Patent Number: 8,878,550

Title: Sensor device for detecting an object in a detection area

Abstract: A sensor device is provided. The sensor device includes a sensor pad for detecting an object in a detection area by measuring the impedance variation of the sensor pad, the sensor device further including a back focus plate disposed behind the sensor pad relative to the detection area and a first surrounding focus plate arranged around the sensor pad. The sensor device includes a signal generator that drives the sensor pad and the focus plates with a first set of signals having a predetermined constant phase, frequency and voltage amplitude. The sensor device further comprises at least a second surrounding focus plate arranged around the first surrounding focus plate, the second surrounding focus plate being driven with a second set of signals that are different from the first set of signals feeding the sensor pad.

Inventors: Aubry; Jean-Marcel (Bourogne, FR), Bach; Thomas W (Brighton, GB)

Assignee: Faurecia Bloc Avant

International Classification: G01B 7/14 (20060101); G01R 27/26 (20060101)

Expiration Date: 2019-11-04 0:00:00