CN104677533A - Optical fiber pressure sensor - Google Patents
Optical fiber pressure sensor Download PDFInfo
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- CN104677533A CN104677533A CN201510061755.7A CN201510061755A CN104677533A CN 104677533 A CN104677533 A CN 104677533A CN 201510061755 A CN201510061755 A CN 201510061755A CN 104677533 A CN104677533 A CN 104677533A
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Abstract
The invention relates to and provides an optical fiber pressure sensor; the optical fiber pressure sensor comprises an encapsulation frame, a pressure membrane, a fixed optical fiber head, a receiving optical fiber head, a calibration screw, an elastic support chip, an optical fiber fixing sleeve, an optical fiber, a fixing bracket, a regulating bracket and a fixing sleeve mounted plate. By arranging stress holes, and fillets with transition connections, the optical fiber pressure sensor cannot be affected by a stress concentration phenomenon when the elastic support chip is stressed; meanwhile, with the calibration screw, the optical fiber pressure sensor can be adjusted at any time after being installed according to application occasions to guarantee the measurement accuracy; and with a locknut, the working stability is ensured; and at the same time, an isosceles triangular structure is adopted to connect the receiving optical fiber head with the optical fiber fixing sleeve, so the sensor can guarantee to reduce the influence to the working efficiency of the optical fiber to the minimum when being stressed through the stability and the symmetry of the isosceles triangular structure. According to the optical fiber pressure sensor, the structure of the optical fiber sensor is improved effectively, and the stability and the precision of the sensor in use are promoted greatly.
Description
Technical field
The present invention relates to a kind of fibre optic compression sensor, belong to sensor technical field.
Background technology
The one that optical fiber sensing technology is development along with light transmitting fiber and Fibre Optical Communication Technology and develops rapidly is carrier with light, and optical fiber is medium, the New Sensing Technology of perception and transmission outer signals (measured).When this outer signals is pressure, namely form fibre optic compression sensor.Fibre optic compression sensor is as a kind of novel sensor, little, lightweight with traditional pressure transducer phase specific volume, there is electrical insulating property, not by electromagnetic interference (EMI), can be used for the medium advantage of inflammable and explosive environment, optical fiber distributed type pressure transducer can also be formed in addition, bridge, dam etc. be carried out to the Real-Time Monitoring of health status.
Wherein, a kind of typical Fibre Optical Sensor, i.e. evanescent waves coupled mode Fibre Optical Sensor, according to frustrated total reflection principle, when the fibre core of two optical fiber close to each other to certain distance time, disappearance light wave can enter into another root optical fiber from a coupling fiber, a kind of evanescent waves coupled mode the principle of fiber Bragg grating strain sensor as shown in Figure 4, the angle of two fiber end face opposed optical fibers axles is identical, oblique section polishing, to form total internal reflection, two optical fiber very close to time, overwhelming majority luminous power can intercouple, if an optical fiber is fixed, another root optic fibre force effect produces displacement, change gap, optocoupler resultant so between optical fiber changes.But the unreasonable structure of current this sensor, governs the application of its market.
Summary of the invention
The object of this invention is to provide a kind of simple and reasonable for structure, cost is low, a kind of fibre optic compression sensor that precision is high.
For achieving the above object, the present invention adopts following technical scheme: a kind of fibre optic compression sensor, it comprises package shelf, pressure membrane, fixed fiber head, receive optical fiber head, adjusting screw, elastic support sheet, optical fiber fixed cover, optical fiber, fixed support, regulate support, fixed cover fixed head, it is characterized in that, the xsect of described package shelf is U-shaped structure, described fixed support and described adjustment support are separately positioned on the two ends of described package shelf inside, described fixed support is provided with fixed cover fixed head, described fixed cover fixed head internal fixtion is provided with optical fiber fixed cover, described optical fiber fixed cover internal fixtion is provided with fixed fiber head, described fixed fiber head and described Fiber connection, the bottom end of described adjustment support is fixedly installed on described package shelf inside, the other end of the bottom of described adjustment support is provided with adjusting screw, described adjusting screw is through described package shelf, and be connected with the internal thread threaded engagement in the correction screw that described adjustment support corresponds, described adjusting screw is provided with set nut, described adjustment support is fixedly connected with one end of described elastic support sheet, the other end of described elastic support sheet hangs in the sky, one end that described elastic support sheet hangs in the sky is fixedly installed fixed cover fixed head, described fixed cover fixed head internal fixtion is provided with optical fiber fixed cover, this optical fiber fixed cover internal fixtion is provided with reception optical fiber head, described reception optical fiber head and described Fiber connection, the upper end of the fixed cover fixed head on described elastic support sheet is fixedly connected with pressure membrane, described pressure membrane is fixedly installed on the top of described package shelf by set collar, described fixed fiber head is parallel with described reception optical fiber head end to be oppositely arranged, and there is certain gradient.
