Air volume measuring method, air volume measuring device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides an air volume measurement method, an air volume measurement device, electronic equipment and a storage medium, and relates to the technical field of fluid mechanics measurement. The air volume measuring device comprises a flute-shaped pipe array, a transmitter and a plurality of magnetic attraction fastening modules. Wherein the flute-shaped tube array comprises a plurality of flute-shaped tubes; each flute-shaped pipe is magnetically connected to the pipe wall of the air pipe through a magnetic attraction fastening module; the flute-shaped pipes are arranged on the same cross section in the air pipe; each flute-shaped pipe is connected with a transmitter; each flute-shaped pipe is used for measuring the air speed of the air flow in the air pipe to obtain an air speed signal; and the transmitter is used for calculating the air volume according to the air speed signals measured by the flute-shaped pipes and the sectional area of the cross section. The embodiment of the invention can improve the efficiency of air volume measurement while ensuring the accuracy of air volume measurement.

Description

Technical Field

[0001] This application relates to the field of fluid dynamics measurement technology, and in particular to an air volume measurement method, air volume measurement device, electronic device and storage medium. Background Art

[0002] Airflow balance testing is a comprehensive test to verify the performance of a ventilation system. During this test, the airflow of the ventilation system needs to be measured and adjusted to ensure uniform airflow distribution throughout the system, meeting design requirements. In the ventilation systems of large buildings such as nuclear power plants and subway tunnels, the requirements for the accuracy and efficiency of airflow balance testing are particularly stringent.

[0003] However, current airflow measurement methods in airflow balance tests struggle to balance accuracy and efficiency. Specifically, a common method for measuring airflow within ducts is to use a Pitot tube (also known as an anemometer) to measure the air velocity within the ventilation system's ducts to calculate the airflow. However, currently, a single Pitot tube is often used to measure the air velocity, resulting in significant errors. Furthermore, current methods using multiple Pitot tubes require considerable time to install (e.g., weld) multiple Pitot tubes within the duct, further increasing the measurement time.

[0004] Therefore, improving the accuracy and efficiency of air volume measurement has become an urgent technical problem to be solved. Summary of the Invention

[0005] The main objective of this application is to provide an airflow measurement method, airflow measurement device, electronic device, and storage medium, aiming to improve the accuracy and efficiency of airflow measurement.

[0006] To achieve the above objectives, a first aspect of this application provides an airflow measuring device, the airflow measuring device comprising:

[0007] The system includes a flute array, a transmitter, and multiple magnetic fastening modules; wherein the flute array comprises multiple flute tubes.

[0008] Each of the aforementioned flute tubes is magnetically connected to the wall of the duct via the magnetic fastening module; multiple flute tubes are arranged on the same cross-section inside the duct; each of the aforementioned flute tubes is connected to the transmitter;

[0009] Each of the aforementioned flute tubes is used to measure the airflow speed inside the duct to obtain a wind speed signal; the transmitter is used to calculate the air volume based on the wind speed signals obtained from the multiple flute tubes and the cross-sectional area of ​​the cross section.

[0010] In some embodiments, each of the magnetic fastening modules includes a magnetic base and a fastener;

[0011] The duct wall is magnetic, and the duct wall has an outer wall;

[0012] The magnetic base is magnetically connected to the outer wall; the tube wall is provided with a first opening, the magnetic base is provided with a second opening, and the second opening and the first opening are aligned; the flute-shaped tube is sequentially inserted into the first opening and the second opening, and the flute-shaped tube is connected to the magnetic base through the fixing member.

[0013] In some embodiments, the cross-section of the duct is axisymmetric;

[0014] The plurality of first openings are symmetrically arranged on the pipe wall of the duct along the axis of symmetry of the cross section; the plurality of flute-shaped tubes are symmetrically arranged on the cross section along the axis of symmetry of the cross section.

[0015] In some embodiments, a magnetic suction head is provided at the end of the flute tube inside the duct;

[0016] The pipe wall has an inner wall;

[0017] The magnetic head at the end of the flute-shaped tube is magnetically connected to the inner wall of the duct.

[0018] To achieve the above objectives, a second aspect of this application provides an airflow measurement method, characterized in that it is applied to the airflow measurement device described in the first aspect, the method comprising:

[0019] The wind speed differential pressure signal of each of the plurality of flute tubes is acquired; wherein the flute tubes are used to measure the wind speed of the airflow in the target duct, and the plurality of flute tubes are arranged on the target cross section inside the duct;

[0020] Obtain the target fluid density of the airflow within the target duct;

[0021] The flow velocity is calculated based on the wind speed differential pressure signal and the target fluid density of each of the flute-shaped tubes to obtain the local wind speed corresponding to each of the flute-shaped tubes.

[0022] The average wind speed is obtained by fusing data from multiple local wind speeds.

[0023] The target air volume is obtained by calculating the flow rate based on the average wind speed and the cross-sectional area of ​​the target cross section.

[0024] In some embodiments, before acquiring the wind speed differential pressure signal for each of the plurality of flutes, the method further includes:

[0025] Multiple openings are provided on the wall of the target duct, and each of the flute-shaped tubes is inserted through one of the openings, so that the multiple flute-shaped tubes are located on the target cross-section;

[0026] The angle between the axial direction of each flute-shaped tube and the airflow direction in the target duct is measured to obtain the axial flow direction angle of each flute-shaped tube.

[0027] The angle deviation value of each flute tube is obtained by calculating the difference between the axial flow direction angle and the right angle of each flute tube.

[0028] If the angle deviation value does not fall within the preset angle deviation range, the angle of the flute tube is adjusted.

[0029] In some embodiments, obtaining the target fluid density of the airflow within the target duct includes:

[0030] The temperature of the target airflow is obtained by measuring the temperature of the airflow inside the target airflow using a temperature sensor deployed inside the target airflow duct.

[0031] The absolute pressure and molar mass of the airflow in the target duct are obtained, and the target fluid density is obtained by performing temperature compensation calculation based on the target airflow temperature, the absolute pressure, and the molar mass of the gas.

