A multi-meter water meter testing system and method

Abstract

The application discloses a multi-table water meter calibration system and method, the multi-table water meter calibration system is provided with a computer control subsystem, a water meter clamping subsystem, a flow regulation subsystem, an image acquisition subsystem and a standard measurement subsystem; the computer control subsystem can control other subsystems to complete water meter clamping, water passing and exhausting, flow detection, image acquisition, water quality acquisition, water volume calibration error acquisition, water volume calibration error comparison, calibration report generation and other operations. The application achieves the technical effects of realizing automatic calibration of multi-table water meters, being capable of performing calibration optimization and dynamic adjustment according to different water meter models and detection flow settings, and improving calibration accuracy and efficiency.

Description

Technical Field

[0001] This application relates to the technical field of instrument calibration, specifically to a multi-position water meter calibration system and method. Background Technology

[0002] As the core instrument for measuring water consumption, the calibration of water meters is of paramount importance. With economic development and social progress, the rational utilization and accurate measurement of water resources have become increasingly crucial. As the fundamental tool for water measurement, the accuracy of water meters directly affects the accurate calculation of water fees and the rational allocation of water resources. The national statutory metrology department has also formulated relevant regulations, imposing strict requirements on the calibration of water meters. Currently, all sectors rely on water resources. Whether it's industrial production, agricultural irrigation, or residential water use, accurate measurement through water meters is essential. Therefore, ensuring the accuracy of water meters is of great significance for protecting the interests of all parties and promoting sustainable development.

[0003] In existing technologies, water meter verification typically employs various methods. A common approach is to conduct verification through rigorous experimental procedures, following the relevant regulations of the national legal metrology department. Some methods utilize traditional measurement techniques to calibrate, test, and verify the metering performance of the water meter, ensuring that the readings are within a reasonable range. However, these verification methods often lack innovation and efficiency, making it difficult to achieve accurate and comprehensive verification when dealing with different types and specifications of water meters. Furthermore, some traditional verification methods may be affected by environmental factors, leading to unstable verification results.

[0004] Existing water meter verification methods have significant drawbacks, mainly manifested in large verification errors, limited applicability, and low overall efficiency, which fail to meet the requirements of modern society for the accuracy, versatility, and efficiency of water meter verification. Summary of the Invention

[0005] To improve the accuracy, scope, and efficiency of water meter calibration, this application provides a multi-position water meter calibration system and method.

[0006] In a first aspect, this application provides a multi-position water meter calibration system, including: a computer control subsystem, a water meter clamping subsystem, a flow regulation subsystem, an image acquisition subsystem, and a standard metering subsystem; The computer control subsystem is used to receive the current model of the water meter to be tested and the flow detection requirements including multiple flow points input by the user, generate a water meter clamping instruction and transmit it to the water meter clamping subsystem including the telescopic cylinder, so that after receiving the water meter clamping instruction, the water meter clamping subsystem uses the telescopic cylinder to control the cylinder to clamp the water meter to be tested, and generates a water meter clamping instruction after clamping the water meter to be tested to complete the instruction feedback. The computer control subsystem is also used to receive the water meter clamping instruction completion instruction, generate a water supply and air release instruction, and transmit it to the flow regulation subsystem including the water supply pipeline and the water supply valve and intermediate rotor flow meter valve installed on the water supply pipeline, and the standard metering subsystem including the weighing container valve, so that the flow regulation subsystem and the standard metering subsystem open the corresponding valves after receiving the water supply and air release instruction and close them after a preset time, and generate the water supply and air release completion instruction of the corresponding subsystem and send it back. The computer control subsystem is also used to receive the water supply and air release completion instructions from all subsystems. Based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, the corresponding flow point detection command is asynchronously generated to the flow regulation subsystem so that the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, opens the flow meter valve corresponding to the flow point; and after monitoring that the flow regulation subsystem, under the corresponding flow point detection command condition, has the flow meter measured flow reaching the preset target water volume of the flow point, a flow meter valve closing command is generated to the flow regulation subsystem so that it closes the corresponding flow meter valve; The computer control subsystem is also used to generate an image acquisition command and send it to the image acquisition subsystem after the flow regulation subsystem detects that the flow meter valve corresponding to each flow point is closed, so that it can acquire the image of the water meter to be calibrated; at the same time, it generates a metering command and sends it to the standard metering subsystem to acquire the water quality; it acquires the first water volume based on the image of the water meter to be calibrated, and acquires the second water volume based on the water quality; it is also used to compare the error value of the first water volume and the second water volume corresponding to each flow point with the preset calibration error corresponding to each flow point, acquire the calibration result of the current flow point, and after completing the calibration of all flow points, generate a water meter release command and send it to the water meter clamping subsystem so that after receiving the water meter release command, it can use the telescopic cylinder to control the cylinder to release the water meter to be calibrated, analyze and acquire the calibration results of all flow points, and generate a calibration report of the water meter to be calibrated.

[0007] By adopting the above scheme, the following steps are performed sequentially: clamping, water flow and air release, flow rate detection, image acquisition and water quality acquisition, and flow rate detection error verification. The entire process is accurate and easy to operate, and it can be applied to the comprehensive verification of various types of water meters, achieving broad and accurate calibration. High-precision electronic scales and computer's fast mathematical algorithms are used to eliminate human error and improve calibration accuracy. The system automatically completes operations such as reading the flow rate of the tested water meter and standard container, flow rate switching, error calculation, and report generation, achieving efficient water meter verification.

[0008] Preferably, the computer control subsystem is further configured to, after receiving the water supply and air release completion instructions from all subsystems, generate a pressure resistance test instruction and transmit it to the flow regulation subsystem including the booster cylinder valve, so that the flow regulation subsystem opens the booster cylinder valve and pressurizes the water supply pipeline after receiving the pressure resistance test instruction; it is also configured to, after monitoring whether the pressure resistance test of the flow regulation subsystem has passed, generate a pressure resistance test completion instruction or a pressure resistance test failure instruction accordingly, so that the flow regulation subsystem closes the booster cylinder valve after receiving the pressure resistance test completion instruction or the pressure resistance test failure instruction; The computer control subsystem is further configured to, upon receiving a pressure test completion command, asynchronously generate corresponding flow point detection commands to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This allows the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the corresponding flow point. This is used in place of receiving water supply and air release completion commands from all subsystems and asynchronously generating corresponding flow point detection commands to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. It is also configured to, upon generating a pressure test failure command, stop executing the operation of asynchronously generating corresponding flow point detection commands to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, thereby allowing the flow regulation subsystem to open the flow meter valve corresponding to the corresponding flow point. Finally, it generates a water supply pipeline update prompt.

