標題: IEEE 1588 precision time protocol [打印本頁] 作者: jacky002 時間: 2008-9-14 10:34 AM 標題: IEEE 1588 precision time protocol 第一次聽到IEEE 1588 唉 ??? 什麼碗糕? $ x# }$ A. a+ J3 [大致了解過後，喔 簡單說就是以前NTP(Netowork Time Protocol)的軟體時間解決方案的延伸加強版。使用硬體的方式將時間的精準度提升到1 ms。不僅可以可以在網通產品用，未來任何消費性產品要跨不同國家區域，就可以透過GPS的模組，自動更新時間的資訊，完全不需人為設定來指定時間。 3 ~& W6 Y* R* `9 s% b/ G& b 7 P* l+ m s4 _8 F! V% N8 T- N/ [" h/ e# G以下是Google一些文件的簡短說明給大家參考: / p0 [ R8 M0 M' dThe IEEE 1588 Standard Precision' s& S% T0 U$ [& {3 ]. G5 F$ H( [3 v
Time Protocol (PTP) is being used by industrial automation applications for precise time synchronization (PTS) on Ethernet networks. PTS provides accurate time synchronization for distributed control nodes. / ]1 n4 ?! v% P3 a2 @; p! M: K 4 I$ D8 |- h6 g( n: yThe IEEE 1588 precision time protocol handles synchronisation in industrial control systems to within less than a microsecond. This timing includes synchronising local clocks in sensors, actuators, and other terminal devices using the same network that also transports process data. The 1588 clock is used in a sensor in one of two ways. It can generate a timestamp at the moment the data is acquired or used as a mechanism to generate the acquisition trigger. Such precise timing is crucial to real time industrial Ethernet.9 n H- H+ S( Y6 U# N6 j' l1 ^