CN202209999U - Point-type temperature sensitive fiber grating sensing head - Google Patents
Point-type temperature sensitive fiber grating sensing head Download PDFInfo
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- CN202209999U CN202209999U CN2011203591289U CN201120359128U CN202209999U CN 202209999 U CN202209999 U CN 202209999U CN 2011203591289 U CN2011203591289 U CN 2011203591289U CN 201120359128 U CN201120359128 U CN 201120359128U CN 202209999 U CN202209999 U CN 202209999U
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Abstract
The utility model discloses a point-type temperature sensitive fiber grating sensing head, particularly to a distributed optical fiber grating sensing head for temperature detection of a switch contact point of a high voltage switchgear. A grating is carved at the tail end of a tail optical fiber to form a fiber grating, and the fiber grating and the tail optical fiber are integrated; an optical fiber plastic sleeve is sleeved on the tail optical fiber, and the fiber grating is exposed out of the optical fiber plastic sleeve; and a ceramic protection tube with two through ends is sleeved on the fiber grating and provided with a tail end sealed by seal silica gel. The encapsulating structure for the fiber grating sensing head provided by the utility model is simple and practical, can resist high voltage as no metal material is adopted at the encapsulation component, guarantees that the probability of touching the grating is effectively reduced during the encapsulation process, and the damage ratio of the grating is reduced.
Description
Technical field
The present invention relates to a kind of point type sensing head, particularly a kind of distributed fiber grating sensing head that is applied to the low-cost insulation-encapsulated of high-tension switch cabinet based on fiber grating sensing technology.
Background technology
Fiber grating is a photosensitivity of utilizing fiber optic materials; Method through ultraviolet photoetching writes fibre core with incident light coherent field pattern; In fibre core, produce along the axial refractive index cycle property variation of fibre core; Thereby form the phase grating in permanent space, its effect comes down in fibre core, to form (transmission or reflection) wave filter or catoptron of an arrowband.When beamwidth spectral light process fiber grating, the wavelength that satisfies the fiber grating Bragg condition will produce reflection, and remaining wavelength sees through fiber grating and continues transmission.If the temperature at grating place changes, owing to expand with heat and contract with cold, the grating fringe cycle also can be followed temperature variation, and grating cloth loudspeaker lattice wave is long also just and then to be changed.Change through detecting the optical grating reflection light wavelength like this, just can know the temperature variation at grating place.
Fiber-optical grating temperature sensor is a fibre optic temperature sensor of new generation in the world at present; It is little to have good, the anti-thunderbolt of Sefe antiexplosion, anti-strong electromagnetic, electrical insulating property, high precision, volume in light weight, can use wavelength-division multiplex technique in an optical fiber, to be connected in series a plurality of fiber gratings or a plurality of fiber grating easily and be attempted by through beam splitter on the optical fiber and carry out distributed measurement.Therefore, fiber-optical grating temperature sensor is particularly suitable for electric system for temperature sensor reliability height, good insulation preformance, anti-electromagnetic interference (EMI), good reproducibility, response speed is fast, volume is little and price is low requirement.
But fiber grating itself is very fragile, very easily damages, and need encapsulate, and common grating method for packing is very easy to cause fiber grating to damage.At present; Mostly how many fiber-optical grating temperature sensors are that metal tube adds the armouring cable sleeve encapsulation that has metal on the market, can't reach the requirement of insulating property, can not be used for the environment that high-tension switch cabinet etc. is connected with high-tension electricity; And fiber grating itself is very fragile; Very easily damage, common grating method for packing is very easy to cause fiber grating to damage.Before the utility model is made; Publication number is that the Chinese utility model patent of CN2627479 provides a kind of distributed fiber grating encapsulation temperature sensor; It comprises bare optical fibers and bare optical gratings, outside fiber grating, is surrounded by package tube, and the two ends of package tube are provided with the tackifier end socket; The tackifier end socket is stretched out at the two ends of fiber grating, and the outer setting at the package tube two ends has the thin-wall metal ring.Adopt this encapsulation technology to exist the deficiency that can't reach good insulation preformance, anti-electromagnetic interference (EMI).Publication number is the structure that the Chinese utility model patent of CN201203489Y provides a kind of fiber-optic grating sensor, optical fiber and grating is coated in the ceramic body, though solved the problem of no metallization packaged; But the ceramic pipe of employing is for having different inner diameters, and end sealing; So, during encapsulation, can only the end of grating from opening be inserted; So very easily make the grating front end touch ceramic vessel wall, cause the damage of grating, be unfavorable for the batch process of fiber-optical grating temperature sensor; And, adopt common ceramic pipe, when receiving external force and influence, very easily cause breaking of ceramic pipe, thus the damage grating.
Summary of the invention
The utility model purpose is to overcome the deficiency that prior art exists, and provides a kind of insulating property and anti-electromagnetic interference performance good, and easy to operate, can effectively reduce the point type temperature-sensitive optical fiber grating sensing head of fiber grating spoilage.
