CN208458900U - A kind of fiber bragg grating pressure sensor structure - Google Patents
A kind of fiber bragg grating pressure sensor structure Download PDFInfo
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- CN208458900U CN208458900U CN201821178084.8U CN201821178084U CN208458900U CN 208458900 U CN208458900 U CN 208458900U CN 201821178084 U CN201821178084 U CN 201821178084U CN 208458900 U CN208458900 U CN 208458900U
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- fiber grating
- cantilever beam
- diaphragm
- pressure sensor
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Abstract
The utility model belongs to art of pressure sensors, it is related to a kind of fiber bragg grating pressure sensor structure, it is characterised in that: including shell (1), end cap (2), diaphragm (3), transmission rod (4), cantilever beam (5), fiber grating one (6) and fiber grating two (7)；The top of the shell (1) is equipped with diaphragm (3), and shell (1) is downwardly extending transmission rod (4) at diaphragm (3) center underface；The end cap (2) is engraved structure, its top is the cantilever beam (5) for being equipped with fiber grating one (6) and fiber grating two (7), shell (1) is installed togather with end cap (2), transmission rod (4) and cantilever beam (5) contact free.The deformation that cantilever beam (5) generates makes optic fiber grating wavelength generate drift, can calculate ambient pressure size by measuring optic fiber grating wavelength drift value.The structure not only substantially increases the sensitivity of demodulated signal, but also can carry out temperature-compensating, improves the environmental suitability of sensor.
Description
Technical field
The utility model belongs to art of pressure sensors, is related to a kind of fiber bragg grating pressure sensor structure.
Background technique
The pressure sensor of full light is able to achieve based on pressure-measuring fiber grating technology.The knot of the cantilever beam of such sensor
Structure directly affects the reliability and frequency characteristic of sensor, and grating layout structure is related to the measurement sensitivity and temperature of sensor
Compensation effect.
Fiber bragg grating pressure sensor mostly uses single cantilever beam structure or directly pastes grating on diaphragm at present, uses
Single cantilever beam structure makes sensor frequency characteristic poor, and its volume is larger, and grating sensor temperature is pasted directly on diaphragm
It is undesirable to spend compensation effect, causes error larger.
Summary of the invention
The purpose of this utility model is: proposing a kind of fiber bragg grating pressure sensor of simple beam structure, the structure is not only
The frequency characteristic for substantially increasing sensor reduces the volume weight of sensor, and structure is simple, and improve system can
By property.
The technical scheme adopted by the invention is as follows: a kind of fiber bragg grating pressure sensor structure, including shell 1, end cap 2, film
Piece 3, transmission rod 4, cantilever beam 5, fiber grating 1 and fiber grating 27；The top of the shell 1 is equipped with diaphragm 3, and shell 1 exists
Transmission rod 4 is downwardly extending at immediately below 3 center of diaphragm；The end cap 2 is engraved structure, and top is to be equipped with optical fiber light
The cantilever beam 5 of grid 1 and fiber grating 27, shell 1 are installed togather with end cap 2, and transmission rod 4 freely connects with cantilever beam 5
Touching.
Wherein, one 6 fiber grating 27 of fiber grating is symmetrically fixed on 5 upper and lower surface of cantilever beam by several glue points 8.
The tail optical fiber of fiber grating 1 and fiber grating 27 is drawn by being located at the cable-through hole 9 of 2 bottom of end cap.Cantilever beam 5 is simply supported beam
Structure.
In pressure sensor, diaphragm 3 is generated deformation by external pressure, and diaphragm deformation is passed to cantilever beam 5 by transmission rod 4
It is allowed to be deformed, the deformation that cantilever beam 5 generates makes fiber grating 1 and 27 wavelength of fiber grating generate drift, passes through measurement
Optic fiber grating wavelength drift value can calculate ambient pressure size.The structure not only substantially increases the sensitivity of demodulated signal,
And temperature-compensating can be carried out, improve the environmental suitability of sensor.
