Improvement and experiment on laser-controlled land levelling system

Abstract

An improved laser-controlled land levelling system was developed for application in precision farmland management and water-saving irrigation. It was principally composed of a laser transmitter, a laser receiver, an intelligent controller, a hydraulic control system and a laser surveying system. A domestic JP3 laser transmitter was used to create a laser reference plane over the field. Duplex light filters were employed to weaken the disturbance from the sun in the development of the receiver. Some appropriate fuzzy mapping rules were used in the controller to control the hydraulic system. The laser surveying system was designed by combining a GPS for horizontal positioning and a laser system for vertical positioning. The experimental results show that the system could work with high accuracy and stability. © 2007 Taylor & Francis Group, LLC.