Flow measuring and checking method and system for fluid conveying pipeline system

Abstract

The invention relates to the technical field of flow measurement, in particular to a flow measurement and checking method and system for a fluid conveying pipeline system. The method comprises the following steps: firstly, starting a flow measuring device and controlling a switching valve to enable to-be-measured fluid to enter a standard volume cavity; when fluid passes through the water inlet pipe indicating switch, the system obtains a timing starting signal and starts timing; when the container is filled with fluid and the water outlet pipe indication switch is triggered, the system obtains a timing termination signal; calculating an actual flow value according to the volume value and the full time; the drifting problem of a traditional flow meter is avoided, and the device can be used as a checking device of the flow meter; meanwhile, the system records the initial emptying time during calibration as a reference value, compares the actual emptying time after each measurement, and calculates an emptying deviation value; when the deviation exceeds a preset threshold value, a recalibration prompt is automatically triggered, so that the purposes of finding potential problems in time and ensuring the measurement precision are achieved; according to the preventive maintenance scheme, the equipment maintenance cost is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of flow measurement, and in particular to a flow measurement and calibration method and system for a fluid delivery pipeline system. Background Art

[0002] In the wastewater treatment industry, accurate flow measurement is crucial for process control and environmental compliance. Accurate flow measurement data is fundamental to the proper operation of wastewater treatment systems. It not only impacts treatment efficiency and operating costs, but also directly impacts the plant's compliance with discharge standards and environmental performance assessments.

[0003] Currently, electromagnetic flowmeters are primarily used in wastewater treatment to measure flow. These flowmeters utilize Faraday's law of electromagnetic induction to determine flow rate by measuring the induced electromotive force generated by a conductive liquid flowing in a magnetic field. Ultrasonic flowmeters are also used to calculate flow velocity by measuring the propagation time difference of ultrasonic waves in the fluid.

[0004] However, electromagnetic flowmeters are susceptible to scaling and electrode corrosion from impurities in sewage and require frequent maintenance. Ultrasonic flowmeters are greatly affected by pipe material and fluid gas content, and errors are significant at low flow rates. Both methods lack an effective online calibration mechanism and are unable to detect performance degradation in a timely manner. This situation needs further improvement. Summary of the Invention

[0005] In order to solve the problem that existing flow measurement methods are susceptible to scaling corrosion and unstable measurement accuracy, the present application provides a flow measurement and calibration method and system for a fluid delivery pipeline system, which adopts the following technical solutions: In a first aspect, the present application provides a flow rate measurement and calibration method for a fluid delivery pipeline system, comprising the following steps: Start the flow measurement device, control the switching valve to allow the fluid to be measured to enter the standard volume cavity, trigger the water flow indicator switch of the water inlet pipe, and obtain the timing start signal; The timing is started based on the timing start signal, and when the fluid to be measured fills the standard volume cavity, the water flow indicator switch of the water outlet pipe is triggered to obtain a timing end signal; Calculating the fluid filling time according to the timing start signal and the timing end signal; An actual flow rate value is determined based on the volume value of the standard volume cavity and the fluid filling time.

[0006] By adopting the above technical solution, since the existing flow meters in the sewage treatment field are easily affected by scaling and corrosion, such as electromagnetic flow meters that require frequent electrode cleaning, and ultrasonic flow meters with significant errors at low flow rates, and both lack an effective online calibration mechanism, it is difficult to ensure measurement accuracy; the present application first starts the flow measuring device and controls the switching valve to allow the fluid to be measured to enter the standard volume cavity; when the fluid passes through the water inlet pipe indicator switch, the system obtains a timing start signal and starts timing; when the fluid fills the container and triggers the water outlet pipe indicator switch, the system obtains a timing end signal; the actual flow value is calculated based on the volume value and the filling time; the standard volume cavity is used as a reference, and the flow rate is determined by accurately measuring the filling time of a fixed volume, avoiding the drift problem existing in traditional flow meters; the water flow indicator switch is used to realize automatic timing, thereby improving measurement accuracy and repeatability; the measurement process is fully automated, and the operation is simple and reliable; at the same time, it can be used as a calibration device for the flow meter to promptly detect and correct measurement errors to ensure the long-term accuracy of flow measurement.

[0007] Optionally, the standard volume cavity is provided with a venting pipe, and the method further comprises the following steps: When calibrating the standard volume cavity, the fluid to be measured is emptied through the vent pipe to obtain an initial venting time; After each measurement, the fluid to be measured is emptied through the vent pipe to obtain the actual venting time; Calculating a venting deviation value according to the initial venting time and the actual venting time; Based on the venting deviation value, it is determined whether to trigger a standard volume cavity recalibration prompt.

