Liquid and powder measuring apparatus

Details Liquid and powder measuring apparatus Liquid and powder measuring apparatus

1988-08-22

1990-12-11

Skaggs, H. Grant

Dispensing

Automatic control

Constant weight, volume or pressure control by output

222 56, 222 63, 222 29, 251122, 1374875, B67O 508

Patent

active

049763776

ABSTRACT:
A liquid or powder measurement apparatus, usable also for mixing a plurality of measured materials and for distributing the mixture to a plurality of dispensing containers. A flow control valve having a wide flow rate range and excellent linearity between the degree of valve opening and flow rate is disposed in each of the liquid flow paths and is adjustable to have a flow rate linearly varying with the stroke of the valve. A mixing container receives the raw material from one or more supply containers and is weighed by a load cell to thereby detect the amount of material flowing into or out of the mixing container. A control unit operating according to fuzzy logic compares the measured weight with a target weight and accordingly adjusts the flow rate of a selected one of the flow regulators. The same load cell and control unit can also control the flows from the mixing containers to the dispensing containers.

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