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Development of Optical Time Domain Reflectometer Based on DSP

Author: ShenMeiLi
Tutor: DuZhenLin；GuoXun
School: Changchun University of Science and Technology
Course: Physical Electronics
Keywords: Optical Time Domain Reflectometer Optical fiber DSP High - speed data acquisition Hardware cumulative
CLC: TP332
Type: Master's thesis
Year: 2002
Downloads: 250
Quote: 5
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Abstract


Optical time domain reflectometer (OTDR) is a new fiber failure test equipment developed in the eighties , the full name is the Optical Time Domain Reflectometer . OTDR major in engineering useful to be able to easily identify the breakpoint of the optical fiber , and fault location . It has been proposed by the world's attention because of its unique non-destructive measurements , fully functional , security , ease of use , etc. . OTDR widespread shortcomings in the market is slow , and the main reason is the As the OTDR cumulative technology is achieved by software , not precise enough fast enough lost a lot of data , so that the measurement results . In view of this shortcoming , the paper presents a hardware implementation accumulate technology greatly improves the speed and performance of the system , and the expected price is far lower than similar products at home and abroad . The paper briefly introduced the development of the current OTDR elaborated its works and design of the mechanism of the OTDR system functional modules . Following the theoretical part , the paper focuses on the hardware and software design of high-speed data acquisition system , a detailed description of the whole process of design as the entire system of the processor with the DSP . Described DSP software design process and filter algorithms in software design part . Finally, given the actual measurements of the system , the analysis of the main factors that cause system instability , and how to improve the system stability .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Arithmetic unit and the controller (CPU)
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