[0008] By adopting the above technical solution, since the traditional standard volume cavity lacks an effective scaling monitoring mechanism, problems can only be discovered through regular manual inspections or waiting for obvious deviations in the measurement results. This passive maintenance method is inefficient. The present application first records the initial venting time required for the vent pipe to empty the fluid to be measured as a benchmark value when calibrating the volume cavity. After each subsequent measurement is completed, the system will empty the fluid to be measured in the cavity through the vent pipe and record the actual venting time. By comparing the actual venting time with the initial venting time, the venting deviation value is calculated. When the venting deviation value exceeds the preset threshold, the system will automatically trigger a recalibration prompt. Potential problems can be discovered in advance, maintenance costs are effectively reduced, and the long-term stability of measurement accuracy is ensured.

[0009] Optionally, a guide groove is provided in the standard volume cavity.

[0010] By adopting the above technical solution, since the traditional standard volume cavity adopts a direct injection method, the fluid impact force is large and the turbulence is serious, which not only easily causes measurement errors, but also aggravates the scouring and scaling of the inner wall of the cavity; for example, when the standard volume cavity of a certain sewage treatment plant is measured at high flow, the water flow directly impacts the bottom of the cavity, generating a large number of bubbles and eddies, resulting in inaccurate water level detection and affecting the reliability of the measurement results; the present application sets a guide groove in the standard volume cavity; when the fluid enters the cavity, it is first received by the guide groove, and then slowly falls along the spiral flow channel to form a stable laminar flow state; it not only reduces the impact force of the fluid, but also enables the fluid to flow evenly along the inner wall of the cavity, avoiding the generation of bubbles and eddies.

[0011] Optionally, the vent pipe is connected to a siphon-breaking pipe, and the method further comprises the following steps: Obtain the outlet pipe water flow indication switch signal receiving node and synchronously send out the drain signal; In response to the emptying start signal, the fluid to be tested is emptied through the emptying pipe, and at the same time, the connection state between the siphon breaking pipe and the water inlet pipe is switched to empty the water in the water flow indication switch pipe section of the water inlet pipe.

[0012] By adopting the above technical solution, since the traditional gravity natural emptying method cannot completely eliminate the water in the water flow indicator switch section of the water inlet pipe, the residual water will affect the triggering timing and timing accuracy of the next measurement; the present application solves the above problem by setting a siphon breaking tube on the emptying pipe and utilizing the siphon breaking principle; when the system detects the emptying start signal sent by the water flow indicator switch of the outlet pipe, the fluid to be measured in the standard volume cavity is first emptied through the emptying pipe, and at the same time the control system switches the connection state between the siphon breaking tube and the water inlet pipe; at this time, the siphon breaking tube will produce a negative pressure effect, completely sucking out and emptying the water in the water flow indicator switch section of the water inlet pipe, ensuring that there is no residual water in the pipe section; it solves the problem of residual water affecting the measurement accuracy under the traditional gravity emptying method, ensures the consistency of the starting conditions of each measurement, and improves the reliability of the flow measurement results.

[0013] Optionally, the method further includes the following steps: Storing the actual emptying time to form emptying duration history data; Calculate the trend of short selling duration changes based on the historical data of short selling duration; When the change trend of the venting time shows a downward trend and exceeds the preset lower limit, a standard volume chamber scaling warning is triggered; When the venting deviation value shows an upward trend and exceeds a preset upper limit, an error warning of the flow measuring device itself is triggered; Early warning information is generated based on the fouling early warning and the error early warning.

[0014] By adopting the above technical solution, since traditional flow measurement systems lack a systematic performance degradation early warning mechanism, problems are often not discovered until obvious deviations appear in the measurement results, which not only affects the measurement accuracy but may also lead to erroneous process control decisions. The present application records and stores the actual venting time after each measurement to establish a historical database of venting time. Based on these historical data, the system continuously calculates the changing trend of the venting time. When it is found that the changing trend of the venting time is downward and exceeds the preset lower limit, the standard volume cavity fouling early warning is triggered. At the same time, the system also monitors the venting deviation value and when it shows an upward trend and exceeds the preset upper limit, the flow measurement device itself error early warning is triggered. Finally, the system generates early warning prompt information based on these two types of early warning information and promptly notifies the operation and maintenance personnel. By real-time monitoring of the changing trends of the venting time and measurement deviation, early warning of system performance degradation is achieved, and maintenance work is transformed from passive response to active prevention, effectively improving the reliability and maintenance efficiency of the system.

