CN203688576U - Fiber Bragg grating dynamic anemoclinograph - Google Patents
Fiber Bragg grating dynamic anemoclinograph Download PDFInfo
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- CN203688576U CN203688576U CN201320819300.3U CN201320819300U CN203688576U CN 203688576 U CN203688576 U CN 203688576U CN 201320819300 U CN201320819300 U CN 201320819300U CN 203688576 U CN203688576 U CN 203688576U
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- impeller
- weathervane
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- 239000013307 optical fiber Substances 0.000 claims description 31
- 239000000835 fiber Substances 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
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Abstract
The utility model relates to a fiber Bragg grating dynamic anemoclinograph and belongs to the technical field of photoelectron measurement equipment, which comprises an impeller, an impeller rotating shaft, a rotating speed cam, a vane rotating shaft, an empennage, a bearing, fastening screws, a direction cam, a fiber Bragg grating, constant-strength cantilever beams, a base, and an angle cam. The impeller rotating shaft is connected with the impeller. The impeller rotating shaft is provided with the rotating speed cam. One side of the impeller rotating shaft is provided with the constant-strength cantilever beams and the constant-strength cantilever beams are fixedly connected with the vane rotating shaft through the fastening screws. The vane rotating shaft is connected with the base through the bearing. The vane rotating shaft is provided with the direction cam and the angle cam. The two sides of the vane rotating shaft are provided with the constant-strength cantilever beams. The constant-strength cantilever beams are fixed onto the base. The fiber Bragg grating is stuck onto a central axis on the surfaces of the constant-strength cantilever beams. According to the technical scheme of the utility model, the fiber Bragg grating is adopted as a sensing element to realize the dynamic on-line supervision over the wind speed and the wind direction in real time.
Description
Technical field
The utility model relates to a kind of optical fiber Bragg raster Dynamic Wind Speed wind indicator, belongs to photoelectron measuring element technical field.
Background technology
Wind speed and direction measuring technique application is very extensive: as at meteorological field, for the monitoring of typhoon provides accurate data; In civil aviaton field, for takeoff and landing provide reliable wind speed and direction reference; Highway bridge construction, for its design and construction provides foundation; At new energy field, especially wind power generation field, surveys wind technology and has important effect.At present conventional wind speed and direction monitoring method has: mechanical type method, Pitot tube method, hot line Thermomembrane method, supercritical ultrasonics technology etc.In wind power generation field, the wind measuring system being most widely used is mechanical type wind measuring system, and it is simple in structure, linear relationship good, response is fast, precision is good.
With the immediate technology of the utility model be Wang Chang, Ni Jiasheng, in the Wang Ji wind-power electricity generation that people such as grade proposes by force, full fiber wind speed sensor and Study on manufacturing process are (referring to document: Wang Chang, Ni Jiasheng, Wang Ji is strong etc., full fiber wind speed sensor and Study on manufacturing process in wind-power electricity generation, laser technology, 2012).In document, adopt wind-cup type air velocity transducer structure, can only carry out monitoring to wind field wind speed, cannot monitor wind field wind direction.
Summary of the invention
Problem to be solved in the utility model is: a kind of optical fiber Bragg raster Dynamic Wind Speed wind indicator is provided, has adopted impeller-weathervane structure, realized the in real time dynamic on-line monitoring to wind speed and direction.
Technical solutions of the utility model are: a kind of optical fiber Bragg raster Dynamic Wind Speed wind indicator, comprises impeller 1, impeller shaft 2, rotating speed cam 3, weathervane rotating shaft 4, empennage 5, bearing 6, holding screw 7, direction cam 8, optical fiber Bragg raster 9, equi intensity cantilever 10, base 11, angle cam 12, described impeller 1 is connected with impeller shaft 2, rotating speed cam 3 is set on impeller shaft 2, impeller shaft 2 one sides arrange equi intensity cantilever 10, equi intensity cantilever 10 is fixedly connected with weathervane rotating shaft 4 by holding screw 7, weathervane rotating shaft 4 is connected with base 11 by bearing 6, weathervane rotating shaft 4 afterbodys are provided with empennage 5, in weathervane rotating shaft 4, be provided with direction cam 8 and angle cam 12, weathervane rotating shaft 4 both sides are provided with equi intensity cantilever 10, equi intensity cantilever 10 is fixed on base 11, optical fiber Bragg raster 9 sticks on equi intensity cantilever 10 centre of surface axis.
