Method and device for measuring contribution of noise of air inlet pipe opening to noise in vehicle

Abstract

The invention provides a method and device for measuring contribution of noise of an air inlet pipe opening to noise in a vehicle, and the method comprises the steps: arranging a noise generator in an air filter of a test vehicle, and arranging a plurality of sound pressure sensors in the test vehicle according to a noise measurement point arrangement strategy; controlling the test vehicle and the noise generator according to a first preset test strategy of the test vehicle, and acquiring first sound pressure information of the test vehicle through the sound pressure sensor; preprocessing the first sound pressure information to obtain the main order of the noise of the vehicle air inlet pipe orifice, and generating a target test strategy according to the main order; controlling the test vehicle and the noise generator according to the target test strategy, and obtaining second sound pressure information of the test vehicle through the sound pressure sensor; the second sound pressure information is analyzed and calculated, and the contribution of the noise of the vehicle air inlet pipe opening to the noise in the vehicle is generated. Therefore, the air inlet noise contribution can be accurately quantified, and a reliable data basis is provided for optimizing the NVH performance of the air inlet system and setting the target line of the air inlet noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of NVH testing, and in particular to a method and device for measuring the contribution of intake pipe noise to in-vehicle noise, an electronic device, a computer readable storage medium, and a computer program product. BACKGROUND

[0002] In vehicle NVH (Noise, Vibration, and Harshness) development, the intake system is a key contributor to vehicle exterior acceleration noise. However, the engine compartment is compact and the sound sources are severely coupled, and the intake noise is often mixed with exhaust and mechanical noise, making it difficult to separate and quantify the intake noise from the complex mixed noise, which has been a difficulty in the field of NVH testing.

[0003] Existing technologies are difficult to balance precision and efficiency. Simple techniques such as near-field sound pressure methods have large errors and are difficult to refine frequencies and orders, while more precise four-load source feature extraction methods require multiple mechanical loads and repeated disassembly, which is time-consuming and costly, and is difficult to quickly reuse at different stages of the project. Therefore, the industry needs a testing method that does not require changes to the engine operating conditions and can quantify the contribution of intake noise to in-vehicle noise by order. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art.

[0005] To this end, a first object of the present application is to provide a method for measuring the contribution of intake pipe noise to in-vehicle noise, which can accurately quantify the contribution of intake noise, providing a reliable data basis for optimizing the NVH performance of the intake system and setting the target line for intake noise.

[0006] A second object of the present application is to provide a device for measuring the contribution of intake pipe noise to in-vehicle noise.

[0007] A third object of the present application is to provide an electronic device.

[0008] A fourth object of the present application is to provide a computer readable storage medium.

[0009] A fifth object of the present application is to provide a computer program product.

[0010] To achieve the above object, the first aspect of the present application provides a method for measuring the contribution of intake pipe mouth noise to vehicle interior noise, comprising the following steps: setting a noise generator in the air filter of a test vehicle, and arranging a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy; controlling the test vehicle and the noise generator according to a first preset test strategy of the test vehicle, so as to obtain first sound pressure information of the test vehicle through the plurality of sound pressure sensors; preprocessing the first sound pressure information to obtain the main order of the vehicle intake pipe mouth noise, and generating a target test strategy according to the main order of the vehicle intake pipe mouth noise; controlling the test vehicle and the noise generator according to the target test strategy, so as to obtain second sound pressure information of the test vehicle through the plurality of sound pressure sensors; analyzing and calculating the second sound pressure information to generate the contribution of the vehicle intake pipe mouth noise to the vehicle interior noise.

[0011] According to the method for measuring the contribution of intake pipe mouth noise to vehicle interior noise provided by the embodiments of the present application, first, a noise generator is set in the air filter of a test vehicle, and a plurality of sound pressure sensors are arranged in the test vehicle according to a preset noise measurement point arrangement strategy; second, the test vehicle and the noise generator are controlled according to a first preset test strategy of the test vehicle, so as to obtain first sound pressure information of the test vehicle through the plurality of sound pressure sensors; then, the first sound pressure information is preprocessed to obtain the main order of the vehicle intake pipe mouth noise, and a target test strategy is generated according to the main order of the vehicle intake pipe mouth noise; then, the test vehicle and the noise generator are controlled based on the target test strategy, so as to obtain second sound pressure information of the test vehicle through the plurality of sound pressure sensors; finally, the second sound pressure information is analyzed and calculated to generate the contribution of the vehicle intake pipe mouth noise to the vehicle interior noise. Therefore, the contribution of intake noise can be accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting the target line of intake noise.

