Digital coal yard system

Abstract

The invention relates to the field of coal gangue processing, and discloses a digital coal yard system which comprises a conveying unit, a feeding unit, a heating unit, a flattening unit, an identifying unit, a sorting unit and a cooling unit. The conveying unit conveys coal gangues to be sorted, the feeding unit supplies raw materials to the coal gangues, the heating unit heats the coal gangues, and different heat radiation characteristics are generated. And the identification unit identifies the coal gangue by utilizing the characteristics and sends a result to the control unit, so that accurate control is realized. The sorting unit sorts the coal gangue according to the control signal, and the cooling unit is used for preventing the conveying belt from being affected by the temperature. The coal and gangue are accurately recognized through the thermal radiation characteristic, and compared with traditional visual recognition and thermal imaging technologies, the method has more advantages, is not interfered by environmental factors and is suitable for complex scenes and severe working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of coal gangue processing, in particular to a digital coal yard system. Background Art

[0002] The raw coal directly mined from coal mines contains a lot of gangue, which contains a lot of heavy metals and affects the calorific value of coal, causing serious pollution to the environment during combustion. Only by separating coal and gangue can they play their respective roles. As an important part of the coal industry, gangue sorting can improve coal quality, save energy and reduce consumption, and make rational use of resources.

[0003] Traditional methods of coal gangue sorting have certain shortcomings. For example, coal blocks and gangue are easily mixed together, which makes it difficult for detectors to detect them, resulting in poor sorting results. They usually rely on manual operations, and their accuracy is affected by human factors, which makes errors prone and the sorting efficiency is low. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a digital coal yard system, which solves the problem that the traditional coal gangue sorting means have poor sorting effect, rely on manual operation and have low sorting efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A digital coal yard system, comprising:

[0006] A conveying unit, used for conveying the coal gangue to be sorted;

[0007] A feeding unit, arranged upstream of the conveying unit, for supplying coal gangue to the conveying unit;

[0008] A heating unit is arranged downstream of the feeding unit and is used to heat the coal gangue transported by the transport unit so as to generate thermal radiation characteristics;

[0009] An identification unit, arranged downstream of the heating unit, is used to identify the coal gangue that generates thermal radiation characteristics and send the identification result to the control unit, and the control unit sends a control signal according to the identification result and the control logic;

[0010] A sorting unit, arranged downstream of the identification unit, is used to receive a control signal from the control unit to sort the gangue;

[0011] The cooling unit is arranged at the bottom side of the conveying unit and is used to cool the conveying belt of the conveying unit to prevent the temperature of the conveying belt from affecting the identification and processing of the coal gangue by the identification unit.

[0012] Preferably, the conveying unit includes a first conveyor belt and a second conveyor belt, the second conveyor belt is arranged on the outside of the first conveyor belt, the first conveyor belt is supported and driven by a plurality of first rollers, the second conveyor belt is supported by a plurality of first rollers that support and drive the first conveyor belt, and one side is supported by the second conveyor belt to create a separation section between it and the second roller, and the cooling unit is arranged at the separation section.

[0013] Preferably, the system further comprises a monitoring unit, which is arranged at one side of the separation section and connected to the cooling unit for monitoring the temperature of the second conveyor belt at the separation section and controlling the operation of the cooling unit according to a temperature threshold.

[0014] Preferably, the cooling unit comprises a cooling frame, the second conveyor belt is arranged through the middle of the cooling frame, and cooling devices are arranged in the inner cavity of the cooling frame on both upper and lower sides of the second conveyor belt.

[0015] Preferably, the cooling device includes a cooling fan, a refrigerator, and a condenser.

[0016] Preferably, the identification unit comprises:

[0017] A thermal imaging camera for capturing thermal radiation images of the coal gangue transported on the transport unit;

[0018] The image processing module is used to process the acquired thermal radiation image to extract the thermal radiation characteristics of the object and transmit the result to the control unit.

[0019] Preferably, the image processing module includes:

[0020] A preprocessing module, used for preprocessing the thermal radiation image to optimize subsequent processing steps;

[0021] An image segmentation module, used for dividing the entire thermal radiation image into a plurality of separate object images;

[0022] An object recognition module that identifies the image location and bounding box of each individual object;

[0023] Feature extraction module,extracts temperature features from the identified objects.

