• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (11): 362-371.doi: 10.3901/JME.260601

• 数字化设计与制造 • 上一篇    

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流致振动俘能自供电流量计设计与性能综合评价

李金霞1, 林纪1, 孙宏军2, 李双宝3   

  1. 1. 中国民航大学电子信息与自动化学院 天津 300300;
    2. 天津大学电气自动化与信息工程学院 天津 300072;
    3. 中国民航大学科技创新研究院 天津 300300
  • 收稿日期:2025-08-02 修回日期:2025-12-02 发布日期:2026-07-29
  • 作者简介:李金霞,女,1988年出生,博士,讲师。主要研究方向为多相流测量、涡动力学和振动俘能技术。E-mail:lijinxia@tju.edu.cn;孙宏军(通信作者),女,1974年出生,博士,副教授,博士研究生导师。主要研究方向为流量测量、多相流、传感器和信号处理。E-mail:sunhongjun@tju.edu.cn
  • 基金资助:
    天津市教委科研计划资助项目(2022KJ065)。

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

摘要: 为解决分布式流量计在偏远地区的供电困难问题,提出基于流致振动压电俘能的自主供电流量计并进行优化设计。通过安装在圆柱上的对称方形附加物引起被动湍流控制(Passive turbulence control,PTC),从而对振动模式进行调制。分析了0~180°范围内PTC放置角度对振动的影响,发现40°~75°、115°~155°时高流速引发驰振现象,此时振幅随流速单调递增;其他PTC角度则为涡振模式,此时高流速时频率随流速单调递增。利用不同振动模式的单调特性,分别提出了基于频率和幅值的流量计量方法。然后,综合俘能-计量协同需求,考虑输出功率、计量精度和可靠性等指标,利用基于熵权法-逼近理想解排序法(Entropy weight method-technique for order of preference by similarity to ideal solution,EWM-TOPSIS)的自适应权重评价方法振子优化,发现幅值计量最优PTC角度为45°、频率计量则为160°。最后,设计了能量管理-信号处理复用的自供电模块并进行了实流试验,最大占空比14.3%,重复性优于1%,精度优于5%,量程比优于6:1,尤其适合在人力难以到达的环境中进行管路流量计量和泄漏监测等。

关键词: 流致振动, 被动湍流控制, 自供电, 流量计量

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

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