Foreign body detection system for airfield runway

Abstract

The invention discloses a foreign body detection system for an airfield runway. The system consists of a radar transmission and receiving antenna, a radar transceiver front-end, a cantilever, a rotating mechanism, a signal processor and a display control terminal, wherein the radar transmission and receiving antenna is connected with the radar transceiver front-end through a waveguide; the radar transceiver front-end is connected with the signal processor through the rotating mechanism; and the signal processor is connected with the display control terminal. For a linear frequency modulation continuous wave system, a high range resolution is obtained by wideband linear frequency modulation, and a synthetic aperture is constructed by the rotation of the antenna along a semicircular trajectory, so that a high azimuth resolution is obtained, the area of a ground clutter unit is reduced, and a small fragment target on the runway can be detected.

Description

Technical field: [0001] The invention belongs to the field of airport safety detection, and in particular relates to an airport runway foreign object detection system. The system mainly uses a synthetic aperture continuous wave FM radar display with a rotating antenna to realize high-resolution detection of airport runway surface targets and reduce ground noise. wave interference. Background technique: [0002] The automatic detection of foreign debris on the surface of the airport runway is an important issue related to aviation safety. When the aircraft is taxiing on the runway at high speed, the debris on the runway is a serious threat to the safety of the aircraft and the surrounding personnel and vehicles. It is estimated that the accidents caused by the runway debris cause the aviation industry to lose 4 billion US dollars every year. Generally, the radar cross-sectional area of ​​small-sized debris is only -20dBm 2 Below, these small objects are stationary on the ru...

AI Technical Summary

Problems solved by technology

If the resolution of the radar in terms of distance and azimuth is not high enough, then the area of ​​the ground clutter unit is large, and its echo strength may be much stronger than that of the debris echo to be detected, and the method of moving target detection cannot be used to eliminate ground clutter. stray echo

At present, the methods adopted in foreign countries are optical imaging method and 3mm band radar detection method. The optical detection method is greatly affected by the interference of light, shadow, paper scraps and other factors, while the 3mm band radar is expensive and the maintenance cost is high.

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