G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 15/88 (2006.01) B60Q 1/52 (2006.01) B60Q 9/00 (2006.01) G01S 15/93 (2006.01) G01S 7/52 (2006.01) G01S 15/04 (2006.01) G01S 15/87 (2006.01)
Patent
CA 2201080
This invention relates to a new and useful system and method of ultrasonic detection for use in the monitoring of the danger zone of a vehicle when stationary. The system comprises one or more sensors, circuit means for analog to digital signal conversion of acoustic echoes from the sensors and a microsequencer programmed to control the sensors. The microsequencer receives a sequence of digitized acoustic echoes from the sensors, generates from the digitized acoustic echoes one initial reference data set representing a pattern of distances, establishes and stores the initial reference data set defining what is present in the danger zone at the time said vehicle becomes stationary, monitors a subsequent sequence of digitized acoustic echoes received from the sensors, generates from the subsequent sequence of digitized acoustic echoes a second data set representing a pattern of distances, establishes the second data set and compares the second data set with the initial reference data set and returns an alarm output if a variation greater than a predetermined value between the initial reference data set and the second data set is detected.
As Represented By The Ministe R. Of Industry Her Majesty The Queen In Right Of Canada
Freedman Gordon
LandOfFree
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