Two-Dimensional Optical Fiber Displacement Sensor Based on Macrobend Loss Effect and Power Coupling

Abstract

The invention discloses a two-dimensional fiber displacement sensor based on macrobend loss effect and power coupling. A Y-axis moving plate and an X-axis moving plate are mounted on the plane; a first passive optical fiber and a second passive optical fiber are both twisted with an active optical fiber; the active optical fiber is twisted with the first passive optical fiber to form a first twisted fiber after one end of the active optical fiber is connected to the LED light source; an initial section of the first twisted fiber is fixed on the Y-axis moving plate, and the remaining part is bent to form a macrobend coupling structure; one end of the first passive optical fiber is idle, and the other end is connected to the first optical power meter; the active optical fiber is twisted withthe second passive optical fiber to form a second twisted fiber after twisting with the first passive optical fiber; the initial section of the second twisted fiber rotates around the circular section of the first twisted fiber to form another macrobend coupling structure; the end section of the second twisted fiber is fixed on the X-axis moving plate after the second twisted fiber passes throughthe lower part of the first twisted fiber; and the second passive optical fiber is connected to the second optical power meter. The two-dimensional fiber displacement sensor based on macrobend loss effect and power coupling has the advantages of high sensitivity, fast response and high resolution.

Description

technical field [0001] The invention relates to the application field of optical fiber macrobending coupling, in particular to a two-dimensional optical fiber displacement sensor based on macrobending loss effect and power coupling, which is suitable for industrially detecting displacement in two-dimensional directions. Background technique [0002] In the past few decades, fiber optic sensors have achieved more substantial research results due to their detection speed, potential sensitivity, resolution, and ability to detect multiple conditions. Compared with traditional sensors, fiber optic sensors have the characteristics of anti-electromagnetic interference, light weight, and high sensitivity. According to the topology of fiber optic sensors, fiber optic sensors are divided into three categories: single-point sensors, multi-point sensors and distributed sensors. In practical use there is a different type of fiber optic sensors among which displacement sensors are widely...

AI Technical Summary

Problems solved by technology

[0005] In order to achieve two-dimensional displacement measurement, two sets of one-dimensional displacement sensors are usually used to complete the two-dimensional measurement method, but this two-dimensional measurement method not only increases the application cost, but also is more inconvenient to use, and it is difficult to meet such a high accuracy

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