[0015] Optionally, the method further includes the following steps: Record the average flow value obtained from each measurement; Storing the average flow value in chronological order to form historical flow data; generating a flow change trend curve according to the historical flow data; A measurement report is generated based on the historical flow data.

[0016] By employing this technical solution, the system records the average flow rate values obtained from each measurement, calculated based on the standard chamber volume and fill time. This measurement data is then stored chronologically to form a historical flow database for the system's operation. Based on this accumulated historical data, the system automatically generates flow rate trend curves, visually displaying long-term flow rate fluctuations. The system also automatically generates measurement reports based on historical flow data, facilitating data analysis and decision-making for management personnel.

[0017] In a second aspect, the present application provides a flow measurement and calibration system for a fluid delivery pipeline system, comprising: Standard volume cavity, used to contain the fluid to be tested; A switching valve, used for controlling the fluid to be measured to enter the standard volume cavity; The water flow indicator switch of the water inlet pipe is set on the water inlet pipe and is used to detect the entry of the fluid to be tested and trigger the timing start signal; The water flow indicator switch of the water outlet pipe is set on the water outlet pipe to detect whether the water to be tested is full and trigger the timing end signal; A controller is connected to the switching valve, the water flow indicator switch of the water inlet pipe, and the water flow indicator switch of the water outlet pipe, and is used to perform the following steps: Controlling the switching valve to allow the fluid to be measured to enter the standard volume cavity; Calculating the fluid filling time based on the timing start signal and the timing end signal; The actual flow rate value is calculated according to the volume value of the standard volume cavity and the fluid filling time.

[0018] Optionally, the system further includes: A vent pipe, provided on the standard volume cavity, for draining the fluid to be tested; A drain pipe water flow indicator switch is provided on the drain pipe and is used to detect the draining state of the fluid to be tested; The controller is further configured to perform the following steps: When calibrating the standard volume cavity, obtaining the initial venting time of the vent pipe to evacuate the fluid to be tested; After each measurement, the actual draining time of the drain pipe to drain the fluid to be measured is obtained; Calculating a venting deviation value according to the initial venting time and the actual venting time; Based on the emptying deviation value, it is determined whether to trigger a prompt for recalibration of the standard volume cavity.

[0019] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the above-mentioned flow measurement and calibration method for a fluid delivery pipeline system are implemented.

[0020] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-mentioned flow measurement and calibration method for a fluid delivery pipeline system.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This application first activates the flow measurement device and controls the switching valve to allow the fluid to be measured to enter the standard volume chamber. When the fluid passes the water inlet pipe indicator switch, the system receives a timing start signal and begins timing. When the fluid fills the container and triggers the water outlet pipe indicator switch, the system receives a timing end signal. The actual flow value is calculated based on the volume value and the filling time. Using the standard volume chamber as a reference, the flow rate is determined by accurately measuring the filling time of a fixed volume, avoiding the drift problem of traditional flow meters. The water flow indicator switch is used to achieve automatic timing, improving measurement accuracy and repeatability. The measurement process is fully automated, simple and reliable to operate. It can also serve as a calibration device for the flow meter to promptly detect and correct measurement errors, ensuring the long-term accuracy of flow measurement. 2. This application first records the initial drain time required for the vent tube to empty the fluid to be measured as a baseline value when calibrating the volume chamber. After each subsequent measurement, the system drains the fluid to be measured from the chamber through the vent tube and records the actual drain time. By comparing the actual drain time with the initial drain time, the drain deviation value is calculated. When the drain deviation value exceeds a preset threshold, the system automatically triggers a recalibration prompt. This can detect potential problems in advance, effectively reducing maintenance costs and ensuring the long-term stability of measurement accuracy. 3. The present application solves the above-mentioned problem by arranging a siphon-breaking tube on the vent tube and utilizing the siphon-breaking principle; when the system detects the vent start signal issued by the water flow indicator switch of the outlet pipe, the fluid to be measured in the standard volume cavity is first emptied through the vent tube, and at the same time the control system switches the connection state between the siphon-breaking tube and the water inlet pipe; at this time, the siphon-breaking tube will produce a negative pressure effect, completely sucking out and emptying the water in the water flow indicator switch pipe section of the water inlet pipe, ensuring that there is no residual water in the pipe section; this solves the problem of residual water affecting the measurement accuracy under the traditional gravity venting method, ensures the consistency of the starting conditions of each measurement, and improves the reliability of the flow measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of a method for measuring and calibrating flow in a fluid delivery pipeline system according to an embodiment of the present application; Figure 2 This is a schematic structural diagram of a flow measurement device in an embodiment of the present application; Figure 3 2 is a flow chart of recalibrating a standard volume chamber based on an emptying deviation value in an embodiment of the present application; Figure 4 This is a schematic diagram of the process of draining stored water through a broken siphon in an embodiment of the present application; Figure 5 This is a flow chart of generating a measurement report in an embodiment of the present application; Figure 6 This is a flow chart of generating early warning information in an embodiment of the present application; Figure 7 This is a module schematic diagram of a flow measurement and calibration system for a fluid delivery pipeline system according to an embodiment of the present application; Figure 8 It is a diagram of the internal structure of the electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The terms used in the following examples of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "said," "above," "the," and "this" are intended to include plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in this application refers to any or all possible combinations comprising one or more of the listed items.

