Airport foreign object radar detection method based on time-direction statistics

A radar detection and foreign object technology, applied in the field of detection and identification, can solve the problems of inaccurate FOD detection, etc., and achieve the effect of reducing the impact of outstanding noise, increasing reliability and avoiding misjudgment

Active Publication Date: 2021-08-13
CHENGDU SINE SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of inaccurate FOD detection at present, and to provide a method for detecting foreign object radar at airports based on time-wise statistics

Method used

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  • Airport foreign object radar detection method based on time-direction statistics

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Embodiment

[0024] The airport foreign object radar detection method based on time-direction statistics in the embodiment of the present invention specifically includes the following steps:

[0025] Step 1. On the airport pavement without foreign matter, collect N times echo data of the radar scan for a single position unit, and obtain N sets of echo data of the position unit. A location unit is a block unit corresponding to the data collected by the radar, which is relatively small and can be regarded as a point.

[0026] Step 2. Perform statistics on the N groups of echo data to obtain the distribution mean, variance and probability density curve as the reference probability density curve.

[0027] Step 3. During detection, for a single-position unit, the echo data scanned by the radar at the current moment and the N-1 sets of echo data scanned at the previous moment are extracted in real time as the current N sets of echo data. In this way, it is equivalent to using a "sliding window"...

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Abstract

The invention relates to detection and identification technology. The present invention solves the problem of inaccurate FOD detection in the prior art, and provides a method for detecting foreign matter radar at airports based on time-wise statistics. The N sets of echo data of the position unit are statistically obtained to obtain the probability density curve, which is used as the reference probability density curve; during detection, for the single position unit, the echo data scanned by the radar at the current moment plus the echo data scanned at the previous time are extracted in real time N-1 sets of echo data are used as the current N sets of echo data, and the current probability density curve is obtained by statistics, and the current probability density curve is compared with the reference probability density curve. If the abscissa of the intersection point is greater than or equal to the preset gate If it exceeds the limit value, it is considered that there is foreign matter, otherwise it is considered that there is no foreign matter. The invention has the beneficial effects of increasing the reliability of statistical results and being suitable for radar detection of foreign objects in airports.

Description

technical field [0001] The invention relates to a detection and recognition technology, in particular to an airport FOD (Foreign Object Debris) detection technology based on the statistical characteristics of time-oriented data. Background technique [0002] Foreign objects appearing on the runway surface of the airport, called FOD, may cause various hazards from aircraft tire blowouts to crashes, and often even cause irreparable losses. Therefore, FOD detection at airports is a very meaningful research. [0003] FOD detection systems generally use radar monitoring, video image processing, digital signal processing and other technologies to achieve target detection, positioning and tracking. Collecting raw data used in testing is an important part of the FOD testing system. The traditional data acquisition methods of optical equipment to obtain optical images or video images are often highly sensitive to factors such as weather and light intensity, and the detection effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01V3/12
CPCG01S7/41G01V3/12
Inventor 罗旭吴义华周杨鹏林洪钢姚宗诚
Owner CHENGDU SINE SCI & TECH
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