Methods, devices, storage media, and products for determining the location of water lines.

Abstract

This disclosure relates to a method, apparatus, storage medium, and product for determining the position of a waterline, and pertains to the field of papermaking technology. The method for determining the position of the waterline includes: acquiring electrical signals from two preset measuring points in the pulp on the wire section, and electrical signals from multiple alternative positions between the measuring points; determining the position of the waterline in the pulp on the wire section from multiple alternative positions based on the positions of the measuring points, the electrical signals at the measuring points, the position of the waterline, a first relationship between the electrical signals at the waterline, and the electrical signals from the multiple alternative positions. This disclosure utilizes electrical signals in the pulp to determine the position of the waterline, quantifying the position of the waterline, thereby improving the accuracy of the determined waterline position. Dewatering the pulp based on the accurate position of the waterline enables precise control of the degree of dewatering.

Description

Technical Field

[0001] This disclosure relates to the field of papermaking technology, and in particular to a method, apparatus, storage medium, and product for determining the position of the water line. Background Technology

[0002] In the papermaking process, the dewatering of the pulp on the wire affects the thickness, density, and other properties of the paper. When the pulp is sprayed onto the wire, it reflects water like a mirror. As dewatering progresses, the reflection disappears, and a clear boundary line appears on the wire, commonly referred to as the waterline on a paper machine. The dewatering process can be controlled by adjusting the position of the waterline. However, currently, determining the optimal position of the waterline is mostly done visually using traditional methods, and there is no direct detection method. Summary of the Invention

[0003] One of the technical problems this disclosure aims to solve is: how to improve the accuracy of the determined waterline position.

[0004] According to a first aspect of some embodiments of the present disclosure, a method for determining the position of a waterline is provided, comprising: acquiring electrical signals at two preset measuring points in the slurry on the mesh section, and electrical signals at a plurality of alternative positions between the measuring points; and determining the position of the waterline of the slurry on the mesh section from the plurality of alternative positions based on the position of the measuring points, the electrical signals at the measuring points, the position of the waterline, a first relationship between the electrical signals at the waterline, and the electrical signals at the plurality of alternative positions.

[0005] In some embodiments, determining the position of the waterline of the slurry on the mesh section from multiple candidate positions based on the position of the measuring point, the electrical signal at the measuring point, the position of the waterline, a first relationship between the electrical signal at the waterline, and the electrical signals at multiple candidate positions includes: determining a second relationship between the position of the waterline of the slurry on the mesh section and the electrical signal at the waterline based on the first relationship, the position of the measuring point, and the electrical signal at the measuring point; and determining the candidate position that satisfies the second relationship among the multiple candidate positions and their electrical signals as the position of the waterline of the slurry on the mesh section.

[0006] In some embodiments, the method for determining the position of the waterline further includes: acquiring historical data, wherein the historical data includes multiple data entries, each data entry including electrical signals at two preset measuring points, the position of the waterline, and the electrical signal at the waterline during a dewatering process of the slurry on the mesh, and the two preset measuring points are located on both sides of the position of the waterline; and determining a first relationship between the position of the measuring points, the electrical signal at the measuring points, the position of the waterline, and the electrical signal at the waterline based on the historical data.

[0007] In some embodiments, the two preset measuring points are a first measuring point and a second measuring point, and the electrical signal at the waterline in the first relationship is positively correlated with the difference between the electrical signal at the second measuring point and the electrical signal at the first measuring point.

[0008] In some embodiments, in the first relationship, the electrical signal at the position of the waterline is the sum of the electrical signal at the first measuring point and the first calculation part, the first calculation part is the product of the second calculation part and the third calculation part, wherein the second calculation part is the ratio of the difference between the electrical signals of the second measuring point and the first measuring point to the difference between the positions of the second measuring point and the first measuring point, and the third calculation part is the difference between the position of the waterline and the position of the first measuring point.

