CN103076465A - Double-half-hole-beam differential type fiber bragg grating acceleration sensor - Google Patents
Double-half-hole-beam differential type fiber bragg grating acceleration sensor Download PDFInfo
- Publication number
- CN103076465A CN103076465A CN2013100143227A CN201310014322A CN103076465A CN 103076465 A CN103076465 A CN 103076465A CN 2013100143227 A CN2013100143227 A CN 2013100143227A CN 201310014322 A CN201310014322 A CN 201310014322A CN 103076465 A CN103076465 A CN 103076465A
- Authority
- CN
- China
- Prior art keywords
- fiber bragg
- bragg grating
- circular
- hole
- walking beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a double-half-hole-beam differential type fiber bragg grating acceleration sensor. The double-half-hole-beam differential type fiber bragg grating acceleration sensor is characterized in that an upper semicircular hole is manufactured on the upper surface of a vibrating beam, and a lower semicircular hole is manufactured on the lower surface of the vibrating beam; the arc surface of the upper semicircular hole is positioned on the arc surface which is bent upwards on the lower surface of the vibrating beam; the central plane of the semicircular arc surface of the upper semicircular hole and the central plane of a semicircular arc surface of the lower semicircular hole are positioned in the same plane vertical to the upper surface; the distance between the bottom part of the upper semicircular arc surface and the top part of the lower semicircular arc surface is 2-10mm; the part of the upper surface of the vibrating beam, which is provided with a grating, is positioned at an upper fiber bragg grating on the diameter plane of the upper semicircular hole, and the part of the lower surface of the vibrating beam, which is provided with a grating, is positioned at a lower fiber bragg grating on the diameter plane of the lower semicircular hole; and the upper fiber bragg grating and the lower upper fiber bragg grating are connected in series or in parallel in an end-to-end manner. The double-half-hole-beam differential type fiber bragg grating acceleration sensor disclosed by the invention can be used for measuring the vibration acceleration of bridges and fixed buildings.
Description
Technical field
The invention belongs to the fiber optic sensor technology field, be specifically related to be used to the sensor that relates to for acceleration measurement.
Background technology
The basic sensing principle of optical fibre grating acceleration sensor is the stressed dependent variable that amount of acceleration is converted to Fiber Bragg Grating FBG of utilizing flexible member, thereby be converted into the variation of bragg wavelength, realize measurement to acceleration amplitude by the variation that detects wavelength.As a kind of novel optical passive component, optical fibre grating acceleration sensor has advantages of that many electromagnetism class acceleration transducers are incomparable, such as highly sensitive, wide dynamic range, be not subjected to electromagnetic interference (EMI), anticorrosive, loss is little, reliability is high, volume is little, the characteristics such as lightweight, and having the impact that transducing signal is not subjected to the factors such as light source fluctuating, optical path loss, antijamming capability is strong, sensing probe is simple in structure, be easy to use wavelength-division multiplex technique and form the characteristics such as distributed measurement.Therefore optical fibre grating acceleration sensor also becomes the direction of a new research and development, and has been successfully applied to the aspects such as seismic prospecting, covil construction and aeronautic measurement.
Natural frequency and sensitivity are two important indicators of acceleration transducer.Sensitivity has determined the size of acceleration transducer resolution characteristic, and natural frequency then determines the frequency range that it is applicable, and these two indexs have just determined the use field of acceleration transducer, must be taken into full account when the design acceleration sensor.But natural frequency and sensitivity are inversely proportional to, and the relation of therefore optimizing natural frequency and sensitivity is the key problem that domestic and international researchers pay close attention to always.A.Mita etc., M.D.Todd etc. and the FBG acceleration transducer of J.H.Zhang philosophy proposition based on single-beam, twin beams and many girder constructions, the FBG packaging technology adopts complete sticking formula encapsulation scheme, sensitivity based on the accelerometer of single-beam and many girder constructions is respectively 498 μ ε/g and 410.7pm/g, but frequency band is narrower, the acceleration transducer of twin beams, frequency band increases, but packaging technology all easily causes chirped grating, causes nonlinear distortion.Liu Qinpeng etc. have proposed the optical fiber Bragg acceleration transducer design of 2 encapsulation, can effectively avoid chirped grating, but the sensitivity of acceleration are lower, and sensitivity is 3.88pm/ (m/s
2).
