毫米波引信多普勒信号测试系统研究

A Test System for Doppler Signal of Millimeter Wave Fuse

针对毫米波引信对地探测多普勒信号的测试需求,设计了以单片机(MCU),CPLD,FLASH存储器为核心器件的测试系统,完成了弹载实测试验.分别获取了18 km和10 km末弹道的多普勒信号,绘出了距地不同高度多普勒信号的变化曲线,得出了多普勒信号不是规则的连续增幅信号而是波动增幅信号的结论.通过频谱分析,得到了18 km和10 km末弹道的多普勒频率分别为70 kHz和89 kHz,为引信信号处理电路的设计提供了依据.

With a MCU, a CPLD, and a FLASH memory as key components, a test system was designed for Doppler signal measurement of the millimeter wave fuse. The test system has been successfully applied to the experiments on boom, and recorded the Doppler signals of the terminal trajectory with the distance of 18 km and 10km respectively. According to the recorded curves, it can be concluded that the obtained Doppler signal is not a regular continuous amplitude-increasing signal but a fluctuant ampli- tude-increasing signal. By means of spectrum analysis, the main frequency of the Doppler signal is 70 kHz/89 kHz at each terminal trajectory （18 km/10 km）. The analysis results can provide scientific basis for the design of the signal processing circuit on fuse.