Device for detecting data relating to the passage of vehicles on

Details Device for detecting data relating to the passage of vehicles on Device for detecting data relating to the passage of vehicles on

1991-04-30

1993-04-27

Ng, Jin F.

Communications: electrical

Vehicle detectors

174110A, 174118, 340941, G08G 101

Patent

active

052066428

ABSTRACT:
A device for detecting data relating to the passage of vehicles on the road including a piezoelectric effect cable and a cylindrical metal tube having an inside diameter which is larger than the outside diameter of the piezoelectric cable with the space between the cable and inner walls of the tube being filled with a compacted metal oxide power.

REFERENCES:
patent: 2785218 (1957-03-01), Kirch
patent: 3789130 (1974-01-01), Parker
patent: 4943805 (1990-07-01), Dennison
patent: 5008666 (1991-04-01), Gebert et al.
P. Coville, Cables piezo-electriques: de nombreuses possibilites en mesure, Mar. 15, 1982, pp. 73-75.
Harry L. Trietley, Need a T/C or RTD in a hurry?, I&CS-The Industrial and Process Control Magazine, Jul. 1983, pp. 43-44.

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