毫米波无人直升机避障雷达系统研究

Research on Key Millieter-Wave Obstacle Avoidance Radar System of Unmanned Helicopter

摘要:

由电力线所引起的无人直升机事故频频发生,因而确保无人机飞行安全一个很重要的方面就是对电力线的检测。文章采用毫米波宽带线性调频技术实现了对高压线小目标的探测分辨,研制了毫米波无人直升机避障雷达系统,解决了无人机低空巡线飞行的安全问题。通过实际挂飞试验说明,该系统可靠有效,满足装备要求。

Abstract:

To ensure the safety of helicopters, a lot of researches have been conducted in millimeter-wave radar collisionavoidance system. An important and difficult part in the radar system is to detect the high-voltage power lines as the powerline itself is very difficult to be detected and lots of helicopter crash accidents are caused by power lines. In the power lineinspection system, obstacle avoidance is an urgent problem needed to solve when the unmanned helicopter flies at low alti.tude which threats the flying safety with complex background. Aiming at this problem in this paper, a high-voltage powerline detection scheme was presented, using millimeter-wave (MMW) linear frequency modulated (LFM) signal. Based onthe theoretical analysis and the system simulation, the radar system of obstacle detection was developed. The flight test re.sults showed that this method was effective and reliable.