[0024] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0025] The embodiments of the present application are described in further detail below with reference to the accompanying drawings.

[0026] In the first aspect, the present application provides a flow measurement and calibration method for a fluid delivery pipeline system, referring to Figure 1 , including the following steps: S110 , start the flow measurement device, control the switching valve to allow the fluid to be measured to enter the standard volume cavity, trigger the water flow indicator switch of the water inlet pipe, and obtain a timing start signal.

[0027] In this embodiment, Figure 2 As shown, the flow measurement device includes a standard volume chamber, an inlet pipe, an outlet pipe, and corresponding flow indicator switches. A switching valve is installed on the inlet pipe to control whether the measured fluid enters the standard volume chamber. The inlet pipe flow indicator switch is installed near the inlet of the standard volume chamber to detect the flow status of the fluid.

[0028] Specifically, at the start of a measurement, the controller sends an opening signal to the switching valve, directing the fluid under test from the inlet pipe into the standard volume chamber. When the fluid passes through the inlet pipe's flow indicator switch, the switch senses the fluid flow and generates an electrical signal, which the system uses as the starting point for timing.

[0029] S120 , starting timing based on the timing start signal, and when the fluid to be measured fills the standard volume cavity, triggering the water flow indicator switch of the water outlet pipe to obtain a timing end signal.

[0030] In this embodiment, a water flow indicator switch of the water outlet pipe is provided on the top of the standard volume cavity to detect whether the container is full.

[0031] Specifically, the fluid to be measured enters the standard volume chamber through the main inlet pipe and then flows upward along the internal structure. When the liquid level reaches the top, excess fluid overflows from the outlet branch pipe, triggering the outlet pipe's water flow indicator switch. The system then confirms that the standard volume chamber has been filled to the specified capacity and generates a timer termination signal. Throughout the filling process, the rationally designed internal structure ensures a smooth rise of the fluid, preventing bubbles and turbulence.

[0032] S130: Calculate the fluid filling time according to the timing start signal and the timing end signal.

[0033] In this embodiment, the fluid filling time refers to the time interval from when the water flow indicator switch of the water inlet pipe is triggered to when the water flow indicator switch of the water outlet pipe is triggered.

[0034] Specifically, the controller uses a timer to record the triggering time of the two water flow indicator switches. The fluid filling time T is equal to the water outlet switch triggering timestamp minus the water inlet switch triggering timestamp, and the unit is converted to minutes.

[0035] S140: Determine an actual flow rate value based on the volume value of the standard volume cavity and the fluid filling time.

[0036] In this embodiment, Figure 2 The standard volume cavity shown is calibrated with scale lines to indicate the standard volume value V. The actual flow value Q refers to the volume of fluid passing through the pipe per unit time.

[0037] Specifically, the system divides the standard volume value V (unit: cubic meters) by the filling time T (unit: minutes) measured in step S130 to obtain the actual flow rate value Q = V / T (unit: cubic meters / minute). To account for temperature fluctuations in actual applications, the system installs a temperature sensor on the volume chamber. When the temperature deviates from the calibration temperature by more than ±5°C, a temperature correction factor K is obtained through a table lookup and correction is applied. The corrected actual flow rate value Q' = Q × K.

[0038] Furthermore, the system compares the actual flow value with the flow meter measurement value in the pipeline system and calculates the deviation rate.

[0039] In this embodiment, the flowmeter installed on the pipeline being tested is connected to the standard volume chamber via a calibration water inlet pipe. The deviation rate is used to evaluate the accuracy of the flowmeter, and the system sets the allowable deviation range to be ±5%.

[0040] Specifically, the system reads the cumulative flow rate values of the flowmeter under test during the measurement cycle in real time and calculates the average flow rate value Qm. This average Qm is compared with the actual flow rate value Q' measured using the standard volumetric method, and the deviation rate E is calculated: E = (Qm - Q') / Q' × 100%. If the absolute value of the deviation rate exceeds the allowable tolerance, the system marks the measurement result in the database and notifies the operator via the industrial computer interface. After each measurement, the system drains the fluid under test through the vent pipe and prepares for the next measurement.

