??? 摘? 要： 分析了基于PCI總線的天氣雷達高速數(shù)據(jù)采集系統(tǒng)工作原理和實現(xiàn)方案，實現(xiàn)了基于Linux平臺的天氣雷達高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" 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title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)" title="高速數(shù)據(jù)采集系統(tǒng)">高速數(shù)據(jù)采集系統(tǒng)的驅(qū)動、數(shù)據(jù)采集及處理的設(shè)計。該設(shè)計已成功應(yīng)用于天氣雷達中。?

??? 關(guān)鍵詞： PCI 總線；天氣雷達；數(shù)據(jù)采集；Linux平臺

?

??? Linux是開放源代碼、網(wǎng)絡(luò)化的操作系統(tǒng)，具有穩(wěn)定、高效、內(nèi)核可自由配置等特點。采用Linux 操作系統(tǒng)作為開發(fā)平臺與采用VxWorks 和Windows 作為開發(fā)平臺相比不僅有免費的優(yōu)勢，而且對于發(fā)展核心技術(shù)，提高信息安全有著極其重要的意義，是自主研發(fā)的一個方向。隨著我國天氣雷達的快速發(fā)展，天氣雷達在民用和軍事領(lǐng)域的應(yīng)用越來越廣泛。目前，天氣雷達高速數(shù)據(jù)采集、傳輸?shù)裙δ艽蠖蓟赪indows平臺進行開發(fā)實現(xiàn)，實現(xiàn)由Windows平臺向Linux平臺的轉(zhuǎn)換，對于發(fā)展中國自主知識產(chǎn)權(quán)氣象軟件核心技術(shù), 提高信息安全有著極其重要的意義。本文基于Linux 操作系統(tǒng)(2.6.23內(nèi)核)，實現(xiàn)了天氣雷達高速數(shù)據(jù)采集及處理，對天氣雷達系統(tǒng)由Windows平臺向Linux平臺移植具有參考價值。?

1 數(shù)據(jù)采集系統(tǒng)分析?

1.1 工作原理?

??? 天氣雷達高速數(shù)據(jù)采集系統(tǒng)由I/Q數(shù)據(jù)采集、FIFO緩沖、FPGA控制模塊及PCI總線芯片PLX9054組成，系統(tǒng)結(jié)構(gòu)框圖如圖1所示。?

?

?

??? 其核心部分為FPGA控制模塊，主要實現(xiàn)4個功能:(1)根據(jù)雷達量程和距離分辨率調(diào)整AD采樣時鐘的頻率；(2)控制AD兩路采樣數(shù)據(jù)寫入FIFO 緩沖以及DMA 傳輸時從FIFO中連續(xù)讀出數(shù)據(jù)； (3)與PCI總線控制芯片PLX9054 進行控制交互, 實現(xiàn)局部總線的讀寫控制、地址譯碼和中斷觸發(fā)；(4)與PLX9054 進行數(shù)據(jù)交互，使用FPGA內(nèi)部RAM保存控制天氣雷達發(fā)射機和接收機工作的命令及數(shù)據(jù)，完成對雷達工作的控制。?

??? I/Q數(shù)據(jù)采集輸出數(shù)據(jù)速度為2.4 Mb/s(I、Q數(shù)據(jù)各為24 bit)，通過FPGA控制，合并寫入到FIFO緩沖。FIFO緩沖為32 bit、深度為16 KB的數(shù)據(jù)緩存，有效位為24 bit；與計算機總線的接口采用32 bit的PCI總線接口芯片PLX9054，PC機通過它完成與數(shù)據(jù)采集系統(tǒng)的數(shù)據(jù)交互。?

1.2 PC機與采集系統(tǒng)數(shù)據(jù)訪問?

1.2.1 局部地址分配?

??? PC機與天氣雷達高速數(shù)據(jù)采集系統(tǒng)的數(shù)據(jù)訪問通過PCI總線芯片PLX9054實現(xiàn)，訪問目標為FIFO緩沖和FPGA片內(nèi)RAM。對FIFO緩沖和FPGA片內(nèi)RAM分配不同局部地址，通過對局部地址總線進行譯碼確定需要訪問的目標。FIFO 數(shù)據(jù)采用DMA傳輸方式連續(xù)讀出, 每次傳輸長度最大為8 KB,因此,設(shè)置FIFO空間32 bit局部地址范圍為0x20000000～0x2000FFFF，映射空間為PCI 地址空間bar2。?

??? FPGA片內(nèi)RAM位寬為32 bit, 采用局部地址范圍為0x40000000～0x400FFFFF。映射空間為PCI地址空間bar3。?

1.2.2 數(shù)據(jù)訪問方式?

??? FIFO緩沖為可編程FIFO，由FPGA根據(jù)片內(nèi)存儲的雷達參數(shù)進行控制。當(dāng)FIFO中數(shù)據(jù)達到設(shè)置的大小時，觸發(fā)PCIPLX9054引發(fā)PCI中斷，通過該中斷向驅(qū)動程序申請發(fā)起DMA 傳輸。驅(qū)動程序響應(yīng)該中斷后設(shè)置PCIPLX9054的DMA寄存器, 發(fā)起方向從局部總線到PCI總線的DMA傳輸，完成FIFO數(shù)據(jù)向PC機的傳輸。?

