Design and Fabrication of a Bio-inspired Acceleration Sensor Using Liquid Mass Blocks  

作　　者：BIAN Yixiang ZHANG Yi ZHANG Yanjun GONG Junjie JIN Hong DAI Longchao 

机构地区：[1]College of Mechanical Engineering,Yangzhou University

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2019年第1期154-161,共8页南京航空航天大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos. 51775483 and 51275447);the Research Innovation Program for College Graduates of Jiangsu Province(No.SJLX_0589)

摘　　要：A linear acceleration sensor,which is inspired by the human balance organ,is designed and prepared. It uses a liquid mass-block and a symmetrical-electrodes metal-core polyvinylidene fluoride fiber(SMPF)as the sensor element. The output signal of the sensor has an exponential relationship with the excitation amplitude of the impacting vibration. It is capable of detecting the amplitude and the correct frequency for sinusoidal excitations using an exponential correlation. The experiments indicate that both the output signal of the sensor and the resonance frequency increase substantially with increasing diameter of the metal core. The first-order resonance frequencies of the sensors with 40,60,and 80 μm diameter metal wires are below 10 Hz,which is near the range of human body motion frequencies.A linear acceleration sensor,which is inspired by the human balance organ,is designed and prepared. It uses a liquid mass-block and a symmetrical-electrodes metal-core polyvinylidene fluoride fiber(SMPF)as the sensor element. The output signal of the sensor has an exponential relationship with the excitation amplitude of the impacting vibration. It is capable of detecting the amplitude and the correct frequency for sinusoidal excitations using an exponential correlation. The experiments indicate that both the output signal of the sensor and the resonance frequency increase substantially with increasing diameter of the metal core. The first-order resonance frequencies of the sensors with 40,60,and 80 μm diameter metal wires are below 10 Hz,which is near the range of human body motion frequencies.

关 键 词：ACCELERATION sensor PVDF fiber BIOMIMETIC liquid MASS 

分 类 号：TM282[一般工业技术—材料科学与工程]