[0041] During each measurement, the system simultaneously collects the flowmeter's real-time flow rate, inlet and outlet pipe temperature and pressure data, fluid pulsation characteristics, and mechanical status parameters. Fluid pulsation characteristics are obtained by capturing pressure fluctuation signals from a pressure sensor on the inlet pipe. Improper flowmeter installation (e.g., insufficient straight pipe length) can lead to abnormal pressure fluctuations. Mechanical status parameters, including bearing vibration frequency and drive circuit current, are obtained by a vibration sensor and current detection circuit mounted on the flowmeter housing. The system is also equipped with an online density meter and conductivity sensor to monitor wastewater quality. Using a pre-established feature rule library, the system automatically identifies fault types. Faults are identified as installation issues when the deviation rate differs by more than 3% across different range points and the pressure fluctuation amplitude exceeds twice the preset normal value. A recent, sustained increase in the deviation rate at a rate exceeding 0.5% per month, combined with a bearing vibration amplitude exceeding twice the rated value, indicates flowmeter aging. Fluctuations in the deviation rate exceeding 5% within a short period of time and sudden changes in density or conductivity outside preset ranges (e.g., sudden changes in suspended solids content in wastewater or intermittent industrial wastewater discharge) indicate a media abnormality.

[0042] Once the system identifies a fault type, it will display the fault type and recommended action plan on the industrial computer interface. Depending on the on-site situation, staff can choose to address the problem immediately or initiate temporary corrective measures. If they choose to initiate temporary corrective measures, they must confirm the corrective measures on the industrial computer interface and set the validity period of the corrective measures. For installation issues, the system performs three calibration measurements at each of the five range points: 0.1x, 0.3x, 0.5x, 0.8x, and 1.0x. The average deviation value at each range point is calculated to generate a calibration curve. The entire range is then divided into five segments, each with a 0.2x range interval. Within each segment, a correction factor is calculated using linear interpolation based on the deviation values of two adjacent calibration points. The correction factor is then stored in a lookup table for real-time correction. For flowmeter aging issues, the system performs regular monthly calibration measurements at the 0.5x range point, recording the deviation and vibration amplitude at that point. The deviation value for the next month is linearly extrapolated based on the rate of change of the deviation over the past three months. Calibration is scheduled in advance if the predicted deviation exceeds the allowable range. To address measurement deviations caused by fluctuations in influent water quality (such as sudden changes in medium density and conductivity caused by changes in suspended solids content in sewage or intermittent discharge of industrial wastewater), the system monitors water quality parameters in real time using an online density meter and conductivity sensor. When water quality parameters are detected to be outside the calibrated operating range, dynamic corrections are made based on a pre-established table of water quality parameter-correction factors. The system organizes and stores all correction data by measurement number, date, type, and other information, with a three-month validity period. After the expiration date, a recalibration confirmation prompt is prompted.

[0043] In one embodiment, the standard volume chamber is provided with a vent tube, referring to Figure 3 , the method further comprises the steps of: S310: When calibrating the standard volume cavity, the fluid to be measured is emptied through the vent pipe to obtain an initial venting time.

[0044] In this embodiment, the vent pipe refers to the drainage pipe installed at the bottom of the standard volume chamber, including the vent valve and vent pipe. The initial vent time is the benchmark time required to completely drain the fluid from the standard volume chamber when the chamber is clean and free of scale. The calibration process must be performed in a constant temperature environment to eliminate the impact of temperature on fluid viscosity.

[0045] Specifically, a 20°C standard water sample is injected into the container until the outlet pipe's water flow indicator generates a signal. The system then fully opens the vent valve to the preset opening and simultaneously starts a timer. During the venting process, a bottom level sensor monitors the liquid level in real time. When the device has drained the liquid and the vent pipe's water flow indicator switches show a last no-signal moment for 10 seconds, the system records this last no-signal moment as the venting termination time.

[0046] S320. After each measurement, the fluid to be measured is emptied through the vent pipe to obtain an actual venting time.

[0047] In this embodiment, the actual venting time refers to the actual time required to empty the measured fluid from the standard volume chamber after the daily measurement is completed. The system uses the same venting process parameters as during calibration, including the same valve opening and liquid level detection method, to ensure comparable measurements.

[0048] Specifically, after each flow measurement, the system automatically executes the venting procedure. It first checks whether the liquid level in the container is at the reference mark. If it is below that mark, the actual level is recorded for subsequent corrections. The system then controls the vent valve to open, and the bottom level sensor begins recording the venting process.

