Spray control device
AssigneeC-Dax Systems Limited
InventorMichael Henry Aart Oosterman
Life of this patent
Estimating the term…
Abstract
A spray control device for use with vehicle mountable spraying apparatus having a pump for conveying fluid under pressure to a spray head. The control device has a pressure sensor for sensing the pressure of the fluid near the spray head. A speed sensor enables calculation of vehicle speed. An adjustment device adjusts the delivery of fluid to the spray head. A microprocessor is programmed to calculate from information derived from the pressure sensor and speed sensor spray application rate. The microprocessor compares the application rate with a stored target application rate to thereby cause the adjustment device to, if necessary, adjust the pump so that the pressure of fluid delivery achieves the target application rate.
Claims21
A spray control device for use with vehicle mountable spraying apparatus having a pump for conveying fluid under pressure to a spray head, the control device including a pressure sensor for sensing the pressure of the fluid near the spray head, a speed sensor to enable calculation of vehicle speed, an adjustment control for adjusting the delivery of fluid to the spray head and a microprocessor programmed to calculate, from information derived from the pressure sensor and speed sensor, a calculated spray application rate and compare the calculated spray application rate with a stored target application rate to thereby cause the adjustment control to, if necessary, adjust the pump to deliver fluid so that a pressure is achieved such as to achieve the target application rate.
A spray control device, comprising:
- a pump;
- a spray boom;
- a main supply line extending from the pump to the spray boom;
- a pressure sensing tube with an inlet connected to the main supply line at a line adjacent the spray boom;
- a pressure transducer coupled to the pressure sensing tube to sense pressure at the spray boom;
- a microprocessor connected to the pressure transducer;
- and
- a pulse width modulator connected intermediate the microprocessor and the pump, the pulse width modulator controlling the pump based on control signals from the microprocessor, wherein,
- the microprocessor compares the pressure sensed at the spray boom to determine a calculated spray application rate,
- the microprocessor compares the calculated spray application rate to a stored, non-zero spray application rate, and
- the microprocessor directs the pulse width modulator to adjust a speed of the pump to deliver fluid to provide a spray head pressure corresponding to the stored spray application rate.
A spray control device, comprising:
- a pump;
- a spray boom;
- a main supply line extending from the pump to the spray boom;
- a pressure transducer coupled to sense pressure at the spray boom;
- and
- a microprocessor connected to the pressure transducer, wherein,
- the microprocessor compares the pressure sensed at the spray boom to determine a calculated spray application rate,
- the microprocessor compares the calculated spray application rate to a desired spray application rate, and
- the microprocessor directs a speed of the pump to deliver fluid to provide a spray head pressure corresponding to the desired, non-zero spray application rate.
Dependencies are inferred from the claim text.