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Ryoichi Miyauchi
University of Miyazak
Computer Science & IT Electrical & Electronics Engineering

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Simple Measurement System for Biological Signal Using a Smartphone Ryoichi Miyauchi; Koichi Tanno; Hiroki Tamura
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.397 KB) | DOI: 10.11591/ijece.v8i6.pp4157-4163

Abstract

This paper describes simple measurement system for biological signal using smartphone. The proposed system consists of an instrumentation amplifier, a filter and an AC/DC converter. The biological signal is converted to the digital data through the microphone terminal with A/D converter in the smartphone. In many cases, the circuits require the power sources such as the cell batteries, however, the proposed system is supplied the power through the earphone terminal of the smartphone. Therefore, the proposed system no require the batteries. The software of this system parallelizes the processing so that the earphone output and the microphone terminal can be executed at the same time. The proposed system was verified through the measurement of surface electromyogram using discrete parts and iOS. Results of experimentation, the proposed system was operating correctly.
Co-Authors Hiroki Tamura Koichi Tanno