Method and device for testing noise of electric air outlet, electronic equipment and medium

Abstract

The invention discloses an electric air outlet noise testing method and device, electronic equipment and a medium, and relates to the technical field of vehicles. The method comprises the steps that blades of the electric air outlet assembly are controlled to execute an air sweeping action, noise signals are collected during the action period of the blades, and the electric air outlet assembly is installed at a test position in a target installation mode; the noise signal is analyzed to determine a total sound pressure level generated during blade action. According to the method, a repeatable and comparable noise evaluation system is established through standardized mounting and positioning, accurate acquisition of simulated human ear positions and energy analysis of blade complete action period noise signals, objective quantification of the acoustic quality of the electric air outlet is realized, a reliable technical basis is provided for part development and quality verification, and the method is suitable for popularization and application. The product noise control capability is significantly improved, and the technical problem that the industry lacks a unified standardized test scheme is effectively solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method for testing the noise of an electric air vent, a device for testing the noise of an electric air vent, a computer-readable storage medium, and an electronic device. Background Technology

[0002] With the continuous improvement of intelligence and comfort in the automotive industry, the performance optimization of the in-vehicle air conditioning system, as an important regulating device for the driving and riding environment, has become a key aspect of vehicle design. Electric air vents, with their motor-driven automatic adjustment capabilities, can achieve precise airflow control, significantly enhancing the user's interactive experience and the technological feel of the interior. Therefore, they are gradually replacing traditional manual air vents in high-end models.

[0003] However, the widespread use of this component has also brought new noise control challenges. The mechanical noise generated by the drive motor and transmission mechanism during operation, as well as the aerodynamic noise generated by the high-speed airflow turbulence after passing through the blades, are significantly amplified in modern cabins, especially electric vehicle cabins, where the quietness requirement is extremely high. This has become an important factor affecting the overall NVH (Noise, Vibration, and Harshness) performance of the vehicle.

[0004] Currently, the industry lacks a unified, efficient, and reproducible standard method for testing and evaluating the noise characteristics of electric air vents. This technological gap makes it difficult to effectively control and objectively compare the acoustic quality of components during the development and quality verification stages. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art. To this end, the first objective of this application is to propose a method for testing the noise of an electric air outlet. The method includes: determining a target installation method for the electric air outlet assembly based on the testing requirements, wherein the electric air outlet assembly is installed at the test position in the target installation method; controlling the blades of the electric air outlet assembly to perform a sweeping action, and collecting noise signals during the blade action; analyzing the noise signals to determine the total sound pressure level generated during the blade action. This application establishes a repeatable and comparable noise evaluation system through standardized installation positioning, precise acquisition simulating the position of the human ear, and energy analysis of the noise signal during the complete blade action cycle. This achieves objective quantification of the acoustic quality of the electric air outlet, provides a reliable technical basis for component development and quality verification, significantly improves product noise control capabilities, and effectively solves the technical problem of the lack of a unified standardized testing scheme in the industry.

[0006] The second objective of this application is to provide a testing device for the noise of an electric air outlet.

[0007] The third objective of this application is to provide a computer-readable storage medium.

[0008] The fourth objective of this application is to propose an electronic device.

[0009] To achieve the above objectives, the first aspect of this application proposes a method for testing the noise of an electric air outlet. The method includes: determining a target installation method for the electric air outlet assembly based on the testing requirements for the electric air outlet noise, wherein the electric air outlet assembly is installed at the test position in the target installation method; controlling the blades of the electric air outlet assembly to perform a sweeping action, and collecting noise signals during the blade action; and analyzing the noise signals to determine the total sound pressure level generated during the blade action.

[0010] According to one embodiment of this application, analyzing a noise signal to determine the total sound pressure level generated during blade movement includes: extracting a target noise signal segment, wherein the target noise signal segment is used to characterize the noise signal segment from the start of blade movement to the end of movement; performing digital A-weighted filtering on the target noise signal segment to obtain an A-weighted sound pressure time series; calculating the root mean square value of the A-weighted sound pressure time series, and determining the total sound pressure level generated during blade movement based on the root mean square value and a reference sound pressure.

