Plunger pump displacement control method and system based on electric control proportion

Abstract

The invention provides a plunger pump displacement control method and system based on an electric control proportion, and relates to the technical field of displacement control, and the plunger pump displacement control method comprises the following steps: fusing results of wear detection and laser scanning on the surfaces of an inner cylinder body and a plunger sliding shoe of a plunger pump to obtain corresponding wear distribution; acquiring metal wear monitoring data when the plunger pump is used, and correcting a fusion result; the technical problems that when the plunger pump is controlled, due to the fact that the adjusting range is limited, the control precision is low, the control effect is poor, the system stability and reliability are affected, and intelligent control is lacked to respond to complex working conditions are solved. The technical effects that the self-adaptive response to complex working conditions is achieved, the displacement of the plunger pump is accurately controlled based on the abrasion analysis of the plunger pump, the performance and reliability of the equipment are improved, and it is ensured that the equipment can accurately and stably operate are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of displacement control, and in particular to a method and system for controlling the displacement of a plunger pump based on an electronically controlled ratio. Background Art

[0002] As the requirements for construction machinery in terms of operating comfort and energy saving continue to increase, the displacement control accuracy and efficiency of the plunger pump, as an important component of the hydraulic system, have become the focus of attention. Although traditional plunger pump displacement control methods, such as load sensing, pressure cut-off and constant torque control, meet basic needs to a certain extent, they still have limitations in control accuracy and efficiency.

[0003] Therefore, the existing plunger pump control methods often have technical problems such as low control accuracy and poor control effect due to limited adjustment range, affecting system stability and reliability, and lack of intelligent control to respond to complex working conditions. Summary of the invention

[0004] The present application provides a plunger pump displacement control method and system based on electronic control proportion, which is used to solve the technical problems that exist in the control of the plunger pump due to the limited adjustment range, resulting in low control accuracy and poor control effect, affecting the stability and reliability of the system, and lack of intelligent control to respond to complex working conditions.

[0005] In view of the above problems, the present application provides a plunger pump displacement control method and system based on electronically controlled proportion.

[0006] In a first aspect, the present application provides a plunger pump displacement control method based on electronically controlled proportion, the method being applied to a plunger pump displacement control system based on electronically controlled proportion, the method comprising:

[0007] Perform surface wear detection on multiple cylinder inner surfaces and multiple plunger sliding shoe outer surfaces in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinders and multiple plunger sliding shoes cooperate with each other to form multiple groups of plunger pairs; perform laser scanning detection on the multiple cylinder inner surfaces and multiple plunger sliding shoe outer surfaces based on laser scanning equipment to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, fuse the multiple visual cylinder wear distributions and multiple visual plunger wear distributions to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions; obtain metal wear monitoring record data of the plunger pump during use, and perform laser scanning detection on the multiple fused cylinder wear distributions and multiple laser plunger wear distributions. The wear distribution and the fused piston wear distribution are corrected to obtain multiple corrected cylinder wear distributions and multiple corrected piston wear distributions; the electronic control instruction for the current displacement control is obtained, and according to the multiple corrected cylinder wear distributions and the multiple corrected piston wear distributions, the control deviation of the displacement control performed by the electronic control instruction is analyzed and obtained, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; according to the amplitude of the control deviation, a decision is made to obtain an optimization amplitude for optimizing the electronic control instruction, the basic swash plate angle is optimized, the optimized electronic control instruction is obtained, and the displacement control is performed, wherein the optimization is performed with the purpose of approaching the actual electronic control displacement ratio of the actual displacement control to the ideal electronic control displacement ratio.

[0008] In a second aspect, the present application provides a plunger pump displacement control system based on electronically controlled proportions, the system comprising:

[0009] A wear detection module is used to perform surface wear detection on multiple cylinder inner surfaces and multiple plunger sliding shoe outer surfaces in the plunger pump, and obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinders and multiple plunger sliding shoes cooperate with each other to form multiple groups of plunger pairs; a laser scanning module is used to perform laser scanning detection on the multiple cylinder inner surfaces and multiple plunger sliding shoe outer surfaces based on a laser scanning device, obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, fuse the multiple visual cylinder wear distributions and multiple visual plunger wear distributions, and obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions; a wear correction module is used to obtain the metal wear monitoring record data of the plunger pump during use, and fuse the multiple fused The combined cylinder wear distribution and the multiple fused plunger wear distributions are corrected to obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions; a deviation analysis module is used to obtain the current electronic control instruction for displacement control, and analyze and obtain the control deviation of the electronic control instruction for displacement control based on the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; an optimization decision module is used to decide on the optimization amplitude for optimizing the electronic control instruction based on the amplitude of the control deviation, optimize the basic swash plate angle, obtain the optimized electronic control instruction, and perform displacement control, wherein the optimization is performed with the purpose of making the actual electronic control displacement ratio of the actual displacement control close to the ideal electronic control displacement ratio.

[0010] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0011] The present application provides a method for controlling the displacement of a piston pump based on an electronically controlled ratio, which performs surface wear detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple piston slides in the piston pump to obtain multiple visual cylinder wear distributions and multiple visual piston wear distributions, wherein the multiple cylinder bodies and the multiple piston slides cooperate with each other to form multiple groups of piston pairs; based on a laser scanning device, laser scanning detection is performed on the inner surfaces of the multiple cylinder bodies and the outer surfaces of multiple piston slides to obtain multiple laser cylinder wear distributions and multiple laser piston wear distributions, and the multiple visual cylinder wear distributions and the multiple visual piston wear distributions are fused to obtain multiple fused cylinder wear distributions and multiple fused piston wear distributions; the metal wear monitoring record data of the piston pump during use is obtained, the multiple fused cylinder wear distributions and the multiple fused piston wear distributions are corrected to obtain multiple corrected cylinder wear distributions and multiple corrected piston wear distributions; the current electronic displacement control is obtained. Control instructions, and according to the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, analyze and obtain the control deviation of the electronic control instruction for displacement control, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; according to the amplitude of the control deviation, a decision is made to obtain the optimization amplitude for optimizing the electronic control instruction, the basic swash plate angle is optimized, and the optimized electronic control instruction is obtained to perform displacement control, wherein the optimization is performed with the purpose of approaching the actual electronic control displacement ratio of the actual displacement control to the ideal electronic control displacement ratio, which solves the technical problems of low control accuracy and poor control effect due to limited adjustment range during plunger pump control, affecting system stability and reliability, and lacking intelligent control to respond to complex working conditions, and achieves the technical effect of adaptively responding to complex working conditions, accurately controlling the displacement of the plunger pump based on the wear analysis of the plunger pump, improving the performance and reliability of the equipment, and ensuring that the equipment can operate accurately and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A flow chart of a method for controlling the displacement of a piston pump based on electronically controlled proportion is provided for this application.

