Method and apparatus for detecting dissolution of a solid in a liquid
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United States of America Patent
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Oct 6, 1992
Grant Date -
N/A
app pub date -
Nov 13, 1990
filing date -
Nov 13, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for detecting completion of the dissolution of a soluble solid material in a liquid in a container. The container and its contents are excitated by a wide frequency band excitation signal, causing the container and its contents to respond at a predominant frequency. The frequency response of the container and its contents is successively sampled and measured, and the respective predominant frequency response values are compared with preceding values. As the solid dissolves in the liquid, the predominant response frequency will change. Once the predominant frequency response stabilizes from sample to sample at a particular value, the dissolving process is complete. The detection method and apparatus can be used to control a motorized agitator to prevent overmixing and save energy.
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