[0009] In some embodiments, acquiring electrical signals at two preset measuring points and electrical signals at multiple alternative locations between the measuring points in the slurry on the mesh section includes: supplying power to the mesh section using a wire connector fixed below the mesh section and parallel to the length direction of the mesh section; and acquiring electrical signals at the two preset measuring points and electrical signals at multiple alternative locations between the measuring points in the slurry on the mesh section after power supply.

[0010] In some embodiments, acquiring the electrical signals of two preset measuring points and the electrical signals of multiple alternative positions between the measuring points in the slurry on the mesh further includes: converting the electrical signals of the two preset measuring points and the electrical signals of multiple alternative positions between the measuring points into preset analog signals by a signal conversion device, wherein the preset analog signals are 4-20 mA signals or 0-10 V signals.

[0011] According to a second aspect of some embodiments of the present disclosure, a device for determining the position of a waterline is provided, comprising: an acquisition module configured to acquire electrical signals at two preset measuring points in the slurry on a mesh section, and electrical signals at a plurality of alternative positions between the measuring points; and a determination module configured to determine the position of the waterline of the slurry on the mesh section from a plurality of alternative positions based on the positions of the measuring points, the electrical signals at the measuring points, the position of the waterline, a first relationship between the electrical signals at the waterline, and the electrical signals at the plurality of alternative positions.

[0012] According to a third aspect of some embodiments of the present disclosure, an apparatus for determining the position of a waterline is provided, comprising: a processor; and a memory coupled to the processor for storing instructions, which, when executed by the processor, cause the processor to perform the waterline position determination method as described above.

[0013] According to a fourth aspect of some embodiments of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon, wherein the program, when executed by a processor, implements the method for determining the position of the waterline as described above.

[0014] According to a fifth aspect of some embodiments of the present disclosure, a computer program product is provided, including instructions that, when executed by a processor, cause the processor to perform the method for determining the position of the waterline as described above.

[0015] This disclosure, after acquiring electrical signals from two preset measuring points in the slurry on the screen and electrical signals from multiple alternative locations between the measuring points, determines the position of the waterline in the slurry on the screen from multiple alternative locations based on the position of the measuring points, the electrical signal at the measuring points, the position of the waterline, and a first relationship between the electrical signals at the waterline and the position of the waterline. This disclosure utilizes electrical signals in the slurry to determine the position of the waterline, quantifying the position of the waterline, thereby improving the accuracy of the determined waterline position. Dewatering the slurry based on the accurate waterline position enables precise control of the degree of slurry dewatering.

[0016] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the waterline of a slurry according to some embodiments of the present disclosure is shown.

[0019] Figure 2 A flowchart illustrating a method for determining the position of a waterline according to some embodiments of the present disclosure is shown.

[0020] Figure 3 A schematic diagram of a device for determining the position of a waterline according to some embodiments of the present disclosure is shown.

[0021] Figure 4 A schematic diagram of a device for determining the position of a waterline according to other embodiments of the present disclosure is shown.

[0022] Figure 5 A schematic diagram of a device for determining the position of a waterline according to some embodiments of the present disclosure is shown. Detailed Implementation

[0023] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0024] In the papermaking process, after the pulp enters the paper machine, it is dewatered through the wire section. After dewatering, it undergoes pressing, drying, and other steps to form paper. The dewatering of the pulp in the wire section affects the thickness, density, and other properties of the subsequent paper formation, so it is necessary to precisely control the dewatering process.

[0025] When the pulp stream (slurry) is first sprayed onto the wire of the paper machine, the wire is partially reflected by the water, like a mirror. As dewatering proceeds, the reflection disappears, and a distinct boundary line appears on the clean section, commonly referred to as the waterline on the paper machine.

[0026] The position of the water line indicates the moisture content of the wet paper. A forward-moving water line indicates low moisture content, while a backward-moving water line indicates high moisture content.

