Device for detecting obstacle located backward of automobile

Details Device for detecting obstacle located backward of automobile Device for detecting obstacle located backward of automobile

2007-06-26

2007-06-26

Mullen, Thomas (Department: 2612)

Communications: electrical

Land vehicle alarms or indicators

Of relative distance from an obstacle

C367S093000

Reexamination Certificate

active

11100606

ABSTRACT:
A device for detecting an obstacle located backward of a vehicle is mounted on a vehicle such as a pickup truck having a rear loading space and a tailgate for closing the loading space. Ultrasonic waves are transmitted backward, and the backward obstacle is detected by receiving ultrasonic waves reflected by the backward obstacle. When the tailgate is open or the load extends backward from the open tailgate, the transmitted waves are reflected by the open tailgate or the extending load. This may cause erroneous detection of the backward obstacle. To avoid the erroneous detection, detection of the reflected waves from the backward obstacle is delayed by a predetermined period when the tailgate is open or the load extends backward.

REFERENCES:
patent: 6676186 (2004-01-01), Greif
patent: 6879914 (2005-04-01), Hoenes et al.
patent: 2003/0052969 (2003-03-01), Satoh et al.
patent: A-2002-323560 (2002-11-01), None
patent: A-2002372585 (2002-12-01), None

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