphragm deformation under diaphragm natural frequency and standard effect of stress.Fig. 4 is the natural frequency cloud atlas of the sensor diaphragm not adopting structure of the present invention, Fig. 5 is the sensor diaphragm deformation cloud atlas not adopting invention structure, can find out that from Fig. 4 and Fig. 5 the first natural frequency of the sensor diaphragm not adopting invention structure is 110kHz, its center displacement is 0.386 × 10
-10m/Pa; Fig. 6 is the natural frequency cloud atlas of the sensor diaphragm adopting invention structure, Fig. 7 is the sensor diaphragm deformation cloud atlas adopting invention structure, the first natural frequency can finding out the sensor diaphragm adopting invention structure from Fig. 6 and Fig. 7 is 224kHz, and its center displacement is 0.122 × 10
-10m/Pa.The present invention can obtain the intrinsic response frequency of higher single order as can be seen here, the detection sensitivity of raising one's voice to its utmost to transmit thus raising Fabry-Perot sensor is played a game.
In order to further verify effect of the present invention, design following test experience, plate-plate electrode is utilized to put source as office, office's sound reproduction signal for identical discharge capacity utilizes the sensors A with identical natural frequency and sensor B to detect respectively, wherein the probe of sensors A adopts structure of the present invention, sensor B is not adopted structure of the present invention and is made by traditional change diaphragm thickness mode, Fig. 2 is that the sound reproduction of sensors A office transmits testing result, and Fig. 3 is that the sound reproduction of sensor B office transmits testing result.Sensors A shows the testing result of identical discharge source with sensor B, and the output amplitude of sensors A is higher than the output amplitude of sensor B, and the sandwich design that the present invention adopts improves sensing general ability and puts detection sensitivity.
Principle of work of the present invention is: fundamental purpose of the present invention proposes a kind of extrinsic optical fiber Fabry-Perot sensor with the diaphragm manifold type of sandwich construction.Office puts and brings out ultrasonic signal through the vibration of liquid medium propagation arrival sensor probe place driving quartz diaphragm, the reflectance spectrum of sensor produces phase offset with diaphragm vibration, and the mobile size of spectrum and the intensity of frequency and tested ultrasonic signal and frequency are proportionate, and can realize the detection of measured signal.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (8)
1. a diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe, it comprises stop sleeve (1), fiber stub fabricated section (2), the fiber stub (3) in stop sleeve (1) is arranged on by fiber stub fabricated section (2), be arranged on the optical fiber (4) in fiber stub (3) optical fiber mounting hole, the front end of described fiber stub (3) is coated with the first reflectance coating (5), first reflectance coating (5) of fiber stub (3) front end is positioned at stop sleeve (1) inside, it is characterized in that: the front end of described stop sleeve (1) is fixed with the second reflectance coating (6), described second reflectance coating (6) has identical reflectivity with the first reflectance coating (5), described second reflectance coating (6) forms Fa-Po cavity with the fiber stub (3) being coated with the first reflectance coating (5).
2. diaphragm manifold type according to claim 1 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: the distance range between described second reflectance coating (6) and the first reflectance coating (5) is 175 ~ 185 microns.
3. diaphragm manifold type according to claim 1 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: the reflectivity of described first reflectance coating (5) and the second reflectance coating (6) is 50%.
4. the diaphragm manifold type extrinsic Fiber Optic Sensor FP sensor probe according to claim 1 or 2 or 3, is characterized in that: described first reflectance coating (5) and the second reflectance coating (6) are quartz diaphragm.
5. diaphragm manifold type according to claim 4 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: the thickness of described first reflectance coating (5) and the second reflectance coating (6) is equal, is 35 ~ 45 microns.
6. diaphragm manifold type according to claim 1 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: described second reflectance coating (6) is fixed on the front end of stop sleeve (1) by constraint annulus (7).
7. diaphragm manifold type according to claim 6 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: the thickness range of described constraint annulus (7) is 0.5 ~ 0.9mm.
8. diaphragm manifold type according to claim 1 extrinsic Fiber Optic Sensor FP sensor probe, is characterized in that: described stop sleeve (1), fiber stub fabricated section (2), fiber stub (3), the first reflectance coating (5) and the second reflectance coating (6) are coaxial setting.