[0032] In some embodiments, the step of calculating the flow velocity based on the wind speed differential pressure signal and the target fluid density of each of the flute-shaped tubes to obtain the local wind speed corresponding to each of the flute-shaped tubes includes:

[0033] The wind speed differential pressure signal of each of the flute tubes is numerically converted to obtain the wind speed differential pressure value, and the original wind speed corresponding to each flute tube is obtained by square root calculation based on the ratio of the wind speed differential pressure value to the target fluid density.

[0034] The original wind speed corresponding to each of the aforementioned flute tubes is multiplied by a preset correction coefficient to obtain the local wind speed corresponding to each flute tube.

[0035] To achieve the above objectives, a third aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the airflow measurement method described in the second aspect.

[0036] To achieve the above objectives, a fourth aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the airflow measurement method described in the second aspect above.

[0037] The airflow measurement method, device, electronic equipment, and storage medium proposed in this application simultaneously measure the airflow velocity at different locations on the same cross-section inside a duct using multiple flute-shaped tubes in an array. This allows for more comprehensive and accurate measurement of the airflow velocity within the duct, even when the velocity distribution across the duct cross-section is uneven. It reduces local measurement errors caused by flow field distortion, resulting in a final airflow calculation that more closely approximates the true value. Furthermore, considering the time-consuming nature of traditional fixing methods such as welding for installing multiple flute-shaped tubes, this application avoids welding and instead uses magnetic fastening modules to magnetically connect the flute-shaped tubes to the duct wall. This allows for rapid installation and arrangement of the flute-shaped tubes through magnetic adsorption, significantly simplifying the installation process, avoiding the time-consuming welding process, and greatly reducing the deployment time of multiple flute-shaped tubes, thus improving the efficiency of airflow measurement. Then, a transmitter calculates the airflow based on the airflow velocity signals from the multiple flute-shaped tubes and the duct cross-sectional area, thereby improving both the accuracy and efficiency of airflow measurement. Attached Figure Description

[0038] Figure 1 This is a block diagram of the air volume measurement device provided in the embodiments of this application;

[0039] Figure 2 This is a schematic diagram of the air volume measuring device provided in the embodiments of this application;

[0040] Figure 3 This is a functional schematic diagram of the transmitter provided in the embodiments of this application;

[0041] Figure 4 This is a schematic diagram of the operation flow of the transmitter provided in the embodiments of this application;

[0042] Figure 5 This is a schematic diagram of the flow field distribution inside the duct provided in an embodiment of this application;

[0043] Figure 6 This is a schematic diagram of the dimensions and specifications of the flute-shaped tube provided in the embodiments of this application;

[0044] Figure 7 This is a flowchart of the air volume measurement method provided in the embodiments of this application;

[0045] Figure 8 This is a flowchart of an airflow measurement method provided in another embodiment of this application;

[0046] Figure 9 yes Figure 7 The flowchart for step 102 in the document;

[0047] Figure 10 yes Figure 7 The flowchart for step 103 in the text;

[0048] Figure 11 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application.

[0049] Reference numerals: 10 flute array; 20 transmitter; 30 magnetic fastening module; 11 flute. Detailed Implementation

[0050] 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.

[0051] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0053] First, let's analyze some of the terms used in this application:

[0054] Pitot Tube: Also known as an airspeed tube or wind speed tube. A pitot tube is a tubular device that measures the total pressure and static pressure of an airflow to determine its velocity. The principle of pitot tube velocity measurement is mainly based on measuring the total pressure and static pressure of the airflow and determining the wind speed based on Bernoulli's equation.

[0055] A Pitot tube is a fluid velocity measuring device developed based on the Pitot tube's velocity measurement principle. A Pitot tube typically consists of two hollow, thin tubes: an inner tube and an outer tube. The outer tube has several small holes around its perimeter, also called total pressure holes. The opening of the inner tube faces the direction of the flow. During measurement, the Pitot tube is inserted into the airflow being measured. The airflow impacts the opening of the inner tube, causing it to experience the total pressure of the airflow. Meanwhile, the openings of the small holes around the outer tube are perpendicular to the direction of the flow, so the outer tube experiences the static pressure of the airflow. Since the difference between total pressure and static pressure reflects the kinetic energy of the airflow, according to Bernoulli's equation, the velocity of the airflow can be calculated by measuring the difference between the total pressure and static pressure (i.e., dynamic pressure).

[0056] Hot-wire anemometer: This is a speed measuring instrument based on the principle of heat dissipation. It works by placing a thin, electrically heated metal wire (hot wire) in a fluid. The flow rate is converted into an electrical signal by utilizing the property that the airflow cools the hot wire, causing a change in its resistance. Specifically, the temperature of the hot wire in the fluid is higher than the fluid temperature, resulting in heat conduction, radiation, and especially convection heat transfer in its vicinity. These heat transfers intensify with increasing flow rate. The amount of heat dissipated by the hot wire in the fluid is related to the flow rate, and this heat dissipation causes a temperature change, which in turn causes a change in resistance, converting the wind speed into an electrical signal. The flow rate can then be determined based on the Joule effect.

[0057] The Reynolds number (Re) is a dimensionless parameter in fluid mechanics used to describe the characteristics of fluid flow. It measures the ratio of inertial forces to viscous forces in a fluid, thus describing the properties of fluid flow under different conditions.

[0058] Artificial Intelligence (AI) is a new technical science that studies and develops theories, methods, technologies, and application systems for simulating, extending, and expanding human intelligence. A branch of computer science, AI attempts to understand the essence of intelligence and produce intelligent machines that can react in a way similar to human intelligence. Research in this field includes robotics, speech recognition, image recognition, natural language processing, and expert systems. AI can be a simulation of the information processes of human consciousness and thought. It can also be the theory, methods, technologies, and application systems that use digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use that knowledge to obtain optimal results. Fundamental AI technologies generally include sensors, dedicated AI chips, cloud computing, distributed storage, big data processing technology, operating / interactive systems, and mechatronics. AI software technologies mainly include computer vision, robotics, biometrics, speech processing, natural language processing, and machine learning / deep learning. This application can acquire and process relevant data based on AI technology.

