瞬态表面温度传感器超高温外推测试技术研究  

Research on Extrapolation Method for Transient Surface Temperature Sensor

作　　者：郝晓剑[1,2] 郝丽娜[1,2] 周汉昌[1,2] 姜三平[1,2] 李园[1,2] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [2]中北大学电子测试技术重点实验室,山西太原030051

出　　处：《兵工学报》2013年第10期1341-1344,共4页Acta Armamentarii

基　　金：山西省高等学校留学回国人员科研项目(2012);山西省回国留学人员科研项目(2012-068);太原市科技局明星专项项目(120247-20)

摘　　要：提出利用外推法拓宽蓝宝石光纤黑体腔高温传感器测量范围,通过分析蓝宝石光纤黑体腔的导热规律建立了瞬态受热的黑体腔外推模型,利用分离变量法对外推模型进行求解,得到传感器的测温上限为3 005℃.设计完成了外推方法的实验验证,利用大功率高频可调制CO2激光脉冲作为1 500℃高温阶跃输入信号测得该传感器时间常数为10-2s数量级。利用同一激光脉冲作为热源、用该传感器和校准过的高速红外测温仪同时测得的黑体腔内外膜层温度变化曲线,验证了外推模型及方法的正确性。A new temperature extrapolation method, which is used to broaden the measurement range of a sapphire optical fiber blackbody cavity temperature sensor, is proposed. A transient heating black body cavity extrapolation model is set up by analyzing the thermal conductivity law of the blackbody cavity, and the method of separation of variables is used to solve the extrapolation model. The sensor can be used to measure the transient high surface temperature （3 005 ℃ ） by temperature extrapolation. Experimental verification of the extrapolation method is designed and completed. When a high power and high frequen- cy modulated CO21aser pulse is used as exciting source to heat the sensor to 1 500 ℃ , the measured time response of the sensor is on the order of 10-2 s. The sensor and a high-speed infrared thermometer are simultaneously used to measure the variations in temperature of the coatings inside and outside the black- body cavity by using CO2 laser step pulse. The result shows that the extrapolation model is valid.

关 键 词：仪器仪表技术 外推法 黑体腔 瞬态超高温 蓝宝石光纤温度传感器 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]