Gel Biter: food texture discriminator based on physical reservoir computing with multiple soft materials
Authors: 
Kosuke Hirose, Ikuma Sudo, Jun Ogawa, Yosuke Watanabe, M. D. Nahin Islam Shiblee, Ajit Khosla, Masaru Kawakami, Hidemitsu FurukawaAuthors Info & Claims
Pages 674 - 683
Abstract
The human oral structure contains organs with distinctly different physical properties, such as teeth, gums, and tongues. When food enters the oral cavity, we can recognize the tactile sensation and shape of the object from multiple perspectives through the texture of the teeth and tongue. Therefore, it is possible to regard oral structures as a group of tactile sensors based on these functions. In this study, we developed a soft-matter artificial mouth that can accurately detect subtle differences in texture by creating and combining oral structural organs using polymer materials with different physical properties and mounting them as end-effectors for a robot arm. The same piezoelectric film sensor was embedded inside each organ, making it possible to acquire tactile sensations from the same object as completely different signal waveforms. We tested whether the sensor data obtained from each soft-matter material could be used for excellent object recognition by applying various machine learning methods. In an actual experiment, we learned the waveform data obtained from chewing sweets and snacks, such as rice crackers, and applied machine learning to classify the data, which led to an accuracy rate of over 90%.
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Publication History
Published: 01 November 2022
Accepted: 01 October 2022
Received: 30 May 2022
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