[0009] By adopting the above scheme, a pressure test is added after the water supply and air release are completed to check whether the water meter is leaking and whether the calibration pipeline is leaking. This ensures that the subsequent calibration work can be carried out under the condition of no water leakage and no pipeline leakage, thereby improving the accuracy and reliability of water meter calibration. Furthermore, the corresponding flow meter valve is opened for flow detection only after the pressure test is completed, to avoid the flow detection results being affected by factors such as water leakage.

[0010] Preferably, the computer control subsystem is further configured to, after detecting that the flow meter valve corresponding to each flow point detection is closed by the flow regulation subsystem, optimize the calibration results of the water meter under test by matching a dual-pipeline switching drainage mode or an automatic compensation algorithm according to the current water meter model and the current flow point detection; the water meter model includes large-diameter screw-type and small-diameter rotary-type; the flow point detection includes at least maximum flow rate Q3 detection, boundary flow rate Q2 detection, and minimum flow rate Q1 detection; the specific matching of different water meter models and flow point detection combinations with dual-pipeline switching drainage mode or automatic compensation algorithm is determined based on the accuracy of matching the water quality corrected by the dual-pipeline switching drainage mode or automatic compensation algorithm with historical water meter models and detected flow rates; The computer control subsystem is also used to generate a reversing command to the flow regulation subsystem based on the matched dual-pipeline switching drainage mode, so that the flow regulation subsystem opens the reversing solenoid valve to realize the flow of residual water in the water supply pipeline to the weighing container in the standard metering subsystem to obtain the corrected water quality; according to the matched automatic compensation algorithm, the pre-stored pipeline geometry and material parameters, water density, current water meter model to be calibrated and current flow point detection are input into the residual moisture prediction model based on the neural network to obtain the residual moisture prediction value, and the residual moisture prediction value is used as the moisture correction value to correct the obtained water quality.

[0011] By adopting the above scheme, considering that different models of water meters have different flow indication errors, the scheme matches the dual-pipeline switching drainage mode or automatic compensation calculation for different models of water meters and each flow point detection combination, and adaptively selects an effective method to reduce the error caused by residual water in the water supply pipeline, thereby improving the accuracy of water meter calibration results.

[0012] Preferably, the computer control subsystem is also used to collect environmental parameters collected by the temperature sensor with which it has established a communication connection in real time.

[0013] By adopting the above scheme, the influence of environmental factors on the verification results is considered, which helps to improve the accuracy of water meter verification results.

[0014] Preferably, the computer control subsystem is further configured to, upon receiving the user's input of the current water meter model to be calibrated and a flow detection request containing multiple flow points, utilize a pre-built flow point detection recommendation model based on a neural network. This model inputs pre-stored water supply pipeline parameters, historical first error data for different flow point detections under different environmental parameter conditions, the current water meter model to be calibrated, and real-time environmental parameters into the flow point detection recommendation model to obtain flow point detection recommendation information. This information assists the user in reselecting a flow detection request containing multiple flow points; the flow point detection recommendation information represents the optimal set and number of flow points. The computer control subsystem is also used to, after reselecting the flow detection requirements containing multiple flow points according to the flow recommendation information, obtain the error value between the first water volume and the second water volume corresponding to the flow point after each flow point detection is completed, and supplement it into the input flow point detection recommendation model, so as to dynamically obtain flow point detection recommendation information to replace the previously obtained flow point detection recommendation information.

[0015] By adopting the above scheme, a flow point detection recommendation model based on a neural network is used to obtain flow point detection recommendation information by combining water supply pipeline parameters, historical error data, water meter model, and real-time environmental parameters. This can help users reselect more suitable flow point detection and improve the accuracy of water meter calibration. Furthermore, after obtaining the error of each flow point detection, the error value is added to the model to dynamically update the flow point detection recommendation information, further optimizing the selection of subsequent detection flow and continuously improving the accuracy of water meter calibration.

[0016] Preferably, the computer control subsystem is further configured to, before reselecting flow detection requirements containing multiple flow points based on flow point detection recommendation information and asynchronously generating corresponding flow point detection instructions, input the pre-stored water supply pipeline parameters and historical second error data of multiple flow points reselected under different flow point detection order combinations under different environmental parameter conditions, the current water meter model to be calibrated and the reselected multiple flow point detection requirements, the current pipeline residual water volume estimated in real time using the flow-time method, and real-time environmental data into the flow point detection recommendation order model to obtain the flow point detection recommendation order to assist in asynchronously generating corresponding flow point detection instructions according to the flow point detection recommendation order; The computer control subsystem is also used to, after asynchronously regenerating the corresponding flow point detection instructions according to the recommended flow point detection order, obtain the error value between the first water volume and the second water volume corresponding to the corresponding flow point after each flow point detection is completed, supplement it to the input flow point detection recommended order model, and dynamically obtain the flow point detection recommended order to replace the previously obtained flow point detection recommended order.

[0017] By adopting the above scheme, a flow point detection recommendation order model pre-built based on neural networks is used. This model combines water supply pipeline parameters, historical error data, current water meter model, multiple reselected flow point detections, real-time estimated pipeline residual water volume, and real-time environmental data to obtain a recommended flow point detection order. This assists in generating corresponding flow point detection instructions, optimizing the detection order of flow points, and reducing errors caused by improper detection order. After each flow point calibration, the corresponding error value is added to the model to dynamically update the recommended flow point detection order, further adapting to different calibration conditions and improving the accuracy and reliability of the calibration results.

[0018] Preferably, the computer control subsystem is further configured to, after detecting that the flow regulation subsystem closes the flow meter valve corresponding to each flow point, generate multiple image acquisition commands and transmit them to the image acquisition subsystem to acquire the image of the water meter to be calibrated; simultaneously generate multiple metering commands and transmit them to the standard metering subsystem to obtain the water quality; identify and obtain the first water volume for each of the multiple images of the water meter to be calibrated and take the average value; and calculate and obtain the second water volume based on the water quality measured multiple times and take the average value.

[0019] By adopting the above scheme, instructions are sent to the image acquisition subsystem and the standard metering subsystem multiple times, and the average value of the acquired data is taken, thereby reducing measurement errors and improving the accuracy and reliability of water meter calibration results.

