Electronic weight measuring device

Details Electronic weight measuring device Electronic weight measuring device

1978-04-18

1979-06-19

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

177DIG3, 177210FP, G01G 314

Patent

active

041583965

ABSTRACT:
An electronic weight measuring device comprises a load cell to produce a voltage signal corresponding to the weight of load applied, an amplifier circuit for amplifying the output signal of the load cell, an A/D converter circuit for converting the output signal of the amplifier circuit into a digital signal, a counter for counting the number of clock pulses corresponding to the output signal of the A/D converter circuit, a microcomputer for deriving a weight indicating signal from the count output signal of the counter, and a display unit for displaying the weight indicating signal from the microcomputer.
The electronic weight measuring device further includes a bias circuit to apply a bias voltage to the amplifier circuit so as to reduce to a zero level the output signal produced from the amplifier circuit when it has received from the load cell an output signal corresponding to 1/2 of the rated weight, and the A/D converter circuit produces a digital output signal corresponding to the absolute value of a positive or negative output signal from the amplifier circuit.

REFERENCES:
patent: 3831687 (1974-08-01), Maffia et al.
patent: 3872936 (1975-03-01), Baumann et al.
patent: 4044846 (1977-08-01), Matilainen
patent: 4063604 (1977-12-01), Rock

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