Ore sample self-adaptive intelligent sampling system and sampling method

Abstract

The application discloses a kind of ore sample self-adaptive intelligent sampling system and sampling method, comprising: laser scanning device;Follow-up sampling device;Control system, the control system according to the particle size distribution of material section controls three-dimensional motion platform movement, so that sampling system can move synchronously with material when sampling, and control the sampling head movement of sampling system to different positions on the current section, according to the sample particle size scheme set carries out the sampling of sample.Using laser scanning device to scan material and obtain the particle size distribution of material section, during sampling operation, control the sampling head movement and make sampling head can always be located on the same material section, according to the particle size distribution and the particle size scheme of sample sampling control sampling head to move to different particle size distribution area, realize the sampling operation of different particle size material, so that the particle size distribution of sample can meet the requirement of sample particle size scheme.

Description

Technical Field

[0001] This invention belongs to the field of ore sample testing technology, specifically relating to an adaptive intelligent sampling system and sampling method for ore samples. Background Technology

[0002] Ore sample analysis is a crucial step in the exploration, mining, and processing of minerals. It involves obtaining a certain number of representative samples and testing them to assess the quality, composition, and economic value of the ore.

[0003] Currently, the sampling methods used in ore sample analysis are relatively crude. Typically, a sampling bucket is used to randomly grab a certain amount of ore sample from a conveyor belt, which is then crushed and reduced in size before analysis. This sampling and testing method suffers from poor sample representativeness, failing to accurately reflect the true properties of the ore and thus failing to meet the requirements for accurate ore performance testing. This directly impacts the formulation of subsequent ore sorting processes. Summary of the Invention

[0004] The purpose of this invention is to provide an adaptive intelligent sampling system and method for ore samples, so as to solve the problems of crude sampling methods and poor sample representativeness in existing ore sample sampling methods.

[0005] This invention is achieved through the following technical solution: An adaptive intelligent sampling system for ore samples is used to sample materials on a conveyor belt, including: A laser scanning device is used to scan materials and obtain the particle size distribution of mineral particles on different cross sections of the materials. A follow-up sampling device includes a three-dimensional motion platform and a sampling system. The sampling system is set on the three-dimensional motion platform and is used to send the sampling system to the sampling position. After being sent to the sampling position, the sampling system samples the material at the current position. The control system controls the movement of the three-dimensional motion platform according to the particle size distribution of the material cross-section, so that the sampling system can move synchronously with the material during sampling, and controls the sampling head of the sampling system to move to different positions on the current cross-section, and samples are sampled according to the set sample particle size scheme.

[0006] In some embodiments, the particle size distribution includes the distribution of coarse-grained ore, medium-grained ore, and fine-grained ore, wherein the coarse-grained ore has a particle size greater than 30 mm, the medium-grained ore has a particle size between 5 and 30 mm, and the fine-grained ore has a particle size less than 5 mm.

[0007] In some embodiments, the particle size distribution includes several coarse-grained ore distribution areas, medium-grained ore distribution areas, and fine-grained ore distribution areas obtained by dividing the material cross-section according to the distribution of coarse-grained ore, medium-grained ore, and fine-grained ore, as well as the location information of each distribution area.

[0008] In some embodiments, the three-dimensional motion platform includes a portal frame spanning a conveyor belt, an X-axis motion unit is disposed on the portal frame, a Y-axis motion unit is disposed on the X-axis motion unit, a Z-axis motion unit is disposed on the Y-axis motion unit, and the sampling system is disposed on the Z-axis motion unit.

[0009] In some embodiments, the laser scanning device includes a plurality of laser scanners disposed on a portal frame.

[0010] In some embodiments, the sampling system includes a vacuum device and a sample container, and the sampling head is connected to the vacuum device and the sample container respectively. After the sampling head is sent to the sampling position, the vacuum device performs vacuum adsorption on the material at the current position and collects it into the sample container.

[0011] In some embodiments, three sampling heads are provided, each used for sampling minerals of different particle sizes. Each of the three sampling heads is equipped with a switching valve for controlling the connection or disconnection between the sampling head and the vacuum device.

[0012] In some embodiments, the control system controls the movement of the three-dimensional motion platform according to the speed of the acquired conveyor belt, so that the sampling system can move at the same speed in the direction of the conveyor belt movement during the sampling operation, and the sampling head of the sampling system can remain in the plane of the same cross-section during the sampling operation.

