用于薄结构振动测量的分布式光纤模态传感器的初探

Study on Optical Fiber Modal Sensor Used for Vibration Measurement ofThin Structures

虽然应变传感器己广泛用于弹性振动的动态测量中,但当被测结构为薄结构时,应变幅值很小,需要检测元件有极高的灵敏度,而现有的测试方法和仪器难以满足要求。基于曲率变形的分布式光纤传感测量方法的提出使薄结构振动模态检测的研究有了新的突破和发展前景。

Although strain sensors have been used extensively for dynamic control of elastic vibrations, strain is difficult to measure in thin structures since extreme sensitivities are often required. An optical fiber distributed sensing strategy has been proposed for vibration mode measurement of thin structure based on the distributed measurements and the geometric curvature changes of the optical fiber in this paper.