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GPS是精准农业中常用的定位传感器。车辆在起伏路面行驶时,GPS输出的经纬度数据会有一定误差,对导航精度产生影响。本文基于航姿传感器AHRS-3000型设计了GPS定位误差修正系统,介绍了GPS修正系统组成,论述了矫正算法的实现。试验结果表明,该系统可以有效提高车辆在起伏路面行驶时的定位精度。1概述GPS导航系统是实现精准农业的重要设备,它的精度直接影响导航精度。农业机械在田间行驶时,受地面起伏影响车体会产生一定程度的倾斜,如图1所示。
GPS is a commonly used position sensor in precision agriculture. Vehicles in rough road driving, GPS output latitude and longitude data will have some error, the navigation accuracy. In this paper, GPS positioning error correction system is designed based on attitude sensor AHRS-3000, the composition of GPS correction system is introduced, and the realization of correction algorithm is discussed. The test results show that the system can effectively improve the positioning accuracy of the vehicle when it travels on rough road. 1 Overview GPS navigation system is an important device to achieve precision agriculture, its accuracy directly affects the navigation accuracy. Agricultural machinery in the field when driving under the influence of ground fluctuations will produce a certain degree of tilt, as shown in Figure 1.