Flow resistivity testing methods, systems, computer equipment, and storage media

Abstract

This application relates to a flow resistivity testing method, system, computer device, and storage medium. The method is applied to a flow resistivity tester. The front end of the flow resistivity tester is used to place a sample to be tested, which divides the cavity of the flow resistivity tester into a first cavity and a second cavity. After obtaining the specifications of the sample to be tested, the flow rate value of the first cavity is obtained after placing the sample into the front end of the flow resistivity tester. A first air pressure value is obtained within the first cavity at the middle section of the flow resistivity tester, and a second air pressure value is obtained outside the flow resistivity tester. Finally, based on the flow rate value, the first air pressure value, the second air pressure value, and the specifications, the flow resistivity test result of the sample is obtained. The flow resistivity tester is simple in construction, inexpensive, reusable, and can be used in conjunction with other common external devices for flow resistivity testing, thereby reducing the cost of the flow resistivity testing system.

Description

Technical Field

[0001] This application relates to the field of automotive noise measurement technology, and in particular to a flow resistivity testing method, system, computer equipment, storage medium, and computer program product. Background Technology

[0002] As people's living standards continue to improve, consumers' demands for noise comfort in commercial vehicles are gradually increasing. The sound insulation and absorption performance of the acoustic package in the cab directly affects the noise level inside the vehicle. The main parameters affecting the performance of the acoustic package include: sound absorption coefficient, porosity, flow resistance, tortuosity, thermal characteristic length, and viscous characteristic length. Among these, the sound absorption coefficient and flow resistance can be obtained through instrument testing, enabling simulation-based derivation of the aforementioned acoustic package parameters and supporting the simulation development of cab acoustic packages. Sound absorption coefficient measurement is relatively mature, as it can be obtained through an impedance tube. Besides measuring the sound absorption coefficient, the impedance tube can also be used to measure sound insulation and transmission loss, making it widely applicable. However, while the method for measuring flow resistance is not complex, purchasing a flow resistance tester is costly and has limited applications. Therefore, developing a simple, low-cost, and highly accurate flow resistance testing device is crucial for the research and development of automotive acoustic packages.

[0003] Currently, the cost of conducting flow resistance tests is relatively high. Summary of the Invention

[0004] Therefore, it is necessary to provide a flow resistance testing method, system, computer equipment, computer-readable storage medium, and computer program product that can reduce the cost of flow resistance testing in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a flow resistivity testing method applied to a flow resistivity tester. The flow resistivity tester includes a front end, a middle section, and a rear end, which together form a connected cavity. The front end is used to place a sample to be tested, which divides the cavity into a first cavity and a second cavity. The first cavity includes the cavity at the rear end, the cavity at the middle section, and a portion of the cavity at the front end. The second cavity includes another portion of the cavity at the front end. The method includes:

[0006] Obtain the specifications of the sample to be tested;

[0007] Place the sample to be tested into the front end of the flow resistance tester and obtain the flow rate value of the first cavity;

[0008] The first air pressure value inside the first cavity is obtained in the middle section of the flow resistance tester, and the second air pressure value is obtained outside the flow resistance tester.

[0009] The flow resistance test results of the sample under test are obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0010] In one embodiment, the rear end of the flow resistance tester serves as the air inlet of the flow resistance tester, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester.

[0011] In one embodiment, the second pressure value is standard atmospheric pressure.

[0012] In one embodiment, the sample to be tested is a cylinder made of porous material. Obtaining the dimensional parameters of the sample to be tested includes:

[0013] Obtain the base area and height of the cylinder as the specification parameters of the sample to be tested.

[0014] In one embodiment, the flow resistivity test result of the sample under test is obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters, including:

[0015] The pressure difference is obtained based on the first and second air pressure values.

[0016] Obtain the ratio between the base area and the height of the cylinder;

[0017] The flow resistance test results of the sample under test are obtained based on the flow rate, air pressure difference, and ratio.

[0018] In one embodiment, the method further includes:

[0019] Multiple flow resistivity test results were obtained for multiple test samples, each using the same porous material type but different specifications.

[0020] Based on the flow resistance test results of each sample under test, the average value of multiple flow resistance test results is obtained as the flow resistance test result for porous material type.

[0021] Secondly, this application also provides a flow resistivity testing system. The system includes:

[0022] The flow resistivity tester includes a front end, a middle section, and a rear end. The front end, middle section, and rear end together form a connected cavity. The front end is used to place the sample to be tested and is connected to the atmosphere. The rear end is used to connect to flow rate testing equipment.