Summary of the invention
Technical matters to be solved by this invention is to overcome the shortcoming of above-mentioned optical fibre grating acceleration sensor, and two half hole beam differential optical fiber Bragg grating acceleration transducers of a kind of reasonable in design, simple in structure, natural frequency and sensitivity optimization are provided.
Solving the problems of the technologies described above the technical scheme that adopts is: be manufactured with first circular port in walking beam upper surface left side, the walking beam upper surface is provided with grating and partly is positioned at upper Fiber Bragg Grating FBG on first circular bore dia plane, be manufactured with the lower semi-circular hole in walking beam lower surface left side, the arc surface of first circular port is positioned at the reclinate arc surface of walking beam upper surface, the arc surface in lower semi-circular hole is positioned at the arc surface that the walking beam lower surface is bent upwards, the central plane of the semicircle cambered surface of first circular port is positioned at the same plane vertical with upper surface with the central plane of the semicircle cambered surface in lower semi-circular hole, the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 2～10mm, the walking beam lower surface is provided with grating and partly is positioned at lower Fiber Bragg Grating FBG on the lower semi-circular bore dia plane, upper Fiber Bragg Grating FBG and lower Fiber Bragg Grating FBG head and the tail serial or parallel connection.
The aperture in first circular port of the present invention and lower semi-circular hole is 13～30mm.
The aperture of first circular port of the present invention is identical with the aperture in lower semi-circular hole.
The distance at the top of the bottom of first circular cambered surface of the present invention and lower semi-circular cambered surface is 2～10mm.
The wavelength of upper Fiber Bragg Grating FBG of the present invention is 1520nm～1545nm or 1555nm～1620nm, and the wavelength of lower Fiber Bragg Grating FBG is 1520nm～1545nm or 1560nm～1620nm.
The walking beam of sensor adopts the DC-160 elastomer silicone to pour in mould and forms, the walking beam that this material is made, and elastic modulus is little, keeps good elasticity in 0～200 ℃; Be manufactured with first circular port at the walking beam upper surface, lower surface is manufactured with first circular port, the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 2～10mm, sensitivity coefficient is compared with the optical fiber Bragg acceleration transducer of comparable size, have the advantages such as volume is little, Hz-KHz is wide, sensitivity is high, its sensitivity is 33 times of optical fiber Bragg acceleration transducer sensitivity.The present invention is installed on bridge and the fixed buildings, in conjunction with optical fiber sensing network, can be used for measuring the vibration acceleration of bridge and fixed buildings.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the upward view of Fig. 1.
Fig. 4 is the spectrogram of the embodiment of the invention 1.
Fig. 5 is the linear response figure of the embodiment of the invention 1.
Fig. 6 is that the embodiment of the invention 1 is 1m/s in the sine wave speed of input
2Output response diagram when frequency is 20Hz.
Fig. 7 is that the embodiment of the invention 1 is 2m/s in the sine wave speed of input
2Output response diagram when frequency is 30Hz.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
In Fig. 1,2,3, two half hole beam differential optical fiber Bragg grating acceleration transducers of the present embodiment are made of walking beam 1, upper Fiber Bragg Grating FBG 2,3 connections of lower Fiber Bragg Grating FBG.
