摘要
为解决压力传感器的温度稳定性问题 ,设计一种压力温度双参量光纤传感器 ,并在理论上分析了从一个敏感晶体上分离出温度压力两种信息的可能性。传感器以石英晶体作为敏感元件 ,通过合理安排传感头中各部件 ,只需一个敏感元件就可同时输出两路信号 :一路是弹光效应引起的压力信号 ;另一路是石英晶体旋光效应的信号。由于旋光效应与温度有关 ,旋光效应的信号可用来反映传感头光路上的温度。文中给出了实验装置 ,实验结果与理论相符。结果显示 :在 90℃温度范围内压力的精度可达 0 .1 %,温度的精度为± 1℃ 。
A fiber optic sensor with only one sensing head was designed for the simultaneous measurement of pressure and temperature to solve the long term stability problem of pressure sensors. The separation of the pressure and temperature measurements from a single sensing head is analyzed theoretically. With quartz as the sensing element and a 1/4 wave plate behind the quartz, the sensing head can simultaneously output two signals, one is the photo elastic effect for pressure measurement while the other is the optical effect for the temperature. The experimental results show that a pressure accuracy of 0.1% for temperature variation of 90℃ with a temperature detection accuracy of ±1 ℃. The sensor can meet the performance demands for oil tank measurements.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第7期74-76,共3页
Journal of Tsinghua University(Science and Technology)
