Method and apparatus for controlling a variable fluid delivery system

摘要

A fluid delivery control system is provided for controlling a fluid delivery system to deliver a fluid under pressure at a target flow rate. In a hybrid mode, the preferred fluid delivery control system is responsive to signals from a pressure sensor and a flowmeter. Primary feedback control is provided using the sensed pressure from the pressure sensor, and the sensed flow rate from the flowmeter is utilized to provide compensation for the pressure responsive feedback control and to provide accurate measurements of flow rate and total flow for the fluid delivery system. The preferred fluid delivery control system is also capable of operating in flowmeter and pressure modes which are only responsive to signals from a flowmeter and a pressure sensor, respectively. In the preferred embodiment, the fluid delivery control system is utilized in a mobile sprayer system for applying an agent over a surface. A constant application rate of agent over the surface is maintained by varying the delivery rate of the fluid delivery system with the speed of the sprayer system.