[0013] In some embodiments, the sample particle size scheme includes the proportions of coarse-grained ore, medium-grained ore, and fine-grained ore in the sample.

[0014] On the other hand, the present invention also provides an adaptive intelligent sampling method for ore samples, which uses the aforementioned adaptive intelligent sampling system for ore samples to collect samples, including the following steps: The material is scanned by a laser scanning device to obtain the particle size distribution of mineral particles on different cross sections of the material. Based on the particle size distribution, the material cross section is divided into multiple distribution zones, including several coarse-grained mineral distribution zones, medium-grained mineral distribution zones, and fine-grained mineral distribution zones. The position data of each distribution zone on the current cross section is also obtained. The movement speed of the conveyor belt is obtained. Based on the movement speed of the conveyor belt and the particle size distribution of the material cross section, the movement of the three-dimensional motion platform is controlled so that the sampling head of the sampling system moves to the plane where the cross section of the material to be sampled is located and moves synchronously with the current cross section along the movement direction of the conveyor belt. The sampling head also moves and extends into the location of different distribution areas. Once the sampling head reaches the sampling position, control the sampling head to perform the sampling operation.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention uses a laser scanning device to scan materials and obtain the particle size distribution of the material cross-section. During the sampling operation, the sampling head is controlled to move and keep it always on the same material cross-section. According to the particle size distribution and the particle size scheme of the sample, the sampling head is controlled to move to different particle size distribution areas to realize the sampling operation of materials with different particle sizes, so that the particle size distribution of the sample can meet the requirements of the sample particle size scheme.

[0016] During the sampling operation, samples are taken from multiple different stratified locations on different material cross-sections, ensuring that the samples are highly representative.

[0017] This invention enables automatic sample collection and allows for the setting of different sample particle size configuration schemes. It enables sampling of different sample particle size configurations on different cross sections. By detecting samples at different locations and with different particle size configurations, the accuracy and reliability of sample detection results can be better guaranteed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the structure of the adaptive intelligent sampling system for ore samples according to an embodiment of the present invention.

[0020] Figure 2 This is a side view of the structure of the adaptive intelligent sampling system for ore samples according to an embodiment of the present invention.

[0021] in: 10. Conveyor belt; 20. Materials; 30. Laser scanner; 41. Portal frame; 42. X-axis motion unit; 43. Y-axis motion unit; 44. Z-axis motion unit; 51. Sampling head; 52. Vacuum device; 53. Sample container. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0023] During the transportation of ore materials, due to factors such as material transfer and vibration, fine-grained ore materials will sink to the bottom, while coarse-grained materials will be located on the surface or on both sides of the conveyor belt. When using existing sampling methods, most of the sampling is done on the surface of the material, resulting in poor representativeness of the samples and low reliability of the sample test results.

[0024] This invention employs laser tomography technology to identify the particle size of mineral materials located at different stratification positions on a conveyor belt. Based on the particle size identification, the movement of the sampling head of a three-degree-of-freedom sampling device is controlled. By controlling the movement path of the sampling head, the sampling operation is performed to ensure the proportion of coarse, medium, and fine particles in the sample, thereby achieving adaptive sampling operation and making the sample more representative.

[0025] Reference Figure 1 and Figure 2 In some embodiments of the present invention, an adaptive intelligent sampling system for ore samples is used to sample the material 20 on the conveyor belt 10, including: A laser scanning device is used to scan materials and obtain the particle size distribution of mineral particles on different cross sections of the material. The follow-up sampling device includes a three-dimensional motion platform and a sampling system. The sampling system is set on the three-dimensional motion platform, which is used to send the sampling system to the sampling position. After being sent to the sampling position, the sampling system samples the material at the current position. The control system controls the movement of the three-dimensional motion platform according to the particle size distribution of the material cross-section, so that the sampling system can move synchronously with the material during sampling and control the sampling head of the sampling system to move to different positions on the current cross-section to sample according to the set sample particle size scheme.

