Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 22, 2008
Patent Application Number
11227171
Date Filed
September 16, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
An obstacle detection apparatus detects an obstacle to a vehicle by a sensor section including a transmitter which transmits a wave to a predetermined detection area, and a receiver which receives an echo of the wave reflected by the obstacle. The obstacle detection apparatus measures a distance to the obstacle from the output of the sensor section. A detection-distance change circuit changes predetermined detection distances in the maximum detection distance. Alarm means gives an alarm step by step in accordance with the detection distances.
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