[0023] The sample under test is used to divide the cavity of the flow resistivity tester into a first cavity and a second cavity. The first cavity includes the cavity at the rear end of the flow resistivity tester, the cavity in the middle section of the flow resistivity tester, and a part of the cavity at the front end of the flow resistivity tester. The second cavity includes another part of the cavity at the front end of the flow resistivity tester.

[0024] A flow rate testing device, connected to the back end of a flow resistance tester, is used to obtain the flow rate value of the first cavity;

[0025] The flow rate testing equipment is also used to obtain the first air pressure value inside the first cavity in the middle section of the flow resistance tester, obtain the second air pressure value outside the flow resistance tester, and obtain the specification parameters of the sample to be tested. Based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters, the flow resistance test result of the sample to be tested is obtained.

[0026] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0027] Obtain the specifications of the sample to be tested;

[0028] Place the sample to be tested into the front end of the flow resistance tester and obtain the flow rate value of the first cavity;

[0029] The first air pressure value inside the first cavity is obtained in the middle section of the flow resistance tester, and the second air pressure value is obtained outside the flow resistance tester.

[0030] The flow resistance test results of the sample under test are obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0031] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0032] Obtain the specifications of the sample to be tested;

[0033] Place the sample to be tested into the front end of the flow resistance tester and obtain the flow rate value of the first cavity;

[0034] The first air pressure value inside the first cavity is obtained in the middle section of the flow resistance tester, and the second air pressure value is obtained outside the flow resistance tester.

[0035] The flow resistance test results of the sample under test are obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0036] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0037] Obtain the specifications of the sample to be tested;

[0038] Place the sample to be tested into the front end of the flow resistance tester and obtain the flow rate value of the first cavity;

[0039] The first air pressure value inside the first cavity is obtained in the middle section of the flow resistance tester, and the second air pressure value is obtained outside the flow resistance tester.

[0040] The flow resistance test results of the sample under test are obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0041] The aforementioned flow resistivity testing method, system, computer equipment, storage medium, and computer program product are applied to a flow resistivity tester. The flow resistivity tester includes a front end, a middle section, and a rear end. The front end, middle section, and rear end of the flow resistivity tester together form a connected cavity. The front end of the flow resistivity tester is used to place the sample to be tested. The sample to be tested is used to divide the cavity of the flow resistivity tester into a first cavity and a second cavity. The first cavity includes the cavity of the rear end of the flow resistivity tester, the cavity of the middle section of the flow resistivity tester, and a portion of the cavity of the front end of the flow resistivity tester. The second cavity includes another portion of the cavity of the front end of the flow resistivity tester. By obtaining the specifications of the sample under test, placing it into the front end of the flow resistivity tester, the flow rate of the first chamber is measured, the first air pressure value inside the first chamber is measured in the middle section of the flow resistivity tester, and the second air pressure value is measured outside the flow resistivity tester. Finally, based on the flow rate, first air pressure, second air pressure, and specifications, the flow resistivity test result of the sample is obtained. The flow resistivity tester is simple in construction, inexpensive, reusable, and can be used in conjunction with other common external devices to perform flow resistivity testing, thereby reducing the cost of the flow resistivity testing system. Attached Figure Description

[0042] Figure 1 This is a diagram illustrating the application environment of a flow resistivity testing method in one embodiment.

[0043] Figure 2 This is a schematic diagram of the flow resistivity tester in one embodiment;

[0044] Figure 3 This is a flowchart illustrating a flow resistivity testing method in one embodiment;

[0045] Figure 4 This is a schematic diagram showing the dimensions of a flow resistivity tester in one embodiment.

[0046] Figure 5 This is a schematic diagram of the airflow direction inside the flow resistivity tester in one embodiment;

[0047] Figure 6 This is a schematic diagram of the flow resistivity testing system in one embodiment;

[0048] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0049] 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.