The walking beam 1 of the present embodiment is to be poured in mould by the DC-160 elastomer silicone to form, the DC-160 elastomer silicone is the commodity of selling on the market, sold by U.S. Dowcorning company, two kinds of fluent materials, during use two kinds of fluent materials are blended in injection molded in the mould, the walking beam 1 that this material is made, elastic modulus is little, keeps good elasticity in 0～200 ℃.It is the semicircle cambered surface of 20mm that the left side injection molded of walking beam 1 upper surface of the present embodiment has diameter, consist of first circular port, the arc surface of first circular port is positioned at the reclinate arc surface of walking beam 1 upper surface, it is the semicircle cambered surface of 20mm that the left side injection molded of walking beam 1 lower surface has diameter, consist of the lower semi-circular hole, the arc surface in lower semi-circular hole is positioned at the arc surface that walking beam 1 lower surface is bent upwards, the central plane of the semicircle cambered surface of first circular port is positioned at the same plane vertical with upper surface with the central plane of the semicircle cambered surface in lower semi-circular hole, and the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 5mm.Be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1555nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1560nm.Also available 502 glue are bonded in upper Fiber Bragg Grating FBG 2 upper surface of walking beam 1, the lower Fiber Bragg Grating FBG 3 usefulness 502 gluing lower surfaces that are connected on walking beam 1, and 502 glue are the commodity of selling on the market, company limited sells by Taizhou plain multi-purpose adhesive industry.Upper Fiber Bragg Grating FBG 2 and lower Fiber Bragg Grating FBG 3 head and the tail series connections also can and connect.Two half hole beam differential optical fiber Bragg grating acceleration transducers of this structure, during use, the left end of walking beam 1 is fixed, but right-hand member easy on and off vibration, inertial mass and elastic system are integrated, and semi-circular hole partly is the stress sensitive zone, is the spring section of quality-spring system, right-hand member is the inertial mass part of quality-spring system, consists of a single-degree-of-freedom undamped acceleration sensing system.When walking beam 1 right side vibrates in the vertical direction, walking beam 1 right side is done and is accelerated vibration, cause that Fiber Bragg Grating FBG is flexible, cause the drift of Fiber Bragg Grating FBG wavelength, restore the drift value that vibration signal draws Fiber Bragg Grating FBG centre wavelength by the dynamic demodulation instrument, and draw the frequency of extraneous vibration signal and the information of acceleration amplitude.The present invention is installed on bridge and the fixed buildings, in conjunction with optical fiber sensing network, can be used as the vibration acceleration of measuring bridge and fixed buildings.
In the present embodiment, at the left side injection molded of walking beam 1 upper surface diameter being arranged is the semicircle cambered surface of 13mm, consist of first circular port, it is the semicircle cambered surface of 13mm that the left side injection molded of walking beam 1 lower surface has diameter, consist of the lower semi-circular hole, the central plane of the semicircle cambered surface of first circular port is positioned at the same plane vertical with upper surface with the central plane of the semicircle cambered surface in lower semi-circular hole, and the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 2mm.Be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1580nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1580nm.The method for making of walking beam 1 and used material are identical with embodiment 1.
In the present embodiment, at the left side injection molded of walking beam 1 upper surface diameter being arranged is the semicircle cambered surface of 30mm, consist of first circular port, it is the semicircle cambered surface of 30mm that the left side injection molded of walking beam 1 lower surface has diameter, consist of the lower semi-circular hole, the central plane of the semicircle cambered surface of first circular port is positioned at the same plane vertical with upper surface with the central plane of the semicircle cambered surface in lower semi-circular hole, and the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 10mm.Be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1620nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1620nm.The method for making of walking beam 1 and used material are identical with embodiment 1.
In above embodiment 1～3, be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1520nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1520nm.The geometric configuration in first circular port and lower semi-circular hole, the bottom of first circular cambered surface are identical with corresponding embodiment with the distance at the top of lower semi-circular cambered surface.The method for making of walking beam 1 and used material are identical with embodiment 1.
In above embodiment 1～3, be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1530nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1530nm.The geometric configuration in first circular port and lower semi-circular hole, the bottom of first circular cambered surface are identical with corresponding embodiment with the distance at the top of lower semi-circular cambered surface.The method for making of walking beam 1 and used material are identical with embodiment 1.
