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Perimeter security radar transverse crossing target detection method and system, medium and equipment

A target detection and anti-radar technology, which is used in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation. Vegetation target distinction and other issues, to achieve the effects of vegetation clutter suppression, increasing array size, and improving signal-to-noise ratio

Pending Publication Date: 2020-10-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] In addition, due to cost constraints, the size of the array antenna is generally not large. For example, the commonly used ones are 1 transmission 2 receptions or 1 transmission 4 receptions, that is, the receiving end has only 2 or 4 array elements. The passing human targets cannot be effectively detected, nor can the human targets and vegetation targets be effectively distinguished

Method used

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  • Perimeter security radar transverse crossing target detection method and system, medium and equipment
  • Perimeter security radar transverse crossing target detection method and system, medium and equipment
  • Perimeter security radar transverse crossing target detection method and system, medium and equipment

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Now let’s explain the working principle of millimeter wave radar:

[0051]The millimeter-wave radar emits multiple cycles of frequency modulation continuous wave (FMCW, Frequency Modulation Continuous Wave) signals, and each sweep cycle is T chirp , can simultaneously measure the distance and radial velocity for each target in a multi-target scene, and the transmitted waveform is as follows image 3 shown.

[0052] Among them, the pulse repetition period is an important parameter, a short-term T chirp The signal frequency f of the echo signal after de-slope B is a negative frequency. After the echo signal is mixed, the baseband signal can measure the difference frequency signal f through FFT B . The target distance R can be obtained by the difference frequency signal f B and the relative delay τ, the target distance R is:

[0053...

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Abstract

The invention discloses a perimeter security radar transverse crossing target detection method and system, a medium and equipment, which belong to the technical field of radar detection, and are usedfor solving the technical problem that the existing perimeter security radar cannot effectively detect a transverse crossing target. The method comprises the steps of 1) obtaining an angle-Doppler matrix of each array element in a current coherent processing interval; 2) according to the angle-Doppler matrix, calculating a radial speed estimation value and a target angle estimation value of the target; 3) constructing a virtual array according to the radial speed estimation value and the target angle estimation value of the target, and 4) performing target detection on the virtual array. The method has the advantages that the transverse crossing target is effectively and accurately detected, vegetation clutters can be effectively suppressed, and the like.

Description

technical field [0001] The present invention mainly relates to the technical field of radar detection, in particular to a method, system, medium and equipment for detecting a perimeter security radar laterally passing through a target. Background technique [0002] Security radar is a hot research direction in the field of security at home and abroad. With the continuous advancement of science and technology and the continuous improvement of criminal methods, traditional security methods have shown many disadvantages in the security field of perimeter areas, and cannot provide solid protection. For example, active infrared detectors cannot distinguish small animals from fakes such as falling leaves. target, and it cannot realize surface monitoring, and is not suitable for the overall space deployment type; passive infrared detectors can only identify targets that have a temperature difference from the surroundings. It will drop, or even temporarily fail; leaking cables / vibr...

Claims

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Application Information

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IPC IPC(8): G01S13/72G01S13/04G01S7/40G01S7/41G01S7/36
CPCG01S13/726G01S13/04G01S7/4056G01S7/414G01S7/36
Inventor 张伟刘硕王平何宁宇谭梦瑶
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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