[0011] According to one embodiment of this application, the target installation method includes independent suspension installation.

[0012] According to one embodiment of this application, the target installation method includes dashboard integrated installation.

[0013] According to one embodiment of this application, the lower surface of the air outlet assembly is at a preset height from the ground.

[0014] According to one embodiment of this application, noise signals are collected by a microphone, wherein the axis of the microphone is parallel to the air outlet direction.

[0015] According to one embodiment of this application, the above method further includes: controlling the blades of the electric air outlet assembly to perform a preset number of sweeping actions.

[0016] To achieve the above objectives, a second aspect of this application provides a testing device for the noise of an electric air outlet. The device includes: a first determining module, used to determine the target installation method of the electric air outlet assembly according to the testing requirements of the electric air outlet noise, wherein the electric air outlet assembly is installed at the test position in the target installation method; a control module, used to control the blades of the electric air outlet assembly to perform a sweeping action; a data acquisition module, used to acquire noise signals during the blade movement; and a second determining module, used to analyze the noise signals to determine the total sound pressure level generated during the blade movement.

[0017] To achieve the above objectives, a third aspect of this application provides a computer-readable storage medium storing a test program for electric air outlet noise, which, when executed by a processor, implements the aforementioned test method for electric air outlet noise.

[0018] To achieve the above objectives, a fourth aspect of this application provides an electronic device, including a memory, a processor, and a test program for electric air outlet noise stored in the memory and executable on the processor. When the processor executes the test program for electric air outlet noise, it implements the aforementioned test method for electric air outlet noise.

[0019] The present application discloses a method, apparatus, electronic device, and medium for testing the noise of an electric air outlet. Based on the testing requirements, a target installation method for the electric air outlet assembly is determined, wherein the electric air outlet assembly is installed at the test position according to the target installation method. The blades of the electric air outlet assembly are controlled to perform a sweeping action, and noise signals are collected during the blade action. The noise signals are analyzed to determine the total sound pressure level generated during the blade action. This application establishes a repeatable and comparable noise evaluation system through standardized installation positioning, precise acquisition simulating the position of the human ear, and energy analysis of the noise signal during the complete blade action cycle. This achieves objective quantification of the acoustic quality of the electric air outlet, provides a reliable technical basis for component development and quality verification, significantly improves product noise control capabilities, and effectively solves the technical problem of the lack of a unified standardized testing scheme in the industry. Attached Figure Description

[0020] Figure 1 This is a flowchart of a method for testing the noise of an electric air outlet according to some embodiments of this application; Figure 2 This is a schematic diagram showing the placement of a microphone according to some embodiments of this application; Figure 3 This is a schematic diagram showing the variation of the sound pressure level of the electric air outlet assembly with the air conditioning compressor speed according to some embodiments of this application; Figure 4 This is a block diagram of a test apparatus for electric air outlet noise according to some embodiments of this application; Figure 5 This is a block diagram of an electronic device according to some embodiments of this application. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0022] The following describes in detail, with reference to the accompanying drawings, the testing method, apparatus, electronic equipment, and medium for the noise of the electric air outlet according to embodiments of this application.

[0023] Figure 1 This is a flowchart of a method for testing the noise of an electric air outlet according to some embodiments of this application. (Refer to...) Figure 1 The method for testing the noise of the electric air outlet in this application embodiment may include the following steps: S110, the target installation method of the electric air outlet assembly is determined according to the test requirements of the electric air outlet noise, wherein the electric air outlet assembly is installed at the test position in the target installation method.

[0024] Specifically, when conducting noise testing on the electric air vent assembly, the installation method can be determined based on the testing requirements. For example, when testing the noise of a single electric air vent assembly, an independent suspension mounting method (target mounting method) can be used to install the electric air vent assembly at the test location; when testing the noise of the electric air vent assembly in the vehicle assembly state, an instrument panel integrated mounting method (target mounting method) can be used to install the electric air vent assembly at the test location.

