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《Well Logging Technology》 2009-02
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Design of Multi-channel & High-precision Multi-pole Array Acoustic Log Data Acquisition System

CHENG Xiang-yang1,JU Xiao-dong2,LI Hui-yin1,3,LU Jun-qiang2 (1.School of Petroleum Engineering,China University of Petroleum,Dongying,Shandong 257061,China;2.Faculty of Natural Resource and Information Technology,China University of Petroleum,Beijing 102249,China;3.CNPC Research Institute of Exploration and Development,Beijing 100083,China)  
Introduced is a kind of high-speed and high-precision parallel data acquisition system based on 6-Channel Simultaneous Sampling ADC with 8 channels communication,which has a resolution ratio of 16 bit and the highest conversion speed of 250 kSPS.The program-controlled selections of data acquisition speed and amount are available by use of Complex Programmable Logical Device(CPLD),which controls the first-in-first-out memory buffer waveform data.Data acquisition speed,acquisition amount and starting of wave acquisition are all controlled by DSP through serial command bus.Acquisition data are read through high-speed serial data bus and then are processed in real time.The whole circuit has the advantages of flexible control,advanced target,compact structure and is suitable for high performance downhole tools.
【Fund】: 国家自然科学基金资助项目(40804020 40574049)
【CateGory Index】: TP274.2
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