A real time transmission system of long distance for nuclear logging

A real time transmission system of long distance for nuclear logging 1 first-author 1 corresp Corresponding author. E-mail address: skz@ustc.edu.cn Corresponding author. E-mail address: skz@ustc.edu.cn skz@ustc.edu.cn 1 State Key Laboratory of Particle Detection and Electronics, Anhui Key Laboratory of Physical Electronics, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China State Key Laboratory of Particle Detection and Electronics, Anhui Key Laboratory of Physical Electronics, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China Some specified chips in traditional Manchester-II encoding/decoding designs are used to guarantee strictly the stability of the input wave, otherwise the capacity of anti-interference and resilience are degraded seriously. In this paper, a new Manchester-II encoding/ decoding system is used for nuclear logging by a 7 000 m armoring cable. A thorough hardware wave tracking decoding algorithm is proposed and realized in a FPGA hardware chip. An on-site measurements show that this transmission system can decode correctly in real time, with a bit error rate of better than 10 –10 . Long distance transmission Hardware real time decoding algorithm Nuclear logging Armoring cable Manchester II code References Segesman F . Proceedings of the IRE, New York , 1962 , 50 : 2227 - 2243 . Proceedings of the IRE, New York Ellis D V , Singer J M . Well logging for earth scientists ( 2 nd Ed). Dordrecht : Springer Press , 2008 , 1 - 5 . Well logging for earth scientists Wait J R . IEEE Trans on MTT , 1990 , 38 : 1518 - 1521 . IEEE Trans on MTT Sklar B . Digital communications: fundamentals and applications ( 2 nd Ed.). New Jersey : Prentice Hall , 2001 , 85 - 89 . Digital communications: fundamentals and applications Li A Z . Progr Geophys , 2006 , 21 : 304 - 308 . (in Chinese) Progr Geophys Intersil I. HD-6408 datasheet , http://www.intersil.com/data/fn/fn2952.pdf ( 1997 ). Intersil I. HD-6408 datasheet Intersil I. HD-6409 datasheet , http://www.intersil.com/data/fn/fn2951.pdf ( 1997 ). Intersil I. HD-6409 datasheet Halliburton I . Excell 2000-C logging system overview . Houston : Halliburton Inc ., 1997 , 36 - 37 . Excell 2000-C logging system overview Western A . 572XA telemetry test system . Victoria : Western Atlas Logging Service , 1991 , 12 - 29 . 572XA telemetry test system Rochester W C I . Rochester stock type 7-H-464D . http://www.rochestercables.com/pdfs/datalines/a276469.pdf ( 2004 ). Rochester stock type 7-H-464D Oppenheim A V , Willsky A S , Hamid S . Signals and systems ( 2 nd Ed.). New Jersey : Prentice Hall , 1996 , 428 - 430 . Signals and systems Oppenheim A V , Schafer R W , Buck J R . Discrete-time signal processing ( 2 nd Ed.). New Jersey : Prentice Hall , 1999 , 465 - 469 . Discrete-time signal processing William R L . Techniques for nuclear and particle physics experiments ( 2 nd Ed.). Berlin : Springer Press , 1994 , 286 - 287 . Techniques for nuclear and particle physics experiments Qin W , Wang W , Chen P . Well Logging Technol , 2006 , 30 : 467 - 469 . (in Chinese) . Well Logging Technol IEEE C63.12-1987, American National Standard for Electromagnetic Compatibility Limits . http://standards.ieee.org/findstds/standard/C63.12-1987.html ( 1987 ). IEEE C63.12-1987, American National Standard for Electromagnetic Compatibility Limits Equipment engineering environmental conditions and environmental tests for telecommunications equipment , http://www.etsi.org/deliver/etsi_i_ets/300001_300099/3000190102/01_60/ets_3000190102e01p.pdf ( 1992 ). Equipment engineering environmental conditions and environmental tests for telecommunications equipment SEG-D2.1, SEG Technical standards , http://www.seg.org/resources/publications/misc/technical-standards ( 2006 ) SEG-D2.1, SEG Technical standards 10.13538/j.1001-8042/nst.22.366-371 Supported by the China National High Technology Research and Development Program (863 Plans) funding for this project (No, 2006AA09A102-02) . 2011-05-09 2011-12-20 2021-01-19 2011 Nuclear Science and Techniques 06 22