Page 196 - Biomedical Engineering and Design Handbook Volume 1, Fundamentals
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BIOMECHANICS OF THE MUSCULOSKELETAL SYSTEM 173
A. Raw EMG
1
0.8
0.6
0.4
Normalized amplitude –0.2 0
0.2
–0.4
–0.6
–0.8
–1
0 0.1 0.2 0.3 0.4 0.5 0.6
Time (seconds)
B. Processed EMG
1
0.9
0.8
0.7
Normalized amplitude 0.5
0.6
0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6
Time (seconds)
FIGURE 7.18 A method for processing EMG data for a myoelectric control signal. (a) The raw
EMG data, and (b) the signal after being rectified and low pass filtered (10-Hz cutoff).
