In this paper, a novel differential reflective intensity optical fiber angular displacement sensor was proposed. This sensor can directly measure the angular and axial linear displacement of a flat surface. The structure of the sensor probe is simple and its basic principle was first analyzed according to the intensity modulation mechanisms. Secondly, in order to trim the dark output voltage to zero, the photoelectric conversion circuit was developed to adjust the signals. Then, the sensor model including the photoelectric conversion circuit has been established, and the influence of design parameters on the sensor output characteristic has been simulated. Finally, the design parameters of the sensor structure were obtained based on the simulation results; and an experimental test system was built for the sensor calibration. Experimental results show that the linear angular range and the sensitivity of the sensor were 74.4 and 0.051 V/°, respectively. Its change rules confirm the operating principle of the sensor well.
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机译：本文提出了一种新型的差分反射强度光纤角位移传感器。该传感器可以直接测量平面的角度和轴向线性位移。传感器探头结构简单，首先根据强度调制机理分析其基本原理。其次，为了将暗输出电压调整为零，开发了光电转换电路来调整信号。然后，建立了包括光电转换电路的传感器模型，并模拟了设计参数对传感器输出特性的影响。最后，基于仿真结果获得了传感器结构的设计参数。并建立了用于传感器校准的实验测试系统。实验结果表明，传感器的线性角度范围和灵敏度分别为74.4和0.051 V /°。其更改规则很好地确认了传感器的工作原理。
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