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. 2020 Feb 15;16(2):309–318. doi: 10.5664/jcsm.8190

Figure 3. Accuracy validation of torso posture measurement device.

Figure 3

(A) Measured rotation angle very closely replicates actual rotation angle. Actual rotation angle is measured by a THORLABS PR01 manual goniometer mounted to a wooden rig. Error bars show standard deviation of ten repeated experiments. (B) Absolute error of rotation angle. Error is associated with rotation angle due to imperfect alignment of sensor axes with gravity. Error bars show standard deviation of ten repeated experiments.