Hidden hazardous material detecting method based on video SAR

Abstract

The invention discloses a hidden hazardous material detecting method based on video SAR. According to the hidden hazardous material detecting method, an arc-shaped rail is arranged above a security checking area, and a plurality of radars with same working frequency in an SAR working mode are arranged on the rails; and in operation of the radars, the radars perform uniform-speed reciprocation along the arc-shaped rail and transmit a linear frequency modulation continuous terahertz wave, thereby forming an azimuth synthetic aperture image and obtaining a detected image of an object in the security checking area. According to the hidden hazardous material detecting method, the azimuth synthetic aperture image which is formed in uniform-speed motion of the radars in the arc-shaped rail is utilized for realizing long-distance real-time omnidirectional high-resolution image of the object in the security checking area, and furthermore quick imaging is performed through transmitting an electromagnetic wave with an ultrahigh frequency or higher frequency for preventing defocusing caused by object motion.

Description

technical field [0001] The invention belongs to the technical field of electronic signal processing, in particular to a video SAR-based detection method for concealed dangerous goods. Background technique [0002] Traditional security detection systems (metal detectors and X-ray scanners) have certain limitations in terms of human body safety and perspective imaging. At present, the technologies that have been applied to security inspection mainly include: X-ray, infrared, instrument, ultra-wideband and sound wave and other technologies. Although these technologies have their applicable occasions and characteristics, they all have certain defects for detecting people with concealed objects. For example, X-rays have the advantage of high-resolution imaging, but strong radiation will cause harm to human health and cannot be directly used for human detection. Infrared technology to detect hidden objects depends on the temperature difference between the hidden object and its b...

AI Technical Summary

Problems solved by technology

For example, X-rays have the advantages of high-resolution imaging, but strong radiation will cause harm to human health and cannot be directly used for human detection

The detection of hidden objects by infrared technology depends on the temperature difference between the hidden object and its background. Its resolution is not strong, and its penetration is weak, so it cannot find hidden prohibited items.

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