Abstract

In order to improve the precision of the sprayer field operation and reduce the overlapping rate as well as the missing rate during the spray process, an auxiliary navigation system based on Baidu map JavaScript API (application programming interface) was designed to prevent overlapping spray and missing spray. Technologies such as serial communication, GPS (Global Positioning System) positioning, Baidu map API, path planning and geographic information system were integrated in this system. Accordingly, the functions of vehicle positioning, path planning, job navigation, doodle in operated areas, real-time data collection and automatic processing in spray process could be achieved. In order to verify the reliability and stability of the designed navigation system, an experimental platform was developed for auxiliary navigation system based on the self-developed 3WPG-3000 high clearance self-propelled sprayer. In addition, an RTK GPS and a computer were also integrated in this system. Moreover, experiments of AB line navigation and free line navigation were carried out. The results indicated that the overlapping rate of the AB line navigation and the free line navigation as well as the missing rate of them were 2.54%, 0.26% and 4.43%, 0.88% respectively, which meet the needs of sprayer field operation.

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