Table 3.

Comparison between sensors for joint angle measurement.

	Low-Cost	Portable	No Calibration Required	Good Repeatability	No Electromagnetic Interferences	No Reference System
Vargas-Valencia et al. [22]	✓	✓		✓		✓
Arnaldo et al. [12]	✓	✓		✓	✓
Umesh et al. [5]				✓	✓
OptiTrack [23]			✓	✓	✓
EMGSystem [24]		✓		✓	✓	✓
Biometrics [25]		✓	✓		✓	✓
Proposed sensor	✓	✓	✓	✓	✓	✓