Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Signal processing

Research on Signal Processing Technology of Fiber-optic Hydrogen Sensors Based on DSP

Author GeHanMing
Tutor ZhangGang
School Huazhong University of Science and Technology
Course Mechanical Engineering
Keywords Hydrogen Fiber Optic Sensors Digital Signal Processing Weak Signal Detection
CLC TN911.7
Type Master's thesis
Year 2011
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Energy is an important driving force for the development of the world , and hydrogen by various national attention as a new , efficient and clean energy , how to safely use hydrogen as an important issue was placed in front of everyone . The accurate detection of hydrogen relationship to the safety of the use of hydrogen . In view of this , the project studied the digital signal processing unit of the fiber-optic sensor system , dedicated to the development of a DSP-based processor simple , fast fiber hydrogen detection system and can adapt to a variety of environments . Digital signal processing is the use of a computer or a dedicated processing device , filtering the signal to a numerical calculation method , conversion, compression, recognition, enhancement processing in order to achieve the extraction of useful information , and ease of application purposes . With the rapid development of computer and information science , digital signal processing theory and techniques become more sophisticated, has been widely used in various fields . In this thesis, on the basis of extensive reading and understanding of the relevant literature , combined with the weak signal digital processing , analysis of the hydrogen detection difficult , demonstrated the feasibility of hydrogen weak signal detection . Full use of the advantages of digital signal processing , the DSP processor is introduced into the optical fiber the hydrogen sensor detects . In signal processing system , TMS320F2812 DSP chip as the core , the design and development of digital signal processing peripheral circuits . TI's software development platform CCS as the theoretical basis of weak signal detection , digital filter , digital lock-in amplifier technology , and eventually achieve a stable performance of the light source drive unit as well as fiber optic hydrogen signal detection system . Finally, based on the above discussions and studies , developed a DSP-based digital signal processing unit , and a hydrogen gas sensor is carried out in the laboratory existing platform support detection experiments . The experimental results show that the developed DSP processor core signal processing system in signal analysis , processing a lot of advantages and broad application prospects .

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