CN201488836U - Sensing optical cable for detecting strain and temperature - Google Patents
Sensing optical cable for detecting strain and temperature Download PDFInfo
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- CN201488836U CN201488836U CN2009201425338U CN200920142533U CN201488836U CN 201488836 U CN201488836 U CN 201488836U CN 2009201425338 U CN2009201425338 U CN 2009201425338U CN 200920142533 U CN200920142533 U CN 200920142533U CN 201488836 U CN201488836 U CN 201488836U
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Abstract
The utility model relates to a sensing optical cable for detecting strain and temperature, which comprises a silicone rubber protective layer, at least one compound optical fiber used for sensing temperature and strain changes simultaneously and inserted in the silicone rubber protective layer, a hose optical fiber unit used for sensing temperature changes and inserted in the silicone rubber proteictive layer, and a sheathing layer coating the periphery of the silicone rubber protective layer, wherein the hose optical fiber unit comprises a metallic hose and at least one temperature sensing optical fiber arranged in the metallic hose; the strain-temperature value detected through the compound optical fiber is compensated by temperature value detected by the hose optical fiber unit to obtain strain force value in detection, therefore, the sensing optical cable is particularly suitable for fire detection, low-temperature vessel and high-temperature pipeine detection, thermal system remote control and steam-driven generator monitoring, and is applicable to an aerospace system, an avionic system, a nuclear device and other military systems.
Description
Technical field
The utility model relates to a kind of sensing optic cable.
Background technology
In recent years, utilize the distributed optical fiber sensing system of optical time domain reflection (OTDR) technology to obtain development rapidly.Wherein utilize the susceptibility of Brillouin scattering, make the favor that sensing positioning system is subjected to a lot of high-tech companies strain and temperature.When transmitting in the Brillouin scattering feeding single-mode fiber, because optical fiber is subjected to stress or temperature variation, the Brillouin scattering in the optical fiber will produce frequency displacement, by the analyzing and processing to frequency shift amount, can calculate the strained and Temperature numerical of optical fiber.The strain precision that reasonable distributive fiber optic strain and temperature sensing measuring system are measured in the prior art can reach 20 μ ε (0.002%), temperature accuracy can reach 1 ℃, measuring distance reaches 50Km, can be used for the occasions such as security monitoring of facilities such as bridge, dam, oil and gas pipes, tunnel, warehouse and power circuit.
But because Brillouin scattering is simultaneously to strain and responsive to temperature, the optical cable that composite fiber constituted by existing temperature sensor simultaneously and strain, it is owing to be subjected to the influence of temperature sense, can not accurately measure strain numerical value, the utility model just is being based on the technological improvement of making under the above-mentioned background.
The utility model content
The utility model purpose is exactly that a kind of sensing optic cable that can obtain the strain measurement value more accurately is provided in order to overcome the deficiencies in the prior art.
In order to reach the foregoing invention purpose; the technical solution of the utility model is: a kind of sensing optic cable that is used for strain and temperature detection; it comprises the silicon rubber protective seam; be plugged at least one composite fiber that is used for while temperature sensor and STRESS VARIATION in the described silicon rubber protective seam; be plugged in the flexible pipe fiber unit that temperature sensor changes that is used in the described silicon rubber protective seam; be coated on the restrictive coating of described silicon rubber protective seam periphery; described flexible pipe fiber unit comprises metal hose; be arranged at least one temperature sense optical fiber in the described metal hose; when detecting, thus strain-Temperature numerical of measuring by composite fiber and do compensation with the Temperature numerical that the flexible pipe fiber unit is measured and obtain required adaptability to changes numerical value.
As to further improvement of the utility model; described restrictive coating comprises the organdy braid that fits tightly with the outer phase of described silicon rubber protective seam, be wrapped in described organdy braid periphery by organdy braiding and the outer jacket that forms with the polyimide resin dip-coating, thereby can make optical cable obtain favorable mechanical and chemoproection effect.
Described composite fiber is 1～4.
Described composite fiber is single-mode fiber or multimode optical fiber.
As another further technological improvement of the present utility model, described every temperature sense optical fiber comprises fibre core, is coated on fibre cladding, carbon sealant and the polyimide coating of described fibre core periphery successively.The coating of carbon sealant can make optical fiber not be subjected to the erosion of moisture, but thereby the serviceable life of extended fiber, and can guarantee that at the outermost layer coating polyimide optical cable can carry out work under extreme temperature environment, thereby can make that application scenario of the present utility model obtains promoting.
Described metal hose is formed by sheet metal phase helically coiling.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage: because the flexible pipe fiber unit only can detect temperature variation, composite fiber can detect strain and variation of temperature simultaneously, thereby can compensate the temperature effect of composite fiber according to the temperature variation that the flexible pipe fiber unit detects, both measured values are compared, thereby can obtain accurate strain measurement value.The utility model sensing optic cable can be made multiple shape according to the ambient conditions that lays simultaneously, so that cloth is placed on various measurement occasions, construction and maintenance cost have been saved greatly, has market popularization value preferably, be particularly suitable for Long-distance Control in fire detection, low-temperature (low temperature) vessel, high temperature pipe detection, hot system, the monitoring of steam-driven generator, and in military systems such as space flight, aviation, nuclear device, use.
