| 红外热波成像法测量固体材料热扩散率 |
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| 引用本文： | 朱德忠,何东明,郑明清,顾毓沁.红外热波成像法测量固体材料热扩散率[J].工程热物理学报,1996(4). |
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| 作者姓名： | 朱德忠 何东明 郑明清 顾毓沁 |
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| 作者单位： | 清华大学工程力学系 |
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| 摘 要： | 本文通过采用连续激光调制对试样周期加热产生稳定的温度波动和红外扫描动态测温的红外热波成像法获得温度波动的相位和幅值分布，测量固体材料热扩散率。介绍了红外热波成像法的测量原理和实验系统，推导了热扩散率测量的相位法、幅值法和相位－幅值复合法。对不锈钢和纯镍试样的热扩散率进行了测试。测量结果表明，该方法具有较高的精度。
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| 关 键 词： | 热波成像，红外扫描测温，热扩散率，相位—幅值复合法 |
MEASUREMENT OF THERMAL DIFFUSIVITY OF SOLID MATERIALS USING AN INFRARED THERMAL WAVE IMAGING METHOD |
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| ZHU Dezhong,HE Dongming,ZHENG Mingqing, GU Yuqin.MEASUREMENT OF THERMAL DIFFUSIVITY OF SOLID MATERIALS USING AN INFRARED THERMAL WAVE IMAGING METHOD[J].Journal of Engineering Thermophysics,1996(4). |
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| Authors: | ZHU Dezhong HE Dongming ZHENG Mingqing GU Yuqin |
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| Abstract: | An infrared thermal wave imaging technique is developed for measuring thermal diffusivity of thin plate solid materials.A chopped laser is applied as a periodic heat source to generate a temperattire wave in the sample.An infrared thermal video system is used to capture surface temperature oscillations of heat affected area.Phase method,relative amplitude method and combined method are deduced to evaluate thermal diffusivity.A stainless steel sample and a nickle sample are measured giving results agreed with available data book.The combined method has a high accuracy and can eliminate the heat loss of sample.Because of quasi-static process and non-contact transient measurement,the mothod is appropriate for varied solid materials. |
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| Keywords: | thermal wave imaging IR scanning thermal diffusivity phase-amplitude combined method |
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