[0027] The vacuum desiccant in the paper machine also affects the position of the water line. A higher vacuum level in the desiccant results in more pronounced dehydration, causing the water line (water level line) to move forward, shortening its distance from the wire. Conversely, a lower water line (water level line) will move backward, lengthening its distance from the wire.

[0028] In addition, the amount of pulp loaded into the flow box of the paper machine is large and the speed is fast. If dewatering is not timely, the distance between the water line and the wire will become longer.

[0029] Obtaining the water line position information helps operators make corresponding adjustments to the paper machine's wire section. By controlling the water line position, the dewatering effect of the pulp on the wire can be adjusted.

[0030] Figure 1 A schematic diagram of the waterline of a slurry according to some embodiments of the present disclosure is shown. Figure 1 As shown, 110 represents the cross-section of the mesh along its length, 120 represents the cross-section of the slurry along its length, and 130 represents the position of the waterline. Figure 1 The thickness of the pulp before dewatering is 'a', and the thickness after dewatering is 'b'. The thickness of the pulp (wet paper) after dewatering is determined based on the position of the waterline; therefore, the dewatering process of the pulp can be controlled by determining the position of the waterline.

[0031] Figure 2 A flowchart illustrating a method for determining the position of a waterline according to some embodiments of this disclosure is provided. Figure 2 As shown, the method of this embodiment includes steps S202 to S204.

[0032] In step S202, electrical signals from two preset measuring points in the slurry on the mesh section, as well as electrical signals from multiple alternative positions between the measuring points, are acquired.

[0033] Two measuring points are preset on the mesh section. The electrical signal between the two measuring points is detected, and the position of the water line is determined based on the electrical signal between the two measuring points. In some embodiments, these two preset measuring points are determined based on historical experience or historical data analysis. For example, an area that is usually identified as the position of the water line in historical production processes is determined, and the position of the measuring points is determined based on this area.

[0034] like Figure 1 As shown, measuring point 1 and measuring point 2 are examples of two preset measuring points. The line connecting measuring point 1 and measuring point 2 is perpendicular to the outer surface of the mesh, and there are multiple alternative positions between measuring point 1 and measuring point 2. By detecting the electrical signal between measuring point 1 and measuring point 2, the position 130 of the water line can be determined. That is, the position of the water line is determined from the multiple alternative positions between measuring point 1 and measuring point 2.

[0035] In some embodiments, the candidate locations are several predetermined locations between measuring point 1 and measuring point 2. For example, locations that may be waterlines can be obtained as candidate locations based on historical experience or historical data analysis. In some embodiments, the candidate locations are any locations between measuring point 1 and measuring point 2. That is, the candidate locations are not predetermined, and any location between measuring point 1 and measuring point 2 can be used as a candidate location when determining the location of the waterline based on the electrical signal between measuring point 1 and measuring point 2.

[0036] In some embodiments, acquiring electrical signals at two preset measuring points and electrical signals at multiple alternative locations between the measuring points in the slurry on the mesh section includes: supplying power to the mesh section using a wire connector fixed below the mesh section and parallel to the length direction of the mesh section; and acquiring electrical signals at the two preset measuring points and electrical signals at multiple alternative locations between the measuring points in the slurry on the mesh section after power supply.

[0037] For example, by using wires to supply power to the screen section through a safe voltage power adapter, the electrical signals at various locations in the screen section can be detected by utilizing the conductivity of the slurry.

[0038] In some embodiments, acquiring the electrical signals of two preset measuring points and the electrical signals of multiple alternative positions between the measuring points in the slurry on the mesh further includes: converting the electrical signals of the two preset measuring points and the electrical signals of multiple alternative positions between the measuring points into preset analog signals by a signal conversion device, wherein the preset analog signals are 4-20 mA signals or 0-10 V signals.