Description of drawings
Accompanying drawing 1 is the utility model sensing optic cable viewgraph of cross-section;
Accompanying drawing 2 is the structural representation of the utility model temperature sense optical fiber;
Wherein: 1, silicon rubber protective seam; 2, composite fiber; 3, flexible pipe fiber unit; 31, metal hose; 32, temperature sense optical fiber; 321, fibre core; 322, fibre cladding; 323, carbon sealant; 324, polyimide coating; 4, restrictive coating; 41, organdy braid; 42, outer jacket;
Embodiment
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:
Sensing optic cable as shown in Figure 1, but its be with the composite fiber 2 of many detected temperatures and strains simultaneously with one in be provided with the optical fiber that some temperature sensors change flexible pipe fiber unit 3 usefulness silicon rubber protective seams 1 enclose to cover with restrictive coating 4 again after wrapping up and form.
Particularly, in the present embodiment, composite fiber 2 is four, and it adopts single mode or multimode optical fiber (diameter is 0.25mm), silicon rubber protective seam 1 and its fluid-tight engagement, thus the strain that optical cable is subjected to can be directly delivered on this optical fiber 2.
Flexible pipe fiber unit 3 comprise metal hose 31, in be located at many temperature sense optical fiber 32 in the soft liver 31 of metal; wherein; metal hose 31 is formed by stainless steel thin slice phase helically coiling; optical fiber 32 main fibre cladding 322, carbon sealant 323 and the polyimide coatings that are coated on outside the fibre core 321 by fibre core 321, successively constitute; as shown in Figure 2; wherein; carbon sealant 323 is in order to protection fibre core 321; not only protect optical fiber not to be subjected to the invasion and attack of moisture but also make optical fiber that splendid weatherability be arranged; the outermost layer coating polyimide can make optical fiber can adapt to extreme temperature environment.Because the optical fiber 32 in the flexible pipe fiber unit 3 are to be present among the optical cable with free state, the suffered strain of optical cable can not be delivered to this optical fiber fully and gets on like this.Therefore, 3 of this flexible pipe fiber units use as temperature-sensing element.
The organdy braid 41 that outer jacket 4 is formed by organdy braiding and weave by organdy and to form and constitute with the outer jacket 42 that the polyimide resin dip-coating forms.Playing the unlikely destroyed property of protection optical fiber with the organdy establishment breaks; can play favorable mechanical and chemoproection effect to optical cable by the organdy braiding and with the outer jacket 42 that the polyimide resin dip-coating forms; and can in-180 ℃～+ 300 ℃ temperature ranges, work, thereby this optical cable is applied under the extreme meteorological condition.
The utility model sensing optic cable is used for the BOTDR distributed optical fiber sensing system when using as sensing element, its composite fiber detects strain and variation of temperature simultaneously, and a flexible pipe fiber unit detected temperatures changes, the temperature parameter of measuring by the flexible pipe fiber unit compensates calculating, thereby can compensate the temperature effect of composite fiber, finally obtain the pure measured value of strain.
And the utility model sensing optic cable can make different shapes according to user's the situation of laying during fabrication, so that optical cable can be good at being fixed on tested civil engineering structure or the oil and gas pipes surface.Plays anti-Zhang Zuoyong with the organdy braiding in the optical cable, lay with use in protection optical fiber itself can not be subjected to big tensile force.Adopt polyimide as oversheath, be because polyimide is that a kind of temperature resistant grade is higher, a kind of preferably macromolecular materials such as mechanical property, dielectric properties, corrosion resistant performance, its important feature is the tangible melting point of neither one, thermal expansivity is minimum, can guarantee under arduous operating conditions, keeps the size and the function-stable that lay, can be in the work of low temperature continous-stable in high temperature 482 degree even the higher point range, to guarantee the serviceable life of optical cable.
Claims (6)
1. sensing optic cable that is used for strain and temperature detection; it is characterized in that: it comprises silicon rubber protective seam (1); be plugged at least one composite fiber (2) that is used for while temperature sensor and STRESS VARIATION in the described silicon rubber protective seam (1); be plugged in the flexible pipe fiber unit (3) that temperature sensor changes that is used in the described silicon rubber protective seam (1); be coated on the restrictive coating (4) of described silicon rubber protective seam (1) periphery, described flexible pipe fiber unit (3) comprises metal hose (31); be arranged at least one temperature sense optical fiber (32) in the described metal hose (31).
2. a kind of sensing optic cable that is used for strain and temperature detection according to claim 1 is characterized in that: described restrictive coating (4) comprises the organdy braid (41) that fits tightly with the outer phase of described silicon rubber protective seam (1), be wrapped in described organdy braid (41) periphery by organdy braiding and the outer jacket (42) that forms with the polyimide resin dip-coating.