One side of described rotating speed cam 3 is provided with a projection.
The half of described direction cam 8 circular arc circumference is provided with projection.
Described angle cam 12 is symmetrical arranged projection along circumference.
The utility model use procedure is:
Impeller 1 is by the moving rotation of wind, the larger rotating speed of wind speed is faster, impeller shaft 2 rotates and drives rotating speed cam 3 to rotate, rotating speed cam 3 often rotates a circle, equi intensity cantilever 10 is clashed in rotating speed cam 3 teat branches makes it produce amount of deflection variation and then cause surface light fiber Bragg grating 9 centre wavelengths that stick on equi intensity cantilever 10 to be shifted, wavelength variations is spread out of by optical fiber, utilize fiber Bragg grating (FBG) demodulator to count wavelength variations number of times, just can obtain by the counting obtaining all numbers that rotating speed cam 3 rotates, thereby obtain the gyro frequency of rotating speed cam
f, utilize formula
, try to achieve air speed value
, can realize wind speed is carried out to Real-Time Monitoring.
In the time of change of the wind, the empennage 5 of weathervane is rotated by wind-force, the rotation of weathervane rotating shaft 4 drives direction cam 8 and angle cam 12 to rotate to an angle, angle cam 12 outshots clash into equi intensity cantilever 10 makes it produce amount of deflection variation and then cause optical fiber Bragg raster 9 centre wavelengths that stick on equal strength cantilever 10 beam upper and lower surface central axis to be shifted, and measures this wavelength-shift amount
, within the scope of 180 ° of angle cam 12 axis of symmetry one sides, according to formula:
, can draw the weathervane anglec of rotation
abragg centre wavelength shift amount with optical fiber Bragg raster
linear, therefore can obtain the angle of weathervane rotation according to Bragg centre wavelength shift amount, coordinating the Bragg centre wavelength of being close on the equi intensity cantilever of direction cam 8 whether displacement occurs just can learn at 360 ° of scope internal rotation angle degree, the weathervane anglec of rotation is change of the wind angle, thereby calculate wind direction, realize wind direction is carried out to Real-Time Monitoring;
The Derivation of Mathematical Model of the utility model technology is as follows:
By optical fiber Bragg raster counting assembly, rotating speed cam often rotates a circle, count once, thus the gyro frequency of acquisition rotating speed cam
f, according to gyro frequency
fjust can calculate wind speed
v:
Can realize wind speed is carried out to Real-Time Monitoring, in formula, Z is impeller blade number,
βfor the structure angle of impeller blade, the mean radius that r is impeller blade.
When change of the wind angle
time the weathervane rotating shaft anglec of rotation
, the also anglec of rotation thereupon of angle cam
, the degree of disturbing that equi intensity cantilever produces
:
In formula, θ is the drift angle of angle cam projection, r
3for the radius of angle cam circular arc portion.The suffered dependent variable ε of equi intensity cantilever is:
(2) formula is obtained for people (3) formula:
And optical fiber Bragg raster wavelength shift and equi intensity cantilever free end strain stress relation formula can be expressed as:
(4) formula is obtained for people (5) formula:
Within the scope of 180 ° of angle cam axis of symmetry one side, can draw the weathervane anglec of rotation according to (6) formula
abragg centre wavelength shift amount with optical fiber Bragg raster
linear, the Bragg wavelength-shift amount of optical fiber Bragg raster
to change of the wind angle
aresponse sensitivity be:
Therefore can obtain the angle of weathervane rotation according to Bragg centre wavelength shift amount, coordinating the Bragg centre wavelength of being close on the equi intensity cantilever of direction cam whether displacement occurs just can learn at 360 ° of scope internal rotation angle degree, the weathervane anglec of rotation is change of the wind angle, thereby calculate wind direction, realize wind direction is carried out to Real-Time Monitoring;
Wherein, Z is impeller blade number,
βfor the structure angle of impeller blade, the mean radius that r is impeller blade, θ is the drift angle of angle cam projection, r
3for the radius of angle cam circular arc portion, p
efor the valid round-backscatter extinction logarithmic ratio of optical fiber, h
bfor the thickness of equi intensity cantilever,
lfor the length of equi intensity cantilever,
afor change of the wind angle, λ
bfor the centre wavelength of optical fiber Bragg raster,
for the centre wavelength shift amount of optical fiber Bragg raster.
