Weight or force measuring apparatus

Details Weight or force measuring apparatus Weight or force measuring apparatus

1981-12-08

1983-12-06

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

177184, 177DIG6, G01G 314, G01G 2110

Patent

active

044187742

ABSTRACT:
This apparatus is for use in measuring a weight, or force, and it is particularly useful as a scale. The apparatus includes a single vibrating wire and wire supports that rigidly clamp the two ends of the wire. A weight to be measured is applied to the wire in substantially the direction of its length, and the applied weight changes the tension in the wire. The apparatus includes a wire drive circuit that causes the wire to vibrate at essentially its natural resonant frequency. The frequency varies as a known cubic equation with respect to the applied weight, and a computer, operating in accordance with the equation, converts the measured frequency to a weight signal. The apparatus further includes vibration dampers and isolators for reducing the effects of sympathetic vibrations and of externally induced vibrations, and means to correct for external influences such as disturbing frequencies and ambient temperature.

REFERENCES:
patent: 3712395 (1973-01-01), Streater et al.
patent: 3850257 (1974-11-01), Teraoka
patent: 4070900 (1978-01-01), Engels
patent: 4184555 (1980-01-01), Maltby et al.

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