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| Development and experiment of laser land leveling system |
1. Key Laboratory of Modem Precision Agrieuhure System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China; 2. College of Information Science and Technology, Agricultural University of Hebei, Baoding, Hebei 071001, China）
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Abstract The principle of laser land leveling technology was introduced. A low-cost laser land leveling system was developed, which mainly included a receiver, a controller, a hydraulic system and a bucket. Double optical filtering technology was employed in designing the receiver. Fuzzy control arithmetic was applied in the controller. Gear pump powered hydraulic system was adopted. Integrated with type JP300 laser transmitter made in China, this laser land leveling system was tested for producing level field surface and slope field surface. The result showed that the system could work stably with high accuracy. The Sd of the level field surface and the slope field surface fell to 1.01cm and 0.69cm from 13.96 cm and 21.7 cm respectively, which met the farmland irrigation requirement of Sd 〈 2 cm. After leveling, the percentages of the points whose absolute differences were less than 2 cm reached 96% and 97.6% respectively, indicating good performance of leveling distribution.
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2009, Vol. 30 