The invention has the benefit that the structure substantially increases the frequency characteristic of sensor, the symmetrical cantilever for pasting grating
Girder construction can carry out temperature-compensating, and double transducer sensitivity, improve the reliability of system.
Detailed description of the invention
Fig. 1 is present apparatus demodulating system structure chart, wherein 1: shell, 2: end cap, and 3: diaphragm, 4: transmission rod, 5: cantilever beam,
6: fiber grating one, 7: fiber grating two, 8: glue point, 9: cable-through hole.
Specific embodiment
The utility model is described in further details below with reference to Fig. 1.Please refer to Figure of description 1.
The device includes shell 1, end cap 2, diaphragm 3, transmission rod 4, cantilever beam 5, one 6 fiber grating 27 of fiber grating, glue
Point 8 and cable-through hole 9.The shell 1 is threadedly coupled with end cap 2, and diaphragm 3 and transmission rod 4 are a part of shell 1, transmission rod 4 with
5 contact free of cantilever beam, one 6 fiber grating 27 of fiber grating are fixed on 5 upper and lower surface of cantilever beam, fiber grating by glue point 8
1 and the tail optical fiber of fiber grating 27 drawn by cable-through hole 9.
Fiber grating 1 and fiber grating 27 are fixed on cantilever beam 5 by glue point 8, and fiber grating 1 and optical fiber
Grating 27 is symmetrically pasted in 5 upper and lower surface of cantilever beam, and tail optical fiber passes through cable-through hole 9 respectively and draws.
In in the sensor, diaphragm 3 is generated deformation by external pressure, and diaphragm deformation is passed to cantilever beam 5 and is allowed to by transmission rod 4
It is deformed, the deformation that cantilever beam 5 generates makes fiber grating 1 and 27 wavelength of fiber grating generate drift, by measuring optical fiber
Grating wavelength drift value can calculate ambient pressure size.The structure not only substantially increases the sensitivity of demodulated signal, but also
Temperature-compensating can be carried out, the environmental suitability of sensor is improved.
The structure substantially increases the frequency characteristic of sensor, and the symmetrical cantilever beam structure for pasting grating can carry out temperature
Compensation, and transducer sensitivity is doubled, improve the reliability of system.
Claims (5)
1. a kind of fiber bragg grating pressure sensor structure, it is characterised in that: including shell (1), end cap (2), diaphragm (3), power transmission
Bar (4), cantilever beam (5), fiber grating one (6) and fiber grating two (7)；Diaphragm (3) are equipped at the top of the shell (1), shell
(1) transmission rod (4) are downwardly extending at diaphragm (3) center underface；The end cap (2) is engraved structure, and top is
The cantilever beam (5) of fiber grating one (6) and fiber grating two (7) is installed, shell (1) is installed togather with end cap (2),
Transmission rod (4) and cantilever beam (5) contact free.
2. pressure sensor structure as described in claim 1, it is characterised in that: fiber grating one (6) fiber grating two (7) is logical
It crosses glue point (8) and is symmetrically fixed on cantilever beam (5) upper and lower surface.
3. pressure sensor structure as claimed in claim 1 or 2, it is characterised in that: fiber grating one (6) and fiber grating two
(7) tail optical fiber is drawn by being located at the cable-through hole (9) of end cap (2) bottom.
4. pressure sensor structure as described in claim 1, it is characterised in that: cantilever beam (5) is simple beam structure.