Further, as preferably, the partial cross sectional that described reception optical fiber head is connected with described optical fiber fixed cover is isosceles triangle, the center of described optical fiber fixed cover is provided with the isosceles triangle hole for installing described reception optical fiber head, is fixed on described reception optical fiber head with the form of triangular structure to make described reception optical fiber head.
Further, as preferably, the shape of cross section of described elastic support sheet is rectangular structure, and described elastic support sheet is fixedly connected with the upper surface of described adjustment support, and two of connecting end portion angles adopt round-corner transition to connect, two end angle places of one end that described elastic support sheet hangs in the sky also adopt round-corner transition to connect.
Further, as preferably, described elastic support sheet is symmetrically arranged with four stress holes, and described stress hole is rectangle structure, and rectangular four angles adopt arc transition to connect.
Further, as preferably, the pitch of described adjusting screw is less than 0.02mm.
Further, as preferably, the gradient of described fixed fiber head and described reception optical fiber head end is 45-60 °.
Beneficial effect of the present invention is, the structure of the present invention to Fibre Optical Sensor is rationally arranged, and from stress point of view, Curve guide impeller is carried out to the structure of elastic support sheet, by arranging the fillet that stress hole is connected with transition, can ensure that elastic support sheet can not be impacted by stress concentration phenomenon when stressed, adjusting screw is set simultaneously, adjust at any time after can ensureing to install according to application scenario, ensure the precision measured, and be provided with set nut, ensure that the stability of its work, simultaneously, adopt isosceles triangular structure to connect and receive optical fiber head and optical fiber fixed cover, can ensure that it is when stressed, rely on isosceles triangle stability and symmetric structure, drop to minimum on the impact of fiber work precision when ensureing stressed, the present invention effectively improves the structure of Fibre Optical Sensor, substantially increase its stability used and accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of fibre optic compression sensor of the present invention;
Fig. 2 is reception optical fiber head and the optical fiber fixed cover annexation schematic diagram of a kind of fibre optic compression sensor of the present invention;
Fig. 3 is the structural representation of the elastic support sheet of a kind of fibre optic compression sensor of the present invention;
Fig. 4 is the principle of work schematic diagram of evanescent waves coupled mode Fibre Optical Sensor;
In figure: 1, package shelf, 2, pressure membrane, 3, fixed fiber head, 4, receive optical fiber head, 5, adjusting screw, 6, elastic support sheet, 7, optical fiber fixed cover, 8, optical fiber, 9, fixed support, 10, support is regulated, 11, set nut, 12, fixed cover fixed head, 13, stress hole.
Embodiment
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.
