Highly sensitive smart cushion embedded with SMS structure for contactless vital signs and activity monitoring

Shuying Han, Wei Xu, Shanhong You, Bo Dong, Wei Zhao, Yishan Wang, Changyuan Yu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A smart cushion based on single-mode-fiber-multimode-fiber-single-mode-fiber (SMS) with core-offset splicing, which can simultaneously realize human vital signs monitoring and activity monitoring, is proposed and experimentally demonstrated. The SMS structure is sandwiched between a piece of fiberglass mesh and a polyvinyl chloride (PVC) layer and then embedded in a common home or office cushion, which is the component of the proposed cushion. When people sit on the cushion placed on a chair, micro-strain induced by human activity including respiration, heartbeat and body movement will change the output light intensity of the fiber structure. By signal processing algorithms including filtering, fast Fourier transform (FFT) and feature extraction, the respiration rate (RR) and heartbeat rate (HR) can be obtained and human activity state on the cushion including nobody state, movement state and normal state can be judged. Furthermore, the performances of two memory foam cushions with different thicknesses are compared and proven to be both available. Such a smart portable cushion can realize real-time, noninvasive and highly sensitive monitoring of vital signs and activities within the accuracy of one second, especially for the elderly in nursing homes and office workers.

Original languageEnglish
Title of host publicationOptoelectronic Devices and Integration IX
EditorsXuping Zhang, Baojun Li, Changyuan Yu, Xinliang Zhang
PublisherSPIE
ISBN (Electronic)9781510639096
DOIs
Publication statusPublished - Oct 2020
EventOptoelectronic Devices and Integration IX 2020 - Virtual, Online, China
Duration: 12 Oct 202016 Oct 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11547
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptoelectronic Devices and Integration IX 2020
Country/TerritoryChina
CityVirtual, Online
Period12/10/2016/10/20

Keywords

  • activity monitoring
  • optical fiber sensors
  • smart cushion
  • vital signs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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