基于PVDF的仿生侧线传感器设计与标定

Bionic lateral line sensor design and calibration based on PVDF

海流测量在海洋科学研究中有着重要作用,研究发现,鱼类的侧线系统可对周围水流的强度、方向、水压等信息进行精确感知。基于该生物学原理,采用压电特性突出的聚合物压电材料聚偏二氟乙烯(PVDF)设计仿生侧线传感器,使用计算流体动力学(CFD)方法优化传感器结构参数,结合流体力学、压电效应建立传感器理论模型。实验表明:仿生侧线传感器实际测量值与理论模型拟合良好,流速测量范围为0.02~0.5 m/s,精度小于4%。

Ocean current measurement plays an important role in marine scientific research.Studies on the lateral line system show that it can accurately perceive the strength, direction, water pressure and other information of the surrounding water flow.Based on this biological principle, the bionic lateral line sensor is designed with polyvinylidene fluoride(PVDF),which is a polymer piezoelectric material with outstanding piezoelectric characteristics.The parameter and structure of the sensor are optimized by the computational fluid dynamics method.The theoretical model of the sensor is established by combining the hydrodynamics and piezoelectric effect.The experimental results show that the actual measurement value of bionic line sensor fits the theoretical model well.The flow velocity measurement range is 0.02~0.5 m/s, and the precision is less than 4 %.