CN105842479A - Fiber grating acceleration sensor with integrated differential structure - Google Patents
Fiber grating acceleration sensor with integrated differential structure Download PDFInfo
- Publication number
- CN105842479A CN105842479A CN201610391377.3A CN201610391377A CN105842479A CN 105842479 A CN105842479 A CN 105842479A CN 201610391377 A CN201610391377 A CN 201610391377A CN 105842479 A CN105842479 A CN 105842479A
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- fiber
- sensor
- mass
- optical fiber
- acceleration sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
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- General Physics & Mathematics (AREA)
- Pressure Sensors (AREA)
Abstract
The invention relates to a fiber grating acceleration sensor with an integrated differential structure and belongs to the sensor technical field. The sensor includes a supporting structure (101), an elastic beam (102), a mass block (103) and an optical fiber (105) with two fiber gratings (104); and the optical fiber (105) with the two fiber gratings (104) is installed on the supporting structure (101) and the mass block (103) in a tensioned and aligned manner through glue points or solder points (106). The fiber grating acceleration sensor is of structural simplicity; the supporting structure, the elastic beam and the mass block are of an integrated structure, and therefore, the fiber grating acceleration sensor has high reliability and excellent thermal stability, and process difficulty can be reduced, and the consistency of the operation of the sensor can be improved; a differential measurement method is adopted, the tensile stress of the two gratings is in an increased state and a reduced state respectively at the same time, and subtraction is performed on the output of the two fiber gratings, and therefore, thermal influence can be effectively eliminated, and the sensitivity of the sensor can be doubled relative to a sensor adopting a single fiber grating; and the fiber grating acceleration sensor of the invention has high frequency response.
Description
Technical field
The present invention relates to the optical fibre grating acceleration sensor of a kind of integration differential structure, with fiber grating
As Sensitive Apparatus, belong to sensor technical field.
Background technology
Optical fiber sensing technology starts development as an emerging technology, is also that be a dark horse in recent years is new
Subject and frontier.There is the outstanding advantages such as insulation, electromagnetism interference, wavelength-division multiplex due to Fibre Optical Sensor,
Become special environment and sensor that heavy construction structure measurement is paid special attention to.The acceleration in common engineering field
Sensor is piezoelectric acceleration sensor, in using to insulation, electromagnetic interference problem the most sensitive, used by lead
Line also has obvious restriction for telemeasurement, due to the outstanding advantages of Fibre Optical Sensor, makes optical fiber
Formula acceleration transducer becomes the hot technology paid close attention in recent years, and wherein optical fibre grating acceleration sensor is it
Important class.Existing fiber grating acceleration transducer is more takes cantilever beam structure, causes sensor construction
Relatively big, frequency response is relatively low.Owing to fiber grating has thermo-responsive characteristic, the change of ambient temperature will be to biography
Sensor output impacts, and the most conventional more employing is gluedd joint or screw connecting mode composition acceleration sensing
The spring mass system of device, the reliability of serious restriction sensor and the raising in service life, impact is in engineering
In promote the use of.
Summary of the invention
It is an object of the invention to for reliability in optical fiber acceleration transducer application process, heat stability, frequently
Ring and under-sensitive problem, propose the optical fibre grating acceleration sensor of a kind of integration differential structure,
Solve reliability to promote and heat stability improvement problem, widened acceleration Hz-KHz and heightened sensitive
Degree.
It is an object of the invention to be achieved through the following technical solutions:
A kind of integration differential structure optical fibre grating acceleration sensor, including supporting construction (101),
Spring beam (102), mass (103) and and optical fiber (105) with 2 fiber gratings (104),
Will be with the optical fiber (105) of two fiber gratings (104) by glue point or solder joint (106) tensioning collimation peace
It is contained on supporting construction (101) and mass (103).
