描述
在彩色電視白場測試領域,通常采用由與圖1色度變換(I／V)構成集成化探頭,而將A／D變換與色度計算等工作交給PC機處理,例如美國Klein公司的K5／10系列。利用PC軟件技術,K5／10系列增加了頻譜分析功能,可以分析O～100Hz內的電視及計算機顯示器的“閃爍”,是CAl00／200系列所不能完成的。
在本文的工作中,筆者設計制作了CSE808新型的彩色分析虛擬儀器,特點在于將虛擬儀器的概念擴展到通信系統(tǒng)層的資源共享。采用ARM7TDMI內核的三星4510B硬件通信系統(tǒng)以及Vxworks嵌入式軟件實時操作系統(tǒng),實現(xiàn)了3路16位并行20kHz采樣率的光度色度數(shù)據(jù)采集,并采用100M以太網(wǎng)和TCP／IP協(xié)議傳輸數(shù)據(jù),領先于美國Klein公司的K5／10系列彩色分析儀。預計該系統(tǒng)在“刷新頻率”、“響應時間”等與顯示器相關的瞬態(tài)光度色度計量測試領域具有重要意義,在航空閃光警示燈質量檢定領域也具有重要應用價值。
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