[0039] Converting electrical signals into conventional, recognizable analog signals reduces the difficulty of analysis and facilitates subsequent determination of the waterline's location. In some embodiments, the electrical signals between measuring points are connected to an isolation module (signal conversion device). This module converts the electrical signals into 4-20 mA signals, which are then acquired by the artificial intelligence module of a Programmable Logic Controller (PLC) (or signal acquisition device) and displayed in a Distributed Control System (DCS). Alternatively, a digital display that acquires 4-20 mA input signals can be used to display the data at the work site. The output of this electrical signal data also lays the data foundation for the implementation of automatic control and regulation.

[0040] In some embodiments, the positions of the preset measuring points are determined based on the positions of the water lines during multiple historical dewatering processes. The two preset measuring points are located on either side of these water line positions to detect the electrical signals before and after the water line, and the position of the water line is determined by the changes in these electrical signals. In some embodiments, the two preset measuring points are fixed within the same paper machine; if their positions are adjusted, recalibration is required.

[0041] In some embodiments, the electrical signals at two measuring points and multiple alternative locations between the two measuring points are obtained based on the potential difference created between the two measuring points after applying a safe voltage between them. Furthermore, when the resistance between the two measuring points is relatively stable, the current is relatively stable, and therefore the water line is relatively stable, meaning the water line position can be determined. When the resistance changes, the current between the measuring points changes accordingly, and the water line position changes accordingly.

[0042] In some embodiments, the candidate locations can be determined based on historical data, such as by statistically analyzing the positions of waterlines in historical data to identify multiple candidate locations. In some embodiments, the candidate location can be any location between two measuring points, meaning that the electrical signal is actually acquired at any location between the two measuring points.

[0043] In some embodiments, before determining the position of the water line using the electrical signal of the slurry, the resistance of the slurry is detected during production without affecting the slurry formation. For example, a multimeter is used to detect that the resistance of the slurry changes before and after the water line. According to Ohm's law, voltage equals resistance multiplied by current; when the resistance changes, the current signal changes accordingly. Therefore, the position of the water line can be determined by detecting the electrical signal in the slurry while supplying power to the mesh section.

[0044] By capturing electrical signals, changes in slurry dewatering are reflected in real time, thus indicating changes in the water level. Therefore, it can replace traditional visual methods, facilitating operation and adjustment, and reducing the skill requirements for operators.

[0045] In step S204, the position of the water line of the slurry on the mesh is determined from multiple candidate positions based on the position of the measuring point, the electrical signal at the measuring point, the position of the water line, the first relationship between the electrical signal at the water line, and the electrical signals at multiple candidate positions.

[0046] In some embodiments, historical data is acquired, wherein the historical data includes multiple data entries, each data entry including electrical signals at two preset measuring points, the position of the water line, and the electrical signal at the water line during a dewatering process of the slurry on the mesh, and the two preset measuring points are located on both sides of the position of the water line; based on the historical data, a first relationship is determined between the position of the measuring points, the electrical signal at the measuring points, the position of the water line, and the electrical signal at the water line.

[0047] In some embodiments, data analysis tools are used to fit the location of the measuring point, the electrical signal at the measuring point, the location of the water line, and the electrical signal at the water line in historical data to determine a first relationship between the location of the measuring point, the electrical signal at the measuring point, the location of the water line, and the electrical signal at the water line.

[0048] In some embodiments, each type of slurry corresponds to a first relationship. That is, the type of slurry in the acquired historical data is the same as the type of slurry currently in use. Different types of slurries require different dewatering conditions, so having a first relationship for each type of slurry allows for a more accurate determination of the appropriate waterline position.

[0049] In some embodiments, the two preset measuring points are a first measuring point and a second measuring point, and the electrical signal at the waterline in the first relationship is positively correlated with the difference between the electrical signal at the second measuring point and the electrical signal at the first measuring point.

[0050] In some embodiments, the change in the position of the waterline can be represented by the ratio of the difference between the electrical signals of the second measuring point and the first measuring point to the difference between the positions of the second measuring point and the first measuring point. For example, the change in the position of the waterline can be represented by formula (1).

