G - Physics – 05 – D
Patent
G - Physics
05
D
341/38.5
G05D 7/06 (2006.01) A01M 7/00 (2006.01) B05B 9/06 (2006.01)
Patent
CA 1095610
LIQUID SPREADER CONTROL SYSTEM Abstract of the Disclosure An automatic control system for use with a vehicular liquid sprayer of the type which pumps the liquid to be sprayed at a desired pressure to a plurality of nozzles which dispense the liquid at a predetermined desired density relative to the area being sprayed, with the density being a function of a plurality of liquid spraying parameters which may vary from one spraying application to another or from time to time during a given spraying application. A pressure transducer senses the pressure of the liquid supplied to the nozzles and develops a corresponding electrical liquid pressure signal. A ground speed sensor measures the speed of the vehicular sprayer and develops a corresponding electrical ground speed signal. Programming means are coupled to the ground speed sensor for selectively modifying the ground speed signal to obtain a modified ground speed signal having a characteristic which corresponds to the values of at least two of the liquid spraying parameters required to obtain the desired density. A difference amplifier is responsive to the liquid pressure signal and the modified ground speed signal for generating a corresponding valve control signal. A control valve is operatively coupled to the nozzles and is responsive to the valve control signal for adjusting the rate of flow of the liquid to the nozzles to maintain the pressure of the liquid -1- at the nozzles at a level which corresponds to the selected values of the liquid spraying parameters to thus spray the liquid at the desired density. -1a-
281082
Dickey-John Corporation
Smart & Biggar
LandOfFree
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