CN218411430U - Three-dimensional vibration sensor based on fiber grating - Google Patents
Three-dimensional vibration sensor based on fiber grating Download PDFInfo
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- CN218411430U CN218411430U CN202221118868.8U CN202221118868U CN218411430U CN 218411430 U CN218411430 U CN 218411430U CN 202221118868 U CN202221118868 U CN 202221118868U CN 218411430 U CN218411430 U CN 218411430U
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- sensor
- fiber grating
- displacement
- displacement sensor
- dimensional vibration
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 238000006073 displacement reaction Methods 0.000 claims abstract description 47
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000006355 external stress Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model provides a three-dimensional vibration sensor based on fiber grating, which comprises three displacement sensors with the same structure, wherein every two displacement sensors are orthogonally arranged, the shape of each displacement sensor is a square column, and the internal section of each displacement sensor is a square with equal side length; the inside central point of displacement sensor puts and to be provided with the gliding quality piece in the cavity, and one side central point of quality piece puts and connects fiber grating sensor and spring respectively, and spring one side and fiber grating sensor are connected, and the opposite side passes through calibration bolt on the top cap to link to each other, and the opposite side of quality piece passes through the attenuator and fixes the copper connecting rod on the bottom and link to each other, the utility model discloses the vibration of three direction of accurate detection simultaneously has advantages such as anti-interference, corrosion-resistant and easy network deployment.
Description
Technical Field
The utility model relates to a seismic exploration technical field especially relates to a three-dimensional vibration sensor based on fiber grating.
Background
Most of the existing seismic sensors adopt precise elements and complex circuit equipment, are complex in structure, high in cost, complex in operation and calculation, poor in fatigue resistance and durability, and far from the significance of full-life monitoring. The fiber grating sensor is a novel sensor appearing in recent years, a grating area is used as a sensor position, the environment temperature and displacement change is detected by using broadband low-energy laser to filter a light source with a certain characteristic frequency spectrum through a waveguide type grating in a fiber core, when the environment temperature and the external stress change, the fiber core can extend or contract, so that the grating interval changes, the linearity of the central wavelength of reflected light also changes, and the change condition of strain can be calculated by monitoring the change of the wavelength.
Therefore, CN 216285754U discloses a horizontal bidirectional seismic sensor based on fiber bragg grating, and a novel horizontal bidirectional seismic sensor is designed by adopting the fiber bragg grating sensor technology, and the sensor can only detect vibration in two directions, and has a complex structure, so that the application range is limited.
Compared with other environmental temperature and displacement detection technologies, the fiber grating sensor has the advantages of explosion resistance, interference resistance, radiation resistance, corrosion resistance, light weight, high temperature resistance and the like, and is widely applied to the fields of aviation, ships, electric power, petroleum and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a three-dimensional vibration sensor based on fiber grating to solve the problem that above-mentioned prior art exists.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a three-dimensional vibration sensor based on fiber bragg grating, which comprises three displacement sensors with the same structure and arranged orthogonally in pairs; the displacement sensor is a square cylinder in shape, and the inner section of the displacement sensor is a square with the same side length; a mass block is arranged at the central position in the displacement sensor and can slide in the cavity; the center of one side of the mass block is respectively connected with the fiber grating sensor and the spring; one side of the spring is connected with the fiber bragg grating sensor, and the other side of the spring is connected with the fiber bragg grating sensor through a calibration bolt on the top cover; the other side of the mass block is connected with a copper connecting rod fixed on the bottom cover through a damper;
preferably, the three displacement sensors are orthogonal to each other two by two, and two of the displacement sensors are horizontally arranged.
Preferably, the internal cross section of the displacement sensor mass block is a square with equal side length at each position.
Preferably, the cross section of the displacement sensor mass is the same as the inner cross section of the displacement sensor, and the displacement sensor mass can slide in the displacement sensor inner cavity.
Preferably, the bottom cover and the mass block of the displacement sensor are provided with through holes, and the optical fiber can be led out from the bottom cover through the through holes.
Preferably, the mass material is copper.
Preferably, the shell of the displacement sensor is made of copper, and the spring is a nonmagnetic compression spring.
The utility model discloses a following technological effect:
(1) The fiber grating sensor of the utility model uses the optical fiber with stable physical property as the detection material, is more suitable for working under severe environment than the metal common sensor, and can realize precise and accurate measurement by measuring the wavelength of the reflected light incident on the grating after the fiber grating receives the external stress;
(4) The utility model measures the vibration signal in three dimensions, and the adopted fiber grating sensor technology can obtain high-precision three-dimensional vector vibration data;
(4) The utility model discloses a fiber grating sensor can establish ties the network deployment, realizes the remote distributed measurement of measurement objective.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a front view of the structure of the present invention;
fig. 2 is a cross-sectional view of the displacement sensor of the present invention;
fig. 3 is an assembly view of the displacement sensor of the present invention;
fig. 4 is a front view of the middle angle joint of the present invention.
