为了实现从室温到1000℃范围内的多点温度实时测量, 基于红蓝宝石光纤传感探头, 研制了一种连续快速温度测量的多通道光纤温度传感器.该系统结合了荧光测温和辐射测温原理, 可同时测量8个传感探头的温度随时间的变化信号.提出基于面积平衡计算的数字迭代算法用来计算荧光寿命.与快速傅里叶变换算法的仿真对比结果表明, 该算法计算速度快、抗噪声能力强、结果稳定性好、测量精度高.对系统进行长期的温度和稳定性实验, 结果表明该系统具有较高的稳定性和测量精度, 测温范围从室温到1000℃, 精度达±1℃.

To measure the temperature range from room temperature to 1 000℃, a sapphire-ruby fiber -based multi-probe thermometer was proposed. The thermometer system combines fluorescence lifetime with radiationand, which can measure the temperature of 8 probes at the same time. A digital iteration algorithm based on area balance was presented to measure the fluorescence lifetime. Compared with the Fast Fourier Transformation algorithm through simulation, the proposed algorithm features robust, high efficiency, strong anti-noise and immune to background level. The temperature test and stability test of the system were studied for a long time, the results show that the system has high stability and accuracy, the measured temperature range from room temperature to 1 000℃, the accuracy can be ±1℃.