An automatic target detection algorithm based on millimeter wave/terahertz wave radiation
An automatic detection and millimeter-wave technology, which is applied in optical-based geological detection, geological detection using millimeter-wave, measurement devices, etc., can solve the problem of easy loss of high-frequency components of signals, low resolution of radiation systems, and effects affected by noise, etc. problems, to achieve the effect of automatic detection, comprehensive signal collection, and accurate detection results
Active Publication Date: 2021-08-17
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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However, due to the limitation of the aperture of the detector antenna of the system, the resolution of the radiation system is low, and the high-frequency components of the signal are easily lost, and the effect is seriously affected by noise.
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[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.
[0080] The present invention provides an automatic target detection algorithm based on millimeter wave / terahertz wave radiation, and the specific embodiments are as follows:
[0081] When the millimeter wave / terahertz radiometer is used for target detection, the system schematic diagram is as follows figure 1 As shown, it mainly includes a terahertz radiometer array (the antenna is integrated inside the radiometer), a three-dimensional precision console, data acquisition equipment, signal processing equipment and display equipment.
[0082] The radiometer array used in the present invention is a W-band radiometer, and there are 9 radiation modules in total. A single radiation module has 4 radiation channels, and there are 36 radiation channels in total. The radiometer works i...
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The invention discloses an automatic target detection algorithm based on millimeter wave / terahertz wave radiation, which includes the following process: using the millimeter wave / terahertz wave radiometer array to collect data of target radiation signals; performing background estimation on the environment where the target is located , and perform background suppression; signal enhancement is performed on the background suppressed data to obtain a signal matrix; the warpage and standard deviation characteristics of each column of the enhanced signal matrix are analyzed, and the mixed characteristics of the target radiation signal are constructed on this basis Spectrum, that is, the warp spectrum based on the standard deviation, and time-frequency analysis is performed on it to obtain the mixed time-frequency characteristic spectrum of the target radiation signal; the mixed time-frequency characteristic spectrum is optimized and extracted by using a five-layer convolutional neural network, and the The Softmax algorithm realizes the automatic detection of the target, and the algorithm disclosed by the invention can significantly improve the signal-to-noise ratio and realize accurate identification of the target.
Description
technical field [0001] The invention relates to the field of automatic target detection, in particular to an automatic target detection algorithm based on millimeter wave / terahertz wave radiation. Background technique [0002] Millimeter wave / terahertz wave has a strong ability to penetrate fog, rain, smoke and dust, and it can still work normally around the clock in harsh weather environments. In view of the unique advantages of millimeter wave / terahertz wave, it has been widely used in security inspection, communication, remote sensing, military and other fields. Among the many applications of millimeter wave / terahertz wave, millimeter wave / terahertz wave imaging is considered to be the most promising application technology, and it is becoming more and more important in security checks, aircraft landing and collision avoidance systems. role. [0003] Target detection methods usually include two typical means, active and passive. The active type refers to the use of a sp...
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IPC IPC(8): G01V8/00G01V8/10G06N3/04
CPCG01V8/005G01V8/10G06N3/045
Inventor 梁晓林邓建钦王明超辛海鸣
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP