Method for calibrating surface-mounted fiber grating strain sensor
A technology of strain sensor and optical fiber grating, which is applied in the direction of instruments, optical devices, measuring devices, etc., can solve the problem that the influence of the strain sensitivity of the strain optical fiber grating strain sensor is not considered, and the measured value of the optical fiber grating deviates from the true strain value of the object under test , deviation of actual strain measurement results and other issues, to achieve the effect of accuracy guarantee, temperature stability, and small temperature fluctuation interference
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[0022] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings in order to better understand the present invention.
[0023] The calibration method of the surface-mounted fiber grating strain sensor of the present invention uses the finite element analysis of the strain generated by the thermal expansion and contraction of the material to realize the calibration of the sensitivity coefficient of the fiber grating strain sensor. Such as figure 1 As shown, the calibration system of the fiber grating strain sensor calibration method of the present invention includes a computer 1, a fiber grating demodulator 2, a constant temperature bath 3, a standard part 4, a fiber grating temperature sensor 5, and a fiber grating strain sensor 6. Such as figure 2 As shown, the fiber grating strain sensor is pasted on the standard part in the horizontal direction, and the fiber grating temperature sensor is arranged near the fiber g...
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