In above embodiment 1～3, be injected with Fiber Bragg Grating FBG 2 at walking beam 1 upper surface, the grating part of upper Fiber Bragg Grating FBG 2 just in time is positioned on the diametral plane of first circular port, optical fiber is positioned on the left and right sides of walking beam 1 upper surface semi-circular hole, and the wavelength of upper Fiber Bragg Grating FBG 2 is 1545nm.Walking beam 1 lower surface is injected with lower Fiber Bragg Grating FBG 3, the grating part of lower Fiber Bragg Grating FBG 3 just in time is positioned on the diametral plane in lower semi-circular hole, optical fiber is positioned on the left and right sides of lower walking beam 1 lower surface semi-circular hole, and the wavelength of lower Fiber Bragg Grating FBG 3 is 1545nm.The geometric configuration in first circular port and lower semi-circular hole, the bottom of first circular cambered surface are identical with corresponding embodiment with the distance at the top of lower semi-circular cambered surface.The method for making of walking beam 1 and used material are identical with embodiment 1.
In order to verify beneficial effect of the present invention, the inventor adopts two half hole beam differential optical fiber Bragg grating acceleration transducers of the embodiment of the invention 1 preparation to test, and various test situation are as follows:
Experimental apparatus: shaking table, model are JZ-40, are produced by POP, Beijing company; (FBG) demodulator, model are SM-130, are produced by U.S. low-light company.
1, spectrum analysis experiment
The present invention is sticked on the shaking table, and standard charge acceleration transducer (model is 24108) adopts screw rod to be fixed on the shaking table, and the acceleration of control inputs sine wave is 1m/s
2Constant, adopting progressively increases frequency method, and frequency rises to 100Hz by 5Hz.Record the sine output of sensor corresponding under each incoming frequency and find out the wavelength peak-to-peak value with the dynamic demodulation instrument, experimental result sees Table 1, carries out match with Excel software, and the fitted figure of data is seen Fig. 4 in the table 1.
Table 1 grating wavelength peak-to-peak value of the present invention increases situation of change with frequency
| Frequency (Hz) | Peak wavelength (nm) |
| 5 | 1555.075 |
| 10 | 1555.075 |
| 15 | 1555.075 |
| 20 | 1555.072 |
| 25 | 1555.073 |
| 30 | 1555.083 |
| 35 | 1555.087 |
| 40 | 1555.095 |
| 45 | 1555.121 |
| 50 | 1555.148 |
| 55 | 1555.224 |
| 60 | 1555.414 |
| 65 | 1555.22 |
| 70 | 1555.158 |
| 75 | 1555.113 |
| 80 | 1555.103 |
| 85 | 1555.091 |
| 90 | 1555.083 |
| 95 | 1555.079 |
| 100 | 1555.075 |
As seen from Figure 4,5Hz～30Hz is the amplitude flat site, and 35Hz～85Hz is resonance region, and 85Hz is later on the decay area, therefore frequency response range of the present invention is 5Hz～30Hz.
2, sensitivity analysis experiment
The present invention is sticked on the shaking table, and standard charge acceleration transducer (model is 24108) is fixed on the shaking table with screw rod, and the sinusoidal wave frequency of control inputs is that 30Hz is constant, and adopting progressively increases acceleration method, and acceleration is by 0.5m/s
2Rise to 5.5m/s
2Record the sine output of each input acceleration institute respective sensor and find out the drift value of two wavelength peak-to-peak values with the dynamic demodulation instrument, two wavelength shifts subtract each other, experimental result sees Table 2, carry out match with Excel software, the Linear Fit Chart of data is seen Fig. 5 in the table 2, the slope of the fitting a straight line of Fig. 5 is 129.6, i.e. sensitivity is 129.6pm/ (m/s
2).
The drift value of table 2 grating wavelength peak-to-peak value of the present invention increases situation of change with acceleration
As seen from Figure 3, sensitivity of the present invention is 129.6pm/ (m/s
2).
When the sine wave speed of inputting is 1m/s
2, when frequency is 20Hz, output response diagram of the present invention is seen Fig. 6, as seen from Figure 6, output of the present invention response is for sinusoidal wave, output frequency is 20Hz, and is consistent with incoming frequency.
When the sine wave speed of inputting is 2m/s
2, when frequency is 30Hz, output response diagram of the present invention is seen Fig. 7, as seen from Figure 7, output of the present invention response is for sinusoidal wave, by Fourier transform, drawing output frequency is 30Hz, consistent with incoming frequency.