[0025] To further illustrate the above embodiments, in this application, the target installation methods include independent suspension installation and dashboard integrated installation. Specifically, independent suspension installation refers to suspending the electric air vent assembly at the test position using elastic ropes, while dashboard integrated installation refers to installing the electric air vent assembly on the dashboard assembly according to the vehicle assembly requirements, ensuring that the assembly clearance and tightening torque meet the design specifications. The suspension state more easily characterizes the noise level of individual components, while the vehicle assembly state takes into account the noise influence caused by the vehicle body structure.

[0026] To further illustrate the above embodiments, in this application embodiment, the lower surface of the air outlet assembly is at a preset height from the ground. This preset height can be determined according to actual conditions; for example, it can be (1 ± 0.05) m. This achieves consistency between the test conditions and the simulated relative position of the human ear in the actual vehicle usage environment. This setting ensures that the directivity and distance parameters of the noise signal acquisition meet ergonomic requirements, thereby effectively improving the correlation between noise test results and the subjective perception of drivers and passengers, and enhancing the authenticity and engineering guidance value of the test data.

[0027] S120 controls the blades of the electric air outlet assembly to perform a sweeping action and collects noise signals during the blade movement.

[0028] Specifically, after installing the electric air outlet assembly to the test position according to the target installation method and correctly connecting the low-voltage power supply harness and control signal interface, control the blades of the electric air outlet assembly to perform the sweeping action.

[0029] For example, when the electric air outlet assembly is installed at the test position in an independent suspension manner, ensure that it does not swing left or right during operation, and then control the air outlet to start free sweeping; when the electric air outlet assembly is installed at the test position in an instrument panel integrated manner, ensure that the assembly clearance and fastening torque meet the design specifications, and then control the air outlet to start free sweeping.

[0030] Furthermore, noise signals can be collected via a microphone during blade movement. To further illustrate the above embodiments, in this embodiment, noise signals are collected via a microphone, wherein the axis of the microphone is parallel to the air outlet direction.

[0031] For example, the microphone is positioned as follows Figure 2 As shown. Specifically, the microphone needs to simulate the position of the human ear, positioned at (45 ± 0.5)° obliquely above the geometric center of the air outlet surface, at a distance of (1 ± 0.02) m from the geometric center of the air outlet surface, and the microphone axis is parallel to the air outlet direction. In this way, the noise characteristics actually perceived by the human ear can be accurately captured, eliminating measurement errors caused by the deviation of the pickup position, ensuring the spatial directivity and directional consistency of the noise signal acquisition, and making the test results highly consistent with the subjective auditory experience.

[0032] S130 analyzes the noise signal to determine the total sound pressure level generated during blade movement.

[0033] Specifically, after collecting the noise signal, the noise signal is analyzed. For example, the average noise level of the blades of the electric air outlet assembly during the entire operating cycle is calculated. The entire operating cycle refers to the complete process from the start of the blade movement to the completion of the preset sweeping mode and the return to the initial position or stop. Then, the total sound pressure level generated during the blade movement is determined based on the average noise level. For example, the sound pressure level corresponding to the current average noise level can be determined by looking up a preset mapping table between the noise value and the total sound pressure level.

[0034] To further illustrate the above embodiments, in this application embodiment, the noise signal is analyzed to determine the total sound pressure level generated during blade movement, including: extracting a target noise signal segment, wherein the target noise signal segment is used to characterize the noise signal segment from the start of blade movement to the end of movement; performing digital A-weighted filtering on the target noise signal segment to obtain an A-weighted sound pressure time series; calculating the root mean square value of the A-weighted sound pressure time series, and determining the total sound pressure level generated during blade movement based on the root mean square value and the reference sound pressure.