[0051] f(s)=n*(M2-M1) / (S2-S1) (1)

[0052] Where M1 represents the electrical signal at the first measuring point, S1 represents the position of the first measuring point, M2 represents the electrical signal at the first measuring point, S2 represents the position of the first measuring point, n is a parameter, and f(s) represents the change in the position of the water line.

[0053] In some embodiments, in the first relationship, the electrical signal at the position of the waterline is the sum of the electrical signal at the first measuring point and the first calculation part, the first calculation part is the product of the second calculation part and the third calculation part, wherein the second calculation part is the ratio of the difference between the electrical signals of the second measuring point and the first measuring point to the difference between the positions of the second measuring point and the first measuring point, and the third calculation part is the difference between the position of the waterline and the position of the first measuring point.

[0054] For example, the first relation can be expressed as formula (2):

[0055] f(x)=M1+(M2-M1) / (S2-S1)*(x-S1) (2)

[0056] Where x represents the position of the waterline, and f(x) represents the electrical signal at the position of the waterline.

[0057] In some embodiments, determining the position of the waterline of the slurry on the mesh section from multiple candidate positions based on the position of the measuring point, the electrical signal at the measuring point, the position of the waterline, a first relationship between the electrical signal at the waterline, and the electrical signals at multiple candidate positions includes: determining a second relationship between the position of the waterline of the slurry on the mesh section and the electrical signal at the waterline based on the first relationship, the position of the measuring point, and the electrical signal at the measuring point; and determining the candidate position that satisfies the second relationship among the multiple candidate positions and their electrical signals as the position of the waterline of the slurry on the mesh section.

[0058] For example, for formula (2), after determining the values ​​of S1, S2, M1, and M2, the relationship between f(x) and x can be obtained, and the position of the candidate position and the position whose electrical signal satisfies the relationship between f(x) and x can be determined as the position of the waterline.

[0059] In some embodiments, it is actually possible to obtain the electrical signal at any position between the first measuring point and the second measuring point. That is, any position between the first measuring point and the second measuring point can be used as a candidate position to determine whether it satisfies the relationship between f(x) and x.

[0060] By utilizing the relationship between the electrical signals in the slurry and the position of the water line, the position of the water line can be determined. This allows for the quantification of the water line position, facilitating accurate positioning and replacing the traditional visual method of controlling dewatering. It also reduces the workload for operators and saves human resources.

[0061] After the position of the water line is determined based on the electrical signal of the pulp, it helps the operator to make corresponding adjustments to the wire section of the paper machine to ensure the precise dewatering process of the pulp, which facilitates the subsequent formation of paper with qualified characteristics such as thickness and density.

[0062] This disclosure, after acquiring electrical signals from two preset measuring points in the slurry on the screen and electrical signals from multiple alternative locations between the measuring points, determines the position of the waterline in the slurry on the screen from multiple alternative locations based on the position of the measuring points, the electrical signal at the measuring points, the position of the waterline, and a first relationship between the electrical signals at the waterline and the position of the waterline. This disclosure utilizes electrical signals in the slurry to determine the position of the waterline, quantifying the position of the waterline, thereby improving the accuracy of the determined waterline position. Dewatering the slurry based on the accurate waterline position enables precise control of the degree of slurry dewatering.

[0063] Figure 3 A schematic diagram of a device for determining the position of a waterline according to some embodiments of the present disclosure is shown. Figure 3 As shown, the waterline position determining device 30 includes:

[0064] The acquisition module 310 is configured to acquire electrical signals at two preset measuring points in the slurry on the mesh, as well as electrical signals at multiple alternative locations between the measuring points.

[0065] The determining module 320 is configured to determine the position of the waterline of the slurry on the mesh section from the plurality of candidate positions based on the position of the measuring point, the electrical signal at the measuring point, the position of the waterline, a first relationship between the electrical signal at the waterline, and the electrical signal at the plurality of candidate positions.