[0020] Secondly, this application provides a method for calibrating multi-position water meters using a multi-meter water meter calibration system, comprising: The computer control subsystem receives the current model of the water meter to be tested and the flow detection requirements including multiple flow points from the user input, and generates a water meter clamping instruction accordingly, which is then transmitted to the water meter clamping subsystem containing a telescopic cylinder. After receiving the water meter clamping instruction, the water meter clamping subsystem uses the telescopic cylinder to control the cylinder to clamp the water meter to be tested, and after clamping the water meter to be tested, it generates a water meter clamping instruction and sends the instruction back to the computer control subsystem. After receiving the water meter clamping instruction and completing the instruction, the computer control subsystem generates a water flow and air release instruction and transmits it to the flow regulation subsystem, which includes the water supply pipeline and the water supply valve and intermediate rotor flow meter valve installed on the water supply pipeline, and the standard metering subsystem, which includes the weighing container valve. This allows the flow regulation subsystem and the standard metering subsystem to open the corresponding valves after receiving the water flow and air release instruction and close them after a preset time. The corresponding subsystem generates a water flow and air release completion instruction and sends it back to the computer control subsystem. After receiving the water flow and air release completion instructions from all subsystems, the computer control subsystem asynchronously generates corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This causes the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the flow point. Upon monitoring that the flow regulation subsystem, under the corresponding flow point detection instruction conditions, has reached the preset target water volume of the flow point, a flow meter valve closing instruction is generated and sent to the flow regulation subsystem to close the corresponding flow meter valve. The computer control subsystem, upon detecting the closure of the flow meter valve corresponding to each flow point by the flow regulation subsystem, generates an image acquisition command and sends it to the image acquisition subsystem to acquire the image of the water meter to be calibrated. Simultaneously, it generates a metering command and sends it to the standard metering subsystem to obtain the water quality. Based on the image of the water meter to be calibrated, it identifies the first water volume and calculates the second water volume based on the water quality. The computer control subsystem compares the error values ​​of the first and second water volumes corresponding to each flow point with the preset calibration error for each flow point to obtain the calibration result for the current flow point. After completing the calibration of all flow points, it generates a water meter release command and sends it to the water meter clamping subsystem. Upon receiving the release command, the clamping subsystem uses a telescopic cylinder to release the water meter to be calibrated. It then analyzes and obtains the calibration results of all flow points and generates a calibration report for the water meter to be calibrated.

[0021] By adopting the above scheme, the water meter is clamped by a telescopic cylinder, and the gas in the pipeline can be discharged by water flow and air exhaust, which reduces the influence of gas on the verification results. The error value between the first water volume and the second water volume corresponding to each flow point is measured and compared to complete the verification. Finally, the verification result of the water meter to be verified is obtained, realizing the automated verification of the water meter, avoiding interference from human factors, and improving the accuracy and efficiency of the verification.

[0022] Thirdly, this application provides a computer-readable storage medium including a stored computer program, wherein the computer program, when running, controls the device where the computer-readable storage medium is located to perform the method described above.

[0023] Fourthly, this application provides a computer device, the computer device including a memory, a processor and a program stored in the memory and executable thereon, the program being executed by the processor to implement the steps of the method described above.

[0024] In summary, this application has the following beneficial effects: 1. The system is set up to perform operations such as clamping, water supply and air release, flow detection, image acquisition and water quality acquisition, and flow point verification in sequence according to a specific process, so as to realize the automated verification of water meters, effectively avoid human error, improve the accuracy of verification, and is applicable to the verification of various models of water meters. It can also eliminate the influence of pipeline gas on the verification results. 2. Based on different water meter models and flow point detection combinations, adaptive matching of dual-pipeline switching drainage mode or automatic compensation algorithm is used to optimize the verification results of the water meters to be verified, improve the accuracy of corrected water quality, reduce errors caused by residual water in the water supply pipeline, and make the verification results more accurate and reliable. 3. By utilizing a pre-built flow point detection recommendation model or a pre-built flow point detection order recommendation model based on a neural network, users can be assisted in reselecting a more suitable flow point detection or flow point detection order, thereby improving the accuracy of water meter verification. Furthermore, after each flow point detection is completed, the corresponding detected water volume error value is added to the model, dynamically updating the flow point detection recommendation information or flow point detection order, further improving the accuracy and reliability of the verification results. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the multi-position water meter calibration system described in a specific embodiment; Figure 2 This is a flowchart of the multi-position water meter calibration method described in a specific embodiment; Figure 3 This is a flowchart illustrating the process of obtaining the first water volume in the multi-position water meter calibration method described in a specific embodiment; Figure 4 This is a flowchart illustrating the process of obtaining the second water volume in the multi-position water meter calibration method described in a specific embodiment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] like Figure 1 As shown in the figure, this application discloses a multi-position water meter calibration system, which specifically includes: The system comprises a computer control subsystem 1, a water meter clamping subsystem 2, a flow regulation subsystem 3, an image acquisition subsystem 4, a standard metering subsystem 5, and a water supply circulation subsystem 6. These subsystems communicate and cooperate with each other and operate in an orderly manner. The computer control subsystem provides unified scheduling, which automates and standardizes the entire verification process, thereby improving the accuracy and efficiency of water meter verification and reducing human error.

[0028] The computer control subsystem 1, crucial for the verification of multi-position water meters, includes a computer host, control software, and related communication modules. The host computer is selected for its stable performance and high processing speed. The control software is developed using advanced programming technology and features a user-friendly interface. The communication modules utilize wired Ethernet communication or wireless Bluetooth / WiFi communication. The water meter clamping subsystem 2 comprises a telescopic cylinder and a cylinder control device. The telescopic cylinder's piston rod extends and retracts to clamp and release the water meter under verification, facilitating measurement connection and disconnection. The cylinder control device controls the movement of the telescopic cylinder. The flow regulation subsystem 3 includes components such as a water supply pipeline, water supply valves installed on the water supply pipeline, intermediate rotor flowmeter valves, booster cylinder valves, reversing solenoid valves, and pressure sensors. The water supply pipeline typically uses corrosion-resistant materials. The water supply valves control the inflow of water and can be electric or pneumatic, capable of quickly and accurately opening and closing according to instructions from the computer control subsystem. The intermediate rotor flowmeter valves regulate the water flow rate; their internal rotors rotate according to the water flow magnitude, thus achieving flow measurement and regulation. The booster cylinder valves pressurize the water supply pipeline during pressure testing, ensuring the pipeline and water meter can withstand a certain pressure without leakage. The reversing solenoid valves redirect residual water in the water supply pipeline to branch lines. The flow regulation subsystem 3 also includes multiple instantaneous flowmeters, each equipped with a flow regulation valve. The instantaneous flowmeters measure the water flow rate in real time, and their measurement accuracy directly affects the accuracy of the calibration results. The flow regulation valves are used to select flowmeters with different ranges for different flow points to ensure reading accuracy.

