一种可扩展的高精度可靠IO时序测试方法
网络安全与数据治理 7期
苏平,高飞,刘凯,张云飞,李兰兰
(北京航天自动控制研究所,北京100854)
摘要: 针对现有IO测试方法时序测量数量少、精度和可靠性低的问题,提出了一种可扩展的高精度可靠IO时序测试方法,实现了基于层次化的混合网络架构的统一时钟的可扩展大规模分布式IO时序测试系统。试验表明该系统在有效提高了IO时序容量规模的同时,保证了每个时序的测量时间精度,同时这种测量精度不会随层级增加而积累,各层级间误差一致性较高,可在满足大规模异步IO时序测试的同时,兼顾高精度和高可靠性,具有一定的实用价值。
中圖分類號:TP368.1
文獻(xiàn)標(biāo)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(kuò)展的高精度可靠IO時(shí)序測試方法[J].網(wǎng)絡(luò)安全與數(shù)據(jù)治理,2023,42(7):79-84.
文獻(xiàn)標(biāo)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(kuò)展的高精度可靠IO時(shí)序測試方法[J].網(wǎng)絡(luò)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(shí)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(shí)序反饋、運(yùn)行狀態(tài)的一種即時(shí)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(shí)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(shí)時(shí)性也常常無法與其在小規(guī)模系統(tǒng)中的應(yīng)用效果相比。
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作者信息:
蘇平,高飛,劉凱,張?jiān)骑w,李蘭蘭
(北京航天自動控制研究所,北京100854)

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