[0049] S330: Calculate the emptying deviation value according to the initial emptying time and the actual emptying time.

[0050] In this embodiment, the venting deviation value refers to the difference between the actual venting time and the initial venting time, and is used to characterize the scaling of the inner wall of the standard volume chamber or the blockage of the pipeline.

[0051] Specifically, the system uses a mathematical model to calculate the venting deviation. First, the actual venting time is temperature-corrected to obtain the corrected venting time Tr under standard conditions. The relative deviation is then calculated using the formula: venting deviation D = (Tr - T0) / T0 × 100%. The system maintains a database of venting deviation values over a sliding time window and uses statistical analysis to identify abnormal trends.

[0052] Furthermore, the system provides a fluid characteristic parameter configuration interface for setting and managing correction parameters for different fluids. Regarding basic fluid information configuration, the system establishes a fluid information database, recording the fluid name, type (e.g., water, oil, chemical liquid), baseline viscosity value under standard conditions, density range, and operating temperature range. To establish the temperature-viscosity relationship curve, the system uses a linear fitting method, measuring viscosity values at different temperatures and then generating the temperature-viscosity relationship curve through linear fitting. The vent time correction formula is: Tr = Tm × (μm / μ0), where Tr is the corrected vent time, Tm is the measured vent time, μm is the viscosity at the measured temperature, and μ0 is the viscosity at the standard temperature. The system regularly (quarterly) verifies the accuracy of the correction factor using standard fluids. By recording the actual temperature of each measurement and the corresponding correction effect, the system prompts the administrator to recalibrate the correction parameter if the corrected vent deviation value shows systematic deviation, thus ensuring the accuracy of the fluid temperature correction.

[0053] S340: Based on the venting deviation value, determine whether to trigger a prompt for recalibration of the standard volume cavity.

[0054] In this embodiment, the standard volume cavity recalibration prompt refers to a prompt message in which the system determines whether the container needs to be cleaned or recalibrated based on the emptying deviation value analysis result.

[0055] Specifically, the system uses a decision table to determine whether to trigger a recalibration prompt. When the venting deviation value is between 0-5%, the system simply records the data without triggering a prompt. When the deviation value reaches 5-15%, the system issues a mild warning and recommends cleaning during the next scheduled maintenance. When the deviation value exceeds 15%, the system triggers a recalibration prompt, requiring immediate container inspection and cleaning.

[0056] In one embodiment, referring to Figure 2 The standard volume chamber is equipped with an inclined flow channel, which spirals downward along the inner wall of the chamber. When fluid enters the chamber, it is first received by the flow channel and then slowly falls along the spiral channel, forming a stable laminar flow state. This not only reduces the impact force of the fluid, but also allows the fluid to flow evenly along the inner wall of the chamber, avoiding the generation of bubbles and eddies.

[0057] In one embodiment, referring to Figure 4 The vent pipe is connected to a siphon-breaking pipe, and the method further comprises the following steps: S410: Obtain the water flow indication switch signal of the outlet pipe to open the node, and simultaneously start the emptying signal.

[0058] In this embodiment, the venting signal refers to a trigger signal sent by the water flow indicator switch of the outlet pipe when the standard volume cavity completes a flow measurement and the system needs to be vented to prepare for the next measurement.

[0059] S420. In response to the drain start signal, the fluid to be tested is drained through the drain pipe, and at the same time, the connection state between the siphon breaking pipe and the water inlet pipe is switched to drain the water in the water flow indicator switch pipe section of the water inlet pipe.

[0060] In this embodiment, the siphon-breaking pipe is a special pipe structure that works on the siphon principle. By forming a negative pressure area at a high place, it realizes the automatic emptying of water accumulated at a low place.

[0061] Specifically, the system establishes a venting control timing table, which specifies the sequence and time intervals for each actuator during the venting process. Upon receiving the venting start signal, the venting valve is first opened, allowing gravity to drain the fluid in the volume chamber. The switching valve is then controlled to switch to the siphon break position, establishing connectivity between the siphon break and the water inlet pipe. The siphon break clears any remaining water from the pipe section.

[0062] In one embodiment, referring to Figure 5 , the method further comprises the steps of: S510: Record the average flow rate value obtained from each measurement.

[0063] In this embodiment, the average flow value refers to a fluid flow value calculated using the measured time parameters during a single measurement process, reflecting the average flow rate of the fluid during the measurement period.

[0064] Specifically, the system establishes a flow calculation parameter table. After each measurement is completed, the measured time value is substituted into the preset flow calculation formula to obtain the average flow value.

[0065] S520: Store the average flow value in chronological order to form historical flow data.