[0035] Specifically, to ensure the analyzed signal corresponds perfectly with the noise source (blade movement) in time and eliminate irrelevant noise interference, noise data needs to be extracted between the instant the blade begins to move (starting point) and the instant it comes to a complete stop (ending point). Since the human ear has varying sensitivities to different frequencies, being most sensitive to mid-to-high frequencies (e.g., 1000-5000 Hz) and insensitive to low frequencies, A-weighting is a standard filter that attenuates the energy of low-frequency sounds. This allows the processed signal to better reflect the perceived loudness to the human ear when calculating the sound level. Therefore, after extracting the target noise signal segment, a digital A-weighting filter is used to perform digital A-weighting filtering on the target noise signal segment to obtain an A-weighted sound pressure time series. Then, the root mean square (RMS) operation is performed on the A-weighted sound pressure time series, which essentially calculates the average energy of the sound pressure within that time period. Finally, the RMS value and the reference sound pressure are input into the following formula to calculate the total sound pressure level generated during blade movement:

[0036] in, Indicates the total sound pressure level; Represents the root mean square value; This represents the reference sound pressure level.

[0037] In this way, noise signals are accurately collected based on the actual hearing position and direction of the human ear. Combined with A-weighted filtering and energy averaging processing of the target noise segment within the complete blade movement cycle, the A-weighted total sound pressure level is finally output in decibels. This achieves an objective, repeatable, and consistent scientific evaluation of the noise level of the electric air outlet, providing a reliable basis for product noise quality control, design optimization, and production consistency testing, and significantly improving the engineering applicability and standardization of the test results.

[0038] In this embodiment, the blades of the electric air outlet assembly are controlled to perform a preset number of sweeping actions. The preset number of actions can be determined according to actual conditions; for example, it can be three times, but no specific limitation is made here.

[0039] For example, when controlling the blades of the electric air outlet assembly to perform a sweeping action, the blades of the electric air outlet assembly can be controlled to perform three sweeping actions to calculate the total sound pressure level three times. The average of the three total sound pressure levels is then used as the test result for this test, which can improve the accuracy of the test.

[0040] In some embodiments, after the test is completed, a test report on the noise of the electric air outlet will be generated. The test report includes the test time, location, test personnel, test results, and result analysis.

[0041] As a concrete example, refer to Figure 3 Four damping pad arrangement schemes were set up, such as full coverage, partial coverage (removing damping pads near the air duct), damping pads covering the motor, and no damping pads covering the motor (restoring the original state). The noise of the electric air outlet was tested using the above method at different air conditioner speeds to obtain the total sound pressure level corresponding to each damping pad arrangement scheme.

[0042] In summary, this application establishes a repeatable and comparable noise evaluation system through standardized installation positioning, precise acquisition simulating human ear position, and energy analysis of noise signals from the complete blade movement cycle. This achieves objective quantification of the acoustic quality of the electric air outlet, provides a reliable technical basis for component development and quality verification, significantly improves product noise control capabilities, and effectively solves the technical problem of the lack of a unified standardized testing scheme in the industry.

[0043] Corresponding to the above embodiments, this application also proposes a testing device for the noise of an electric air outlet.

[0044] Reference Figure 4 The electric air outlet noise testing device 200 includes: a first determining module 210, a control module 220, a data acquisition module 230, and a second determining module 240.

[0045] The first determining module 210 is used to determine the target installation method of the electric air outlet assembly according to the test requirements for the electric air outlet noise, wherein the electric air outlet assembly is installed at the test position in the target installation method. The control module 220 is used to control the blades of the electric air outlet assembly to perform a sweeping action. The acquisition module 230 is used to acquire noise signals during the blade movement. The second determining module 240 is used to analyze the noise signals to determine the total sound pressure level generated during the blade movement.

[0046] According to one embodiment of this application, the second determining module 240 is specifically used to: extract a target noise signal segment, wherein the target noise signal segment is used to characterize the noise signal segment from the start of blade movement to the end of movement; perform digital A-weighted filtering on the target noise signal segment to obtain an A-weighted sound pressure time series; calculate the root mean square value of the A-weighted sound pressure time series, and determine the total sound pressure level generated during blade movement based on the root mean square value and the reference sound pressure.

[0047] According to one embodiment of this application, the target installation method includes independent suspension installation.

[0048] According to one embodiment of this application, the target installation method includes dashboard integrated installation.

[0049] According to one embodiment of this application, the lower surface of the air outlet assembly is at a preset height from the ground.

