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Sensors 2017, 17(11), 2634; doi:10.3390/s17112634

A Human Body Pressure Distribution Imaging System Based on Wavelet Analysis and Resistance Tomography

School of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Author to whom correspondence should be addressed.
Received: 12 September 2017 / Revised: 2 November 2017 / Accepted: 9 November 2017 / Published: 15 November 2017
(This article belongs to the Special Issue Biosensing for Interfacial Science)
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In this paper, a pressure distribution sensing system based on wavelet analysis and resistance tomography is proposed to overcome the shortcomings of a traditional electrode type pressure distribution sensor, which needs to be arranged with many electrodes and has a high production cost. The system uses ADS1256, a constant current source module, a serial communication module, a Raspberry host, a touch screen, and other components. The wavelet transform is used to preprocess the collected signal to improve the anti-jamming performance of the system. The method of resistance tomography is used to realize the real-time imaging of pressure distribution. Finally, the reliability of the system is verified using conductive silica gel as a sensitive material. The experimental results show that wavelet analysis preprocessing can significantly improve the quality of pressure distribution imaging. View Full-Text
Keywords: pressure distribution sensor; wavelet analysis; electrical resistance tomography pressure distribution sensor; wavelet analysis; electrical resistance tomography

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, S.; Wang, W.; Guo, W.; Zhang, C. A Human Body Pressure Distribution Imaging System Based on Wavelet Analysis and Resistance Tomography. Sensors 2017, 17, 2634.

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