The technical scheme that realizes the utility model purpose provides a kind of point type temperature-sensitive optical fiber grating sensing head, and the end of optical fiber pigtail engraves grating, processes fiber grating, and fiber grating and optical fiber pigtail are an integral body; An optic fibre plastics casing pipe sleeve is on optical fiber pigtail, and fiber grating is exposed at the outside of optic fibre plastics sleeve pipe; The ceramic protecting pipe of two break-through is enclosed within on the fiber grating, and the end of ceramic protecting pipe is with the sealing silica gel sealing; Each contacted part is bonding with epoxy glue.
The end of optic fibre plastics sleeve pipe and optical fiber pigtail is adhesively fixed through epoxy glue.
After ceramic protecting pipe entangles fiber grating, be enclosed within on the optic fibre plastics sleeve pipe that is with optical fiber pigtail 3～7 millimeters outward again, ceramic protecting pipe and optic fibre plastics sleeve pipe are adhesively fixed through epoxy glue.
Ceramic protecting pipe is with respect to 2 millimeters places of end of plastic optical fiber sleeve pipe one end, with silica gel or 353ND epoxy glue water-stop.
Compared with prior art, the utility model does not have metal parts in the encapsulation of sensing head, therefore, has satisfied the requirement of insulation, anti-electromagnetism; Simultaneously, because ceramic pipe adopts the structure of two ends break-through, during encapsulation, ceramic pipe puts from the fiber grating end; When having reduced operation, the chance that contacts with fiber grating has reduced the spoilage of fiber grating; And this ceramic pipe adopts zirconia ceramics or aluminium oxide ceramics, has effectively improved toughness, bending strength and the wearing quality of ceramic pipe; Better fiber grating is protected, reduced the chance that has contacted with fiber grating when operating, effectively reduce the spoilage of fiber grating.
Description of drawings
Fig. 1 is the structural representation of a kind of point type temperature-sensitive optical fiber grating sensing head of providing of the utility model embodiment;
Wherein: 1, optic fibre plastics sleeve pipe; 2, optical fiber pigtail; 3, epoxy glue; 4, epoxy glue; 5, ceramic protecting pipe 6, fiber grating; 7, fluid sealant.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to accompanying drawing 1, it is the structural representation of a kind of point type temperature-sensitive optical fiber grating sensing head of providing of present embodiment.
Fiber grating 6 is engraved in the end of optical fiber pigtail 2, and fiber grating 6 is an integral body with optical fiber pigtail 2, and optic fibre plastics sleeve pipe 1 is enclosed within on the optical fiber pigtail 2; Fiber grating 6 is exposed at the outside of optic fibre plastics sleeve pipe 1; Bonding, fixing through epoxy glue 3 between optical fiber pigtail 2 and the optic fibre plastics sleeve pipe 1, ceramic protecting pipe 5 is two break-through structure, and there is a through hole centre; It is inserted in from optic fibre plastics sleeve pipe 1 and fiber grating 6 relative ends; Until fiber grating 6 is put, and to make the joint portion length of itself and optic fibre plastics sleeve pipe be 5 millimeters, with epoxy glue 4 that itself and optic fibre plastics sleeve pipe 1 is bonding, fixing then; Ceramic protecting pipe 5 is with respect to 2 millimeters places of end of optic fibre plastics sleeve pipe 1 one ends, with silica gel or 353ND epoxy glue water-stop; At last, at the end of ceramic protecting pipe 5 central through holes, ceramic protecting pipe is sealed with silica gel or 353ND glue 7.
Claims (4)
1. point type temperature-sensitive optical fiber grating sensing head, the end of optical fiber pigtail engraves grating, processes fiber grating, and fiber grating and optical fiber pigtail are an integral body; It is characterized in that: an optic fibre plastics casing pipe sleeve is on optical fiber pigtail, and fiber grating is exposed at the outside of optic fibre plastics sleeve pipe; The ceramic protecting pipe of two break-through is enclosed within on the fiber grating, and the end of ceramic protecting pipe is with the sealing silica gel sealing; The part that respectively is in contact with one another is bonding with epoxy glue.
2. a kind of point type temperature-sensitive optical fiber grating sensing head according to claim 1, it is characterized in that: the end of optic fibre plastics sleeve pipe and optical fiber pigtail is adhesively fixed through epoxy glue.
3. a kind of point type temperature-sensitive optical fiber grating sensing head according to claim 1; It is characterized in that: after ceramic protecting pipe entangles fiber grating; Be enclosed within on the optic fibre plastics sleeve pipe that is with optical fiber pigtail 3～7 millimeters outward again, ceramic protecting pipe and optic fibre plastics sleeve pipe are adhesively fixed through epoxy glue.