[0024] Preferably, the control logic of the control unit includes the following:

[0025] Given an object (i):

[0026] T avg,i : the average temperature of the object (i);

[0027] T peak,i : the maximum temperature of object (i);

[0028] θ1 and θ2: pre-set temperature thresholds;

[0029] The decision function f(i) is defined as follows:

[0030]

[0031] Output control signal C(i):

[0032]

[0033] Among them, signal A and signal B represent control signals for sorting objects (i) into corresponding collection areas.

[0034] Preferably, the sorting unit comprises a robotic arm and a pneumatic device; the sorting unit further comprises a first conveying device and a second conveying device, and a first collecting device and a second collecting device are respectively arranged downstream of the first conveying device and the second conveying device.

[0035] Preferably, the system also includes a flattening unit, which is arranged between the heating unit and the identification unit. The flattening unit includes a flattening frame, and a flattening plate that gradually tilts downward from front to back is arranged on the upper part of the flattening frame. The higher end of the flattening plate is rotatably connected in the flattening frame, and a spring is fixedly connected between the lower end of the flattening plate and the top wall of the flattening frame.

[0036] The present invention provides a digital coal yard system, which has the following beneficial effects:

[0037] 1. The present invention utilizes the thermal radiation characteristics of objects through a heating unit. Since coal and gangue have different thermal properties, the process will cause coal and gangue to have different thermal radiation characteristics. The heated mixture will produce different thermal images. Based on this difference, the existence and position of coal and gangue can be accurately identified, thereby enhancing the resolution and accuracy of the identification unit. Compared with traditional visual recognition methods, thermal imaging technology can obtain more information from the perspective of thermal radiation, is not affected by environmental factors such as light and dust, and is suitable for complex scenes and harsh working conditions.

[0038] 2. The present invention flattens the coal gangue object by coordinating the flattening unit with the conveying unit to reduce its unevenness, and can provide a more uniform object surface for subsequent identification and processing, so that it can be more accurately analyzed and processed in the identification unit.

[0039] 3. The present invention can maintain the stability of the conveyor belt temperature by setting the cooling unit, eliminate the noise and uncertainty caused by the conveyor belt temperature change, and improve the reliability and accuracy of the recognition unit.

[0040] 4. The present invention can adjust the operation of the cooling unit as needed through the intelligent temperature control of the monitoring unit, avoid unnecessary energy consumption, and achieve energy efficiency and optimal utilization of resources.

[0041] 5. The present invention is based on the control logic of the control unit. By comparing the average temperature and the maximum temperature of the object with the preset threshold value, it determines whether the object is coal or gangue, and generates a control signal accordingly to sort the object to a suitable collection area, which helps the digital coal yard system to realize automatic sorting and processing of coal gangue and improve the automation and efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 2 It is a schematic diagram of the cooling unit structure of the present invention;

[0044] Figure 3 A schematic structural diagram of an implementation method of the present invention;

[0045] Figure 4 It is a schematic diagram of the flattening unit structure of the present invention;

[0046] Figure 5 A schematic structural diagram of an implementation method of the present invention;

[0047] Figure 6 It is a schematic diagram of the system operation flow of the present invention;

[0048] Figure 7 It is a schematic diagram of the structure of the identification unit of the present invention;

[0049] Figure 8 It is a schematic diagram of the structure of the image processing module of the present invention.

[0050] Among them, 10, conveying unit; 11, first conveyor belt; 12, first roller; 13, second conveyor belt; 14, second roller; 20, feeding unit; 30, heating unit; 40, flattening unit; 41, flattening frame; 42, flattening plate; 43, spring; 50, recognition unit; 51, thermal imaging camera; 52, image processing module; 521, preprocessing module; 522, image segmentation module; 523, target recognition module; 524, feature extraction module; 60, control unit; 70, sorting unit; 71, first conveying device; 711, first collecting device; 72, second conveying device; 721, second collecting device; 80, cooling unit; 81, cooling frame; 82, cooling device; 90, monitoring unit. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Please see attached Figure 1 -Attached Figure 8 , an embodiment of the present invention provides a digital coal yard system, including:

[0053] The conveying unit 10 is used to convey the coal gangue to be sorted, and the coal gangue enters the subsequent unit for processing during the conveying process;

[0054] The feeding unit 20 is arranged upstream of the conveying unit 10 and is used to supply coal gangue to the conveying unit 10 to ensure continuous material transportation;

[0055] The heating unit 30 is arranged downstream of the feeding unit 20 and is used to heat the gangue transported by the conveying unit 10 so that it produces heat radiation characteristics. The heating can be achieved by heating equipment, hot air, microwave heating, etc.

