CN219798251U - Wide-range fiber grating strain sensor - Google Patents
Wide-range fiber grating strain sensor Download PDFInfo
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- CN219798251U CN219798251U CN202320714462.4U CN202320714462U CN219798251U CN 219798251 U CN219798251 U CN 219798251U CN 202320714462 U CN202320714462 U CN 202320714462U CN 219798251 U CN219798251 U CN 219798251U
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- 239000000835 fiber Substances 0.000 title claims abstract description 27
- 239000013307 optical fiber Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Length Measuring Devices By Optical Means (AREA)
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Abstract
The utility model discloses a wide-range fiber bragg grating strain sensor which comprises a first fixed plate, a first clamping piece, a second fixed plate and a second clamping piece, wherein the first clamping piece is arranged at the central position of the top of the first fixed plate, the second clamping piece is arranged at the central position of the top of the second fixed plate, a strain sensor body is clamped between the first clamping piece and the second clamping piece, a first mounting hole is formed in the first fixed plate, two groups of first mounting holes are formed in the first fixed plate, the first mounting holes are symmetrical with respect to the central position of the first fixed plate, a second mounting hole is formed in the second fixed plate, and two groups of second mounting holes are formed in the second fixed plate. The first clamping piece has certain elasticity, the second clamping piece also has certain elasticity, and the first clamping piece and the second clamping piece are clamped on the strain sensor body, so that the strain sensor body can be conveniently replaced through the functions of the first clamping piece and the second clamping piece.
Description
Technical Field
The utility model relates to the technical field of strain sensors, in particular to a wide-range fiber bragg grating strain sensor.
Background
The fiber grating is a diffraction grating formed by periodically changing the longitudinal refractive index in the fiber core through strong laser irradiation. The basic principle is that a specific position of the optical fiber is made into a grating region with a refractive index periodically distributed, so that light waves with specific wavelengths will be reflected in this region. The fiber bragg grating has the characteristics of high sensitivity, electromagnetic interference resistance, low insertion loss, small volume, light weight, chemical stability, intrinsic explosion resistance, corrosion resistance, passivity and the like, has the characteristic of absolute wavelength coding, and overcomes the defect that an intensity modulation sensor has to take measures to compensate the fluctuation of the output power of a light source, the loss of fiber connection and a coupler to influence a measurement result. And detecting the wavelength to obtain the strain information of the surface to be detected. The sensitivity and measuring range of wavelength drift quantity to strain are closely related to the packaging structure, and the fiber bragg grating sensor is widely applied, can be used for measuring changes of objects, such as displacement, temperature, pressure and the like, and can be used in applications of machine vision, automatic detection, control systems and the like. In addition, the strain sensor can also be used for measuring the flow of a medium, detecting the liquid level and displacement, measuring the abrasion of mechanical parts and the like, and the conventional fiber bragg grating strain sensor is generally fixed on a bracket through bolts, so that the strain sensor is inconvenient to replace and inconvenient to use.
Disclosure of Invention
The utility model aims to provide a fiber grating strain sensor to solve the problems that the prior fiber grating strain sensor proposed in the background art is generally fixed on a bracket through bolts, and the fiber grating strain sensor is inconvenient to replace and inconvenient to use.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a wide-range fiber bragg grating strain sensor, includes first fixed plate, first fastener, second fixed plate and second fastener, the central point at first fixed plate top is provided with first fastener, the central point at second fixed plate top is provided with the second fastener, the card has the strain sensor body between first fastener and the second fastener, the inside first mounting hole that is provided with of first fixed plate, first mounting hole is provided with two sets of on first fixed plate, first mounting hole is symmetrical about the central point of first fixed plate, the inside second mounting hole that is provided with of second fixed plate, the second mounting hole is provided with two sets of on the second fixed plate, the second mounting hole is symmetrical about the central point of second fixed plate.
Preferably, a first thread is arranged on one side of the outer part of the strain sensor body, a first nut is screwed on the outer part of the first thread, a first optical fiber is arranged on one side of the inner part of the first nut, and the first thread and the first nut play a role in connection.
Preferably, the first nut is internally provided with internal threads, and the internal threads of the first nut are engaged with the first threads.
Preferably, the bottom of the strain sensor body is connected with a second thread, a second nut is screwed outside the second thread, a second optical fiber is connected to the bottom inside the second nut, and the second thread and the second nut play a role in connection.
