【摘要】 研究和讨论了分布式光纤传感器系统的测温方法和原理,介绍了国内外的研究概况、存在的问题和当前的研究趋势,探索了新一代光纤非线性效应的光纤传感机理。提出了光纤非线性散射效应的融合原理,研究和设计了一系列基于光纤拉曼与布里渊散射的分布式光纤传感器,采用光纤色散与损耗光谱的自校正方法提高了系统的可靠性、空间分辨率和测温精度;采用脉冲编码调制光源,提高了系统的信噪比和测温精度。更多还原

【Abstract】 Temperature measurement methods and principles of the distributed optical fiber sensors(DOFS) are studied and discussed.The research profile and current research trends are introduced in this paper.New generation of optical fiber sensing mechanism based on optical fiber nonlinear effect is explored.The fusion principle of optical fiber nonlinear scattering effect is put forward to research and design a new generation of series distributed optical fiber sensors based on Raman and Brillouin scattering.The reliability,spatial resolution and temperature measurement accuracy of the system are improved using optical fiber dispersion and loss spectra of auto-correction method.Using pulse code modulation source,the signal to noise ratio of DOFS is improved.更多还原