超声波人工造雾在大面积无源干扰技术中的应用试验

Application experiment of making artificial fog by ultrasonic with passive jamming method

针对当前光电无源干扰烟幕在"大面积、长留空、全方位遮蔽"等方面的不足,提出超声波造雾大面积无源干扰新技术。分析了造雾液的配方组成、温度、湿度、外加气流等对超声波成雾效果的影响。试验表明,含吸湿性高效催化剂和有机物组分的造雾液成雾效果良好,其中高效催化剂A浓度为5%、有机物G为3%。在低温和高湿度条件下成雾性能更为突出。通过添加辅助气流的方式可加快成雾速度和改进成雾效果,比较超声波造雾前后的红外热图像发现:人体和人脸等可在造雾15min后降低10～15℃,表明超声波人造雾可明显降低目标的热红外特征。

There are some technical difficult problems for smoking screen. Aiming at antagonizing space and aviation detection by foreign army and securing the important cosmically operation, A new passive jamming method which is able to produce fog by ultrasonic has been put forward. In this paper, the new means of making artificial fog by ultrasonic vibrating fog fluid was researched. By changing the component and concentration of the fog fluid, the prescription was optimized. The influences of temperature, relative humidity and air current on the fog performance were also analyzed. The results show that the fog fluids made up of hygroscopic catalyzer and organic solution have good fog performance. The concentration of catalyzer A is 5%, and the concentration of organism G is 3%. It is found that the artificial fog become denser under high relative humidity and low temperature. The utilization of assistant air stream can effectively decrease the time of fog formation and improve the visibility. By comparing the IR images made after making fog with those made before making fog, the results show that the temperature of people face and body reduces 10-15℃ after 15 minutes of making fog. It is proved that the artificial fog can weaken the IR characteristic of the target.