基于SOC方案的电能表日计时误差控制研究Research on Daily Timing Error Control of Watt-hour Meter Based on SOC Scheme
范卓霞,杨草田
FAN Zhuoxia,YANG Caotian
摘要(Abstract)：
集成多个元件的SOC方案具有成本优势,成为电能表厂家关注的一个重点,此方案采用晶振外置,日计时误差容易受到干扰。通过对日计时误差影响因素的分析可知,主要是受环境温度、补偿温度及晶振老化程度等的影响,从器件选择、布板设计、焊接工艺等方面提出了控制要求,实践证明SOC方案的日计时误差可以达到与独立时钟芯片方案同样的精度及可靠性要求。
The system on a chip(SOC) scheme which integrates multiple elements becomes a focus of Watthour meter manufacturers due to its cost advantage. This scheme adopts external crystal oscillator, so daily timing error is vulnerable to interference. Through analyzing influencing factors of daily timing error, it is obtained that daily timing error is mainly affected by ambient temperature, compensation temperature, aging degree of crystal oscillator and etc. This paper presents control demands from aspects of device selection, fabric swatch design, welding technology and so on. It is verified that daily timing error based on SOC scheme can achieve the same accuracy and reliability requirements as the independent clock chip scheme.
关键词(KeyWords)：
SOC方案;电能表;日计时误差;可靠性控制
SOC scheme;Watt-hour meter;daily timing error;reliability control
基金项目(Foundation):
作者(Author):
范卓霞,杨草田
FAN Zhuoxia,YANG Caotian
DOI: 10.19585/j.zjdl.2014.05.008
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