The sensitivity principle of described optical fibre grating acceleration sensor is to be converted into mass by measuring acceleration
(103) dynamic force, acts on fiber grating (104) so that it is tensioning state changes, and causes optical fiber
The change of grating (104) reflection wavelength, by carrying out sense accelerations to the detection of reflection wavelength.
Beneficial effect
Contrast prior art, the invention have the characteristics that:
1, by differential fashion, the tension of two fiber gratings of synchronization is respectively at and shape is increased or decreased
State, two fiber grating outputs are subtracted each other, and can effectively eliminate heat affecting, and make transducer sensitivity relative to list
Fiber grating doubles；
2, by integrated design processing mode, the spring beam of acceleration transducer, mass and support knot are made
Structure combines together, it is to avoid connects the impact brought, is effectively improved the reliability of sensor, heat stability and makes
With the life-span, and while reducing technology difficulty, improve working sensor concordance；
3, fiber grating is connected by tensioning mode with mass and supporting construction, and guarantees in working range
The most all the time being in tensioning state, by the way of regulation spring beam rigidity with mass size, scalable is accelerated
The frequency response of degree sensor and sensitivity, simple for structure, sensing relation is simple, and mounting process is easy, can obtain
Upper frequency responds.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of form of implementation sensor of the present invention；
Fig. 2 is under 80Hz frequency, the output waveform schematic diagram of this optical fibre grating acceleration sensor；
Fig. 3 is under 120Hz frequency, the output waveform schematic diagram of this optical fibre grating acceleration sensor；
Fig. 4 is under 160Hz frequency, the output waveform schematic diagram of this optical fibre grating acceleration sensor；
Fig. 5 is under 200Hz frequency, the output waveform schematic diagram of this optical fibre grating acceleration sensor；
Fig. 6 is under 300Hz frequency, the output waveform schematic diagram of this optical fibre grating acceleration sensor；
Reference: 101-supporting construction, 102-spring beam, 103-mass, 104-fiber grating, 105-
Optical fiber, 106-glue point or solder joint.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is done described in detail below.
It is illustrated in figure 1 the optical fibre grating acceleration sensor of a kind of integration differential structure, by can in figure
To find out, it includes supporting construction (101), spring beam (102), mass (103) and 2 optical fiber of band
The optical fiber (105) of grating (104)；
Connected mode: and knot will be supported after optical fiber (105) tensioning with two fiber gratings (104)
Structure (101) two ends and mass (103) midpoint connect so that glue point or solder joint (106) are fixing, and make optical fiber
(105) axial centerline of supporting construction (101) it is in；
Acceleration analysis principle: extraneous acceleration makes mass (103) produce inertia force, in mass (103)
Under the common effect of inertia force and spring beam (102) restoring force, make the tensioning of two fiber gratings (104)
State changes, and the output wavelength of two fiber gratings (104) is subtracted each other, and eliminates fiber grating heat affecting,
Obtain the wavelength variable quantity corresponding with acceleration, by demarcating, can reverse accekeration.
As preferably, described supporting construction (101), spring beam (102) and mass (103) are by one
Block elastomeric material hollows out through integrated design and is processed into.
As preferably, described fiber grating (104) is engraved on optical fiber (105) by phase masks.
As preferably, described two fiber gratings (104) are prepared on an optical fiber (105).
As preferably, vertical with spring beam (102) for ensureing fiber grating (104), and it is in its center
Position, is provided with collimation groove in acceleration transducer supporting construction (101) and mass (103).
It is a feature of the present invention that: the Sensitive Apparatus of described optical fibre grating acceleration sensor is fiber grating
, and two fiber gratings (104) are symmetrical in mass (103) and spring beam (102) is installed (104)
In sensor support frame (101) and mass (103), form differential type acceleration sensitive structure.
