Attitude regulation and control method for vibrating screen

Abstract

The invention discloses a posture regulation and control method for a vibrating screen, which comprises the following steps of: acquiring an image containing a screen surface area of the whole vibrating screen in real time, and diagnosing whether a slurry leakage phenomenon exists or is close to the slurry leakage phenomenon or not according to the image of the screen surface area; when slurry leakage occurs or is close to the slurry leakage, the height of the outlet end of the first vibrating screen is adjusted by controlling the hydraulic cylinder of the first vibrating screen to ascend and descend. According to the invention, the initiative and intelligence of adjusting the posture of the vibrating screen are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibrating screen control, and in particular to a posture control method for a vibrating screen. Background Art

[0002] Clean drilling fluid is the lifeblood of drilling operations. The drilling vibrating screen is the most critical first-level drilling fluid purification equipment and an essential first-level solid control equipment in oil solid-liquid separation. It is mainly used to handle larger drill cuttings particles in oil production. The drilling fluid vibrating screen has the characteristics of high vibration intensity and adjustable screen box angle.

[0003] In actual application, affected by the properties of drilling fluid, cuttings, vibrating screen performance, etc., it is easy to cause screen blockage, screen sticking and slurry leakage during operation. The staff needs to pay attention to the flow of drilling fluid on the screen surface at all times and adjust the inclination of the vibrating screen according to experience to prevent slurry leakage. However, manual operation has a great impact on the working efficiency of the vibrating screen, and subjective factors such as the proficiency of personnel in controlling the machine will also affect the output effect of the vibrating screen.

[0004] Therefore, the prior art needs to propose corresponding solutions to the problems of work efficiency and effect caused by the current manual adjustment of the vibrating screen. Summary of the invention

[0005] One of the technical problems to be solved by the present invention is the need to provide a technical solution that can actively control the posture of the vibrating screen.

[0006] In order to solve the above-mentioned technical problems, an embodiment of the present application proposes a posture control method for a vibrating screen, comprising: real-time acquisition of an image containing the entire vibrating screen surface area, and diagnosing whether there is currently a pulp running or a pulp running phenomenon based on the screen surface area image; when pulp running or pulp running is near, adjusting the height of the outlet end of the first vibrating screen by controlling the lifting and lowering of the hydraulic cylinder of the first vibrating screen.

[0007] Preferably, the posture control method, in the process of diagnosing whether there is currently a slurry leakage phenomenon, includes: based on the screen surface area image, using a pre-constructed area division model to identify different types of areas in the image, so as to determine the proportion of different types of areas in the screen surface area image compared to the entire image; by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a first proportion, determining whether a slurry leakage phenomenon is currently occurring, wherein the first proportion is 90%.

[0008] Preferably, the posture control method, in the process of diagnosing whether there is an imminent slurry run phenomenon, includes: based on the screen surface area image, using a pre-constructed area division model to identify different types of areas in the image, so as to determine the proportion of different types of areas in the screen surface area image compared to the entire image; by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a second proportion, determining whether there is an imminent slurry run phenomenon, wherein the second proportion is 80%.

[0009] Preferably, the posture control method collects a historical image set of the screen surface area image, and marks the blank area, mudstone area, sandstone area and drilling fluid liquid area for each historical image, so that the original historical image set is used as training input data, and the historical image set of the marked area is used as training output data; a basic neural network model is established, and the basic neural network model is trained using the training input data and the training output data, using a convolutional neural network algorithm, so as to obtain the area division model after the training is completed.

[0010] Preferably, the posture control method, in the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen when slurry leakage or near slurry leakage occurs, includes: when slurry leakage or near slurry leakage is detected, gradually raising the outlet height of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen to reduce the proportion of the liquid area of ​​the drilling fluid, until it is detected that the proportion of the liquid area of ​​the drilling fluid reaches a third proportion, thereby stopping the lifting of the first vibrating screen by controlling the hydraulic cylinder of the first vibrating screen to stop, wherein the third proportion is 60%.

[0011] Preferably, when it is detected that the proportion of the liquid area of ​​the drilling fluid is lower than the fourth proportion, the posture control method lowers the height of the vibrating screen outlet by controlling the hydraulic cylinder of the first vibrating screen to descend, so that the proportion of the liquid area of ​​the drilling fluid increases until the proportion of the liquid area of ​​the drilling fluid reaches the third proportion, wherein the fourth proportion is 40%.