[0026] like Figure 1 and Figure 2 The laser scanning device includes multiple laser scanners 31 mounted on a portal frame 41 and a particle size distribution identification and processing system. Taking three laser scanners as an example, the three scanners are respectively positioned at the upper left, directly above, and upper right of the conveyor belt cross-section, and are located in the same plane. The laser beam direction of each laser scanner is perpendicular to the conveyor belt's movement direction, allowing the projected laser beam to cover the entire width of the material layer, thus forming a direct sampling of the cross-sectional data.

[0027] The system monitors the speed of the conveyor belt in real time using an encoder or speed sensor, and accurately marks the corresponding spatial position information of each contour line. When a certain cross-section moves to the predetermined sampling position, the system extracts the contour line set of the cross-section and its adjacent area from the data, and generates the cross-section contour by weighted averaging or curve fitting.

[0028] A particle size distribution recognition and processing system is used to process the acquired data, identify the particle outline boundaries, calculate the estimated particle size at different spatial locations on the cross-section, and map these data to the bandwidth and height directions to form a two-dimensional image of particle size distribution. In this image, different gray levels or colors represent different particle size ranges to show the particle size distribution of the material on the end face.

[0029] For example, during material transport, fine particles tend to settle and concentrate towards the center of the conveyor belt, while coarser particles are distributed more in the edge areas. The system calculates the spatial distribution ratio of coarse, medium, and fine ore particles on the cross-section and their spatial locations by statistically analyzing the area proportion of each particle size range.

[0030] Specifically, the particle size distribution includes the distribution of coarse, medium, and fine-grained ore. Coarse-grained ore has a particle size greater than 30 mm, medium-grained ore has a particle size between 5 and 30 mm, and fine-grained ore has a particle size less than 5 mm.

[0031] The particle size distribution includes several coarse-grained ore distribution areas, medium-grained ore distribution areas, and fine-grained ore distribution areas obtained by dividing the material cross section according to the distribution of coarse-grained ore, medium-grained ore, and fine-grained ore particles, as well as the location information of each distribution area. Based on this location information, subsequent sampling operations can be controlled.

[0032] In some embodiments, such as Figure 1 and 2 As shown, the three-dimensional motion platform includes a portal frame 41 spanning a conveyor belt, an X-axis motion unit 42 located on the portal frame, a Y-axis motion unit 43 located on the X-axis motion unit, a Z-axis motion unit 44 located on the Y-axis motion unit, and a sampling system located on the Z-axis motion unit 44.

[0033] The X-axis motion unit is used to move along the width of the conveyor belt, the Y-axis motion unit is used to move along the length of the conveyor belt, and the Z-axis motion unit is used to move along the vertical direction. At this time, the three-dimensional motion platform can move in three directions in space, thereby delivering the sampling system to the required sampling position.

[0034] The X-axis motion unit, Y-axis motion unit, and Z-axis motion unit can adopt a sliding rail and slider cooperation structure, and use existing transmission mechanisms to achieve linear transmission.

[0035] In some embodiments, the sampling system includes a vacuum device 52 and a sample container 53. The sampling head 51 is connected to the vacuum device 52 and the sample container 53 respectively. After the sampling head 51 is sent to the sampling position, the vacuum device performs vacuum adsorption on the material at the current position and collects it into the sample container 53.

[0036] For example, a vacuum pump is used to create a vacuum within the sampling head, and the sample is collected into the sample container through vacuum adsorption. During sampling, the vacuum valve is opened to draw in the mineral material at the corresponding location; the vacuum valve is then closed, and the discharge valve is opened, allowing the mineral material to enter the sample container. A weight sensor can be installed in the sample container to detect the weight of the sample inside.

[0037] After a sampling is completed, the backflush valve can be opened to backflush and clean the sampling head to prevent it from becoming clogged.

[0038] In some embodiments, the sampling head 51 may be configured as three, and the three sampling heads are respectively used for sampling minerals of different particle sizes. Each of the three sampling heads is provided with a switching valve for controlling the disconnection or connection between the sampling head and the vacuum device.

[0039] Reference Figure 1 Three sampling heads 51 are arranged side by side and have different tube diameters; from left to right, the tube diameters of the sampling heads increase sequentially, and they are used for sampling fine-grained, medium-grained, and coarse-grained ores, respectively. Based on the different stratification locations of fine-grained, medium-grained, and coarse-grained ores, the three sampling heads are set to have different lengths. This allows the sampling ports of different sampling heads to be delivered to different positions when the three sampling heads are driven simultaneously. This eliminates the need for frequent switching of sampling heads during sampling, reducing the sampling time and simplifying the structure of the sampling system.