[0050] According to one embodiment of this application, the acquisition module 230 is specifically used to acquire noise signals through a microphone, wherein the axis of the microphone is parallel to the air outlet direction.

[0051] According to one embodiment of this application, the control module 220 is further configured to control the blades of the electric air outlet assembly to perform a preset number of sweeping actions.

[0052] Corresponding to the above embodiments, this application also proposes a computer-readable storage medium.

[0053] The computer-readable storage medium of this application stores a test program for electric air outlet noise, which, when executed by a processor, implements the aforementioned test method for electric air outlet noise.

[0054] It should be noted that the above-described embodiments and explanations of the beneficial effects of the test method for the noise of the electric air outlet are also applicable to the computer-readable storage medium of the embodiments of this application. To avoid redundancy, they will not be elaborated in detail here.

[0055] Corresponding to the above embodiments, this application also proposes an electronic device.

[0056] See Figure 5 As shown, the electronic device 300 of this application includes a memory 310, a processor 320, and a test program for electric air outlet noise stored in the memory 310 and run on the processor 320. When the processor executes the test program for electric air outlet noise, it implements the aforementioned test method for electric air outlet noise.

[0057] It should be noted that the above-described embodiments and explanations of the beneficial effects of the test method for the noise of the electric air outlet are also applicable to the electronic devices in the embodiments of this application. To avoid redundancy, they will not be elaborated in detail here.

[0058] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0059] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for testing the noise of an electric air outlet, characterized in that, The method includes: The target installation method for the electric air outlet assembly is determined based on the test requirements for the noise of the electric air outlet, wherein the electric air outlet assembly is installed at the test position in the target installation method. The blades of the electric air outlet assembly are controlled to perform a sweeping action, and a noise signal is collected during the blade action. The noise signal is analyzed to determine the total sound pressure level generated during the blade movement.

2. The method for testing the noise of an electric air outlet according to claim 1, characterized in that, Analyzing the noise signal to determine the total sound pressure level generated during the blade's movement includes: Extracting a target noise signal segment, wherein the target noise signal segment is used to characterize the noise signal segment from the start of the blade's movement to the end of the movement; The target noise signal segment is subjected to digital A-weighted filtering to obtain an A-weighted sound pressure time series; Calculate the root mean square value of the A-weighted sound pressure time series, and determine the total sound pressure level generated during the blade operation based on the root mean square value and the reference sound pressure.

3. The method for testing the noise of an electric air outlet according to claim 1, characterized in that, The target installation method includes independent suspension installation.

4. The method for testing the noise of an electric air outlet according to claim 1, characterized in that, The target installation method includes dashboard integrated installation.

5. The method for testing the noise of an electric air outlet according to claim 3 or 4, characterized in that, The lower surface of the air outlet assembly is at a preset height from the ground.

6. The method for testing the noise of an electric air outlet according to claim 1, characterized in that, Acquire noise signals, including: The noise signal is collected by a microphone, wherein the axis of the microphone is parallel to the air outlet direction.

7. The method for testing the noise of an electric air outlet according to claim 1, characterized in that, The method further includes: The blades of the electric air outlet assembly are controlled to perform a preset number of sweeping actions.

8. A testing device for the noise of an electric air outlet, characterized in that, The device includes: The first determining module is used to determine the target installation method of the electric air outlet assembly according to the test requirements of the electric air outlet noise, wherein the electric air outlet assembly is installed at the test position in the target installation method. The control module is used to control the blades of the electric air outlet assembly to perform the sweeping action; Acquisition module for acquiring noise signals during blade movement; The second determining module is used to analyze the noise signal to determine the total sound pressure level generated during the blade movement.

9. A computer-readable storage medium, characterized in that, It stores a test program for the noise of an electric air outlet, which, when executed by a processor, implements the test method for the noise of an electric air outlet according to any one of claims 1-7.

10. An electronic device, characterized in that, The device includes a memory, a processor, and a test program for electric air outlet noise stored in the memory and executable on the processor. When the processor executes the test program for electric air outlet noise, it implements the test method for electric air outlet noise according to any one of claims 1-7.

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