[0029] The image acquisition subsystem 4 includes an industrial camera; this camera features high resolution, high frame rate, and good anti-interference capabilities, and is used to capture images of the dial of the water meter to be calibrated. The standard metrology subsystem 5 includes an electronic scale, a water quality temperature sensor, and a weighing container; the electronic scale uses a high-precision load cell to accurately measure the mass of water in the weighing container; the water quality temperature sensor is used to collect the temperature of the water medium; and the weighing container has good sealing and stability, and is used to hold and weigh the water. The water supply circulation subsystem 6 includes a water pump, which pumps water into a storage tank after calibration is completed and the bottom valve of the weighing container is opened, achieving water supply circulation and conserving water resources.

[0030] Based on the above system, the automatic calibration of multi-position water meters mainly involves several parts of operation, each part involving the collaboration of multiple systems, specifically including: Part 1: Water meter clamping operation.

[0031] The computer control subsystem 1 is used to collect the current water meter model to be calibrated and the flow detection requirements including multiple flow points input by the user through the operation interface, generate water meter clamping instructions and transmit them to the water meter clamping subsystem; wherein, in order to ensure that the water meter's measurement accuracy, repeatability, stability and other indicators meet national or international standards (such as ISO4064, JJG 162), each type of multi-position water meter flow point detection includes at least: maximum flow Q3, boundary flow Q2 and minimum flow Q1, etc., and the indication error of each flow point detection is different.

[0032] The water meter clamping subsystem 2 is used to control the cylinder to clamp the water meter to be tested using a telescopic cylinder after receiving the water meter clamping instruction, and to generate a water meter clamping instruction and send the completion instruction back to the computer control subsystem 1 after clamping the water meter to be tested.

[0033] Part Two: Water and Gas Exhaust Operation; To prevent gas in the pipeline from affecting the calibration results, the system can drain the gas in the pipeline.

[0034] The computer control subsystem 1 is also used to generate a water flow and air release command after receiving the water meter clamping instruction completion command and synchronously transmit it to the flow regulation subsystem 3 and the standard metering subsystem 5.

[0035] The flow regulation subsystem 3 is used to receive a water supply and air release command, open the water inlet valve and the intermediate rotor flowmeter valve, and close them after a preset time (e.g., 60s), generating a water supply and air release completion command for the flow regulation subsystem and sending it back to the computer control subsystem. The standard metering subsystem 5 is used to receive a water supply and venting command, open the valve at the bottom of the weighing container, and close it after a preset time (e.g., 60s), and generate a water supply and venting completion command for the standard metering subsystem to be sent back to the computer control subsystem 1.

[0036] Part Three: Traffic Detection Operations.

[0037] The computer control subsystem 1 is further configured to execute a flow point detection operation after receiving the water flow and air venting completion instructions from the flow regulation subsystem and the standard metering subsystem. The flow point detection operation includes asynchronously generating corresponding flow point detection instructions based on the model of the water meter to be calibrated and the flow detection requirements involving multiple flow points. Considering that each type of multi-position water meter flow point detection includes at least the detection of the maximum flow rate Q3, the boundary flow rate Q2, and the minimum flow rate Q1, a corresponding flow point detection instruction is asynchronously generated and sent to the flow regulation subsystem 3 for each flow point detection. Asynchronous generation of the corresponding flow point detection instruction means that after the previous flow point detection is completed, the next flow point detection instruction is generated; for example, the flow detection instruction for Q3 at time T1, the flow detection instruction for Q2 at time T2, and the flow detection instruction for Q1 at time T3.

[0038] The flow regulation subsystem 3 is also used to open the corresponding flow meter valve (e.g., a flow meter adapted to the Q3 flow range) upon receiving a corresponding flow point detection command (e.g., Q3 flow detection command), and send the flow measured and recorded by the flow meter to the computer control subsystem 1 in real time; The computer control subsystem 1 is further configured to generate a flow meter valve closing command and send it to the flow regulation subsystem after monitoring that the flow rate measured and recorded by the corresponding flow meter valve (e.g., a flow meter adapted to the Q3 flow range) reaches the preset target water volume at the corresponding flow point under the condition of the flow regulation subsystem 3's corresponding flow point detection command (e.g., Q3 flow detection command). Specifically, at a certain flow rate (e.g., Q1, Q2, or Q3), after the accumulation of time t, the water volume measured and recorded by the flow meter reaches the preset water volume V3. Here, "flow point" refers to the metering point at a specific flow rate, while "water volume V3" is the preset target water volume to be reached or measured at that flow point, where q (flow rate) * t (time) = V3.

[0039] The flow regulation subsystem 3 is also used to close the corresponding flow meter valve (e.g., a flow meter adapted to the Q3 flow range) when a flow meter valve closing command is received.

[0040] The computer control subsystem 1 is also used to monitor the closure status of the flow meter valve in the flow regulation subsystem 3 in real time, and to continue generating the next flow point detection command when the flow meter valve in the flow regulation subsystem 3 is closed, until all flow detections are completed.

[0041] Part Four: Image Acquisition, Water Quality Acquisition, and Flow Point Verification Result Acquisition Operation Section.

[0042] The computer control subsystem 1 is also used to generate an image acquisition command and transmit it to the image acquisition subsystem 4 after the flow regulation subsystem closes the flow meter valve corresponding to each flow point detection (i.e., completes the detection of one flow point). At the same time, it generates a metering command and transmits it to the standard metering subsystem 5. The image acquisition subsystem 4 is used to acquire the image of the water meter to be tested when it receives an image acquisition command generated based on a flow point detection, and transmit it to the computer control subsystem 1.

[0043] The standard metering subsystem 5 is used to measure and acquire water quality when it receives a metering command generated based on a flow point detection, and transmit it to the computer control subsystem 1. The computer control subsystem 1 is also used to receive the image of the water meter to be tested based on a flow point detection, and to identify and obtain the first water volume according to the image recognition algorithm. The specific identification process includes: searching the water meter database based on the captured photo, comparing with the existing water meter dial model, finding the same water meter dial model as the current water meter, locating the pointer position information, using the pointer recognition method to start locating the center of the pointer, projecting the direction of the pointer and the farthest point and drawing a line, calculating the real-time angle and converting it into the first water volume value V1. The computer control subsystem 1 is also used to receive the current water mass measured based on a flow point detection, and, in conjunction with a temperature search database, find the density of water at the corresponding temperature. According to m / =V formula is used to calculate the second water volume V2 in the weighing container; where the water temperature is generally fixed, in order to further improve the accuracy of the measurement results, it is also used to receive water temperature data collected in real time by the water temperature sensor in the standard metrology subsystem 5 to determine the density of water at the corresponding temperature. The second water volume V2 is obtained by searching and then calculating.