[0059] Airflow balance testing is a comprehensive test to verify the performance of a ventilation system, and it is also the most challenging test in the ventilation system field. The experiment involves a wide area, numerous pieces of equipment, and is time-consuming. Taking the ventilation system of a nuclear power plant as an example, the requirements for airflow balance testing are particularly stringent in nuclear power plants, and the test is time-consuming, especially the airflow measurement stage, which takes the longest. Therefore, it is urgent to improve the efficiency of airflow measurement to enhance the efficiency of the airflow balance test process. In the airflow measurement stage, common methods for measuring airflow within ducts include measuring the wind speed at the duct cross-section using an anemometer, and then calculating the airflow at that cross-section. Instrument probes used for measuring the duct cross-section include Pitot tubes and hot-wire anemometers. Currently, single-point Pitot tube measurement is commonly used, that is, using a single Pitot tube to measure the wind speed at the duct cross-section. The drawback of single-point Pitot tube measurement is that when the airflow velocity in the duct is asymmetrically distributed, or when turbulence is significant (e.g., Reynolds number greater than 4000), the measurement error is relatively large. To reduce airflow error and improve measurement accuracy, multi-point Pitot tube measurement can be used, which involves measuring the airflow velocity at the duct cross-section using multiple Pitot tubes. However, current multi-point Pitot tube measurement processes are time-consuming. Specifically, installing the Pitot tubes in the duct requires welding for fixation, and the time required to install multiple Pitot tubes increases linearly. Furthermore, repeated disassembly and reassembly of the Pitot tubes may be necessary, reducing the efficiency of airflow measurement. In summary, current airflow measurement methods struggle to balance accuracy and efficiency.

[0060] Based on this, this application proposes an airflow measurement method, an airflow measurement device, an electronic device, and a storage medium, which can improve the efficiency of airflow measurement while ensuring the accuracy of airflow measurement.

[0061] The air volume measurement method, air volume measurement device, electronic device and storage medium provided in the embodiments of this application are specifically described through the following embodiments. First, the air volume measurement device in the embodiments of this application is described.

[0062] Figure 1 This is an optional module block diagram of the air volume measuring device provided in the embodiments of this application. Figure 1 The air volume measurement device in the middle may include, but is not limited to:

[0063] The system includes a flute array 10, a transmitter 20, and multiple magnetic fastening modules 30; wherein the flute array 10 includes multiple flute tubes 11.

[0064] Each flute tube 11 is magnetically connected to the wall of the duct via a magnetic fastening module 30; multiple flute tubes 11 are arranged on the same cross-section inside the duct; each flute tube 11 is connected to a transmitter 20.

[0065] Each flute tube 11 is used to measure the airflow speed inside the duct and obtain the airflow speed signal; the transmitter 20 is used to calculate the air volume based on the airflow speed signals obtained from multiple flute tubes 11 and the cross-sectional area of ​​the cross section.

[0066] The beneficial effects of this application embodiment include, but are not limited to: Simultaneous measurement of wind speed at different locations on the same cross-section inside the duct via multiple flute-shaped tubes 11 in the flute array 10. This allows for more comprehensive and accurate measurement of wind speed within the duct even when the flow velocity distribution across the duct cross-section is uneven, reducing local measurement errors caused by flow field distortion and making the final airflow calculation result closer to the true value. Furthermore, considering the time-consuming nature of installing multiple flute-shaped tubes 11 using traditional fixing methods such as welding, instead of welding, the flute-shaped tubes 11 are magnetically connected to the duct wall via a magnetic fastening module 30. This allows for rapid installation and arrangement of the flute-shaped tubes 11 through magnetic adsorption, significantly simplifying the installation process, avoiding the installation time required for welding, and significantly reducing the deployment time of multiple flute-shaped tubes 11, thus improving the efficiency of airflow measurement. Then, the transmitter 20 calculates the airflow based on the wind speed signals from the multiple flute-shaped tubes 11 and the cross-sectional area of ​​the duct, thereby improving the efficiency of airflow measurement while ensuring accuracy.

[0067] It should be noted that the flute tube 11 is short for flute-shaped Pitot tube. In some embodiments, the flute tube 11 is also called a probe. The transmitter 20 is a device used to convert and process the physical quantity signal (such as differential pressure signal) collected by the sensor into a standard electrical signal. Specifically, the transmitter 20 can be a differential pressure transmitter, and the wind speed signal measured by the flute tube 11 is a differential pressure signal.

[0068] It should be noted that, Figure 1 The ellipsis in the text indicates that the flute array 10 may include multiple flute tubes 11, such as two or more flute tubes 11. The thick black rectangle represents the duct wall. It should be noted that the cross-sectional shape of the duct wall can be any shape other than a rectangle, such as a circle, ellipse, or irregular shape, and is not limited to this.

[0069] In some embodiments, such as Figure 2 As shown, transmitter 20 can be a five-channel wind speed transmitter. The five-channel wind speed transmitter can be physically connected to multiple (e.g., five) flute tubes 11 via flexible hoses (e.g., pressure-conducting hoses). The wind speed signal output by the flute tubes 11 is transmitted to transmitter 20 through the flexible hoses. Each flute tube 11 is provided with multiple pressure taps.

[0070] Specifically, the sampling frequency of the five-channel wind speed transmitter is greater than or equal to 100 Hz.

[0071] It should be noted that installing the flute tube 11 by welding would damage the duct structure. In this embodiment, the flute tube 11 is magnetically connected to the duct wall using the magnetic fastening module 30. This not only reduces the time required for arranging the flute tube 11 to improve the efficiency of airflow measurement, but also reduces damage to the duct structure and its sealing.

[0072] In some embodiments, taking a nuclear power plant as an example, the ventilation system needs to be shut down during airflow testing, resulting in low efficiency in airflow measurement and causing economic losses for the power plant. This application embodiment improves the efficiency of airflow measurement, thereby shortening the downtime of the nuclear power plant's ventilation system and reducing its economic losses.

