CN206411139U - A kind of optical fibre grating acceleration sensor of compact conformation - Google Patents
A kind of optical fibre grating acceleration sensor of compact conformation Download PDFInfo
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- CN206411139U CN206411139U CN201621449599.8U CN201621449599U CN206411139U CN 206411139 U CN206411139 U CN 206411139U CN 201621449599 U CN201621449599 U CN 201621449599U CN 206411139 U CN206411139 U CN 206411139U
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- fixed block
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- mass
- compact conformation
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Abstract
The utility model provides a kind of optical fibre grating acceleration sensor of compact conformation, including rectangular housing, and first elastic component one end is connected with housing, and the other end is connected with mass, and the first elastic component and mass can be along housing axial vibrations；The first fixed block, the second fixed block and the second elastic component between the first fixed block and the second fixed block are provided with inside first elastic component；Described fiber grating one end and housing cementation, sequentially pass through the second fixed block, the second elastic component, the first fixed block, mass, the other end and mass cementation.A kind of optical fibre grating acceleration sensor of compact conformation described in the utility model, is integrally formed a fiber grating spring oscillator structure, with compact conformation, the characteristics of small volume, uniformity are good, measurement accuracy is high；In addition, in fixed block of the fiber grating periphery provided with two alignments, further increasing the measurement accuracy of sensor.
Description
Technical field
The utility model belongs to sensory field of optic fibre, is sensed more particularly, to a kind of optical fibre grating acceleration of compact conformation
Device.
Background technology
In recent years, required to measure vibration acceleration signal in increasing commercial Application.Acceleration signal
Measurement be to utilize principle of inertia, measure corresponding acceleration by perceiving the displacement or strain produced by inertia force.Pin
To some current special application fields, it is badly in need of that there is electromagnetism interference, high sensitivity, Larger Dynamic scope, the high property being easily multiplexed
Can acceleration sensing device.And the optical fiber acceleration transducer based on light modulation mechanism presents good application in these areas
Prospect, therefore the relative conventional acceleration sensor based on electromechanical, piezoelectric approach, are received more and more attention.
The sensor mechanism of optic fiber grating wavelength modulation type acceleration transducer is by the use of grating as core devices, by suitable
When chromacoder, acceleration signal is converted into the strain signal of fiber grating, this strain signal can change optical fiber light
The index modulation cycle of grid and the effective refractive index of fibre core, so as to cause the reflection of fiber grating or the wavelength in the centre of homology to become
Change, therefore by the detection to raster center wavelength with regard to extraneous acceleration signal can be obtained.
At present, fiber grating modulation type acceleration transducer mainly has based on two kinds of structure types of body and spring beam in passing,
For the grating acceleration transducer of type structure in passing, because sensing grating is completely to be wrapped in along change in vivo, therefore grating
It is not only very sensitive to axial strain and also very sensitive to transverse strain, and transverse strain will cause the birefringence in optical fiber to show
As, and the reflection peak of sensing grating is divided, so as to influence measurement accuracy.For the grating acceleration of elastic beam structure
Sensor, in order to avoid spring beam, in forced vibration, Strain Distribution is uneven everywhere thereon, the caused grating being embedded on beam
There is chirp phenomenon, it is therefore desirable to which complicated design is processed to ensure spring beam as the beam of uniform strength, in addition, along variant and spring beam
Structural volume is larger, is not easy to small-sized encapsulated.
The content of the invention
In view of this, the utility model is directed to a kind of optical fibre grating acceleration sensor of compact conformation, to provide
The acceleration transducer that a kind of compact conformation, small volume, uniformity are good, measurement accuracy is high.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of optical fibre grating acceleration sensor of compact conformation, including rectangular housing and in housing cavity first
Elastic component, mass, fiber grating, tail optical fiber；
Described first elastic component one end is connected with the housing, and the other end of the first elastic component is connected with mass, and first
Elastic component and mass can be along housing axial vibrations；
Fixed inside first elastic component provided with the first fixed block, the second fixed block and positioned at the first fixed block and second
The second elastic component between block, one end of the first fixed block is connected with mass, the other end and second of first fixed block
Elastic component is connected；One end of second fixed block is connected with housing, and the other end of the second fixed block is connected with the second elastic component；
Described fiber grating one end and housing cementation, sequentially pass through the second fixed block, the second elastic component, the first fixed block,
Mass, the other end is connected with tail optical fiber, and the fiber grating and the mass cementation, tail optical fiber pass through housing.