[0013] Figure 2 A schematic diagram of the structure of a piston pump displacement control system based on electronically controlled proportion is provided for this application.

[0014] Explanation of the reference numerals: wear detection module 11 , laser scanning module 12 , wear correction module 13 , deviation analysis module 14 , optimization decision module 15 . DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0016] Embodiment 1

[0017] A plunger pump is a pump that transfers liquids through the reciprocating motion of a plunger in a cylinder. It is widely used in fluid transfer equipment in many fields such as chemical and petroleum, and has the characteristics of large flow, high pressure, and long transfer distance. Its working principle is mainly based on the principle of volume change. During operation, the liquid enters the pump body through the inlet one-way valve. When the plunger moves backward (or downward), the volume in the pump body increases, forming a low-pressure area, which attracts liquid from the inlet into the pump body; when the plunger moves forward (or upward), the volume in the pump body decreases, forming a high-pressure area, which pushes the liquid out of the pump body and discharges it from the one-way outlet valve, thereby completing the fluid transfer. In industrial production, many processes require precise control of liquid flow, and by controlling the displacement of the plunger pump, precise control of the flow required by the system can be achieved, thereby achieving efficient operation of the equipment, enhanced adaptability to working conditions, avoiding pressure overload and energy waste, and ensuring the safety of the equipment.

[0018] like Figure 1 As shown, the present application provides a plunger pump displacement control method based on electronically controlled proportion, the method is applied to a plunger pump displacement control system based on electronically controlled proportion, the method comprising:

[0019] Step S100: Perform surface wear detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger slides in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinder bodies and the multiple plunger slides cooperate one by one to form multiple groups of plunger pairs.

[0020] The plunger pump is mainly composed of a plunger, a cylinder, an inlet and outlet valves, a transmission mechanism and other auxiliary components. Among them, the cylinder is the main part of the plunger pump, which is composed of a shell with sealing performance; the plunger is the core component of the plunger pump, which realizes the suction and discharge of liquid through reciprocating motion in the cylinder. The plunger slipper is a component installed in the plunger head. Its main function is to reduce the wear rate between the plunger and the swash plate, thereby extending the service life of the plunger. The swash plate is an inclined plate-shaped component in the plunger pump. It is connected to the plunger of the pump. The swash plate and the cylinder form an inclination angle. This angle determines the reciprocating stroke of the plunger and thus determines the displacement of the pump. During the working process of the pump, when the hydraulic fluid enters the swash plate, the inclination angle of the swash plate converts the hydraulic pressure into the driving force of the plunger, pushing the plunger to move; when the hydraulic fluid flows out of the swash plate, the function of the swash plate is to convert the hydraulic pressure into flow rate and fluid direction. As the plunger slide moves in the cylinder body to complete the suction and discharge action, the friction generated by the movement may cause wear of the cylinder body and multiple plunger slides, which in turn leads to errors in the displacement of each plunger pair (i.e. a pair of cylinder body and plunger slide), causing the equipment's working state to deviate or malfunction. Therefore, when controlling the displacement, the root cause (i.e. the wear condition) must be analyzed first.

[0021] Specifically, a visual inspection device is used to photograph the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger slides to obtain clear images, and the images are analyzed by image processing software. Based on the image processing results, the wear characteristics of the cylinder body and the plunger slide are extracted, and multiple visual cylinder body wear distributions and multiple visual plunger wear distributions are obtained. These distribution data may include detailed information such as the location, area, and depth of the wear, which can be specifically characterized by the coordinate points and amount of wear. At the same time, considering that the multiple cylinder bodies and the multiple plunger slides are multiple groups of plunger pairs formed by one-to-one matching, it is necessary to analyze the wear of each group of plunger pairs and compare the wear data of the cylinder body and the plunger slide of each group of plunger pairs, so as to understand the matching status and wear trend between them.

[0022] By performing surface wear detection on multiple groups of plunger pairs, the accuracy and efficiency of wear detection can be improved, providing an analytical decision-making basis for subsequent displacement control of the plunger pump.

[0023] Step S200: Based on the laser scanning equipment, laser scanning detection is performed on the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, and the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions are fused to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions.

[0024] Optionally, a laser scanning device suitable for surface detection of the cylinder body and plunger shoe is selected. According to the material, size and surface characteristics of the cylinder body and plunger shoe, the parameters of the laser scanning device, such as scanning speed, resolution, laser power, etc., are set. After aligning the scanning position, the device is started to scan. The device will emit a laser beam and receive the reflected signal. The three-dimensional shape and wear condition of the surface are calculated to ensure that all tiny wear marks are captured. The device records and analyzes the information data such as the three-dimensional shape, wear position, area and depth of the scanned cylinder body and plunger shoe, so as to extract the laser cylinder body wear distribution and laser plunger wear distribution. Next, the laser cylinder body wear distribution and laser plunger wear distribution obtained by laser scanning are fused with the visual cylinder body wear distribution and visual plunger wear distribution obtained by visual inspection. The fusion method can be achieved by weighted average, maximum likelihood estimation, Kalman filtering and other methods. The specific method is selected according to the characteristics and needs of the data. After data fusion processing, multiple fused cylinder body wear distributions and multiple fused plunger wear distributions are obtained. These fused wear distributions comprehensively consider the results of laser scanning and visual inspection, and provide more comprehensive and accurate wear information.

[0025] By integrating the laser scanning detection and visual inspection results of multiple cylinder body inner surfaces and multiple plunger shoe outer surfaces, more accurate and comprehensive wear distribution data can be obtained, providing strong support for subsequent equipment control and maintenance management.

[0026] Step S300: Acquire the metal wear monitoring record data of the plunger pump during use, correct the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions.

[0027] For example, since wear can cause metal particles to fall into the oil in which the pump is running, based on the monitoring data of metal particles in the oil, it is possible to determine whether the obtained wear distribution is accurate and make corrections. Specifically, a special online monitoring system is used to collect metal wear data of the plunger pump in real time or regularly during use, including the number and size of metal particles, as well as other parameters related to wear, such as temperature, pressure, vibration, etc. The collected metal wear data is preprocessed, including data cleaning, screening, conversion, etc., to ensure the accuracy and consistency of the data. Finally, according to the working principle and actual situation of the plunger pump, the data is analyzed and interpreted to understand the type, source and quantity changes of metal particles, and to extract key information related to the wear of the cylinder body and plunger slipper. Next, a corresponding correction strategy is formulated based on the metal wear monitoring record data and the working principle of the plunger pump, which includes the calculation of the wear rate based on the monitoring data, the update of the wear distribution model, etc. The metal wear monitoring record data is compared and analyzed with the fusion cylinder wear distribution and the fusion plunger wear distribution, and the fusion wear distribution is corrected and adjusted according to the correction strategy to reflect the actual wear situation. The above correction process requires multiple iterations and verifications to ensure that the corrected wear distribution is more accurate and reliable.

[0028] By acquiring the metal wear monitoring record data during the use of the plunger pump and correcting the wear distribution of multiple fused cylinders and multiple fused plungers, more accurate and reliable wear distribution data can be obtained, further ensuring the accuracy and reliability of subsequent optimization analysis.

[0029] Step S400: obtaining the electronic control instruction for the current displacement control, and analyzing and obtaining the control deviation of the displacement control by the electronic control instruction according to the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio.

[0030] Furthermore, the current electronic control instructions are read from the electronic control system of the plunger pump, including the basic swash plate angle and the ideal electronic control displacement ratio. These instructions represent the desired displacement setting and operating status. Because the swash plate angle will change the stroke of the plunger shoe in the cylinder and thus change the displacement, the displacement error caused by wear will cause the displacement directly achieved by the current instruction to have an error. Therefore, it is necessary to analyze the control deviation, and then decide the optimization step size of the swash plate angle optimization according to the size of the control deviation, and then optimize it.

[0031] Specifically, since wear can cause the clearance of pump internal components to change, thus affecting the accuracy and stability of displacement control, the actual impact of these wears on displacement control is evaluated based on multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions. The actual displacement is calculated based on the current electronic control command and wear distribution data, and the actual displacement is compared with the ideal electronic control displacement ratio to calculate the control deviation. The control deviation reflects the difference between the electronic control command and the actual displacement, and is a key indicator for evaluating the accuracy of displacement control. It helps to more accurately evaluate the performance of displacement control and provide a basis for subsequent maintenance and optimization.

[0032] Step S500: Based on the amplitude of the control deviation, a decision is made to obtain the optimization amplitude for optimizing the electronic control command, the basic swash plate angle is optimized, the optimized electronic control command is obtained, and displacement control is performed, wherein the optimization is performed with the purpose of making the actual electronic control displacement ratio of the actual displacement control close to the ideal electronic control displacement ratio.

[0033] Specifically, the control deviation between the calculated electronic control command and the actual displacement is obtained, and a reasonable optimization amplitude strategy is formulated according to the amplitude of the control deviation. The amplitude of the control deviation refers to the difference between the actual electronic control displacement ratio of the actual displacement control and the ideal electronic control displacement ratio. Assuming that the actual electronic control displacement ratio is A and the ideal electronic control displacement ratio is B, the amplitude of the control deviation can be expressed as |AB|; the larger this value is, the greater the difference between the actual displacement control and the ideal displacement control, that is, the greater the amplitude of the control deviation. The formulated optimization amplitude strategy can be implemented based on historical data, expert experience or mathematical models to ensure the effectiveness and stability of the optimization. Generally, the optimization amplitude should be gradually increased to avoid unnecessary impact on the system caused by excessive adjustments.

[0034] Furthermore, according to the optimization amplitude strategy, the optimization amplitude of the basic swash plate angle in the electronic control command is determined. This optimization amplitude can reduce the control deviation and make the actual electronic control displacement ratio closer to the ideal electronic control displacement ratio. Specifically, the basic swash plate angle in the electronic control command is adjusted according to the determined optimization amplitude, and the adjusted basic swash plate angle and other related parameters are integrated into the electronic control command to generate an optimized electronic control command. Finally, the optimized electronic control command is sent to the electronic control system of the plunger pump to execute the new displacement control to complete the control optimization of the plunger pump displacement. In addition, it should be noted that with the passage of time and the use of the plunger pump, the wear condition may change. Therefore, the electronic control command needs to be optimized regularly or irregularly to maintain the optimal performance of the displacement control.

[0035] Furthermore, surface wear detection is performed on multiple cylinder inner surfaces and multiple plunger outer surfaces in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions. Step S100 of the present application also includes:

[0036] Step S110: Capturing images of the inner surfaces of multiple cylinders and the outer surfaces of multiple plunger shoes in the plunger pump to obtain multiple cylinder images and multiple plunger images.

[0037] Step S120: Based on the visual detection data of the piston pump wear, a sample cylinder image set and a sample visual cylinder wear information set are collected, and a cylinder wear visual recognition branch is trained; a sample plunger image set and a sample visual plunger wear information set are collected, and a plunger wear visual recognition branch is trained, wherein the sample visual cylinder wear information includes multiple cylinder wear parameters and multiple wear position parameters.

[0038] Step S130: Connect the cylinder wear visual recognition branch and the plunger wear visual recognition branch to obtain a plunger pump wear visual identifier.

[0039] Step S140: Based on the plunger pump wear visual identifier, the multiple cylinder images and multiple plunger images are identified to obtain multiple visual cylinder wear information and multiple visual plunger wear information, and multiple visual cylinder wear distributions and multiple visual plunger wear distributions are constructed to obtain.

[0040] Optionally, a visual inspection system is used to collect images of the inner surfaces of multiple cylinders in the plunger pump to ensure that the key areas of each cylinder are captured and multiple cylinder images are obtained. Similarly, a visual inspection system is used to collect images of the outer surfaces of multiple plunger slides of the plunger pump to ensure that the wear area of ​​each plunger is recorded in detail and multiple plunger images are obtained. Next, sample cylinder images representing different degrees of wear are selected from the existing visual inspection data of plunger pump wear to form a sample cylinder image set. For each sample cylinder image, according to professional evaluation or measurement, the corresponding cylinder wear parameters (such as wear depth, wear area, etc.) and wear position parameters (such as the specific location where the wear occurs) are recorded to form a sample visual cylinder wear information set. Then, deep learning or traditional image processing methods are used to train the cylinder wear visual recognition branch with the sample cylinder image set and the sample visual cylinder wear information set as input. Similarly, sample plunger images representing different degrees of wear are selected from the existing visual inspection data of plunger pump wear to form a sample plunger image set. For each sample plunger image, the corresponding plunger wear parameters (such as wear depth, wear shape, etc.) and wear position parameters are recorded to form a sample visual plunger wear information set, and the same method is used to train the plunger wear visual recognition branch. Finally, the trained cylinder wear visual recognition branch and plunger wear visual recognition branch are connected to form a complete plunger pump wear visual identifier, which can process the images of the cylinder and plunger at the same time and output the corresponding wear information. Among them, the above-mentioned sample visual cylinder wear information includes multiple cylinder wear parameters and multiple wear position parameters.

