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Design and Testing of the Double-Symmetric Eccentric Exciter for Fruit Tree Vibration Harvest

Author

Listed:
  • Haobo Jiao

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Juming Luo

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Aifei Tang

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Lihong Wang

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Chen Ma

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Yaping Li

    (College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832000, China)

  • Chengsong Li

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China
    Key Laboratory of Agricultural Equipment in Hilly and Mountainous Areas, Chongqing 400715, China)

Abstract

The amplitude of excitation force from exciters used in fruit tree vibration harvesting remains constant at a given frequency, leading to poor fruit detachment ratio and tree damage. A solution has been proposed through the development of a Double-Symmetric Eccentric Exciter (DSEE). This new exciter allows for the adjustment of excitation force amplitude while maintaining a constant frequency by varying the phase angle of the DSEE. To validate the effectiveness of the DSEE, vibration tests were conducted on fruit trees using different parameter exciting forces. Acceleration sensors were employed to measure the vibration accelerations of the tree branches. The experimental results revealed that when a fixed frequency excitation force with a constant phase angle was applied to the trunk, the vibration acceleration of branches exhibited inconsistent variations due to differences in the vibration differential equation parameters of each branch. Furthermore, it was observed that increasing the phase angle of the DSEE at a fixed frequency led to larger vibration accelerations in every branch. This signifies that adjusting the phase angle of the DSEE can effectively increase the amplitude of the exciting force. Consequently, the ability to control both the amplitude and frequency of the excitation force independently can mitigate issues such as low fruit harvest rates and minimize damage to fruit trees.

Suggested Citation

  • Haobo Jiao & Juming Luo & Aifei Tang & Lihong Wang & Chen Ma & Yaping Li & Chengsong Li, 2024. "Design and Testing of the Double-Symmetric Eccentric Exciter for Fruit Tree Vibration Harvest," Agriculture, MDPI, vol. 14(4), pages 1-12, April.
  • Handle: RePEc:gam:jagris:v:14:y:2024:i:4:p:570-:d:1369233
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