Further, second fixed block, the first fixed block, mass, the middle part of housing are provided with concentric optical fiber
Through hole；The internal diameter of optical fiber through hole is slightly larger than the outer warp of fiber grating, and the fiber grating and tail optical fiber are respectively positioned in optical fiber through hole.
Further, fiber grating and tail optical fiber are located along the same line, and parallel to the inner walls.
Further, first elastic component and the second elastic component are spring.
Further, the mass is cylindrical mass block, and the axle center of the mass is vertical with fiber grating.
Further, first fixed block and the second fixed block are cylindrical fixed block, first fixed block and
The axle center of second fixed block is located along the same line with the fiber grating.
Further, the mass upper and lower side is respectively equipped with projection, and inner walls are provided with to match with the projection
Groove.
Further, the external diameter of second elastic component is slightly larger than the external diameter of fiber grating.
Relative to prior art, a kind of optical fibre grating acceleration sensor of compact conformation described in the utility model has
Following advantage：
A kind of optical fibre grating acceleration sensor of compact conformation described in the utility model, fiber grating is located at elastomer
And inside mass, so that a fiber grating spring oscillator structure is integrally formed, with compact conformation, small volume, uniformity
Well, the characteristics of measurement accuracy is high；In addition, in fixed blocks of the fiber grating periphery provided with two alignments, it is to avoid fiber grating hair
Raw twisted phenomena, further increases the measurement accuracy of sensor.
Brief description of the drawings
Constitute a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is that a kind of structure of the optical fibre grating acceleration sensor of compact conformation described in the utility model embodiment is shown
It is intended to；
Description of reference numerals：
1- housings；The springs of 2- first；3- masses；The fixed blocks of 4- first；The fixed blocks of 5- second；The elastic components of 6- second；7-
Fiber grating；8- tail optical fibers；9- optical fiber through holes.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicate
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of optical fibre grating acceleration sensor of compact conformation, as shown in figure 1, including rectangular housing 1 and positioned at housing
The first elastic component 2, mass 3, fiber grating 7, tail optical fiber 8 in 1 inner chamber；
The one end of first elastic component 2 is connected with housing 1, and the other end of the first elastic component 2 is connected with mass 3, the first elasticity
Part 2 and mass 3 can be along the axial vibrations of housing 1；
The inside of first elastic component 2 is fixed provided with the first fixed block 4, the second fixed block 5 and positioned at the first fixed block 4 and second
The second elastic component 6 between block 5, one end of the first fixed block 4 is connected with mass 3, the other end and second of the first fixed block 4
Elastic component 6 is connected；One end of second fixed block 5 is connected with housing 1, the other end and the phase of the second elastic component 6 of the second fixed block 5
Even；
The one end of fiber grating 7 and the cementation of housing 1, sequentially pass through second fixed block 5, the second elastic component 6, first
Fixed block 4, mass 3, the other end are connected with tail optical fiber 8, and the fiber grating 7 and the cementation of mass 3, tail optical fiber 8 pass through shell
Body 1.
Second fixed block 5, the first fixed block 4, mass 3, the middle part of housing 1 are provided with concentric optical fiber through hole 9；Optical fiber
The internal diameter of through hole 9 is slightly larger than the external diameter of fiber grating 7, and fiber grating 7 and tail optical fiber 8 are respectively positioned in optical fiber through hole 9.
Fiber grating 7 and tail optical fiber 8 are located along the same line, and parallel to the inwall of housing 1.Improve the survey of sensor
Measure uniformity and precision.
First elastic component 2 and the second elastic component 6 are spring.
Mass 3 is cylindrical brass mass, and the axle center of mass 3 is vertical with fiber grating 7.Cylindrical mass block with
The contact area of housing 1 is small, reduces the friction between mass 3 and housing 1, so as to improve the precision of measurement.
First fixed block 4 and the second fixed block 5 are cylindrical fixed block, the fixed block 5 of the first fixed block 4 and second
Axle center be located along the same line with the fiber grating 7.Cylindrical fixed block is placed conveniently within the inner chamber of the first elastomer 1
In, and reduce the friction between fixed block and the first elastomer 2.
The side of mass 3 is provided with projection, and the inwall of housing 1 is provided with the groove matched with the projection.
