Patent ID: 7570064
Filing Date: 2009-08-04
Classification: A61B,G01B,H03K

Abstract:
1. Proximity detector employing a capacitive sensor, comprising: at least one detection antenna comprising a plurality of capacitive proximity sensors that each includes only a single measurement electrode, said antenna movably approaching an object or a body, electronic means for exciting said measurement electrodes and for processing the signals originating from said capacitive sensors, digital means for controlling the electronic means and for calculating in real time, from the measurement signals thus processed, the absolute distances between said electrodes and said object or said body, wherein said electronic means comprise, for each said detection antenna, a floating capacitive bridge or with floating excitation, cooperating with polling means to measure sequentially the respective capacitances between each of said measurement electrodes of said antenna and the object or body to be measured, and wherein said sensors have a range greater than 100 mm with a resolution of the order of a millimeter.