[0044] The computer control subsystem 1 is also used to compare the error value between the first water volume and the second water volume corresponding to each flow point ( The system uses a preset verification error for each flow point (e.g., the preset verification error for Q1 is 2%, which is the aforementioned indication error) to complete the verification of the current flow point and obtain the verification result. The specific verification process includes comparing the error value between the first and second water volumes corresponding to each flow point with the preset verification error corresponding to that flow point. If the error value is lower than the preset verification error, the verification result of the current flow point is considered to be that there is no error in the verification of the water meter corresponding to the current flow point; otherwise, the verification result of the current flow point is considered to be that there is an error in the verification of the water meter corresponding to the current flow point. The system is also used to analyze and obtain the verification results of all flow points and generate a verification report for the water meter to be verified.

[0045] The computer control subsystem 1 is also used to generate a water meter unclamping command and transmit it to the water meter clamping subsystem 2 after all flow point calibrations are completed. The water meter clamping subsystem 2 is also used to control the cylinder to release the water meter to be calibrated using a telescopic cylinder after receiving the water meter release command.

[0046] Furthermore, to further ensure the accuracy of the collected images of the water meters to be calibrated and the water quality, multiple acquisitions can be performed. The computer control subsystem 1 is also used to generate image set instructions multiple times within a preset time after the flow regulation subsystem closes the flow meter valve corresponding to each flow point detection (i.e., completes the detection of one flow point). This is to send the instructions to the image acquisition subsystem multiple times so that it can acquire images of the water meters to be calibrated multiple times. Simultaneously, it generates metering instructions multiple times and sends them to the standard metering subsystem so that it can acquire water quality multiple times. For multiple images of the water meters to be calibrated, the first water volume is identified and averaged. The averaged first water volume represents the first water volume corresponding to the corresponding flow point. The second water volume is calculated and averaged based on the water quality measured multiple times. The averaged second water volume represents the second water volume corresponding to the corresponding flow point.

[0047] The above system enables unified scheduling and control of various subsystems through a computer control subsystem, thereby achieving automation and standardization of water meter calibration.

[0048] In one specific embodiment, the difference between this embodiment and the above embodiments is that the above embodiments typically assume that the selected drainage pipes are leak-free, but in this embodiment, to ensure that subsequent verification work is carried out under leak-free conditions, a pressure resistance test is added after water flow and air venting to improve the accuracy and reliability of water meter verification; the system also includes: The computer control subsystem 1 is also used to receive the water supply and air release completion instructions from all subsystems, generate a pressure resistance test instruction, and transmit it to the flow regulation subsystem 3. The flow regulation subsystem 3 is also used to open the booster cylinder valve and pressurize the water supply pipeline when a pressure test command is received; The computer control subsystem 1 is also used to monitor whether the pressure resistance test of the flow regulation subsystem has passed and generate a pressure resistance test completion command or a pressure resistance test failure command accordingly. The monitoring of whether the pressure resistance test has passed is carried out by using a pressure sensor attached to the water supply pipeline to obtain the pressure of the water supply pipeline in real time. When the pressure reaches a preset value and is maintained for a period of time, if there is no abnormal situation such as pressure drop, the pressure resistance test is determined to have passed and a pressure resistance test completion command is generated accordingly. Otherwise, the pressure resistance test is determined to have failed and a pressure resistance test failure command is generated accordingly.

[0049] The flow regulation subsystem 3 is also used to close the booster cylinder valve after receiving a pressure test completion command or a pressure test failure command.

[0050] The computer control subsystem 1 is further configured to, upon receiving a pressure test completion instruction, asynchronously generate corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, so that the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, opens the flow meter valve corresponding to the corresponding flow point instead of, upon receiving water supply and air release completion instructions returned by all subsystems, asynchronously generate corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, so that the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, opens the flow meter valve corresponding to the corresponding flow point; and further configured to, upon generating a pressure test failure instruction, stop executing the operation of asynchronously generating corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, so that the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, opens the flow meter valve corresponding to the corresponding flow point, and generate a water supply pipeline update prompt.

[0051] In a specific embodiment, the difference between this embodiment and the above embodiments is that, since there is water in the water supply pipeline that is not being weighed during weighing, the actual flow rate of the water meter is more than the weighed water. To reduce or even eliminate this error, before verification, the water in this part of the pipeline can be drained into the weighing container or automatic compensation can be performed. The system includes: The computer control subsystem 1 is further configured to optimize the calibration results of the water meter after the flow regulation subsystem closes the flow meter valve corresponding to each flow point detection, i.e., after a flow point detection is completed, by matching the dual-pipeline switching drainage mode or the automatic compensation algorithm according to the current water meter model and the current flow point detection. The water meter model includes large-diameter screw-type and small-diameter rotary-type. The flow point detection includes at least the maximum flow rate Q3 detection, the boundary flow rate Q2 detection, and the minimum flow rate Q1 detection.

[0052] The reason for matching is that the error in residual water content is influenced by factors including the flow rate range. For example, the residual water content is higher at the minimum flow rate Q1 and lower at the maximum flow rate Q3. The error in residual water content is also influenced by the water meter model. For instance, rotor-type water meters are sensitive to the maximum flow rate (Q3), where residual water may be discharged quickly at high flow rates, but is prone to stagnation at the minimum flow rate (Q1) due to low flow rates. When the residual water content is high, direct drainage is suitable. When the residual water content is low, automatic compensation algorithms are suitable to correct for minor residual water and flow fluctuation errors. Therefore, different water meter models and test flow rates require different methods.

[0053] Specifically, for different water meter models and flow point detection combinations (e.g., maximum flow rate Q3 detection for rotor water meters), the matching of dual-pipeline switching drainage mode or automatic compensation algorithm is determined based on the accuracy of matching the water quality corrected by the dual-pipeline switching drainage mode or automatic compensation algorithm with the historical water meter models and detected flow rates. The method with the higher accuracy is selected for matching.

