Radar information processing method for suppressing false alarm targets of wind turbine blades

Abstract

The invention belongs to the technical field of radar information processing, particularly relates to a radar information processing method used for restraining false-alarm objects of rotary blades of wind driven generators on the ground during areal detection of the radar. The radar information processing method includes the steps of 1, acquiring a pulse transmitting frequency of the radar, accumulating pulse counts, and calculating a Doppler frequency through a conjugated product vector; 2, determining a main clutter position on a Doppler spectrum according to the Doppler frequency of the main clutter; 3, acquiring angular spin rates and the largest strength of the rotary blades of the wind driven generators, and calculating width of spectrum filter corresponding to the tail ends of the rotary blades of the wind driven generators; 4, acquiring distance gate numbers and power of detecting points, average noise power of the frequency spectrum and semi-diameter of broadening of the main clutter, and according to the judged threshold coefficient, acquiring a two-value vector distribution of the signal local power, with the main clutter as the center and the spectrum broadening of the rotary blades as the semi-diameter, on a single distance gate; 5, judging and removing the false alarms.

Description

Technical field [0001] The invention belongs to the technical field of radar information processing, and in particular relates to a radar information processing method for false alarm targets of ground wind power generation rotor blades in the process of radar air-to-air downsight detection. Background technique [0002] Modern airborne pulse Doppler (PD) radars mainly use the mid-repetition frequency (MPRF) waveform operating mode when detecting targets in the air downwards. This mode adopts full-coherent PD processing, which can realize the detection and tracking of oncoming / tailing targets, and it can also complete the target monitoring in the whole airspace of up / down view, so it is widely used. [0003] The target detection of this mode is carried out on the two-dimensional "distance-frequency" plane, and the Doppler frequency difference generated between the target and the main clutter is mainly used to achieve frequency separation, so that the constant false alarm technology...

AI Technical Summary

Problems solved by technology

A ground wind farm generally has dozens or hundreds of independent wind power generation towers, and the blades of each independent wind power generation tower, rotating under the action of wind, may produce moving targets different from the main clutter Echoes: In the looking-down state, the radar antenna beam irradiates the wind farm on the ground. If the traditional constant false alarm technology is used, the echoes of the rotating blades of the wind power generation will be detected as a large number of false alarm targets in the air, thus affecting the detection performance of the radar and Normal use

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