| 摘要 |
The invention concerns a detection set comprising in combination a sensor (100) comprising three electrodes: two main electrodes (110, 120) covering different zones of the space and the third auxiliary electrode (130), surrounding almost entirely the two main electrodes (110, 120) and processing means (200) connected to said electrodes(110, 120, 130) to power same through controlled voltage levels, operate the signals sampled therefrom as ratios between two signals and deliver partly binary data representing the overlap or non-overlap of one main electrode (110, 120) by comparing the signal sampled thereon with a predetermined threshold and partly analog data representing the percentage of overlap of at least one electrode. |
