CN102478387A - Stay wire displacement sensor based on fiber Bragg gratings - Google Patents
Stay wire displacement sensor based on fiber Bragg gratings Download PDFInfo
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- CN102478387A CN102478387A CN2010105577619A CN201010557761A CN102478387A CN 102478387 A CN102478387 A CN 102478387A CN 2010105577619 A CN2010105577619 A CN 2010105577619A CN 201010557761 A CN201010557761 A CN 201010557761A CN 102478387 A CN102478387 A CN 102478387A
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Abstract
The invention discloses a stay wire displacement sensor based on fiber Bragg gratings, which comprises a housing. A reel, a stay wire, a volute spring, a slide bar, a first substrate, a second substrate, a first fiber Bragg grating and a transmission unit are disposed in the housing. The stay wire is wound on the reel, a starting end of the stay wire extends out of the housing from a stay wire hole, a stay wire end is arranged at the starting end of the stay wire, an input end of the transmission unit is mounted on the reel, the first substrate is mounted at an output end of the transmission unit, the volute spring is mounted on the transmission unit, one end of the slide bar is movably mounted at the upper end of the first substrate, the other end of the slide bar is fixed on the housing through the second substrate, one end of the first fiber Bragg grating is fixed at the lower end of the first substrate through an auxiliary spring, the other end of the first fiber Bragg grating is fixed on the second substrate through a vertical post, two ends of the first fiber Bragg grating are respectively connected with a testing unit through extended fibers, and the testing unit is connected with a processing unit. The stay wire displacement sensor based on fiber Bragg gratings can meet the requirements of wide-range and long-length monitoring.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, particularly a kind of backguy displacement sensing apparatus based on fiber grating.
Background technology
The stay-supported displacement transducer is widely used in machining measurement and other productive lifes after last century, the fifties emerged, and its basic structure comprises shell, backguy, reel, spiral spring and potentiometer; Reel is fixedly connected with potentiometer is coaxial, and wire hole is arranged on the shell, during the displacement of test object under test; Backguy is stretched out from the backguy hole; Its principle is with in the backguy elongation process, drives the rotation of reel, through potentiometer the rotation of reel is converted into the electric signal that can measure, transmit then; In the distance that electric signal is scaled the backguy elongation, reach the purpose of test object under test displacement.Because its principle of work is simple, cost is low, accommodative ability of environment is strong and precision is high, so range of application is wider.
But because reel is coaxial with potentiometer, more for a long time, potentiometer abrasion is serious at the potentiometer rotating cycle, and its precision and serviceable life are had a greatly reduced quality; Traditional in addition stay-supported displacement transducer is to be that signal is transmitted on the basis with the electric charge; Then many have under electromagnetic interference (EMI) and the strong-electromagnetic field environment disturb in using many; And problem is a lot of when needs make up sensor array and distant signal transmission; The complexity and the cost of system sharply rise, thereby have limited its use.As the landslide is being carried out in the early warning and monitoring; Need follow the tracks of the extend sizes and the speed in a plurality of cracks of massif surface distributed constantly; Adopting the stay-supported sensor is a kind of selection preferably; But existing is that the backguy sensor on basis makes up distributed or quasi-distributed sensor array difficulty on the one hand with the electric charge, responsive to electromagnetic interference (EMI) on the other hand, and in the actual life when big rainfall occurring also landslide crucial moment of danger just; And generally all can follow Thunderstorm Weather this moment, thereby make traditional backguy sensor can't be competent at this work.
