US Patent No: 5,428,527
Number of patents in Portfolio can not be more than 2000
Method and device for the consideration of varying volume and flow in the control of a continuous flow process
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Jun 27, 1995
Issued date -
Aug 25, 1992
filing date -
07/920,436
serial no -
In Force
status
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Abstract
The control method is directed to a quality characteristic of the process material, typically to its outlet concentration. In control of the actuator which is a part of feedforward or feedback control of outlet concentration, one takes account of changes of the material volume and flow, in addition to the inlet concentration or control deviation. With this object, at least two of the quantities of inlet flow, outlet flow and material volume are measured or determined and by means of them a variable is further determined with regard to which the control method is invariant. Two alternative variables are presented, one being typically applicable to control of a process with finite distribution of the flow velocity and the other to control of a process with vigorous mixing. By means of a time-variable control method, the controls can also be implemented with time as the independent variable. The invention also relates to devices which implement the control methods presented.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,808,161 Pressure-measurement flow control system | 144 | 1987 | |
| 4,826,482 Enhanced pressure measurement flow control system | 109 | 1987 | |
| 5,193,990 Fluid management system with auxiliary dispensing chamber | 57 | 1991 | |
| 5,349,852 Pump controller using acoustic spectral analysis | 65 | 1991 | |
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| 4,385,992 Water softener control | 17 | 1981 | |
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| 5,161,100 Closed loop proportional-integral fluid flow controller and method | 6 | 1990 | |
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| 4,592,743 Apparatus for mixing liquids | 9 | 1985 | |
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| 4,854,713 Impingement mixing device with pressure controlled nozzle adjustment | 15 | 1987 | |
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| 5,032,154 Flue gas conditioning system | 33 | 1990 | |
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| 4,999,117 Monitoring method for wastewater pump station and compatible apparatus | 7 | 1989 | |
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| 4,380,317 Furnace control | 3 | 1982 | |
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| 5,122,162 Control system for flue gas conditioning | 10 | 1990 | |
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| 4,358,821 Method and apparatus for the incorporation of varying flow in the control of process quantities | 9 | 1980 | |
| 4,560,323 Apparatus for controlling the flow of a fluid | 11 | 1982 | |
| 5,133,280 Liquid flow control device in bowling lane maintenance system | 16 | 1990 | |