Fiber Bragg grating angle sensor

Abstract

The invention relates to a fiber Bragg grating angle sensor, which comprises a rigid rotating long end (10) and a rigid rotating short end (20), wherein the rigid rotating long end (10) and the rigid rotating short end (20) form a rotating pair mechanism (50); the rigid rotating long end (10) comprises a rigid member (11); the rigid member (11) comprises a rigid rod and a fixed member, and the rigid rod is rotatably connected with the rigid rotating short end (20) through a joint (13). The fiber Bragg grating angle sensor further comprises at least two fiber Bragg grating elements (30), wherein the two fiber Bragg grating elements (30) are respectively arranged at two sides of the rigid rod; two segments of each fiber Bragg grating element (30) are fixedly connected with the fixed member and the rigid rotating short end (20) respectively. The fiber Bragg grating angle sensor also comprises a pre-tension applicator (22) which is used for tensioning the fiber Bragg grating elements (30). The fiber Bragg grating angle sensor is ingenious in design and high in practicability. 一种光纤布拉格光栅角度传感器，包括刚性转动长端(10)和刚性转动短端(20)；刚性转动长端(10)与刚性转动短端(20)构成转动副机构(50)；刚性转动长端(10)包括刚性构件(11)；刚性构件(11)包括通过接头(13)与刚性转动短端(20)可转动连接的刚性杆以及固定件；光纤布拉格光栅角度传感器还包括至少两个光纤布拉格光栅元件(30)，其中有两个光纤布拉格光栅元件(30)分别设置在刚性杆的两侧；每个光纤布拉格光栅元件(30)的两个线段分别与固定件和刚性转动短端(20)固定连接；光纤布拉格光栅角度传感器还包括用于张紧光纤布拉格光栅元件(30)的预张力施加器(22)。本发明的光纤布拉格光栅角度传感器设计巧妙，实用性强。