為滿足核聚變裝置EAST 極向場(chǎng)電源控制系統(tǒng)的實(shí)時(shí)性要求，設(shè)計(jì)了基于QNX 的實(shí)時(shí)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(shí)鐘實(shí)現(xiàn)的數(shù)據(jù)實(shí)時(shí)采集方式顯著減少了對(duì)CPU 資源的占用。實(shí)踐表明這種數(shù)據(jù)采集模式更適用
于實(shí)時(shí)控制應(yīng)用場(chǎng)合，是可靠而高效的。
關(guān)鍵詞：QNX，PCI，系統(tǒng)時(shí)鐘，實(shí)時(shí)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