All the experiments and measures have been obtained by sampling the curve and keeping aligned the time code for measuring the data coming from the internal sensors with respect the position of the person passing by the marked points. The measures have been recorded with a TV camera to allow review and verification according to the time code. Due to the high number of samples taken for the measures, and the time code in ms, the error of measure was smaller than 2 cm. Therefore, proposed solutions are better ranked with respect to the state of the art solutions