中文摘要：

为解决传统的高温传感器不能满足对电解Al槽温等高温环境的实时在线测量问题，提出了基于波长调制的光纤Bragg光栅（FBG）高温传感系统，设计了一种新型封装结构的耐高温FBG传感头，具有体积小、灵敏度高和线性度好等特点；采用了基于InGaAs图像传感器衍射解调技术对光反射波长进行解调，缩短了系统的响应时间，提高了测量精度和稳定性。实验结果表明，本文系统在20-290℃的范围内，线性度达0．9992，灵敏度为0．0259nm／℃，精确度为±0．6℃，分辨率为0．1℃，响应时间小于15s，温度最大波动范围为±0．7℃。

英文摘要：

Traditional high temperature sensors are unsuitable for high temperature real-time online measurement. In order to solve the problem, a novel high temperature resistant fiber Bragg grating （FBG） sensing system based on wavelength modulation is developed. A new packaged high temperature; resistant FBG sensor head is designed in this system, which is small in volume and has high sensitivity and good linearity. The diffraction technique based on lnGaAs image sensor is used to demodulate the re- flected wavelength. The response time is reduced and the accuracy and stability are improved. The exper- imental results indicate that the system has linearity of 0. 999 2 ,sensitivity of 0. 025 9 nm/℃ ,accuracy of ±0.6℃ ,resolution of 0.1℃ and response time of less than 15 s in the range of 20--290 ℃. The stability experiment also shows that the maximum temperature fluctuation is ＋0.7 ℃.