The method involves monitoring at least one region (20) of the vehicle's (10) surroundings with at least one sensor (18), which generates an activation signal if a person or an object enters the monitored region and transmits it to the electronic circuit a...

A sensor for detecting a specific object (such as a hand) excellent in operation reliability and response, further excellent in mountability (dominance such as in size and design) on a vehicle, and much less in power consumption than conventional impulse r...

In an electronic key system for a motorcycle including the control unit (14) mounted on the specific vehicle (100A) and a mobile transmitter-receiver (12) that the user carries, the specific vehicle (100A) includes an openable and closable seat (108) on wh...

The receiver is tuned for receiving a number of different reception frequencies, with information relating to the identity of the transmitter for each frequency entered in a memory during a stand-by mode, before the receiver is switched to the operating mo...

A security system is disclosed which is suitable for use in a passive entry and passive starting arrangement for a vehicle 10. A set of transmitters in the form of coils A, B, C are spaced around the vehicle 10, one A, B in each door mirror 20R, 20L and on...

In a human body detector, a wave-detection circuit (35) for detecting waves of a resonance voltage (V1) is connected to a sensor resonance circuit (35) that varies a constant frequency voltage in accordance with a change in the capacitance of a sensor elec...

The switching device comprises a capacitive sensor (1) connected to an electronic processing circuit comprising the following stages: (A) an oscillator-converter of the variations of capacitance into the variations of frequency, (B) a frequency-voltage con...