CN209623624U - A kind of fiber grating displacement sensor of high sensitivity - Google Patents
A kind of fiber grating displacement sensor of high sensitivity Download PDFInfo
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- CN209623624U CN209623624U CN201920479967.0U CN201920479967U CN209623624U CN 209623624 U CN209623624 U CN 209623624U CN 201920479967 U CN201920479967 U CN 201920479967U CN 209623624 U CN209623624 U CN 209623624U
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- displacement
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Abstract
The utility model proposes a kind of fiber grating displacement sensor of high sensitivity, the sensor is equipped with displacement measurement bar；One end of institute's displacement measurement bar is the end of probe of sensor, and the other end is connected through the tension spring in sensor with the optical fiber attaching structure in sensor；The optical fiber attaching structure is to be pasted with fiber grating at an elastic strip body and its optical fiber attachment surface；The fiber grating includes tail optical fiber；Described tail optical fiber one end connects with temperature compensation fiber-optic grating sensor, and the other end is communicated with external light source；When external testee drives displacement measurement bar is mobile to make fiber grating synchronous deformation when making optical fiber attaching structure Bending Deformation, the temperature compensation fiber-optic grating sensor exports testee displacement measurement signal according to the center wavelength variation value after fiber grating deformation；The utility model is reliable and stable, measurement accuracy is high, not by electromagnetic interference, anti-lightning, can apply in harsh environments.
Description
Technical field
The utility model relates to sensor technical field, especially a kind of fiber grating displacement sensor of high sensitivity.
Background technique
In civil engineering, the health monitoring of structure is to provide guarantee to the long-term safety operation of structure, is had important
Meaning；And displacement monitoring is one of project most basic in monitoring content, be the basis of a variety of physical quantity variations monitoring (such as: answering
Stress-strain, sedimentation, inclination, acceleration etc.).Displacement monitoring uses displacement sensor, it can provide number for the health status of structure
According to support.Traditional displacement sensor is resistance-type, and this sensor long-time stability are poor, and live line work is done vulnerable to electromagnetism
It disturbs, be affected by the external environment, be not suitable for using outdoors, be not suitable for making in particular surroundings (power plant or not allowing live line work)
With having certain limitation, long term monitoring monitoring result can be distorted, and be not able to satisfy civil engineering structure Long Period Health Monitoring and wanted
It asks.
Summary of the invention
It is reliable and stable, measurement accuracy is high, no the utility model proposes a kind of fiber grating displacement sensor of high sensitivity
By electromagnetic interference, anti-lightning, can apply in harsh environments.
The utility model uses following technical scheme.
A kind of fiber grating displacement sensor of high sensitivity, the sensor are equipped with displacement measurement bar (1)；The displacement
One end of measuring rod is the end of probe of sensor, and the other end adheres to through the optical fiber in the tension spring (6) and sensor in sensor to be tied
Structure (10) is connected；The optical fiber attaching structure is to be pasted with fiber grating (5) at an elastic strip body and its optical fiber attachment surface；It is described
Fiber grating includes tail optical fiber；Described tail optical fiber one end connects with temperature compensation fiber-optic grating sensor (13), the other end and external light source phase
It is logical；When external testee drives displacement measurement bar is mobile to make fiber grating synchronous shape when making optical fiber attaching structure Bending Deformation
Become, the temperature compensation fiber-optic grating sensor is surveyed according to the center wavelength variation value output testee displacement after fiber grating deformation
Measure signal.
The main body of institute's displacement measurement bar is longitudinally placed through at cylinder protection shell (4)；Position as sensor end of probe
One end of shift measurement bar is stretched out from cylinder protection cover top portion, and cylinder protects shell with linear bearing (3) bracing displacement measuring rod.
Described tail optical fiber one end is connected with temperature compensation fiber-optic grating sensor welding, the tail optical fiber other end through tail optical fiber protective cap (11),
3.0 armored optical cable of Φ (12) stretches out sensor housing (9) outside.