In the patent of one Chinese patent application number 200810201667.2 " a kind of stay-supported optical fiber grating displacement sensors " a kind of scheme has been proposed: be to be that the potentiometer that sensing unit has substituted the conventional pull wires sensor comes the elongation of backguy is measured with the fiber grating; And through optical fiber with the transmission of this signal; This kind fiber grating backguy formula displacement transducer has plurality of advantages; Like anti-electromagnetic interference (EMI), volume is little, precision is high, be easy to make up quasi-distributed sensor array; And the purpose that can the long-distance transmissions of light signal be reached remote monitoring, the monitoring personnel have been broken away from such as such hazardous location, landslide.But this fiber grating displacement sensor is through realizing the traction to fiber grating with the coaxial little rotating shaft of reel and backguy and a little runner; As everyone knows; Fiber grating is a highstrung sensing unit, can respond very little STRESS VARIATION, but its variable elongation amount is very little; So the small elongation of the backguy in this device and the subtle change amount under temperature variation all can impact fiber grating; Thereby cause the error of test result bigger than normal, simultaneously cause its insufficient strength, excessive then can limit the displacement measurement scope of this device or the fiber grating tensile strain is made latter's performance degradation too greatly with the coaxial too small meeting of little rotating shaft of reel; Even damage, these have all limited promoting the use of of such fiber grating pull line sensor.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, a kind of backguy displacement sensing apparatus based on fiber grating is provided.The present invention can satisfy on a large scale, the requirement of length monitoring, and it is simple in structure, reasonable in design, processing and fabricating convenient and use-pattern is flexible, highly sensitive, result of use is good, cost is low.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is: based on the backguy displacement sensing apparatus of fiber grating; It is characterized in that: comprise housing, test cell and processing unit, be provided with reel, backguy, spiral spring, slide bar, substrate one, substrate two, fiber grating one and gear unit in the said housing, said backguy is wrapped on the reel and the end end of backguy is fixed on the reel; The initiating terminal of said backguy stretches out from said housing through the backguy mouth; The initiating terminal of said backguy is provided with pull wire head, and the input end of said gear unit is installed on the reel, and said substrate one is installed in the output terminal of gear unit; Said substrate one can be subjected to displacement by relative gear unit under the drive of gear unit; Said spiral spring is installed in and is used on the gear unit the resetting of gear unit, and an end of said slide bar is movably arranged on the upper end of substrate one, and the other end of said slide bar is fixed on the housing through substrate two; One end of said fiber grating one is fixed on the lower end of substrate one through auxiliary spring; The other end of said fiber grating one is fixed on the substrate two through column, and the two ends of said fiber grating one are connected with test cell through extended fiber respectively, and said test cell is connected with processing unit.
Above-mentioned backguy displacement sensing apparatus based on fiber grating; Said gear unit is rotation axis and drive link; Said rotation axis is installed in inner walls through bearing one; Said drive link is connected with rotation axis is coaxial, and said substrate one is installed on the drive link and said substrate one is a threaded engagement with drive link, and said spiral spring is installed on the rotation axis.
Above-mentioned backguy displacement sensing apparatus based on fiber grating, said substrate two stationary housing inwalls.
Above-mentioned backguy displacement sensing apparatus based on fiber grating, said substrate two is provided with the adjustment screw rod that is slidingly matched with substrate two, and said adjustment screw rod passes housing, and said adjustment screw rod and housing threaded engagement.
The above-mentioned backguy displacement sensing apparatus based on fiber grating is in series with fiber grating two on the said fiber grating one.
The above-mentioned backguy displacement sensing apparatus based on fiber grating, said spiral spring is installed in the spiral spring shell.
The present invention compared with prior art has the following advantages:
1, it is convenient and use-pattern is flexible, highly sensitive that the present invention has simple in structure, reasonable in design, method of operating;
2, pass through the adjustment screw rod among the present invention, can make things convenient for the adjustment of use, make higher, the longer service life of this device precision.
2, the present invention is because of the gear unit that utilized threaded engagement and further adopt the worm and gear device; Thereby can select suitable backguy length practical requirement as required; Its backguy length can reach several meters to tens of meters scope easily, makes this device have wider usable range.
In sum, the present invention is simple in structure, reasonable in design, processing and fabricating convenient and use-pattern is flexible, highly sensitive, result of use is good, but location moves advantages such as scope is big, makes device of the present invention have good use prospect.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is the embodiment of the invention 1 synoptic diagram.
Fig. 2 is the embodiment of the invention 2 synoptic diagram.
Fig. 3 is the embodiment of the invention 3 synoptic diagram.
