工业用火灾预警光纤传感器及其传感特性

Industrial fire early warning optical fiber sensor and its sensing characteristics

火灾给人们的生产与生活带来极大的威胁,但现有的火灾传感器在安装空间、测量范围和适用环境等方面存在着局限性,因此需要研制新型火灾传感器。设计并实现了一种不锈钢毛细管可靠封装的工业用火灾预警光纤传感器,通过对光纤光栅进行高温再生处理,大幅提高了传统光纤光栅传感器的耐高温性能。对制备的传感器进行了实验,结果表明:该种传感器测量温度可达1000℃、线性度为0.99951,在1000℃下90%信号的响应时间不到3 s,适合于火灾预警。

Fire poses a great threat to people's production and life,but existing fire sensors have limitations in installation space,measurement range and applicable environment.Therefore,it is necessary to develop new types of fire sensors.This paper designs and implements an industrial fire warning optical fiber sensor that is reliably encapsulated by a stainless steel capillary tube.This paper greatly improves the high temperature resistance of traditional fiber grating sensors through high temperature regeneration processing of fiber gratings.Experiments on the prepared sensor show that the sensor can measure temperature up to 1000℃,linearity is 0.99951,and the response time of 90%signal at 1000℃is less than 3 s,it is suitable for fire warning.