Claims (5)
1. two half hole beam differential optical fiber Bragg grating acceleration transducer, be manufactured with first circular port in walking beam (1) upper surface left side, the arc surface of first circular port is positioned at the reclinate arc surface of walking beam (1) upper surface, walking beam (1) upper surface is provided with grating and partly is positioned at upper Fiber Bragg Grating FBG (2) on first circular bore dia plane, it is characterized in that: be manufactured with the lower semi-circular hole in walking beam (1) lower surface left side, the arc surface in lower semi-circular hole is positioned at the arc surface that walking beam (1) lower surface is bent upwards, the central plane of the semicircle cambered surface of first circular port is positioned at the same plane vertical with upper surface with the central plane of the semicircle cambered surface in lower semi-circular hole, the distance at the top of the bottom of first circular cambered surface and lower semi-circular cambered surface is 2～10mm, walking beam (1) lower surface is provided with grating and partly is positioned at lower Fiber Bragg Grating FBG (3) on the lower semi-circular bore dia plane, upper Fiber Bragg Grating FBG (2) and lower Fiber Bragg Grating FBG (3) head and the tail serial or parallel connection.
2. two half hole beam differential optical fiber Bragg grating acceleration transducer according to claim 1, it is characterized in that: the aperture in described first circular port and lower semi-circular hole is 13～30mm.
3. two half hole beam differential optical fiber Bragg grating acceleration transducer according to claim 1 and 2, it is characterized in that: the aperture of described first circular port is identical with the aperture in lower semi-circular hole.
4. two half hole beam differential optical fiber Bragg grating acceleration transducer according to claim 1, it is characterized in that: the distance at the top of the bottom of described first circular cambered surface and lower semi-circular cambered surface is 2～10mm.
5. two half hole beam differential optical fiber Bragg grating acceleration transducer according to claim 1, it is characterized in that: the wavelength of described upper Fiber Bragg Grating FBG (2) is 1520nm～1545nm or 1555nm～1620nm, and the wavelength of lower Fiber Bragg Grating FBG (3) is 1520nm～1545nm or 1560nm～1620nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100143227A CN103076465A (en) | 2013-01-15 | 2013-01-15 | Double-half-hole-beam differential type fiber bragg grating acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100143227A CN103076465A (en) | 2013-01-15 | 2013-01-15 | Double-half-hole-beam differential type fiber bragg grating acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103076465A true CN103076465A (en) | 2013-05-01 |
Family
ID=48153062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100143227A Pending CN103076465A (en) | 2013-01-15 | 2013-01-15 | Double-half-hole-beam differential type fiber bragg grating acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103076465A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004882A (en) * | 2015-08-19 | 2015-10-28 | 哈尔滨工业大学 | 45-degree optical fiber based differential optical fiber Fabry-Perot acceleration sensor and processing method |
| CN111879969A (en) * | 2020-08-31 | 2020-11-03 | 防灾科技学院 | Medium-high frequency elliptical hinge double-fiber grating acceleration sensor and measurement method |
| CN111879967A (en) * | 2020-08-31 | 2020-11-03 | 防灾科技学院 | Low-frequency FBG acceleration sensor and method based on flexible hinge |
| CN113670429A (en) * | 2021-08-13 | 2021-11-19 | 重庆大学 | Fiber grating transformer winding vibration acceleration sensor and processing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010057247A1 (en) * | 2008-11-19 | 2010-05-27 | The Australian National University | A system, device and method for detecting seismic acceleration |
| GB2467068A (en) * | 2005-03-31 | 2010-07-21 | Pgs Americas Inc | A gravity orientation sensor |
| CN102230820A (en) * | 2011-04-08 | 2011-11-02 | 西北大学 | Fiber Bragg grating accelerometer based on U-type cantilever structure |
-
2013