As shown in Figure 1, the invention provides a kind of fibre optic compression sensor, it comprises package shelf 1, pressure membrane 2, fixed fiber head 3, receive optical fiber head 4, adjusting screw 5, elastic support sheet 6, optical fiber fixed cover 7, optical fiber 8, fixed support 9, regulate support 10, fixed cover fixed head 12, the xsect of package shelf 1 is U-shaped structure, fixed support 9 and adjustment support 10 are separately positioned on the two ends of package shelf 1 inside, fixed support 9 is provided with fixed cover fixed head 12, fixed cover fixed head 12 internal fixtion is provided with optical fiber fixed cover 7, optical fiber fixed cover 7 internal fixtion is provided with fixed fiber head 3, fixed fiber head 3 is connected with optical fiber 8, the bottom end of support 10 is regulated to be fixedly installed on package shelf 1 inner, the other end of the bottom of support 10 is regulated to be provided with adjusting screw 5, adjusting screw 5 is through package shelf 1, and be connected with the internal thread threaded engagement in the correction screw that adjustment support 10 corresponds, adjusting screw 5 is provided with set nut 11, support 10 is regulated to be fixedly connected with one end of elastic support sheet 6, the other end of elastic support sheet 6 hangs in the sky, one end that elastic support sheet 6 hangs in the sky is fixedly installed fixed cover fixed head 12, fixed cover fixed head 12 internal fixtion is provided with optical fiber fixed cover 7, this optical fiber fixed cover internal fixtion is provided with and receives optical fiber head 4, receive optical fiber head 4 to be connected with optical fiber 8, the upper end of the fixed cover fixed head 12 on elastic support sheet 6 is fixedly connected with pressure membrane 2, pressure membrane 2 is fixedly installed on the top of package shelf 1 by set collar (not shown), fixed fiber head 3 and receive that optical fiber head 4 end is parallel is oppositely arranged, and there is certain gradient.
As shown in Figure 2, drop to minimum on the impact of fiber work precision during in order to ensure stressed, the partial cross sectional that reception optical fiber head 4 is connected with optical fiber fixed cover 7 is isosceles triangle, the center of optical fiber fixed cover 7 is provided with for installing the isosceles triangle hole receiving optical fiber head 4, is fixed on reception optical fiber head 4 with the form of triangular structure to make reception optical fiber head.
As shown in Figure 3, the shape of cross section of elastic support sheet 6 is rectangular structure, and elastic support sheet 6 is fixedly connected with regulating the upper surface of support 10, and two of connecting end portion angles adopt round-corner transition to connect, two end angle places of one end that elastic support sheet 6 hangs in the sky also adopt round-corner transition to connect.Elastic support sheet 6 is symmetrically arranged with four stress holes, and stress hole is rectangle structure, and rectangular four angles adopt arc transition to connect.
In the present embodiment, the pitch of adjusting screw 5 is less than 0.02mm.Fixed fiber head 3 is 45-60 ° with the gradient of reception optical fiber head 4 end.
The structure of the present invention to Fibre Optical Sensor is rationally arranged, and from stress point of view, Curve guide impeller is carried out to the structure of elastic support sheet, by arranging the fillet that stress hole is connected with transition, can ensure that elastic support sheet can not be impacted by stress concentration phenomenon when stressed, adjusting screw is set simultaneously, adjust at any time after can ensureing to install according to application scenario, ensure the precision measured, and be provided with set nut, ensure that the stability of its work, simultaneously, adopt isosceles triangular structure to connect and receive optical fiber head and optical fiber fixed cover, can ensure that it is when stressed, rely on isosceles triangle stability and symmetric structure, drop to minimum on the impact of fiber work precision when ensureing stressed, the present invention effectively improves the structure of Fibre Optical Sensor, substantially increase its stability used and accuracy.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (6)
1. a fibre optic compression sensor, it comprises package shelf, pressure membrane, fixed fiber head, receive optical fiber head, adjusting screw, elastic support sheet, optical fiber fixed cover, optical fiber, fixed support, regulate support, fixed cover fixed head, it is characterized in that, the xsect of described package shelf is U-shaped structure, described fixed support and described adjustment support are separately positioned on the two ends of described package shelf inside, described fixed support is provided with fixed cover fixed head, described fixed cover fixed head internal fixtion is provided with optical fiber fixed cover, described optical fiber fixed cover internal fixtion is provided with fixed fiber head, described fixed fiber head and described Fiber connection, the bottom end of described adjustment support is fixedly installed on described package shelf inside, the other end of the bottom of described adjustment support is provided with adjusting screw, described adjusting screw is through described package shelf, and be connected with the internal thread threaded engagement in the correction screw that described adjustment support corresponds, described adjusting screw is provided with set nut, described adjustment support is fixedly connected with one end of described elastic support sheet, the other end of described elastic support sheet hangs in the sky, one end that described elastic support sheet hangs in the sky is fixedly installed fixed cover fixed head, described fixed cover fixed head internal fixtion is provided with optical fiber fixed cover, this optical fiber fixed cover internal fixtion is provided with reception optical fiber head, described reception optical fiber head and described Fiber connection, the upper end of the fixed cover fixed head on described elastic support sheet is fixedly connected with pressure membrane, described pressure membrane is fixedly installed on the top of described package shelf by set collar, described fixed fiber head is parallel with described reception optical fiber head end to be oppositely arranged, and there is certain gradient.