[0073] Please see Figure 1 and Figure 2 In some embodiments, each magnetic fastening module 30 includes a magnetic base and a fastener (not shown in the figure);

[0074] The duct wall is magnetic, and the duct wall has an outer wall;

[0075] The magnetic base is magnetically connected to the outer wall; the tube wall is provided with a first opening, the magnetic base is provided with a second opening, and the second opening and the first opening are aligned; the flute-shaped tube 11 is sequentially inserted into the first opening and the second opening, and the flute-shaped tube 11 is connected to the magnetic base by a fastener.

[0076] The advantage of this embodiment lies in the magnetic connection between the magnetic base and the outer wall of the duct, with the first opening on the duct wall aligned with the second opening on the magnetic base. This allows the flute-shaped tube 11 to be precisely inserted into the two holes, and the flute-shaped tube 11 is securely connected to the magnetic base using fasteners. This magnetic connection enables rapid installation and arrangement of the flute-shaped tube 11 on the duct wall, eliminating the need for welding or complex fixing processes, thus avoiding the time-consuming installation required for welding, shortening the deployment time of multiple flute-shaped tubes 11, and improving the efficiency of airflow measurement. Furthermore, the ease of disassembly of the magnetic base facilitates the repositioning or repeated arrangement of the flute-shaped tube 11, enhancing the flexibility of the airflow measurement device.

[0077] In some embodiments, the duct wall may be magnetic. For example, the duct wall may be made of a magnetic material. Magnetic material refers to a material that can be attracted by a magnet, such as iron, nickel, cobalt, and their alloys. Alternatively, magnetic elements, such as magnets, may be provided on the duct wall.

[0078] In some embodiments, the fastener may be a gland. The gland is used to engage with the magnetic base to lock the flute tube 11, thereby fixing and sealing the flute tube 11. In another embodiment, the fastener may also include other components, such as bolts, nuts, etc., and is not limited thereto.

[0079] Specifically, the magnetic base being magnetically connected to the outer wall means that the magnetic base is magnetically attached to the outer wall.

[0080] In some embodiments, the magnetic base may have a magnetic layer and a stainless steel layer. Specifically, the magnetic layer may be made of neodymium magnets, such as N52 grade neodymium magnets. The stainless steel layer may be made of 304 stainless steel. For example, the magnetic force of the magnetic base is greater than or equal to 15 Newtons per square centimeter (N / cm²). 2 The operating temperature range is from -20℃ to 150℃.

[0081] In some embodiments, for example, the duct wall is provided with a plurality of first openings, and each flute tube 11 passes through one of the first openings, such that a portion (first portion) of the flute tube 11 is located inside the duct, and another portion (second portion) of the flute tube 11 is located outside the duct. Specifically, the first portions of the plurality of flute tubes 11 are arranged on the same cross-section inside the duct.

[0082] In some embodiments, the diameter of the first opening may range from 1.9 mm to 2.1 mm. The surface roughness of the first opening is less than or equal to 0.8 μm.

[0083] In some embodiments, the surface of the first opening may be coated with a Teflon coating. For example, in complex working environments such as nuclear power plants, during airflow commissioning, there are often environmental interference factors such as cutting, grinding, and chemical fumes. The Teflon coating on the surface of the first opening can improve its wear resistance, corrosion resistance, and non-stick properties, prevent oily substances from contaminating it, reduce wear on the flute tube 11, and thus improve the reliability and durability of the airflow measuring device.

[0084] In some embodiments, multiple first openings are uniformly arranged on the same cross-section of the duct, thereby improving the accuracy of airflow measurement. For example, in the ventilation system of a nuclear power plant, the airflow velocity inside the duct is relatively high, the number of long straight sections of the duct is relatively small, and the number of resistance components such as elbows, reducers, and tees is relatively large. These factors make it difficult to achieve uniform airflow velocity at different locations on the same cross-section of the duct, resulting in a significant difference in airflow velocity between the center and the edge of the cross-section. This embodiment of the application improves the accuracy of airflow measurement by simultaneously and uniformly arranging multiple first openings on the duct wall corresponding to the cross-section of the duct, allowing for uniform measurement of the airflow velocity across the cross-section through multiple flute-shaped tubes 11.

[0085] In some embodiments, the cross-section of the duct is axisymmetric;

[0086] Multiple first openings are symmetrically arranged on the duct wall along the axis of symmetry of the cross section; multiple flute-shaped tubes 11 are symmetrically arranged on the cross section along the axis of symmetry of the cross section.

[0087] The advantage of this embodiment is that by symmetrically arranging the first opening and the flute-shaped tubes 11 inserted therethrough along the axis of symmetry of the duct cross-section, a spatially symmetrical flute-shaped tube array 10 is formed. This design ensures that the systematic errors such as airflow interference and installation deviations experienced by the flute-shaped tubes 11 at symmetrical positions during the measurement process exhibit characteristics of equal magnitude and opposite direction, so that the errors cancel each other out during the airflow calculation process, thereby improving the accuracy of airflow measurement.

[0088] In some embodiments, specifically, the maximum deviation between the measured distance between the central axes of the two symmetrically arranged first openings and the preset theoretical distance does not exceed 2 millimeters (mm), thereby ensuring the accuracy of the opening position.

[0089] In some embodiments, a magnetic suction head is provided at the end of the flute tube 11 inside the air duct;

[0090] The pipe wall has an inner wall;

[0091] The magnetic head at the end of the flute-shaped tube 11 is magnetically connected to the inner wall of the duct.

[0092] The advantage of this embodiment lies in the fact that by adding a magnetic head to the end of the flute-shaped tube 11, it is directly magnetically connected to the inner wall surface of the duct inside the duct, thereby fixing the flute-shaped tube 11 through a dual fixing mechanism: specifically, the flute-shaped tube 11 is connected to the outer wall of the duct through the magnetic fastening module 30, while inside the duct, it is magnetically connected to the inner wall through the magnetic head. This enhances the vibration resistance of the flute-shaped tube 11 in high-speed airflow environments, effectively suppresses the displacement or swaying of the flute-shaped tube 11 caused by airflow impact, thereby ensuring the accuracy and stability of wind speed signal acquisition, and thus improving the reliability of airflow measurement.

