Power Line Detection Method Based on Broadband Characteristics of FMCW Radar

Power lines are the biggest threat to helicopters flying at low altitudes, so the detection of power lines is of great significance to helicopter safety. This paper proposes a Bragg feature detection method for power lines based on broadband Bragg features. The method first obtains radar echo data through FMCW broadband data of power lines. Then, the FMCW data is segmented, radar echoes of different frequency bands are formed by distance FFT, and the characteristic points of the candidate power lines echoed in different frequency bands are accurately measured. Finally, through the angle changes of different frequencies, it is confirmed whether it is the Bragg point of the power line, and then the Bragg point characteristics of the power line are identified. This is conducive to solving the problem of false alarms and errors associated with power lines under complex conditions.