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.

Abstract: This device (4) allows the detection of the presence of an object in a detection zone by measuring a variation in capacitance brought about by the presence of the object. It includes an element (6) for emitting an electric field, an element (8) for receiving an electric field, and elements for measuring the coupling capacitance between the emission element (6) and the reception element (8), the emission element (6) emitting an electrical signal received by the reception element (8) so that a coupling capacitance of a predetermined value is established between the emission element (6) and the reception element (8) when no object is present in the detection zone, a variation in the coupling capacitance indicating the displacement of an object in the detection zone and the establishment of a capacitance of a different value from the predetermined value indicating the presence of a static object.

Abstract: A detection device for detecting an object by measuring the capacitance variation of the detection device includes at least a pair of sensor pads, each sensor pad being able to transmit or to receive an electric field. Each sensor pad can be used to measure the impedance variation of the pad, each sensor pad being driven by a driven rail impedance measuring system including an inverter, an oscillator, a power supply rail driver and switches, the measuring system being able to change the sensor pad function from electric field transmitter to electric field receiver or impedance measurer by turning on and off the oscillator to the input of the power supply rail driver of the inverter.

Abstract: A detection device for detecting an object by measuring the capacitance variation of the detection device includes at least a pair of sensor pads, each sensor pad being able to transmit or to receive an electric field. Each sensor pad can be used to measure the impedance variation of the pad, each sensor pad being driven by a driven rail impedance measuring system including an inverter, an oscillator, a power supply rail driver and switches, the measuring system being able to change the sensor pad function from electric field transmitter to electric field receiver or impedance measurer by turning on and off the oscillator to the input of the power supply rail driver of the inverter.

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 pa.

Abstract: This device (4) allows the detection of the presence of an object in a detection zone by measuring a variation in capacitance brought about by the presence of the object. It includes an element (6) for emitting an electric field, an element (8) for receiving an electric field, and elements for measuring the coupling capacitance between the emission element (6) and the reception element (8), the emission element (6) emitting an electrical signal received by the reception element (8) so that a coupling capacitance of a predetermined value is established between the emission element (6) and the reception element (8) when no object is present in the detection zone, a variation in the coupling capacitance indicating the displacement of an object in the detection zone and the establishment of a capacitance of a different value from the predetermined value indicating the presence of a static object.