The external diameter of second elastic component 6 is slightly larger than the external diameter of fiber grating 7.The outside of fiber grating 7 is provided with the first fixed block 4
And second fixed block 5, and the internal diameter of the elastic component of optical fiber through hole 9 and second is slightly larger than the external diameter of fiber grating 7, can avoid optical fiber
Grating 7 is distorted phenomenon, improves measurement accuracy.
The specific workflow of this example is as follows：
Sensor is placed in testee surface, high speed wavelength demodulation device is connected to by tail optical fiber 8, operation program is opened, when
When having the acceleration a of horizontal direction, due to effect of inertia, mass 3 is caused to be accelerated relative to housing 1, if first
Elastic component 2 is stretched (or compression), and corresponding fiber grating 7 is stretched (or compression), and the wavelength of fiber grating 7 produces change,
Monitor the wavelength change of fiber grating 7 in real time by high speed Wavelength demodulation center, learn the acceleration magnitude of testee.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of optical fibre grating acceleration sensor of compact conformation, it is characterised in that：Including rectangular housing (1) and positioned at described
The first elastic component (2), mass (3), fiber grating (7), tail optical fiber (8) in housing (1) inner chamber；
Described first elastic component (2) one end is connected with the housing (1), the other end and the matter of first elastic component (2)
Gauge block (3) is connected, and first elastic component (2) and mass (3) can be along housing (1) axial vibrations；
Provided with the first fixed block (4), the second fixed block (5) and positioned at first fixed block inside first elastic component (2)
(4) the second elastic component (6) and between second fixed block (5), one end and the mass of first fixed block (4)
(3) connect, the other end of first fixed block (4) is connected with second elastic component (6)；Second fixed block (5)
One end is connected with the housing (1), and the other end of second fixed block (5) is connected with second elastic component (6)；
Described fiber grating (7) one end and the housing (1) cementation, sequentially pass through second fixed block (5), the second elastic component
(6), the first fixed block (4), mass (3), the other end are connected with tail optical fiber (8), the fiber grating (7) and the mass
(3) cementation, the tail optical fiber (8) passes through the housing (1).
2. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：Described
Two fixed blocks (5), the first fixed block (4), mass (3), the middle part of housing (1) are provided with concentric optical fiber through hole (9)；It is described
The internal diameter of optical fiber through hole (9) is slightly larger than the external diameter of the fiber grating (7), and the fiber grating (7) and tail optical fiber (8) are respectively positioned on light
In fine through hole (9).
3. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 2, it is characterised in that：The light
Fine grating (7) and tail optical fiber (8) are located along the same line, and parallel to the housing (1) inwall.
4. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：Described
One elastic component (2) and the second elastic component (6) are spring.
5. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：The matter
Gauge block (3) is cylindrical mass block, and the axle center of the mass (3) is vertical with fiber grating (7).
6. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：Described
One fixed block (4) and the second fixed block (5) are cylindrical fixed block, first fixed block (4) and the second fixed block (5)
Axle center is located along the same line with the fiber grating (7).
7. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：The matter
Gauge block (3) upper and lower side is respectively equipped with projection, and housing (1) inwall is provided with the groove matched with the projection.
8. a kind of optical fibre grating acceleration sensor of compact conformation according to claim 1, it is characterised in that：Described
The external diameter of two elastic components (6) is slightly larger than the external diameter of the fiber grating (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621449599.8U CN206411139U (en) | 2016-12-28 | 2016-12-28 | A kind of optical fibre grating acceleration sensor of compact conformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621449599.8U CN206411139U (en) | 2016-12-28 | 2016-12-28 | A kind of optical fibre grating acceleration sensor of compact conformation |
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| CN206411139U true CN206411139U (en) | 2017-08-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879966A (en) * | 2020-06-24 | 2020-11-03 | 南京邮电大学 | Fiber bragg grating acceleration sensor for multi-direction detection |
| CN113295424A (en) * | 2021-06-23 | 2021-08-24 | 东北农业大学 | Automobile engine knock sensor based on fiber grating array |
-
2016
- 2016-12-28 CN CN201621449599.8U patent/CN206411139U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879966A (en) * | 2020-06-24 | 2020-11-03 | 南京邮电大学 | Fiber bragg grating acceleration sensor for multi-direction detection |
| CN113295424A (en) * | 2021-06-23 | 2021-08-24 | 东北农业大学 | Automobile engine knock sensor based on fiber grating array |
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