[0093] It should be noted that the magnetic fastening module 30 and the magnetic head at the end of the flute tube 11 cooperate with each other to fix the flute tube 11 to the air duct.

[0094] In some embodiments, the transmitter 20 may include any one or more components selected from a touchscreen, physical buttons, and physical knobs. For example, as... Figure 3 As shown, the transmitter 20 may include multiple physical buttons, specifically including: a setting button for setting or confirming, an upward directional button, a downward directional button, and a return button. In another embodiment, the transmitter 20 may also include a 7-inch touchscreen.

[0095] In some embodiments, such as Figure 4As shown, in the normal display state of transmitter 20, the user can enter the main menu interface by pressing and holding the setting button, for example, for two seconds. The normal display interface shows information such as wind speed and air volume. The unit of wind speed is meters per second (m / s), and the unit of air volume is cubic meters per hour (m³ / h). 3 / h). On the main menu interface, you can use the arrow keys to select the menu option you want to set. For example, the main menu options may include display settings, range settings, and pipe inner diameter. For example, you can short-press the settings button to enter the display settings to set relevant parameters, and then use the arrow keys to select the item to set, such as display parameters (e.g., wind speed), backlight parameters, etc. The backlight parameters can be preset constants. After setting, you can click the back button to return to the previous menu level, such as returning to the main menu interface from the display settings interface. It should be noted that... Figure 4 The white numbers (such as 1, 2, 3, etc.) in the black circles are used to indicate the order of the operation process.

[0096] In some embodiments, the upper limit of the wind speed range can be set to 30 m / s, the upper limit of the temperature range to 50 degrees Celsius, and the lower limit of the temperature range to 0 degrees Celsius in the range setting interface. In another embodiment, the wind speed sampling period can be set to 1 second (m) via the transmitter 20. In yet another embodiment, the wind speed signal cutoff threshold can be set to 0.2 m / s via the transmitter 20, thereby ignoring wind speed signals less than or equal to the cutoff threshold and calculating the air volume only based on wind speed signals greater than the threshold, reducing interference signals in wind speed measurement.

[0097] In some embodiments, the airflow measurement device may further include a server, which is communicatively connected to the transmitter 20. For example, the server may be wirelessly connected to the transmitter 20. Alternatively, the server may be connected to the transmitter 20 via a communication cable. In some embodiments, when the server and transmitter 20 are far apart, a communication module box may be added to forward data from the transmitter 20 to the server.

[0098] Specifically, the server can be a personal computer (PC), a laptop, or a cloud server, or other types of computers. In some embodiments, a ventilation system airflow balance test platform can be run on the server to conduct airflow balance tests. The ventilation system airflow balance test can compare the measured wind speed (such as the average wind speed below) with a preset theoretical wind speed value and provide adjustment suggestions for the ventilation system until the airflow meets the design requirements, such as falling within a preset airflow threshold range.

[0099] In some embodiments, the server generates a flow field distribution map (e.g., a flow field cloud map) based on information such as air velocity and air volume in the duct, and displays the flow field distribution map so that users can intuitively understand the air volume measurement results. For example, as Figure 5 As shown, the server displays multiple flow field distribution maps, which may include velocity field maps, pressure field maps, and flow field vector maps. It should be noted that the three white dots in the velocity field map, pressure field map, or flow field vector map each represent a flute-shaped tube. Furthermore, the color changes in the velocity field map reflect the changes in velocity magnitude in different regions of the flow field; for example, a color change from red to blue in the velocity field map indicates a change in wind speed from high to low. Similarly, the color changes in the pressure field map reflect the changes in pressure magnitude in different regions of the flow field; for example, a color change from red to blue in the pressure field map indicates a change in air pressure from high to low.

[0100] In some embodiments, the plurality of flute tubes 11 may include different sizes. The flute tube size may include: flute tube length and the total number of pressure holes (hereinafter referred to as the number of flute tube openings). For example, such as... Figure 6 As shown, the various flute sizes include: size L1, size L2, size L3, and size L4. Size L1 has a flute length of 550mm and 10 holes; size L2 has a flute length of 1000mm and 8 holes; size L3 has a flute length of 1500mm and 10 holes; and size L4 has a flute length of 1800mm and 8 holes.

[0101] In some embodiments, it should be noted that different sizes of flute-shaped tubes 11 are adapted to different sizes of air ducts. Specifically, when the cross-section of the air duct is rectangular, Figure 6The horizontal axis represents the width of the duct's cross-section, and the vertical axis represents its length. For example, the flute-shaped tube 11 of size L1 can fit ducts with dimensions (i.e., the length of the duct's cross-section) ranging from 120mm to 400mm. The flute-shaped tube 11 of size L2 can fit ducts with dimensions ranging from 500mm to 800mm. The flute-shaped tube 11 of size L3 can fit ducts with dimensions ranging from 1000mm to 1250mm. The flute-shaped tube 11 of size L4 can fit ducts with a length of 1600mm. This embodiment of the application, by using multiple sizes of flute-shaped tubes 11, can adapt to various duct cross-sections, meeting the measurement requirements of different ducts for parameters such as wind speed, air volume, and air pressure. For example, in a nuclear power plant scenario, the ventilation system includes ducts with various cross-sectional dimensions, which affects the selection of the flute-shaped tube 11 size, leading to a more complex arrangement for airflow balance tests. The multi-size flute tube 11 of this application embodiment can improve the versatility of the air volume measurement device and is suitable for scenarios with complex ventilation systems, such as nuclear power plants.

[0102] It should be noted that when the cross-section of the duct is rectangular, the compatibility of the flute-shaped tube 11 with the duct's cross-sectional length can be determined by comparing the length of the flute-shaped tube with the length of the duct's cross-section. For example, if the length of the flute-shaped tube is greater than or equal to 90% of the length of the duct's cross-section, then the flute-shaped tube 11 is compatible with the duct.

[0103] In some embodiments, the flute tube 11 may have an embedded RFID (Radio Frequency Identification) chip. The RFID chip is used to store specifications such as the length of the flute tube and the number of holes in the flute tube.

