THERMAL SCIENCE
International Scientific Journal
IMPLEMENTATION OF A REAL-TIME AUTOMATIC ONSET TIME DETECTION FOR SURFACE ELECTROMYOGRAPHY MEASUREMENT SYSTEMS USING NI MYRIO
ABSTRACT
For using surface electromyography (sEMG) in various applications, the process consists of three parts: an onset time detection for detecting the first point of movement signals, a feature extraction for extracting the signal attribution, and a feature classification for classifying the sEMG signals. The first and the most significant part that influences the accuracy of other parts is the onset time detection, particularly for automatic systems. In this paper, an automatic and simple algorithm for the real-time onset time detection is presented. There are two main processes in the proposed algorithm; a smoothing process for reducing the noise of the measured sEMG signals and an automatic threshold calculation process for determining the onset time. The results from the algorithm analysis demonstrate the performance of the proposed algorithm to detect the sEMG onset time in various smoothing-threshold equations. Our findings reveal that using a simple square integral (SSI) as the smoothing-threshold equation with the given sEMG signals gives the best performance for the onset time detection. Additionally, our proposed algorithm is also implemented on a real hardware platform, namely NI myRIO. Using the real-time simulated sEMG data, the experimental results guarantee that the proposed algorithm can properly detect the onset time in the real-time manner.
KEYWORDS
PAPER SUBMITTED: 2015-09-29
PAPER REVISED: 2015-12-04
PAPER ACCEPTED: 2015-12-28
PUBLISHED ONLINE: 2016-02-20
THERMAL SCIENCE YEAR
2016, VOLUME
20, ISSUE
Supplement 2, PAGES [S591 - S602]
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