[0012] Preferably, the posture control method, when slurry leakage occurs or is about to occur, includes the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting and lowering of the hydraulic cylinder of the first vibrating screen: when it is detected that the proportion of blank areas in the screen surface area image is greater than the fifth ratio, and the proportion of the drilling fluid liquid area is lower than the fourth ratio, keeping the outlet height of the first vibrating screen unchanged, wherein the fifth ratio is 50%.

[0013] Preferably, the posture control method, in the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen when slurry leakage occurs or is about to occur, includes: when the height of the first vibrating screen is adjusted to the highest, and it is detected that slurry leakage is still occurring or is about to occur, controlling the second vibrating screen to start, and adjusting the height of the outlet end of the second vibrating screen by controlling the lifting of the hydraulic cylinder of the second vibrating screen.

[0014] Preferably, in the posture control method, when the first vibrating screen and the second vibrating screen are started at the same time and it is detected that the proportion of blank areas in the corresponding screen surface area images is less than a sixth ratio, the second vibrating screen is controlled to be turned off so that only the first vibrating screen is used for operation, wherein the sixth ratio is 20%.

[0015] Preferably, the posture control method uses a monocular visible light camera to capture the image of the screen surface area, wherein the vibrating screen is a hydraulic lifting vibrating screen.

[0016] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects:

[0017] The present invention proposes a posture control method for a vibrating screen. The present invention identifies and analyzes different types of screen surface areas in an image based on machine vision technology, calculates the proportion of each area, and controls the hydraulic cylinder of the vibrating screen according to the proportion of each area, thereby actively preventing the vibrating screen from running out of pulp or near running out of pulp. At the same time, by designing a variety of vibrating screen control strategies, the intelligence of the automatic control function of the vibrating screen in various applicable scenarios is effectively improved.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by implementing the technical solution of the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures and / or processes specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present application or the prior art, and constitute a part of the specification. Among them, the accompanying drawings expressing the embodiments of the present application are used together with the embodiments of the present application to explain the technical solution of the present application, but do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1 It is a schematic diagram of the steps of the posture control method for a vibrating screen according to an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of a specific process of a posture control method for a vibrating screen according to an embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of various additional posture adjustment strategies for vibrating screens when pulp running or near pulp running is detected in the posture control method for vibrating screens according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve corresponding technical effects can be fully understood and implemented accordingly. The embodiments of the present application and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the protection scope of the present invention.

[0024] In addition, the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions. Also, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a sequence different from that here.

[0025] Clean drilling fluid is the lifeblood of drilling operations. The drilling vibrating screen is the most critical first-level drilling fluid purification equipment and an essential first-level solid control equipment in oil solid-liquid separation. It is mainly used to handle larger drill cuttings particles in oil production. The drilling fluid vibrating screen has the characteristics of high vibration intensity and adjustable screen box angle.

[0026] In actual application, affected by the properties of drilling fluid, cuttings, vibrating screen performance, etc., it is easy to cause screen blockage, screen sticking and slurry leakage during operation. The staff needs to pay attention to the flow of drilling fluid on the screen surface at all times and adjust the inclination of the vibrating screen according to experience to prevent slurry leakage. However, manual operation has a great impact on the working efficiency of the vibrating screen, and subjective factors such as the proficiency of personnel in controlling the machine will also affect the output effect of the vibrating screen.

[0027] In order to solve the above problems, the present invention proposes a posture control method for a vibrating screen. The method uses machine vision technology to monitor and analyze the vibrating screen surface, mark each area in the screen surface image, and calculate the proportion of each area, so as to actively control the hydraulic cylinder of the vibrating screen according to the proportion of each area to control the vibrating screen outlet height, thereby preventing pulp running or near pulp running on the vibrating screen surface.

[0028] In the process of implementing the method for controlling the posture of a vibrating screen (also referred to as a "vibrating screen control method") provided by the present invention, a controller and an image acquisition device can be used to actively control the posture of the vibrating screen.

[0029] Figure 1 It is a schematic diagram of the steps of the posture control method for a vibrating screen according to an embodiment of the present application. Figure 2This is a schematic diagram of a specific process of the posture control method for a vibrating screen according to an embodiment of the present application. Figure 1 and Figure 2 , the vibration screen posture control method provided in the embodiment of the present invention is described in detail.

[0030] like Figure 1 As shown, step S110 collects an image including the entire vibrating screen surface area in real time, and diagnoses whether there is pulp leakage or pulp leakage is imminent based on the screen surface area image.

