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Modal Analysis and Experiment of a Lycium barbarum L. Shrub for Efficient Vibration Harvesting of Fruit

Author

Listed:
  • Jian Zhao

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Satoru Tsuchikawa

    (Graduate School of Bioagricultural Sciences, Nagoya University, Furo-Cho, Chikusa, Nagoya 464-8601, Japan)

  • Te Ma

    (Graduate School of Bioagricultural Sciences, Nagoya University, Furo-Cho, Chikusa, Nagoya 464-8601, Japan)

  • Guangrui Hu

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Yun Chen

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Zhiwei Wang

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Qingyu Chen

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Zening Gao

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

  • Jun Chen

    (College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Xianyang 712100, China)

Abstract

The most common harvesting method of Lycium barbarum L. ( L. barbarum ) is manual harvesting, resulting in low efficiency and high cost. Meanwhile, the efficiency of vibration harvesting, which is considered an efficient mechanical harvesting method, can be significantly improved if the optimized resonance frequency of the shrub can be obtained. To vibration harvest fruit efficiently, a 3D model of the shrub was established based on measurements of the shape parameters, and material mechanics models of the branches were established based on physical tests. The modal analysis of the shrub based on finite element method (FEM) simulation was performed to obtain the range of resonance frequency, and the modal experiment of the shrub using acceleration sensors and an impact hammer was conducted to obtain the accurate resonance frequency. Based on the results of the modal analysis and experiment, the optimized resonance frequency was determined to be 2 Hz. The field experiment showed that the fruit fell off when the branches were vibrated at this frequency. The results provide the design basis for the efficient vibration harvesting of L. barbarum .

Suggested Citation

  • Jian Zhao & Satoru Tsuchikawa & Te Ma & Guangrui Hu & Yun Chen & Zhiwei Wang & Qingyu Chen & Zening Gao & Jun Chen, 2021. "Modal Analysis and Experiment of a Lycium barbarum L. Shrub for Efficient Vibration Harvesting of Fruit," Agriculture, MDPI, vol. 11(6), pages 1-14, June.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:6:p:519-:d:568054
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    References listed on IDEAS

    as
    1. Tippawong Rodjanatham & Tenzin Rabgyal, 2020. "Quality Assurance of International Fruit Supply Chains via Techno-Management," Agriculture, MDPI, vol. 10(4), pages 1-12, April.
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    Cited by:

    1. Yaohua Hu & Junzhe Feng & Yichen Qiao & Chenhao Yu & Wenkai Luo & Kaili Zhang & Runfeng Liu & Runzhe Han, 2023. "Research and Validation of Vibratory Harvesting Device for Red Jujube Based on ADAMS and ANSYS," Agriculture, MDPI, vol. 13(7), pages 1-23, June.
    2. Guangchao Zhan & Lina Ma & Wangyuan Zong & Wei Liu & Dinglin Deng & Guodang Lian, 2022. "Study on the Vibration Characteristics of Rape Plants Based on High-Speed Photography and Image Recognition," Agriculture, MDPI, vol. 12(5), pages 1-14, May.
    3. Delin Wu & Enlong Zhao & Dong Fang & Shan Jiang & Cheng Wu & Weiwei Wang & Rongyan Wang, 2022. "Determination of Vibration Picking Parameters of Camellia oleifera Fruit Based on Acceleration and Strain Response of Branches," Agriculture, MDPI, vol. 12(8), pages 1-18, August.
    4. Yanchun Yao & Xiaoke Li & Zihan Yang & Liang Li & Duanyang Geng & Peng Huang & Yongsheng Li & Zhenghe Song, 2022. "Vibration Characteristics of Corn Combine Harvester with the Time-Varying Mass System under Non-Stationary Random Vibration," Agriculture, MDPI, vol. 12(11), pages 1-16, November.
    5. Han Lin & Jin He & Hui Li & Hongwen Li & Qingjie Wang & Caiyun Lu & Yanjie Li & Shaomei Jiang, 2022. "A Review of Research Progress on Soil Organic Cover Machinery in China," Agriculture, MDPI, vol. 12(9), pages 1-20, August.

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