利用高分子压电薄膜设计位移传感器

摘要

以一端固定、另一端为任意边界条件的振动梁为例,文中提出通过分部积分方法设计特定形状的PVDF薄膜测量其结构位移.这种分部积分方法得到的PVDF位移传感器形状不但与外激励力的性质(如激励力类型、位置以及频率等)无关,而且不需要振动梁的模态信息.实验结果表明:这种位移传感器的设计是可行的.%With the example of vihrating beams with one clamped end and another arbitrary boundary condition end ,this paper presented a new methodology to design the displacement sensor using a shaped PVDF ( polyvinylidene fluoridc) film based on the basis of the imegral in parts approach.The PVDF sensor shape was shown independent of property of thP excitation ( the type, position and frequency,etc.).Furthermore,the design method does not require knowledge of the struclural mode shapes of the structures.The experimental resuhs show the feasibility of this new type displacement sensor.