System and method of vehicle detection

Details System and method of vehicle detection System and method of vehicle detection

1990-08-13

1992-12-22

Ng, Jin F.

Communications: electrical

Vehicle detectors

Sonic or ultrasonic

3409322, 340917, G08G 104

Patent

active

051736926

ABSTRACT:
A method for detecting vehicles includes two ultrasonic overhead detectors arranged along a lane or path of travel of a car through an access gate or entrance. The detectors measure the heights of the hood, roof and trunk of the car as it moves past the detectors. Software is used to compare the measured quantities with pre-established vehicle profiles. The method, and the associated hardware and software, can be used to count vehicles, classify vehicles as well as operate peripheral devices such as traffic lights, gates and the like.

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patent: 3315065 (1967-04-01), Auer, Jr.
patent: 3317892 (1967-05-01), Schwarz
patent: 4187487 (1980-02-01), Numata et al.
patent: 4674069 (1987-06-01), Mizuno
patent: 4789941 (1988-12-01), Nunberg
patent: 5029094 (1991-07-01), Wong

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