| 基于多光谱技术同时测量超高温材料的温度和热扩散率 |
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| 引用本文： | 辛春锁,张虎,戴景民,何小瓦,汪子君.基于多光谱技术同时测量超高温材料的温度和热扩散率[J].吉林大学学报(工学版),2009(Z1). |
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| 作者姓名： | 辛春锁 张虎 戴景民 何小瓦 汪子君 |
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| 作者单位： | 哈尔滨工业大学自动检测与过程控制系统研究所;航天材料及工艺研究所; |
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| 基金项目： | 总装备部基金项目(51312060201) |
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| 摘 要： | 采用传感器复用技术对超高温试样的温度及热扩散率进行精确测量。根据比色温度计测量原理,推导了计算被测物体表面温度的通用计算公式,讨论了将高温非金属材料视为灰体的可行性,探讨了采用两个探测器分别对两个温度区间的温差信号进行测量的方法,设计了利用传感器输出信号同时对温度和温差进行测量的高精密放大电路,并介绍了相应装置的研制情况。标定结果表明,这套高温计的测量范围为1073~3773 K,测试误差小于1%。对SRM 8424标准试样在1073~3273 K温度范围内的热扩散率进行了测量,与NIST的测量数据(1073~2673 K)相比,最大测试误差为4.34%。本研究结果实现了对超高温材料温度和热扩散率的同时测量,为该领域测量装置的研制提供了一个新思路。
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| 关 键 词： | 仪器仪表技术 多光谱技术 热扩散率 激光脉冲法 高温 |
Simultaneous temperature and thermal diffusivity measurement of ultra-high temperature material based on multi-spectral technique |
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| XIN Chun-suo,ZHANG Hu,DAI Jing-min,HE Xiao-wa,WANG Zi-jun.Simultaneous temperature and thermal diffusivity measurement of ultra-high temperature material based on multi-spectral technique[J].Journal of Jilin University:Eng and Technol Ed,2009(Z1). |
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| Authors: | XIN Chun-suo ZHANG Hu DAI Jing-min HE Xiao-wa WANG Zi-jun |
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| Affiliation: | 1.Department of Automation Measurement and Control;Harbin Institute of Technology;Harbin 150001;China;2.Aerospace Research Institute of Materials and Processing Technology;Beijing 100076;China |
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| Abstract: | In order to measure the temperature and the thermal diffusivity of ultra-high temperature material precisely and simultaneously,the combination of multi-wavelength technique and laser pulse method was studied.Based on the principles of thermal radiation and temperature measurement with color pyrometer,a general formula for computing the true surface temperature of objects was developed.The feasibility of using nonmetal material as grey body was discussed mainly,the method of measuring temperature difference... |
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| Keywords: | technology of instrument and meter multi-wavelength technique thermal diffusivity laser flash method high temperature |
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