Driver's doze alarming apparatus using closed pneumatic...

B - Operations – Transporting – 60 – K

Patent

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Details

B60K 28/06 (2006.01) A61B 5/11 (2006.01) A61B 5/18 (2006.01) B60N 2/00 (2006.01) G08B 21/06 (2006.01)

Patent

CA 2422818

A closed pneumatic sound sensor is incorporated in a driver's seat and catches a signal representative of a movement of the body of the driver, and a continuation time period within which the level of the signal does not reach a fixed level is detected. Simultaneously, a signal which is generated only when the vehicle is running is caught from the vehicle, and the two signals are compared with each other by an arithmetic operation circuit. Only when both of the signals are present and a particular tendency appears in the continuation time period of the signal representative of a movement of the body, an alarm is generated. A less expensive doze-at-the-wheel alarming apparatus which does not require cumbersome mounting and does not operate when the vehicle is not running is provided. 20

On fixe au siège du conducteur un détecteur de bruissement d'air occlus de manière à capter un signal représentatif du mouvement du corps du conducteur et de la durée pendant laquelle le signal n'atteint pas un niveau prédéterminé. Simultanément, on capte un signal produit lorsque le véhicule est en mouvement, puis on compare les deux signaux à l'aide d'un circuit ad hoc. Si les deux signaux sont présents, et uniquement si une tendance spécifique apparaît dans la durée du signal représentatif du mouvement du corps, une alarme se déclenche. C'est donc un moyen économique et facile à monter d'alarme d'endormissement ne fonctionnant que quand le véhicule est en mouvement.

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