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介绍利用光纤进行分布应变测量的技术。由于光纤适合用于复合材料,所以制成的装置可用于监测大复合基底的结构。这种双芯光纤传感器装置是一根包含两根间隔很近的串扰波导光学丝。用多波长光源照射单个传感器的输入端,用处理装置分析探测器响应传感器输出端发射的光而产生的信号。对于悬臂梁式的弯曲结构而言,传感器输出的傅里叶变换是加在这种结构上的弯矩分布。在传感器信号中还能识别点负载密度。
Describes the technique of using optical fiber for distributed strain measurement. Since the optical fiber is suitable for composite materials, the resulting device can be used to monitor the structure of a large composite substrate. This dual-core fiber optic sensor device consists of two closely spaced crosstalk waveguide optical fibers. The input of a single sensor is illuminated with a multi-wavelength light source and the signal generated by the detector in response to light emitted by the sensor output is analyzed by processing means. For cantilever bending structures, the Fourier transform of the sensor output is the bending moment distribution applied to this structure. In the sensor signal can also identify the point load density.