分布式恒压自动化灌溉系统的研制

Study on the distributing constant pressure automatic irrigation system

论述了分布式恒压自动化灌溉系统的系统结构,软、硬件设计方法和工程实例。通过采用变频调速器的多功能应用,实施软启动和软关机等技术手段,有效地避免了管网系统因“水锤”而爆管的现象发生;通过采用分布式系统结构和有线无线结合的经济组网方式等技术措施,极大地降低了工程建设成本和运行、维护、管理费用;重点介绍了在实践中非常有效的特殊电路和非常规处理方法,在采样的普通接点上施加100 V交流电,解决了恶劣条件下,因电接点腐蚀而影响系统长期可靠性的难题。其技术模式和设计方法,具有一定的参考价值。

In this paper the structure of automatic irrigaton system of distributing contant pressure, the design method of softwares and hardwares, and engineering examples are studied. The phenomenon of pipe explosion because of ＂water hammer＂ is avoided effectively through the applying of variable frequency speed regulation of multi-function and the implement of means of soft start and shut. The cost of engineering structure, maintainment and management are reduced greatly through the adoption of some measures, such as the distributing system structure, the combination of wire and wireless. By using the special circuit and the abnormal means of handlement, adding 100 V alternate current to the commom circuit point, we can solve the difficult problem of decayed circuit point which affect the long-term credibility of the system in the bad sitution.