四电极含芯压电纤维简谐振动传感特性研究

受到水黾等动物能感知身体振动的毛发感受器的启发,设计了一种能感知外部振动的仿生纤维振动传感器。采用模具干压成型法制备了含铂金芯的压电陶瓷纤维胚体,经过高温烧结、涂镀表面电极、极化后,制成表面四电极含金属芯压电纤维(MMPF)振动传感器。并建立了悬臂梁结构,2对表面电极用作传感电极的传感器理论模型。把纤维固定在基体上,验证传感器对基体结构受到简谐激励的传感性能。结果表明,MMPF能够感知基体结构受到简谐激励的频率、幅值和方向。这种具有感知幅值和方向的仿生纤维振动传感器将有广泛的应用前景。

Study on the Simple Harmonic Vibration Sensing Characteristics of a Four electrodes Core Piezoelectric Fiber

Inspired by the water strider and other animals can perceive the body vibration by the hair sensors, a bionic fiber sensor is designed that can perceive the external vibration. The preparation of the piezoelectric ceramic fiber embryo body containing platinum core is prepared by the dry pressing molding in module, after high temperature sintering, coated electrode on the surface, after the polarization, the MMPF vibration sensor is fabricated. The cantilever beam structure is fabricated. Two pair of surface electrodes are used as the theoretical models of the sensing electrodes. The fiber is fixed on the substrate to verify the sensing performance of the sensor in which the substrate structure excited by the simple harmonic vibration. The results show that the MMPF can perceive the matrix structure under simple harmonic excitation frequency,amplitude and direction. This bionic fiber vibration sensors which can perceive the amplitude and direction will have a wide range of application prospects.