锁相相关检测技术在荧光光纤温度传感器中的应用  

Application of Phase Locked Detection Technology in Fluorescence Fiber-optic Temperature Sensor

作　　者：张月芳[1] 叶林华[2] 裘燕青[2] 

机构地区：[1]海南大学材料与化工学院热带生物资源教育部重点实验室,海南海口570228 [2]浙江大学物理系,浙江杭州310027

出　　处：《仪表技术与传感器》2009年第3期104-106,131,共4页Instrument Technique and Sensor

基　　金：海南省自然科学基金项目(807012);海南大学科研基金项目(kyjj0607);海南省教育厅高校科研项目(Hj2008-10)

摘　　要：用激光加热基座法生长出端部掺Cr3＋的YAG（Y3Al5O12）光纤荧光温度传感头，采用锁相相关检测技术对呈指数衰减的荧光寿命进行测量。在0～180℃测温范围内，测量误差为0．4℃，主要由信号处理电路引起。与其他的相敏检测技术相比，锁相相关检测提高了系统测量精度和抑制噪声的能力。系统动态响应好，抗电磁干扰，可应用于生物医疗和变电站等场所的温度监控。The YAG（Y3 Al5 O22 ） fiber-optic thermometer probe with Cr3 ＋ ion doped tip end was grown from the laser heated pedestal growth method, and a thermometer system based on its fluorescent decay was presented. A phase-locked detection method was used to check the fluorescence lifetime. In the range from 0 ℃ to 180℃ ,the measurement resolution achievable due to signal processing scheme is 0.4 ℃. Compared with other phase-sensitive detection techniques, phase-locked detection results in a signifi- cant improvement in the measurement accuracy, a high noise-suppression ability. Because of its good dynamic response and immu- nity to electro-magnetic interference, it may be used in microwave treatment and thermal monitoring of medium voltage substations.

关 键 词：CR3+ YAG温度传感器 荧光寿命 锁相相关检测 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]