Doppler-radar based automatic vehicle-classification system

Details Doppler-radar based automatic vehicle-classification system Doppler-radar based automatic vehicle-classification system

1995-03-20

1998-02-10

Hofsass, Jeffrey

Communications: electrical

Vehicle detectors

340937, 235379, 235380, 235384, 342 44, 342 51, 364436, G08G 101

Patent

active

057173907

ABSTRACT:
A method for automatically categorizing the general variety of motor-vehicle types moving through a given checkpoint, according to their predominant characteristics; basically involving features such as length, height, axle count, existence of a trailer, and specific envelop contour (i.e.--motorcycle, car, truck, bus, limousine, etc.). Advantageously employing Doppler-based CW-radar for ultimate real-time accuracy, resolving even closely spaced vehicles having differing acceleration/deceleration rates; the system will establish a vehicle's classification during stop-and-go or at speed. Real-time velocity information is read from successively radar targeted vehicles, while combined with real-time information acquired via at least one special electronic profiling-window apparatus employing beam emitters/receptors or lasers in making incremental transverse-slice readings of traversing vehicles. Readings are assembled by data-processor into a longitudinal dot-matrix pattern, and compared to pre-established vehicle profiles, for segregation into particular vehicle-classification types for toll-charge auditing.

REFERENCES:
patent: 3750171 (1973-07-01), Faris
patent: 3846820 (1974-11-01), Lampe
patent: 4117481 (1978-09-01), Constant
patent: 5087918 (1992-02-01), May
patent: 5101200 (1992-03-01), Swett
patent: 5278563 (1994-01-01), Spiess
--Applicant's P.T.O./Disclosure Document #358,610 Filed: Jul. 29,1994.

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