论文部分内容阅读
基于光弹效应，研制了ＩＭ８５－Ⅰ 型光纤液位仪。其传感器内采用光桥式补偿光路，可以克服各种外界因素对测量产生的不利影响。根据补偿结构的要求，其发射－接收机采用双光源交替发光，双探测器同时探测的工作方式。但光源光谱稳定性和光电探测器光电转换的线性对测量结果都会有影响．分析表明：选择发光二极管作光源，硅ＰＩＮ管作探测器．采用Ⅰ－Ｖ光电转换方式，可以满足没计要求。仪器的精度为０．２％．
Based on photoelastic effect, IM85-Ⅰ optical fiber level gauge was developed. The optical bridge within the sensor compensation optical path, you can overcome the various external factors have adverse effects on the measurement. According to the requirements of the compensation structure, the transmitter-receiver uses double light source to alternately emit light and double detectors to detect the working mode at the same time. However, the spectral stability of the light source and the linearity of the photoelectric detector photoelectric conversion will have an impact on the measurement results. Analysis shows that: choose LED as light source, silicon PIN detector. Using Ⅰ-V photoelectric conversion, can meet the requirements of no account. The accuracy of the instrument is 0.2%.