| 摘要 |
A seat occupancy sensor (12) comprises a sensing layer (14) associated to a seating surface of a seat, which has at least one electrical property varying locally in response to a pressure and/or deformation applied to said sensing layer (14). The device further comprises a plurality of electrodes (18) associated to said sensing layer (14) at a periphery of a sensing area, and a control unit (20) connected to said electrodes (18), said control unit (20) comprising means for evaluating a pressure profile acting on said sensing layer (14) by determining said at least one electrical property between pairs of electrodes (18) selected from said plurality of electrodes. <??>The invention also relates to a method for the detection of seat occupancy comprising the steps of: c) determining said at least one electrical property of said sensing layer (14) between pairs of different locations situated at a periphery of a sensing area, and d) evaluating a pressure profile acting on said sensing layer (14) based on the determined electrical property values. <IMAGE> |
