CN202216671U - Fiber grating displacement meter - Google Patents
Fiber grating displacement meter Download PDFInfo
- Publication number
- CN202216671U CN202216671U CN2011202869598U CN201120286959U CN202216671U CN 202216671 U CN202216671 U CN 202216671U CN 2011202869598 U CN2011202869598 U CN 2011202869598U CN 201120286959 U CN201120286959 U CN 201120286959U CN 202216671 U CN202216671 U CN 202216671U
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- China
- Prior art keywords
- optical fiber
- steel cable
- grating
- outlet
- displacement meter
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- Expired - Fee Related
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses a fiber grating displacement meter comprising an optical fiber, a steel cable, a sleeve and plugs at two ends of the sleeve; wherein one plug is provided with an optical fiber inlet and a fixed bar interface, the other plug is provided with an optical fiber outlet and a steel cable outlet; a fixed briquetting, a beam and a mounting seat which are connected with other each are arranged in the sleeve in order; a strain grating and a temperature compensation grating are respectively pasted on the beam at two sides of the fixed briquetting; the optical fiber stretches in from the optical fiber inlet, then passes through the strain grating and the temperature compensation grating, and stretches out from the optical fiber outlet; one end of the steel cable is connected on the beam, the other end of the steel cable stretches out of the steel cable outlet; and a fixed pulley is provided between the steel cable and the beam in the sleeve, wherein the fixed pulley is a U groove bearing. The fiber grating displacement meter of the utility model has the beneficial effects of strong anti-electromagnetic interference performance, long measuring distance, good reliability, large measuring range, and high measuring precision.
Description
Technical field
The utility model relates to the engineering measurer, particularly a kind of Optical Fiber Grating Displacement Meter.
Background technology
At present; The normal measurer that adopts of the displacement deformation of monitoring building structure is an electronic sensor; The folding degree of the structural cracks of covil construction, hydraulic engineering or seam for example, and building foundation or the road and rail roadbed bankets or the soil body settling amount of other similar structures all obtains through the Displacement Measurement distortion are because electronic sensor self exists anti-thunderbolt poor performance, anti-electromagnetic interference performance is poor, measuring distance is nearer defective; Therefore, poor reliability, measurement range is little, measuring accuracy is not high.
Summary of the invention
The purpose of the utility model is the defective to above-mentioned prior art, provides that a kind of anti-thunderbolt property is good, anti-electromagnetic interference capability strong, measuring distance Optical Fiber Grating Displacement Meter far away, has good reliability, measurement range is big, measuring accuracy is high advantage.
The technical scheme taked of the utility model is to achieve these goals: Optical Fiber Grating Displacement Meter; The stopper that comprises optical fiber, steel cable, sleeve pipe and two ends thereof; One stopper is provided with optical fiber inlet and fixed bar interface, another stopper is provided with the optical fiber outlet and steel cable exports; Inside pipe casing is provided with interconnective fixedly briquetting, beam and mount pad in order; Fixedly be pasted with strain grating and temperature compensation grating on the beam of briquetting both sides respectively, optical fiber is stretched into by optical fiber inlet and strain grating on beam and temperature compensation grating, stretched out by the optical fiber outlet, and steel cable one end is connected on the beam, the other end stretches out the steel cable outlet; It is characterized in that: be provided with fixed pulley between the steel cable of said inside pipe casing and the beam, described fixed pulley is the U groove bearing.
Said steel cable exports external bourdon tube adapter.
The beneficial effect of the utility model is: anti-electromagnetic interference performance is strong, measuring distance is far away, good reliability, measurement range are big, and the advantage that measuring accuracy is high has the flexible expansion property of different ranges in addition.
Description of drawings
Fig. 1 is the utility model master cut-open view;
Fig. 2 is the vertical view that the utility model is cut sleeve pipe open.
