近红外光谱成像系统在液体安检中的应用

易燃易爆液体的实时、远程和动态探测对于保障公共安全具有重要意义，在公安、民航和海关等领域应用前景广阔。研制了基于液晶可调滤光片的近红外光谱成像系统，通过波长优选算法大幅降低了光谱通道数，有效提高了扫描成像速度和数据处理速度，可实现对低速运动的液体危险品的远程和实时检测。利用该系统开展了不同环境下对易燃易爆液体的检测实验，结果表明该系统对静态目标检测精度为100%，对速度小于0.2 m/s的运动目标检测精度高于95%。

Near infrared multi-spectral imaging system for flammable liquid detection

The flammable liquid detection, especially the emote flammable liquid dynamic monitoring, is of great importance to public security, customs and civil aviation. Hence, a near infrared (NIR) multi-spectral imaging system based on liquid crystal tunable filter was developed. To increase the speed of scanning imaging and data processing, the number of spectral channel was reduced remarkably by band selection method. The experiment of flammable liquid detection by the system was carried out in different environments, and the result show that the detection accuracy of the system is 100% when the object was motionless, and it is more than 95% when the movement speed of object was less than 0.2 m/s.