• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2026, Vol. 62 ›› Issue (11): 362-371.doi: 10.3901/JME.260601

Previous Articles    

Design and Optimization of a Self-powered Flow Meter Based on Flow-induced Vibration Energy Harvesting

LI Jinxia1, LIN Ji1, SUN Hongjun2, LI Shuangbao3   

  1. 1. College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300;
    2. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072;
    3. Research Institute of Science and Technology, Civil Aviation University of China, Tianjin 300300
  • Received:2025-08-02 Revised:2025-12-02 Published:2026-07-29

Abstract: To address the power supply challenges of distributed flow meters in remote areas, a self-powered flow meter based on flow-induced vibration piezoelectric energy harvesting is proposed and optimized. Symmetrical square attachments installed on a cylinder induce passive turbulence control (PTC) to modulate the vibration mode. The impact of PTC placement angles ranging from 0° to 180° on vibration is analyzed. High flow rates induce galloping phenomena at angles of 40° - 75° and 115° - 155°, with amplitude monotonically increasing with flow rate. At other PTC angles, vortex-induced vibration modes are observed, with frequency monotonically increasing with flow rate at high flow rates. Utilizing the monotonic characteristics of different vibration modes, flow metering methods based on frequency and amplitude are proposed, respectively. Considering the synergistic requirements of energy harvesting and flow measurement, the EWM-TOPSIS adaptive weight evaluation method is employed to optimize the oscillator based on output power, measurement accuracy, and reliability. The optimal PTC angle for amplitude measurement is found to be 45°, while for frequency measurement, it is 160°. Finally, an energy management-signal processing multiplexing self-powered module is designed and subjected to real-flow tests, achieving a maximum duty cycle of 14.3%, repeatability better than 1%, accuracy better than 5%, and a turndown ratio better than 6:1. This design is particularly suitable for flow measurement and leakage monitoring in environments that are difficult to access by humans.

Key words: flow-induced vibration, passive turbulence control, self-powered, flow measurement

CLC Number: