The inspection of “Green Pass Vehicles” has always been a major problem in the management of expressway green passages. Because of the traditional methods such as manual spot checks, there are various problems and the inspection requirements for “Green Pass Vehicles” cannot be implemented. The success of the radiation perspective imaging green pass detection device has been successfully solved and this problem has been properly solved.

It is reported that radiation radiography imaging detection technology has been widely used for many years in customs and ports, and is mainly used in the field of anti-terrorism and anti-terrorism. Using the principle of radiography, the fan-shaped rays emitted by the ray source penetrate the closed cabin and the internal cargo and are received by the other side detector. Because different parts of the article have different densities, the absorption of the rays is different, and the strength of the signal output by the detector is also different. After the signal of different strengths is processed by the image, it is displayed on the computer screen, and the interior of the vehicle is formed. Contours and forms, through the line of sight to see the closed compartment loading items.

In 2010, the first radiation perspective imaging green-pass detection device was installed at the main line of Fengnan West in Tangjin Expressway. This device adopts ray radiation perspective imaging technology to realize the detection of green-passenger vehicle open-boxes, and opens up a new era of green traffic vehicle inspection. .

Radiant imaging green-pass detector installed in Karatsu high-speed system can automatically scan the ray of the cargo carried by the vehicle. The image can be synchronized with the remote screen display. The inspector can determine the trueness of the green channel vehicle according to the image for the first time. Sex, this process only requires the vehicle to pass through the inspection station at a constant speed, without pausing or opening the car. Nowadays, Tangjin Expressway has fully realized the high-efficiency management model of automatic detection of the main line station and manual detection of the main station, which is supplemented by the detection of the main equipment. Fresh agricultural product transportation vehicles are more smooth and fast.