Design of Wireless Site-Specific Spraying System Based on Machine Vision Technology

A control system for site-specific spraying which delivers pesticide spray selectively with respect to the characteristics of the targets based on machine vision technology was designed. In this system, the modbus protocol was used for the communication between the receiving terminal and the site-specific spraying terminal via GT-38 wireless module. The graphical user interface (GUI) was used to design the interface of human-machine included modes setting and image acquisition instructions sending. The prototype was tested in laboratory. The experimental results show that target recognition accuracy was 100%. The spraying uniformity in the target area was greater than 70%. The acquisition time of a single test was 2s, and the image information transformed into the action time interval of nozzle solenoid valve was less than 100 ms, which realized real-time detection and spraying.