Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China.
Sensors (Basel). 2019 Apr 6;19(7):1657. doi: 10.3390/s19071657.
To measure the flow velocity of a fluid without affecting its motion state, a method was proposed based on a polyvinylidene fluoride (PVDF) piezoelectric film sensor. A self-made PVDF piezoelectric sensor placed parallel with the flow direction was used to measure the flow velocity. First, the piezoelectric characteristics of PVDF were obtained theoretically. Next, the relationship between flow velocity and sound pressure was verified numerically. Finally, the relationship between flow velocity and the electrical output of the PVDF piezoelectric film was obtained experimentally. In conclusion, the proposed method was shown to be reliable and effective.
为了在不影响流动物体运动状态的情况下测量其流速，提出了一种基于聚偏二氟乙烯（PVDF）压电薄膜传感器的方法。使用与流向平行放置的自制 PVDF 压电传感器来测量流速。首先，从理论上获得了 PVDF 的压电特性。然后，通过数值验证了流速和声压之间的关系。最后，通过实验获得了 PVDF 压电薄膜的流速与电输出之间的关系。总之，该方法被证明是可靠且有效的。
