【摘要】 介绍了一种数字三相电能变送器,对其硬件电路和软件设计作了阐述,并重点介绍了其利用RS—485通讯口实现的自动抄表功能的软件设计。该产品利用时分割乘法电路进行设计,设计简单,安装方便,使用灵活,已在实际中运行几年,效果良好。更多还原

【Abstract】 Aiming at the shortage of hanged Watt-hour meter,This paper introduces a kind of embedded three-phrase Watt-hour meter.Its hardware circuit and software program are all expatiated in this paper.The design of automatously copying out meter function’s soft-ware which comes true by making use of RS-485communication interface and is em-phased on.Based on time-divided multiplication circuit,the design of the Watt-hour me-ter is simple;the fixing of it is conveniency;the use of it is flexible.So during the years of the run in practice,it has gained good effect.更多还原