Embodiment
A kind of Optical Fiber Grating Displacement Meter shown in Fig. 1-2 comprises the stopper 14 at optical fiber 3, steel cable 9, sleeve pipe 12 and two ends thereof, is provided with sealing film 13 between stopper 14 and the sleeve pipe 12.Wherein, a stopper 14 is provided with optical fiber inlet 1 and fixed bar interface 2, another stopper 14 is provided with optical fiber outlet 16 and steel cable exports 15.Sleeve pipe 12 inside are provided with beam 10, and beam 10 tops are provided with fixedly that briquetting 5, bottom are provided with mount pad 11.Fixedly briquetting 5 one side bonds on the beam 10 have strain grating 6.Owing to unavoidably can produce variation of temperature in the practical application; And variation of temperature can directly cause data measured to produce drift; In order to revise Influence of Temperature, the opposite side of the fixedly briquetting 5 of beam 10 bonding performance and beam grating 6 identical temperature compensation gratings 4.Because fixedly the acting in conjunction of briquetting 5 and mount pad 11 makes beam 10 do the time spent at power F, have only strain grating 6 places to have distortion and this is out of shape by the 6 complete perception of strain grating, and temperature compensation grating 4 one ends do not receive the influence of tensile force f.When variation of ambient temperature, it is identical that strain grating 6 and temperature compensation grating 4 receive Influence of Temperature.So, strain grating 6 is a temperature influence, receives the influence of tensile force f simultaneously again; And 4 simple temperature influences of temperature compensation grating; So cut the computing method removal temperature effect of the measured value of temperature compensation grating 4 with the measured value of strain grating 6; Thereby realized auto thermal compensation; Making the utility model is the influence that does not receive ambient temperature in measurement, makes the measurement of displacement more accurate, and precision can reach 0.1%FS.Optical fiber 3 is stretched into by optical fiber inlet 1 and strain grating 6 on beam 10 and temperature compensation grating 4, stretched out by optical fiber outlet 16.Steel cable 9 one ends are connected on the beam 10, the other end is walked around and answered pulley 7 to stretch out steel cable outlet 15 and bourdon tube adapter 8.The displacement meter of different ranges can be realized through the length that changes the spring of hanging in the bourdon tube adapter 8, made product realize seriation more easily.
The principle of work of the utility model: as shown in Figure 1; Spring in the bourdon tube adapter 8 links to each other with steel cable 9; Effect lower spring at external force F is pulled different length, acts on the elastic beam 10 through steel cable 9 and fixed pulley 7 F that exerts all one's strength, and beam 10 occurs bending and deformation under the effect of power F; The distortion that beam 10 is produced is bonded to 6 perception of strain grating on it; Strain grating 6 is sent to the grating analyser of far-end to signal with the size of the deflection that perceives through optical fiber 3, just can know the length that spring stretches through the grating analyser to the analysis of different wave length light signal, thereby realize the measurement of displacement.
The utility model self has that good, the anti-electromagnetic interference performance of anti-thunderbolt performance is strong, measuring distance is far away, good reliability, measurement range is big, measuring accuracy is high advantage, also has the flexible expansion property of different ranges in addition.
Claims (2)
1. Optical Fiber Grating Displacement Meter; The stopper that comprises optical fiber, steel cable, sleeve pipe and two ends thereof; One stopper is provided with optical fiber inlet and fixed bar interface, another stopper is provided with the optical fiber outlet and steel cable exports, and inside pipe casing is provided with interconnective fixedly briquetting, beam and mount pad in order, fixedly is pasted with strain grating and temperature compensation grating on the beam of briquetting both sides respectively; Optical fiber is stretched into by optical fiber inlet and strain grating on beam and temperature compensation grating, stretched out by the optical fiber outlet; Steel cable one end is connected on the beam, the other end stretches out the steel cable outlet, and it is characterized in that: be provided with fixed pulley between the steel cable of said inside pipe casing and the beam, described fixed pulley is the U groove bearing.
2. according to claims 1 described Optical Fiber Grating Displacement Meter, it is characterized in that: said steel cable exports external bourdon tube adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202869598U CN202216671U (en) | 2011-08-09 | 2011-08-09 | Fiber grating displacement meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202869598U CN202216671U (en) | 2011-08-09 | 2011-08-09 | Fiber grating displacement meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202216671U true CN202216671U (en) | 2012-05-09 |
Family
ID=46015920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202869598U Expired - Fee Related CN202216671U (en) | 2011-08-09 | 2011-08-09 | Fiber grating displacement meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202216671U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226006A (en) * | 2013-03-19 | 2013-07-31 | 西安科技大学 | Fiber grating displacement meter |
| CN105157577A (en) * | 2015-06-09 | 2015-12-16 | 中铁五局（集团）有限公司 | Optical fiber grating sensor for engineering displacement measurement |
-
2011
- 2011-08-09 CN CN2011202869598U patent/CN202216671U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226006A (en) * | 2013-03-19 | 2013-07-31 | 西安科技大学 | Fiber grating displacement meter |
| CN103226006B (en) * | 2013-03-19 | 2016-12-07 | 西安科技大学 | Optical Fiber Grating Displacement Meter |
| CN105157577A (en) * | 2015-06-09 | 2015-12-16 | 中铁五局（集团）有限公司 | Optical fiber grating sensor for engineering displacement measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhejiang Dahe Construction Material Testing Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20140809 |
|
| EXPY | Termination of patent right or utility model |