Design of a novel flexible capacitive sensing mattress for monitoring sleeping respiratory

Wen Ying Chang, Chien Chun Huang, Chi Chun Chen, Chih Cheng Chang, Chin Lung Yang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this paper, an algorithm to extract respiration signals using a flexible projected capacitive sensing mattress (FPCSM) designed for personal health assessment is proposed. Unlike the interfaces of conventional measurement systems for poly-somnography (PSG) and other alternative contemporary systems, the proposed FPCSM uses projected capacitive sensing capability that is not worn or attached to the body. The FPCSM is composed of a multi-electrode sensor array that can not only observe gestures and motion behaviors, but also enables the FPCSM to function as a respiration monitor during sleep using the proposed approach. To improve long-term monitoring when body movement is possible, the FPCSM enables the selection of data from the sensing array, and the FPCSM methodology selects the electrodes with the optimal signals after the application of a channel reduction algorithm that counts the reversals in the capacitive sensing signals as a quality indicator. The simple algorithm is implemented in the time domain. The FPCSM system is used in experimental tests and is simultaneously compared with a commercial PSG system for verification. Multiple synchronous measurements are performed from different locations of body contact, and parallel data sets are collected. The experimental comparison yields a correlation coefficient of 0.88 between FPCSM and PSG, demonstrating the feasibility of the system design.

Original languageEnglish
Pages (from-to)22021-22038
Number of pages18
JournalSensors (Switzerland)
Volume14
Issue number11
DOIs
Publication statusPublished - Nov 20 2014

Keywords

  • Body movement
  • Flexible projected capacitive sensing mattress
  • Respiration detection

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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