Patent ID: 6204755
Filing Date: 2001-03-20
Classification: G01S,G06K

Abstract:
An object detecting device for detecting an object in an object detecting area by transmitting an electromagnetic wave and receiving a reflected wave resulting from the reflection of said electromagnetic wave by the object, comprising a transmitting and receiving means for transmitting the electromagnetic wave and receiving the reflected wave in each of a plurality of small areas into which the object detecting area has been divided, a first storing means for storing signals indicative of reception levels of the reflected waves from the small areas in accordance with the time lag from the transmission to the reception of the waves, a second storing means for storing signals indicative of reception levels of reflected waves in a plurality of detection areas in the form of the received signals added together in accordance with the time lag from the transmission to the reception of the waves, said detection areas being defined by grouping adjacent ones of said plurality of small areas so as to have a predetermined lateral width, and an object detecting means for detecting a distance to the object, based on the result of comparison of an output from said first storing means with an output from said second storing means.