Cortex-M3低功耗水文遥测终端的设计

Low Power Hydrological RTU Based on Cortex-M3

针对野外环境下水文数据的采集工作,以LPC1766为微控制器,设计了一种低功耗的水文遥测终端;从硬件和软件方面讨论了系统的构成,介绍了设备低功耗管理的实现方法;经试验测量该水文遥测终端静态值守电流仅1.2mA,工作电流峰值为70mA;本设备通过灵活的参数配置和多种通讯方式可以完成多种水文数据的实时采集、报送和处理应用。在设计中通过合理控制相关接口供电和自身耗电,较好地解决了在野外长时间供电的问题。

With LPC1766 as the controller, a kind of low--power hydrological remote terminal unit （RTU） used in hydrological data col- lection at unattended field has been designed. From the aspect of hardware and software, the system architecture has been studied. The method of realization for low power management of equipment has been introduced. The proposed hydrological RTU＇s static duty current is 1.2 mA and the peak current is 70 mA by measurement. The proposed RTU can complete real time multiple hydrological data collection, reporting and processing by flexible parameter configuration and various communication methods. The problem of long--term power supply has been well solved by controlling related interface power supply and power consumption.