[0066] In this embodiment, historical flow data refers to all measurement results recorded by the system in chronological order.

[0067] S530: Generate a flow change trend curve based on historical flow data.

[0068] In this embodiment, the flow change trend curve is a form of data visualization, where the horizontal axis represents time and the vertical axis represents flow value, and the curve intuitively shows the change pattern of flow over time.

[0069] S540: Generate a measurement report based on the historical traffic data.

[0070] In this embodiment, the measurement report is a statistical analysis result of historical traffic data, including statistical indicators such as daily average traffic, weekly average traffic, and monthly average traffic, as well as information such as traffic fluctuation range and abnormal point statistics.

[0071] In one embodiment, referring to Figure 6 , the method further comprises the steps of: S610: Storing the actual emptying time to form emptying duration history data.

[0072] In this embodiment, the actual drain time refers to the duration from the start of draining to the end of draining, including the actual time the liquid is discharged and the time the residual liquid in the pipeline drips. Historical data is stored in a time series format and includes related information such as draining date, ambient temperature, and liquid type.

[0073] S620. Calculate the trend of the shorting duration change based on the shorting duration historical data.

[0074] In this embodiment, the trend of the venting time reflects the change in equipment performance over time. The system analyzes the growth rate and pattern of the venting time by comparing the venting time under the same conditions.

[0075] S630: When the venting time shows a downward trend and exceeds a preset lower limit, a standard volume chamber scaling warning is triggered.

[0076] In this embodiment, the emptying time refers to the duration from the start of emptying to the completion of emptying. The preset lower limit is based on the emptying time statistics when the equipment is operating normally.

[0077] S640: When the venting deviation value shows an upward trend and exceeds a preset upper limit, the flow measuring device's own error warning is triggered.

[0078] The venting deviation value refers to the difference between the actual venting time and the initial venting time. The preset upper limit is the maximum allowable lower limit of the difference set in advance.

[0079] S650: Generate warning information based on the scaling warning and the error warning.

[0080] In this embodiment, the warning prompt information includes warning type, warning level, triggering conditions, recommended measures, etc. The system adopts different prompting methods according to the urgency of the warning to ensure timely and effective transmission of information.

[0081] Specifically, the system has designed a hierarchical warning information push mechanism. For general warnings, the system displays prompt information on the industrial computer interface; for emergency warnings, the system simultaneously sends audible and visual alarms and mobile phone text message notifications.

[0082] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0083] In the second aspect, the present application provides a flow measurement and calibration system for a fluid conveying pipeline system. The flow measurement and calibration system for a fluid conveying pipeline system of the present application is described below in combination with the above-mentioned flow measurement and calibration method for a fluid conveying pipeline system.

[0084] Reference Figure 7 , a flow measurement and calibration system for a fluid delivery pipeline system, comprising: Standard volume cavity, used to contain the fluid to be tested; A switching valve is used to control the flow of the fluid to be measured into the standard volume cavity; The water flow indicator switch of the water inlet pipe is set on the water inlet pipe and is used to detect the entry of the fluid to be tested and trigger the timing start signal; The water flow indicator switch of the water outlet pipe is set on the water outlet pipe to detect whether the water to be tested is full and trigger the timing end signal; The controller is connected to the switching valve, the water flow indicator switch of the water inlet pipe, and the water flow indicator switch of the water outlet pipe. The controller is used to perform the following steps: Control the switching valve to allow the fluid to be measured to enter the standard volume cavity; Calculating the fluid filling time based on the timing start signal and the timing end signal; Calculate the actual flow rate value based on the volume value of the standard volume cavity and the fluid filling time; The actual flow value is compared with the flow meter measurement value in the pipeline system to obtain the deviation rate.

[0085] In one embodiment, the system further comprises: The vent tube is provided on the standard volume cavity and is used to drain the fluid to be tested; The drain pipe water flow indicator switch is set on the drain pipe and is used to detect the draining status of the fluid to be tested; The controller is also used to perform the following steps: When calibrating a standard volume cavity, obtain the initial venting time of the vent pipe to evacuate the fluid to be tested; After each measurement, the actual draining time of the drain pipe to drain the fluid to be measured is obtained; Calculate the emptying deviation value based on the initial emptying time and the actual emptying time; Determine whether to trigger the standard volume chamber recalibration prompt based on the emptying deviation value.

[0086] In one embodiment, the present application provides an electronic device, which may be a server, and its internal structure diagram may be as follows: Figure 8 As shown. The electronic device includes a processor, a memory and a network interface connected via a system bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the electronic device is used to store data. The network interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a flow measurement and calibration method for a fluid delivery pipeline system is implemented.

