Wheel-load sensor with piezo-electric pickup and method of manuf

Details Wheel-load sensor with piezo-electric pickup and method of manuf Wheel-load sensor with piezo-electric pickup and method of manuf

1994-09-30

1996-11-05

Chilcot, Richard

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

73786, G01M 500

Patent

active

055719619

ABSTRACT:
A wheel-load sensor cast into a mass of material for positioning in a depression in a pavement or the like. The sensor includes a piezo-electric pickup. The pickup encloses an inner electrode and is enclosed in at least one outer electrode. The inner electrode is a solid conductor and the outer electrode a hollow conductor. The pickup can be positioned in the pavement. Some sections (16) of the wall of the piezo-electric pickup (11) more or less parallel the surface of the road. These sections are accommodated subject to a prescribed pressure between the adjacent sections of the wall of the hollow conductor (13') that constitutes the outer electrode and the other sections (16') of the wall of the piezo-electric pickup in the hollow conductor and away from the rest of the walls.

REFERENCES:
patent: 4712423 (1987-12-01), Siffert et al.
patent: 4799381 (1989-01-01), Tromp
patent: 4958306 (1990-09-01), Powell et al.
patent: 5056354 (1991-10-01), Kuwana et al.
patent: 5448232 (1995-09-01), Tyburski
patent: 5463385 (1995-10-01), Tyburski

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