连续波多普勒雷达测量炮弹旋转速度的研究

Research on Rotating Speed of Cannonball by Using CW Doppler Radar

炮弹在雷达天线波束里飞行,回波信号包含多普勒信息。底部刻槽的炮弹由于自身旋转,对多普勒信号产生调制。分析了炮弹底部刻槽之后的RCS变化,并根据其周期性变化提取出调制信号,从而得到炮弹转速。给出了信号仿真和外场实验测试的结果,结果表明该方法有效实用。

Since cannonball travels in the antenna beam of the radar, its echo signal contains Doppler information. For a cannonball slotted on the bottom, its Doppler signal is modulated due to its self-rotation. The RCS change of a cannonball is analyzed and its rotation speed is then obtained via modulation signal acquired from the periodical change of RCS. Results from signal simulation and field experiment are also presented. The outcome indicates that this measure is effective and applicable.