Bending measurement structure of asymmetric double-core optical fiber, experimental instrument and sensor

Abstract

The invention relates to the technical field of bending detection, and provides a bending measurement structure of an asymmetric double-core optical fiber, an experimental instrument and a sensor. The bending measurement structure of the asymmetric double-core optical fiber comprises an optical fiber sensing unit, a bending measurement unit and a bending measurement unit, the optical fiber sensing unit at least comprises a section of double-core optical fiber, and the double-core optical fiber is provided with two asymmetric fiber cores; the optical fiber sensing unit is fixed on the bending plate, and the optical fiber sensing unit is straightly extended from one end of the bending plate to the other end of the bending plate; the light source is connected to a port at one end of the optical fiber sensing unit; and the photoelectric detection device is connected to a port at the other end of the optical fiber sensing unit. According to the bending measurement structure of the asymmetric double-core optical fiber, the characteristic that the sensitivity degrees of the two fiber cores of the double-core optical fiber to external bending changes are inconsistent is utilized, the bending degree is measured, the bending direction is distinguished, the sensitivity is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of bending detection, in particular to an asymmetric double-core optical fiber bending measurement structure, an experimental instrument and a sensor. Background technique [0002] Bending testing is a test to determine the mechanical properties of a material under bending load, and it is one of the basic methods for testing the mechanical properties of materials. In addition, when performing bending detection, it is also necessary to measure the bending degree of the material to obtain the mechanical properties of the material. [0003] In the prior art, in order to measure the bending degree and bending direction, multiple sets of photoelectric probes can be set in the extending direction of the measured object, and the positional deviation of the measurement point is calculated by imaging to determine the bending degree of the measured object. . [0004] However, in the bending measurement structure and...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a bending measurement structure, an experimental instrument and a sensor of an asymmetrical double-core optical fiber, which are used to solve the defects of complex bending measurement structure and low sensitivity in the prior art, and realize the improvement of the sensitivity of bending measurement

Images