為滿足核聚變裝置EAST 極向場電源控制系統(tǒng)的實時性要求，設(shè)計了基于QNX 的實時數(shù)據(jù)采集系統(tǒng)。與一般的軟件觸發(fā)數(shù)據(jù)采集方式相比，本文采用的利用QNX 系統(tǒng)時鐘實現(xiàn)的數(shù)據(jù)實時采集方式顯著減少了對CPU 資源的占用。實踐表明這種數(shù)據(jù)采集模式更適用
于實時控制應用場合，是可靠而高效的。
關(guān)鍵詞：QNX，PCI，系統(tǒng)時鐘，實時采集
Abstract: The poloidal field power supply control system of the nuclear fusion device—EAST
requires high real-time performance., so we designed this real-time data acquisition system based on QNX. Compared with normal software-trigger data acquisition mode, the real-time data acquisition mode described in this paper reduces system spending observably. The practice shows that the real-time data acquisition system based on QNX has high efficiency and reliability.
Keywords: QNX, PCI, system clock, real-time acquisition