Foreign matter detection system based on millimeter-wave radar

Abstract

The present invention discloses a foreign matter detection system based on a millimeter-wave radar. The system comprises: a millimeter-wave receiving and dispatching module, an antenna array module, adigital collection module and an image reconstruction module. The digital collection module receives signals output by the millimeter-wave receiving and dispatching module and processes the signals;and the image reconstruction module receives signals output by the digital collection module and performs rapid imaging processing to obtain real-time images of a detected scene. According to the scheme, the foreign matter detection system of the rapid and high-resolution millimeter-wave radar is developed, can be arranged at entrances of important places such as an airport, a wharf and the like for security check and can perform accurate detection of metal hazardous articles (such as cutters, guns and the like) and ceramic hazardous articles (such as explosive) hidden on people's bodies. Thereceiving and dispatching device of the millimeter-wave receiving and dispatching module, the switching group and the antenna array module are designed to allow the foreign matter detection system toachieve the optimal performances.

Description

technical field [0001] The invention relates to the field of security inspection systems, in particular to a millimeter-wave holographic monitoring radar system for security purposes to assist in the security inspection of concealed weapons. Background technique [0002] At present, conventional hidden weapon detection equipment in important places includes metal magnetic detectors (including detection rods and detection doors), and X-ray detectors. Among them, the metal magnetic detector can only detect metals, but cannot detect potential dangerous goods such as ceramic products or plastic explosives, so there is a great potential safety hazard; secondly, its working distance is short, and the person to be detected needs to be separated from the instrument. At a very short distance, this will bring uncomfortable feelings to the inspected; again, the metal detector simply detects metal objects, and cannot detect real dangerous metal objects (such as pistols, knives) and conv...

AI Technical Summary

Problems solved by technology

Among them, the metal magnetic detector can only detect metals, but cannot detect potential dangerous goods such as ceramic products or plastic explosives, so there is a great potential safety hazard; secondly, its working distance is short, and the person to be detected needs to be separated from the instrument. At a very short distance, this will bring uncomfortable feelings to the inspected; again, the metal detector simply detects metal objects, and cannot detect real dangerous metal objects (such as pistols, knives) and conventional metal objects (such as buttons). , trousers, coins, etc.), so there is a high probability of false alarm

Therefore, the security inspection efficiency using metal magnetic detectors is very low, and it is difficult to meet the needs of increasingly heavy security inspection tasks

X-ray detectors are currently mainly used to detect suitcases carried by passengers. Although low-power X-ray detectors for people's security checks have been developed and used in a small number of airports, due to the harmful effects of X-rays on the human body It is still difficult to be generally accepted by the public

Images