[0031] It should be noted that the vibrating screen described in the embodiment of the present invention (both the first vibrating screen and the second vibrating screen described below) is a hydraulic lifting vibrating screen.

[0032] In one embodiment, in step S110, an image acquisition device acquires an image including the entire vibrating screen surface area in real time, and a controller diagnoses whether pulp leakage or pulp leakage is currently occurring based on the screen surface area image.

[0033] In one embodiment, the image acquisition device uses a monocular visible light camera to acquire images including the entire vibrating screen surface, thereby obtaining a real-time screen surface area image.

[0034] In one embodiment, the controller will first identify different types of areas in the image based on the screen surface area image using a pre-built area division model, thereby determining the proportion of different types of areas in the screen surface area image compared to the entire image; and then determine whether slurry leakage is currently occurring by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a first proportion.

[0035] Specifically, after the image acquisition device acquires an image including the entire vibrating screen surface area, the controller first uses the pre-built area division model to identify different types of areas in the image and automatically marks each area in the process of judging whether the current screen surface has pulp leakage. Then, the controller determines the proportion data of different types of areas, and confirms whether the current vibrating screen surface has pulp leakage according to whether the proportion of the drilling fluid liquid area reaches the first proportion. Among them, the first proportion is 90%.

[0036] In one embodiment, the controller will first identify different types of areas in the image based on the screen surface area image using a pre-built area division model, thereby determining the proportion of different types of areas in the screen surface area image compared to the entire image; and then determine whether the slurry leakage phenomenon is currently occurring by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a second proportion.

[0037] Specifically, after the image acquisition device completes the image acquisition of the entire screen surface, the controller first uses the pre-built area division model to identify different types of areas in the image and automatically marks each area when judging whether the current screen surface has pulp leakage. Then, the controller determines the proportion data of different types of areas, and confirms whether the current vibrating screen surface is close to pulp leakage based on whether the proportion of the drilling fluid liquid area reaches the second proportion. The second proportion is 80%.

[0038] The following is an explanation of the process of constructing the region division model described in the embodiment of the present invention.

[0039] In one embodiment, first, a historical image set of images of the screen surface area is collected, and blank areas, mudstone areas, sandstone areas, and drilling fluid liquid areas are marked for each historical image, so that the original historical image set is used as training input data, and the historical image set of the marked area is used as training output data; then, a basic neural network model is established, and the basic neural network model is trained using the training input data and the training output data, using a convolutional neural network algorithm, so as to obtain a region division model after the training is completed.

[0040] Specifically, a basic neural network model is established. After the image acquisition device collects the screen surface area image set, each historical image in the original historical image set is manually annotated, and then the annotated images are integrated into a training output image set. The original input historical image set is used as input, and the annotated image set is used as output. The convolutional neural network algorithm is used to train the basic neural network model to obtain a regional division model. After the basic neural network model is trained, the model trained by the basic neural network model can automatically identify each screen surface area in the real-time vibrating screen screen image and automatically mark each area. Among them, the manually annotated areas include blank areas, mudstone areas, sandstone areas, and drilling fluid liquid areas.

[0041] In step S120, when the controller detects that pulp leakage occurs or is about to occur, the height of the outlet end of the first vibrating screen is adjusted by controlling the lifting and lowering of the posture adjustment device of the first vibrating screen (ie, the hydraulic cylinder of the first vibrating screen).

[0042] Figure 3 Schematic diagram of various additional posture adjustment strategies for vibrating screens when pulp running or near pulp running is detected in the method for controlling the posture of the vibrating screen in the embodiment of the present application. Figure 3 The additional posture adjustment strategy of the vibrating screen after the pulp leakage or pulp leakage phenomenon is detected in step S110 will be described in detail.

[0043] In the first embodiment, when slurry leakage or near slurry leakage is detected, the outlet height of the first vibrating screen is gradually raised by controlling the hydraulic cylinder of the first vibrating screen to be lifted, so that the proportion of the drilling fluid liquid area decreases, until it is detected that the proportion of the drilling fluid liquid area reaches a third proportion, and then the lifting of the first vibrating screen is stopped by controlling the hydraulic cylinder of the first vibrating screen to stop lifting. Specifically, when the controller detects that slurry leakage or near slurry leakage occurs on the current vibrating screen surface, the outlet height of the first vibrating screen is gradually raised by controlling the hydraulic cylinder of the first vibrating screen to be lifted, so that the height of the vibrating screen outlet end is raised, so that the proportion of the drilling fluid liquid area of ​​the first vibrating screen decreases, until it is detected that the proportion of the drilling fluid liquid area drops to the third proportion, and then the maximum maximum height of the vibrating screen outlet is directly controlled by controlling the hydraulic cylinder of the first vibrating screen to stop lifting. Wherein, the third proportion is 60%.

