CN205139169U - Acceleration sensor based on fiber grating - Google Patents
Acceleration sensor based on fiber grating Download PDFInfo
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- CN205139169U CN205139169U CN201520900142.3U CN201520900142U CN205139169U CN 205139169 U CN205139169 U CN 205139169U CN 201520900142 U CN201520900142 U CN 201520900142U CN 205139169 U CN205139169 U CN 205139169U
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- fiber grating
- uniform strength
- spring
- fixed
- housing
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Abstract
The utility model provides an acceleration sensor based on fiber grating, includes fiber grating, beam of constant strength, casing and spring, a fixed beam of constant strength on the inside wall of fiber grating acceleration sensor's casing, beam of constant strength's the other end is connected with the quality piece, and on two fiber grating were fixed in beam of constant strength, the lower extreme of quality piece was connected with the spring, and the other end of spring is fixed in the bottom of casing. Utilizing fiber grating to carry out the acceleration and detecting, avoid electromagnetic radiation's interference, measurement accuracy is high, and sensitivity can be adjusted, can eliminate the influence of temperature to acceleration measurement, have that simple structure, precision are high, long term stability is good, receive the characteristics that electromagnetic radiation disturbed.
Description
Technical field
The utility model belongs to optical fiber sensing detection technology field, is specifically related to a kind of acceleration transducer based on fiber grating.
Background technology
In engineer applied, the test of structural vibration can reflect the performance of structure, and therefore acceleration transducer is extremely important in the engineer applied of reality.Conventional acceleration transducer is intensity modulation type, digital, and this sensor has the interference being subject to electromagnetic radiation, the shortcoming such as long-time stability are poor, water proofing property is poor, cannot meet the needs of the medium-term and long-term disaster monitoring of engineer applied and harsh environments.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of acceleration transducer based on fiber grating, has the advantages that structure is simple, precision is high, long-time stability are good, be not subject to electromagnetic interference.
For achieving the above object, the technical solution adopted in the utility model is: a kind of acceleration transducer based on fiber grating, includes two fiber gratings, the beam of uniform strength, housing, mass, springs; The madial wall of housing fixes the beam of uniform strength; The other end of the beam of uniform strength is connected with mass; Two fiber gratings are fixed on the beam of uniform strength; The lower end of mass is connected with spring, and the other end of spring is fixed on the bottom of housing.
The described beam of uniform strength is connected with housing by screw.
Described spring is connected with housing by screw.
Described mass is connected with the free end of the beam of uniform strength by screw.
Two described fiber gratings are individually fixed on the center line of the upper surface of the beam of uniform strength, lower surface.
Compared with existing acceleration transducer, the utility model has the advantage of and utilize fiber grating to carry out acceleration detection, propose a kind of optical fibre grating acceleration method for sensing of novelty, the utility model inherits the advantage of semi-girder optical fiber grating sensing, easy and simple to handle, highly sensitive, dynamic range is large, grating infringement is little, there is good linear response degree to acceleration, the cross-sensitivity that temperature causes can be eliminated, adjust the sensitivity of sensor flexibly; In addition, the utility model structure is simple, and the interference of anti-electromagnetic-radiation, can be applied in the detection of the rugged surroundings such as Structural Engineering widely.
Fiber grating due to its there is electrical isolation, corrosion-resistant, measuring accuracy is high, structure is simple, volume is little, lightweight, power consumption less, sensitivity advantages of higher and become a kind of novel excellent sensing element.Because it adopts wavelength decoding technology, avoid light source power and loss to the impact of measuring, be applicable to long term monitoring; Simultaneously due to multiple grating can be carved over the same fiber, so just distributed measurement can be realized.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
See Fig. 1, a kind of acceleration transducer based on fiber grating comprises fiber grating 1 and 2, the beam of uniform strength 3, housing 6, mass 4, spring 5; The fixing described beam of uniform strength 3 on the madial wall of described housing 6, the other end of the described beam of uniform strength 3 is connected with described mass 4, described fiber grating 1 and 2 is fixed on the center line of the upper and lower surface of the described beam of uniform strength 3, the lower end of described mass 4 is connected with described spring 5, and the other end of described spring 5 is fixed on the bottom of described housing 6.
The described beam of uniform strength 3 is connected with housing 6 by screw.Described spring 5 is connected with housing 6 by screw.Described mass 4 is connected by the free end of screw with the beam of uniform strength 3.Described fiber grating 1,2 is individually fixed on the center line of the upper surface of the beam of uniform strength 3, lower surface.
The sensitivity of optical fibre grating acceleration sensor is changed by the quality of quality of regulation block 4 and the rigidity of spring 5.
Principle of work of the present utility model is:
This acceleration transducer is fixed on by geodesic structure, because two fiber gratings 1,2 are attached to the two sides of the beam of uniform strength, is in identical temperature field, thus eliminates temperature to the impact of measuring.When causing the beam of uniform strength 3 forced vibration when tested structural vibration, the centre wavelength of two fiber gratings 1,2 is drifted about respectively in opposite direction, then the change of the difference of two fiber bragg grating center wavelengths reflects by the vibration information of geodesic structure.
Claims (5)
1. based on an acceleration transducer for fiber grating, it is characterized in that, include two fiber gratings, the beam of uniform strength, housing, mass, springs; The madial wall of housing (6) is fixed the beam of uniform strength (3); The other end of the beam of uniform strength (3) is connected with mass (4); Two fiber gratings (1,2) are fixed on the beam of uniform strength (3); The lower end of mass (4) is connected with spring (5), and the other end of spring (5) is fixed on the bottom of housing (6).
2. a kind of acceleration transducer based on fiber grating according to claim 1, is characterized in that, the described beam of uniform strength (3) is connected with housing (6) by screw.
3. a kind of acceleration transducer based on fiber grating according to claim 1, is characterized in that, described spring (5) is connected with housing (6) by screw.
4. a kind of acceleration transducer based on fiber grating according to claim 1, is characterized in that, described mass (4) is connected by the free end of screw with the beam of uniform strength (3).
5. a kind of acceleration transducer based on fiber grating according to claim 1, is characterized in that, described two fiber gratings (1,2) are individually fixed on the center line of the upper surface of the beam of uniform strength (3), lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520900142.3U CN205139169U (en) | 2015-11-12 | 2015-11-12 | Acceleration sensor based on fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520900142.3U CN205139169U (en) | 2015-11-12 | 2015-11-12 | Acceleration sensor based on fiber grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205139169U true CN205139169U (en) | 2016-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520900142.3U Expired - Fee Related CN205139169U (en) | 2015-11-12 | 2015-11-12 | Acceleration sensor based on fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205139169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804281A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Sound wave vibration measuring device based on F-P optical fiber Fabry-Perot sensing principle |
-
2015
- 2015-11-12 CN CN201520900142.3U patent/CN205139169U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804281A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Sound wave vibration measuring device based on F-P optical fiber Fabry-Perot sensing principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20161112 |