[0104] Figure 7 This is an optional flowchart of the air volume measurement method provided in the embodiments of this application. Figure 7 The airflow measurement method described above is applied to the airflow measurement device. The airflow measurement method may include, but is not limited to, steps 101 to 105:

[0105] Step 101: Obtain the wind speed differential pressure signal of each of the multiple flute tubes; wherein, the flute tubes are used to measure the wind speed of the airflow in the target duct, and the multiple flute tubes are arranged on the target cross-section inside the duct.

[0106] Step 102: Obtain the target fluid density of the airflow inside the target duct;

[0107] Step 103: Calculate the flow velocity based on the wind speed differential pressure signal and the target fluid density of each flute-shaped tube to obtain the local wind speed corresponding to each flute-shaped tube;

[0108] Step 104: Fusion of data from multiple local wind speeds to obtain the average wind speed;

[0109] Step 105: Calculate the flow rate based on the average wind speed and the cross-sectional area of ​​the target cross section to obtain the target air volume.

[0110] The beneficial effects of this application's embodiments include, but are not limited to: acquiring the wind speed differential pressure signal of each flute-shaped pipe and calculating the local wind speed in conjunction with the target fluid density, thereby utilizing the physical relationship between differential pressure and flow velocity (such as Bernoulli's principle) to convert the differential pressure signal into the local wind speed of the area where the flute-shaped pipe is located. Then, by fusing multiple local wind speeds to obtain the average wind speed, the flow velocity distribution information of different areas on the cross-section of the duct can be comprehensively integrated, overcoming the local errors caused by flow field distortion in single-point measurements. Especially under complex working conditions of high turbulence or uneven flow velocity, multi-point spatial sampling can significantly improve the accuracy of wind speed. Then, the target air volume is calculated based on the average wind speed and cross-sectional area, thereby improving the accuracy of air volume measurement and making the calculated air volume result closer to the true value.

[0111] In step 101 of some embodiments, the target duct refers to the duct whose airflow needs to be measured. Specifically, the target duct can be a ventilation duct of a ventilation system. For example, in a nuclear power plant scenario, the target duct can be a duct in the ventilation system of the nuclear power plant. As another example, in a public transportation scenario, the target duct can be a duct in the ventilation system of a subway tunnel, airport terminal, or train station. In another embodiment, the target duct can also be a duct of a heating, ventilation, and air conditioning (HVAC) system. For example, the target duct can be a duct of a heating, ventilation, and air conditioning (HVAC) system, or a duct in the HVAC system of a nuclear power plant.

[0112] It should be noted that the target cross-section refers to the cross-section inside the target duct containing multiple flute-shaped tubes. The wind speed differential pressure signal is the pressure difference signal measured by the flute-shaped tubes, and it is used to characterize the wind speed.

[0113] In step 102 of some embodiments, the target fluid density refers to the fluid density of the airflow within the target duct.

[0114] In step 103 of some embodiments, the flow velocity can be calculated using Bernoulli's equation based on the wind speed signals from multiple pressure taps of the same flute-shaped tube and the target fluid density, to obtain the local wind speed corresponding to each flute-shaped tube. Other methods can also be used to calculate the local wind speed, and this is not a limitation.

[0115] In step 104 of some embodiments, the average wind speed can be obtained by weighted summation of multiple local wind speeds. For example, the average wind speed is defined by the following formula:

[0116]

[0117] Among them, Vavg Indicates average wind speed; v i k represents the local wind speed corresponding to the i-th flute tube; i represents the wind speed distribution weighting coefficient corresponding to the i-th flute; N represents the number of flute tubes.

[0118] Specifically, the number N of flute tubes can be 5.

[0119] In some embodiments, the wind speed distribution weighting coefficient is an empirical value. It should be noted that, based on fluid characteristics, the fluid region near the pipe wall experiences high resistance, resulting in low flow velocity. Conversely, the fluid in the middle region inside the duct experiences low resistance, leading to high flow velocity. Therefore, the wind speed distribution weighting coefficient for the flute-shaped pipe near the pipe wall can be set to be greater than that for the flute-shaped pipe farther from the pipe wall.

[0120] In some embodiments, for example, for such Figure 2 The five flute-shaped tubes shown are numbered sequentially from left to right as flute 1, flute 2, flute 3, flute 4, and flute 5. For flute 1 and flute 5, which are closest to the tube wall, their respective wind speed distribution weighting coefficients k1 and k5 can be set to 0.8. For flute 2, flute 3, and flute 4 in the middle area, their respective wind speed distribution weighting coefficients k2, k3, and k4 can be set to 1.2.

[0121] In step 105 of some embodiments, the target air volume is defined as: Q = A × V AVG ×α. Where Q represents the target air volume; A represents the cross-sectional area of ​​the target cross section; V AVG α represents the average wind speed; α represents the flow field distortion correction factor.

[0122] In some embodiments, the unit of cross-sectional area may be square meters. The value range of the flow field distortion correction factor may include 0.95 to 1.05. Specifically, the flow field distortion correction factor can be calculated based on the Reynolds number (Re). For example, the flow field distortion correction factor is defined as: α = 1.03 - 0.02 × log 10 (Re / 10 5 ).

[0123] In some embodiments, for example, when the target cross-section is rectangular, the cross-sectional area can be calculated based on the length and width of the target cross-section. As another example, when the target cross-section is circular, the cross-sectional area can be calculated based on the radius of the target cross-section. The cross-sectional area of ​​the target cross-section can also be obtained in other ways, and is not limited to these.

[0124] In some embodiments, a long straight duct section can be identified as the target duct in the ventilation system to facilitate the calculation of the cross-sectional area and to facilitate the installation of flute-shaped pipes in the target duct.

[0125] Please see Figure 8 In some embodiments, prior to step 101, the airflow measurement method may include, but is not limited to, steps 201 to 204:

[0126] Step 201: Set multiple openings on the wall of the target duct and pass each flute tube through one opening so that multiple flute tubes are on the target cross-section.

[0127] Step 202: Measure the angle between the axial direction of each flute-shaped tube and the airflow direction in the target duct to obtain the axial flow direction angle of each flute-shaped tube.

