一种光纤荧光光谱测温方法的研究

Research on a method for optical fiber fluorescence specture temperature measurement

基于光纤荧光的测温机理介绍了一种温度测量系统的构成。系统采用Cr3+:YAG晶体作为荧光材料,蓝色发光二极管激励光源。经光纤将荧光信号输出,输出频率被输入到单片机系统中,单片机计算出荧光寿命,进而得到目标温度值。该系统对温度的测量具有准确度高、抗电磁干扰、分辨率高等特点,并且可以结合相关计算机技术和数据采集单片机系统实现通讯控制,操作简单,可以及时测量并存储数据,提高了系统的智能化。利用该装置通过检测荧光物质寿命实现了高精度温度测量,其误差小于±5℃。

Based on the mechanism of optical fiber fluorescence temperature measurement, a temperature measuring system is designed and the configuration of the system is described. The system uses Cr3＋： YAG crystal as fluorescent material and blue light-emitting diode as exciting source. The fluorescence signal is transmitted via the optical fiber, the output frequency of which is recorded into a SCM system.The microcontroller calculates the fluorescence lifetime, and then gets the target temperature. The system has characteristics of high accuracy, resistance to electromagnetic interference and high resolution in temperature measurement. At the same time combined with computer technology and data acquisition microcomputer system, the system can complete communication control in simple operation way, measure and store the data in timely manner. The intellectualization of system is increased. By testing the life time of fluorescent material , thetemperature measurement is completed accurately with the error less than ±5℃.