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A kind of detection method of coal and coal gangue

A detection method and technology for coal gangue, which are applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of complex and error-prone identification methods, and achieve the effects of small calculation amount, high robustness and high reliability.

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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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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  • A kind of detection method of coal and coal gangue
  • A kind of detection method of coal and coal gangue
  • A kind of detection method of coal and coal gangue

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

[0050] A method for detecting coal and gangue, comprising the following steps:

[0051] Step 1, determine the world coordinate system and the coordinate system of the X-ray detection device, and obtain the conversion relationship between the image coordinate system of the X-ray receiving image and the coordinate system of the X-ray detection device.

[0052] First, determine the world coordinate system, take the plane where the conveyor belt is located as the plane composed of XY axes, take the running direction of the conveyor belt as the direction of the X axis, expand the right-handed Cartesian coordinate system, and the Z axis direction is perpendicular to the plane of the conveyor belt upwards.

[0053] Let the X-ray detection device emit X-rays in the opposite direction of the Z-ax...

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Abstract

A coal gangue detection method provided by the present invention uses an X-ray emitter, a receiver and a depth camera to process the depth map obtained by the depth camera to obtain thickness information of some areas within the visual range of the depth camera, and select several points, Use the least squares method to fit the thickness information and the X-ray intensity information obtained by the X-ray receiver, and distinguish whether the target object is coal or gangue according to the fitting result. This method uses the X-ray penetration characteristics of coal gangue to distinguish coal gangue. The penetration characteristics of coal gangue have a certain functional relationship with the thickness of coal gangue. The depth camera is used to obtain the local thickness information of coal gangue, and then multiple The thickness information of each target point is combined with the X-ray penetration information of the corresponding position to solve the energy attenuation coefficient of the target to distinguish coal or gangue.

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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/04
CPCG01N23/04G01N2223/03G01N2223/1016G01N2223/652
Inventor 昝鑫刘天宝吴泽鹏
Owner XI AN JIAOTONG UNIV
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