CN201476910U - Fiber bragg grating tension sensor with adjustable resolution ratio - Google Patents
Fiber bragg grating tension sensor with adjustable resolution ratio Download PDFInfo
- Publication number
- CN201476910U CN201476910U CN2009201728792U CN200920172879U CN201476910U CN 201476910 U CN201476910 U CN 201476910U CN 2009201728792 U CN2009201728792 U CN 2009201728792U CN 200920172879 U CN200920172879 U CN 200920172879U CN 201476910 U CN201476910 U CN 201476910U
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- spring
- bragg grating
- resolution ratio
- fiber bragg
- fiber grating
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Abstract
The utility model provides a fiber bragg grating tension sensor with adjustable resolution ratio, comprising a fiber bragg grating, a small weight, a spring and a frame; by changing the elastic coefficient, the resolution ratio of the sensor can be changed.
Description
One, technical field
The utility model relates to Fibre Optical Sensor, especially the fiber grating pulling force sensor.
Two, technical background
Fiber grating has the incomparable advantage of many other sensors: full photo measure at the on-the-spot no electrical equipment of monitoring, is not disturbed by electromagnetism and nuclear radiation; There is not drift zero point, long-term stability; Measured with catoptrical centre wavelength sign, be not subjected to the influence of factors such as light source power fluctuation, optical fiber micro-bending effect and coupling loss; Absolute magnitude is measured, and need not calibration in system's installation and the long-term use; Long service life or the like.
Three, utility model content
The utility model provides a kind of resolution adjustable optic fibre grating pulling force sensor, comprises fiber grating, little weight, spring and framework, can change the resolution of sensor by the elasticity coefficient that changes described spring.
Fiber grating is very responsive to strain.Utilize this feature,, make its dependent variable equal the dependent variable of spring by being connected in it and spring.Because stressed when causing strain to change, variation has also taken place in the dependent variable of fiber grating accordingly when spring.
The dependent variable of spring is directly proportional with its suffered power, is inversely proportional to its elasticity coefficient.Therefore, can select for use the spring of different elasticity coefficient to change its dependent variable under unit tension, the dependent variable of fiber grating is also with regard to corresponding change, and the resolution of sensor has just obtained change.
Four, description of drawings
Accompanying drawing is a structural representation of the present utility model.
Wherein, 1 is fiber grating, and 2 is little weight, and 3 is spring, and 4 is framework, and 5 is point of fixity, and 6 is the pulling force application point.
Five, specific embodiments
Below in conjunction with for example the utility model being done more detailed description:
This sensing rises mainly to be made up of four parts: fiber grating, little weight, spring and framework.Earlier fiber grating, little weight and spring are together in series by structure shown in the accompanying drawing.In little weight and spring junction, fix a steel wire, to apply pulling force.The other end of spring is fixed on the framework; Steel wire passes from the hole of framework.The other end of fiber grating is fixed on the framework.
When steel wire was subjected to pulling force, the strain meeting of spring changed, and the strain of fiber grating also can correspondingly change.When pulling force increased, fiber grating strain strengthened, and it returns the centre wavelength value and becomes big; When pulling force reduced, fiber grating strain reduced, and it returns the centre wavelength value and diminishes.Thereby, obtain tension variations information by wavelength variation information.
By selecting the spring of different elasticity coefficient for use, can change the resolution of sensor.When selecting the spring of big elasticity coefficient for use, the dependent variable of fiber grating reduces under the unit tension, and resolution reduces; Otherwise, then raise.
Claims (1)
1. resolution adjustable optic fibre grating pulling force sensor, comprise fiber grating, little weight, spring and framework, it is characterized in that: described fiber grating is fixed between described little weight and the described framework, and described spring is fixed between described little weight and the described framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201728792U CN201476910U (en) | 2009-08-19 | 2009-08-19 | Fiber bragg grating tension sensor with adjustable resolution ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201728792U CN201476910U (en) | 2009-08-19 | 2009-08-19 | Fiber bragg grating tension sensor with adjustable resolution ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201476910U true CN201476910U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201728792U Expired - Fee Related CN201476910U (en) | 2009-08-19 | 2009-08-19 | Fiber bragg grating tension sensor with adjustable resolution ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201476910U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060032A (en) * | 2019-10-25 | 2020-04-24 | 石家庄铁道大学 | Optical fiber grating inclinometer |
| CN111060031A (en) * | 2019-10-25 | 2020-04-24 | 石家庄铁道大学 | Optical fiber grating inclinometer |
-
2009
- 2009-08-19 CN CN2009201728792U patent/CN201476910U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060032A (en) * | 2019-10-25 | 2020-04-24 | 石家庄铁道大学 | Optical fiber grating inclinometer |
| CN111060031A (en) * | 2019-10-25 | 2020-04-24 | 石家庄铁道大学 | Optical fiber grating inclinometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20120819 |