Three-axis Fiber Bragg Grating Strain Measurement Sensor with Adjustable Sensitivity
A fiber grating and strain sensing technology, which is applied to measuring devices, instruments, and optical devices, etc., can solve the problems of time-consuming and laborious installation, and cannot guarantee the installation accuracy of sensors, so as to improve the measurement accuracy and realize the sensitivity of strain measurement. Effect
Active Publication Date: 2022-04-01
SUZHOU NUCLEAR POWER RES INST +2
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Problems solved by technology
When it is necessary to determine the principal stress direction of the measuring point, it is necessary to arrange at least three fiber grating strain measurement sensors according to a certain angle, which not only takes time and effort to install, but also cannot guarantee the accuracy of the sensor installation
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[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Examples are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0024] Refer to attached Figure 1-3 , a three-axis FBG strain measurement sensor with adjustable sensitivity in this embodiment includes a ring-shaped sensor substrate 10 , a strain sensing FBG and an installation arm 30 .
[0025] In this embodiment, the strain sensing fiber grating includes a 0° direction strain sensing fiber g...
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Abstract
The invention discloses a three-axis optical fiber grating strain measurement sensor with adjustable sensitivity. The strain measurement sensor includes a circular sensor base, a mounting arm extending inward along the inner circumference of the sensor base, and a mounting arm installed on the sensor base. The strain sensing optical fiber grating on the mounting arm, the mounting arm is provided with an optical fiber installation groove for accommodating the strain sensing optical fiber grating, and the optical fiber installation groove is provided with a fiber grating for fixing the strain sensing optical fiber grating An optical fiber fixing point and an optical fiber fixing buckle, the sensor base is provided with an installation hole for fixing the strain measurement sensor on the measured object. The sensitivity-adjustable three-axis optical fiber grating strain measurement sensor of the present invention can realize the adjustment of the strain measurement sensitivity of the strain measurement sensor, and adopts three strain sensing optical fiber gratings arranged in different directions, and can simultaneously realize the three-axis measurement at the measuring point. Strain measurement in one direction improves the measurement accuracy of the sensor.
Description
technical field [0001] The invention belongs to the technical field of sensor design and strain measurement, and in particular relates to a three-axis optical fiber grating strain measurement sensor with adjustable sensitivity. Background technique [0002] A fiber grating is a passive fiber device in which the refractive index of the medium at a specific position in the fiber core changes periodically. By measuring the change of the central wavelength of the grating, the measurement of multiple parameters such as temperature, strain, and pressure can be realized. [0003] At present, the fiber grating strain measurement sensor can realize the strain measurement in a single direction at the measuring point of the measured object. When it is necessary to determine the principal stress direction of the measuring point, at least three fiber grating strain measurement sensors need to be arranged at a certain angle, which is not only time-consuming and laborious to install, but ...
Claims
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IPC IPC(8): G01B11/16
CPCG01B11/165G01B11/18
Inventor 薛飞王红珂陈志林徐德城林磊余伟炜周帅
Owner SUZHOU NUCLEAR POWER RES INST