一种物体比辐射率测量的四次测量法及增温补偿
投稿时间:2017-06-11  最后修改时间:2017-07-21  点此下载全文
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作者单位E-mail
张仁华 中国科学院地理科学与资源研究所 zhangrh@igsnrr.ac.cn 
米素娟 中国交通通信信息中心 misujuan871001@163.com 
田静 中国科学院地理科学与资源研究所  
郝贵斌 中国科学院地理科学与资源研究所  
刘素华 中国科学院地理科学与资源研究所  
苏红波 中国科学院地理科学与资源研究所  
李召良 中国科学院地理科学与资源研究所  
基金项目:国家基础发展规划项目(973项目2013CB733406),国家(41271380, 41571356 ,41171286)的资助FoundationitemsSupported by the National Basic Research Program of China (973 Program2013CB733406), the National Natural Science Foundation of China (41271380, 41571356,41171286)
中文摘要:本文提出了一种物体比辐射率测量的二次照度四次测量法设计方案,其中二次热辐射源辐照度和二次被测目标热出辐射度均是用置于相同位置的镀金板测量它们的反射值而获取的。这种设计优点是能够测量到与实际照射到被测目标完全一致的热辐射源辐照度,从而能够以二次热辐射照度的相减算法排除传感器镜头、腔壁等热辐射的干扰。不仅提高了测量精度,而且可以设计成小尺寸便携式的比辐射率测定仪。由于设计了1000w/m2以上的强热辐射源,导致比辐射率测量值因被测目标、镀金板的增温而影响不大,可以不进行增温补偿。运用1000w/m2以上的强热辐射源照射源的另一优点,可以使得温度传感器的测量误差和随机噪音对于比辐射率测量的精度的影响无足轻重。为了使本设计和方法的能够普适于冷热辐射源间隔更长时间的红外波谱辐射仪,并使四次测量法方法更加严谨,提出了比辐射率测量的普适表达式,并提出了一种“过程法”的增温补偿方法供读者参考。消除热红外遥感工作者长期以来在非同温系统中温度变化造成比辐射率测量误差的担忧。通过对比三种比辐射率测量方法得到的四种物体的比辐射率测量结果表明,本文提出的方法优于其它两种方法。
中文关键词:比辐射率  二次照度四次测量法  增温补偿  比辐射率测量的普适表达式;过程法
 
A new method on estimating object emissivity by using four times measuring and principle of temperature compensation
Abstract:This paper proposed a new method named “Two Times Thermal Illumination and Four Times Measuring Method“ to estimate object emissivity, which used a gold-plated cube cavity to measure the reflectance of objects in two times thermal illumination and two times thermal illumination measuring. The advantage of this method is that the values of measured thermal illumination are equal to the values Illuminated on objects and also this method can reduce the interference from the thermal illumination of the sensor and the cavity. By this method, the accuracy of emissivity instruments can be improved and also the instrument can be made more portable. From experiments of several samples, we get that when the environmental radiation thermal illumination is larger than 1000 W/M2,temperature compensation can be omitted for the estimated emissivity changed gradually. In order to be used in other occasion for hot and cold illumination switching which take longer time than infrared radiation thermometer, we proposed a new way named “Processed Method” to compensate temperatures in this paper. Generally, the Two Times Thermal Illumination and Four Times Measuring Method is useful for the researchers who suffered from the estimating emissivity errors because of the object temperature change in Non-isothermal system. Comparison of the three emissivity measurement methods of the four objects shows that the method proposed in this paper is the best.
keywords:Emissivity  Two Times Radiation and Four Times Observing Method  Temperature Compensation  A General Expression of Emissivity Measurements  Processed Method
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