The optical fiber attaching structure is the cantilever beam of elasticity；The fiber grating is pasted on the central axes of cantilever beam upper surface
On；The cantilever beam is fixed at sensor housing (9) with fixed block (8).
Institute's displacement measurement bar and tension spring are connected as the assembly of a linear；The assembly and optical fiber attaching structure
Edge intersects vertically and connects.
The temperature compensation fiber-optic grating sensor is miniature temperature compensation fiber-optic grating sensor.
The end of probe of the sensor is placed through at position limiting structure (2)；The position limiting structure is to the end of probe of sensor
Maximum displacement is defined.
The utility model can reliablely and stablely work in longer time period, measurement accuracy is high, not by electromagnetic interference,
Anti-lightning, therefore can apply in harsh environments.
Detailed description of the invention
With reference to the accompanying drawings and detailed description to the further details of explanation of the utility model:
Attached drawing 1 is the schematic internal view of the utility model；
Attached drawing 2 is the schematic diagram of the utility model；
In figure: 1- displacement measurement bar；2 position limiting structures；3- linear bearing；4- cylinder protects shell；5- fiber grating；6- is drawn
Spring；8- fixed block；9- sensor housing；10- optical fiber attaching structure；11- tail optical fiber protective cap；3.0 armored optical cable of 12- Φ；13- temperature
Light filling fiber grating sensor.
Specific embodiment
As shown in Figs. 1-2, a kind of fiber grating displacement sensor of high sensitivity, the sensor are equipped with displacement measurement bar
1；One end of institute's displacement measurement bar is the end of probe of sensor, and the other end is through the light in the tension spring 6 and sensor in sensor
Fine attaching structure 10 is connected；The optical fiber attaching structure is to be pasted with fiber grating 5 at an elastic strip body and its optical fiber attachment surface；
The fiber grating includes tail optical fiber；Described tail optical fiber one end connects with temperature compensation fiber-optic grating sensor 13, the other end and external light source
It communicates；When external testee drives displacement measurement bar is mobile to make fiber grating synchronous shape when making optical fiber attaching structure Bending Deformation
Become, the temperature compensation fiber-optic grating sensor is surveyed according to the center wavelength variation value output testee displacement after fiber grating deformation
Measure signal.
The main body of institute's displacement measurement bar is longitudinally placed through at cylinder protection shell 4；Displacement as sensor end of probe
One end of measuring rod is stretched out from cylinder protection cover top portion, and cylinder protects shell with 3 bracing displacement measuring rod of linear bearing.
Described tail optical fiber one end is connected with temperature compensation fiber-optic grating sensor welding, and the tail optical fiber other end is through tail optical fiber protective cap 11, Φ
3.0 armored optical cables 12 stretch out outside sensor housing 9.
The optical fiber attaching structure is the cantilever beam of elasticity；The fiber grating is pasted on the central axes of cantilever beam upper surface
On；The cantilever beam is fixed at sensor housing 9 with fixed block 8.
Institute's displacement measurement bar and tension spring are connected as the assembly of a linear；The assembly and optical fiber attaching structure
Edge intersects vertically and connects.
The temperature compensation fiber-optic grating sensor is miniature temperature compensation fiber-optic grating sensor.
The end of probe of the sensor is placed through at position limiting structure 2；The position limiting structure to the end of probe of sensor most
Big displacement is defined.
Embodiment:
In product manufacturing, by demarcating the variable quantity for the central wavelength for obtaining fiber grating 5 and making the detection of sensor
Relationship between end movement amount.
This product is installed at the building that need to be measured, makes the end of probe of sensor and the building structure phase that need to measure
Even, when building generates sedimentation, building structure drives the movement of displacement measurement bar to make to make light when optical fiber attaching structure Bending Deformation
The synchronous deformation of fine grating, causes its central wavelength to generate variation, can be obtained by the variable quantity of the central wavelength of fiber grating 5
Deformation quantity of the measured building structure in sedimentation.
