智能电表中的实时钟校准研究  

Research on Real Time Clock Calibration of Smart Meter

作　　者：闫书芳 吴懋珏 华号 YAN Shufang;WU Maojue;HUA Hao(Jiangyin Changyi Corp.,Ltd,Jiangsu 214432,China)

机构地区：[1]江阴长仪集团有限公司,江苏214432

出　　处：《集成电路应用》2018年第4期24-27,共4页Application of IC

基　　金：国家工业和信息化部2015工业转型升级智能制造专项基金(0714-EMTC02-5378/4)

摘　　要：在智能电表中,结算方式已经由原有的电量结算转换为金额结算,并且费率模式也较以往的电表更为复杂,这些需求对智能电表中的实时钟(Real Time Clock,RTC)提出了更高的要求。而众所周知,影响实时钟精度的主要原因为晶体的温度偏差,晶体的温度曲线接近二次曲线,因此用二次曲线校正的方法,可修正晶体的温度偏差,从而提升智能电表的实时钟精度。In smart meter,settlement mode has changed from original electricity settlement to amount of settlement,and the multi-rate mode is more complicated than ever before.Therefore,higher demand is raised on RTC(Real Time Clock)of smart meter.Obviously,the main influence of clock accuracy is temperature deviation.Since the temperature curve is close to quadratic curve,the temperature deviation of crystal can be modified to improve the RTC accuracy of smart meter by the method of quadratic curve calibration.

关 键 词：集成电路设计 智能电表 实时钟 晶体 二次曲线 校准 

分 类 号：TN402[电子电信—微电子学与固体电子学]