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. Author manuscript; available in PMC: 2019 Jun 3.
Published in final edited form as: IIE Trans Healthc Syst Eng. 2015 Mar 16;5(1):1–13. doi: 10.1080/19488300.2014.993005

Fig. 2.

Fig. 2

Calibration curves for the two rotation axes of the tilt sensor. The horizontal axis is the digital-to-analog converter output. The vertical axis is the sine of the inclination angle. Diamonds are for x-axis orientation (left and right rotation), squares for the y-axis orientation (forward and backward rotation).