14 February 2002 Realtime downhole imaging, multiparameter monitoring, and inspection using DSL technology based on DMT modulation with two-wire transmission
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Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456103
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States
Abstract
This paper focuses mainly on DMT transmission technology applying to downhole image transmission to extend bandwidth, also considers the details about using digital signal processor (DSP) to compress, process and reconfigure the image taken from infrared CCD camera and to process signals from multi-parameter sensors. The system is composed of multi-parameter sensors, infrared camera, TMS320c6x DSP for image compression and reconfiguration, ADSL modem chipset, ground computer, etc., which extends the bandwidth, decreases signal attenuation and abates the noise. Therefore system implements real time downhole imaging, multi-parameter monitoring and inspection by two-wire transmission over 7000 feet no repeaters.
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Chengbin Liao, Jian Zhang, Liying Wu, "Realtime downhole imaging, multiparameter monitoring, and inspection using DSL technology based on DMT modulation with two-wire transmission", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456103; https://doi.org/10.1117/12.456103
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