【作者】 李照洲； 郑小兵； 吴浩宇； 王乐意； 乔延利；

【Author】 LI Zhao-zhou, ZHENG Xiao-bing, WU Hao-yu, WANG Le-yi, QIAO Yan-li(Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Hefei 230031, China)

【机构】 中国科学院安徽光机所通用光学辐射定标和表征技术国防科技创新实验室；

【摘要】 随着多波段、多平台、高光谱分辨率遥感仪器的迅速发展,要求光谱辐射定标技术具有前所未有的高精度和长期测量的稳定性。光谱辐亮度标准探测器是基于探测器的新一代高精度辐射定标方法中的核心仪器,它在遥感仪器中(野外、机载和星上高精度辐射定标)具有广阔的应用前景。温度变化是工程应用中影响辐亮度标准探测器绝对精度和稳定性的一项关键因素。设计了一种基于PID(比例-积分-微分)和Bang-Bang控制相结合的智能温控算法的主动式精密温控系统。该温控系统既可通过整机面板上的键盘设定其恒温值后独立运行,也可选用RS232C串口方式,通过上位PC机远程控制来实现温度的实时测量和分析。实验结果表明,在半小时内达到热平衡后,光谱辐亮度标准探测器的温度变化小于0.1℃,从而使标准探测器在温度起伏较大的环境中使用时,其高精度优势也能得以保持,达到了预期的设计目的。更多还原

【Abstract】 With the development of multi-spectrum, multi-platform and high-resolution response remote detectors, the radiometric calibration technology is demanded to reach an entirely new level in the precision and long-term stability. Spectral radiance standard detector is a key unit of the new high-accuracy radiometric calibration technology based on detector, and has potential applications in radiometric calibration of field, air-borne and space-borne sensors. The temperature change of spectral radiance standard detector is a primary factor of affecting its precision and stability. A high-accuracy temperature controlling devices based on PID arithmetic were designed, which could run by itself or by remote control with personal computer (PC) through RS232C. The spectral radiance standard detector was stabilized at the set temperature point within 0.5h and the fluctuation was less than 0.1℃. The results make the spectral radiance standard detector enable to work with high precision under various temperature environments.更多还原