3. a kind of sensing optic cable that is used for strain and temperature detection according to claim 1 is characterized in that: described composite fiber (2) is 1～4.
4. according to claim 1 or 3 described a kind of sensing optic cables that are used for strain and temperature detection, it is characterized in that: described composite fiber (2) is single-mode fiber or multimode optical fiber.
5. a kind of sensing optic cable that is used for strain and temperature detection according to claim 1 is characterized in that: described every temperature sense optical fiber (32) comprises fibre core (321), is coated on fibre cladding (322), carbon sealant (323) and the polyimide coating (324) of described fibre core (321) periphery successively.
6. a kind of according to claim 1 or 5 sensing optic cable that is used for strain and temperature detection is characterized in that: described metal hose (31) is formed by sheet metal phase helically coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201425338U CN201488836U (en) | 2009-04-20 | 2009-04-20 | Sensing optical cable for detecting strain and temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201425338U CN201488836U (en) | 2009-04-20 | 2009-04-20 | Sensing optical cable for detecting strain and temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201488836U true CN201488836U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201425338U Expired - Lifetime CN201488836U (en) | 2009-04-20 | 2009-04-20 | Sensing optical cable for detecting strain and temperature |
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| CN (1) | CN201488836U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023061A (en) * | 2010-10-22 | 2011-04-20 | 林茂 | Double-channel Brillouin optical fiber cable sensor |
| CN102853937A (en) * | 2012-09-14 | 2013-01-02 | 长沙有色冶金设计研究院有限公司 | Device for measuring multipoint temperature of surface of pipe system by temperature sensing optical wire in alumina dissolve out process |
| CN102927820A (en) * | 2012-10-31 | 2013-02-13 | 戈文燕 | System for directly measuring burn-through point position and burn-through temperature of downdraft sintering machine |
| CN103472531A (en) * | 2013-09-25 | 2013-12-25 | 长飞光纤光缆有限公司 | Low-attenuation high temperature resistance optical fiber |
| CN104199159A (en) * | 2014-09-05 | 2014-12-10 | 四川通光光缆有限公司 | Flat type belt-shaped sensing cable for synchronously monitoring temperature and strain |
| CN105716754A (en) * | 2016-02-17 | 2016-06-29 | 中国科学院南海海洋研究所 | Rock stratum stress variation temperature response monitoring device |
| 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 |
-
2009
- 2009-04-20 CN CN2009201425338U patent/CN201488836U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023061A (en) * | 2010-10-22 | 2011-04-20 | 林茂 | Double-channel Brillouin optical fiber cable sensor |
| CN102853937A (en) * | 2012-09-14 | 2013-01-02 | 长沙有色冶金设计研究院有限公司 | Device for measuring multipoint temperature of surface of pipe system by temperature sensing optical wire in alumina dissolve out process |
| CN102853937B (en) * | 2012-09-14 | 2014-09-17 | 长沙有色冶金设计研究院有限公司 | Device for measuring multipoint temperature of surface of pipe system by temperature sensing optical wire in alumina dissolve out process |
| CN102927820A (en) * | 2012-10-31 | 2013-02-13 | 戈文燕 | System for directly measuring burn-through point position and burn-through temperature of downdraft sintering machine |
| CN102927820B (en) * | 2012-10-31 | 2014-10-15 | 戈文燕 | System for directly measuring burn-through point position and burn-through temperature of downdraft sintering machine |
| CN103472531A (en) * | 2013-09-25 | 2013-12-25 | 长飞光纤光缆有限公司 | Low-attenuation high temperature resistance optical fiber |
| CN103472531B (en) * | 2013-09-25 | 2015-11-18 | 长飞光纤光缆股份有限公司 | A kind of low decay high-temperature resistant optical fiber |
| CN104199159A (en) * | 2014-09-05 | 2014-12-10 | 四川通光光缆有限公司 | Flat type belt-shaped sensing cable for synchronously monitoring temperature and strain |
| CN105716754A (en) * | 2016-02-17 | 2016-06-29 | 中国科学院南海海洋研究所 | Rock stratum stress variation temperature response monitoring device |
| CN105716754B (en) * | 2016-02-17 | 2018-06-22 | 中国科学院南海海洋研究所 | A kind of terrane stress transformation temperature responds monitoring device |
| US10114147B2 (en) | 2016-02-17 | 2018-10-30 | South China Sea Institute Of Oceanology, Chinese Academy Of Sciences | Device for monitoring temperature response to stress change in strata |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TONGDING INTERCONNECTION INFORMATION CO., LTD. Free format text: FORMER NAME: JIANGSU TONGDING OPTICAL + ELECTRIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Wujiang Zhenze Town District of Suzhou City, Jiangsu province 215233 eight Xiaoping Avenue No. 8 Patentee after: The logical interconnected information limited company of ancient cooking vessel Address before: 215233 Wujiang City, Jiangsu Province eight Zhenze Town Development Zone Xiaoping Road No. 18 Patentee before: Jiangsu Tongding Optical & Electric Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |