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本文提出了一种可用于航空发动机进口温度测量的光纤传感系统。这种双光纤传感系统是通过检测光偏振态的变化来测量温度特性的。以蓝宝石单晶片作为探头中的敏感元件，可耐２０００℃以上的高温。并且利用蓝宝石晶体的双折射特性得到关于温度的信息。本文从物理模型和数学分析上证实了这种传感器的可行性。用光纤传感器代替传统的发动起进口温度测量系统，可以促进全权数字式电子探制系统再新一代航空发动机中的应用。
This paper presents a fiber optic sensing system that can be used to measure the inlet temperature of aeroengine. This dual-fiber sensing system measures temperature characteristics by detecting changes in the polarization state of light. Sapphire single-chip as a probe in the sensitive components, can withstand high temperatures above 2000 ℃. And information on temperature is derived using the birefringence properties of the sapphire crystal. This paper validates the feasibility of this sensor from the physical model and mathematical analysis. The use of optical fiber sensors instead of the traditional boot-up temperature measurement system can promote the application of full-power digital electronic exploration system to the next generation of aeroengines.