一種可擴展的高精度可靠IO時序測試方法
網(wǎng)絡安全與數(shù)據(jù)治理 7期
蘇平，高飛，劉凱，張云飛，李蘭蘭
（北京航天自動控制研究所，北京100854）
摘要： 針對現(xiàn)有IO測試方法時序測量數(shù)量少、精度和可靠性低的問題，提出了一種可擴展的高精度可靠IO時序測試方法，實現(xiàn)了基于層次化的混合網(wǎng)絡架構的統(tǒng)一時鐘的可擴展大規(guī)模分布式IO時序測試系統(tǒng)。試驗表明該系統(tǒng)在有效提高了IO時序容量規(guī)模的同時，保證了每個時序的測量時間精度，同時這種測量精度不會隨層級增加而積累，各層級間誤差一致性較高，可在滿足大規(guī)模異步IO時序測試的同時，兼顧高精度和高可靠性，具有一定的實用價值。
中圖分類號：TP368.1
文獻標識碼：A
DOI:10.19358/j.issn.2097-1788.2023.07.013
引用格式：蘇平，高飛，劉凱，等.一種可擴展的高精度可靠IO時序測試方法［J］.網(wǎng)絡安全與數(shù)據(jù)治理，2023，42（7）：79-84.
文獻標識碼：A
DOI:10.19358/j.issn.2097-1788.2023.07.013
引用格式：蘇平，高飛，劉凱，等.一種可擴展的高精度可靠IO時序測試方法［J］.網(wǎng)絡安全與數(shù)據(jù)治理，2023，42（7）：79-84.
A scalable high precision and reliable IO timing sequence testing method
Su Ping, Gao Fei, Liu Kai, Zhang Yunfei, Li Lanlan
(Beijing Aerospace Automatic Control Institute, Beijing 100854, China)
Abstract： In this paper, a scalable highprecision and reliable IO timing test method is proposed to solve the problems of small number of timing measurements and low accuracy and reliability of existing IO testing methods, and a scalable largescale distributed IO timing test system based on hierarchical hybrid network architecture and unified clock is implemented. The test shows that the system not only effectively improves the capacity scale of IO timing sequence, but also guarantees the measuring time accuracy of each timing sequence. At the same time, the measuring accuracy will not accumulate with the increase of levels, and the error consistency between different levels is high. It can meet the requirements of largescale asynchronous IO timing sequence testing while giving consideration to high precision and high reliability, which has certain practical value.
Key words : timing sequence testing; hierarchical network; time synchronization
0 引言
IO型數(shù)字量由于其實現(xiàn)簡單可靠、成本低廉，常常作為嵌入式系統(tǒng)中獲取系統(tǒng)時序反饋、運行狀態(tài)的一種即時有效的采樣形式。但它常常受到芯片或者集成電路的體積限制，使得能夠同時采用這種形式的信號數(shù)量較少，無法較好適配采集IO型數(shù)字量規(guī)模較大的甚至跨地域分布的自動化控制系統(tǒng)，采集的實時性也常常無法與其在小規(guī)模系統(tǒng)中的應用效果相比。
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作者信息：
蘇平，高飛，劉凱，張云飛，李蘭蘭
（北京航天自動控制研究所，北京100854）
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