FIBER OPTIC TEMPERATURE MEASURING SYSTEM  

作　　者：马乃兵[1] 骆飞[1] 孟爱东[1] 杨春[1] 

机构地区：[1]南京航空航天大学测试工程系

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》1998年第2期34-38,共5页南京航空航天大学学报（英文版）

基　　金：江苏省青年科技基金

摘　　要：This paper presents a fiber optic temperature measuring system used for measuring the temperature in many occasions. The system is of reflective type and composed of thermostatic bimetal plate, lever piston framework, optical grating and optical fiber probes. When the temperature changes, the thermostatic bimetal plate deforms. Through lever piston framework, the optical grating produces displacement in the upright direction. Thus the change of the temperature is transformed into the upright displacement of the optical grating. Optical fiber probes are used for detecting the number of streak lines of the optical grating′s displacement depending on the change of temperature. The detected signal can be transmitted to the control center through optical fiber cable up to distance of 1 km. The measurable range of this system reaches 100℃ with accuracy of ±0.2℃.提出了一种可用于多种场合的光纤温度检测系统。该系统具有反射式结构，由热双金属片、连杆－活塞机构、光栅及光纤探头组成。温度变化引起热双金属片变形，通过连杆－活塞机构，使得光栅在竖直方向移动。光纤探头用来检测由于温度变化引起光栅移动产生的条纹数。通过光纤光缆可以将检测信号传输１ｋｍ以上，系统的温度测量范围达到１００℃，精度达±０．２℃。

关 键 词：optical fibers SENSORS TEMPERATURES thermostatic bimetal  plates optical gratings 

分 类 号：TN25[电子电信—物理电子学]