Study on Variable Rate Spraying Technology Based on Pulse Width Modulation and Volume Control
Wang Chun · Journal of Agricultural Mechanization Research · 2007
This article is based on the technology and theory of precision agriculture. It sets forth the variable rate control method based on pulse width modulation which is used on the sprayer in China by discussing the actuality of the variable rate spraying in china and analyzing the disadvantage of the traditional variable spraying technique. This variable rate control system consists of PWM driven solenoids, variable rate controller and the executive software based on GIS maps .It gets the conclusion from large numbers of tests that the PWM method can accord with the requirement on volume control for variable rate sprayer and realize the flow control range of 4:1.