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| CN201510702826.7A CN105222883B (en) | 2015-10-26 | 2015-10-26 | The extrinsic optical fiber Fabry Perot sensor probe of diaphragm manifold type |
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| CN201510702826.7A CN105222883B (en) | 2015-10-26 | 2015-10-26 | The extrinsic optical fiber Fabry Perot sensor probe of diaphragm manifold type |
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| CN105222883B CN105222883B (en) | 2018-03-27 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675114A (en) * | 2016-01-08 | 2016-06-15 | 杨志强 | Optical fiber EFPI ultrasonic sensor |
| CN105737966A (en) * | 2016-04-16 | 2016-07-06 | 西北大学 | Fabry-Perot cavity gold foil fiber ultrasonic sensor |
| CN106644039A (en) * | 2017-01-20 | 2017-05-10 | 哈尔滨工业大学 | Optical fiber mini-sized hydrophone |
| CN106959153A (en) * | 2016-01-08 | 2017-07-18 | 杨志强 | The preparation method of temperature self-compensation type optical fiber EFPI ultrasonic sensors |
| CN107942215A (en) * | 2017-12-20 | 2018-04-20 | 哈尔滨理工大学 | The extrinsic fabry perot fiber optic sensor of external attaching type and test platform |
| CN108181515A (en) * | 2017-11-10 | 2018-06-19 | 黄辉 | A kind of optical fiber electromagnetic sensor and preparation method thereof |
| CN109709453A (en) * | 2018-12-27 | 2019-05-03 | 广东电网有限责任公司佛山供电局 | A kind of ultraviolet light ultrasonic wave composite arc discharging detecting system |
| CN110057439A (en) * | 2019-05-15 | 2019-07-26 | 北京航空航天大学 | A kind of low quick sensing device of resonance eccentric core fiber sound based on F-P interference |
| CN113884841A (en) * | 2021-11-05 | 2022-01-04 | 全球能源互联网研究院有限公司 | Diaphragm type partial discharge sensor and manufacturing method thereof |
| CN117723917A (en) * | 2024-02-07 | 2024-03-19 | 国网山西省电力公司太原供电公司 | Monitoring application method based on optical fiber extrinsic Fabry-Perot type ultrasonic sensor |
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Patent Citations (6)
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| JPH01316616A (en) * | 1988-06-17 | 1989-12-21 | Matsushita Electric Ind Co Ltd | Controller for operating point of fabry-perot interferometer type optical sensor and optical sensor using said controller |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675114A (en) * | 2016-01-08 | 2016-06-15 | 杨志强 | Optical fiber EFPI ultrasonic sensor |
| CN106959153A (en) * | 2016-01-08 | 2017-07-18 | 杨志强 | The preparation method of temperature self-compensation type optical fiber EFPI ultrasonic sensors |
| CN105737966A (en) * | 2016-04-16 | 2016-07-06 | 西北大学 | Fabry-Perot cavity gold foil fiber ultrasonic sensor |
| CN106644039A (en) * | 2017-01-20 | 2017-05-10 | 哈尔滨工业大学 | Optical fiber mini-sized hydrophone |
| CN108181515A (en) * | 2017-11-10 | 2018-06-19 | 黄辉 | A kind of optical fiber electromagnetic sensor and preparation method thereof |
| CN108181515B (en) * | 2017-11-10 | 2020-07-21 | 黄辉 | Optical fiber electromagnetic sensor and preparation method thereof |
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| CN109709453A (en) * | 2018-12-27 | 2019-05-03 | 广东电网有限责任公司佛山供电局 | A kind of ultraviolet light ultrasonic wave composite arc discharging detecting system |
| CN110057439A (en) * | 2019-05-15 | 2019-07-26 | 北京航空航天大学 | A kind of low quick sensing device of resonance eccentric core fiber sound based on F-P interference |
| CN113884841A (en) * | 2021-11-05 | 2022-01-04 | 全球能源互联网研究院有限公司 | Diaphragm type partial discharge sensor and manufacturing method thereof |
| CN117723917A (en) * | 2024-02-07 | 2024-03-19 | 国网山西省电力公司太原供电公司 | Monitoring application method based on optical fiber extrinsic Fabry-Perot type ultrasonic sensor |
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