CN201488708U - Easily-coupled fiber bragg grating strain transducer - Google Patents
Easily-coupled fiber bragg grating strain transducer Download PDFInfo
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- CN201488708U CN201488708U CN2009201642560U CN200920164256U CN201488708U CN 201488708 U CN201488708 U CN 201488708U CN 2009201642560 U CN2009201642560 U CN 2009201642560U CN 200920164256 U CN200920164256 U CN 200920164256U CN 201488708 U CN201488708 U CN 201488708U
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- rods
- bragg grating
- fiber bragg
- strain
- fiber grating
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Abstract
The utility model provides an easily-coupled fiber bragg grating strain transducer which mainly comprises a fiber bragg grating as well as two rods and a pole which are connected with the fiber bragg grating in series. The two rods are fixed on the pole; and the fiber bragg grating is connected with the two rods in series, so that the fiber bragg grating has certain strain capacity. During the field installation, the two rods are fixed on an object of which the strain is to be measured; then the pole is released from the two rods; therefore, the purpose is achieved that the fiber bragg grating with strain capacity is coupled on the object of which the strain is to be measured.
Description
One, technical field
The utility model relates to Fibre Optical Sensor, especially fiber Bragg grating strain sensor.
Two, background technology
Fiber grating has the incomparable advantage of many other sensors as novel sensing element: full photo measure at the on-the-spot no electrical equipment of monitoring, is not disturbed by electromagnetism and nuclear radiation; 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, long service life or the like.
Fiber Bragg grating strain sensor is widely-used in industries such as bridge, buildings.Patent 200810104456.7 has proposed a kind of fiber grating strain sensitizing sensor.Fiber grating and one rod is connected, and then their free end is fixed to the object of strain to be measured.In the time of fixedly, make fiber grating have certain dependent variable.
This on-the-spot installation method grating that fractures easily.We have carried out some improvement to its structure, make its installation be more prone to more reliable performance.
Three, utility model content
The utility model provides a kind of fiber Bragg grating strain sensor of easy coupling, and it mainly is made up of two rods and a bar of fiber grating, series connection with it.On described bar, fix described two rods, and described fiber grating is connected with described two rods.Make fiber grating have certain dependent variable.During on-the-spot the installation, earlier two rods are fixed to the object of strain to be measured.Then, unstick from two rods.Like this, with regard to having realized the fiber grating with dependent variable is coupled to strain object to be measured.
Fixing between fiber grating and two rods, modes such as back welding can stick with glue, metallize; Fixing between rod and the bar, between rod and the strain object to be measured can be used screw, mode such as gluing; The method that makes fiber grating have certain dependent variable can adopt structures such as cylindrical void, stretching platform to realize.This sensor construction is simple, and is easy to use.
Four, description of drawings
Accompanying drawing 1 is that two rods that have a screw hole are fixed to the structural representation on the bar.
Accompanying drawing 2 is structural representations of fixed fiber grating.
Accompanying drawing 3 is the structural representations that add screw on strain object to be measured.
Accompanying drawing 4 is structural representations that sensor is just installed.
Accompanying drawing 5 is the structural representations after the sensor installation.
Wherein, 1 is the rod of connecting with grating, and 2 is that rod is gone up and the fixing screw hole of strain object to be measured, and 3 is the screw of hold-down bars and bar, and 4 is the bar of hold-down bars, and 5 is grating, and 6 is strain object to be measured, and 7 for being fixed on the screw on the strain object to be measured.
Five, embodiment
Below in conjunction with for example the utility model being done more detailed description:
This sensing rises mainly to be made up of three parts: the bar that has screw hole rod and hold-down bars of fiber grating, two series connections with it is formed.As shown in Figure 1, two rods that have screw hole are fixed on the bar.Then, fiber grating being fixed between two rods, as shown in Figure 2.By processing one bar hole on bar or rod in advance, after fiber grating stretched, gib screw again.So just make fiber grating have certain dependent variable.
On the object of strain to be measured, fix two screw bases, as shown in Figure 3 by welding, mode such as gluing.Then sensor is fixed to strain object to be measured, as shown in Figure 4.Afterwards, take off bar, as shown in Figure 5.
After this sensor was finished installation, the dependent variable of fiber grating was preceding more constant than substantially with installation.Before the installation, the dependent variable of regulating fiber grating by cylindrical void, range that can this sensor of translation.
For sensor is protected, can by add protective cover, dwindle two between the rod distance and on rod, open in mode such as caulking groove.
Claims (1)
1. easy fiber Bragg grating strain sensor of coupling, it mainly is made up of two rods and a bar of fiber grating, series connection with it, it is characterized in that: on described bar, fix described two rods, and described fiber grating is connected with described two rods, make fiber grating have certain dependent variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201642560U CN201488708U (en) | 2009-07-16 | 2009-07-16 | Easily-coupled fiber bragg grating strain transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201642560U CN201488708U (en) | 2009-07-16 | 2009-07-16 | Easily-coupled fiber bragg grating strain transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201488708U true CN201488708U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201642560U Expired - Fee Related CN201488708U (en) | 2009-07-16 | 2009-07-16 | Easily-coupled fiber bragg grating strain transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201488708U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017663A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | Novel surface-mounted FBG (fiber bragg grating) displacement meter with adjustable measurement range |
| CN110375663A (en) * | 2019-08-08 | 2019-10-25 | 北京航空航天大学合肥创新研究院 | A kind of adjustable fiber grating strain measuring device of range |
-
2009
- 2009-07-16 CN CN2009201642560U patent/CN201488708U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017663A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | Novel surface-mounted FBG (fiber bragg grating) displacement meter with adjustable measurement range |
| CN103017663B (en) * | 2012-11-26 | 2015-07-29 | 山东大学 | The mounted range-adjustable Optical Fiber Grating Displacement Meter of a kind of Novel clock |
| CN110375663A (en) * | 2019-08-08 | 2019-10-25 | 北京航空航天大学合肥创新研究院 | A kind of adjustable fiber grating strain measuring device of range |
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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: 20100526 Termination date: 20120716 |