【摘要】 介绍了两种新颖的单端传感器的设计方案,即带反射镜的OCFC传感器和OCFC光纤环路传感器,研究了在不同应变下这些OCFC传感器的透过率谱,并建立解调系统,给出了在振动作用下这些传感器的输出量。由于这些传感器成本低,很容易制造,且OCFC光纤环路传感器有良好的低频和高频响应,解调系统结构简单、价格低廉,因此这种传感器很适于实际工程应用。更多还原

【Abstract】 The theory and experiment results of fiber optic vibration sensor based on over-coupled fused coupler(OCFC) is described,2 novel schemes to design single-end sensor is presented,i.e.OCFC sensor with a reflection mirror and OCFC fiber loop sensor,the transmission spectrum of these OCFC sensor when applied with different strains is investigated and interrogation system is developed,the output of these sensors when applied with vibration and shock is shown.The sensor is easy to be fabricated,it has good low and high frequency response and the interrogation system is simple,low cost,so that the OCFC fiber loop sensor is feasible to measure vibration signal practically.更多还原