Cleaning and liquid contact with solids – Apparatus – Automatic controls
Patent
1996-12-23
1998-10-13
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
Automatic controls
134 58R, 134147, 134155, 134169R, 134186, B08B 304
Patent
active
058197702
ABSTRACT:
A fuzzy logic based control method adjusts the pump speed of a cleaning apparatus in which tubes or other article are located in a tank of cleaning solution. The tank has a circulation system with a discharge header for directing the cleaning solution at the tubes and a suction header for pulling fluid from the tank. The circulation system has a variable speed pump for circulating the fluid. A funnel directs the flow from the tubes towards the suction header. A fuzzy logic controller is used to determine when the pump speed may be stablized at a cleaning speed creating the proper flow of a cleaning solution through the tubes. The fuzzy logic controller utilizes a novel algorithm to determine the proper pump speed which uses fuzzy input variables for the input flow, the output flow, and the amplitude of the difference. In terms of the fuzzy lingistic variables, the input flow, the output flow, and the amplitude, the fuzzy rule for determining the proper pump speed may be expressed as "if input flow is right, output flow is right, and amplitude of the difference is small, then the pump is running at the proper speed" and the cleaning cycle can proceed.
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Randall Frederick
Raven, III Alfred J.
Coe Philip R.
Randall Manufacturing Co.
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