??? FPGA片內(nèi)RAM通過PCI地址映射，使用IO操作方式進行數(shù)據(jù)讀寫訪問。?

2 Linux程序?qū)崿F(xiàn)?

??? 天氣雷達高速數(shù)據(jù)采集系統(tǒng)基于Linux2.6內(nèi)核平臺程序，由基于PCI總線的設(shè)備驅(qū)動程序、數(shù)據(jù)采集及處理程序組成。?

2.1 設(shè)備驅(qū)動程序?qū)崿F(xiàn)?

??? 設(shè)備驅(qū)動程序的功能是在Linux2.6系統(tǒng)平臺下，通過對PCI總線控制芯片PLX9054的控制,實現(xiàn)PC機與采集板的數(shù)據(jù)交互，實現(xiàn)雷達采集數(shù)據(jù)的實時接收及雷達工作狀態(tài)的控制。從功能結(jié)構(gòu)上，設(shè)備驅(qū)動主要由設(shè)備裝載及初始化、提供給用戶層的接口函數(shù)、中斷及DMA數(shù)據(jù)傳輸三部分組成。?

2.1.1 設(shè)備裝載及卸載?

??? 設(shè)備裝載和卸載即是Windows系統(tǒng)中設(shè)備驅(qū)動安裝和卸載。在Linux2.6中，裝載和卸載主要通過調(diào)用系統(tǒng)提供的PCI總線驅(qū)動注冊函數(shù)pci_register_drive和注銷函數(shù)pci_unregister_driver來實現(xiàn)，其注冊的driver數(shù)據(jù)結(jié)構(gòu)如下：?

??? static struct pci_driver? plx9054_pci_driver = {?

??? ???? .name? = 'pci9054',?

??? ???? .id_table? = plx9054_pci_tbl,?

??? ???? .probe = plx9054_probe,?

??? ???? .remove??? = plx9054_remove,?

??? ???? };?

??? 當(dāng)系統(tǒng)引導(dǎo)時，高速數(shù)據(jù)采集系統(tǒng)板上電后，板上PCI總線固件對PLX9054設(shè)備進行缺省配置，為設(shè)備的每個地址區(qū)域分配好資源。裝載函數(shù)在驅(qū)動中用module_init聲明，進行設(shè)備的初始化工作，調(diào)用PCI總線驅(qū)動注冊函數(shù)，根據(jù)id_table定義的信息對PCI設(shè)備PLX9054進行探測識別，完成PLX9054設(shè)備驅(qū)動的PCI總線注冊,然后調(diào)用驅(qū)動注冊的probe函數(shù)，完成PLX9054設(shè)備使能、PCI地址空間映射、PLX9054設(shè)備數(shù)據(jù)結(jié)構(gòu)初始化、設(shè)備注冊(注冊為字符設(shè)備)等操作。卸載函數(shù)用module_exit聲明，是裝載的逆過程，通過調(diào)用PCI總線驅(qū)動卸載函數(shù)，繼而調(diào)用注冊的remove函數(shù)、注銷設(shè)備及PCI地址空間映射、釋放分配給設(shè)備的數(shù)據(jù)結(jié)構(gòu)空間等操作，完成系統(tǒng)資源釋放。?

2.1.2 設(shè)備接口函數(shù)?

??? 設(shè)備接口函數(shù)為用戶提供與設(shè)備進行交互的不同功能接口，主要完成用戶與設(shè)備的讀、寫及設(shè)備控制訪問等功能，其數(shù)據(jù)結(jié)構(gòu)設(shè)計為：?

??? static const struct file_operations plx9054_fops = {?

??? ???? .owner = THIS_MODULE,?

??? ???? .open????? = plx9054_open,? /*打開設(shè)備*/?

??? ???? .release?? = plx9054_close,? /*釋放設(shè)備*/?

??? ???? .ioctl???? = plx9054_ioctl,? /*IO操作*/?

??? ???? .read????? = plx9054_read,? /*讀設(shè)備*/?

??? ???? };?

??? 這個數(shù)據(jù)結(jié)構(gòu)在設(shè)備裝載過程中，作為設(shè)備注冊的參數(shù)完成與設(shè)備掛接、使用戶在系統(tǒng)調(diào)用中能訪問到上述關(guān)聯(lián)的設(shè)備接口函數(shù)。?