Wherein: 1. a displacement sensor; 2. a corner connector; 3. a bottom cover; 4. a housing; 5. a connecting rod; 6. a damper; 7. a mass block; 8. a fiber grating sensor; 9. a spring; 10. a top cover; 11. calibrating the bolt; 12. an optical fiber.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and embodiments:
in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to achieve the above object, the utility model provides a following scheme:
as shown in fig. 1-4, the utility model provides a three-dimensional vibration sensor based on fiber grating, which comprises three displacement sensors 1 with the same structure, wherein every two displacement sensors are orthogonally arranged, the shape of each displacement sensor 1 is a square column, and the internal section is a square with equal side length; the displacement sensor comprises a displacement sensor 1, a mass block 7 capable of sliding in a cavity is arranged at the center inside the displacement sensor 1, the center of one side of the mass block 7 is respectively connected with a fiber grating sensor 8 and a spring 9, one side of the spring 9 is connected with the fiber grating sensor 8, the other side of the spring is connected with a calibration bolt 11 on a top cover 10, the other side of the mass block 7 is connected with a copper connecting rod 5 fixed on a bottom cover through a damper 6, the bottom cover 3 and the mass block 7 are both provided with through holes, and an optical fiber 12 can be led out from the bottom cover through the two holes.
When using, need adjust three displacement sensor's calibration bolt 11 at first, coupling effect when avoiding unidirectional transducer to measure is unified as a value with displacement sensor's in the three dimension reflection wavelength, then fixes a position three displacement sensor's spatial position, guarantees in the vector two liang of quadrature that radially constitute separately, and after the vibration takes place, the inside quality piece 7 of displacement sensor 1 can take place to move in opposite directions or back of the body mutually, can obtain the vibration amplitude in three direction through grating optical fiber demodulator.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and therefore, the protection scope of the present invention cannot be limited thereby. All equivalent changes or modifications made according to the spirit of the present invention are covered in the protection scope of the present invention.
Claims (8)
1. A three-dimensional vibration sensor based on fiber bragg gratings is characterized in that three displacement sensors (1) with the same structure and arranged orthogonally in pairs are connected and fixed through an angle connector (2), a shell (4) of each displacement sensor (1) is a square column, and the inner section of each displacement sensor is a square with equal side length; the displacement sensor is characterized in that a mass block (7) capable of sliding in the cavity is arranged at the center inside the displacement sensor (1), the center of one side of the mass block (7) is connected with a fiber grating sensor (8) and a spring (9) respectively, one side of the spring (9) is connected with the fiber grating sensor (8), the other side of the spring is connected with a calibration bolt (11) on the top cover, and the other side of the mass block (7) is connected with a copper connecting rod (5) fixed on the bottom cover (3) through a damper (6).
2. A fiber grating based three dimensional vibration sensor as in claim 1 wherein the internal cross section of the mass (7) of the displacement sensor (1) is square with equal side length at each location.
3. The fiber grating-based three-dimensional vibration sensor as claimed in claim 1, wherein the cross section of the mass (7) of the displacement sensor (1) is the same as the inner cross section of the displacement sensor, and the mass can slide in the inner cavity of the displacement sensor (1).
4. A fiber grating based three dimensional vibration transducer according to claim 1, wherein the bottom cover (3) and the mass (7) of the displacement transducer (1) are provided with through holes through which the optical fibers can be led out from the bottom cover.
5. A fiber grating based three dimensional vibration sensor according to claim 1, wherein the mass (7) of the displacement sensor (1) is made of copper.
6. The fiber grating-based three-dimensional vibration sensor according to claim 1, wherein the housing (4) of the displacement sensor (1) is made of copper, and the spring is a nonmagnetic compression spring.
7. A fiber grating based three dimensional vibration transducer according to claim 1, wherein the bottom cover (3) and the mass (7) of the displacement transducer (1) are provided with through holes through which the optical fibers (12) can be led out from the bottom cover.
8. The fiber grating-based three-dimensional vibration sensor as claimed in claim 1, wherein the vertex angle of the angle connector (2) is provided with an exit hole for the optical fiber (12) of the three displacement sensors (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221118868.8U CN218411430U (en) | 2022-05-11 | 2022-05-11 | Three-dimensional vibration sensor based on fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221118868.8U CN218411430U (en) | 2022-05-11 | 2022-05-11 | Three-dimensional vibration sensor based on fiber grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218411430U true CN218411430U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221118868.8U Expired - Fee Related CN218411430U (en) | 2022-05-11 | 2022-05-11 | Three-dimensional vibration sensor based on fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218411430U (en) |
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2022
- 2022-05-11 CN CN202221118868.8U patent/CN218411430U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230131 |