Electronic balance

Details Electronic balance Electronic balance

1991-02-27

1993-02-09

Miller, Jr., George H.

Weighing scales

Self-positioning

Repositioning in response to deflection under load

177210EM, G01G 700

Patent

active

051846900

ABSTRACT:
In a PID-controlled electronic balance consisting essentially of a weighing pan, a pan stopper for defining the lowest position of the weighing pan, a displacement detector for detecting the displacement of the weighing pan, a PID operation circuit and an electromagnetic force transducer, the PID operation circuit is devised so as to operate, when the weighing pan has its movement kept restricted by the pan stopper, with at least one of the mathematical coefficients increased, the coefficients respectively multiplying the proportionality term integral term and differential term contained in the mathematical operation process carried out by the PID operation circuit.

REFERENCES:
patent: 3786883 (1974-01-01), Kunz
patent: 4245711 (1981-01-01), Kunz
patent: 4627505 (1986-12-01), Kunz
patent: 4875534 (1989-10-01), Kunz
patent: 5115877 (1992-05-01), Komoto

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