[0056] Specifically, the heating unit 30 utilizes the thermal radiation characteristics of the object. After heating, the temperature of the object will increase, thereby generating a higher thermal radiation intensity or a different thermal radiation spectrum. This heating process will cause coal and gangue to have different thermal radiation characteristics because they have different thermal properties. The heated mixture will produce different thermal images. Based on this difference, the existence and location of coal and gangue can be accurately identified, which enhances the resolution and accuracy of the recognition unit 50. Compared with traditional visual recognition methods, thermal imaging technology can obtain more information from the perspective of thermal radiation, is not affected by environmental factors such as light and dust, and is suitable for complex scenes and harsh working conditions;

[0057] The flattening unit 40 is arranged between the heating unit 30 and the identification unit 50. The flattening unit 40 includes a flattening frame 41. A flattening plate 42 which is gradually inclined downward from the front to the back is arranged on the upper part of the flattening frame 41. The higher end of the flattening plate 42 is rotatably connected to the flattening frame 41. A spring 43 is fixedly connected between the lower end of the flattening plate 42 and the top wall of the flattening frame 41.

[0058] Specifically, the flattening unit 40 is intended to flatten the coal gangue object by cooperating with the conveying unit 10 through its movement, so that it can be more accurately analyzed and processed in the identification unit 50. The flattening unit 40 reduces the degree of unevenness, so that a more uniform object surface can be provided for subsequent identification and processing. The introduction of the flattening unit 40 enhances the system's ability to handle irregular or uneven objects, and helps to improve the accuracy and reliability of the identification unit 50.

[0059] The identification unit 50 is disposed downstream of the heating unit 30 and is used to identify the coal gangue that generates thermal radiation characteristics and identify the target object, such as coal or gangue;

[0060] Specifically, the recognition unit 50 uses the thermal radiation characteristics generated by the gangue, combined with the image processing algorithm, to segment and recognize the target object by detecting the thermal radiation distribution, shape, edge and other characteristics of the gangue. This non-contact thermal imaging recognition method can accurately identify the target object, realize the automated gangue sorting process, and greatly improve the accuracy and efficiency of sorting. Through digital recognition and processing, the transported gangue flow can be monitored and controlled in real time, and the valuable gangue can be sorted, which reduces manual operation and processing errors and improves the efficiency and quality of gangue sorting.

[0061] The control unit 60 receives the recognition result sent by the recognition unit 50 and generates a corresponding control signal according to a preset control logic;

[0062] The sorting unit 70 is arranged downstream of the identification unit 50, and is used to receive the control signal of the control unit 60, and perform sorting operations on the coal gangue according to the control signal, for example, using a mechanical device or airflow to separate the coal gangue identified as the target object, so as to achieve the sorting of the coal gangue;

[0063] The cooling unit 80 is arranged at the bottom side of the conveying unit 10, and is used to cool the conveying belt of the conveying unit 10, so as to prevent the conveying belt temperature from affecting the identification processing of the gangue by the identification unit 50;

[0064] Specifically, the heating unit 30 generates heat during the heating process, which will cause the temperature of the conveyor belt to rise. If the temperature of the conveyor belt is too high, it will have an adverse effect on the quality of thermal imaging and affect the recognition unit 50's ability to accurately identify and process coal gangue. By setting the cooling unit 80, the stability of the conveyor belt temperature can be maintained, the noise and uncertainty caused by the temperature change of the conveyor belt can be eliminated, and the reliability and accuracy of the recognition unit 50 can be improved.

[0065] By setting up the heating unit 30, the identification unit 50 and the cooling unit 80, the digital coal yard system realizes the automatic sorting and processing of coal gangue, and improves the sorting efficiency and accuracy. At the same time, the application of thermal imaging technology enables the identification unit 50 to obtain more information from the perspective of thermal radiation, overcomes the limitations of traditional visual methods, and is suitable for coal gangue sorting scenarios in various environments and working conditions. The digitization and automation of the entire system improves work efficiency and reduces human operation and processing errors.