[0050] The flow resistivity testing method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, computer device 102 communicates with flow testing device 104, first sensor 106, and second sensor 108 via wired or wireless communication. Figure 2 As shown, a flow resistivity tester is provided, including a flow resistivity tester front end 201, a flow resistivity tester middle section 202, and a flow resistivity tester rear end 203. The flow resistivity tester front end 201, the flow resistivity tester middle section 202, and the flow resistivity tester rear end 203 together form a connected cavity. The flow resistivity tester front end 201 is used to place a test sample 204. The test sample 204 is used to divide the flow resistivity tester cavity into a first cavity 210 and a second cavity 220. The first cavity 210 includes the cavity of the flow resistivity tester rear end 203, the cavity of the flow resistivity tester middle section 202, and a portion of the cavity of the flow resistivity tester front end 201 (i.e., Figure 2 The second cavity 220 includes another part of the cavity on the right side of the sample 204 under test, and the second cavity 220 includes another part of the cavity at the front end 201 of the flow resistivity tester (i.e., the cavity on the right side of the sample 204 under test). Figure 2(The cavity on the left side of the sample 204 under test). The flow testing device 104 includes a blower connected to the rear end of the flow resistivity tester. The rear end of the flow resistivity tester serves as the air inlet, and the front end serves as the air outlet. The first sensor 106 is disposed in the cavity in the middle section of the flow resistivity tester, and the second sensor 108 is disposed outside the flow resistivity tester. It can be understood that the computer device 102 can specifically be a terminal or a server. The terminal can be directly integrated into the flow testing device 104, and the terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, portable wearable devices, etc. The portable wearable device can be a smartwatch, smart bracelet, head-mounted device, etc. The server can be implemented using a standalone server or a server cluster composed of multiple servers.

[0051] In one embodiment, such as Figure 3 As shown, a flow resistivity testing method is provided, which is applied to... Figure 1 Taking computer device 102 as an example, the following steps are included:

[0052] Step 302: Obtain the specifications of the sample to be tested.

[0053] The test sample is a cylinder made of porous material, and its specifications include the base area and height of the cylinder.

[0054] Specifically, the porous acoustic material is processed into a cylinder with the same inner diameter φ as the front end of the flow resistance testing equipment using a sample cutting machine, and the thickness h of the cylinder is measured.

[0055] Step 304: Place the sample to be tested into the front end of the flow resistance tester and obtain the flow rate value of the first cavity.

[0056] Specifically, the specifications and dimensions of the flow resistivity tester are as follows: Figure 4 As shown, the flow resistivity tester consists of a front end (outer diameter φ = 104 mm, inner diameter φ = 100 mm), a rear end (outer diameter φ = 154 mm), and a middle section (outer diameter φ = 200 mm). The middle section has a cylindrical opening with a diameter φ = 12.5 mm for accommodating the first sensor. A sample with a diameter of φ = 100 mm is placed inside the cylindrical front end of the flow resistivity tester. The rear end of the flow resistivity tester is then directly connected to the blower and flow rate testing equipment, secured externally with clamps. Finally, the first sensor is inserted into the cylindrical opening in the middle section of the flow resistivity tester. After preparation, the blower is turned on to generate a stable airflow within the flow resistivity tester. Once the airflow is stable, the flow rate value Q monitored by the flow rate testing equipment is read. At this time, the airflow direction inside the front end of the flow resistivity tester is as follows: Figure 5As shown in the figure, the black flat cylinder is the sample to be tested. The bottom of the sample is the second cavity, and the top of the sample is part of the first cavity. The second cavity is connected to the atmosphere.

[0057] Step 306: Obtain the first air pressure value inside the first cavity in the middle section of the flow resistance tester, and obtain the second air pressure value outside the flow resistance tester.

[0058] The second air pressure value can be the standard atmospheric pressure, or it can be acquired in real time by a second sensor configured outside the flow resistance tester.

[0059] Specifically, after the airflow inside the flow resistance tester is stabilized, the first air pressure value inside the flow resistance tester collected by the first sensor is read, and the atmospheric pressure value collected by the second sensor is read at the same time.

[0060] Step 308: Obtain the flow resistance test results of the sample under test based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0061] Specifically, using the flow resistance calculation formula The flow resistivity of the sample to be tested is obtained, where σ is the flow resistivity in Pa·s / m. 2 or Ns / m 4 ΔP is Figure 5 The pressure difference between the inside and outside of the flow resistivity tester shown is expressed in Pa or N / m. 2 Q is the gas flow rate through the sample under test, in m³ / s. 3 / h, where S is the area of ​​the bottom circle of the sample to be tested, in m². 2 For example, if the diameter of the sample to be tested is φ = 100 mm, the calculated value is S = πr. 2 =0.0314m 2 The flow resistance of the sample under test can be obtained by substituting the input.

