智能小区远程抄表系统的低功耗设计

Low Power Design of Intelligent Community Remote Meter Reading System

以住宅小区中原有的机械基表为基础,以降低功耗为主要目的,通过加装零功耗磁敏传感器电路,采用低功耗的CMOS贴片作为外围器件,与LCM系列液晶显示器、EM78P458单片机、MAX3471通信接口等组成智能小区远程抄表系统。设计软件时,使单片机平时处于休眠状态,只有当需要采集数据、显示查阅测量数据、远传数据时才通过中断唤醒单片机使其工作。该系统具有功耗低、安装调试方便、性价比高、易于推广等特点。

By taking the original mechanical base meter in the residential district area as a foundation and reducing the power loss as the goal, through installing zero power consumptive magneto-dependent sensor circuit, using the low power loss CMOS pasted piece as the periphery component, and using parts as the LCM series liquid-crystal display, EM78P458 MCU, and MAX3471 communication interface and so on, the intelligent community remote meter reading system was composed. When designing software, the monolithic integrated circuit was usually to be at the dormant state, only when need collecting data, displaying and consulting survey data, and transmitting data remotely, the MCU was awaken to work through the interrupt. This system has characters of low power loss, convenient in installing and debugging, low price, and easy in promoting and so on.