Description of reference numerals:
| The 1-extended fiber; | 2-substrate one; | 3-substrate two; |
| The 4-column; | The 5-test cell; | The 7-processing unit; |
| The 10-housing; | The 11-rotation axis; | The 12-bearing-; |
| The 13-reel; | The 15-backguy; | 16-spiral spring shell; |
| The 17-spiral spring; | The 18-drive link; | The 20-pull wire head; |
| The 21-slide bar; | The 22-dividing plate; | 24-backguy mouth; |
| The 25-auxiliary spring; | 30-adjusts screw rod; | 33-fiber grating one; |
| 34-fiber grating two; | 35-bearing two. |
Embodiment
A kind of backguy displacement sensing apparatus as shown in Figure 1 based on fiber grating; Comprise housing 10, test cell 5 and processing unit 7; Be provided with reel 13, backguy 15, spiral spring 17, slide bar 21, substrate 1, substrate 23, fiber grating 1 and gear unit in the said housing 10; Said backguy 15 is wrapped on the reel 13 and the end end of backguy 15 is fixed on the reel 13, and the initiating terminal of said backguy 15 stretches out from said housing 10 through backguy mouth 24, and the initiating terminal of said backguy 15 is provided with pull wire head 20; The input end of said gear unit is installed on the reel 13; Said substrate 1 is installed in the output terminal of gear unit, and said substrate 1 can be subjected to displacement by relative gear unit under the drive of gear unit, and said spiral spring 17 is installed in and is used for resetting to gear unit on the gear unit; One end of said slide bar 21 is movably arranged on the upper end of substrate 1; The other end of said slide bar 21 is fixed on the housing 10 through substrate 23, and an end of said fiber grating 1 is fixed on the lower end of substrate 1 through auxiliary spring 25, and the other end of said fiber grating 1 is fixed on the substrate 23 through column 4; The two ends of said fiber grating 1 are connected with test cell 5 through extended fiber 1 respectively, and said test cell 5 is connected with processing unit 7.
In the present embodiment; Said gear unit is rotation axis 11 and drive link 18, and said rotation axis 11 is installed in housing 10 inwalls through bearing 1, is provided with dividing plate 22 in the said housing 10; Said transmission shaft 11 is connected with dividing plate 22 through bearing 2 35; Said drive link 18 and 11 coaxial connections of rotation axis, said substrate 1 are installed on the drive link 18 and said substrate 1 is threaded engagement with drive link 18, and said spiral spring 17 is installed on the rotation axis 11.Said substrate 23 stationary housings 10 inwalls.During use; Described gear unit is driven by reel 13 under the mobile traction of backguy 15; And make the change in location of the substrate 1 that is fixed on the drive link 18; Thereby change the stress state of fiber grating 1, make the foveal reflex wavelength change of fiber grating 1, said test cell 5 obtains this variable signal and it is passed to the treated size that obtains the moving displacement of backguy 15 in processing unit 7 backs.
Can according to actual needs test cell 5 and processing unit 7 and extended fiber 1 be placed in the housing 10, when the needs remote monitor, test cell 5 and processing unit 7 placed in the Control Room away from the monitoring point.
In housing 10, be filled with the serviceable life of greasy for preventing water in order to waterproof and extended fiber grating and optical fiber.
Said gear unit also can be made up of worm and gear or other mechanical hook-ups.
As shown in Figure 2, in the present embodiment, different with embodiment 1 is: said substrate 23 is provided with the adjustment screw rod 30 that is slidingly matched with substrate 23, and said adjustment screw rod 30 passes housing 10, and said adjustment screw rod 30 and housing 10 threaded engagement.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 2.
As shown in Figure 3; In the present embodiment; Different with embodiment 1 is: be in series with fiber grating 2 34 on the said fiber grating 1, fiber grating 2 34 is used to monitor the temperature variation in the housing 10, thereby can carry out temperature compensation to the test result of fiber grating 1.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit all still belongs in the protection domain of technical scheme of the present invention any simple modification, change and equivalent structure transformation that above embodiment did according to the present invention.
Claims (6)
1. based on the backguy displacement sensing apparatus of fiber grating; It is characterized in that: comprise housing (10), test cell (5) and processing unit (7); Be provided with reel (13), backguy (15), spiral spring (17), slide bar (21), substrate one (2), substrate two (3), fiber grating one (33) and gear unit in the said housing (10); Said backguy (15) is wrapped in reel (13) end end last and backguy (15) and is fixed on the reel (13); The initiating terminal of said backguy (15) stretches out from said housing (10) through backguy mouth (24); The initiating terminal of said backguy (15) is provided with pull wire head (20), and the input end of said gear unit is installed on the reel (13), and said substrate one (2) is installed in the output terminal of gear unit; Said substrate one (2) can be subjected to displacement by relative gear unit under the drive of gear unit; Said spiral spring (17) is installed in and is used on the gear unit the resetting of gear unit, and an end of said slide bar (21) is movably arranged on the upper end of substrate one (2), and the other end of said slide bar (21) is fixed on the housing (10) through substrate two (3); One end of said fiber grating one (33) is fixed on the lower end of substrate one (2) through auxiliary spring (25); The other end of said fiber grating one (33) is fixed on the substrate two (3) through column (4), and the two ends of said fiber grating one (33) are connected with test cell (5) through extended fiber (1) respectively, and said test cell (5) is connected with processing unit (7).
