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

Haobo Jiao, Juming Luo, Aifei Tang, Lihong Wang, Chen Ma, Yaping Li and Chengsong Li ()
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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

Agriculture, 2024, vol. 14, issue 4, 1-12

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.

Keywords: fruit trees; DSEE; eccentric block; acceleration; vibration (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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