為實現尺寸較大、內部結構較為復雜的星載電子設備的多余物自動檢測，設計了以EZ-USB FX2和CPLD芯片為核心器件的數據采集卡，實現了四通道的同步數據采集和傳輸。此系統包括數據采集、數據緩存以及數據控制和傳輸，分別采用了采樣率為500 k 的12位A/D轉換器件AD7892、16 k×18位的FIFO CY7C4265、EPM7064和USB芯片CY7C68013。重點介紹了數據采集系統的硬件組成和軟件設計，包括USB的固件程序、CPLD的控制程序和主機用戶程序。實驗結果表明，該系統能達到穩定傳輸速度為15.4 MB/s，保證了四通道同時以500 k的采樣率工作的穩定性和正確性。

　　Abstract:

　　In order to implement the remainder auto-detection of large and complex electric equipment in the satellite， a four-channel data acquisition card is designed based on EZ-USB FX2 and the CPLD in the paper. It realizes the function of the synchronous data acquisition and transmission. The system includes data collection， data caching， data control and transmission， respectively using A/D conversion device AD7892 with 12-bit， 500 k sampling rate， 16k×18bit FIFO CY7C4265， EPM7064 and USB chip CY7C68013. This paper focuses on hardware and software design about the data acquisition system， including the USB firmware， CLPD control program and the host user program. Experimental results show that the stable data transmission speed of the system is 15.4MB/s， which ensure the stability and validity.