[0062] In one feasible implementation, multiple flow resistance test results are obtained for multiple test samples, each using the same porous material type but with different specifications. Steps 302-208 are performed on each test sample to obtain the flow resistance of each sample, and the average value of these flow resistances is calculated as the flow resistance test result for the porous material type.

[0063] In the above-mentioned flow resistance test method, a flow resistance tester is applied. The flow resistance tester includes a front end, a middle section, and a rear end. The front end, middle section, and rear end of the flow resistance tester together form a connected cavity. The front end of the flow resistance tester is used to place the sample to be tested. The sample to be tested is used to divide the cavity of the flow resistance tester into a first cavity and a second cavity. The first cavity includes the cavity of the rear end of the flow resistance tester, the cavity of the middle section of the flow resistance tester, and a part of the cavity of the front end of the flow resistance tester. The second cavity includes another part of the cavity of the front end of the flow resistance tester. By obtaining the specifications of the sample under test, placing it into the front end of the flow resistivity tester, the flow rate of the first chamber is measured, the first air pressure value inside the first chamber is measured in the middle section of the flow resistivity tester, and the second air pressure value is measured outside the flow resistivity tester. Finally, based on the flow rate, first air pressure, second air pressure, and specifications, the flow resistivity test result of the sample is obtained. The flow resistivity tester is simple in construction, inexpensive, reusable, and can be used in conjunction with other common external devices to perform flow resistivity testing, thereby reducing the cost of the flow resistivity testing system.

[0064] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0065] Based on the same inventive concept, this application also provides a flow resistance testing system for implementing the flow resistance testing method described above. The solution provided by this system is similar to the solution described in the above method; therefore, the specific limitations of one or more flow resistance testing system embodiments provided below can be found in the limitations of the flow resistance testing method described above, and will not be repeated here.

[0066] In one embodiment, such as Figure 6 As shown, a flow resistivity testing system is provided, including: a flow rate testing device 601, a flow resistivity tester 602, a first sensor 603, and a sample to be tested 604, wherein:

[0067] The flow resistivity tester 602 includes a flow resistivity tester front end, a flow resistivity tester middle section, and a flow resistivity tester rear end. The flow resistivity tester front end, the flow resistivity tester middle section, and the flow resistivity tester rear end together form a connected cavity. The flow resistivity tester front end is used to place the sample to be tested 604. The flow resistivity tester front end is used to connect to the atmosphere, and the flow resistivity tester rear end is used to connect to the flow rate testing device 601.

[0068] The test sample 604 is used to divide the cavity of the flow resistance tester 602 into a first cavity and a second cavity. The first cavity includes the cavity at the rear end of the flow resistance tester, the cavity in the middle section of the flow resistance tester, and a part of the cavity at the front end of the flow resistance tester. The second cavity includes another part of the cavity at the front end of the flow resistance tester.

[0069] The flow testing device 601 is connected to the back end of the flow resistance tester and is used to obtain the flow value of the first cavity;

[0070] The flow testing device 601 is also used to obtain a first air pressure value in the first cavity in the middle section of the flow resistance tester, obtain a second air pressure value outside the flow resistance tester 602, and obtain the specification parameters of the sample to be tested 604. Based on the flow value, the first air pressure value, the second air pressure value and the specification parameters, the flow resistance test result of the sample to be tested 604 is obtained.

[0071] In one embodiment, the front end, middle section, and rear end of the flow resistance tester are hollow cylinders of different diameters.

[0072] In one embodiment, the flow testing device 601 includes a blower connected to the rear end of the flow resistance tester. The rear end of the flow resistance tester serves as the air inlet of the flow resistance tester 602, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester 602.

[0073] In one embodiment, the system further includes a first sensor 603 configured in a cavity in the middle section of the flow resistivity tester. The middle section of the flow resistivity tester is configured with a cylindrical opening for arranging the first sensor 603. The first sensor 603 is used to acquire a first air pressure value in the first cavity and transmit the first air pressure value to the flow testing device 601.

[0074] In one embodiment, the system further includes a second sensor configured outside the flow resistivity tester 602, the second sensor being used to acquire an atmospheric pressure value as a second air pressure value and transmit the second air pressure value to the flow test device 601.

[0075] In one embodiment, the sample 604 to be tested is a cylinder made of porous material, and the diameter of the cylinder corresponds to the diameter of the front end of the flow resistance tester.

[0076] The specifications include the base area and height of the cylinder.