[0041] Use the trained piston pump wear visual identifier to identify the multiple cylinder images and multiple plunger images collected previously. Extract the visual wear information of each cylinder and plunger from the recognition results, including wear parameters and wear position parameters. Based on the extracted wear information, construct multiple visual cylinder wear distributions and multiple visual plunger wear distributions. These distributions can intuitively display the wear conditions of the cylinder and plunger, providing important reference for subsequent optimization analysis and maintenance.

[0042] Further, based on the laser scanning equipment, laser scanning detection is performed on the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions. Step S200 of the present application also includes:

[0043] Step S210: performing laser scanning detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger shoes in the plunger pump to obtain multiple cylinder point cloud data and multiple plunger point cloud data.

[0044] Step S220: Based on the wear laser detection data of the plunger pump, collect a sample cylinder point cloud data set and a sample plunger point cloud data set, and identify the wear parameters and wear positions of the inner surface of the cylinder and the outer surface of the plunger to obtain a sample laser cylinder wear information set and a sample laser plunger wear information set.

[0045] Step S230: Using the sample cylinder point cloud data set and the sample laser cylinder wear information set, training the cylinder wear laser recognition branch, using the sample plunger point cloud data set and the sample laser plunger wear information set, training the plunger wear laser recognition branch, and obtaining a plunger pump wear laser identifier.

[0046] Step S240: using the plunger pump wear laser identifier to identify the multiple cylinder point cloud data and the multiple plunger point cloud data, and obtaining multiple laser cylinder wear distributions and multiple laser plunger wear distributions.

[0047] Exemplarily, a high-precision laser scanner is used to perform laser scanning detection on multiple cylinder body surfaces and multiple plunger shoe outer surfaces in the plunger pump. Through laser scanning, three-dimensional point cloud data of the cylinder body and plunger surface can be obtained, and these data will be used for subsequent wear identification and analysis. Representative sample cylinder body point cloud data sets and sample plunger point cloud data sets are screened out from the laser detection data of the plunger pump, and the sample cylinder body point cloud data and sample plunger point cloud data are analyzed in detail, and the wear parameters (such as wear depth, wear area, etc.) and wear locations (such as the specific coordinate point location where the wear occurs) are marked, and the data with identification information is organized into a sample laser cylinder body wear information set and a sample laser plunger wear information set.

[0048] Next, using deep learning or machine learning methods, with the sample cylinder point cloud data set and the sample laser cylinder wear information set as input, the cylinder wear laser recognition branch is trained. This branch can learn the mapping relationship between the cylinder point cloud data and the wear information, thereby realizing the wear recognition of the new cylinder point cloud data. Similarly, using the sample plunger point cloud data set and the sample laser plunger wear information set, the plunger wear laser recognition branch is trained. This branch will learn the mapping relationship between the plunger point cloud data and the wear information, and is used to identify the wear condition of the new plunger point cloud data. The trained cylinder wear laser recognition branch and the plunger wear laser recognition branch are integrated to construct a plunger pump wear laser identifier, which can simultaneously process the point cloud data of the cylinder and the plunger and output the corresponding wear information.

[0049] The constructed plunger pump wear laser identifier is used to identify the previously collected multiple cylinder point cloud data and multiple plunger point cloud data, and the laser wear information of each cylinder and plunger is extracted from the identification results, including wear parameters and wear positions. Finally, based on the extracted wear information, visualization technology (such as three-dimensional model, color mapping, etc.) is used to construct multiple laser cylinder wear distributions and multiple laser plunger wear distributions. These distribution maps can intuitively display the wear of the cylinder and plunger, so as to quickly locate the severely worn areas, providing important references for subsequent analysis and maintenance.

[0050] Furthermore, the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions are fused to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions. Step S200 of the present application further includes:

[0051] Step S250: constructing multiple cylinder coordinate systems and multiple plunger coordinate systems of the multiple cylinder inner surfaces and multiple plunger shoe outer surfaces.

[0052] Step S260: Map the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions, the multiple laser cylinder wear distributions and the multiple laser plunger wear distributions in the multiple cylinder coordinate systems and the multiple plunger coordinate systems, index the visual wear parameters and the laser wear parameters of each coordinate point for calculation and fusion, and obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions.

[0053] Furthermore, in order to more accurately describe and evaluate the wear of the plunger pump, multiple coordinate systems of the inner surfaces of the cylinder bodies and the outer surfaces of the plunger skids can be constructed, and the wear distribution data obtained by different detection methods (such as vision and laser) can be mapped to these coordinate systems, and then parameter fusion can be performed. Specifically, for each inner surface of the cylinder body, an independent cylinder coordinate system is constructed according to its geometric shape and size, and the coordinate system should be able to accurately describe each position of the inner surface of the cylinder body. Similarly, for each outer surface of the plunger skid, an independent plunger coordinate system is constructed according to its shape and size, and the coordinate system should be able to cover all areas of the outer surface of the plunger. The visual wear distribution data of the multiple cylinder bodies and plungers that have been obtained are mapped to the corresponding cylinder coordinate system and plunger coordinate system. At the same time, the laser wear distribution data of the multiple cylinder bodies and plungers obtained by laser detection are mapped to the corresponding cylinder coordinate system and plunger coordinate system, and it is ensured that each coordinate point corresponds to the corresponding cylinder or plunger position. In addition, the visual wear distribution data and the laser wear distribution data need to be calibrated and aligned in the cylinder coordinate system and the plunger coordinate system to ensure that the data obtained under different detection methods have consistent spatial correspondence.

[0054] Next, for each coordinate point, the corresponding visual wear parameters (such as wear depth, wear area, etc.) and laser wear parameters are extracted, and the visual wear parameters and laser wear parameters are fused according to a certain fusion algorithm (such as weighted average, maximum value selection, etc.). During the fusion, the advantages of the two detection methods can be comprehensively considered to improve the accuracy and reliability of wear assessment. The fused wear parameters are remapped to the cylinder coordinate system and the plunger coordinate system to generate multiple fused cylinder wear distributions and multiple fused plunger wear distributions. These distribution maps will comprehensively reflect the results of visual and laser detection, meeting the subsequent analysis accuracy requirements.

