Passenger detection system and method

Details Passenger detection system and method Passenger detection system and method

B - Operations, Transporting

60

R

B60R 21/015 (2006.01) B60R 21/01 (2006.01)

Patent

CA 2351806

A passenger detection system is provided. The passenger detection system utilizes an oscillation circuit (10) that causes an antenna electrode (E1) to emit an electric field that is disrupted by the electrical characteristics of an object placed on the seat (1). This disruption alters the current and phase of the signal in the antenna electrode (E1). By comparing the current flowing in the antenna electrode (E1) and the difference between the phase of the signal in the antenna electrode (E1) and the oscillation circuit (10) output signal with predetermined threshold values, it is possible to detect the presence of a passenger in a reliable and inexpensive manner.

L'invention concerne un système de détection de passagers. Ce système de détection de passager utilise un circuit d'oscillation (10) qui provoque l'émission d'un champ électrique par une électrode d'antenne (E1), ce champ étant interrompu par les caractéristiques électriques d'un objet placé sur le siège (1). Cette interruption modifie le courant et la phase du signal dans l'électrode d'antenne (E1). La comparaison du courant circulant dans l'électrode (E1) et/ou la différence entre la phase du signal dans cette électrode (E1) et le signal de sortie du circuit d'oscillation (10) avec des valeurs seuils prédéterminées permet de détecter la présence d'un passager avec fiabilité et à peu de frais.

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