液晶与显示Issue(6)：1052-1056,5.DOI:10.3788/YJYXS20153006.1052
基于 FPGA 的高精度守时方法研究
Method for high accuracy time keeping based on FPGA
摘要
Abstract
Based on Field-Programmable Gate Array (FPGA),a high precision time keeping technolo-gy is proposed.Combined with high precision constant temperature crystals and BD/GPS dual-mode synchronous,standard second pulse signal is received based on statistics.If navigation satellite loses the connection,FPGA will set the pounding threshold of crystal pulse according to average value and variance to simulate producing highly precision second pulse so that cumulative error can be elimina-ted.Experimental results show that timing system error is less than punctual 250 ns in one hour which fully meets the requirements of time keeping of the timing system in the power systems,range systems and other systems.关键词
FPGA/双模/失连/守时Key words
FPGA/dual-mode/connection losing/time keeping分类
信息技术与安全科学引用本文复制引用
王军,王磊,张福弟,何昕,曹永刚..基于 FPGA 的高精度守时方法研究[J].液晶与显示,2015,(6):1052-1056,5.基金项目
国家自然科学基金(No.61472267) Supported by National Nature Science Foundation of China(No.61472267) （No.61472267）