[0128] Step 203: Calculate the difference between the axial flow direction angle and the right angle of each flute tube to obtain the angular deviation value of each flute tube;

[0129] Step 204: If the angle deviation value does not fall within the preset angle deviation range, then adjust the angle of the flute tube.

[0130] The advantage of this embodiment lies in that by setting multiple openings on the wall of the target duct and inserting each flute-shaped tube through one of these openings, the multiple flute-shaped tubes are precisely positioned on the same cross-section, allowing for subsequent calculation of airflow based on wind speed signals measured within the same cross-section. By measuring the angle between the axis of each flute-shaped tube and the airflow direction and calculating the angle deviation value, the angle deviation value can characterize the degree of deviation of the flute-shaped tube's installation angle from the ideal vertical state. By determining whether the angle deviation value exceeds a preset range, the angle of the flute-shaped tube is adjusted. This dynamically corrects the positional deviation of the flute-shaped tube caused by installation errors, loose installation, airflow impact, etc., thereby ensuring that the axis of the flute-shaped tube is nearly perpendicular to the airflow direction, reducing wind speed measurement deviation caused by oblique pressure measurement, improving wind speed accuracy, and consequently improving the accuracy of airflow measurement.

[0131] In step 201 of some embodiments, multiple openings can be set on the wall of the target duct according to preset opening layout information. Specifically, the opening layout information may include the number of openings, the distance between two adjacent openings, the diameter of the openings, and so on.

[0132] In step 202 of some embodiments, the axial flow angle refers to the angle between the axial direction of the flute-shaped tube and the airflow direction in the target duct. The airflow direction can be a pre-defined direction. For example, the airflow direction can be parallel to the wall of the target duct.

[0133] Specifically, a laser positioning device can be used to measure the angle between the axial direction of each flute tube and the airflow direction in the target duct.

[0134] In step 203 of some embodiments, the angular deviation value refers to the difference between the axial flow angle and the right angle.

[0135] In step 204 of some embodiments, if the angle deviation value is not within the preset angle deviation range, it indicates that the positional deviation of the flute tube is large, which will affect the accuracy of wind speed measurement. It should be noted that the axial direction of the flute tube needs to be perpendicular to the fluid flow direction (such as the airflow direction) to ensure accurate measurement of fluid velocity.

[0136] In some embodiments, the angular deviation range may include -3° (degrees) to +3°.

[0137] Please see Figure 9 In some embodiments, step 102 may include, but is not limited to, steps 301 to 302:

[0138] Step 301: The temperature of the airflow in the target duct is measured by a temperature sensor deployed inside the target duct to obtain the target airflow temperature;

[0139] Step 302: Obtain the absolute pressure and molar mass of the airflow in the target duct, and perform temperature compensation calculation based on the target airflow temperature, absolute pressure, and molar mass to obtain the target fluid density.

[0140] The advantage of this embodiment lies in the real-time measurement of the target airflow temperature using temperature sensors deployed within the target duct. This allows for the acquisition of airflow temperature parameters within the duct to calculate fluid density, avoiding density calculation errors caused by ambient temperature fluctuations. Furthermore, by acquiring the absolute pressure and molar mass of the airflow, and then performing temperature compensation calculations based on the target airflow temperature, absolute pressure, and molar mass, density fluctuations caused by ambient temperature changes can be dynamically corrected based on the ideal gas law or other density calculation methods. This reduces airflow calculation errors caused by density deviations and improves the accuracy of airflow measurement.

[0141] In step 301 of some embodiments, the target airflow temperature is the temperature of the airflow within the target duct. The unit of the target airflow temperature can be degrees Celsius.

[0142] In step 302 of some embodiments, the target fluid density is defined as: ρ = R × (T + 273.15) Pabs × M. Wherein, ρ represents the target fluid density; R represents the ideal gas constant; T represents the target gas flow temperature; Pabs represents the absolute pressure; and M represents the gas molar mass.

[0143] Specifically, the unit for the target fluid density can be kilograms per cubic meter (kg / m³). 3 ).

[0144] In another embodiment, the target fluid density can also be calculated in other ways, such as by using an artificial intelligence model, but is not limited thereto.

[0145] Please see Figure 10 In some embodiments, step 103 may include, but is not limited to, steps 401 to 402:

[0146] Step 401: Perform numerical conversion on the wind speed differential pressure signal of each flute tube to obtain the wind speed differential pressure value, and perform square root calculation based on the ratio of the wind speed differential pressure value to the target fluid density to obtain the original wind speed corresponding to each flute tube.

[0147] Step 402: Multiply the original wind speed corresponding to each flute tube by the preset correction coefficient to obtain the local wind speed corresponding to each flute tube.

[0148] The advantage of this embodiment lies in the fact that by numerically converting the wind speed differential pressure signal of each flute to obtain the wind speed differential pressure value, and then calculating the original wind speed by taking the square root of the ratio of the wind speed differential pressure value to the target fluid density, the wind speed differential pressure signal can be converted into a flow velocity value using Bernoulli's equation. Then, the original wind speed corresponding to each flute is multiplied by a preset correction coefficient to obtain the local wind speed. This allows for the introduction of correction coefficients based on factors such as the installation position of the flute, compensating for deviations between the theoretical model and actual operating conditions, thereby improving the accuracy of wind speed measurement, and consequently improving the accuracy and reliability of airflow measurement.

[0149] In step 401 of some embodiments, the square root can be calculated based on the product of the wind speed differential pressure value and a preset constant (e.g., 2) and the ratio of the target fluid density.

[0150] In step 402 of some embodiments, the local wind speed is defined as shown in the following formula:

[0151]

[0152] Among them, v i ΔP represents the local wind speed corresponding to the i-th flute-shaped tube; i The wind speed differential pressure value corresponding to the i-th flute tube is represented by ρ; the target fluid density is represented by C. d This represents the correction factor.

[0153] It should be noted that, This represents the original wind speed in step 401.