Result of the test
The optical fibre grating acceleration sensor using a kind of integration differential structure of present invention proposition exists
Under 80Hz, 120Hz, 160Hz, 200Hz, 300Hz frequency, being tested, wavy curve such as Fig. 2 is extremely
Shown in Fig. 6, abscissa is time data point, and vertical coordinate is sensor output wavelength, it can be seen that
Smooth sinusoidal wave form can be exported at each frequency, illustrate that this kind of structured optical fiber grating acceleration transducer can
Effectively work in this frequency range.
The above is presently preferred embodiments of the present invention, and the present invention should not be limited to this embodiment and attached
Figure disclosure of that.Every without departing from the equivalence completed under spirit disclosed in this invention or amendment, all fall
Enter the scope of protection of the invention.
Claims (4)
1. the optical fibre grating acceleration sensor of an integrated differential structure, it is characterised in that: include propping up
Support structure (101), spring beam (102), mass (103) and and 2 fiber gratings (104) of band
Optical fiber (105), will be with the optical fiber (105) of two fiber gratings (104) by glue point or solder joint (106)
Tensioning alignment is in supporting construction (101) and mass (103).
Elastomeric material is processed into the support frame (101) of acceleration transducer, bullet through integrated design
Property beam (102) and mass (103), using with two fiber gratings (104) optical fiber (105) as
Sensitive Apparatus, is arranged on support frame (101) and mass (103) through glue point or solder joint (106) tensioning
On, form differential optical fiber grating acceleration transducer.It is characterized in that: integrated design processing acceleration
The support frame (101) of sensor, spring beam (102) and mass (103), use with two optical fiber
The optical fiber (105) of grating (104) is as Sensitive Apparatus, and is arranged on quality by glue point or solder joint tensioning
On block (103) and support frame (101), form differential type acceleration sensing form.
The optical fibre grating acceleration sensor of a kind of integration differential structure the most according to claim 1,
It is characterized in that, sensor support frame (101), spring beam (102) and mass (103) pass through one
Bodyization design hollows out is processed into.
The optical fibre grating acceleration sensor of a kind of integration differential structure the most according to claim 1,
It is characterized in that, described fiber grating (104) is engraved on optical fiber (105) by phase masks, and
And two fiber gratings (104) preparations are on an optical fiber (105).
4. according to the optical fibre grating acceleration of the arbitrary described a kind of integration differential structure of claim 1-3
Sensor, it is characterised in that vertical with spring beam (102) for ensureing fiber grating (104), and be in
Its center, is provided with collimation recessed in acceleration transducer supporting construction (101) and mass (103)
Groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391377.3A CN105842479A (en) | 2016-06-03 | 2016-06-03 | Fiber grating acceleration sensor with integrated differential structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391377.3A CN105842479A (en) | 2016-06-03 | 2016-06-03 | Fiber grating acceleration sensor with integrated differential structure |
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| Publication Number | Publication Date |
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| CN105842479A true CN105842479A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610391377.3A Pending CN105842479A (en) | 2016-06-03 | 2016-06-03 | Fiber grating acceleration sensor with integrated differential structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841680A (en) * | 2017-03-30 | 2017-06-13 | 吉林大学 | A kind of optical fiber interference type detector device with collimater |
