An empty container detection method based on radiation imaging

Abstract

The invention discloses a method for detecting empty containers based on radiation imaging. The detection method includes two parts: performing radiation perspective imaging on a vehicle loaded with containers, extracting a container area according to the perspective view, and performing digital image processing and mathematical statistics on the container area. The obtained value is compared with the threshold value calibrated according to the empty container to determine whether the container is empty. The advantages of the invention are: the accuracy rate of container empty detection is higher than the traditional ultrasonic-based method, the update of the empty container identification algorithm is more convenient, and the hardware transformation cost is reduced for the technical upgrading of the equipment.

Description

technical field [0001] The invention relates to a vehicle inspection system in the field of radiation imaging, and an empty container detection method based on radiation imaging, which can more accurately judge the empty container of a container. Background technique [0002] my country is a big trading country and an export-oriented economy. A large number of empty containers enter customs every year, and the demand for detection of empty containers is increasing day by day. At present, there are two main methods for detecting empty containers in China: one is that the container vehicle using the entry and exit gates must open the door of the container, the bayonet must have a high-level camera and searchlight that can shine into the container, and manually intercept the empty container to check the situation, or Randomly carry out key manual / machine inspections of empty vehicles. These methods all require special personnel to intervene on-site at the gateway, which has low...

AI Technical Summary

Problems solved by technology

This method has three important defects. First, the material of the container is different, and the thickness of the iron sheet is different, which has a great influence on the echo of the ultrasonic wave, and brings great difficulties to the calibration and collection of the echo characteristics of your empty container. Accurate judgment cannot be made due to the inaccurate collection of echo characteristics of empty containers. Second, the ultrasonic generator and sonar must scan the entire container from top to bottom, from left to right, and the vehicle must stop, which takes too long. Compared with the existing container empty box detection method, the inspection efficiency is very low

Third, mechanical equipment such as engines will generate a large amount of ultrasonic waves during operation, which interferes with detection. Especially for areas near the bottom of containers, the ultrasonic features are complex, and it is impossible to judge empty containers based on ultrasonic feedback. In practical applications, the empty container detection system based on ultrasonic waves Not so good in terms of accuracy

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