Coal gangue detection method

Abstract

The invention provides a coal gangue detection method. By using an X-ray emitter, a receiver and a depth camera, the method comprises the following steps: processing a depth map obtained by a depth camera to obtain thickness information of a partial region in a visual range of the depth camera, selecting a plurality of points, performing curve fitting on the thickness information of the points andintensity information of X-rays obtained by an X-ray receiver by using a least square method, and distinguishing whether a target object is coal briquettes or gangue according to a fitting result. According to the method, the coal gangue is distinguished by virtue of the X-ray penetration characteristic of the coal gangue, the penetration characteristics of the coal gangue and the thickness of the coal gangue have a certain function relationship, the local thickness information of the coal gangue is obtained by adopting a depth camera, and then the thickness information of a plurality of target points and the penetration information of the X-rays at the corresponding positions are combined to solve the energy attenuation coefficient of the target so as to distinguish the coal or the coalgangue.

Description

technical field [0001] The invention relates to the field of ore detection, in particular to a detection method for coal and gangue. Background technique [0002] Coal gangue is solid waste discharged during coal production and processing. It is a rock with low carbon content and harder than coal. In order to improve the quality of coal, it is very important to distinguish coal and gangue well. Commonly used methods of identification include the use of vision, based on the difference in the surface texture of coal and gangue, but it is easily affected by surface dust and light, resulting in the problem of incorrect identification. There are also volume and mass to extract density to distinguish, but in the process of volume acquisition, multiple depth cameras need to be used, and the calculation is cumbersome and there are many dead angles. Some use an X-ray detection device and an RGB camera to obtain the overall height through the RGB camera to calculate the attenuation ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that existing coal and gangue identification methods are prone to errors and the identification method is complicated, the present invention provides a coal and coal gangue detection method to realize fast and accurate identification of coal and coal gangue

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