A real time transmission system of long distance for nuclear logging

NUCLEAR ELECTRONICS AND INSTRUMENTATION

A real time transmission system of long distance for nuclear logging

CAO Ping，

SONG Kezhu，

YANG Junfeng

Nuclear Science and Techniques

Vol.22, No.6

pp.366-371

Published in print 20 Dec 2011

DOI：10.13538/j.1001-8042/nst.22.366-371

46601

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 transmissionHardware real time decoding algorithmNuclear loggingArmoring cableManchester II code

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