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中文摘要：
针对传统刚M—FOS中LED耦合多模光纤作为照明光纤灵敏度低的不足，引入了LD耦合单模光纤作为照明光纤的RIM—FOS光强调制模型并设计了LD耦合单模光纤作为照明的RIM—FOS位移传感实验系统。实验系统由激光器模块、光学单元、光电探测单元、信号检测与信息采集单元、FPGA控制模块、上位机系统和电源模块等组成。归一化实验结果验证了仿真模型的正确性，并得出RIM—FOS前坡灵敏度3．15mV／μm，线性测量范围为380μm；后坡灵敏度为0．76mV／μm，线性测量范围为690μm的性能指标。实验表明：该实验系统具有较好稳定性和重复性，可应用于单模光纤照射的RIM—FOS更深一步的研究。
英文摘要：
To overcome the shortcoming of low sensitivity in RIM-FOS with LED illuminating, a theoretical model was introduced and an experiment system was designed using LD coupling with single mode fiber as illumination purpose. The system is made up with LD module, optic module, PIN detection module, signal collection module, FPGA module, up computer system and power module. The validation of model was proved by experiment results and the performance of RIM-FOS was presented. Experimental results indicate a sensitivity of 3.15 mV/μm and linear region of 380μm for front slope, a sensitivity of 0.76 mV/μm and linear region of 690 p,m for back slope of RIM-FOS. Good stability and repetition are proved for system, and the system will play a significant effect for the further study of RIM-FOS with single mode illumination.
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