The beneficial effects of the utility model are:
1. realized the in real time dynamic on-line monitoring to wind speed: the utility model adopts blade wheel structure, the equi intensity cantilever and the impeller shaft that are pasted with optical fiber Bragg raster are made into counting assembly, the amount of deflection of equi intensity cantilever is changed to the displacement variable quantity that is converted to optical fiber Bragg raster centre wavelength, count according to wavelength variations number of times, thereby calculate wind speed, realized the in real time dynamic on-line monitoring of wind speed.
2. realized the in real time dynamic on-line monitoring to wind direction: the utility model adopts weathervane structure, in weathervane rotating shaft, setting party is to cam and angle cam, determine the angle of weathervane rotation by direction cam and angle cam, thereby calculate wind direction, realized the in real time dynamic on-line monitoring of wind direction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of rotating speed cam;
Fig. 3 is the structural representation of direction cam;
Fig. 4 is the structural representation of angle cam.
Each label in Fig. 1: 1-impeller, 2-impeller shaft, 3-rotating speed cam, the rotating shaft of 4-weathervane, 5-empennage, 6-bearing, 7-holding screw, 8-direction cam, 9-optical fiber Bragg raster, 10-equi intensity cantilever, 11-base, 12-angle cam.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1: as Figure 1-4, a kind of optical fiber Bragg raster Dynamic Wind Speed wind indicator, comprises impeller 1, impeller shaft 2, rotating speed cam 3, weathervane rotating shaft 4, empennage 5, bearing 6, holding screw 7, direction cam 8, optical fiber Bragg raster 9, equi intensity cantilever 10, base 11, angle cam 12, described impeller 1 is connected with impeller shaft 2, rotating speed cam 3 is set on impeller shaft 2, impeller shaft 2 one sides arrange equi intensity cantilever 10, equi intensity cantilever 10 is fixedly connected with weathervane rotating shaft 4 by holding screw 7, weathervane rotating shaft 4 is connected with base 11 by bearing 6, weathervane rotating shaft 4 afterbodys are provided with empennage 5, in weathervane rotating shaft 4, be provided with direction cam 8 and angle cam 12, weathervane rotating shaft 4 both sides are provided with equi intensity cantilever 10, equi intensity cantilever 10 is fixed on base 11, optical fiber Bragg raster 9 sticks on equi intensity cantilever 10 centre of surface axis, one side of described rotating speed cam 3 is provided with a projection, the half of described direction cam 8 circular arc circumference is provided with projection, described angle cam 12 is symmetrical arranged projection along circumference.
In concrete enforcement, impeller blade is counted Z=3, the structure angle of impeller blade
β=30 °, the mean radius r=20 cm of impeller blade, the gyro frequency of rotating speed cam
f=10Hz, by these data substitution formula (1), tries to achieve wind speed
vfor:
meter per second, thus measure wind speed
v; The initial center wavelength that obtains optical fiber Bragg raster with fiber Bragg grating (FBG) demodulator is λ
b=1550nm, valid round-backscatter extinction logarithmic ratio is p
e=0.22, the drift angle of angle cam projection
θ=3o, the radius r of angle cam circular arc portion
3=20mm, the length of equi intensity cantilever
l=65mm, the thickness h of equi intensity cantilever
b=2 mm, the width B=10mm of equi intensity cantilever stiff end, the free-ended width b=2mm of equi intensity cantilever, by these data substitution formula (7), tries to achieve the Bragg wavelength-shift amount of optical fiber Bragg raster
to change of the wind angle
aresponse sensitivity be:
micromicron/degree.
Result of calculation shows, the wind direction sensitivity of this anemoclinograph is 10 micromicrons/degree.Therefore,, in the time that the wavelength resolution of optical fiber Bragg raster (FBG) demodulator is 1pm, the resolution of this sensor is 0.1o.
By reference to the accompanying drawings specific embodiment of the utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make various variations.
