Seismic apparatus for discrimination between track-type vehicles

Details Seismic apparatus for discrimination between track-type vehicles Seismic apparatus for discrimination between track-type vehicles

1961-06-19

1979-06-19

Moskowitz, Nelson

Communications: electrical

Selective

Having indication or alarm

340 15, 340 38R, 340566, G08G 100

Patent

active

041588320

ABSTRACT:
10. A vehicle identifying circuit comprising: means for detecting seismic brations created by passing vehicles and converting them into electrical impulses; frequency-sensing circuit means coupled to said detecting means for producing electrical signals in accordance with the frequency characteristics of said impulses, said frequency-sensing circuit means comprising an amplifier, a clipper circuit, a differentiator circuit, a rectifier and an integrator coupled in sequence to produce said electrical signals; and vehicle discriminating circuit means coupled to said frequency-sensing means to convert said signals into output pulses having voltage levels indicative of the character of the suspension system of the passing vehicle.

REFERENCES:
patent: 2679746 (1954-06-01), De Boisblanc
patent: 2820361 (1958-01-01), Apps
patent: 2942247 (1960-06-01), Lienau et al.
patent: 3049699 (1962-08-01), Larrick et al.
patent: 3109165 (1963-10-01), Bagno
patent: 3111186 (1963-11-01), Schroeder

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