[0066] In some embodiments, the determining module 320 is configured to determine a second relationship between the position of the waterline of the slurry on the mesh and the electrical signal at the waterline, based on a first relationship, the position of the measuring point, and the electrical signal at the measuring point; and to determine the candidate position that satisfies the second relationship among the plurality of candidate positions and their electrical signals as the position of the waterline of the slurry on the mesh.

[0067] In some embodiments, the waterline position determination device 30 is further configured to acquire historical data, wherein the historical data includes multiple data entries, each data entry including electrical signals at two preset measuring points, the position of the waterline, and the electrical signal at the waterline during a dewatering process of the slurry on the mesh section, and the two preset measuring points are located on both sides of the position of the waterline; based on the historical data, a first relationship is determined between the position of the measuring points, the electrical signal at the measuring points, the position of the waterline, and the electrical signal at the waterline.

[0068] In some embodiments, the two preset measuring points are a first measuring point and a second measuring point, and the electrical signal at the waterline in the first relationship is positively correlated with the difference between the electrical signal at the second measuring point and the electrical signal at the first measuring point.

[0069] In some embodiments, in the first relationship, the electrical signal at the position of the waterline is the sum of the electrical signal at the first measuring point and the first calculation part, the first calculation part is the product of the second calculation part and the third calculation part, wherein the second calculation part is the ratio of the difference between the electrical signals of the second measuring point and the first measuring point to the difference between the positions of the second measuring point and the first measuring point, and the third calculation part is the difference between the position of the waterline and the position of the first measuring point.

[0070] In some embodiments, the acquisition module 310 is configured to supply power to the mesh section using a wire connector fixed below the mesh section and parallel to the length direction of the mesh section; and to acquire electrical signals from two preset measuring points in the slurry on the mesh section after power supply, as well as electrical signals from multiple alternative positions between the measuring points.

[0071] In some embodiments, the acquisition module 310 is configured to convert the electrical signals of two preset measurement points and the electrical signals of multiple alternative locations between the measurement points into preset analog signals through a signal conversion device, wherein the preset analog signals are 4-20 mA signals or 0-10 V signals.

[0072] The apparatus of this disclosure, after acquiring electrical signals from two preset measuring points in the slurry on the mesh section, and electrical signals from multiple alternative positions between the measuring points, determines the position of the waterline in the slurry on the mesh section from the multiple alternative positions based on the position of the measuring points, the electrical signal at the measuring points, the position of the waterline, and a first relationship between the electrical signals at the waterline. The apparatus of this disclosure uses electrical signals in the slurry to determine the position of the waterline, quantifies the position of the waterline, and thus provides accurate determination of the waterline position. Dewatering the slurry based on the accurate position of the waterline enables precise control of the degree of slurry dewatering.

[0073] The device for determining the position of the waterline in the embodiments of this disclosure can be implemented by various computing devices or computer systems, as described below. Figure 4 as well as Figure 5 Describe it.

[0074] Figure 4 A schematic diagram of a device for determining the position of a waterline according to other embodiments of this disclosure is shown. For example... Figure 4 As shown, the apparatus 40 of this embodiment includes a memory 410 and a processor 420 coupled to the memory 410. The processor 420 is configured to execute a method for determining the position of the waterline in any of the embodiments of this disclosure based on instructions stored in the memory 410.

[0075] The memory 410 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory stores, for example, the operating system, application programs, boot loader, database, and other programs.

[0076] Figure 5 A schematic diagram of a device for determining the position of a waterline according to some embodiments of the present disclosure is shown. Figure 5 As shown, the device 50 in this embodiment includes a memory 510 and a processor 520, which are similar to the memory 410 and processor 420, respectively. It may also include an input / output interface 530, a network interface 540, a storage interface 550, etc. These interfaces 530, 540, 550, and the memory 510 and processor 520 can be connected, for example, via a bus 560. The input / output interface 530 provides a connection interface for input / output devices such as a display, mouse, keyboard, and touchscreen. The network interface 540 provides a connection interface for various networked devices, such as connecting to a database server or cloud storage server. The storage interface 550 provides a connection interface for external storage devices such as SD cards and USB flash drives.

