Design of a Novel Flexible Capacitive Sensing Mattress for Monitoring Sleeping RespiratoryReport as inadecuate




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1

Department of Electrical Engineering, National Cheng-Kung University, Tainan 701, Taiwan

2

Biomedical Electronics Translational Research Center, National Chiao Tung University, Hsinchu 300, Taiwan

3

Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei 235, Taiwan





*

Authors to whom correspondence should be addressed.



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. View Full-Text

Keywords: body movement; respiration detection; flexible projected capacitive sensing mattress body movement; respiration detection; flexible projected capacitive sensing mattress





Author: Wen-Ying Chang 1, Chien-Chun Huang 2,* , Chi-Chun Chen 1, Chih-Cheng Chang 3 and Chin-Lung Yang 1,*

Source: http://mdpi.com/



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