A method of testing pear fruit firmness with dielectric elastomer actuator excitation

Toshiki Hiruta, Kaishi Sasaki, Naoki Hosoya, Shingo Maeda, Kentaro Takagi, Itsuro Kajiwara

研究成果: Conference contribution

1 被引用数 (Scopus)


The quality of pear fruits is correlated with their firmness, which is assessed by a firmness index derived from the resonance frequency and mass. Postharvest pear fruits ripen during storage, which affects the firmness. A nondestructive measurement technique is necessary to predict fruit firmness without causing any damage. Thus, this study proposes a vibration experiment technique based on dielectric elastomer actuator (DEA) excitation to determine the resonance frequency of pear fruits without any damage. Therefore, DEAs can be attached directly on fruits with curved surfaces because of their stretchability, light weight, and responsiveness and can be used to transfer the excitation force effectively. For our experiments, thin laminated DEAs were fabricated to obtain sufficient vibration excitation force, and resonance frequencies of the pear fruits were confirmed. Subsequently, the firmness indices of each target fruit were calculated and assessed. Finally, the variations in firmness indices of pear fruits during storage were confirmed, and the effectiveness of the proposed technique was validated.

ホスト出版物のタイトルElectroactive Polymer Actuators and Devices (EAPAD) XXV
編集者Herbert R. Shea
出版ステータスPublished - 2023
イベントElectroactive Polymer Actuators and Devices (EAPAD) XXV 2023 - Long Beach, United States
継続期間: 2023 3月 132023 3月 15


名前Proceedings of SPIE - The International Society for Optical Engineering


ConferenceElectroactive Polymer Actuators and Devices (EAPAD) XXV 2023
国/地域United States
CityLong Beach

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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