Development of vibration sensing system with wide dynamic range: monitoring of scratching and turning-over motions during sleep

Yosuke Kurihara, Takashi Kaburagi, Kajiro Watanabe, Hiroshi Tanaka

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This paper describes a novel vibration sensing system with wide dynamic range for measuring “scratching”, “turning over” and “sitting up/lying down” motions in an unconstrained manner while the patient is sleeping. The sensing device used in the proposed system is composed of a piezoceramic sensor sandwiched between two metal plates. Under the system’s configuration, each piezoceramic sensor generates a measurable output voltage proportional to the wide-ranging amplitude of vibrations produced by “scratching”, “turning over” and “sitting up/lying down” motions. Furthermore, in order to detect the direction of “turning over” and “sitting up/lying down” motions, we defined two indices that could be calculated based on three output signals from the piezoceramic sensors placed under three legs of the bed. A validity experiment was carried out for comparison with a conventional sensing method for measuring “scratching”, “turning over” and “sitting up/lying down” motions. The results showed that the proposed vibration sensing system is valid in terms of accuracy without the need for attaching sensors to the patient’s body.

Original languageEnglish
Pages (from-to)372-378
Number of pages7
JournalArtificial Life and Robotics
Volume20
Issue number4
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • Piezoceramics
  • Scratching
  • Skin disease
  • Turning over
  • Vibration sensor

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Artificial Intelligence

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