[0066] As an embodiment of the present invention, the conveying unit 10 includes a first conveyor belt 11 and a second conveyor belt 13, the second conveyor belt 13 is arranged outside the first conveyor belt 11, the first conveyor belt 11 is supported and driven by a plurality of first rollers 12, the second conveyor belt 13 is supported by a plurality of first rollers 12 supporting and driving the first conveyor belt 11, and one side is supported by the second conveyor belt 13 so that a separation section is generated between it and the second roller 14, and the function of this separation section is to separate the first conveyor belt 11 and the second conveyor belt 13 from each other during the transportation of coal gangue, so as to create an area for arranging the cooling unit 80;

[0067] Specifically, by setting the cooling unit 80 at the separation section, the bottom side of the first conveyor belt 11 can be directly cooled to prevent its temperature from being too high. This arrangement enables the cooling unit to better contact and cool the surface of the conveyor belt, improves the cooling effect, and further ensures the stability of the conveyor belt temperature; on the other hand, by setting the separation section, the first conveyor belt 11 and the second conveyor belt 13 are separated in this area, reducing the heat conduction or heat diffusion of the second conveyor belt 13 to the first conveyor belt 11, and preventing the temperature of the second conveyor belt 13 from affecting the cooling effect of the first conveyor belt 11.

[0068] As an embodiment of the present invention, the system further includes a monitoring unit 90, which is arranged on one side of the separation section, and is connected to the cooling unit 80, and is used to monitor the temperature of the second conveyor belt 13 at the separation section, and control the cooling unit 80 to work according to the temperature threshold. The monitoring unit 90 is equipped with a temperature sensor or a thermistor, which can sense the temperature change on the surface of the second conveyor belt 13;

[0069] Specifically, when the monitoring unit 90 detects that the temperature of the second conveyor belt 13 exceeds the set threshold, it will send a signal to the cooling unit 80 to trigger the operation of the cooling unit. The cooling unit 80 will start to operate and cool the bottom side of the first conveyor belt 11 through the cooling device to reduce the temperature of the conveyor belt, thereby maintaining the effectiveness of the cooling effect; at the same time, the intelligent temperature control of the monitoring unit can adjust the operation of the cooling unit as needed, avoiding unnecessary energy consumption, and achieving energy efficiency and optimal utilization of resources.

[0070] As an embodiment of the present invention, the cooling unit 80 includes a cooling frame 81, the second conveyor belt 13 is arranged in the middle of the cooling frame 81, and the inner cavity of the cooling frame 81 is located at the upper and lower sides of the second conveyor belt 13 and is provided with cooling devices 82;

[0071] Specifically, the cooling unit 80 achieves a comprehensive cooling effect on the upper and lower sides of the cooling frame 81 through the cooling device 82. This design ensures that the contact area between the cooling unit and the conveyor belt is increased, thereby improving the cooling effect, and can evenly provide cooling to the second conveyor belt 13, avoiding uneven temperature distribution, and improving the consistency and stability of the cooling effect.

[0072] Furthermore, the cooling device 82 includes a cooling fan, a refrigerator, and a condenser;

[0073] Specifically, by using different components to perform multi-faceted cooling treatments, the digital coal yard system can adapt to different operating conditions and temperature requirements, and ensure that the conveyor belt always remains within a stable temperature range, improving the system's reliability and long-term operating performance.

[0074] As an embodiment of the present invention, the identification unit 50 includes:

[0075] The thermal imaging camera 51 is used to capture the thermal radiation image of the coal gangue transported on the transport unit 10. The thermal imaging camera 51 is based on the infrared radiation emitted by the object, and the objects at different temperatures emit different infrared radiations. The thermal imaging camera 51 can sense and record the intensity and distribution of these infrared radiations, thereby generating a thermal imaging image;

[0076] An image processing module 52 is used to process the acquired thermal radiation image to extract the thermal radiation characteristics of the object and transmit it to the control unit 60;

[0077] Specifically, the main function of the recognition unit 50 is to monitor and analyze the gangue on the conveying unit 10 in real time through thermal imaging technology. The thermal imaging camera 51 captures the thermal radiation image of the object, and the image processing module 52 processes and extracts the features of the image, and then transmits the result to the control unit 60 so that the system can take appropriate actions based on the recognized information, such as classification, sorting or other control actions. It helps to improve the automation and accuracy of the digital coal yard system, while improving the efficiency and reliability of the system.