[0077] Embodiments of this disclosure also provide a computer-readable storage medium having a computer program stored thereon, characterized in that, when executed by a processor, the program implements any of the aforementioned methods for determining the position of the waterline.

[0078] Embodiments of this disclosure also provide a computer program product, including instructions that, when executed by a processor, cause the processor to perform any of the aforementioned methods for determining the position of a waterline.

[0079] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0080] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0081] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0082] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0083] The above description is only a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A method for determining the position of a waterline, comprising: Acquire electrical signals from two preset measuring points in the slurry on the mesh, as well as electrical signals from multiple alternative locations between the two preset measuring points; Acquire historical data, wherein the historical data includes multiple data entries, each data entry including the electrical signals of the two preset measuring points, the position of the water line, and the electrical signal at the water line during a dewatering process of the slurry on the mesh section, and the two preset measuring points are located on both sides of the position of the water line; Based on the historical data, a first relationship is determined between the positions of the two preset measuring points, the electrical signals of the two preset measuring points, the position of the waterline, and the electrical signal of the waterline position. The two preset measuring points are the first measuring point and the second measuring point. In the first relationship, the electrical signal of the waterline position is the sum of the electrical signal of the first measuring point and a first calculation part. The first calculation part is the product of a second calculation part and a third calculation part. The second calculation part is the ratio of the difference between the electrical signals of the second measuring point and the first measuring point to the difference between the position of the second measuring point and the position of the first measuring point. The third calculation part is the difference between the position of the waterline and the position of the first measuring point. Based on the first relationship and the positions of the two preset measuring points and the electrical signals of the two preset measuring points, a second relationship is determined between the position of the water line of the slurry on the mesh and the electrical signal of the water line position. The candidate position that satisfies the second relationship among the plurality of candidate positions and their electrical signals is determined as the position of the water line of the slurry on the mesh section.

2. The method of claim 1, wherein, The electrical signals at two preset measuring points and the electrical signals at multiple alternative locations between the two preset measuring points in the slurry on the mesh include: The power supply to the mesh section is provided by a wire connector fixed below the mesh section and parallel to the length direction of the mesh section; The electrical signals of two preset measuring points in the slurry on the power supply section, as well as the electrical signals of multiple alternative positions between the two preset measuring points, are acquired.

3. The method of claim 2, wherein, The acquisition of electrical signals at two preset measuring points and electrical signals at multiple alternative locations between the two preset measuring points in the slurry on the mesh section further includes: The electrical signals at the two preset measurement points and the electrical signals at multiple alternative locations between the two preset measurement points are converted into preset analog signals by a signal conversion device. The preset analog signals are 4-20 mA signals or 0-10 V signals.

4. A device for determining the position of a waterline, comprising: The acquisition module is configured to acquire electrical signals at two preset measuring points in the slurry on the mesh, as well as electrical signals at multiple alternative locations between the two preset measuring points. The determining module is configured to determine the position of the waterline of the slurry on the mesh from the plurality of candidate positions based on the positions of the two preset measuring points, the electrical signals of the two preset measuring points, the position of the waterline, a first relationship between the electrical signals at the waterline, and the electrical signals at the plurality of candidate positions. The determining device is used to implement the method for determining the position of the waterline as described in any one of claims 1 to 3.

5. A device for determining the position of a waterline, comprising: processor; as well as A memory coupled to the processor is used to store instructions that, when executed by the processor, cause the processor to perform the method for determining the position of the waterline as described in any one of claims 1 to 3.

6. A computer readable storage medium having stored thereon a computer program, wherein, When executed by the processor, the program implements the method for determining the position of the waterline as described in any one of claims 1 to 3.

7. A computer program product comprising instructions that, when executed by a processor, cause the processor to perform the method for determining the position of a waterline according to any one of claims 1 to 3.

Images