1333 形状記憶合金アクチュエータによる蠕動運動を有する人工食道の開発(J14-7 知的材料・構造システム(7) 各種アクチュエータ,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

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  • 1333 Development of an Artificial Esophagus with Peristaltic Motion using Shape Memory Alloy Actuators

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Artificial esophageal actuator with peristaltic motion was developed. This actuator utilizes SME property of SMA coil springs, and has a role of transporting boluses. First of all, the human esophageal properties were detailed description, and an SMA spring used here was estimated experimentally in order to design the actuator. Based on those data, the actuator making use of SMA springs was designed and fabricated. In addition, sequential logic control system for actuator motion was constructed to imitate esophageal function, namely peristalsis. Its conveying ability was estimated using jelly as a pseudomasticated food. It was found that the actuator was able to transport jelly against gravity. Bolus transporting velocity, however, was a little lower than that of the human esophagus.

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