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| 双波长图像测温方法影响因素实验研究 |
| Exploring the influencing factors of dual wavelength image temperature measurement method |
| 投稿时间：2024-07-18 |
| DOI：10.3969/j.issn.1005-5630.202407180082 |
| 中文关键词: 温度测量 光学辐射测温方法 双波长法 辐射图像法 影响因素 |
| 英文关键词:temperature measurement optical radiation temperature measurement method dual wavelength method radiation imaging method influence factor |
| 基金项目:国家自然科学基金青年项目（51806144） |
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| 中文摘要: |
| 针对双波长图像测温方法的影响因素研究，通过理论分析优选680 nm、760 nm双波长，搭建了标准高温黑体辐射的双波长图像测温系统开展实验研究。通过设定不同的温度对标准黑体进行双波长辐射图像测量，基于热辐射定律建立了温度反演算法，实现了温度测量相对偏差与不确定度评价。在此基础上，开展曝光时间、成像距离与增益等影响因素实验研究，结果显示：不同曝光时间及成像距离下，双波长辐射强度变化规律一致；双波长测温法可通过双波长强度比值消除曝光时间及成像距离对测温结果的影响，测量相对偏差均在3.5%以内。不同增益下，双波长辐射强度增长符合指数规律，需对增益强度进行校正，回归到无增益状态下的强度值后再进行处理，以消除增益响应规律对温度测量结果的影响，增益校正后测温相对偏差仍在3%以内。上述研究为双波长图像测温方法的测温精度提升及工业应用提供参考。 |
| 英文摘要: |
| A study on the influencing factors of dual wavelength image temperature measurement method was conducted. Through theoretical analysis, a standard high-temperature blackbody radiation dual wavelength image temperature measurement system was built by selecting 680 nm and 760 nm dual wavelengths. Different temperatures were set to measure the standard blackbody radiation dual wavelength image. Based on the law of thermal radiation, a temperature inversion algorithm was established to evaluate the relative deviation and uncertainty of temperature measurement. On this basis, experimental research was conducted on the influencing factors such as exposure time, imaging distance, and gain. The results showed that the variation law of dual wavelength radiation intensity was consistent under different exposure times and imaging distances. The dual wavelength temperature measurement method can eliminate the influence of exposure time and imaging distance on the temperature measurement results through the ratio of dual-wavelength intensity, and the relative deviation of the measurement is within 3.5%; The growth of dual wavelength radiation intensity under different gains follows an exponential law, and it is necessary to correct the gain intensity and regress it to the non gain intensity value for processing, in order to eliminate the influence of the gain response law on temperature measurement results. The relative deviation of gain corrected temperature measurement is still within 3%. The research provides reference for the exploration of temperature measurement accuracy and industrial application of dual wavelength image temperature measurement method. |
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