[0012] In addition, the method for measuring the contribution of intake pipe mouth noise to vehicle interior noise according to the above embodiments of the present application can have the following additional technical features: In an embodiment of the present application, the plurality of sound pressure sensors include a first sound pressure sensor, a second sound pressure sensor, a third sound pressure sensor and a fourth sound pressure sensor, and the plurality of sound pressure sensors are arranged in the test vehicle according to the preset noise measurement point arrangement strategy, including: setting the first sound pressure sensor at the opening of the engine intake pipe of the test vehicle; setting the second sound pressure sensor at a first preset distance in the longitudinal axis direction of the test vehicle cabin front wall; setting the third sound pressure sensor at a second preset distance of the test vehicle bellows near field; and setting the fourth sound pressure sensor in the test vehicle driver cabin.

[0013] In an embodiment of the present application, according to the first preset test strategy of the test vehicle, the test vehicle and the noise generator are controlled to obtain the first sound pressure information of the test vehicle through the plurality of sound pressure sensors, comprising: analyzing the first preset test strategy to determine a plurality of test working conditions of the test vehicle, and obtaining the vehicle control strategy and the noise generator control strategy corresponding to each test working condition in the plurality of test working conditions; and controlling the test vehicle and the noise generator according to the vehicle control strategy and the noise generator control strategy corresponding to each test working condition respectively to obtain the first sound pressure information of the test vehicle in each test working condition through the plurality of sound pressure sensors.

[0014] In an embodiment of the present application, the sound pressure information is preprocessed to obtain the main order of the vehicle intake pipe mouth noise, comprising: processing the first sound pressure information based on the processing software to generate first noise data; analyzing the first noise data to obtain noise data corresponding to each test working condition, and calculating the main order of the vehicle intake pipe mouth noise according to the noise data corresponding to each test working condition.

[0015] In an embodiment of the present application, the main order of the vehicle intake pipe mouth noise is calculated according to the noise data corresponding to each test working condition, comprising: processing the noise data corresponding to each test working condition respectively to generate a noise sound pressure curve corresponding to each test working condition; and calculating the main order of the vehicle intake pipe mouth noise according to the noise sound pressure curve corresponding to each test working condition.

[0016] In an embodiment of the present application, the vehicle model information of the test vehicle is obtained, and the vehicle model information and the contribution are stored in the database.

[0017] To achieve the above-mentioned purpose, the second aspect embodiment of the present application provides a device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise, comprising: a layout module, configured to set a noise generator in the air filter of a test vehicle, and arrange a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point layout strategy; a first acquisition module, configured to control the test vehicle and the noise generator according to a first preset test strategy of the test vehicle to obtain first sound pressure information of the test vehicle through the plurality of sound pressure sensors; a preprocessing module, configured to preprocess the first sound pressure information to obtain the main order of the vehicle intake pipe mouth noise, and generate a target test strategy according to the main order of the vehicle intake pipe mouth noise; a second acquisition module, configured to control the test vehicle and the noise generator according to the target test strategy to obtain second sound pressure information of the test vehicle through the plurality of sound pressure sensors; and an analysis and calculation module, configured to analyze and calculate the second sound pressure information to generate the contribution of the vehicle intake pipe mouth noise to the vehicle interior noise.

[0018] The device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to the embodiment of the present application firstly sets a noise generator in the air filter of the test vehicle through the arrangement module, and arranges a plurality of sound pressure sensors in the test vehicle according to a preset noise measuring point arrangement strategy; secondly, the first acquisition module controls the test vehicle and the noise generator according to a first preset test strategy of the test vehicle, and acquires first sound pressure information of the test vehicle through the plurality of sound pressure sensors; then, the preprocessing module pre-processes the first sound pressure information to obtain main orders of the vehicle intake pipe mouth noise, so as to generate a target test strategy; subsequently, the second acquisition module controls the test vehicle and the noise generator according to the target test strategy, so as to acquire second sound pressure information of the test vehicle through the plurality of sound pressure sensors; finally, the analysis and calculation module analyzes and calculates the second sound pressure information to generate the contribution of the vehicle intake pipe mouth noise to the vehicle interior noise. In this way, the contribution of the intake noise can be accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting a target line of the intake noise.

[0019] To achieve the above object, the third aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, any of the above methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented.

[0020] According to the electronic device of the embodiment of the present application, when the processor executes the computer program, any of the above methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented, and the contribution of the intake noise is accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting a target line of the intake noise.

