目标辐射特性现场校准用大面积黑体辐射源技术研究

Research on technology of large area blackbody radiation source used in field calibration for target radiation characteristics

红外成像技术在空间探测、对地观测、安防监控等领域的应用越来越广,为了确保红外目标识别的准确性,必须掌握目标的辐射特性。目标辐射特性需要在外场实际条件下测量得到,需要利用大面积黑体辐射源对目标特性测量设备进行现场辐射参数校准。设计了一种大面积黑体辐射源,辐射体采用铝材质并发黑处理,大面积黑体辐射源温度控制采用PID控制算法。在外场实际环境温度为26.8℃,湿度为60%时对目标特性测量设备辐射参数进行了校准。试验数据表明:辐射温度测量不确定度为0.4℃(k=2),取得了较好的应用效果。

Nowadays,the infrared imaging technology is widely used in space detection,land inspection,security monitoring and other fields.In order to ensure the accuracy of the infrared target recognition,it is necessary to completely understand the radiation characteristics of the target.The target radiation characteristics need to be measured in out-field condition,and the large area blackbody radiation source need to be used for field radiation parameters calibration to the measuring equipment of target characteristics.A large area blackbody radiation source was designed.The radiator was made of aluminum material with black treatment,and the proportion integral differential(PID)control algorithm was adopted by the temperature control of large area blackbody radiation source.When the actual ambient temperature was 26.8℃and the humidity was 60%,the radiation parameters of the target characteristics measuring equipment were calibrated.The test data show that the uncertainty of the radiation temperature measurement is 0.4℃(k=2),and good application effect is achieved.