[0055] Further, the metal wear monitoring record data of the plunger pump during use is obtained, the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions are corrected to obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions, and step S300 of the present application also includes:

[0056] Step S310: Acquire metal wear particle detection data in the oil during use of the plunger pump to obtain the actual total wear amount.

[0057] Step S320: extracting and obtaining the identified total wear amount according to the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and calculating and obtaining the identified wear amount error in combination with the actual total wear amount.

[0058] Step S330: According to the identified wear amount error, uniformly correct the wear parameters in the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions to obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions.

[0059] Specifically, the metal wear particles in the oil of the plunger pump during use are detected by oil analysis technology (such as spectral analysis, iron spectrum analysis, etc.), the number of metal particles of different sizes and types in the oil is measured, and the actual total wear amount is obtained, so as to infer the actual wear degree. Based on the generated multiple fused cylinder wear distributions and multiple fused plunger wear distributions, the wear parameters of each cylinder and plunger, such as wear area, wear depth, etc., are extracted, and the total identification wear amount is calculated. The actual total wear amount is compared with the identification total wear amount, and the identification wear amount error is calculated. This error reflects the deviation of the current identification system in evaluating the wear degree. Then, according to the identification wear amount error, a uniform correction strategy is adopted to correct the wear parameters in the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, that is, the system will not correct each wear point separately, but will make a uniform adjustment to the entire distribution. Finally, the correction of the entire wear distribution is achieved by multiplying the wear parameters (such as wear area, wear depth) of each wear point by a correction coefficient (the coefficient is calculated based on the identification wear amount error). The corrected wear parameters are applied to regenerate a plurality of corrected cylinder wear distributions and a plurality of corrected plunger wear distributions, which will more accurately reflect the actual wear conditions of the plunger pump.

[0060] Further, the electronic control instruction for the current displacement control is obtained, and the control deviation of the displacement control by the electronic control instruction is analyzed and obtained according to the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions. Step S400 of the present application also includes:

[0061] Step S410: obtaining the electronic control instruction for the current displacement control, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio.

[0062] Step S420: According to the basic swash plate angle, the sliding strokes of multiple plunger shoes in multiple cylinder bodies are obtained, and the multiple corrected cylinder body wear distributions and multiple corrected plunger wear distributions are indexed according to the sliding strokes to obtain multiple stroke total wear parameters.

[0063] Step S430: Calculate and obtain the control deviation of the displacement control according to the ideal electronically controlled displacement ratio according to the plurality of stroke total wear parameters.

[0064] Then, the control deviation is calculated based on the corrected wear parameters and the current electronic control instructions. Specifically, the electronic control instruction for the current displacement control is obtained, which includes the basic swash plate angle and the ideal electronic control displacement ratio. The basic swash plate angle determines the initial position of the plunger in the cylinder body, and the ideal electronic control displacement ratio represents the ratio of the desired displacement to the maximum displacement. According to the basic swash plate angle, the sliding stroke of multiple plunger shoes in multiple cylinder bodies can be calculated, and the stroke is specifically determined by the geometric relationship between the swash plate angle and the plunger stroke. Using the calculated sliding stroke as an index, search in multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions, and obtain the corresponding wear parameters from the corrected wear distribution at the corresponding stroke position. The wear parameters of each plunger on its respective sliding stroke are accumulated to obtain multiple total stroke wear parameters, which represent the displacement error caused by wear at different stroke positions.

[0065] Next, a displacement error model can be established based on the total stroke wear parameters obtained. This model can describe the displacement loss caused by wear under different electronic control instructions. Based on the displacement loss model and the ideal electronic control displacement ratio in the electronic control instruction, the actual displacement of the plunger pump under the current wear state can be calculated. Then the actual displacement is compared with the ideal displacement in the electronic control instruction to calculate the control deviation, which reflects the difference between the displacement control and the expected target under the current wear state. According to the calculated control deviation, the displacement control system can be adjusted accordingly to reduce the deviation and improve the accuracy of the displacement control. At the same time, the current wear condition and control deviation can be fed back to the maintenance personnel so that they can understand the operating status of the plunger pump in a timely manner and perform necessary maintenance and care.

[0066] Furthermore, according to the magnitude of the control deviation, a decision is made to obtain an optimization magnitude for optimizing the electronic control command, and the electronic control command is optimized. Step S500 of the present application further includes:

[0067] Step S510: According to the control deviation, decision mapping is performed to obtain an optimization amplitude for optimizing the basic swash plate angle, wherein the sample control deviation is collected, and the sample optimization amplitude is obtained by evaluation, and an optimization amplitude mapping table is constructed for decision mapping, and the size of the control deviation is positively correlated with the size of the optimization amplitude.

[0068] Step S520: With the purpose of making the actual electronically controlled displacement ratio of the actual displacement control close to the ideal electronically controlled displacement ratio, a displacement optimization function is constructed, as shown in the following formula:

[0069]

[0070] Among them, DOF is displacement fitness, K lis the ideal electronically controlled displacement ratio, K r is the theoretical electronically controlled displacement ratio under the optimized swash plate angle, K w The error electronically controlled displacement ratio formed by the actual arrangement error of the arrangement control under the optimized swash plate angle.

[0071] Step S530: According to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude to obtain an optimal swash plate angle and generate an optimized electronic control instruction.

[0072] Exemplarily, under different working conditions, the plunger pump is operated and the basic swash plate angle in the electronic control command is recorded, and the control deviation between the actual displacement and the ideal displacement is measured and recorded. For each control deviation, its appropriate optimization amplitude for the basic swash plate angle is evaluated. The collected sample control deviations and optimization amplitudes are sorted into the form of data pairs, and an optimization amplitude mapping table is constructed based on these data pairs. This table takes the control deviation as input and the optimization amplitude as output. In addition, in order to fully reflect the mapping situation, an interpolation or fitting method can be used to enable the mapping table to handle continuous control deviation values. In the actual detection process, when a new control deviation is detected in real time, the optimization amplitude mapping table is searched or the interpolation or fitting method is used to find the optimization amplitude corresponding to the control deviation to make an optimization amplitude decision.

