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红外辐射测量系统的宽动态范围定标通常是在多个温度点下,设置多个积分时间并适当加入衰减片的方式实现的。其不仅效率低、耗时长、成本高且影响整个红外辐射测量系统实时性和机动性。对此,在考虑积分时间的定标模型基础上,提出宽动态范围快速定标方法。只需调节一次积分时间和一次温度即得到宽动态范围任意积分时间的定标方程。利用Φ400 mm红外辐射测量系统对快速定标方法的定标精度、测量精度进行验证。实验结果表明:快速定标方法与直接定标结果之间最大误差为2.75%,该方法外场测量时最大辐射测量误差为11.69%,相比传统辐射测量最大误差不超过1.52%。说明快速定标方法能有效地保证系统辐射定标精度,提高辐射测量系统的定标效率,缩短定标时间,实现对系统宽动态范围任意积分时间的定标。整个辐射测量过程实时性好,操作简单、易实现且可靠性高,适应针对外场条件下红外辐射特性测量系统的要求,外场测量结果也说明快速定标可以直接应用于靶场目标的红外辐射测量任务中。
Wide dynamic range calibration of infrared radiation measurement system is usually achieved at multiple temperature points, set a number of integration time and the appropriate attenuation plate. It is not only inefficient, time-consuming, high cost and affect the real-time and mobility of the entire infrared radiation measurement system. In this regard, based on the calibration model of integration time, a fast calibration method for wide dynamic range is proposed. Just adjust the integration time and temperature once to get a wide dynamic range of any integral time calibration equation. The use of Φ400 mm infrared radiation measurement system for rapid calibration method of calibration accuracy, measurement accuracy verification. The experimental results show that the maximum error between the fast calibration method and the direct calibration result is 2.75%. The maximum radiation measurement error in field measurement is 11.69%, which is 1.52% less than the maximum error of traditional radiation measurement. It shows that the fast calibration method can effectively guarantee the calibration accuracy of the system radiation, improve the calibration efficiency of the radiation measurement system, shorten the calibration time and realize the calibration of any integration time of the wide dynamic range of the system. The whole radiation measurement process has good real-time performance, simple operation, easy implementation and high reliability, and is suitable for the requirement of the infrared radiation measurement system under external conditions. The field measurement also shows that the rapid calibration can be directly applied to the infrared radiation measurement tasks in.