[0040] Different screens can be configured for different sampling heads, allowing control over the particle size sampled by each head while preventing clogging. For example, screens used for sampling fine-grained minerals have smaller mesh sizes compared to screens used for sampling medium-grained minerals.

[0041] In some embodiments, the control system controls the movement of the three-dimensional motion platform according to the speed of the acquired conveyor belt, so that the sampling system can move at the same speed in the direction of the conveyor belt movement during the sampling operation, and the sampling head of the sampling system can remain in the plane of the same cross-section during the sampling operation.

[0042] By controlling the sampling head to move synchronously with the conveyor belt, the sampling head can perform sampling operations on materials at different locations on the same cross section during the sampling process.

[0043] During sampling, the sampling head moves synchronously in the Y-axis along with the sampling cross-section. The control system, based on the sampling particle size scheme, the distribution of different particle size distribution areas on the sampling cross-section, and the positions of the sampling ports of the three sampling heads, controls the movement of the sampling heads in the X and Z axes via a three-dimensional motion platform. This directs the sampling ports of the three sampling heads to the different distribution areas, enabling sampling of materials of different particle sizes. This eliminates the need to move the sampling heads during sampling, reducing disturbance to the material, preventing significant changes in the positions of different particle size distribution areas within the cross-section, and ensuring sampling accuracy.

[0044] During the sampling operation, the control system can control the sampling order of the three sampling heads. For example, the coarse-grained ore located on the surface can be sampled first, then the medium-grained ore located in the middle can be sampled, and finally the fine-grained ore located at the bottom can be sampled. This can reduce the disturbance of the sampling operation to the distribution area within the cross section.

[0045] The control system performs decision analysis based on the location data of the particle size distribution area, determines the motion control data of the sampling head, and controls the sampling head to move to the sampling position.

[0046] Of course, only one sampling head can be used for sampling. During the sampling operation, the control system controls the sampling port of the sampling head to move to the sampling position to be sampled through the three-dimensional motion platform, and performs sampling operations for coarse-grained ore, medium-grained ore, and fine-grained ore in multiple times.

[0047] In some embodiments, the sample particle size scheme includes the proportions of coarse, medium, and fine ore particles in the sample. For example, the sample particle size scheme may set the proportions of coarse, medium, and fine ore particles to 20%, 40%, and 40%, respectively. For this sample particle size scheme, during sampling, the number of suction times and the time for each sampling head during vacuum suction operation are set to control the sampling weight of the corresponding particle size material.

[0048] Taking a target sample of 500g as an example, the sampling frequency of the coarse-grained sampling head is set to 2 times, with each suction time set to 0.8s, and the sample weight of coarse-grained ore is approximately 115g; the sampling frequency of the medium-grained sampling head is set to 3 times, with each suction time set to 0.6s, and the sample weight of medium-grained ore is approximately 208g; the sampling frequency of the fine-grained sampling head is set to 1 time, with each suction time set to 1.2s, and the sample weight of fine-grained ore is approximately 185g; the total mass of the sample is 508g, and the proportions of coarse-grained ore, medium-grained ore, and fine-grained ore are 22.6%, 40.9%, and 36.4%, respectively, which basically meets the requirements of the set sample particle size scheme.

