生物膜式反应器内复杂热物理参数动态场分布的多尺度实时测量方法研究

项目名称： 生物膜式反应器内复杂热物理参数动态场分布的多尺度实时测量方法研究

项目编号： No.50876120

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 电工技术

项目作者： 赵明富

作者单位： 重庆理工大学

项目金额： 36万元

中文摘要： 本项目完成了（1）光纤Bragg光栅在"温度-横向压力"及"温度-轴向应力-横向压力"作用下的交叉敏感特性的理论模型和分析；（2）"三维分布式光纤Bragg光栅温度传感阵列系统"的测量机理与实现方法的研究，用于生物膜反应器内的温度场准分布式测量。（3）从理论和实验两方面研究腐蚀型光纤Bragg光栅传感器的折射率传感特性，验证其谐振中心波长、幅值、3dB带宽与外部介质折射率之间的理论关系。（4）研究单端腐蚀型光纤Bragg光栅对折射率与温度同时测量的理论模型，深入分析其主要结构参数对折射率灵敏度的影响，建立单端腐蚀型光纤Bragg光栅在低折射率区对折射率测量的线性近似和理论误差分析方法，制作单端腐蚀型光纤Bragg光栅用于简易生物膜反应器内生物膜厚度（或膜折射率）和温度的同时测量；（5）从理论和实验两方面研究腐蚀型光纤Bragg光栅在折射率为线性分布的非均匀液相介质下的响应特性，建立相应的折射率梯度传感的线性近似理论模型，探讨实时测量生物膜式反应器内气相和液相的浓度场分布的光纤光栅传感系统的可行性。项目完成论文22篇,其中SCI/EI 14 篇，授权发明专利4项.

中文关键词： 生物膜反应器；光纤Bragg光栅；温度场；折射率；生物膜厚度

英文摘要： Following five aspects were studied in this project. (1) The cross-sensing characteristcs model of the normal FBG affected by temperature-pressure and temperature-strain-presure. (2) A three-dementional temperature sensing array based on FBGs is designed and fabricated to measure the temperature-distribution field in an industrial biofilm reactor. (3)The responsive characteristcs of the Bragg wavelength, resonant peak and 3dB bandwith of the etched FBG to the surrounding regractive index (SRI). (4)The therotical model of single-end etched FBG for the simultaneous measurement for the SRI and temperature is proposed, and the impact of its structured parameters on its SRI sensitivity is analyzed in detail. The corresponding methodology of linear approximation and error analysis of the sensor for SRI measurement at the low refractive index area are established. In addition, a single-end etched FBG sensor is fabricated and used in the simultaneous monitoring for the biofilm thickness and temperature in a simple biofilm reactor.（5）The responsive characteristics of the etched FBG under uneven liquid medium with the SRI distribution being linear are analyzed throretically and experimentally,the theoretical modal for the linear-approximation measurement of the SRI gradient of the liquid medium by the etched FBG at this low SRI area is established, the possibility of the fiber grating sensing system used to measure the concentration field of the phase or liquid medium in the biofilm reator are disccused. In this project 22 articles are published among which 14 are indexed in SCI and EI, 4 invention patents are authorized.

英文关键词： biofilm reactor;fiber Bragg grating; temperature field; refractive index; biofilm thickness