[0054] The computer control subsystem 1 is also used to generate a reversing command to the flow regulation subsystem 3 according to the matched dual-pipeline switching drainage mode; the flow regulation subsystem 3 is also used to open the reversing solenoid valve after receiving the reversing command, so as to realize the residual water in the water supply pipeline flows to the weighing container in the standard metering subsystem to obtain the corrected water quality. The computer control subsystem 1 is further configured to, based on the matched automatic compensation algorithm, input pre-stored pipeline geometry and material parameters of the water supply pipeline, water density, the current water meter model to be calibrated, and the current flow point detection into a residual moisture estimation model pre-built based on a neural network to obtain a residual moisture estimate. The residual moisture estimate is then used as a moisture correction value to correct the obtained water quality, i.e., the corrected water quality = the original water quality + the moisture correction value. The residual moisture estimation model is input to the pipeline geometry and material parameters of the water supply pipeline, water density, the current water meter model to be calibrated, and the current flow point detection, and outputs the residual moisture estimate. It is generated by training with several historically acquired pipeline geometry and material parameters, water density, water meter model to be calibrated, flow point detection data, and actual residual moisture values ​​under corresponding conditions.

[0055] In a specific embodiment, although the standard clearly specifies the core traffic points (Q1-Q3), additional traffic points (such as 0.8Q1, 1.2Q2) are allowed in actual testing or quality control to cover real-world application scenarios and achieve more stringent performance verification; the system also includes: The computer control subsystem 1 is further configured to, upon receiving the user's input of the current water meter model to be calibrated and the flow detection requirement containing multiple flow points, utilize a pre-built flow point detection recommendation model based on a neural network. This model inputs pre-stored water supply pipeline parameters, historical first error data under different flow point detection conditions with varying environmental parameters, the current water meter model to be calibrated, and real-time environmental parameters into the flow point detection recommendation model to obtain flow point detection recommendation information. This information assists the user in reselecting the flow detection requirement containing multiple flow points; the flow point detection recommendation information represents the optimal set and number of flow points. In this process, considering that different environmental parameters (such as temperature) can affect the calibration results of a specific water meter model in a specific water supply pipeline, the flow point detection recommendation model is designed to minimize the error data under the current environmental parameters by using historical first error data from multiple flow point detections under different environmental parameter conditions (including the set and number of flow points). The model inputs of the flow point detection recommendation model include: water meter parameters (such as water meter model), environmental parameters (such as temperature), historical first error data (such as average error, variance, and maximum / minimum error under different flow point sets), and water supply pipeline parameters (such as pipeline geometric characteristics). The model output of the flow point detection recommendation model is the flow point detection recommendation information, i.e., the optimal set and number of flow points, such as: {0.8Q1, Q1, Q2, 1.2Q2, Q3}, with a quantity of 5. The flow point detection recommendation model is generated through training using several historical water meter parameters, environmental parameters, historical first error data, water supply pipeline parameters, and flow point detection recommendation information marked by experts based on historical error data.

[0056] To further ensure the accuracy of the verification, a dynamic flow point adjustment strategy can be selected. The computer control subsystem 1 is also used to, after reselecting the flow detection requirements containing multiple flow points according to the flow recommendation information, obtain the error value between the first water volume and the second water volume corresponding to the flow point after the detection of each flow point is completed, and supplement it into the input flow point detection recommendation model to dynamically obtain flow point detection recommendation information to replace the previously obtained flow point detection recommendation information.

[0057] Furthermore, considering that the measurement order of the optimal flow point set directly affects the cumulative effect of factors such as residual moisture in the pipeline and temperature fluctuations on errors in water meter calibration using the static mass method and the flow-time method, the system comprehensively considers physical constraints, error propagation laws, and dynamic environmental changes, and optimizes the measurement order using a neural network algorithm to improve calibration accuracy. Specifically, the system also includes: The computer control subsystem 1 is further configured to, before reselecting flow detection requirements containing multiple flow points based on flow point detection recommendation information and asynchronously generating corresponding flow point detection instructions, input the pre-stored water supply pipeline parameters and error data of multiple flow points (i.e., specific flow point sets) reselected under different detection order combinations under different historical environmental parameter conditions, the current water meter model to be calibrated and the reselected multiple flow point detection requirements, the current pipeline residual water volume estimated in real time using the flow-time method, and real-time environmental data into the flow point detection recommendation order model to obtain the flow point detection recommendation order to assist in asynchronously generating corresponding flow point detection instructions according to the flow point detection recommendation order; In particular, considering that different environmental parameters (such as temperature), different detection sequences of specific flow point sets, and the current residual water volume in the pipeline can affect the verification results of a specific model of water meter in a specific water supply pipeline, the flow point detection sequence with the smallest second error data is determined based on the different detection sequences of different environmental parameters and specific flow point sets, as well as the second historical error data of the residual water volume in the water supply pipeline before each flow point detection.

[0058] The input to the flow point detection recommendation model includes: current water meter parameters (e.g., water meter model), multiple reselected flow point sets, environmental parameters (e.g., temperature), historical second error data (e.g., average error, variance, and maximum / minimum error of a specific flow point set (reselected by the user) under different detection sequences), current residual water volume in the pipeline before flow point detection, and water supply pipeline parameters (e.g., pipeline geometric characteristics). The output of the flow point detection recommendation model is the flow point detection recommendation sequence, such as: {Q3, 1.2Q2, Q2, Q1, 0.8Q1}. The flow point detection recommendation model is generated through training using several historical water meter parameters, environmental parameters, historical second error data, residual water volume in the water supply pipeline before detection of a specific flow point set corresponding to the historical second error data, water supply pipeline parameters, and the flow point detection recommendation sequence determined by experts based on the historical second error data.

[0059] Similarly, to further ensure the accuracy of the verification, a dynamic flow point order adjustment strategy can be selected. The computer control subsystem 1 is also used to asynchronously generate the corresponding flow point detection instructions according to the recommended flow point detection order, and after each flow point detection is completed, obtain the error value between the first water volume and the second water volume corresponding to the flow point, and supplement it to the input flow point detection recommended order model to dynamically obtain the flow point detection recommended order to replace the previously obtained flow point detection recommended order.

[0060] like Figure 2 As shown in the figure, this application discloses a method for calibrating a multi-position water meter, including: S1. The water meter clamping is completed using a computer control subsystem.

[0061] Specifically, this includes: using a computer control subsystem to receive the user's input of the current water meter model to be calibrated and the flow detection requirements including multiple flow points, and generating a water meter clamping instruction accordingly, which is then transmitted to a water meter clamping subsystem containing a telescopic cylinder. After receiving the water meter clamping instruction, the water meter clamping subsystem uses the telescopic cylinder to control the cylinder to clamp the water meter to be calibrated, and after clamping the water meter to be calibrated, it generates a water meter clamping instruction and sends the completed instruction back to the computer control subsystem.

[0062] S2. The water supply and air release are controlled by a computer control subsystem.