[0073] At the same time, when constructing the optimization amplitude mapping table, it should be ensured that the size of the control deviation is positively correlated with the size of the optimization amplitude, that is, as the control deviation increases, the optimization amplitude should also increase accordingly to more effectively reduce the deviation. In practical applications, it is necessary to ensure its accuracy by regularly checking and updating the mapping table. If it is found that the relationship in the mapping table no longer satisfies the positive correlation, it may be necessary to re-collect sample data and update the mapping table. Finally, the optimization amplitude obtained by the decision mapping is applied to the adjustment of the basic swash plate angle. For example, if the control deviation is positive (the actual displacement is less than the ideal displacement), the basic swash plate angle is increased to increase the displacement; conversely, if the control deviation is negative (the actual displacement is greater than the ideal displacement), the basic swash plate angle is reduced to reduce the displacement.

[0074] Furthermore, in order to make the actual displacement ratio as close as possible to the ideal displacement ratio, thereby minimizing the control deviation, finding the optimal swash plate angle, and constructing a displacement optimization function, specifically: Among them, DOF is displacement fitness, K l is the ideal electronically controlled displacement ratio, K r is the theoretical electronically controlled displacement ratio under the optimized swash plate angle, K wThe error electronically controlled displacement ratio formed by the actual arrangement error of the arrangement control under the optimized swash plate angle. Then, according to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude to obtain the optimal swash plate angle, and the optimized electronic control command is generated to optimize the displacement control of the plunger pump.

[0075] Furthermore, according to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude. Step S530 of the present application further includes:

[0076] Step S531: using the optimization amplitude to adjust the basic swash plate angle to obtain a first swash plate angle.

[0077] Step S532: obtaining a first sliding stroke of a plurality of plunger shoes in a plurality of cylinder bodies at the first swash plate angle, and obtaining a first theoretical electronically controlled displacement ratio at the first swash plate angle.

[0078] Step S533: Index the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions according to the first sliding stroke, obtain multiple first stroke total wear parameters, calculate the first error electronic control displacement ratio, and calculate the first displacement fitness based on the displacement optimization function.

[0079] Step S534: Continue the optimization until convergence, output the swash plate angle with the maximum displacement adaptability as the optimal swash plate angle, and generate an optimized electronic control command.

[0080] Specifically, the current basic swash plate angle is obtained from the electronic control instruction, and the basic swash plate angle is adjusted according to the previously determined optimization amplitude to obtain the first swash plate angle. The first sliding strokes of multiple plunger shoes in multiple cylinder bodies are calculated based on the first swash plate angle, and the first theoretical electronic control displacement ratio is calculated according to the first swash plate angle and the design parameters of the plunger pump. Next, the first sliding stroke is used to index in multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions, and multiple first stroke total wear parameters are calculated according to the index results. The displacement loss caused by wear is calculated by the first stroke total wear parameter, and then the first error electronic control displacement ratio is calculated. The first error electronic control displacement ratio is substituted into the displacement optimization function to calculate the first displacement fitness. Check whether the convergence condition is met (such as the displacement fitness is lower than a certain threshold, the optimization amplitude is less than a certain preset value or the maximum number of iterations is reached), and if the convergence condition is not met, continue to optimize. According to the current swash plate angle, the error electronic control displacement ratio and the displacement optimization function, a new optimization amplitude is calculated, and the swash plate angle is adjusted by the amplitude to obtain a new swash plate angle. The optimization process is repeated until the preset convergence condition is met. When the optimization process converges, the swash plate angle with the maximum displacement fitness is output as the optimal swash plate angle. Finally, the optimized electronic control command is generated based on the optimal swash plate angle and other necessary control parameters.

[0081] Through the technical solutions of the above-mentioned embodiments, the method for controlling the displacement of a piston pump based on an electronically controlled ratio provided in the present application solves the technical problems that the control precision is low, the control effect is poor, the system stability and reliability are affected, and there is a lack of intelligent control to respond to complex working conditions due to the limited adjustment range during the control of the piston pump. The method achieves the technical effect of adaptively responding to complex working conditions, accurately controlling the displacement of the piston pump based on the wear analysis of the piston pump, improving the performance and reliability of the equipment, and ensuring that the equipment can operate accurately and stably.

[0082] Embodiment 2

[0083] Based on the same inventive concept as the plunger pump displacement control method based on the electronically controlled ratio in the aforementioned embodiment, Figure 2 As shown, the present application provides a plunger pump displacement control system based on electronically controlled proportion, the system comprising:

[0084] The wear detection module 11 is used to perform surface wear detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger slides in the plunger pump, and obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinder bodies and multiple plunger slides cooperate one by one to form multiple groups of plunger pairs.

[0085] The laser scanning module 12 is used to perform laser scanning detection on the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes based on a laser scanning device, obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, fuse the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions, and obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions.

[0086] The wear correction module 13 is used to obtain the metal wear monitoring record data of the plunger pump during use, correct the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions.

[0087] The deviation analysis module 14 is used to obtain the electronic control instruction for the current displacement control, and analyze and obtain the control deviation of the displacement control performed by the electronic control instruction based on the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio.

[0088] The optimization decision module 15 is used to decide on the optimization amplitude of optimizing the electronic control command according to the amplitude of the control deviation, optimize the basic swash plate angle, obtain the optimized electronic control command, and perform displacement control, wherein the optimization is performed with the purpose of making the actual electronic control displacement ratio of the actual displacement control close to the ideal electronic control displacement ratio.

[0089] Furthermore, the wear detection module 11 is further configured to perform the following steps:

[0090] Images are collected from the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger shoes in the plunger pump to obtain multiple cylinder images and multiple plunger images.

[0091] According to the visual detection data of piston pump wear, a sample cylinder image set and a sample visual cylinder wear information set are collected, and a cylinder wear visual recognition branch is trained. A sample plunger image set and a sample visual plunger wear information set are collected, and a plunger wear visual recognition branch is trained, wherein the sample visual cylinder wear information includes multiple cylinder wear parameters and multiple wear position parameters.

[0092] The cylinder wear visual identification branch and the plunger wear visual identification branch are connected to obtain a plunger pump wear visual identifier.

[0093] Based on the plunger pump wear visual identifier, the multiple cylinder images and multiple plunger images are identified to obtain multiple visual cylinder wear information and multiple visual plunger wear information, and multiple visual cylinder wear distributions and multiple visual plunger wear distributions are constructed to obtain.

[0094] Furthermore, the laser scanning module 12 is also used to perform the following steps:

[0095] Laser scanning detection is performed on multiple cylinder body inner surfaces and multiple plunger shoe outer surfaces in the plunger pump to obtain multiple cylinder body point cloud data and multiple plunger point cloud data.

