A three-dimensional scanning device and security inspection equipment

Abstract

The invention provides a three-dimensional scanning device and security inspection equipment. A rotating shaft capable of rotating relative to a scanning platform is vertically arranged on the scanning platform; the scanning device is arranged on the rotating shaft; the rotating shaft drives the scanning device on the rotating shaft to perform three-dimensional scanning operation on the object tobe scanned facing the scanning platform in the rotating process, and the three-dimensional scanning operation on the object to be scanned is quickly realized by using a simple structure, so that quickthree-dimensional imaging is realized, and the security check efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the field of scanning, in particular to a three-dimensional scanning device and security inspection equipment. Background technique [0002] With the sharp increase in the flow of people in large public places and the demand for public security, the demand for human security checks is increasing. However, at present, the security detection methods widely used in public places such as airports and stations are mainly metal detectors, ion spectrometers and X-ray detectors. Metal detectors can only detect metal objects carried by the human body. Ion spectrometers are mainly used to detect whether the human body carries explosives. X-ray detectors are mainly used to detect carry-on luggage and items, and cannot detect human bodies. Therefore, in order to ensure the reliability of the security check, it is usually necessary to detect the human body and the articles separately, so that each person who passes the security check needs...

AI Technical Summary

Problems solved by technology

The terahertz security imaging system is divided into passive imaging and active imaging. Passive imaging relies on the weak terahertz waves generated by the human body for imaging and security inspection. It does not need an external terahertz radiation source to irradiate the human body. relatively slow

The active imaging process is that the terahertz radiation emitted by the security inspection system is irradiated on the target, and the target reflects the terahertz wave signal containing its own amplitude and phase back to the security inspection system, and converts it into an electrical signal to form a terahertz reflection image of the target. Shape and gray value to extract the characteristic information of the target, but because there are only single-point transmitters and receivers, only one point of the target plane can be measured at a time, and two-dimensional mechanical scanning must be performed to obtain an image, and the structure is very complicated. And the imaging time is also long, it is difficult to achieve practical

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