[0077] In one embodiment, the flow testing device 601 is further configured to obtain a pressure difference value based on a first pressure value and a second pressure value;

[0078] The flow testing device 601 is also used to obtain the ratio between the base area of ​​the cylinder and the height of the cylinder;

[0079] The flow testing device 601 is also used to obtain the flow resistance test results of the sample 604 under test based on the flow rate value, air pressure difference value and ratio.

[0080] In one embodiment, the flow testing device 601 is also used to acquire multiple flow resistivity test results of multiple test samples 604, each test sample 604 using the same porous material type but different specification parameters;

[0081] The flow rate testing device 601 is also used to obtain the average value of multiple flow resistance test results based on the flow resistance test results of each test sample 604, and use it as the flow resistance test result of the porous material type.

[0082] In this embodiment, the flow resistivity testing equipment is inexpensive, reusable, and uses existing equipment from engineering applications (blower, flow testing system, pressure sensor integrated into the airtightness testing system, sample cutting machine), reducing the cost of the flow resistivity testing system. The air source, internal and external pressure difference, and airflow through the test sample are all measured by the airtightness testing system. This equipment is calibrated and certified by international metrology and testing institutions, ensuring stability and high measurement accuracy.

[0083] The modules in the aforementioned flow resistivity testing system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0084] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores flow rate and air pressure data. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a flow resistivity testing method.

[0085] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0086] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps: acquiring the specification parameters of a sample to be tested; placing the sample to be tested into the front end of a flow resistivity tester and acquiring the flow rate value of a first cavity; acquiring a first air pressure value inside the first cavity in the middle section of the flow resistivity tester and acquiring a second air pressure value outside the flow resistivity tester; and acquiring the flow resistivity test result of the sample to be tested based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0087] In one embodiment, the rear end of the flow resistance tester serves as the air inlet of the flow resistance tester, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester.

[0088] In one embodiment, the second pressure value is standard atmospheric pressure.

[0089] In one embodiment, the sample to be tested is a cylinder made of porous material. When the processor executes the computer program, it also performs the following steps: obtaining the cylinder's base area and cylinder height as specification parameters of the sample to be tested.

[0090] In one embodiment, when the processor executes the computer program, it further performs the following steps: obtaining a pressure difference value based on a first pressure value and a second pressure value; obtaining the ratio between the bottom area of ​​the cylinder and the height of the cylinder; and obtaining the flow resistance test result of the sample under test based on the flow rate value, the pressure difference, and the ratio.

[0091] In one embodiment, when the processor executes the computer program, it further performs the following steps: acquiring multiple flow resistance test results for multiple test samples, each test sample using the same porous material type but different specification parameters; and based on the flow resistance test results of each test sample, acquiring the average flow resistance test results of multiple flow resistance test results as the flow resistance test result of the porous material type.

[0092] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon. When executed by a processor, the computer program performs the following steps: obtaining the specifications of a sample under test; placing the sample under test into the front end of a flow resistivity tester and obtaining the flow rate value of a first cavity; obtaining a first air pressure value inside the first cavity in the middle section of the flow resistivity tester and obtaining a second air pressure value outside the flow resistivity tester; and obtaining the flow resistivity test result of the sample under test based on the flow rate value, the first air pressure value, the second air pressure value, and the specifications.

[0093] In one embodiment, the rear end of the flow resistance tester serves as the air inlet of the flow resistance tester, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester.

[0094] In one embodiment, the second pressure value is standard atmospheric pressure.

[0095] In one embodiment, the sample to be tested is a cylinder made of porous material, and when the computer program is executed by the processor, it also performs the following steps: obtaining the cylinder's base area and cylinder height as specification parameters of the sample to be tested.

[0096] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: obtaining a pressure difference value based on a first pressure value and a second pressure value; obtaining the ratio between the bottom area of ​​the cylinder and the height of the cylinder; and obtaining the flow resistance test result of the sample under test based on the flow rate value, the pressure difference, and the ratio.

[0097] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: acquiring multiple flow resistance test results for multiple test samples, each test sample using the same porous material type but different specification parameters; and based on the flow resistance test results of each test sample, acquiring the average flow resistance test results of multiple flow resistance test results as the flow resistance test result of the porous material type.

[0098] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps: acquiring the specification parameters of a sample to be tested; placing the sample to be tested into the front end of a flow resistivity tester and acquiring the flow rate value of a first cavity; acquiring a first air pressure value inside the first cavity in the middle section of the flow resistivity tester and acquiring a second air pressure value outside the flow resistivity tester; and acquiring the flow resistivity test result of the sample to be tested based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

[0099] In one embodiment, the rear end of the flow resistance tester serves as the air inlet of the flow resistance tester, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester.