[0021] To achieve the above object, the fourth aspect of the present application provides a computer readable storage medium having a computer program stored thereon, and the program is executed by a processor to implement any of the above methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise.

[0022] According to the computer readable storage medium of the embodiment of the present application, when the computer program stored thereon is executed by the processor, any of the above methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented, and based on the above method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise, the contribution of the intake noise is accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting a target line of the intake noise.

[0023] To achieve the above object, the fifth aspect of the present application provides a computer program product comprising a computer program, and when the computer program is executed by a processor, any of the above methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented.

[0024] According to the computer program product of the embodiments of the present application, when the computer program is executed, the method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is realized, and based on the method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise, the precise quantification of the intake noise contribution is realized, which provides a reliable data basis for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0025] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein: Figure 1 A flowchart of the method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to some embodiments of the present application; Figure 2 A flowchart of the method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to one specific embodiment of the present application; Figure 3 A block diagram of the device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to some embodiments of the present application; and Figure 4 A structural diagram of an electronic device according to some embodiments of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by way of example are intended to explain the present application, and should not be understood as limiting the present application.

[0028] The method, device, electronic device, computer readable storage medium and computer program product for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to the embodiments of the present application are described below with reference to the accompanying drawings.

[0029] The method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise provided by the embodiments of the present application can be executed by an electronic device, which can be a mobile phone, a tablet computer, a palmtop computer or a server, etc., which is not limited here.

[0030] In the embodiment of the present application, the electronic device can be provided with a processing component, a storage component and a driving component. Optionally, the driving component and the processing component can be integrally arranged, and the storage component can store an operating system, an application program or other program modules, and the processing component can implement the method for measuring the contribution of the intake pipe noise to the vehicle interior noise by executing the application program stored in the storage component.

[0031] As shown in Figure 1 the method for measuring the contribution of the intake pipe noise to the vehicle interior noise of the present application can include the following steps: Step S1, a noise generator is arranged in the air filter of the test vehicle, and a plurality of sound pressure sensors are arranged in the test vehicle according to a noise measurement point arrangement strategy. The noise measurement point arrangement strategy can be calibrated according to actual conditions.

[0032] It should be noted that the noise generator described in this embodiment needs to be pre-calibrated in a free sound field before installation to ensure that it can output a preset sound pressure level excitation signal under a specified voltage drive. When installing, in order to avoid excitation signal attenuation or additional airflow noise caused by sound wave leakage, the noise generator is preferably tightly fixed in the internal cavity of the air filter to ensure that the excitation sound wave can fully couple into the intake airflow and propagate along the intake pipe. After installation, the sealing of the noise generator and the air filter shell should be checked again.

[0033] Step S2, according to a first preset test strategy of the test vehicle, the test vehicle and the noise generator are controlled to obtain first sound pressure information of the test vehicle through the plurality of sound pressure sensors. The first preset test strategy can be calibrated according to actual conditions.

[0034] Specifically, the first preset test strategy is a comprehensive control scheme designed for measuring the contribution of the intake pipe noise, and its core function is to clarify the cooperative work requirements of the test vehicle and the noise generator. When executing the test method, according to the unified instructions of the first preset test strategy, the operating parameters (such as speed, load, etc.) of the test vehicle and the output parameters of the noise generator are synchronously controlled to ensure that the test environment meets the preset conditions. On this basis, through the plurality of sound pressure sensors arranged in the vehicle and the related positions, the sound pressure data in the test process is collected in real time to form the first sound pressure information, which provides basic data support for subsequent calculation of the noise contribution.

[0035] Step S3, the first sound pressure information is preprocessed to obtain the main order of the vehicle intake pipe noise, and a target test strategy is generated according to the main order of the vehicle intake pipe noise.

[0036] Specifically, the first sound pressure information obtained in step S2 is pre-processed, that is, the interference components in the data are removed through data analysis and feature extraction, and the noise frequency components with the highest contribution ratio and the most significant influence on the vehicle interior noise are screened and located from the wide frequency noise background, that is, the main order of the intake pipe noise, and after obtaining the main order, a target test strategy is formulated based on the above main order, which focuses on the noise characteristics of the main order, and the subsequent test is concentrated on these identified and limited main orders.

[0037] Step S4, according to the target test strategy, the test vehicle and the noise generator are controlled to obtain the second sound pressure information of the test vehicle through the multiple sound pressure sensors.

