Chemistry: analytical and immunological testing – Automated chemical analysis – Condition or time responsive
Patent
1997-09-18
1999-05-11
Le, Long V.
Chemistry: analytical and immunological testing
Automated chemical analysis
Condition or time responsive
436 43, 436 52, 436 55, 436 56, 436172, 436179, 436180, 422 67, 422 81, 422 8208, 422105, 422110, 422119, G01N35/08
Patent
active
059027495
ABSTRACT:
A chemical metering and control system is provided which maintains a desired level of a pesticide (or other chemical) in any open or closed channel flow stream with fluctuating flow rates. The system dispenses an amount of the pesticide at an injection point of the flow stream along with a fluorescent indicating dye, and then takes a sample downstream from the injection point to determine how much of the indicating dye is present in the flow stream, and therefore how much pesticide is present. At the sampling point a pump extracts a flow stream sample and passes the sample to a fluorometer which measures the amount of fluorescent indicating dye injected upstream. A proportional integral derivative (PID) controller then adjusts the level of the pesticide/dye mixture in order to achieve the appropriate concentration of pesticide in the flow stream.
REFERENCES:
patent: 3704952 (1972-12-01), Bird
patent: 3980435 (1976-09-01), Wimberley
patent: 3992109 (1976-11-01), Bock
patent: 4783314 (1988-11-01), Hoots et al.
patent: 5004696 (1991-04-01), Clinkenbeard
patent: 5006311 (1991-04-01), Hoots et al.
patent: 5171450 (1992-12-01), Hoots
patent: 5266493 (1993-11-01), Young
patent: 5413719 (1995-05-01), Sivakumar et al.
patent: 5435969 (1995-07-01), Hoots et al.
patent: 5565619 (1996-10-01), Thungstrom et al.
patent: 5705394 (1998-01-01), Ananthasubramanian et al.
Lichtwardt Mark Allen
Sisneros David
Koltos E. Philip
Le Long V.
The United States of America as represented by the Secretary of
LandOfFree
Automated chemical metering system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automated chemical metering system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automated chemical metering system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-245380