Preferably, the second nut is internally provided with an internal thread, and the internal thread of the second nut is meshed with the external thread of the second thread.
Preferably, the second clamping member has a certain elasticity, and the first clamping member also has a certain elasticity.
Compared with the prior art, the utility model has the beneficial effects that: the fiber bragg grating strain sensor has reasonable structure and has the following advantages:
(1) The effect that the sensor was convenient to install and change has been realized through being provided with first fixed plate, first fastener, second fixed plate and second fastener, therefore, during the use, through being provided with first fastener on first fixed plate, be provided with the second fastener at the top of second fixed plate, first fastener has certain elasticity, and the second fastener also has certain elasticity, and first fastener and second fastener card are on the strain sensor body, can conveniently change the effect of the strain sensor body from the effect through first fastener and second fastener.
(2) Through being provided with first screw thread, first nut, first optic fibre, second screw thread, second nut and the effect of second optic fibre convenience connection optic fibre, consequently, through being provided with first nut, be provided with the internal thread in the first nut, through the internal thread in the first nut and first screw thread mutually support, make things convenient for the installation of first optic fibre, then through being provided with the second nut, set up the internal thread in the second nut, through internal thread and second screw thread intermeshing in the second nut to the effect of second optic fibre is conveniently connected, device simple structure, the operation of being convenient for.
(3) The device is simple in structure and convenient to operate, and through being provided with first mounting hole on first fixed plate, through being provided with the second mounting hole on the second fixed plate, through the effect of first mounting hole and second mounting hole, make things convenient for the bolt to pass first mounting hole and second mounting hole and install.
Drawings
FIG. 1 is a schematic elevational view of the present utility model;
FIG. 2 is a schematic side view of the present utility model;
FIG. 3 is a schematic view of the bottom view of the present utility model;
fig. 4 is an enlarged schematic view of the structure of fig. 1 a according to the present utility model.
In the figure: 1. a first fixing plate; 2. a first mounting hole; 3. a first clamping piece; 4. a first thread; 5. a first nut; 6. a first optical fiber; 7. a strain sensor body; 8. a second fixing plate; 9. a second mounting hole; 10. a second clamping piece; 11. a second thread; 12. a second nut; 13. and a second optical fiber.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.
Referring to fig. 1-4, an embodiment of the present utility model is provided: the wide-range fiber bragg grating strain sensor comprises a first fixed plate 1, a first clamping piece 3, a second fixed plate 8 and a second clamping piece 10, wherein the first clamping piece 3 is arranged at the center position of the top of the first fixed plate 1, the second clamping piece 10 is arranged at the center position of the top of the second fixed plate 8, a strain sensor body 7 is clamped between the first clamping piece 3 and the second clamping piece 10, a first mounting hole 2 is arranged in the first fixed plate 1, two groups of first mounting holes 2 are arranged on the first fixed plate 1, the first mounting holes 2 are symmetrical with respect to the center position of the first fixed plate 1, a second mounting hole 9 is arranged in the second fixed plate 8, the second mounting holes 9 are symmetrical with respect to the center position of the second fixed plate 8, and through the first mounting holes 2 and the second mounting holes 9 which are arranged on the second fixed plate 8, the first mounting holes 2 and the second mounting holes 9 can conveniently pass through the first mounting holes 2 and the second mounting holes 9 under the action of the first mounting holes 2 and the second mounting holes 9;
the first clamping piece 3 is arranged on the first fixing plate 1, the second clamping piece 10 is arranged on the top of the second fixing plate 8, the first clamping piece 3 has certain elasticity, the second clamping piece 10 also has certain elasticity, the first clamping piece 3 and the second clamping piece 10 are clamped on the strain sensor body 7, and the strain sensor body 7 can be conveniently replaced through the action of the first clamping piece 3 and the second clamping piece 10;
a first thread 4 is arranged on one side of the outer part of the strain sensor body 7, a first nut 5 is screwed on the outer part of the first thread 4, a first optical fiber 6 is arranged on one side of the inner part of the first nut 5, an internal thread is arranged in the first nut 5, and the internal thread in the first nut 5 is meshed with the first thread 4;