[0049] On the other hand, the present invention also provides an adaptive intelligent sampling method for ore samples, which uses an adaptive intelligent sampling system for ore samples to collect samples, including the following steps: The material is scanned by a laser scanning device to obtain the particle size distribution of mineral particles on different cross sections of the material. Based on the particle size distribution, the material cross section is divided into multiple distribution zones, including several coarse-grained mineral distribution zones, medium-grained mineral distribution zones, and fine-grained mineral distribution zones. The position data of each distribution zone on the current cross section is also obtained. The movement speed of the conveyor belt is obtained. Based on the movement speed of the conveyor belt and the particle size distribution of the material cross section, the movement of the three-dimensional motion platform is controlled so that the sampling head of the sampling system moves to the plane where the cross section of the material to be sampled is located and moves synchronously with the current cross section along the movement direction of the conveyor belt. The sampling head also moves and extends into the location of different distribution areas. Once the sampling head reaches the sampling position, control the sampling head to perform the sampling operation.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not imply that the components are required to be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An adaptive intelligent sampling system for ore samples, characterized in that, Used for sampling materials on the conveyor belt, including: A laser scanning device is used to scan materials and obtain the particle size distribution of mineral particles on different cross sections of the materials. A follow-up sampling device includes a three-dimensional motion platform and a sampling system. The sampling system is set on the three-dimensional motion platform and is used to send the sampling system to the sampling position. After being sent to the sampling position, the sampling system samples the material at the current position. The control system controls the movement of the three-dimensional motion platform according to the particle size distribution of the material cross-section, so that the sampling system can move synchronously with the material during sampling, and controls the sampling head of the sampling system to move to different positions on the current cross-section, and samples are sampled according to the set sample particle size scheme.

2. The adaptive intelligent sampling system for ore samples according to claim 1, characterized in that, The particle size distribution includes the distribution of coarse, medium, and fine ore particles. The coarse ore particles are larger than 30 mm, the medium ore particles are between 5 and 30 mm, and the fine ore particles are smaller than 5 mm.

3. The adaptive intelligent sampling system for ore samples according to claim 2, characterized in that, The particle size distribution includes several coarse-grained ore distribution areas, medium-grained ore distribution areas, and fine-grained ore distribution areas obtained by dividing the material cross-section according to the distribution of coarse-grained ore, medium-grained ore, and fine-grained ore, as well as the location information of each distribution area.

4. The adaptive intelligent sampling system for ore samples according to claim 1, characterized in that, The three-dimensional motion platform includes a portal frame spanning a conveyor belt, an X-axis motion unit is arranged on the portal frame, a Y-axis motion unit is arranged on the X-axis motion unit, a Z-axis motion unit is arranged on the Y-axis motion unit, and the sampling system is arranged on the Z-axis motion unit.

5. The adaptive intelligent sampling system for ore samples according to claim 4, characterized in that, The laser scanning device includes multiple laser scanners mounted on a portal frame.

6. The adaptive intelligent sampling system for ore samples according to claim 1 or 4, characterized in that, The sampling system includes a vacuum device and a sample container. The sampling head is connected to both the vacuum device and the sample container. After the sampling head is sent to the sampling position, the vacuum device performs vacuum adsorption on the material at the current position and collects it into the sample container.

7. The adaptive intelligent sampling system for ore samples according to claim 6, characterized in that, The sampling head is configured with three sampling heads, each used for sampling minerals of different particle sizes. Each of the three sampling heads is equipped with a switch valve for controlling the connection or disconnection between the sampling head and the vacuum device.

8. The adaptive intelligent sampling system for ore samples according to claim 1 or 4, characterized in that, The control system controls the movement of the three-dimensional motion platform according to the speed of the conveyor belt, so that the sampling system can move at the same speed in the direction of the conveyor belt during the sampling operation, and the sampling head can keep moving in the same plane of the cross section during the sampling operation.

9. The adaptive intelligent sampling system for ore samples according to claim 1 or 2, characterized in that, The sample particle size scheme includes the proportion of coarse, medium, and fine ore particles in the sample.

10. An adaptive intelligent sampling method for ore samples, characterized in that, Sampling of ore samples using the adaptive intelligent sampling system for ore samples according to any one of claims 1-9 includes the following steps: The material is scanned by a laser scanning device to obtain the particle size distribution of mineral particles on different cross sections of the material. Based on the particle size distribution, the material cross section is divided into multiple distribution zones, including several coarse-grained mineral distribution zones, medium-grained mineral distribution zones, and fine-grained mineral distribution zones. The position data of each distribution zone on the current cross section is also obtained. The movement speed of the conveyor belt is obtained. Based on the movement speed of the conveyor belt and the particle size distribution of the material cross section, the movement of the three-dimensional motion platform is controlled so that the sampling head of the sampling system moves to the plane where the cross section of the material to be sampled is located and moves synchronously with the current cross section along the movement direction of the conveyor belt. The sampling head also moves and extends into the location of different distribution areas. Once the sampling head reaches the sampling position, control the sampling head to perform the sampling operation.

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