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Chemical Flow Rate Control for an Injection Type Sprayer

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Applied Engineering in Agriculture. 5(3): 339-343. (doi: 10.13031/2013.26524) @1989
Authors:   L. Chi, R. L. Kushwaha, F. W. Bigsby
Keywords:   Calibration, Chemigation, Metering pump, Pesticide application

One of the major problem in an injection-type sprayer is measuring and controlling the flow rate of the concentrated chemicals. An electro-mechanical feedback system was designed to control the chemical concentrate flow rate in an injection-type sprayer. The system works well for a fluid with viscosity from 90 to 300 mPa.s and a flow rate from 3 to 20 mL/s (0.1 to 0.68 oz/s). A linear relationship was achieved between the flow rate and metering pump speed. The system also showed a good dynamic performance.

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