| 基于红外热像图局部熵差的泄漏定位方法 |
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| 引用本文： | 葛楠,彭光正,姜牧舟.基于红外热像图局部熵差的泄漏定位方法[J].北京理工大学学报,2009,29(7):596-600. |
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| 作者姓名： | 葛楠 彭光正 姜牧舟 |
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| 作者单位： | 1. 北京理工大学,自动化学院,北京,100081
2. 美国罗彻斯特大学,电子和计算机工程系,纽约州,14627 |
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| 基金项目： | 国家"九八五"工程项目，日本SMC公司资助 |
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| 摘 要： | 对气体泄漏流动的温度特性进行研究,提出一种基于热像图局部熵差的密闭容器泄漏定位方法.通过带有压缩因子修正的焦耳-汤姆逊系数计算,推导泄漏节流温差,利用热成像方式采集充入冷却压缩空气前后的被测对象温度场,进而根据多帧红外图像的局部熵差确定泄漏位置.实验结果表明,熵差算法有效克服了诊断过程中被测对象的外形和表面缺陷干扰,能够高效、准确地实现泄漏点定位.
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| 关 键 词： | 泄漏定位 焦耳-汤姆逊效应 红外热像图 局部熵差 |
| 收稿时间： | 9/5/2008 12:00:00 AM |
Leak Localization Method Based on Infrared Thermography Using Local Entropy Difference Algorithm |
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| GE Nan,PENG Guang-zheng and JIANG Mu-zhou.Leak Localization Method Based on Infrared Thermography Using Local Entropy Difference Algorithm[J].Journal of Beijing Institute of Technology(Natural Science Edition),2009,29(7):596-600. |
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| Authors: | GE Nan PENG Guang-zheng and JIANG Mu-zhou |
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| Institution: | GE Nan1,PENG Guang-zheng1,JIANG Mu-zhou2(1.School of Automation,Beijing Institute of Technology,Beijing 100081,China,2.Department of Electrical , Computer Engineering,University of Rochester,NY 14627,USA) |
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| Abstract: | Investigates the temperature characteristic of air leak flow and a novel leak localization method is put forward based on local entropy difference.The temperature drop in leak throttling process is derived from the expression of Joule-Thomson coefficient,which is corrected by compressibility factor.Test object is charged with cryogenic compressed air and its temperature field is acquired by infrared thermography.Leak positions can then be identified by local entropy calculation among multi-frame infrared im... |
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| Keywords: | leak localization Joule-Thomson effect infrared thermography local entropy |
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