??? 設(shè)備打開函數(shù)plx9054_open完成以下操作：設(shè)備私有數(shù)據(jù)結(jié)構(gòu)內(nèi)存空間分配及初始化，DMA連續(xù)物理內(nèi)存空間申請，為天氣雷達最大距離探測采集數(shù)據(jù)的大?。徽{(diào)用pci_map_single將分配的DMA內(nèi)存空間映射為用于DMA傳輸?shù)刂?；DMA數(shù)據(jù)緩沖區(qū)分配(容量為2 MB)，緩沖區(qū)保存每次DMA傳輸中獲取的數(shù)據(jù)；調(diào)用request_irq對中斷函數(shù)p9054_interrupt進行中斷號申請；對天氣雷達工作參數(shù)進行缺省配置，啟動雷達工作。設(shè)備釋放函數(shù)PLX9054_close完成的操作與設(shè)備打開函數(shù)與PLX9054_open相反。IO操作函數(shù)PLX9054_ioctl通過sys_ioctl系統(tǒng)調(diào)用，完成用戶與設(shè)備的信息查詢、雷達工作參數(shù)配置與查詢，如驅(qū)動軟件版本號、雷達當(dāng)前工作各參數(shù)配置和查詢，主要用于對FPGA中RAM內(nèi)存空間的雷達工作參數(shù)數(shù)據(jù)訪問。由于這部分數(shù)據(jù)對訪問速度要求不高，使用IO操作能很好地滿足設(shè)計要求。讀設(shè)備函數(shù)PLX9054_read將驅(qū)動DMA數(shù)據(jù)緩沖區(qū)中的數(shù)據(jù)實時讀取到用戶空間緩沖區(qū)內(nèi)，完成采集數(shù)據(jù)從設(shè)備到用戶的讀取操作。?

2.1.3 中斷處理及DMA傳輸?

??? 中斷處理及DMA傳輸是驅(qū)動的核心部分，它的設(shè)計質(zhì)量直接影響到雷達采集數(shù)據(jù)能否正確、實時地從采集系統(tǒng)板傳送到設(shè)備驅(qū)動緩沖區(qū)，并實時被用戶獲取。中斷處理工作流程如圖2所示。?

?

?

??? 由于DMA數(shù)據(jù)緩沖區(qū)遠大于每次DMA數(shù)據(jù)傳輸大小，這對于雷達數(shù)據(jù)采集中因用戶讀取數(shù)據(jù)延遲而導(dǎo)致的緩沖區(qū)溢出有較好的抑制作用，而相對于現(xiàn)有計算機平臺，2 MB內(nèi)存容量已足夠。DMA數(shù)據(jù)緩沖區(qū)設(shè)計為循環(huán)緩沖區(qū)，使用讀、寫指針維護，在中斷處理中更新其寫指針，在PLX9054_read中更新其讀指針，采用溢出則覆蓋的機制，既方便管理，節(jié)省資源，同時又可對溢出進行計數(shù)，很方便進行實時性能的測試。?

2.2 數(shù)據(jù)采集處理程序?qū)崿F(xiàn)?

??? 數(shù)據(jù)采集處理程序是雷達高速數(shù)據(jù)采集系統(tǒng)的應(yīng)用處理程序，完成雷達高速數(shù)據(jù)采集及對采集數(shù)據(jù)的數(shù)字信號處理、輸出天氣雷達生成一次產(chǎn)品。其主要流程如圖3所示。?

?

?

??? 在采集I/Q數(shù)據(jù)時，I/Q兩路數(shù)據(jù)采用交叉采集方式存入FIFO緩沖中，每路數(shù)據(jù)有效位為23，最高位為符號位。因此，在采集數(shù)據(jù)處理中需對讀取的數(shù)據(jù)進行I/Q數(shù)據(jù)分離，即將采集數(shù)據(jù)恢復(fù)為原始I、Q兩路數(shù)據(jù)，同時將24 bit數(shù)據(jù)轉(zhuǎn)換為32 bit數(shù)據(jù)方式存儲，以滿足后面數(shù)字信號處理要求。?

??? 在軟件設(shè)計中，不同數(shù)字信號處理功能采用不同數(shù)字信號處理函數(shù)實現(xiàn)，在采集數(shù)據(jù)獲取前進行選擇配置，數(shù)字信號處理功能增加可通過增加相關(guān)的數(shù)字信號處理函數(shù)來滿足，以方便功能的完善和移植。通過對I/Q數(shù)據(jù)分離后獲得的數(shù)據(jù)進行相關(guān)數(shù)字信號處理即可獲得天氣雷達中的一次產(chǎn)品，如功率和反射率等。?

??? 本文基于Linux2.6平臺，設(shè)計實現(xiàn)了天氣雷達高速數(shù)據(jù)采集系統(tǒng)的驅(qū)動和數(shù)據(jù)采集及對采集數(shù)據(jù)的數(shù)字信號處理，并在現(xiàn)有天氣雷達上完成了調(diào)試驗證。目前，本設(shè)計已成功地應(yīng)用在現(xiàn)有的天氣雷達中。?

參考文獻?

[1] 何建新.現(xiàn)代天氣雷達[M].成都:電子科技大學(xué)出版社,2004.?

[2] CORBET J, RUBINI A. Linux設(shè)備驅(qū)動程序[M]. 3版.?北京:中國電力出版社, 2006.?

[3] PLX Technology,Inc. PCI9054 data book version 1.0[R].1998.