Load cell scale with reference channel for live load correction

Details Load cell scale with reference channel for live load correction Load cell scale with reference channel for live load correction

1987-09-16

1988-06-21

Miller, Jr., George H.

Weighing scales

Computer

Electrical

177185, 177200, G01G 2310, G01G 1900

Patent

active

047519738

ABSTRACT:
Cancellation of noise in the weighing channel output of an electronic scale due to external vibrations is achieved by use of a reference, non-weighing channel in the scale. The reference channel is exposed to the vibrations affecting the weighing channel. The average output, Aavg, of the reference channel is divided by the instantaneous output, A.sub.t, thereof, and the result is multiplied by the instantaneous output, W.sub.t, of the weighing channel to obtain a corrected output, Wavg, indicative of the weight of an article plus tare. Method and Apparatus are disclosed. Analog and Digital embodiments of the apparatus are disclosed.

REFERENCES:
patent: 2767974 (1956-10-01), Ballard et al.
patent: 2767975 (1956-10-01), Horst et al.
patent: 3322222 (1967-05-01), Baur
patent: 4212361 (1980-07-01), Stocker
patent: 4258811 (1981-03-01), Franzon et al.
patent: 4396080 (1983-08-01), Dee
patent: 4553618 (1985-11-01), Kusmenskji et al.
patent: 4624331 (1986-11-01), Naito
patent: 4667297 (1987-05-01), Kawai

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