Claims (7)
1. a kind of fiber grating displacement sensor of high sensitivity, it is characterised in that: the sensor is equipped with displacement measurement bar
(1)；One end of institute's displacement measurement bar is the end of probe of sensor, and the other end is through in the tension spring (6) and sensor in sensor
Optical fiber attaching structure (10) be connected；The optical fiber attaching structure is to be pasted with optical fiber at an elastic strip body and its optical fiber attachment surface
Grating (5)；The fiber grating includes tail optical fiber；Described tail optical fiber one end connects with temperature compensation fiber-optic grating sensor, the other end and outer
Portion's light source communicates；When external testee drives displacement measurement bar is mobile to make fiber grating when making optical fiber attaching structure Bending Deformation
Synchronous deformation, the temperature compensation fiber-optic grating sensor export testee according to the center wavelength variation value after fiber grating deformation
Displacement measurement signal.
2. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the displacement
The main body of measuring rod is longitudinally placed through at cylinder protection shell (4)；One end of displacement measurement bar as sensor end of probe from
Cylinder protects cover top portion to stretch out, and cylinder protects shell with linear bearing (3) bracing displacement measuring rod.
3. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the tail optical fiber
One end is connected with temperature compensation fiber-optic grating sensor welding, and the tail optical fiber other end is through tail optical fiber protective cap (11), 3.0 armored optical cable of Φ (12)
Stretch out sensor housing (9) outside.
4. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the optical fiber
Attaching structure is the cantilever beam of elasticity；The fiber grating is pasted on the central axes of cantilever beam upper surface；The cantilever beam with
Fixed block (8) is fixed at sensor housing (9).
5. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the displacement
Measuring rod and tension spring are connected as the assembly of a linear；The edge of the assembly and optical fiber attaching structure intersects vertically simultaneously
Connection.
6. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the temperature compensation
Fiber-optic grating sensor is miniature temperature compensation fiber-optic grating sensor.
7. a kind of fiber grating displacement sensor of high sensitivity according to claim 1, it is characterised in that: the sensing
The end of probe of device is placed through at position limiting structure (2)；The position limiting structure is defined the maximum displacement of the end of probe of sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920479967.0U CN209623624U (en) | 2019-04-10 | 2019-04-10 | A kind of fiber grating displacement sensor of high sensitivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920479967.0U CN209623624U (en) | 2019-04-10 | 2019-04-10 | A kind of fiber grating displacement sensor of high sensitivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209623624U true CN209623624U (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920479967.0U Expired - Fee Related CN209623624U (en) | 2019-04-10 | 2019-04-10 | A kind of fiber grating displacement sensor of high sensitivity |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683177A (en) * | 2020-12-02 | 2021-04-20 | 浙江煤炭测绘院有限公司 | Tunnel construction lining and ballast bed relative displacement monitoring devices |
| CN113108979A (en) * | 2021-04-02 | 2021-07-13 | 安徽响水涧抽水蓄能有限公司 | Fiber grating osmometer with temperature compensation |
| CN115574724A (en) * | 2022-11-15 | 2023-01-06 | 西南交通大学 | Railway turnout movable steel rail displacement monitoring device, monitoring method and evaluation method |
-
2019
- 2019-04-10 CN CN201920479967.0U patent/CN209623624U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683177A (en) * | 2020-12-02 | 2021-04-20 | 浙江煤炭测绘院有限公司 | Tunnel construction lining and ballast bed relative displacement monitoring devices |
| CN113108979A (en) * | 2021-04-02 | 2021-07-13 | 安徽响水涧抽水蓄能有限公司 | Fiber grating osmometer with temperature compensation |
| CN115574724A (en) * | 2022-11-15 | 2023-01-06 | 西南交通大学 | Railway turnout movable steel rail displacement monitoring device, monitoring method and evaluation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20210410 |