X-ray static CT (Computed Tomography) online coal quality detection system

Abstract

The utility model discloses an X-ray static CT online coal quality detection system, the system comprises an electronic belt scale, a multi-point source light machine, a multilayer detector, a data acquisition card and a computer, the electronic belt scale is installed below a conveyor belt and is used for weighing coal flow on the conveyor belt; the multi-point source light machine emits X-rays to coal flow on the conveying belt on the conveying belt, and the multi-layer detector receives the X-rays penetrating through the coal flow below the conveying belt; the data acquisition card is in communication connection with the electronic belt scale, the multi-point source light machine, the multi-layer detector and the computer and is used for sending data of the electronic belt scale, the multi-point source light machine and the multi-layer detector to the computer; and the computer performs online coal quality detection according to the received data.

Description

Technical Field

[0001] This utility model relates to the field of coal quality testing technology, and in particular to an online coal quality testing system using X-ray static CT. Background Technology

[0002] Currently, online measurement of coal ash and elemental composition mainly relies on the following technologies: (1) dual-energy gamma-ray transmission method; (2) X-ray transmission method; (3) neutron transient gamma-ray activation analysis; (4) X-ray fluorescence technology, etc.

[0003] The disadvantages of existing technologies are: (1) Dual-energy gamma-ray transmission method uses a radioactive source, which is inconvenient to manage. In addition, it is greatly affected by the changes in the elemental composition of coal and is only suitable for measuring coal from a single mine. (2) X-ray transmission method uses a beam of rays to transmit through the coal flow to measure ash content. The calculation model treats the transmitted coal flow as a homogeneous medium, but the actual coal flow contains particles of different compositions and is not homogeneous. Therefore, the model will introduce errors. (3) Neutron-prompt gamma-ray activation analysis uses a neutron radioactive source, which is more dangerous. However, the management remains unchanged. The neutron source has a short half-life and a short replacement cycle. (4) X-ray fluorescence technology has low radiation energy and weak penetration ability, and cannot analyze coal with large thickness. Summary of the Invention

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one objective of this invention is to propose an online coal quality detection system based on X-ray static CT. This invention uses an electronic belt scale to weigh the coal flow on a conveyor belt; employs a multi-target X-ray source and multi-layer detectors to achieve multi-energy static CT scanning of the coal flow; and performs online coal quality detection based on the static CT scan data and weighing data. The entire measurement process is real-time and non-contact, and does not affect the material transport.

[0006] To achieve the above objectives, one embodiment of this utility model proposes an online coal quality inspection system using static X-ray CT, comprising an electronic belt scale, a multi-source optical engine, a multi-layer detector, a data acquisition card, and a computer.

[0007] An electronic belt scale is installed below the conveyor belt to weigh the coal flow on the conveyor belt;

[0008] A multi-source optical engine emits X-rays onto the coal flow on the conveyor belt, and a multi-layer detector receives the X-rays that penetrate the coal flow below the conveyor belt.

[0009] The data acquisition card communicates with the electronic belt scale, multi-point source optomechanical system, multi-layer detector, and computer to send data from the electronic belt scale, multi-point source optomechanical system, and multi-layer detector to the computer.

[0010] The computer performs online coal quality testing based on the received data.

[0011] The X-ray static CT online coal quality testing system according to the above embodiments of this utility model may also have the following additional technical features:

[0012] Furthermore, in one embodiment of this utility model, the electronic belt scale includes a weighing sensor and a speed measuring device. The weighing sensor measures the weight of the coal flow on the belt, and the speed measuring device measures the running speed of the conveyor belt.

[0013] Furthermore, in one embodiment of this utility model, the multi-target X-ray sources of the multi-point source optomechanical system are arranged on a plane perpendicular to the direction of coal flow. The multi-point source optomechanical system sequentially switches different target points to emit beams, emitting X-rays with specific energy spectra in the direction of coal flow on the conveyor belt. The X-rays emitted from different target points have different directions, and the scanning range of the multi-target X-ray sources covers the cross-section of the coal flow.

[0014] Furthermore, in one embodiment of this invention, the multilayer detector consists of N rows of detectors, each row of detectors receiving X-rays of corresponding energy.

[0015] Furthermore, in one embodiment of this utility model, it further includes:

[0016] The control module is connected to the electronic belt scale, multi-point source optomechanical unit, multi-layer detector, and computer. It is used to receive control commands from the computer and control the electronic belt scale, multi-point source optomechanical unit, and multi-layer detector.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the X-ray static CT online coal quality detection system according to an embodiment of the present invention. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0021] The following description, with reference to the accompanying drawings, describes an online coal quality testing system based on an embodiment of the present invention using static X-ray CT.

[0022] Figure 1 This is a schematic diagram of the structure of the X-ray static CT online coal quality detection system according to an embodiment of the present invention.

[0023] like Figure 1 As shown, the X-ray static CT online coal quality inspection system includes an electronic belt scale, a multi-source optical engine, a multi-layer detector, a data acquisition card, and a computer.

[0024] An electronic belt scale is installed below the conveyor belt to weigh the coal flow on the conveyor belt;

[0025] A multi-source optical engine emits X-rays onto the coal flow on the conveyor belt, and a multi-layer detector receives the X-rays that penetrate the coal flow below the conveyor belt.

