Fiber grating inclination sensor of temperature self-compensation type

Abstract

The invention discloses a fiber grating inclination sensor of temperature self-compensation type. The inclination sensor comprises a packing box. A cantilever rod with a fixed end is arranged in the box. A free end of the cantilever rod is fixed with a heavy mass block. Four sides of the fixed end of the cantilever rod are respectively provided with a fiber grating strain sensor. The mass block is provided with a temperature compensation sensor. When the packing box inclines together with the cantilever rod, the fiber grating strain sensor on the cantilever rod can monitor the strain change so as to measure the inclination angle. The temperature compensation sensor can eliminate the influence of temperature on the inclination sensor, and the self-compensation of the inclination sensor can be realized by quasi-distribution. The inclination sensor has simple process and low cost and is suitable for industrial production. The arrangement is convenient, as the inclination sensor can be directly arranged inside or outside a tested structure so as to facilitate the operation and realize high accuracy. In addition, one signal collecting and analyzing device can be used for recording the data of a plurality of inclination sensors.

Description

Technical field [0001] The invention relates to a tilt angle detection device, in particular to a device for measuring the tilt angle of a structure. Background technique [0002] Fiber grating has small size, good wavelength selectivity, is affected by nonlinear effects, is extremely insensitive, is easy to connect with fiber systems, is easy to use and maintain, has a large bandwidth, small additional loss, miniaturization of components, good coupling, and can be used with Other fiber optic components are integrated and other characteristics. Moreover, the production process of fiber grating is relatively mature, easy to form large-scale production, and low cost. Therefore, it has good practicability and its superiority cannot be replaced by other devices. This makes fiber grating and fiber grating-based devices widely used in many fields. application. [0003] However, due to the small diameter and brittle texture of the optical fiber itself, it is easy to be damaged. It is ne...

AI Technical Summary

Problems solved by technology

Many current inclination angle measuring instruments are cumbersome to use, and the measurement accuracy for small angle changes is not high, while the fiber grating inclination sensor is relatively simple to use, as long as it is installed on the measured structure correctly, and the data is recorded through an external acquisition system, can accurately measure the inclination angle of the measured structure

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