[0044] In the second embodiment, based on the first embodiment, when the slurry is running or close to running, the controller also detects that the proportion of the drilling fluid liquid area is lower than the fourth ratio, and controls the hydraulic cylinder of the first vibrating screen to descend to reduce the height of the vibrating screen outlet, so that the proportion of the drilling fluid liquid area increases, until the proportion of the drilling fluid liquid area reaches the third ratio. Specifically, when the controller also detects that the proportion of the drilling fluid liquid area on the current screen surface is lower than the fourth ratio, the hydraulic cylinder of the first vibrating screen is controlled to descend to gradually reduce the outlet height of the first vibrating screen, so that the height of the vibrating screen outlet end is reduced, thereby increasing the proportion of the drilling fluid liquid area of ​​the first vibrating screen, until the controller detects that the proportion of the drilling fluid liquid area increases to the third ratio, the controller controls the hydraulic cylinder of the first vibrating screen to stop descending, to control the maximum minimum height of the vibrating screen outlet. Among them, the fourth ratio is 40%.

[0045] In a third embodiment, based on the first or second embodiment, when slurry running or near slurry running is detected, the controller also detects that the proportion of blank areas in the screen surface area image is greater than the fifth ratio and the proportion of drilling fluid liquid areas is lower than the fourth ratio, and the outlet height of the first vibrating screen is kept unchanged. Specifically, when the controller also detects that the proportion of blank areas on the current screen surface area image is higher than the fifth ratio and the drilling fluid area is lower than the fourth ratio, the hydraulic cylinder of the first vibrating screen is controlled to stop lifting to keep the outlet height of the first vibrating screen unchanged, and keep the proportion of blank areas and drilling fluid liquid areas of the first vibrating screen on the entire screen surface. Among them, the fifth ratio is 50%.

[0046] In the fourth embodiment, when the controller detects that the first vibrating screen is adjusted to the highest height and that the screen surface of the first vibrating screen is still experiencing pulp leakage or is close to pulp leakage, the controller controls the second vibrating screen to start, and controls the lifting and lowering of the hydraulic cylinder of the second vibrating screen to adjust the height of the outlet end of the second vibrating screen. Specifically, when the controller controls the outlet end height of the first vibrating screen to reach the highest height, if the controller still detects that pulp leakage or is close to pulp leakage occurs on the screen surface of the first vibrating screen, the controller controls the second vibrating screen to start, and simultaneously controls the lifting and lowering of the hydraulic cylinder of the second vibrating screen to adjust the height of the outlet end of the second vibrating screen.

[0047] It should be noted that the process by which the controller diagnoses whether the second vibrating screen has pulp running or is close to pulp running is consistent with the process by which the controller diagnoses whether the first vibrating screen currently has pulp running or is close to pulp running. Moreover, when pulp running or is close to pulp running occurs on the second vibrating screen, the posture adjustment strategy generated by the controller is also consistent with that when pulp running or is close to pulp running occurs on the first vibrating screen.

[0048] In the fifth embodiment, when the first vibrating screen and the second vibrating screen are started at the same time and the controller also detects that the proportion of blank areas in the corresponding screen surface area images is less than the sixth ratio, the second vibrating screen is controlled to be closed, so that only the first vibrating screen is used for operation. Specifically, when the controller controls the first vibrating screen and the second vibrating screen to start at the same time, and detects that the proportion of blank areas on the images of the first vibrating screen and the second vibrating screen screen area is less than the sixth ratio, the controller controls the second vibrating screen to be closed, leaving only the first vibrating screen to operate. Thus, the controller continues to control the lifting and lowering of the hydraulic cylinder according to the proportion of each area in the screen surface area image of the first vibrating screen, and changes the height of the outlet end of the first vibrating screen. Among them, the sixth ratio is 20%.

