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介绍了力学量中载荷和角位移的测量传感器。其方法是利用光导纤维作为传感器主要元件，被测载荷使弹性元件变形，使光纤端面间光的耦合效率发生变化，通过测量光通量的变化而测知载何和角位移的大小。在载荷测量中特殊布置光纤的位置，通过电路对信号的差分处理能达到提高传感器线性度的目的。最后的传感器输出结果其非线性大为减小。角位移的测试中，这种角位移光纤传感器灵敏度高，分辨率小，适合于扭转试件的微小角位移测量。这类光纤传感器用于力学量测试可弥补一些传统测量方法的不足。
The measurement sensors for the load and angular displacement in mechanical quantities are introduced. The method uses optical fiber as the main component of the sensor, the measured load deforms the elastic element, the coupling efficiency of light between the optical fiber end faces changes, and the magnitude of the load and the angular displacement are measured by measuring the change of the luminous flux. In the load measurement, the position of the fiber is specially arranged, and the differential processing of the signal by the circuit can achieve the purpose of improving the linearity of the sensor. The final sensor output results in a much smaller nonlinearity. In the angular displacement test, this angular-displacement fiber-optic sensor has high sensitivity and small resolution, and is suitable for the measurement of the small angular displacement of the twisted test piece. This type of fiber optic sensor for mechanical testing can make up for the deficiencies of some traditional measurement methods.