[0078] Furthermore, the image processing module 52 includes:

[0079] The preprocessing module 521 is used to preprocess the thermal radiation image to optimize the subsequent processing steps. The preprocessing includes operations such as noise removal, contrast enhancement, and image brightness adjustment to ensure the quality and analyzability of the thermal radiation image.

[0080] Image segmentation module 522 is used to divide the entire thermal radiation image into multiple separate object images. This step is to separate different objects or targets from the entire image in preparation for subsequent target recognition and feature extraction. Image segmentation methods include threshold segmentation, region growing, edge detection, etc.;

[0081] The object recognition module 523 is used to identify the image location and bounding box of each individual object. This step involves detecting and marking objects in the image. Object detection algorithms, such as convolutional neural networks, are usually used to determine the location and shape of each object.

[0082] The feature extraction module 524 extracts temperature features from the identified objects. For thermal imaging images, temperature features are the most common and reflect the temperature distribution of the object. Feature extraction uses various image processing and machine learning techniques, such as regional statistics, histogram analysis, texture feature extraction, etc.

[0083] Specifically, the workflow of the entire image processing module 52 is as follows: First, the thermal imaging camera 51 captures the thermal radiation image of the gangue, and then the preprocessing module 521 performs preliminary processing on the image. Next, the image segmentation module 522 divides the image into multiple object images, and then the target recognition module 523 determines the position and bounding box of each object. Finally, the feature extraction module 524 extracts features such as temperature from each object image, and these features will be transmitted to the control unit 60 for subsequent processing and decision-making. This image processing process helps to accurately analyze the gangue on the conveying unit 10 and extract key information.

[0084] As an embodiment of the present invention, the control logic of the control unit 60 includes the following:

[0085] Given an object (i):

[0086] T avg,i : the average temperature of the object (i);

[0087] T peak,i : the maximum temperature of object (i);

[0088] θ1 and θ2: pre-set temperature thresholds;

[0089] The decision function f(i) is defined as follows:

[0090]

[0091] Output control signal C(i):

[0092]

[0093] Among them, signal A and signal B represent control signals for sorting objects (i) into corresponding collection areas.

[0094] Specifically, based on the control logic, the control unit 60 determines whether the object is coal or gangue by comparing the average temperature and the maximum temperature of the object with the preset threshold value, and generates a control signal accordingly to sort the object to a suitable collection area. This control logic and signal definition helps the digital coal yard system to automatically sort and process coal gangue, and improve the automation and efficiency of the system.

[0095] As an embodiment of the present invention, the sorting unit 70 includes a mechanical arm and a pneumatic device;

[0096] Specifically, through the coordinated operation of the mechanical arm and the pneumatic device, the sorting unit 70 can achieve accurate object sorting and processing. According to the instructions of the control unit 60, the mechanical arm operates through the pneumatic device to accurately grasp and move the identified coal or gangue objects, sorting them to the target location or for further processing. This automated sorting process can improve the efficiency and accuracy of the coal yard system, reduce the need for manual operation, and improve the continuity of the overall workflow.

[0097] Furthermore, the sorting unit 70 further includes a first conveying device 71 and a second conveying device 72, and a first collecting device 711 and a second collecting device 721 are respectively disposed downstream of the first conveying device 71 and the second conveying device 72;

[0098] Specifically, the robotic arm or pneumatic device of the sorting unit 70 sorts the coal or gangue on the conveying unit 10 through the identification unit 50 onto the first conveying device 71 and the second conveying device 72, and then transmits them to the first collecting device 711 and the second collecting device 721 through the first conveying device 71 and the second conveying device 72, ensuring the smooth transmission, sorting and collection of objects during the sorting process, thereby realizing the automation and efficiency of the digital coal yard system.