[0038] Specifically, the target test strategy is a targeted scheme formulated based on the main order of the intake pipe noise identified in step S3, and the core is to focus on the key noise components and improve the test accuracy. When executing, according to the preset requirements of the target test strategy, the running state of the test vehicle and the output parameters (such as frequency, intensity, etc.) of the noise generator are synchronously controlled to ensure that the two work together to match the noise test requirements of the main order. Under this premise, the sound pressure data in the test process is continuously collected through multiple sound pressure sensors to form the second sound pressure information, which will correspond to the first sound pressure information obtained in step S2, and provide key comparison data for subsequent calculation of the contribution of the intake pipe noise to the vehicle interior noise.

[0039] Step S5, analyzing and calculating the second sound pressure information to generate the contribution of the vehicle intake pipe noise to the vehicle interior noise.

[0040] Specifically, the preferred embodiment of the present embodiment is adopted. First, under the same vehicle running state, the sound pressure level data of the target position (such as the driver's inner ear) in the vehicle when the noise generator is turned on (emits a single frequency signal corresponding to the main order of the intake pipe noise identified in step S3) and turned off are extracted respectively. Subsequently, by calculating the difference between the sound pressure levels under the above two conditions, or by analyzing the transmission relationship of sound energy, the vehicle interior noise increment caused by the intake pipe order noise is directly separated, and the increment is the contribution of the order intake pipe noise to the vehicle interior noise under the specific working condition.

[0041] The embodiment first sets a noise generator in the air filter of the test vehicle, and arranges a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy, then controls the test vehicle and the noise generator according to a first preset test strategy of the test vehicle, acquires first sound pressure information of the test vehicle through the plurality of sound pressure sensors, then pre-processes the first sound pressure information to obtain main orders of the vehicle air inlet pipe noise, thereby generating a target set test strategy, then controls the test vehicle and the noise generator based on the target set test strategy to acquire second sound pressure information of the test vehicle through the plurality of sound pressure sensors, and finally analyzes and calculates the second sound pressure information to generate a contribution of the vehicle air inlet pipe noise to the vehicle interior noise. Thus, the contribution of the air inlet noise can be accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the air inlet system and setting a target line of the air inlet noise.

[0042] In some embodiments of the present application, the plurality of sound pressure sensors can include a first sound pressure sensor, a second sound pressure sensor, a third sound pressure sensor and a fourth sound pressure sensor, and arranging the plurality of sound pressure sensors in the test vehicle according to the preset noise measurement point arrangement strategy can include: setting the first sound pressure sensor at an opening of an engine air inlet pipe of the test vehicle; setting the second sound pressure sensor at a first preset distance in a longitudinal axis direction of a cabin front wall of the test vehicle; setting the third sound pressure sensor at a second preset distance of a bellows near field of the test vehicle; and setting the fourth sound pressure sensor in a driver cabin of the test vehicle.

[0043] Specifically, to further accurately capture the transmission path of the noise, preferably, the preset noise measurement point arrangement strategy should achieve full-link noise collection of “air inlet pipe noise source-transmission path-vehicle interior receiving end”. The first sound pressure sensor is set at the opening of the engine air inlet pipe to directly collect the original noise signal of the air inlet pipe, and this position is the starting point of the noise source, which can obtain the initial sound pressure data without transmission attenuation, thereby providing a reference for subsequent judgment of the noise source strength; the second sound pressure sensor is arranged at the first preset distance in the longitudinal axis direction of the cabin front wall, which is located on the key path of the air inlet pipe noise transmission to the driver cabin, and can capture the sound pressure change of the noise when it propagates in the cabin, reflecting the attenuation or enhancement characteristics in the transmission process; the third sound pressure sensor is set at the second preset distance of the bellows near field, and the bellows is a flexible connecting component of the air inlet pipe and is an important node of noise transmission, and the data collected at this position can reflect the noise radiation of the key component; and the fourth sound pressure sensor is set in the driver cabin of the test vehicle, such as the corresponding position of the inner ear of the driver and the corresponding position of the inner ear of the front passenger, to directly simulate and measure the final noise level actually perceived by the vehicle occupants.

[0044] Through the cooperative arrangement of the above four key measuring points, full coverage from the noise source, the transmission path to the receiving end in the vehicle is realized, and it is ensured that the sound pressure information collected by multiple sound pressure sensors can form a complete data chain, thereby providing reliable data support for the subsequent accurate acquisition of the first sound pressure information and the second sound pressure information and the contribution calculation.