4. a kind of point type temperature-sensitive optical fiber grating sensing head according to claim 1 is characterized in that: ceramic protecting pipe is with respect to 2 millimeters places of end of plastic optical fiber sleeve pipe one end, with silica gel or 353ND epoxy glue water-stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203591289U CN202209999U (en) | 2011-09-23 | 2011-09-23 | Point-type temperature sensitive fiber grating sensing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203591289U CN202209999U (en) | 2011-09-23 | 2011-09-23 | Point-type temperature sensitive fiber grating sensing head |
Publications (1)
| Publication Number | Publication Date |
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| CN202209999U true CN202209999U (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203591289U Expired - Lifetime CN202209999U (en) | 2011-09-23 | 2011-09-23 | Point-type temperature sensitive fiber grating sensing head |
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| CN (1) | CN202209999U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928112A (en) * | 2012-11-23 | 2013-02-13 | 天津亿利科能源科技发展股份有限公司 | Temperature monitoring device for offshore platform electric power equipment and monitoring method thereof |
| CN103869417A (en) * | 2014-02-28 | 2014-06-18 | 北京航天时代光电科技有限公司 | High-reliability single mode fiber reflector and preparing method thereof |
| CN104634477A (en) * | 2015-01-23 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | Optical fiber Bragg grating temperature sensor for measuring temperature of dry type air-core reactor and application method of optical fiber Bragg grating temperature sensor |
| CN108088584A (en) * | 2017-12-29 | 2018-05-29 | 长园深瑞继保自动化有限公司 | Reflection-type optical fiber temperature sensor and preparation method thereof |
| CN108225604A (en) * | 2017-12-29 | 2018-06-29 | 长园深瑞继保自动化有限公司 | Optical fiber temperature-measurement sensing head, temperature measuring equipment and temp measuring method |
| CN109631964A (en) * | 2019-01-23 | 2019-04-16 | 安徽理工大学 | A kind of single mode optical fiber sensing probe of the two-parameter multiple groups measuring section of no gelatinization |
| CN111256868A (en) * | 2019-12-13 | 2020-06-09 | 中复神鹰碳纤维有限责任公司 | Pipeline fluid temperature sensor based on fiber bragg grating |
| CN113899466A (en) * | 2021-06-16 | 2022-01-07 | 宁夏京能宁东发电有限责任公司 | Optical fiber temperature measuring probe fixing and heat transfer device |
-
2011
- 2011-09-23 CN CN2011203591289U patent/CN202209999U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928112A (en) * | 2012-11-23 | 2013-02-13 | 天津亿利科能源科技发展股份有限公司 | Temperature monitoring device for offshore platform electric power equipment and monitoring method thereof |
| CN103869417A (en) * | 2014-02-28 | 2014-06-18 | 北京航天时代光电科技有限公司 | High-reliability single mode fiber reflector and preparing method thereof |
| CN103869417B (en) * | 2014-02-28 | 2016-06-01 | 北京航天时代光电科技有限公司 | The single-mode fiber speculum of a kind of high reliability and its preparation method |
| CN104634477A (en) * | 2015-01-23 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | Optical fiber Bragg grating temperature sensor for measuring temperature of dry type air-core reactor and application method of optical fiber Bragg grating temperature sensor |
| CN104634477B (en) * | 2015-01-23 | 2018-03-06 | 云南电网有限责任公司电力科学研究院 | A kind of method that dry-type air-core reactor temperature is measured using Fiber Bragg Grating Temperature sensor |
| CN108088584A (en) * | 2017-12-29 | 2018-05-29 | 长园深瑞继保自动化有限公司 | Reflection-type optical fiber temperature sensor and preparation method thereof |
| CN108225604A (en) * | 2017-12-29 | 2018-06-29 | 长园深瑞继保自动化有限公司 | Optical fiber temperature-measurement sensing head, temperature measuring equipment and temp measuring method |
| CN109631964A (en) * | 2019-01-23 | 2019-04-16 | 安徽理工大学 | A kind of single mode optical fiber sensing probe of the two-parameter multiple groups measuring section of no gelatinization |
| CN111256868A (en) * | 2019-12-13 | 2020-06-09 | 中复神鹰碳纤维有限责任公司 | Pipeline fluid temperature sensor based on fiber bragg grating |
| CN111256868B (en) * | 2019-12-13 | 2023-09-26 | 中复神鹰碳纤维股份有限公司 | Pipeline fluid temperature sensor based on fiber bragg grating |
| CN113899466A (en) * | 2021-06-16 | 2022-01-07 | 宁夏京能宁东发电有限责任公司 | Optical fiber temperature measuring probe fixing and heat transfer device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room b704, building 2, creative industry park, 328 Xinghu street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Suzhou Guangge Technology Co.,Ltd. Address before: Room b704, building 2, creative industry park, 328 Xinghu street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: SUZHOU GUANGGE EQUIPMENT Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120502 |