- 2013-01-15 CN CN2013100143227A patent/CN103076465A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2467068A (en) * | 2005-03-31 | 2010-07-21 | Pgs Americas Inc | A gravity orientation sensor |
| WO2010057247A1 (en) * | 2008-11-19 | 2010-05-27 | The Australian National University | A system, device and method for detecting seismic acceleration |
| CN102230820A (en) * | 2011-04-08 | 2011-11-02 | 西北大学 | Fiber Bragg grating accelerometer based on U-type cantilever structure |
Non-Patent Citations (2)
| Title |
|---|
| 刘钦朋，等: "两点封装的光纤布拉格加速度传感器设计", 《光学 精密工程》 * |
| 李清娜: "光纤Bragg光栅振动传感技术研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004882A (en) * | 2015-08-19 | 2015-10-28 | 哈尔滨工业大学 | 45-degree optical fiber based differential optical fiber Fabry-Perot acceleration sensor and processing method |
| CN105004882B (en) * | 2015-08-19 | 2018-03-02 | 哈尔滨工业大学 | Differential optical fiber F-P acceleration sensor and processing method based on 45 ° of optical fiber |
| CN111879969A (en) * | 2020-08-31 | 2020-11-03 | 防灾科技学院 | Medium-high frequency elliptical hinge double-fiber grating acceleration sensor and measurement method |
| CN111879967A (en) * | 2020-08-31 | 2020-11-03 | 防灾科技学院 | Low-frequency FBG acceleration sensor and method based on flexible hinge |
| CN111879969B (en) * | 2020-08-31 | 2023-04-14 | 中国地震局地球物理研究所 | Medium-high frequency elliptical hinge double-fiber grating acceleration sensor and measurement method |
| CN113670429A (en) * | 2021-08-13 | 2021-11-19 | 重庆大学 | Fiber grating transformer winding vibration acceleration sensor and processing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Basumallick et al. | Fiber Bragg grating accelerometer with enhanced sensitivity | |
| CN201155991Y (en) | Optical fibre grating acceleration sensor | |
| Weng et al. | A robust and compact fiber Bragg grating vibration sensor for seismic measurement | |
| CN105116168B (en) | Optical fibre grating three-dimensional acceleration sensor based on flexible hinge | |
| CN103471702A (en) | Fiber grating vibrating sensor with temperature insensitivity, tunable damping and high precision | |
| CN106680535B (en) | The differential-type optical accelerometer of laser beat frequency is realized based on Fiber Bragg Grating Reflective Spectrum Characteristics | |
| Zeng et al. | A 3-component fiber-optic accelerometer for well logging | |
| CN104390694B (en) | Cladded-fiber grating vibration senses instrument | |
| CN101982740A (en) | Optical fiber grating vibration sensor comprising double cantilever beams with equal strength | |
| CN104483008A (en) | Fiber grating three-dimensional vibration sensor | |
| CN206321660U (en) | Double grating optical fiber acceleration transducer based on spring | |
| CN104296856B (en) | Enhanced sensitivity platform optical fiber raster vibration sensor | |
| CN102087300B (en) | Fiber grating acceleration transducer based on metal bellows structure | |
| CN103076465A (en) | Double-half-hole-beam differential type fiber bragg grating acceleration sensor | |
| CN101769938B (en) | Direct pulling type acceleration transducer based on fiber Bragg grating | |
| CN111879969A (en) | Medium-high frequency elliptical hinge double-fiber grating acceleration sensor and measurement method | |
| CN101907722A (en) | Fiber bragg grating vibration acceleration sensor for monitoring low-frequency earthquake waves | |
| CN103076082A (en) | Single mode-multimode-single mode fiber intermode interference-based vibration and stress sensing device | |
| CN106092304B (en) | For monitoring the distributed optical fiber vibration sensor system of blasting vibration | |
| Qiu et al. | Design and test of a low frequency Fiber Bragg Grating acceleration sensor with double tilted cantilevers | |
| CN107504988B (en) | Fiber bragg grating sensing experiment system based on composite beam structure | |
| CN102230820B (en) | Fiber Bragg grating accelerometer based on U-type cantilever structure | |
| CN101782658A (en) | Probe structure of double L-shaped fiber Bragg grating seismic detector | |
| Stolarik et al. | New methods to seismic monitoring: Laboratory comparative study of michelson fiber-optic interferometer and pneumatic measurement systems | |
| Qiu et al. | A miniaturized low-frequency FBG accelerometer based on symmetrical cantilever beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130501 |