[0099] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Digital coal yard system, characterized by: include: A conveying unit (10) for conveying the coal gangue to be sorted; A feeding unit (20) is arranged upstream of the conveying unit (10) and is used to supply coal gangue to the conveying unit (10); A heating unit (30) is arranged downstream of the feeding unit (20) and is used to heat the coal gangue transported by the transport unit (10) so as to generate heat radiation characteristics; An identification unit (50) is arranged downstream of the heating unit (30) and is used to identify the coal gangue that generates thermal radiation characteristics and send the identification result to the control unit (60), and the control unit (60) sends a control signal according to the identification result and the control logic; A sorting unit (70), arranged downstream of the identification unit (50), is used to receive a control signal from the control unit (60) to sort the coal gangue; The cooling unit (80) is arranged on the bottom side of the conveying unit (10) and is used to cool the conveying belt of the conveying unit (10) to prevent the conveying belt temperature from affecting the identification processing of the coal gangue by the identification unit (50).

2. The digital coal yard system according to claim 1 is characterized in that: The conveying unit (10) comprises a first conveying belt (11) and a second conveying belt (13); the second conveying belt (13) is arranged outside the first conveying belt (11); the first conveying belt (11) is supported and driven by a plurality of first rollers (12); the second conveying belt (13) is supported by a plurality of first rollers (12) that support and drive the first conveying belt (11); and one side is supported by the second conveying belt (13) so that a separation section is generated between the second conveying belt (13) and the second roller (14); and the cooling unit (80) is arranged at the separation section.

3. The digital coal yard system according to claim 2 is characterized in that: The system further comprises a monitoring unit (90), which is arranged on one side of the separation section and connected to the cooling unit (80) for monitoring the temperature of the second conveyor belt (13) at the separation section and controlling the operation of the cooling unit (80) according to a temperature threshold.

4. The digital coal yard system according to claim 3 is characterized in that: The cooling unit (80) comprises a cooling frame (81), the second conveyor belt (13) is arranged in the middle of the cooling frame (81), and the inner cavity of the cooling frame (81) is provided with cooling devices (82) on both upper and lower sides of the second conveyor belt (13).

5. The digital coal yard system according to claim 4 is characterized in that: The cooling device (82) comprises a heat dissipation fan, a refrigerator, and a condenser.

6. The digital coal yard system according to claim 1 is characterized in that: The identification unit (50) comprises: A thermal imaging camera (51) for capturing a thermal radiation image of the coal gangue transported on the transport unit (10); The image processing module (52) is used to process the acquired thermal radiation image to extract the thermal radiation characteristics of the object and transmit the result to the control unit (60).

7. The digital coal yard system according to claim 6 is characterized in that: The image processing module (52) comprises: A preprocessing module (521), used for preprocessing the thermal radiation image to optimize subsequent processing steps; An image segmentation module (522), used for dividing the entire thermal radiation image into a plurality of separate object images; An object recognition module (523) for identifying each individual object image location and bounding box; The feature extraction module (524) extracts temperature features from the identified object.

8. The digital coal yard system according to claim 6 is characterized in that: The control logic of the control unit (60) includes the following: Given an object (i): T avg,i : the average temperature of the object (i); T peak,i : the maximum temperature of object (i); θ1 and θ2: pre-set temperature thresholds; The decision function f(i) is defined as follows: Output control signal C(i): Among them, signal A and signal B represent control signals for sorting objects (i) into corresponding collection areas.

9. The digital coal yard system according to claim 8, characterized in that: The sorting unit (70) comprises a robotic arm and a pneumatic device; the sorting unit (70) further comprises a first conveying device (71) and a second conveying device (72), wherein a first collecting device (711) and a second collecting device (721) are respectively arranged downstream of the first conveying device (71) and the second conveying device (72).

10. The digital coal yard system according to claim 1, characterized in that: The system further comprises a flattening unit (40), wherein the flattening unit (40) is arranged between the heating unit (30) and the identification unit (50), and the flattening unit (40) comprises a flattening frame (41), wherein a flattening plate (42) which is gradually inclined downward from front to back is arranged on the upper part of the flattening frame (41), wherein the upper end of the flattening plate (42) is rotatably connected in the flattening frame (41), and a spring (43) is fixedly connected between the lower end of the flattening plate (42) and the inner top wall of the flattening frame (41).

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