Claims (4)
1. an optical fiber Bragg raster Dynamic Wind Speed wind indicator, is characterized in that: comprise impeller (1), impeller shaft (2), rotating speed cam (3), weathervane rotating shaft (4), empennage (5), bearing (6), holding screw (7), direction cam (8), optical fiber Bragg raster (9), equi intensity cantilever (10), base (11), angle cam (12), described impeller (1) is connected with impeller shaft (2), rotating speed cam (3) is set on impeller shaft (2), impeller shaft (2) one sides arrange equi intensity cantilever (10), equi intensity cantilever (10) is fixedly connected with weathervane rotating shaft (4) by holding screw (7), weathervane rotating shaft (4) is connected with base (11) by bearing (6), weathervane rotating shaft (4) afterbody is provided with empennage (5), in weathervane rotating shaft (4), be provided with direction cam (8) and angle cam (12), weathervane rotating shaft (4) both sides are provided with equi intensity cantilever (10), equi intensity cantilever (10) is fixed on base (11), optical fiber Bragg raster (9) sticks on equi intensity cantilever (10) centre of surface axis.
2. optical fiber Bragg raster Dynamic Wind Speed wind indicator according to claim 1, is characterized in that: a side of described rotating speed cam (3) is provided with a projection.
3. optical fiber Bragg raster Dynamic Wind Speed wind indicator according to claim 1, is characterized in that: the half of described direction cam (8) circular arc circumference is provided with projection.
4. optical fiber Bragg raster Dynamic Wind Speed wind indicator according to claim 1, is characterized in that: described angle cam (12) is symmetrical arranged projection along circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819300.3U CN203688576U (en) | 2013-12-13 | 2013-12-13 | Fiber Bragg grating dynamic anemoclinograph |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819300.3U CN203688576U (en) | 2013-12-13 | 2013-12-13 | Fiber Bragg grating dynamic anemoclinograph |
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| Publication Number | Publication Date |
|---|---|
| CN203688576U true CN203688576U (en) | 2014-07-02 |
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|---|---|---|---|
| CN201320819300.3U Expired - Fee Related CN203688576U (en) | 2013-12-13 | 2013-12-13 | Fiber Bragg grating dynamic anemoclinograph |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675330A (en) * | 2013-12-13 | 2014-03-26 | 昆明理工大学 | Dynamic anemorumbometer of optical fiber Bragg optical gratings and use method of anemorumbometer |
| CN106597008A (en) * | 2016-12-05 | 2017-04-26 | 北京普华亿能风电技术有限公司 | Wind measuring method resistant to wind shadow of an anemometer tower |
| CN109459584A (en) * | 2018-11-29 | 2019-03-12 | 大连海英科技有限公司 | A kind of wind vane and rapid-setting method that can be quickly arranged |
| CN109989879A (en) * | 2019-04-22 | 2019-07-09 | 杭州柔晴电子商务有限公司 | A kind of wind electric power generation fan blade |
| CN110988388A (en) * | 2019-12-24 | 2020-04-10 | 石家庄铁道大学 | Fiber grating wind speed and direction sensor |
| CN113514663A (en) * | 2021-05-07 | 2021-10-19 | 东南大学 | Wind speed and direction measuring device for directing incoming flow |
-
2013
- 2013-12-13 CN CN201320819300.3U patent/CN203688576U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675330A (en) * | 2013-12-13 | 2014-03-26 | 昆明理工大学 | Dynamic anemorumbometer of optical fiber Bragg optical gratings and use method of anemorumbometer |
| CN106597008A (en) * | 2016-12-05 | 2017-04-26 | 北京普华亿能风电技术有限公司 | Wind measuring method resistant to wind shadow of an anemometer tower |
| CN109459584A (en) * | 2018-11-29 | 2019-03-12 | 大连海英科技有限公司 | A kind of wind vane and rapid-setting method that can be quickly arranged |
| CN109459584B (en) * | 2018-11-29 | 2023-11-03 | 大连海英科技有限公司 | Wind vane capable of being quickly set and quick setting method |
| CN109989879A (en) * | 2019-04-22 | 2019-07-09 | 杭州柔晴电子商务有限公司 | A kind of wind electric power generation fan blade |
| CN109989879B (en) * | 2019-04-22 | 2020-12-29 | 广西电网有限责任公司电力科学研究院 | Wind energy detection device |
| CN110988388A (en) * | 2019-12-24 | 2020-04-10 | 石家庄铁道大学 | Fiber grating wind speed and direction sensor |
| CN113514663A (en) * | 2021-05-07 | 2021-10-19 | 东南大学 | Wind speed and direction measuring device for directing incoming flow |
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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 |
Granted publication date: 20140702 Termination date: 20151213 |
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| EXPY | Termination of patent right or utility model |