Apparatus and method for classifying vehicles using electromagnetic waves and pattern recognition
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United States of America Patent
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May 12, 1998
Grant Date -
N/A
app pub date -
Feb 26, 1996
filing date -
Feb 28, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
Apparatus and a method for classifying objects moving in a defined range 18 within an operational region is disclosed and claimed. The apparatus finds particular application as a vehicle counter 10. The apparatus is mounted adjacent a road 18 and utilizes a distance-finder 12 to obtain a sequence of distance data relating to a vehicle passing on the road. The distance data and time data are utilised by a signal generator 34 to generate on two-dimensional pattern, wherein one dimension is time and the other is distance, representing the vehicle in the range. A filter filters out data relating to objects falling outside the range, thereby to limit unwanted noise. A neural net 38 classifies the pattern according to one of a plurality of classes, including direction of travel. Counter 40 is used to count vehicles classified as moving in direction A or direction B.
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