模仿昆虫感觉毛的结构,设计制备了表面对称电极含金属芯PVDF气流传感器SMPF(Symmetric Metal core PVDF Fiber).利用自制的拉制纤维设备,制备了SMPF胚体.在表面涂镀对称电极后,经过高温极化、电极封装等工艺后,成功制备了SMPF气流传感器.基于第1类压电方程和流体力学理论,建立了悬臂梁结构的SMPF气流传感模型,分析了传感器输出信号与纤维长度、气流速度以及气流作用方向之间的关系.将悬臂梁结构的SMPF安置在气流流场中,进行冲击气流测试实验.实验结果表明,SMPF气流传感器的输出信号与纤维长度成非线性关系,与气流速度成平方关系,与气流作用方向成"8"字形关系.实验结果验证了理论模型,表明SMPF传感器能够感知气流的速度和作用方向,具有较广泛的工程应用前景.%Imitation of insect hair senses the structure of hair,a symmetric-electrodes metal core PVDF fiber (SMPF)airflow sensor was designed and fabricated. A SMPF embryo was successfully prepared using self-made drawn fiber equipment. After coated symmetrical electrodes on the surface,high temperature polarization,electrode packaging and other processes,a SMPF air flow sensor was successful fabricated. Based on the first type of piezoe-lectric equation and fluid mechanics theory,the SMPF airflow sensor model of cantilever structure is established. The SMPF of the cantilever structure is placed in the air flow field and the impact airflow test is carried out.The ex-perimental results show that the output signal of SMPF air flow sensor has a nonlinear relationship with the fiber length,which is in square relationship with the velocity of air flow and the"8"shape relationship with the direction of airflow. The experimental results verify the theoretical model. It is shown that the SMPF sensor can sense the speed and direction of the airflow and has a wide range of engineering application prospects.
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