【作者】 王冬生； 王桂梅； 王玉田； 张继高； 潘玮炜；

【Author】 Wang Dongsheng~1 Wang Guimei~1 Wang Yutian~2 Zhang Jigao~1 Pan Weiwei~2 (1 Hebei Engineering University,Handan Hebi 056001,China; 2 Yanshan University,Qinhuangdao,Hebei 066004,China)

【机构】 河北工程大学； 燕山大学；

【摘要】 本文采用稀土荧光材料,设计了一套荧光光纤测温系统。系统选取经济实用的发光二极管作为光源,以稀土材料 Y₂O₂S:Eu+Fe₂O₃作为敏感材料,通过一套荧光信号检测装置,对荧光寿命进行测量。利用产生的荧光的周期与激励光相同,但在相位上滞后于激励光这一特性,对微弱荧光信号进行检测,有效抑制系统噪声,提高了系统的信噪比。通过实验对几种敏感材料进行光谱测试,Y₂O₂S:Eu+Fe₂O₃与光源相匹配,且对器件的要求较低,微弱信号检测装置利用光电放大器、带通滤波器、异或电路等有效消除噪声,提高了系统信噪比。光谱实验证明,Y₂O₂S:Eu+Fe₂O₃波峰的强度比 Y₂O₂S:Eu 高近一个数量级的紫外激发效率,且与 LED 光源及探测器相匹配,其测温范围从室温到450℃,分辨率为0.5℃,从而证明了系统的可行性。更多还原

【Abstract】 Based on the rare earth fluorescence material,a set of fluorescence optical fiber thermometric system was designed.The system selected the emitting LED,which was economical and practical as light source with the rare earth material Y₂O₂S:Eu+Fe₂O₃ as the sensitive material.A set of fluorescence signal measurement device can complete the fluorescence lifetime measurement.Making use of the characteristic that the fluorescence has the same period as exciting lights,which lags in phase to it,the system voice can be effectively made out of the signals and the signal-to-noise ratio can be advanced through the measurement of the weak fluorescence signal.Finally,the ex- periment of the optical spectrum to several sensitive materials confirms the match that Y₂O₂S:Eu+Fe₂O₃ is with light source and the feasibility of the system.The signal-to-noise ratio can be advanced through the measurement of the weak fluorescence signal measurement.The spectrum experiment has proved that the intensity of Y₂O₂S:Eu+ Fe₂O₃ is a quantitative level higher than Y₂O₂S:Eu.Among the detection rang from the room temperature to 450℃,the thermometer has an average temperature solution of 0.5℃.更多还原