| CN109387275A (en) * | 2017-08-04 | 2019-02-26 | 菲布雷格光电科技（湖北）有限公司 | Optical fibre grating acceleration sensor based on flexible hinge |
| CN110133324A (en) * | 2019-06-05 | 2019-08-16 | 华北水利水电大学 | A kind of differential optical fiber grating acceleration sensing device |
| CN111103050A (en) * | 2019-12-26 | 2020-05-05 | 武汉理工大学 | Polymer-based fiber grating vibration sensor |
| CN111174897A (en) * | 2020-01-16 | 2020-05-19 | 西安石油大学 | Cantilever beam type two-dimensional fiber grating vibration sensor |
| CN114337073A (en) * | 2021-12-30 | 2022-04-12 | 江苏法尔胜光电科技有限公司 | Motor abnormal vibration monitoring device based on weak reflection fiber bragg grating |
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| US20040046111A1 (en) * | 2002-09-10 | 2004-03-11 | The Regents Of The University Of California | Fiber optic micro accelerometer |
| WO2006115511A1 (en) * | 2005-04-21 | 2006-11-02 | Northrop Grumman Corporation | Fiber optic accelerometer |
| CN201155991Y (en) * | 2007-12-20 | 2008-11-26 | 武汉理工大学 | Optical fibre grating acceleration sensor |
| CN102323447A (en) * | 2011-08-08 | 2012-01-18 | 武汉理工大学 | Method for manufacturing small fiber grating acceleration sensor |
| JP2014032054A (en) * | 2012-08-02 | 2014-02-20 | Kagawa Univ | Acceleration sensor |
| CN103675340A (en) * | 2013-12-20 | 2014-03-26 | 北京航天时代光电科技有限公司 | Optical fiber accelerometer in differential double-grating structure |
| EP2733474A2 (en) * | 2012-11-19 | 2014-05-21 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Expansion measurement strip and mechanical component |
| 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 |
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- 2016-06-03 CN CN201610391377.3A patent/CN105842479A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040046111A1 (en) * | 2002-09-10 | 2004-03-11 | The Regents Of The University Of California | Fiber optic micro accelerometer |
| WO2006115511A1 (en) * | 2005-04-21 | 2006-11-02 | Northrop Grumman Corporation | Fiber optic accelerometer |
| CN201155991Y (en) * | 2007-12-20 | 2008-11-26 | 武汉理工大学 | Optical fibre grating acceleration sensor |
| CN102323447A (en) * | 2011-08-08 | 2012-01-18 | 武汉理工大学 | Method for manufacturing small fiber grating acceleration sensor |
| JP2014032054A (en) * | 2012-08-02 | 2014-02-20 | Kagawa Univ | Acceleration sensor |
| EP2733474A2 (en) * | 2012-11-19 | 2014-05-21 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Expansion measurement strip and mechanical component |
| CN103675340A (en) * | 2013-12-20 | 2014-03-26 | 北京航天时代光电科技有限公司 | Optical fiber accelerometer in differential double-grating structure |
| 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 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841680A (en) * | 2017-03-30 | 2017-06-13 | 吉林大学 | A kind of optical fiber interference type detector device with collimater |
| CN106841680B (en) * | 2017-03-30 | 2019-11-12 | 吉林大学 | A kind of optical fiber interference type detector device with collimator |
| CN109387275A (en) * | 2017-08-04 | 2019-02-26 | 菲布雷格光电科技（湖北）有限公司 | Optical fibre grating acceleration sensor based on flexible hinge |
| CN110133324A (en) * | 2019-06-05 | 2019-08-16 | 华北水利水电大学 | A kind of differential optical fiber grating acceleration sensing device |
| CN110133324B (en) * | 2019-06-05 | 2022-05-06 | 华北水利水电大学 | Differential type fiber bragg grating acceleration sensing device |
| CN111103050A (en) * | 2019-12-26 | 2020-05-05 | 武汉理工大学 | Polymer-based fiber grating vibration sensor |
| CN111103050B (en) * | 2019-12-26 | 2021-04-02 | 武汉理工大学 | Polymer-based fiber grating vibration sensor |
| CN111174897A (en) * | 2020-01-16 | 2020-05-19 | 西安石油大学 | Cantilever beam type two-dimensional fiber grating vibration sensor |
| CN114337073A (en) * | 2021-12-30 | 2022-04-12 | 江苏法尔胜光电科技有限公司 | Motor abnormal vibration monitoring device based on weak reflection fiber bragg grating |
| CN114337073B (en) * | 2021-12-30 | 2023-12-15 | 江苏法尔胜光电科技有限公司 | Motor abnormal vibration monitoring device based on weak reflection fiber bragg grating |
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