摘要
针对HT2000图形化远动终端交流信号采样模板升级设计的需求,在分析各种交流采样技术的基础上,选用Philips LPC2138作为CPU,ADS8365六通道同时采样系统进行模数转换,并使用锁相环电路获得当前电网频率的倍频信号驱动A/D转换器,实现了交流信号同步采样并完成了该模板的设计.测试和现场运行结果表明,所设计模板的实时性、测量精度和稳定可靠性等关键指标满足相关标准的要求.
. In order to meet the requirement of upgrade design for a graphical remote terminal unit, a smart telemeter module was implemented. The Philips LPC2138 was acted as CPU, and ADS8365 was used to analog to digital converting which is a 6-channel simultaneous sampling A/D converting system, and phase-locked loop circuit was used to follow electrical power grid frequency and generate frequency multiplication signal to drive A/D converting when designed this module. The result of laboratory test and site running indicates that measuring precision and reliability of this module follow correlative standards.
出处
《西安工程大学学报》
CAS
2013年第2期230-234,共5页
Journal of Xi’an Polytechnic University
关键词
锁相环
同步交流信号采样
远动终端
phase-locked loop
synchronous AC signal sampling
remote terminal unit