[0063] After receiving the water meter clamping instruction, the computer control subsystem generates a water flow and air release instruction and transmits it to the flow regulation subsystem, which includes the water supply pipeline and the water supply valves and intermediate rotor flowmeter valves installed on the water supply pipeline, and the standard metering subsystem, which includes the weighing container valves. This allows the flow regulation subsystem and the standard metering subsystem to open the corresponding valves after receiving the water flow and air release instruction and close them after a preset time, generating a water flow and air release completion instruction for the corresponding subsystem and sending it back to the computer control subsystem.

[0064] S3. Use the computer control subsystem to control and complete the flow detection.

[0065] After receiving the water flow and air release completion instructions from all subsystems, the computer control subsystem asynchronously generates corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This causes the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the flow point. Upon monitoring that the flow regulation subsystem, under the corresponding flow point detection instruction conditions, has measured the flow rate of the corresponding flow meter to reach the preset target water volume of the flow point, it generates a flow meter valve closing instruction to the flow regulation subsystem to close the corresponding flow meter valve.

[0066] S4. The computer control subsystem is used to control the acquisition of the first and second water volumes, thereby obtaining the flow error verification and generating a verification report.

[0067] The computer control subsystem, upon detecting the closure of the flow meter valve corresponding to each flow point by the flow regulation subsystem, generates an image acquisition command and sends it to the image acquisition subsystem to acquire the image of the water meter to be calibrated. Simultaneously, it generates a metering command and sends it to the standard metering subsystem to obtain the water quality. Based on the image of the water meter to be calibrated, it identifies the first water volume and calculates the second water volume based on the water quality. The computer control subsystem compares the error values ​​of the first and second water volumes corresponding to each flow point with the preset calibration error for each flow point to obtain the calibration result for the current flow point. After completing the calibration of all flow points, it generates a water meter release command and sends it to the water meter clamping subsystem. Upon receiving the release command, the clamping subsystem uses a telescopic cylinder to release the water meter to be calibrated. It then analyzes and obtains the calibration results of all flow points and generates a calibration report for the water meter to be calibrated.

[0068] like Figure 3 As shown, step S4 above, which utilizes a computer control subsystem to control the acquisition of the first water volume, also includes: S411. Use the computer control subsystem to generate image acquisition commands and send them to the image acquisition subsystem; S412. Use the image acquisition subsystem to acquire images of the water meter to be tested and transmit them back to the computer control subsystem. S413. Analyze the collected images of the water meter to be tested using the computer control subsystem; The specific analysis process includes: searching the water meter database based on the collected images of the water meter to be tested, comparing with existing water meter dial models, finding the same water meter dial model as the current water meter, locating the pointer position information, using pointer-type recognition to locate the center of the pointer, projecting the direction of the pointer and the farthest point, and drawing a line. S414. The computer control subsystem calculates the real-time angle based on the image analysis results and converts it into the first water volume indication value. S415. The computer control subsystem is used to display the first water volume reading.

[0069] like Figure 4 As shown, step S4 above, which utilizes a computer control subsystem to control the acquisition of the second water volume, also includes: S421. Use the computer control subsystem to generate water quality measurement commands to the standard metrology subsystem; S422. Utilize the standard metering subsystem to measure water quality and transmit the data back to the computer control subsystem; S423. Analyze the measured water quality and water temperature using the computer control subsystem, and calculate to obtain the second water volume reading. The specific analysis process includes: receiving the current water mass measured at a flow point, and searching a temperature database to find the density of water at the corresponding temperature. According to m / The formula =V is used to calculate the second water volume V2 in the weighing container; S424. The second water volume is displayed using a computer control subsystem.

[0070] This application also discloses a computer-readable storage medium.

[0071] Specifically, the computer-readable storage medium stores a computer program that can be loaded by a processor and executed as described above for the multi-position water meter verification method. The computer-readable storage medium includes, for example, various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0072] This application also discloses a computer device.

[0073] Specifically, the computer device includes a memory and a processor, and the memory stores a computer program that can be loaded by the processor and executed in accordance with the above-mentioned multi-position water meter verification method.

[0074] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A multi-position water meter calibration system, characterized in that, include: Computer control subsystem, water meter subsystem, flow regulation subsystem, image acquisition subsystem, and standard metering subsystem; The computer control subsystem receives the user's input of the current water meter model to be calibrated and the flow detection requirement including multiple flow points. The water meter clamping subsystem clamps the water meter to be calibrated using a telescopic cylinder based on the water meter clamping command. The flow regulation subsystem, including water supply valves and intermediate rotor flowmeter valves, and the standard metering subsystem, including weighing containers, open the corresponding valves based on water supply and air release commands and close them after a preset time. A flow regulation subsystem containing multiple flow meters with different ranges and flow regulating valves opens the flow meter valve corresponding to the corresponding flow point based on the corresponding flow point detection command, and closes the corresponding flow meter valve after the computer control subsystem monitors that the flow measured by the corresponding flow meter has reached the preset target water volume of the flow point. After the flow regulation subsystem detects that the flow meter valve corresponding to each flow point is closed, the image acquisition subsystem acquires the image of the water meter to be calibrated based on the image acquisition command, and the standard metering subsystem obtains the water quality based on the metering command; the first water volume is obtained based on the image of the water meter to be calibrated, and the second water volume is obtained based on the water quality calculation; the error value of the first water volume and the second water volume corresponding to each flow point is compared with the preset calibration error corresponding to each flow point to obtain the calibration result of the current flow point. After all flow points are calibrated, a water meter release command is generated, and the water meter clamping subsystem uses a telescopic cylinder to release the water meter to be calibrated based on the water meter release command. Analyze and obtain the calibration results of all flow points and generate a calibration report for the water meter to be calibrated; After the flow regulation subsystem detects that the flow meter valve corresponding to each flow point is closed, it optimizes the calibration results of the water meter by matching the dual-pipeline switching drainage mode or the automatic compensation algorithm according to the current water meter model and the current flow point detection. The dual-pipeline switching drainage mode refers to the flow regulation subsystem opening the reversing solenoid valve to realize the flow of residual water in the water supply pipeline to the weighing container in the standard metering subsystem to obtain the corrected water quality. The automatic compensation algorithm inputs the pre-stored pipeline geometry and material parameters, water density, current water meter model and current flow point detection into a residual moisture prediction model based on a neural network to obtain the residual moisture prediction value, and uses the residual moisture prediction value as the moisture correction value to correct the obtained water quality. Using a pre-built flow point detection recommendation model based on neural networks, the pre-stored water supply pipeline parameters, historical first error data of different flow point detection under different environmental parameter conditions, the current water meter model to be calibrated, and real-time environmental parameters are input into the flow point detection recommendation model to obtain flow point detection recommendation information. Traffic point detection recommendation information consists of the set and number of optimal traffic points; After each flow point detection is completed, the error value between the first and second water volumes corresponding to the flow point is obtained and added to the input flow point detection recommendation model. Flow point detection recommendation information is dynamically obtained to replace the previously obtained flow point detection recommendation information.

