Method and apparatus for measuring the speed of vehicles

Details Method and apparatus for measuring the speed of vehicles Method and apparatus for measuring the speed of vehicles

1982-01-12

1983-09-27

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

324166, G01P 350

Patent

active

044061650

ABSTRACT:
An apparatus according to the invention includes a vibration sensor put near a traffic lane and for forming an analog signal the frequency values of which are stored when the analog signal is equal to a reference value. The speed is computed from the two stored values.

REFERENCES:
patent: 3594755 (1971-07-01), Pijls
patent: 4126045 (1978-11-01), Chou
"Bispectral Passive Velocimeter of a Moving Noisy Machine", by Sato et al from J. Acoustical Soc. of America, Dec. 1980, pp. 1729-1735.

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