CN203465288U - Wind speed sensor based on fiber Bragg grating - Google Patents
Wind speed sensor based on fiber Bragg grating Download PDFInfo
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- CN203465288U CN203465288U CN201320501544.7U CN201320501544U CN203465288U CN 203465288 U CN203465288 U CN 203465288U CN 201320501544 U CN201320501544 U CN 201320501544U CN 203465288 U CN203465288 U CN 203465288U
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- guide rod
- wind speed
- bragg grating
- optical fiber
- fiber bragg
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Abstract
A wind speed sensor based on a fiber Bragg grating is disclosed. The sensor of the utility model comprises a guide rod (8) and a fan blade (1) connected to an end of the guide rod (8). The guide rod (8) is supported on a support (9) by using two bearings (7). A cam (2) is inlaid between the two bearings (7) on the guide rod (8). A constant strength cantilever beam (3) is fixed on one bearing through using a bolt (5). A Bragg grating (4) is pasted on the constant strength cantilever beam (3). The Bragg grating (4) is connected with an optical fiber demodulation instrument through an optical fiber (6). The sensor of the utility model possesses the following advantages that an anti-interference capability is strong; a wind speed is used to influence a rotation speed of the fan blade; through monitoring a center wavelength shift frequency of the fiber Bragg grating, measurement of the wind speed is realized.
Description
Technical field
The utility model relates to a kind of air velocity transducer based on optical fiber Bragg raster, belongs to photoelectron field of measuring technique.
Background technology
Wind is a key factor that affects people's productive life, and the monitoring of wind speed is had to vital role in fields such as weather forecast, coal industry, electric system, navigations.At present, air velocity transducer adopts electronic type air velocity transducer more, such sensor detects the size of wind speed by electronic component, this kind of mode is easily subject to the impact of electromagnetic interference (EMI), and in some remote districts, the energy supply of such sensor is affected, can not realize the real time on-line monitoring to wind speed, and in some special ，Ru colliery, field and petroleum industry, the air velocity transducer of electronic type is not suitable for applying.Therefore, find a kind of anti-electromagnetic interference (EMI), energy supply air velocity transducer stable and essential safety significant.
With the utility model approach the most be " fiber Bragg grating type wind farm wind velocity long-range detector " (referring to patent: Ni Jiasheng, Wang Chang, etc." fiber Bragg grating type wind farm wind velocity long-range detector ", application for a patent for invention number: CN 101833014).The rotation of this patent utilization vane drives optical fiber Bragg raster centre wavelength to be shifted to reflect the size of wind speed, can overcome the impact of electromagnetic interference (EMI), but this patent cannot be measured the wind speed of specific direction.
Summary of the invention
The utility model object provides a kind of air velocity transducer based on optical fiber Bragg raster that can measure the wind speed of specific direction in order to overcome the weak point of above-mentioned prior art existence just.
The purpose of this utility model is to realize like this.
An air velocity transducer based on optical fiber Bragg raster, the utility model feature is: comprise guide rod and the fan blade that is connected to guide rod termination, guide rod adopts two bearings on support, studs with cam on guide rod between two bearings; On a bearing, be screwed equi intensity cantilever therein, be pasted with Bragg grating on equi intensity cantilever, Bragg grating is connected with optical fiber (FBG) demodulator by optical fiber.
Fan blade rotates under wind action, drive guide rod overhead cam to rotate with identical angular velocity, cam often rotates a circle and all can make the free end of equi intensity cantilever that a displacement occurs, that is: a centre wavelength displacement occurs the optical fiber Bragg raster that makes to stick on equi intensity cantilever.
The size of wind speed and the rotation of fan blade have certain correlationship, that is: the transposition frequency of the size of wind speed and the centre wavelength of optical fiber Bragg raster has certain correlationship, can reflect the size of wind speed by monitoring the transposition frequency of the centre wavelength of optical fiber Bragg raster.
the beneficial effects of the utility model: 1,realized the Measurement accuracy to wind speed: the utility model detects wind speed by the drift frequency of measuring optical fiber Bragg raster center wavelength, and monitoring accuracy is higher.2, antijamming capability is strong: therefore because optical fiber Bragg raster is electrically insulating material, there is anti-electromagnetic interference capability (EMI), and in the utility model structure without electrical type equipment, the utility model is applicable to the measuring wind speed under strong electromagnetic interference environment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, each label represents successively: fan blade (1), cam (2), equi intensity cantilever (3), optical fiber Bragg raster (4), screw (5), optical fiber (6), bearing (7), guide rod (8).
Embodiment
An air velocity transducer based on optical fiber Bragg raster, the utility model feature is: comprise guide rod 8 and the fan blade 1 that is connected to guide rod 8 terminations, guide rod 8 adopts two bearings 7 to be supported on support 9, studs with cam 2 on guide rod 8 between two bearings 7; On a bearing, with screw 5, be fixed with equi intensity cantilever 3 therein, be pasted with Bragg grating 4 on equi intensity cantilever 3, Bragg grating 4 is connected with optical fiber (FBG) demodulator by optical fiber 6.
Referring to Fig. 1, fan blade 1 rotates under wind action, drive guide rod 8 overhead cams 2 to rotate with identical angular velocity, cam 2 often rotates a circle and all can make the free end of equi intensity cantilever 3 that a displacement occurs, that is: a centre wavelength displacement occurs the optical fiber Bragg raster that makes to stick on equi intensity cantilever 3.By the frequency of monitoring optical fiber Bragg raster centre wavelength displacement, in conjunction with the correlationship of wind speed and fan blade rotating speed, can reflect the size of wind speed.The frequency of drifting about by the centre wavelength of monitoring optical fiber Bragg raster 4 can reflect the size of wind speed.
Claims (1)
1. the air velocity transducer based on optical fiber Bragg raster, it is characterized in that: comprise guide rod (8) and be connected to the fan blade (1) of guide rod (8) termination, it is upper that guide rod (8) adopts two bearings (7) to be supported in support (9), between the upper two bearings (7) of guide rod (8), studs with cam (2); On a bearing, with screw (5), be fixed with equi intensity cantilever (3) therein, be pasted with Bragg grating (4) on equi intensity cantilever (3), Bragg grating (4) is connected with optical fiber (FBG) demodulator by optical fiber (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320501544.7U CN203465288U (en) | 2013-08-16 | 2013-08-16 | Wind speed sensor based on fiber Bragg grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320501544.7U CN203465288U (en) | 2013-08-16 | 2013-08-16 | Wind speed sensor based on fiber Bragg grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203465288U true CN203465288U (en) | 2014-03-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320501544.7U Expired - Lifetime CN203465288U (en) | 2013-08-16 | 2013-08-16 | Wind speed sensor based on fiber Bragg grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203465288U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472253A (en) * | 2013-08-16 | 2013-12-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Wind speed sensor based on optical fiber Bragg raster |
| WO2021207093A1 (en) * | 2020-04-06 | 2021-10-14 | Nec Laboratories America, Inc. | Wind speed measurement using distributed fiber optic sensing |
-
2013
- 2013-08-16 CN CN201320501544.7U patent/CN203465288U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472253A (en) * | 2013-08-16 | 2013-12-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Wind speed sensor based on optical fiber Bragg raster |
| WO2021207093A1 (en) * | 2020-04-06 | 2021-10-14 | Nec Laboratories America, Inc. | Wind speed measurement using distributed fiber optic sensing |
| US11422146B2 (en) * | 2020-04-06 | 2022-08-23 | Nec Corporation | Wind speed measurement using distributed fiber optic sensing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140305 |