Airport runway foreign object debris detection radar signal preprocessing method

A radar signal and foreign object detection technology, which is applied in the direction of measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve problems such as inability to achieve long-distance correction, improve target detection accuracy and synthetic aperture imaging resolution Higher rate, avoid image distortion, remove effect of blurring effect

Active Publication Date: 2017-06-09
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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But this method is only suitable for short-distance c

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  • Airport runway foreign object debris detection radar signal preprocessing method
  • Airport runway foreign object debris detection radar signal preprocessing method
  • Airport runway foreign object debris detection radar signal preprocessing method

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[0046] In order to explain the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0047] Such as figure 2 As shown, the method for preprocessing radar signals for detecting foreign objects on airport runways disclosed in the present invention includes the following steps:

[0048] S1. Establish a signal model of the ideal intermediate frequency signal obtained by mixing the ideal target echo signal, and introduce the phase error function and the exponential function of the phase error to establish the measured intermediate frequency obtained by mixing the target echo signal with frequency offset Signal model of the signal;

[0049...

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Abstract

The invention discloses an airport runway foreign object debris detection radar signal preprocessing method. The airport runway foreign object debris detection radar signal preprocessing method comprises steps that S1, a signal model of an ideal medium frequency signal is established, and the signal model of the measured medium frequency signal is established by introducing a phase error function and a phase error exponential function; S2, a phase error function value is calculated according to the medium frequency signal phase error, and the phase error exponential function is acquired according to the phase error function value; S3, the medium frequency signal after radar transmitting signal non-linear correction is calculated according to the signal model of the measured medium frequency signal and the exponential function value of the phase error function; S4, the matched filtering of the medium frequency signal after the radar transmitting signal non-linear correction and the phase error exponential function value in a range frequency domain is carried out; S5, the medium frequency signal after frequency deviation correction is calculated according to the medium frequency signal after the matched filtering and the phase error exponential function value. The frequency deviation existing in linear frequency modulation signals is corrected.

Description

technical field [0001] The invention relates to the technical field of airport security protection. More specifically, it relates to a radar signal preprocessing method for foreign object detection on an airport runway. Background technique [0002] Foreign Object Debris (FOD) on the airport runway refers to some foreign matter, debris or object that may damage the aircraft, such as metal parts, gravel, paper scraps, leaves, etc. FOD seriously affects the safety of aircraft. According to conservative estimates, the annual global loss caused by FOD is about 3-4 billion US dollars. In recent years, with the continuous development of civil aviation, the automatic monitoring of FOD has also attracted worldwide attention. [0003] Currently existing FOD monitoring systems, such as Tarsier in the United Kingdom, FODetect in Israel, and FODFinder in the United States, mainly use millimeter-wave radar or millimeter-wave radar / optical composite mode. Millimeter wave radar has the ...

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Application Information

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IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/411G01S13/904G01S13/9027
Inventor 张鹏郭洧华张璐费鹏温鑫
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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