A fbg pressure sensor based on diaphragm and flexible hinge lever mechanism
A technology of pressure sensors and flexible hinges, which is applied in the application of optical methods for fluid pressure measurement, fluid pressure measurement, and measurement of the change in optical properties of materials when they are stressed, can solve the problem of limited pressure bearing capacity of thin films, Grating chirp, no temperature compensation and other problems, to achieve the effect of improving measurement accuracy and sensitivity, realizing pressure sensitivity enhancement, and realizing temperature self-compensation
A technology of pressure sensors and flexible hinges, which is applied in the application of optical methods for fluid pressure measurement, fluid pressure measurement, and measurement of the change in optical properties of materials when they are stressed, can solve the problem of limited pressure bearing capacity of thin films, Grating chirp, no temperature compensation and other problems, to achieve the effect of improving measurement accuracy and sensitivity, realizing pressure sensitivity enhancement, and realizing temperature self-compensation
CN113280957BActive Publication Date: 2022-05-13中山市精量光电子科技有限公司
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[0023] This part will describe the specific embodiment of the present invention in detail, and the preferred embodiment of the present invention is shown in the accompanying drawings. Each technical feature and overall technical solution of the invention, but it should not be understood as a limitation on the protection scope of the present invention.
[0024] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
[0025] I...
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The invention discloses a FBG pressure sensor based on a diaphragm and a flexible hinge lever mechanism, which comprises: a casing assembly, which has two optical fiber outlets at the top and a pressure measurement channel at the bottom; the diaphragm is arranged in the pressure measurement channel; The force rod is located above the diaphragm and is connected to the middle of the diaphragm; the lever mechanism is located in the inner cavity of the housing assembly, including a support frame and a flexible hinge lever arranged on the support frame, and the flexible hinge lever is located on the force transmission rod. Above; the pressure measuring fiber grating and the temperature measuring fiber grating are arranged on the flexible hinge lever and arranged at intervals, and the pigtails of the pressure measuring fiber grating and the temperature measuring fiber grating are respectively passed through an optical fiber outlet. Through the above structure, pressure sensitization can be achieved, and temperature self-compensation can be performed, thereby improving measurement accuracy and sensitivity.
Description
technical field [0001] The invention relates to the technical field of fiber grating sensing and monitoring, in particular to a fiber grating pressure sensor. Background technique [0002] In recent years, fiber grating sensors have been widely used due to their advantages such as explosion-proof, light weight, small size, corrosion resistance, anti-electromagnetic interference, high reliability, and easy networking. However, since the pressure sensitivity of the bare fiber grating is very low, only about 3pm / Mpa, the too low sensitivity cannot meet the high-sensitivity measurement in practical applications. Therefore, some sensors adopt pressure sensitization technology. Traditional pressure sensitization includes FBG pressure sensitization based on polymer-filled metal tubes and FBG pressure sensitization based on elastic materials (FBG, Fiber Bragg Grating, Fiber Bragg Grating). [0003] In the traditional FBG pressure-sensitizing method based on polymer-filled metal tub...
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Patent Timeline
13 May 2022
Publication
CN113280957B
- IPC
- G01L1/24; G01L11/02; G01L19/04; G01K11/3206
- CPC
- G01L1/246; G01L11/025; G01L19/04; G01K11/3206
- Inventors
- 梁磊; 叶天翊