2. the backguy displacement sensing apparatus based on fiber grating according to claim 1; It is characterized in that: said gear unit is rotation axis (11) and drive link (18); Said rotation axis (11) is installed in housing (10) inwall through bearing one (12); Said drive link (18) and coaxial connection of rotation axis (11), said substrate one (2) are installed in that drive link (18) is gone up and said substrate one (2) is a threaded engagement with drive link (18), and said spiral spring (17) is installed on the rotation axis (11).
3. the backguy displacement sensing apparatus based on fiber grating according to claim 2 is characterized in that: said substrate two (3) stationary housing (10) inwalls.
4. the backguy displacement sensing apparatus based on fiber grating according to claim 2; It is characterized in that: said substrate two (3) is provided with the adjustment screw rod (30) that is slidingly matched with substrate two (3); Said adjustment screw rod (30) passes housing (10), and said adjustment screw rod (30) and housing (10) threaded engagement.
5. the backguy displacement sensing apparatus based on fiber grating according to claim 2 is characterized in that: be in series with fiber grating two (34) on the said fiber grating one (33).
6. the backguy displacement sensing apparatus based on fiber grating according to claim 2 is characterized in that: said spiral spring (17) is installed in the spiral spring shell (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105577619A CN102478387A (en) | 2010-11-24 | 2010-11-24 | Stay wire displacement sensor based on fiber Bragg gratings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105577619A CN102478387A (en) | 2010-11-24 | 2010-11-24 | Stay wire displacement sensor based on fiber Bragg gratings |
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| Publication Number | Publication Date |
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| CN102478387A true CN102478387A (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105577619A Pending CN102478387A (en) | 2010-11-24 | 2010-11-24 | Stay wire displacement sensor based on fiber Bragg gratings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983197A (en) * | 2014-05-16 | 2014-08-13 | 山东微感光电子有限公司 | Wide-range fiber bragg grating displacement sensor and measuring method |
| CN107476661A (en) * | 2017-08-02 | 2017-12-15 | 昆山金鸣光电科技有限公司 | A kind of lock core on off state sensing device and its application |
| CN110986794A (en) * | 2019-12-20 | 2020-04-10 | 山东微感光电子有限公司 | Fiber bragg grating displacement sensor with display function and capable of being recycled and measuring method |
| CN111473733A (en) * | 2020-04-24 | 2020-07-31 | 珠海任驰光电科技有限公司 | Ultra-large range fiber grating displacement sensor and measuring method |
| CN113819845A (en) * | 2021-08-05 | 2021-12-21 | 成都伊莱特光测科技有限公司 | Hydroelectric set servomotor stroke detection device and system |
-
2010
- 2010-11-24 CN CN2010105577619A patent/CN102478387A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983197A (en) * | 2014-05-16 | 2014-08-13 | 山东微感光电子有限公司 | Wide-range fiber bragg grating displacement sensor and measuring method |
| CN103983197B (en) * | 2014-05-16 | 2017-02-08 | 山东微感光电子有限公司 | Wide-range fiber bragg grating displacement sensor and measuring method |
| CN107476661A (en) * | 2017-08-02 | 2017-12-15 | 昆山金鸣光电科技有限公司 | A kind of lock core on off state sensing device and its application |
| CN110986794A (en) * | 2019-12-20 | 2020-04-10 | 山东微感光电子有限公司 | Fiber bragg grating displacement sensor with display function and capable of being recycled and measuring method |
| CN110986794B (en) * | 2019-12-20 | 2021-09-07 | 山东微感光电子有限公司 | Fiber bragg grating displacement sensor with display function and capable of being recycled and measuring method |
| CN111473733A (en) * | 2020-04-24 | 2020-07-31 | 珠海任驰光电科技有限公司 | Ultra-large range fiber grating displacement sensor and measuring method |
| CN113819845A (en) * | 2021-08-05 | 2021-12-21 | 成都伊莱特光测科技有限公司 | Hydroelectric set servomotor stroke detection device and system |
| CN113819845B (en) * | 2021-08-05 | 2024-03-19 | 成都伊莱特光测科技有限公司 | Stroke detection device and system for servomotor of hydroelectric generating set |
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Application publication date: 20120530 |