[0100] In one embodiment, the second pressure value is standard atmospheric pressure.

[0101] In one embodiment, the sample to be tested is a cylinder made of porous material, and when the computer program is executed by the processor, it also performs the following steps: obtaining the cylinder's base area and cylinder height as specification parameters of the sample to be tested.

[0102] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: obtaining a pressure difference value based on a first pressure value and a second pressure value; obtaining the ratio between the bottom area of ​​the cylinder and the height of the cylinder; and obtaining the flow resistance test result of the sample under test based on the flow rate value, the pressure difference, and the ratio.

[0103] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: acquiring multiple flow resistance test results for multiple test samples, each test sample using the same porous material type but different specification parameters; and based on the flow resistance test results of each test sample, acquiring the average flow resistance test results of multiple flow resistance test results as the flow resistance test result of the porous material type.

[0104] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0105] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for testing flow resistivity, characterized in that, An application is made in a flow resistivity tester, the flow resistivity tester comprising a front end, a middle section, and a rear end, the front end, the middle section, and the rear end forming a connected cavity. The front end, the middle section, and the rear end are hollow cylinders of different diameters. The middle section has a cylindrical opening for arranging a first sensor, which reads a first air pressure value. The front end is used to place a sample to be tested, which divides the cavity into a first cavity and a second cavity. The first cavity includes the cavity at the rear end, the cavity at the middle section, and a portion of the front end. The second cavity includes another portion of the front end. The method includes: Obtain the specifications of the sample to be tested; The sample to be tested is placed into the front end of the flow resistance tester to obtain the flow rate value of the first cavity; A first air pressure value is obtained inside the first cavity in the middle section of the flow resistance tester, and a second air pressure value is obtained outside the flow resistance tester. The flow resistance test results of the sample under test are obtained based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters.

2. The method according to claim 1, characterized in that, The rear end of the flow resistance tester serves as the air inlet of the flow resistance tester, and the front end of the flow resistance tester serves as the air outlet of the flow resistance tester.

3. The method according to claim 1, characterized in that, The second air pressure value is standard atmospheric pressure.

4. The method according to claim 1, characterized in that, The sample to be tested is a cylinder made of porous material. Obtaining the specifications of the sample to be tested includes: The base area and height of the cylinder are obtained and used as the specification parameters of the sample to be tested.

5. The method according to claim 1, characterized in that, The step of obtaining the flow resistivity test result of the sample under test based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters includes: The pressure difference value is obtained based on the first air pressure value and the second air pressure value; Obtain the ratio between the base area of ​​the cylinder and the height of the cylinder; The flow resistance test results of the sample under test are obtained based on the flow rate value, the air pressure difference value, and the ratio value.

6. The method according to claim 1, characterized in that, The method further includes: Multiple flow resistivity test results were obtained for multiple test samples, each using the same porous material type but different specifications. Based on the flow resistance test results of each sample under test, the average flow resistance test results of multiple flow resistance test results are obtained as the flow resistance test result of the porous material type.

7. A flow resistivity testing system, characterized in that, The system includes: A flow resistivity tester includes a front end, a middle section, and a rear end. The front end, middle section, and rear end together form a connected cavity. The front end is used to place the sample to be tested and is connected to the atmosphere. The rear end is used to connect to a flow rate testing device. The front end, middle section, and rear end are hollow cylinders of different diameters. The middle section has a cylindrical opening for arranging a first sensor, which reads a first air pressure value. The sample to be tested is used to divide the cavity of the flow resistivity tester into a first cavity and a second cavity. The first cavity includes a cavity at the rear end of the flow resistivity tester, a cavity in the middle section of the flow resistivity tester, and a portion of a cavity at the front end of the flow resistivity tester. The second cavity includes another portion of a cavity at the front end of the flow resistivity tester. The flow rate testing device is connected to the back end of the flow resistance tester and is used to obtain the flow rate value of the first cavity; The flow rate testing device is also used to obtain a first air pressure value inside the first cavity in the middle section of the flow resistance tester, obtain a second air pressure value outside the flow resistance tester, and obtain the specification parameters of the sample to be tested. Based on the flow rate value, the first air pressure value, the second air pressure value, and the specification parameters, the flow resistance test result of the sample to be tested is obtained.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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