Load cell weighing apparatus

Details Load cell weighing apparatus Load cell weighing apparatus

1989-09-11

1991-01-01

Miller, Jr., George H.

Weighing scales

Preset

177211, 7386267, G01G 2314, G01G 314, G01L 122

Patent

active

049811878

ABSTRACT:
A load cell weighing apparatus comprising a load cell for generating an output voltage corresponding to load weight, an amplifier section for amplifying the output voltage of the load cell, an analog/digital converter for periodically converting the output voltage of the amplifier section to digital data, a processing unit for converting the digital data to weight data based on the amplification factor of the amplifier section and producing display data representing the weight data on a scale of a corresponding weighing range, and a display for displaying the display data supplied from the processing unit. In the load cell weighing apparatus, the amplifier section includes first and second amplifiers connected in tandem, and the processing unit includes a processing circuit for electrically reducing the number of stages of the amplifiers when the digital data input from the analog/digital converter exceeds a predetermined value corresponding to the weight at which the weighing range is switched from a light weight range to a heavy weight range.

REFERENCES:
patent: 4660667 (1987-04-01), Uchimura et al.
patent: 4696359 (1987-09-01), Glibbery
patent: 4706767 (1987-11-01), Chou
patent: 4778016 (1988-10-01), Uchimura et al.
patent: 4842085 (1989-06-01), Lang

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