[0096] According to the wear laser detection data of the plunger pump, a sample cylinder point cloud data set and a sample plunger point cloud data set are collected, and the wear parameters and wear positions of the inner surface of the cylinder and the outer surface of the plunger are marked to obtain a sample laser cylinder wear information set and a sample laser plunger wear information set.

[0097] The sample cylinder point cloud data set and the sample laser cylinder wear information set are used to train the cylinder wear laser identification branch, and the sample plunger point cloud data set and the sample laser plunger wear information set are used to train the plunger wear laser identification branch to obtain a plunger pump wear laser identifier.

[0098] The plunger pump wear laser identifier is used to identify the multiple cylinder point cloud data and the multiple plunger point cloud data to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions.

[0099] Furthermore, the laser scanning module 12 is also used to perform the following steps:

[0100] A plurality of cylinder coordinate systems and a plurality of plunger coordinate systems are constructed for the plurality of cylinder inner surfaces and the plurality of plunger shoe outer surfaces.

[0101] The multiple visual cylinder wear distributions and the multiple visual plunger wear distributions, the multiple laser cylinder wear distributions and the multiple laser plunger wear distributions are mapped in the multiple cylinder coordinate systems and the multiple plunger coordinate systems, and the visual wear parameters and the laser wear parameters of each coordinate point are indexed for calculation and fusion to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions.

[0102] Furthermore, the wear correction module 13 is further configured to perform the following steps:

[0103] The metal wear particle detection data in the oil of the plunger pump during use is obtained to obtain the actual total wear amount.

[0104] According to the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, the identified total wear amount is extracted and obtained, and combined with the actual total wear amount, the identified wear amount error is calculated and obtained.

[0105] According to the identified wear amount error, the wear parameters in the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions are uniformly corrected to obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions.

[0106] Furthermore, the deviation analysis module 14 is further configured to perform the following steps:

[0107] The electronic control instruction for the current displacement control is obtained, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio.

[0108] According to the basic swash plate angle, the sliding strokes of multiple plunger shoes in multiple cylinder bodies are obtained, and according to the sliding strokes, the multiple corrected cylinder body wear distributions and multiple corrected plunger wear distributions are indexed to obtain multiple stroke total wear parameters.

[0109] A control deviation for performing displacement control according to the ideal electronically controlled displacement ratio is calculated based on the plurality of stroke total wear amount parameters.

[0110] Furthermore, the optimization decision module 15 is also used to perform the following steps:

[0111] According to the control deviation, the decision mapping obtains the optimization amplitude for optimizing the basic swash plate angle, wherein the sample control deviation is collected, and the sample optimization amplitude is obtained by evaluation, and an optimization amplitude mapping table is constructed for decision mapping, and the size of the control deviation is positively correlated with the size of the optimization amplitude.

[0112] With the purpose of making the actual electronically controlled displacement ratio of the actual displacement control close to the ideal electronically controlled displacement ratio, a displacement optimization function is constructed as follows:

[0113]

[0114] Among them, DOF is displacement fitness, K l is the ideal electronically controlled displacement ratio, K r is the theoretical electronically controlled displacement ratio under the optimized swash plate angle, K w The error electronically controlled displacement ratio formed by the actual arrangement error of the arrangement control under the optimized swash plate angle.

[0115] According to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude to obtain an optimal swash plate angle and generate an optimized electronic control instruction.

[0116] Furthermore, the optimization decision module 15 is also used to perform the following steps:

[0117] The basic swash plate angle is adjusted using the optimization amplitude to obtain a first swash plate angle.

[0118] A first sliding stroke of a plurality of plunger shoes in a plurality of cylinder bodies at the first swash plate angle is obtained, and a first theoretical electronically controlled displacement ratio at the first swash plate angle is obtained.

[0119] According to the first sliding stroke, the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions are indexed to obtain multiple first stroke total wear parameters, and the first error electronic control displacement ratio is calculated, and based on the displacement optimization function, the first displacement fitness is calculated.

[0120] Continue to optimize until convergence, output the swash plate angle with the maximum displacement adaptability as the optimal swash plate angle, and generate optimized electronic control instructions.

[0121] Through the above-mentioned detailed description of the plunger pump displacement control method based on electronic control proportion in this specification, those skilled in the art can clearly know the plunger pump displacement control system based on electronic control proportion in this embodiment. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0122] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Plunger pump displacement control method based on electronic control ratio, It is characterized in that The method comprises: Performing surface wear detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger slides in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinder bodies and the multiple plunger slides cooperate one by one to form multiple groups of plunger pairs; Based on the laser scanning equipment, laser scanning detection is performed on the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, and the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions are fused to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions; Acquire the metal wear monitoring record data of the plunger pump during use, correct the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions; Acquire the electronic control instruction for the current displacement control, and analyze and acquire the control deviation of the displacement control by the electronic control instruction according to the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; According to the amplitude of the control deviation, a decision is made to obtain the optimization amplitude for optimizing the electronic control command, the basic swash plate angle is optimized, the optimized electronic control command is obtained, and displacement control is performed, wherein the optimization is performed with the purpose of making the actual electronic control displacement ratio of the actual displacement control close to the ideal electronic control displacement ratio.

2. The method for controlling the displacement of a piston pump based on electronic control ratio according to claim 1, It is characterized in that Perform surface wear detection on multiple cylinder inner surfaces and multiple plunger outer surfaces in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, including: Capturing images of multiple cylinder inner surfaces and multiple plunger outer surfaces in the plunger pump to obtain multiple cylinder images and multiple plunger images; According to the wear visual detection data of the plunger pump, a sample cylinder image set and a sample visual cylinder wear information set are collected, and a cylinder wear visual recognition branch is trained; a sample plunger image set and a sample visual plunger wear information set are collected, and a plunger wear visual recognition branch is trained, wherein the sample visual cylinder wear information includes multiple cylinder wear parameters and multiple wear position parameters; Connect the cylinder wear visual identification branch and the plunger wear visual identification branch to obtain a plunger pump wear visual identifier; Based on the plunger pump wear visual identifier, the multiple cylinder images and multiple plunger images are identified to obtain multiple visual cylinder wear information and multiple visual plunger wear information, and multiple visual cylinder wear distributions and multiple visual plunger wear distributions are constructed to obtain.

3. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 1, It is characterized in that Based on laser scanning, the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes are laser scanned and detected to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions, including: Perform laser scanning detection on multiple cylinder inner surfaces and multiple plunger outer surfaces in the plunger pump to obtain multiple cylinder point cloud data and multiple plunger point cloud data; According to the wear laser detection data of the plunger pump, a sample cylinder point cloud data set and a sample plunger point cloud data set are collected, and the wear parameters and wear positions of the inner surface of the cylinder and the outer surface of the plunger are marked to obtain a sample laser cylinder wear information set and a sample laser plunger wear information set; The sample cylinder point cloud data set and the sample laser cylinder wear information set are used to train the cylinder wear laser recognition branch, and the sample plunger point cloud data set and the sample laser plunger wear information set are used to train the plunger wear laser recognition branch to obtain a plunger pump wear laser identifier; The plunger pump wear laser identifier is used to identify the multiple cylinder point cloud data and the multiple plunger point cloud data to obtain multiple laser cylinder wear distributions and multiple laser plunger wear distributions.

4. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 1, It is characterized in that Combining the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions for fusion, to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions, including: Constructing multiple cylinder coordinate systems and multiple plunger coordinate systems of the multiple cylinder inner surfaces and multiple plunger sliding shoe outer surfaces; The multiple visual cylinder wear distributions and the multiple visual plunger wear distributions, the multiple laser cylinder wear distributions and the multiple laser plunger wear distributions are mapped in the multiple cylinder coordinate systems and the multiple plunger coordinate systems, and the visual wear parameters and the laser wear parameters of each coordinate point are indexed for calculation and fusion to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions.

5. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 1, It is characterized in that Acquiring metal wear monitoring record data of the plunger pump during use, correcting the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and obtaining multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions, including: Acquire metal wear particle detection data in the oil of the plunger pump during use to obtain the actual total wear amount; Extracting and obtaining the total identified wear amount according to the plurality of fused cylinder wear distributions and the plurality of fused plunger wear distributions, and calculating and obtaining the identified wear amount error in combination with the actual total wear amount; According to the identified wear amount error, the wear parameters in the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions are uniformly corrected to obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions.

6. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 1, It is characterized in that Acquiring the electronic control instruction currently performing displacement control, and analyzing and acquiring the control deviation of the electronic control instruction for displacement control according to the multiple corrected cylinder wear distributions and the multiple corrected plunger wear distributions, including: Acquire an electronic control instruction for current displacement control, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; According to the basic swash plate angle, the sliding strokes of the plurality of plunger shoes in the plurality of cylinder bodies are obtained, and according to the sliding strokes, the plurality of corrected cylinder body wear distributions and the plurality of corrected plunger wear distributions are indexed to obtain a plurality of stroke total wear amount parameters; A control deviation for performing displacement control according to the ideal electronically controlled displacement ratio is calculated based on the plurality of stroke total wear amount parameters.

7. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 1, It is characterized in that According to the magnitude of the control deviation, a decision is made to obtain an optimization magnitude for optimizing the electronic control instruction, and the electronic control instruction is optimized, including: According to the control deviation, the decision mapping obtains the optimization amplitude for optimizing the basic swash plate angle, wherein the sample control deviation is collected, and the sample optimization amplitude is obtained by evaluation, and an optimization amplitude mapping table is constructed for decision mapping, and the size of the control deviation is positively correlated with the size of the optimization amplitude; With the purpose of making the actual electronically controlled displacement ratio of the actual displacement control close to the ideal electronically controlled displacement ratio, a displacement optimization function is constructed as follows: Among them, DOF is displacement fitness, K l is the ideal electronically controlled displacement ratio, K r is the theoretical electronically controlled displacement ratio under the optimized swash plate angle, K w The error electronically controlled displacement ratio formed by the actual arrangement error of the arrangement control under the optimized swash plate angle; According to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude to obtain an optimal swash plate angle and generate an optimized electronic control instruction.

8. The method for controlling the displacement of a piston pump based on electronically controlled proportion according to claim 7, It is characterized in that According to the displacement optimization function, the basic swash plate angle is optimized by using the optimization amplitude, including: Using the optimization amplitude, adjusting the basic swash plate angle to obtain a first swash plate angle; Acquire a first sliding stroke of a plurality of plunger shoes in a plurality of cylinder bodies at the first swash plate angle, and acquire a first theoretical electronically controlled displacement ratio at the first swash plate angle; Indexing the plurality of corrected cylinder wear distributions and the plurality of corrected plunger wear distributions according to the first sliding stroke, obtaining a plurality of first stroke total wear parameters, and calculating a first error electronically controlled displacement ratio, and calculating a first displacement fitness based on the displacement optimization function; Continue to optimize until convergence, output the swash plate angle with the maximum displacement adaptability as the optimal swash plate angle, and generate optimized electronic control instructions.

9. Based on electronically controlled proportional piston pump displacement control system, It is characterized in that For implementing the method according to any one of claims 1 to 8, the system comprises: A wear detection module is used to perform surface wear detection on the inner surfaces of multiple cylinder bodies and the outer surfaces of multiple plunger slides in the plunger pump to obtain multiple visual cylinder wear distributions and multiple visual plunger wear distributions, wherein the multiple cylinder bodies and the multiple plunger slides cooperate one by one to form multiple groups of plunger pairs; A laser scanning module, for performing laser scanning detection on the inner surfaces of the multiple cylinder bodies and the outer surfaces of the multiple plunger shoes based on a laser scanning device, obtaining multiple laser cylinder wear distributions and multiple laser plunger wear distributions, and fusing the multiple visual cylinder wear distributions and the multiple visual plunger wear distributions to obtain multiple fused cylinder wear distributions and multiple fused plunger wear distributions; A wear correction module is used to obtain the metal wear monitoring record data of the plunger pump during use, correct the multiple fused cylinder wear distributions and the multiple fused plunger wear distributions, and obtain multiple corrected cylinder wear distributions and multiple corrected plunger wear distributions; a deviation analysis module, used for obtaining an electronic control instruction currently performing displacement control, and analyzing and obtaining a control deviation of the electronic control instruction for performing displacement control according to the plurality of corrected cylinder wear distributions and the plurality of corrected plunger wear distributions, wherein the electronic control instruction includes a basic swash plate angle and an ideal electronic control displacement ratio; The optimization decision module is used to decide on the optimization amplitude of optimizing the electronic control command according to the amplitude of the control deviation, optimize the basic swash plate angle, obtain the optimized electronic control command, and perform displacement control, wherein the optimization is performed with the purpose of making the actual electronic control displacement ratio of the actual displacement control close to the ideal electronic control displacement ratio.

Images