2. a kind of fibre optic compression sensor according to claim 1, it is characterized in that, the partial cross sectional that described reception optical fiber head is connected with described optical fiber fixed cover is isosceles triangle, the center of described optical fiber fixed cover is provided with the isosceles triangle hole for installing described reception optical fiber head, is fixed on described reception optical fiber head with the form of triangular structure to make described reception optical fiber head.
3. a kind of fibre optic compression sensor according to claim 1, it is characterized in that, the shape of cross section of described elastic support sheet is rectangular structure, and described elastic support sheet is fixedly connected with the upper surface of described adjustment support, and two of connecting end portion angles adopt round-corner transition to connect, two end angle places of one end that described elastic support sheet hangs in the sky also adopt round-corner transition to connect.
4. a kind of fibre optic compression sensor according to claim 3, is characterized in that, described elastic support sheet is symmetrically arranged with four stress holes, and described stress hole is rectangle structure, and rectangular four angles adopt arc transition to connect.
5. a kind of fibre optic compression sensor according to claim 1, is characterized in that, the pitch of described adjusting screw is less than 0.02mm.
6. a kind of fibre optic compression sensor according to claim 1, is characterized in that, the gradient of described fixed fiber head and described reception optical fiber head end is 45-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510061755.7A CN104677533A (en) | 2015-02-04 | 2015-02-04 | Optical fiber pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510061755.7A CN104677533A (en) | 2015-02-04 | 2015-02-04 | Optical fiber pressure sensor |
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| CN104677533A true CN104677533A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510061755.7A Pending CN104677533A (en) | 2015-02-04 | 2015-02-04 | Optical fiber pressure sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828286A (en) * | 2019-03-08 | 2019-05-31 | 上海禾赛光电科技有限公司 | Laser radar |
| CN109916282A (en) * | 2019-04-01 | 2019-06-21 | 南京智慧基础设施技术研究院有限公司 | A kind of malformation device and its detection method based on Fibre Optical Sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926584A (en) * | 1995-09-15 | 1999-07-20 | Motzko; Friedrich | Fiber optic load sensor |
| CN103673913A (en) * | 2013-12-13 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Novel fiber optic strain sensor and mounting method thereof |
| CN103698080A (en) * | 2014-01-09 | 2014-04-02 | 中国人民解放军总参谋部工程兵科研三所 | Optical fiber F-P cavity high-voltage sensor |
| CN203870289U (en) * | 2014-04-18 | 2014-10-08 | 河北四方通信设备有限公司 | Polarization maintaining fiber aligning and positioning device |
-
2015
- 2015-02-04 CN CN201510061755.7A patent/CN104677533A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926584A (en) * | 1995-09-15 | 1999-07-20 | Motzko; Friedrich | Fiber optic load sensor |
| CN103673913A (en) * | 2013-12-13 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Novel fiber optic strain sensor and mounting method thereof |
| CN103698080A (en) * | 2014-01-09 | 2014-04-02 | 中国人民解放军总参谋部工程兵科研三所 | Optical fiber F-P cavity high-voltage sensor |
| CN203870289U (en) * | 2014-04-18 | 2014-10-08 | 河北四方通信设备有限公司 | Polarization maintaining fiber aligning and positioning device |
Non-Patent Citations (2)
| Title |
|---|
| 刘跃辉等: "光纤压力传感器", 《光电子技术》 * |
| 毕卫红等: "新型光纤压力传感器", 《仪表技术与传感器》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828286A (en) * | 2019-03-08 | 2019-05-31 | 上海禾赛光电科技有限公司 | Laser radar |
| CN109916282A (en) * | 2019-04-01 | 2019-06-21 | 南京智慧基础设施技术研究院有限公司 | A kind of malformation device and its detection method based on Fibre Optical Sensor |
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