Research On Distributed Optical Fiber Temperature Sensing System Based On Raman Scattering

In recent years, the technology of temperature measurement is developed to smarter,distributed and high precision. As a result, the distributed optic fiber temperature sensing technology becomes a research focus. It was invented by university of southampton, British.In the middle of 1970 s, it became an unique sense technology after a series of development.The distributed optical fiber temperature sensing technology has some unique advantages,such as high-accuracy measurement, interference, high stability and antielectromagnatic interference, small shape. So, this technology has widely used in the area of industry production, military detection, fire safety and so on.Firstly, this topic has studied the research background and significance of the distributed temperature optical fiber sensing system, and introduced the present research status at home and abroad, analyzed and studied the basic theory of this technology,and this topic discuss the advantage of the different demodulation plans.Secondly, according to the actual requirement of the parameter, this topic designs the overall structure of the temperature sensing technology. Do some basic theory researches of light source module, light transition module and detective module. Do a series of test.And offers a new method.Finally, this temperature measurement system was used to test the temperature along the optical fiber, through the data analysis, this topic gets the temperature information, verify the feasibility of this project.