5. pressure sensor structure as described in claim 1, it is characterised in that: in the pressure sensor structure, diaphragm
(3) deformation is generated by external pressure, diaphragm deformation is passed to cantilever beam (5) and is allowed to be deformed by transmission rod (4), cantilever beam
(5) deformation generated makes fiber grating one (6) and fiber grating two (7) wavelength generate drift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821178084.8U CN208458900U (en) | 2018-07-24 | 2018-07-24 | A kind of fiber bragg grating pressure sensor structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821178084.8U CN208458900U (en) | 2018-07-24 | 2018-07-24 | A kind of fiber bragg grating pressure sensor structure |
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| CN208458900U true CN208458900U (en) | 2019-02-01 |
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| CN201821178084.8U Active CN208458900U (en) | 2018-07-24 | 2018-07-24 | A kind of fiber bragg grating pressure sensor structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044541A (en) * | 2019-05-27 | 2019-07-23 | 西安石油大学 | A kind of fiber bragg grating pressure sensor based on rectangular diaphragm |
| CN110579306A (en) * | 2019-09-17 | 2019-12-17 | 长江水利委员会长江科学院 | Vibrating wire type pressure sensor |
| CN111855043A (en) * | 2020-07-31 | 2020-10-30 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN111998989A (en) * | 2020-07-28 | 2020-11-27 | 西北大学 | Diaphragm type fiber grating pressure sensor based on lateral load sensitization |
| CN112729400A (en) * | 2020-12-25 | 2021-04-30 | 武汉理工大学 | Dual-purpose sensor for flow velocity and liquid pressure |
| CN113280957A (en) * | 2021-04-16 | 2021-08-20 | 中山市精量光电子科技有限公司 | FBG pressure sensor based on diaphragm and flexible hinge lever mechanism |
| CN113375840A (en) * | 2020-02-25 | 2021-09-10 | 北京机械设备研究所 | Pressure sensor and packaging method thereof |
| CN114963028A (en) * | 2022-06-08 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Fiber grating infrasound sensor for pressure-variable light transducing piece and pipeline leakage detection |
| TWI803006B (en) * | 2021-09-29 | 2023-05-21 | 劉文豐 | Pressure sensor |
-
2018
- 2018-07-24 CN CN201821178084.8U patent/CN208458900U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044541A (en) * | 2019-05-27 | 2019-07-23 | 西安石油大学 | A kind of fiber bragg grating pressure sensor based on rectangular diaphragm |
| CN110579306A (en) * | 2019-09-17 | 2019-12-17 | 长江水利委员会长江科学院 | Vibrating wire type pressure sensor |
| CN113375840A (en) * | 2020-02-25 | 2021-09-10 | 北京机械设备研究所 | Pressure sensor and packaging method thereof |
| CN113375840B (en) * | 2020-02-25 | 2022-12-23 | 北京机械设备研究所 | Pressure sensor and packaging method thereof |
| CN111998989A (en) * | 2020-07-28 | 2020-11-27 | 西北大学 | Diaphragm type fiber grating pressure sensor based on lateral load sensitization |
| CN111998989B (en) * | 2020-07-28 | 2021-09-14 | 西北大学 | Diaphragm type fiber grating pressure sensor based on lateral load sensitization |
| CN111855043B (en) * | 2020-07-31 | 2022-03-22 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN111855043A (en) * | 2020-07-31 | 2020-10-30 | 长飞光纤光缆股份有限公司 | Fiber grating soil pressure sensor |
| CN112729400A (en) * | 2020-12-25 | 2021-04-30 | 武汉理工大学 | Dual-purpose sensor for flow velocity and liquid pressure |
| CN112729400B (en) * | 2020-12-25 | 2022-07-12 | 武汉理工大学 | Dual-purpose sensor for flow velocity and liquid pressure |
| CN113280957A (en) * | 2021-04-16 | 2021-08-20 | 中山市精量光电子科技有限公司 | FBG pressure sensor based on diaphragm and flexible hinge lever mechanism |
| TWI803006B (en) * | 2021-09-29 | 2023-05-21 | 劉文豐 | Pressure sensor |
| CN114963028A (en) * | 2022-06-08 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Fiber grating infrasound sensor for pressure-variable light transducing piece and pipeline leakage detection |
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