摘要
利用半导体材料吸收光谱的临界极限值随温度变化发生移动而导致出射光强改变的特性 ,实现了海洋井下温度的检测。描述了反射式光纤传感器的结构和测量原理。提出了共光路参考测量结构的设计和节点式误差补偿技术 ,详细的理论分析表明 ,提出的传感器系统可以有效地改善光源强度波动、光电探测器件的响应度和电路的放大倍数差异等对测量带来的误差影响 ,从而可以适应海洋井下长期恶劣的工作环境 ,保证一定的测量稳定性。该传感器可以实现 - 2 0～ 175℃的温度测量范围。
A novel fiber optic sensor used for temperature measurement under the offshore oil well was proposed based on the displacement of the optical absorption edge occurring in semiconductors under the influence of temperature variation as a result of temperature induced energy shifting of conduction band extrema. The structure of the sensor and the measurement principle were described. The common path reference measurement and node type error compensation technologies were developed. And the detailed theoretical analysis indicated that the proposed sensor system could effectively improve measurement errors caused by the light fluctuation, difference and variation of the detector responsiveness and the circuit magnification times, the transmission loss, and so on. It approved that this sensor system could be applied under the long term formidable conditions with fairly good measurement stability. The temperature measurement range is from -20℃ to 175℃.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2003年第1期75-78,共4页
Chinese Journal of Lasers
关键词
反射式
温度测量
补偿技术
光纤传感器
海洋石油勘探
ocean mapping
temperature measurement
compensation technique
optical fiber sensor
reflex
offshore oil drilling