the bottom of the strain sensor body 7 is connected with a second thread 11, a second nut 12 is screwed outside the second thread 11, a second optical fiber 13 is connected to the bottom inside the second nut 12, an internal thread is arranged inside the second nut 12, the internal thread inside the second nut 12 is meshed with the external thread of the second thread 11, the second clamping piece 10 has certain elasticity, and the first clamping piece 3 also has certain elasticity;
the internal thread in the first nut 5 is matched with the first thread 4, so that the first optical fiber 6 is convenient to install, then the second nut 12 is provided with the internal thread, and the internal thread in the second nut 12 is meshed with the second thread 11, so that the second optical fiber 13 is convenient to connect, and the device has a simple structure and is convenient to operate;
when the optical fiber sensor is used, the first mounting hole 2 is formed in the first fixing plate 1, the second mounting hole 9 is formed in the second fixing plate 8, bolts can conveniently penetrate through the first mounting hole 2 and the second mounting hole 9 and are mounted through the action of the first mounting hole 2 and the second mounting hole 9, the first fixing plate 1 and the second fixing plate 8 are mounted at proper positions, the first clamping piece 3 is arranged on the first fixing plate 1, the second clamping piece 10 is arranged on the top of the second fixing plate 8, the first clamping piece 3 has certain elasticity, the second clamping piece 10 also has certain elasticity, the first clamping piece 3 and the second clamping piece 10 are clamped on the strain sensor body 7, the strain sensor body 7 can be conveniently replaced through the action of the first clamping piece 3 and the second clamping piece 10, the first threads 4 are mutually matched through internal threads in the first nuts 5, the first optical fibers 6 are conveniently mounted, the second nuts 12 are arranged on the tops of the second fixing plate 1, the second clamping piece 12 are arranged in the second nuts 12, and the second nuts 11 are meshed with the internal threads through the second nuts 13, and the operation of the second nuts is simple, and the operation is convenient.
Claims (6)
1. A wide-range fiber bragg grating strain sensor is characterized in that: including first fixed plate (1), first fastener (3), second fixed plate (8) and second fastener (10), the central point at first fixed plate (1) top puts and is provided with first fastener (3), the central point at second fixed plate (8) top puts and is provided with second fastener (10), the card has strain sensor body (7) between first fastener (3) and second fastener (10), first fixed plate (1) inside is provided with first mounting hole (2), first mounting hole (2) are provided with two sets of on first fixed plate (1), first mounting hole (2) are symmetrical about the central point of first fixed plate (1), second fixed plate (8) inside is provided with second mounting hole (9), second mounting hole (9) are provided with two sets of on second fixed plate (8) about the central point symmetry of second fixed plate (8).
2. The wide-range fiber bragg grating strain sensor of claim 1, wherein: one side of the outer portion of the strain sensor body (7) is provided with a first thread (4), a first nut (5) is screwed outside the first thread (4), and one side of the inner portion of the first nut (5) is provided with a first optical fiber (6).
3. A wide-range fiber bragg grating strain sensor as recited in claim 2, wherein: the inside of first nut (5) is provided with the internal thread, the internal thread in first nut (5) and first screw thread (4) intermesh.
4. The wide-range fiber bragg grating strain sensor of claim 1, wherein: the bottom of the strain sensor body (7) is connected with a second thread (11), a second nut (12) is screwed outside the second thread (11), and a second optical fiber (13) is connected to the bottom inside the second nut (12).
5. The wide-range fiber bragg grating strain sensor of claim 4, wherein: the second nut (12) is internally provided with internal threads, and the internal threads of the second nut (12) are mutually meshed with the external threads of the second threads (11).
6. The wide-range fiber bragg grating strain sensor of claim 1, wherein: the second clamping piece (10) has certain elasticity, and the first clamping piece (3) also has certain elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320714462.4U CN219798251U (en) | 2023-04-04 | 2023-04-04 | Wide-range fiber grating strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320714462.4U CN219798251U (en) | 2023-04-04 | 2023-04-04 | Wide-range fiber grating strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219798251U true CN219798251U (en) | 2023-10-03 |
Family
ID=88178040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320714462.4U Active CN219798251U (en) | 2023-04-04 | 2023-04-04 | Wide-range fiber grating strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219798251U (en) |
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2023
- 2023-04-04 CN CN202320714462.4U patent/CN219798251U/en active Active
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