| 一种考虑环境温度变化的制冷型红外系统外场标定方法 |
| 投稿时间：2024-10-31 修订日期：2024-11-08 点此下载全文 |
| 引用本文：甘世奇,张啸,吴统邦,马鑫,车勋,何明亮.一种考虑环境温度变化的制冷型红外系统外场标定方法[J].红外,2025,46(3):23~28 |
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| 基金项目:国家自然科学基金项目(5167506) |
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| 中文摘要:红外系统标定是开展目标红外特性测量的重要工作，其精度将直接影响最终测量结果的准确度。为了减小温度漂移对标定精度的影响，提出了一种考虑环境温度变化的制冷型红外系统外场标定方法，推导了考虑环境温度的像元灰度响应-目标辐射亮度关系式。通过某型国产制冷型红外系统的外场标定实验，验证了该方法的可行性和准确性。结果表明，与传统标定方法相比，本文方法对参与拟合的温度点反演的平均误差降低了0.57%、均方根误差降低了0.03，对延伸温度点反演的平均误差降低了1.63%、均方根误差降低了0.93，对于整个画幅标定精度更高。该方法可显著提升目标特性反演准确性，为开展红外系统标定的实际工程应用提供了有益的参考借鉴。 |
| 中文关键词:环境温度 制冷型红外系统 红外标定 温度漂移 红外特性测量 |
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| A Field Calibration Method for Refrigeration Infrared Systems Considering Ambient Temperature Changes |
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| Abstract:Infrared system calibration is an important task in measuring the infrared characteristics of targets, and its accuracy will directly affect the accuracy of the final measurement results. In order to reduce the influence of temperature drift on calibration accuracy, a field calibration method for refrigerated infrared systems considering ambient temperature changes is proposed, and the relation formula between pixel gray response and target radiance considering ambient temperature is derived. The feasibility and accuracy of this method are verified through field calibration experiments on a domestic cooled infrared system. The results show that compared with the traditional calibration method, the proposed method reduces the mean error of the inversion of the temperature points involved in the fitting by 0.57%, and the root mean square error by 0.03. For extended temperature points, the mean error of the inversion is reduced by 1.63%, and the root mean square error is reduced by 0.93. This method offers higher calibration accuracy across the entire frame and significantly improves the accuracy of target characteristic inversion, providing a useful reference for the practical engineering application of infrared system calibration. |
| keywords:ambient temperature cooled infrared system infrared calibration temperature drift infrared characteristic measurement |
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