基于现场总线技术的农业机械控制系统研究

Study on Control System of Agricultural Machinery Based on Field Bus

探讨了CAN总线在智能农业机械上应用的可行性,确定了基于ISO11783的应用层通信协议的制定策略和具体方法。开发了应用于在线测产和变量施肥的CAN总线控制系统,并对提高系统可靠性措施进行了探讨。实验测试结果表明,总线控制系统运行稳定,满足了精准农业实时数据采集与控制的要求。

The development and future of the intelligent measurement and control system of agricultural machinery under the framework of precision agriculture was explained, and the necessity of applying field bus was therefore presented. CAN, a widely used field bus in automotive and other industries, was an appropriate choice for this system. Firstly, application layer protocol for CAN communication was established based on ISO 11783, which is an upcoming international communication standard for agricultural tractors and implements. Then,a prototype system was developed for on-line yield monitoring of rice and variable-rate fertilizing and seeding. The practical experience proved the effectiveness of the CAN-based system in agricultural operation. Results of this research are hoped to assist in wider application of precision agriculture in China.