[0049] The present invention relates to a posture control method for a vibrating screen. In view of the shortcomings of the existing methods, a hydraulic lifting vibrating screen posture control method based on visual recognition is constructed. The present invention identifies and analyzes different types of screen surface areas in an image based on machine vision technology, calculates the proportion of each area, and controls the hydraulic cylinder of the vibrating screen according to the proportion of each area, thereby actively preventing the vibrating screen from running out of pulp or near running out of pulp. At the same time, by designing a variety of vibrating screen control strategies, the intelligence of the automatic control function of the vibrating screen in various applicable scenarios is effectively improved. In addition, the present invention can greatly reduce the pressure on the project caused by personnel operation problems, reduce the investment in human resources, and improve the initiative and intelligence of the vibrating screen adjustment.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any person familiar with the technology within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0051] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0052] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0053] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A posture control method for a vibrating screen, characterized in that: The method comprises: Collect images of the entire vibrating screen surface area in real time, and diagnose whether there is pulp leakage or imminent pulp leakage based on the screen surface area image; When pulp leakage occurs or is about to occur, the height of the outlet end of the first vibrating screen is adjusted by controlling the lifting of the hydraulic cylinder of the first vibrating screen.

2. The posture control method according to claim 1, characterized in that: The process of diagnosing whether there is pulp leakage at present includes: According to the screen surface area image, different types of areas in the image are identified using a pre-built area division model, so as to determine the proportion of different types of areas in the screen surface area image compared to the entire image; Whether the slurry leakage phenomenon currently occurs is determined by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a first proportion, wherein the first proportion is 90%.

3. The posture control method according to claim 1 or 2, characterized in that: The process of diagnosing whether there is an imminent pulp run includes: According to the screen surface area image, different types of areas in the image are identified using a pre-built area division model, so as to determine the proportion of different types of areas in the screen surface area image compared to the entire image; Whether the near slurry leakage phenomenon is currently occurring is determined by judging whether the proportion of the liquid area of ​​the drilling fluid reaches a second proportion, wherein the second proportion is 80%.

4. The posture control method according to claim 2 or 3, characterized in that: Collecting a historical image set of images of the screen surface area, marking a blank area, a mudstone area, a sandstone area, and a drilling fluid liquid area for each historical image, so that the original historical image set is used as training input data, and the historical image set of the marked area is used as training output data; A basic neural network model is established, and the basic neural network model is trained using the training input data and the training output data and a convolutional neural network algorithm, so as to obtain the region division model after the training is completed.

5. The posture control method according to any one of claims 2 to 4, characterized in that: When pulp leakage occurs or is about to occur, the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen comprises: When slurry leakage or near slurry leakage is detected, the outlet height of the first vibrating screen is gradually raised by controlling the hydraulic cylinder of the first vibrating screen to lift, thereby reducing the proportion of the liquid area of ​​the drilling fluid, until it is detected that the proportion of the liquid area of ​​the drilling fluid reaches a third proportion, thereby stopping the lifting of the first vibrating screen by controlling the hydraulic cylinder of the first vibrating screen to stop, wherein the third proportion is 60%.

6. The posture control method according to claim 5, characterized in that: When it is detected that the proportion of the liquid area of ​​the drilling fluid is lower than the fourth ratio, the height of the vibrating screen outlet is lowered by controlling the hydraulic cylinder of the first vibrating screen to descend, so that the proportion of the liquid area of ​​the drilling fluid increases until the proportion of the liquid area of ​​the drilling fluid reaches the third ratio, wherein the fourth ratio is 40%.

7. The posture control method according to claim 6, characterized in that: When pulp leakage occurs or is about to occur, the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen comprises: When it is detected that the proportion of blank areas in the screen surface area image is greater than the fifth proportion and the proportion of the drilling fluid liquid area is lower than the fourth proportion, the outlet height of the first vibrating screen is kept unchanged, wherein the fifth proportion is 50%.

8. The posture control method according to any one of claims 1 to 7, characterized in that: When pulp leakage occurs or is about to occur, the step of adjusting the height of the outlet end of the first vibrating screen by controlling the lifting of the hydraulic cylinder of the first vibrating screen comprises: When the height of the first vibrating screen is adjusted to the highest and it is detected that slurry leakage is still occurring or is about to occur, the second vibrating screen is controlled to start and the height of the outlet end of the second vibrating screen is adjusted by controlling the lifting of the hydraulic cylinder of the second vibrating screen.

9. The posture control method according to claim 8, characterized in that: When the first vibrating screen and the second vibrating screen are started at the same time and it is detected that the proportion of blank areas in the corresponding screen surface area images is less than the sixth ratio, the second vibrating screen is controlled to be turned off so that only the first vibrating screen is used for operation, wherein the sixth ratio is 20%.

10. The posture control method according to any one of claims 1 to 9, characterized in that: A monocular visible light camera is used to collect the image of the screen surface area, wherein the vibrating screen is a hydraulic lifting vibrating screen.

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