[0154] In some embodiments, the wind speed differential pressure value can specifically be dynamic pressure (also called dynamic pressure difference). It should be noted that the flute tube can measure both static pressure and total pressure, and then the dynamic pressure can be calculated from the static pressure and total pressure. Static pressure refers to the pressure exerted by the gas on the pipe wall when it is at rest. Dynamic pressure refers to the pressure component corresponding to the kinetic energy generated by the velocity of the fluid during flow. Numerically, dynamic pressure is equal to the difference between total pressure and static pressure.

[0155] In some embodiments, the correction factor may range from 0.98 to 1.02. Specifically, the correction factor can be obtained through CFD (Computational Fluid Dynamics) simulation, wind tunnel calibration, or other methods.

[0156] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described airflow measurement method. This electronic device can include any smart terminal such as a tablet computer or in-vehicle computer.

[0157] Please see Figure 11 , Figure 11 The hardware structure of an electronic device according to another embodiment is illustrated. The electronic device includes:

[0158] The processor 1101 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0159] The memory 1102 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1102 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1102 and is called and executed by the processor 1101 using the XXX method of the embodiments of this application.

[0160] Input / output interface 1103 is used to implement information input and output;

[0161] The communication interface 1104 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0162] Bus 1105 transmits information between various components of the device (e.g., processor 1101, memory 1102, input / output interface 1103, and communication interface 1104);

[0163] The processor 1101, memory 1102, input / output interface 1103 and communication interface 1104 are connected to each other within the device via bus 1105.

[0164] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described airflow measurement method.

[0165] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0166] It should be noted that the software tools or components not belonging to our company that appear in the embodiments of this application are merely examples and do not represent actual use.

[0167] The embodiments described in this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0168] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0169] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0170] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0171] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0172] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0173] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, or indirect coupling or communication connection between the apparatus or units, and may be electrical, mechanical, or other forms.

[0174] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0175] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0176] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0177] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. An air volume measuring device, characterized in that, The air volume measuring device includes: The system includes a flute array, a transmitter, and multiple magnetic fastening modules; wherein the flute array comprises multiple flute tubes. Each of the aforementioned flute tubes is magnetically connected to the wall of the duct via the magnetic fastening module; multiple flute tubes are arranged on the same cross-section inside the duct; each of the aforementioned flute tubes is connected to the transmitter; Each of the aforementioned flute tubes is used to measure the airflow speed inside the duct to obtain a wind speed signal; the transmitter is used to calculate the air volume based on the wind speed signals obtained from the multiple flute tubes and the cross-sectional area of ​​the cross section.

2. The air volume measuring device according to claim 1, characterized in that, Each of the magnetic fastening modules includes a magnetic base and a fixing element; The duct wall is magnetic, and the duct wall has an outer wall; The magnetic base is magnetically connected to the outer wall; the tube wall is provided with a first opening, the magnetic base is provided with a second opening, and the second opening and the first opening are aligned; the flute-shaped tube is sequentially inserted into the first opening and the second opening, and the flute-shaped tube is connected to the magnetic base through the fixing member.

3. The air volume measuring device according to claim 2, characterized in that, The cross-section of the duct is axisymmetric. The plurality of first openings are symmetrically arranged on the pipe wall of the duct along the axis of symmetry of the cross section; the plurality of flute-shaped tubes are symmetrically arranged on the cross section along the axis of symmetry of the cross section.

4. The air volume measuring device according to claim 1, characterized in that, A magnetic suction head is provided at the end of the flute-shaped tube inside the air duct; The pipe wall has an inner wall; The magnetic head at the end of the flute-shaped tube is magnetically connected to the inner wall of the duct.

5. A method for measuring air volume, characterized in that, The method, applied to the air volume measuring device according to any one of claims 1 to 4, comprises: The wind speed differential pressure signal of each of the plurality of flute tubes is acquired; wherein the flute tubes are used to measure the wind speed of the airflow in the target duct, and the plurality of flute tubes are arranged on the target cross section inside the duct; Obtain the target fluid density of the airflow within the target duct; The flow velocity is calculated based on the wind speed differential pressure signal and the target fluid density of each of the flute-shaped tubes to obtain the local wind speed corresponding to each of the flute-shaped tubes. The average wind speed is obtained by fusing data from multiple local wind speeds. The target air volume is obtained by calculating the flow rate based on the average wind speed and the cross-sectional area of ​​the target cross section.

6. The air volume measurement method according to claim 5, characterized in that, Before acquiring the wind speed differential pressure signal for each of the plurality of flute tubes, the method further includes: Multiple openings are provided on the wall of the target duct, and each of the flute-shaped tubes is inserted through one of the openings, so that the multiple flute-shaped tubes are located on the target cross-section; The angle between the axial direction of each flute-shaped tube and the airflow direction in the target duct is measured to obtain the axial flow direction angle of each flute-shaped tube. The angle deviation value of each flute tube is obtained by calculating the difference between the axial flow direction angle and the right angle of each flute tube. If the angle deviation value does not fall within the preset angle deviation range, the angle of the flute tube is adjusted.

7. The method according to claim 5, characterized in that, The step of obtaining the target fluid density of the airflow within the target duct includes: The temperature of the target airflow is obtained by measuring the temperature of the airflow inside the target airflow using a temperature sensor deployed inside the target airflow duct. The absolute pressure and molar mass of the airflow in the target duct are obtained, and the target fluid density is obtained by performing temperature compensation calculation based on the target airflow temperature, the absolute pressure, and the molar mass of the gas.

8. The method according to any one of claims 5 to 7, characterized in that, The step of calculating the flow velocity based on the wind speed differential pressure signal and the target fluid density of each of the flute-shaped tubes to obtain the local wind speed corresponding to each of the flute-shaped tubes includes: The wind speed differential pressure signal of each of the flute tubes is numerically converted to obtain the wind speed differential pressure value, and the original wind speed corresponding to each flute tube is obtained by square root calculation based on the ratio of the wind speed differential pressure value to the target fluid density. The original wind speed corresponding to each of the aforementioned flute tubes is multiplied by a preset correction coefficient to obtain the local wind speed corresponding to each flute tube.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the air volume measurement method according to any one of claims 5 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the air volume measurement method according to any one of claims 5 to 8.

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