data acqusition system 中文意思是什麼
data acqusition system
解釋
數據截獲系統-
Divider, coaxial line, trigger, signal processing, data acquisition, acquisition control and waveform analysis software is included in the device. when the device operate in the system, overvoltage is transferred to coaxial line by the divider. if the overvoltage amplitude is higher than initialization value, data acqusition card start sampling. when sampling is over, computer save data to file. engineer can analyse parameter of waveform by appropriative software reading data from file
當裝置在線運行時，系統中出現的過電壓信號通過分壓器傳遞到同軸電纜，通過觸發電路判斷，如果大於預先設定的值則啟動採集卡的同時采樣，采樣結束后，計算機把數據存盤並以文件格式保存，管理人員隨時通過調用專用軟體調取文件進行各種參數分析。 -
Two channal high speed data acqusition system
雙通道高速數據採集系統的設計 -
In the dissertation ， we discribe the implementation of large capability video data acquisition system based on pci bus of computer 。 the system is composed of data acquisiton card and corresponding software 。 the data acquisiton card include two acquisition channels ， 8 - bit digitization at rates up to 13. 5mhz 。 frist ， the architecture of the video data acqusition system is studied 。 then ， the function and implementation methode of each module are introduced in detail 。 the control module of the video data acqusition card is implemented by using of the isp technology of cpld and vhdl programming technology 。 the a / d converter used assembler to implement the initialazation programe 。 and the double buffer technology is used for large capability data acqusition. because a contiously large memory is difficult to apply in windows operating system 。 finally we use broland c + + to introduced the devleoping procedure of drivers 。
在實際的研製過程中，利用cpld的在系統可編程（ isp ）技術和基於vhdl語言的可編程邏輯器件設計技術實現了視頻數據採集卡的控制模塊。在視頻的a / d轉換模塊，用匯編程序模擬i2c總線對初始化a / d轉換晶元。針對大容量數據採集，採用了雙緩沖技術解決wndows操作系統下難以申請到大容童連續內存的間題。
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