[1]楊杰,李艷芹,陳小安,等.基于LPC1788的AMI碼解碼電路的設計與實現[J].石油管材與儀器,2018,4(03):12-14.[doi:10.19459/j.cnki.61-1500/te.2018.03.003]
             YANG Jie,LI Yanqin,CHEN Xiaoan,et al.Design and Implementation of AMI Decoder Circuit Based on LPC1788[J].Petroleum Tubular Goods & Instruments,2018,4(03):12-14.[doi:10.19459/j.cnki.61-1500/te.2018.03.003]
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            基于LPC1788的AMI碼解碼電路的設計與實現
            分享到:

            《石油管材與儀器》[ISSN:2096-0077/CN:61-1500/TE]

            卷:
            4
            期數:
            2018年03期
            頁碼:
            12-14
            欄目:
            開發設計
            出版日期:
            2018-06-20

            文章信息/Info

            Title:
            Design and Implementation of AMI Decoder Circuit Based on LPC1788
            文章編號:
            2096-0077(2018)03-0012-03
            作者:
            楊杰1李艷芹2陳小安1王華波1
            1.中國電子科技集團公司第二十二研究所 河南 新鄉 453003;2.中國石油集團渤海鉆探工程有限公司測井分公司 天津 300280
            Author(s):
            YANG Jie1 LI Yanqin2CHEN Xiaoan1WANG Huabo1
            1.The 22nd Research Institute of CETC, Xinxiang, Henan 453003, China;2. Logging Co., Bohai Drilling & Exploration Engineering Co.of CNPC, Tianjin 300280, China
            關鍵詞:
            生產井AMI碼自動增益ARM單片機
            Keywords:
            production well AMI code automatic gain ARM microcontroller
            分類號:
            P631.4+3
            DOI:
            10.19459/j.cnki.61-1500/te.2018.03.003
            文獻標志碼:
            A
            摘要:
            針對目前生產測井儀器種類多、編碼方式各異的特點,設計了一款基于LPC1788的地面接收卡。在詳細介紹AMI碼型、幀數據格式的基礎上,重點闡述板卡的信道均衡、自動增益調整等硬件電路設計和AMI碼的解碼時序。根據碼型特點,對長連零情形下的誤碼原因進行剖析,通過采用響應速度更快的ARM芯片、優化解碼時序,消除了位累積時鐘偏差,有效地降低了誤碼率。在某油田生產井的應用實踐表明,該板卡性能穩定、使用靈活、兼容性強,能夠滿足生產測井對于數據傳輸的需求,進一步擴展了SKD3000數控測井儀的應用范圍。
            Abstract:
            Aiming at the characteristics of current production well tools and various coding methods, a surface receiving circuit based on LPC1788 is designed. On the basis of the detailed introduction of AMI pattern and its frame format, the hardware circuit design, such as channel equalization and automatic gain adjustment, and the decoding timing of the AMI code are mainly elaborated. According to the characteristics of AMI code, the cause of error is analyzed in the case of decoding continuous zero. By optimizing the decode timing and applying ARM, the accumulated deviation of bit clock is greatly eliminated and therefore the decoding BER becomes much lower. The application practice in production well of an oilfield demonstrates that the circuit presents some characteristics of stable, flexible and strong compatibility and can meet the demand of data transformation for production well logging, which further expands the application range of SKD3000.

            參考文獻/References:

            [1] 周志彬,王忠義,馬文中.50 kbit/s曼徹斯特碼測井電纜通信系統研制[J].測井技術,2006,30(6):576-579.
            [2] 董惠娟,李瑞敏,張廣玉.單芯測井電纜頻率特性分析[J].光纖與電纜及其應用技術,2008,32(6):17-20.
            [3] 謝飛.測井電纜數據傳輸方式的分析說明[J].石油儀器,2011,25(5):94-96.
            [4] 梁忠明.20臂井徑測井儀的研制及應用[J].石油管材與儀器,2015,1(5):24-26.

            備注/Memo

            備注/Memo:
            第一作者簡介:楊杰,女,1987年生,工程師,2012年畢業于長安大學信號與信息處理專業,目前從事石油測井設備的設計和技術支持工作。E-mail:[email protected]
            更新日期/Last Update: 2018-06-25
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