2. The multi-position water meter calibration system according to claim 1, characterized in that, The computer control subsystem generates a pressure resistance test command, which causes the flow regulation subsystem, including the booster cylinder valve, to open the booster cylinder valve and pressurize the water supply pipeline based on the received pressure resistance test command. After monitoring whether the pressure test of the flow regulation subsystem has passed, a pressure test completion command or a pressure test failure command is generated accordingly, so that the flow regulation subsystem can close the booster cylinder valve based on the pressure test completion command or the pressure test failure command. Upon receiving the pressure resistance test completion instruction, the system asynchronously generates corresponding flow point detection instructions based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This allows the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the corresponding flow point. After receiving the water flow and air release completion instruction generated and transmitted back by all subsystems, the system asynchronously generates corresponding flow point detection instructions based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This allows the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the corresponding flow point. After generating a pressure test failure command, the execution stops. Based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points, the corresponding flow point detection command is asynchronously generated to the flow regulation subsystem. This allows the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the valve of the flow meter corresponding to the flow point. An update prompt message for the water supply pipeline is generated.

3. The multi-position water meter calibration system according to claim 1, characterized in that, The water meter models include large-diameter spiral vane type and small-diameter rotary vane type; the flow point detection includes at least maximum flow rate Q3 detection, boundary flow rate Q2 detection, and minimum flow rate Q1 detection; different combinations of water meter models to be calibrated and flow point detection are specifically matched with dual-pipeline switching drainage mode or automatic compensation algorithm. The accuracy of matching the water quality corrected by the dual-pipeline switching drainage mode or automatic compensation algorithm with the historical water meter models to be calibrated and the detected flow rate is determined.

4. The multi-position water meter calibration system according to claim 1, characterized in that, The computer control subsystem is also used to collect environmental parameters in real time from the temperature sensors with which it has established a communication connection.

5. The multi-position water meter calibration system according to claim 1, characterized in that, The computer control subsystem is also used to input the pre-stored water supply pipeline parameters and historical second error data of multiple flow points under different flow point detection sequence combinations under different environmental parameter conditions, the current water meter model to be calibrated and the multiple flow point detection requirements, the current pipeline residual water volume estimated in real time by the flow-time method, and real-time environmental data into the flow point detection recommendation sequence model to obtain the flow point detection recommendation sequence to assist in asynchronously generating the corresponding flow point detection instructions according to the flow point detection recommendation sequence; The computer control subsystem is also used to, after asynchronously regenerating the corresponding flow point detection instructions according to the recommended flow point detection order, obtain the error value between the first water volume and the second water volume corresponding to the corresponding flow point after each flow point detection is completed, supplement it to the input flow point detection recommended order model, and dynamically obtain the flow point detection recommended order to replace the previously obtained flow point detection recommended order.

6. The multi-position water meter calibration system according to claim 1, characterized in that, The computer control subsystem is also used to generate multiple image acquisition commands and send them to the image acquisition subsystem to acquire the image of the water meter to be calibrated after the flow regulation subsystem closes the flow meter valve corresponding to each flow point detection. At the same time, it generates multiple metering commands and sends them to the standard metering subsystem to obtain the water quality. It identifies and obtains the first water volume for each of the multiple images of the water meter to be calibrated and takes the average value. It calculates and obtains the second water volume based on the water quality measured multiple times and takes the average value.

7. A method for calibrating a multi-position water meter using the multi-position water meter calibration system described in any one of claims 1 to 6, characterized in that, include: The computer control subsystem receives the current model of the water meter to be tested and the flow detection requirements including multiple flow points from the user input, and generates a water meter clamping instruction accordingly, which is then transmitted to the water meter clamping subsystem containing a telescopic cylinder. After receiving the water meter clamping instruction, the water meter clamping subsystem uses the telescopic cylinder to control the cylinder to clamp the water meter to be tested, and after clamping the water meter to be tested, it generates a water meter clamping instruction and sends the instruction back to the computer control subsystem. After receiving the water meter clamping instruction and completing the instruction, the computer control subsystem generates a water flow and air release instruction and transmits it to the flow regulation subsystem, which includes the water supply pipeline and the water supply valve and intermediate rotor flow meter valve installed on the water supply pipeline, and the standard metering subsystem, which includes the weighing container valve. This allows the flow regulation subsystem and the standard metering subsystem to open the corresponding valves after receiving the water flow and air release instruction and close them after a preset time. The corresponding subsystem generates a water flow and air release completion instruction and sends it back to the computer control subsystem. After receiving the water flow and air release completion instructions from all subsystems, the computer control subsystem asynchronously generates corresponding flow point detection instructions to the flow regulation subsystem based on the model of the water meter to be tested and the flow detection requirements involving multiple flow points. This causes the flow regulation subsystem, which contains multiple flow meters with different ranges and each flow meter has a flow regulating valve, to open the flow meter valve corresponding to the flow point. Upon monitoring that the flow regulation subsystem, under the corresponding flow point detection instruction conditions, has reached the preset target water volume of the flow point, a flow meter valve closing instruction is generated and sent to the flow regulation subsystem to close the corresponding flow meter valve. The computer control subsystem, upon detecting the closure of the flow meter valve corresponding to each flow point by the flow regulation subsystem, generates an image acquisition command and sends it to the image acquisition subsystem to acquire the image of the water meter to be calibrated. Simultaneously, it generates a metering command and sends it to the standard metering subsystem to obtain the water quality. Based on the image of the water meter to be calibrated, it identifies the first water volume and calculates the second water volume based on the water quality. The computer control subsystem compares the error values ​​of the first and second water volumes corresponding to each flow point with the preset calibration error for each flow point to obtain the calibration result for the current flow point. After completing the calibration of all flow points, it generates a water meter release command and sends it to the water meter clamping subsystem. Upon receiving the release command, the clamping subsystem uses a telescopic cylinder to release the water meter to be calibrated. It then analyzes and obtains the calibration results of all flow points and generates a calibration report for the water meter to be calibrated.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform the method of claim 7.

9. A computer device, characterized in that, The computer device includes a memory, a processor, and a program stored in and executable on the memory, the program being executed by the processor to perform the steps of the method as described in claim 7.

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