[0026] The data acquisition card communicates with the electronic belt scale, multi-point source optomechanical system, multi-layer detector, and computer to send data from the electronic belt scale, multi-point source optomechanical system, and multi-layer detector to the computer.

[0027] The computer performs online coal quality inspection based on the received data.

[0028] Furthermore, in one embodiment of this utility model, the weight of the material is obtained by an electronic belt scale, such as... Figure 1 As shown, it includes:

[0029] The weight of the material on the conveyor belt is measured in real time by a load cell installed beneath the belt, while the belt speed is obtained simultaneously by a speed measuring device (such as an encoder or speed measuring roller). The instantaneous material flow rate is obtained by calculating the product of the material weight per unit length and the belt speed, and the cumulative material volume is calculated by integrating the flow rate data. The entire measurement process is real-time, non-contact, and does not affect the material conveying process.

[0030] Furthermore, in one embodiment of this utility model, such as Figure 1 As shown, multi-energy static CT scanning employs multi-target X-ray sources and multiple detectors with different energy response functions in the same plane.

[0031] By using a multi-point X-ray source to emit X-rays point by point in sequence, the complex mechanical system required by traditional CT, which necessitates the design of a rotating structure, is avoided. Furthermore, the absence of mechanical selection greatly increases the detection speed, thus adapting to online measurement of materials on conveyor belts.

[0032] Multi-target X-ray sources are arranged on a plane perpendicular to the direction of coal flow, emitting X-rays with specific energy spectra into the coal flow. The X-rays emitted from different target points have different directions. Its design features include: 1) Wide-angle projection coverage: The X-ray source points are rationally arranged, and the scanning plane can be one or more planes, covering the entire cross-section of the coal flow with projection angles, ensuring complete projection data acquisition. 2) Rapid switching between different target beams: Using carbon nanotube X-ray tubes or other X-ray sources capable of rapid switching ensures fast switching between multiple source points, improving scanning efficiency.

[0033] The detection device consists of N rows of detectors used to receive X-rays penetrating a coal sample and analyze their attenuation characteristics for different energies. The first row of detectors, with a first energy response, is arranged in a first plane parallel to the distributed X-ray source, receiving X-ray signals of the first energy level penetrating the coal flow. The second row of detectors, with a second energy response, is arranged in a second plane parallel to the distributed X-ray source, receiving X-ray signals of the second energy level penetrating the coal flow. The Nth row of detectors, with an Nth energy response, is arranged in a Nth plane parallel to the distributed X-ray source, receiving X-ray signals of the Nth energy level penetrating the coal flow. Each row of detectors has different energy response characteristics.

[0034] Furthermore, in one embodiment of this utility model, the computer uses a back-projection algorithm to reconstruct static CT projection data into linear attenuation coefficients at various points in the material, thereby obtaining a linear attenuation coefficient image at a given energy.

[0035] The computer uses the multi-energy linear decay coefficient image and material weight to solve for the ash content and elemental composition of coal.

[0036] Furthermore, in one embodiment of this utility model, such as Figure 1 As shown, the system also includes:

[0037] The control module is connected to the electronic belt scale, multi-point source optomechanical unit, multi-layer detector, and computer. It is used to receive control commands from the computer and control the electronic belt scale, multi-point source optomechanical unit, and multi-layer detector.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An online coal quality testing system using static X-ray CT, characterized in that, This includes an electronic belt scale, a multi-point source optomechanical unit, a multilayer detector, a data acquisition card, and a computer. The electronic belt scale is installed below the conveyor belt and is used to weigh the coal flow on the conveyor belt; The multi-point source optoelectronic device emits X-rays on the conveyor belt towards the coal flow on the conveyor belt, and the multilayer detector receives the X-rays that penetrate the coal flow below the conveyor belt. The data acquisition card is communicatively connected to the electronic belt scale, the multi-point source optomechanical system, the multilayer detector, and the computer, and is used to send data from the electronic belt scale, the multi-point source optomechanical system, and the multilayer detector to the computer; The computer performs online coal quality testing based on the received data.

2. The X-ray static CT online coal quality detection system according to claim 1, characterized in that, The electronic belt scale includes a weighing sensor and a speed measuring device. The weighing sensor measures the weight of the coal flow on the belt, and the speed measuring device measures the running speed of the conveyor belt.

3. The X-ray static CT online coal quality detection system according to claim 1, characterized in that, The multi-target X-ray sources of the multi-point source optomechanical system are arranged on a plane perpendicular to the direction of coal flow. The multi-target source optomechanical system sequentially switches different target points to emit beams, emitting X-rays with specific energy spectra in the direction of coal flow on the conveyor belt. The X-rays emitted from different target points have different directions, and the scanning range of the multi-target X-ray sources covers the cross-section of the coal flow.

4. The X-ray static CT online coal quality detection system according to claim 1, characterized in that, The multilayer detector consists of N rows of detectors, each row receiving X-rays of corresponding energy.

5. The X-ray static CT online coal quality detection system according to claim 1, characterized in that, Also includes: The control module is communicatively connected to the electronic belt scale, the multi-point source optomechanical system, the multilayer detector, and the computer. It is used to receive control commands from the computer and control the electronic belt scale, the multi-point source optomechanical system, and the multilayer detector.

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