可自供电柔性振动监测电子器件的研究

Research on Self-powered Flexible Vibration Monitoring Electronic Devices

研究了一种柔性振动监测电子器件的振动及输出特性。以聚甲基丙烯酸甲酯(PMMA)为衬底,聚四氟乙烯(PTEE)与聚偏氟乙烯(PVDF)为柔性薄膜制备成柔性材料,对其摩擦电效应进行了分析,结合其自身的供电特性,提出了一种双螺旋结构,应用物理模型理论分析振动频率监测的可能性,并进行了公式推导。利用电动振动筛进行振动模拟,使用示波器等实验仪器对输出电压值进行测量。结果表明,器件的固有频率为26 Hz左右,响应时间小于150 ms,能够实现检测0~26 Hz的振动频率,自身具有供电特性,最高开路电压为45 V。

Vibration and output characteristics of a flexible vibration monitoring electronic device are studied.A flexible material is prepared by using polymethyl methacrylate(PMMA)as a substrate,polytetrafluoroethylene(PTEE)and polyvinylidene fluoride(PVDF)as flexible films.The triboelectric effect is analyzed,combined with its own power supply characteristics,a double helix structure is proposed,and the possibility of vibration frequency monitoring is analyzed using physical model theory,and the formula is derived.We use electric vibrating screen for vibration simulation,and use oscilloscope and other laboratory instruments to measure the output voltage value.The experimental results show that the natural frequency of the device is about 26 Hz,and the response time is less than 150 ms.It can detect the vibration frequency with the range of 0-26 Hz.It has power supply characteristics,and the maximum open circuit voltage is 45 V.