Force sensor systems especially for determining dynamically the

Details Force sensor systems especially for determining dynamically the Force sensor systems especially for determining dynamically the

1992-12-23

1993-11-30

Woodiel, Donald O.

Measuring and testing

Dynamometers

Responsive to force

340666, 340933, 177210C, G01L 116

Patent

active

052654818

ABSTRACT:
The invention comprises a force measuring system for the dynamic determination especially of axle loads, speed, vehicle wheelbase and gross weight. The force measuring system is laid permanently in the roadway. It is of modular assembly, consisting of the amplifier (11), sensor (12) and terminal module (13). The individual modules may be coupled tightly by plug-and-socket connections, welding flanges or glued flanges. The sensor module (12) consists of a hollow section (1), in which piezo-elements (4) are fitted under elastic preload. The piezo-elements (4) are accommodated in the hollow section (1) at intervals of typically 5 to 10 cm, and they may be connected all together with only one electrically conductive foil (5) to the signal processing facility (19), or groupwise or even singly. According to this subdivision the road width can be sectioned as desired, in order to obtain a road loading diagram for instance. The hollow section is designed so that it can be opened elastically by lateral clamping, to allow mechanically interconnected piezo-elements (4) to be inserted. After releasing this clamping, the piezo-elements (4) are under high elastic preload. In this way any tolerance errors can be overcome, so that costly machining operations are unnecessary and all parts with standard tolerances can be used.

REFERENCES:
patent: 3940974 (1976-03-01), Taylor
patent: 4356423 (1982-10-01), Gudzin
patent: 4793429 (1988-12-01), Bratton et al.
patent: 5002141 (1991-03-01), Lashbough et al.

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