[0087] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0088] In one embodiment, an electronic device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0089] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The above-described computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described method embodiments. Any reference to memory, storage, database, or other media used in the embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0090] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flow measurement and calibration method for a fluid delivery pipeline system, characterized in that: The steps include: Start the flow measurement device, control the switching valve to allow the fluid to be measured to enter the standard volume cavity, trigger the water flow indicator switch of the water inlet pipe, and obtain the timing start signal; The timing is started based on the timing start signal, and when the fluid to be measured fills the standard volume cavity, the water flow indicator switch of the water outlet pipe is triggered to obtain a timing end signal; Calculating the fluid filling time according to the timing start signal and the timing end signal; An actual flow rate value is determined based on the volume value of the standard volume cavity and the fluid filling time.

2. The flow measurement and calibration method for a fluid delivery pipeline system according to claim 1, characterized in that: The standard volume cavity is provided with a venting pipe, and the method further comprises the following steps: When calibrating the standard volume cavity, the fluid to be measured is emptied through the vent pipe to obtain an initial venting time; After each measurement, the fluid to be measured is emptied through the vent pipe to obtain the actual venting time; Calculating a venting deviation value according to the initial venting time and the actual venting time; Based on the venting deviation value, it is determined whether to trigger a standard volume cavity recalibration prompt.

3. The flow measurement and calibration method for a fluid delivery pipeline system according to claim 2, characterized in that: A guide groove is provided in the standard volume cavity.

4. The flow measurement and calibration method for a fluid delivery pipeline system according to claim 2, characterized in that: The vent pipe is connected to a siphon-breaking pipe, and the method further comprises the following steps: Obtain the water flow indication switch signal of the outlet pipe to open the node and simultaneously start the emptying signal; In response to the emptying start signal, the fluid to be tested is emptied through the emptying pipe, and at the same time, the connection state between the siphon breaking pipe and the water inlet pipe is switched to empty the water in the water flow indication switch pipe section of the water inlet pipe.

5. The flow rate measurement and calibration method for a fluid delivery pipeline system according to claim 2, characterized in that: The method further comprises the steps of: Storing the actual emptying time to form emptying duration history data; Calculate the trend of short selling duration changes based on the historical data of short selling duration; When the change trend of the venting time shows a downward trend and exceeds the preset lower limit, a standard volume chamber scaling warning is triggered; When the venting deviation value shows an upward trend and exceeds a preset upper limit, an error warning of the flow measuring device itself is triggered; Early warning information is generated based on the fouling early warning and the error early warning.

6. The flow rate measurement and calibration method for a fluid delivery pipeline system according to claim 1, characterized in that: The method further comprises the steps of: Record the average flow value obtained from each measurement; Storing the average flow value in chronological order to form historical flow data; generating a flow change trend curve according to the historical flow data; A measurement report is generated based on the historical flow data.

7. A flow measurement and calibration system for a fluid delivery pipeline system, characterized in that: include: Standard volume cavity, used to contain the fluid to be tested; A switching valve, used for controlling the fluid to be measured to enter the standard volume cavity; The water flow indicator switch of the water inlet pipe is set on the water inlet pipe and is used to detect the entry of the fluid to be tested and trigger the timing start signal; The water flow indicator switch of the water outlet pipe is set on the water outlet pipe to detect whether the water to be tested is full and trigger the timing end signal; A controller is connected to the switching valve, the water flow indicator switch of the water inlet pipe, and the water flow indicator switch of the water outlet pipe, and is used to perform the following steps: Controlling the switching valve to allow the fluid to be measured to enter the standard volume cavity; Calculating the fluid filling time based on the timing start signal and the timing end signal; The actual flow rate value is calculated according to the volume value of the standard volume cavity and the fluid filling time.

8. The flow measurement and calibration system for a fluid delivery pipeline system according to claim 7, characterized in that: The system also includes: A vent pipe, provided on the standard volume cavity, for draining the fluid to be tested; A drain pipe water flow indicator switch is provided on the drain pipe and is used to detect the draining state of the fluid to be tested; The controller is further configured to perform the following steps: When calibrating the standard volume cavity, obtaining the initial venting time of the vent pipe to evacuate the fluid to be tested; After each measurement, the actual draining time of the drain pipe to drain the fluid to be measured is obtained; Calculating a venting deviation value according to the initial venting time and the actual venting time; Based on the emptying deviation value, it is determined whether to trigger a prompt for recalibration of the standard volume cavity.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of flow measurement and calibration for a fluid transport pipeline system according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of flow measurement and calibration for a fluid transport pipeline system according to any one of claims 1 to 6 are implemented.

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