[0045] In some embodiments of the present application, according to the first preset test strategy of the test vehicle, the test vehicle and the noise generator are controlled to acquire the first sound pressure information of the test vehicle through the multiple sound pressure sensors, which can include: analyzing the first preset test strategy to determine multiple test working conditions of the test vehicle, and acquiring the vehicle control strategy and the noise generator control strategy corresponding to each test working condition in the multiple test working conditions; according to the vehicle control strategy and the noise generator control strategy corresponding to each test working condition respectively, the test vehicle and the noise generator are controlled to acquire the first sound pressure information of the test vehicle in each test working condition through the multiple sound pressure sensors.

[0046] Specifically, after analyzing the first preset test strategy, the determined multiple test working conditions should cover acoustic environments from simple to complex, for example, can include one or more of a static working condition, a hot engine idle working condition, a stationary working condition and a whole vehicle acceleration working condition. Among them, the static working condition is the basic preferred working condition, in which the vehicle is controlled to keep the engine not started, the vehicle is powered on, the noise generator is controlled to emit a broadband white noise, and / or is kept closed to collect background noise. In this condition, the background noise is the lowest, which is most conducive to accurate transmission path analysis.

[0047] When each test working condition is executed, the test vehicle is regulated into a target operating state according to the corresponding vehicle control strategy, and the noise generator is started to output a preset signal according to the noise generator control strategy, and after both of them enter the target state, the sound pressure data in this working condition is synchronously collected through the multiple sound pressure sensors arranged above, to form the first sound pressure information corresponding to this working condition.

[0048] In some embodiments of the present application, the sound pressure information is preprocessed to obtain the main order of the vehicle intake pipe noise, which can include: processing the first sound pressure information based on a preset processing software to generate first noise data; analyzing the first noise data to obtain noise data corresponding to each test working condition, and calculating the main order of the vehicle intake pipe noise according to the noise data corresponding to each test working condition. Among them, the preset processing software can be calibrated according to the actual situation.

[0049] Specifically, when the first sound pressure information is processed based on the preset processing software, the preset processing software can be a professional tool commonly used in the field of noise signal analysis (such as LMS Test.Lab, Matlab, etc.), and in this embodiment, the processing flow can include operations such as data filtering, detrending, signal smoothing, and outlier rejection, and finally generates standardized and high-credibility first noise data, providing a high-quality data basis for subsequent analysis.

[0050] When the first noise data is analyzed, the first noise data is split in combination with the aforementioned multiple test conditions to clearly distinguish the independent noise data set corresponding to each test condition, that is, the complete noise data collected by the multiple sound pressure sensors under each test condition after preprocessing. Subsequently, for the noise data corresponding to each condition, the frequency characteristics of the intake pipe mouth noise are analyzed and calculated, and preferably, the noise intensity corresponding to each frequency component can be identified through frequency spectrum analysis, order tracking, etc., and the frequency order that is high in energy ratio under multiple conditions and matches the intake pipe mouth structure vibration and airflow motion characteristics is selected, and finally the analysis results of all conditions are integrated to determine the main order of the vehicle intake pipe mouth noise.

[0051] In some embodiments of the present application, according to the noise data corresponding to each test condition, the main order of the vehicle intake pipe mouth noise can be calculated, which can include: processing the noise data corresponding to each test condition respectively to generate the noise sound pressure curve corresponding to each test condition; and calculating the main order of the vehicle intake pipe mouth noise according to the noise sound pressure curve corresponding to each test condition.

[0052] Specifically, the noise sound pressure curve is a core chart representing noise energy distribution, and in this embodiment, the curve usually takes frequency (Hz) or engine working order as the horizontal coordinate and sound pressure level (dB) as the vertical coordinate. For each test condition, the frequency spectrum data or order slice data of the sound pressure sensors arranged at each measuring point are extracted from the first noise data, and independent sound pressure curve graphs are drawn. These curves clearly show the distribution of noise energy at different frequencies or orders under this particular condition. Subsequently, the peak value of the noise sound pressure curve corresponding to each test condition is extracted, and the characteristic frequency points with a sound pressure level higher than a preset threshold are selected, and auxiliary analysis is performed in combination with the sound pressure curves of each measuring point to check whether these candidate peak frequencies / orders also present corresponding peaks on the in-vehicle noise sound pressure curve under the same condition and have a significant sound pressure level. Finally, those orders with a prominent sound pressure level at the intake pipe mouth and not disturbed by exhaust noise are determined as the main orders of the vehicle intake pipe mouth noise. The preset threshold can be calibrated according to actual conditions.

[0053] In some embodiments of the present application, the vehicle model information of the test vehicle is obtained and stored in the database together with the contribution amount.

[0054] Specifically, in the embodiment, the vehicle model information of the test vehicle can include a vehicle model platform code, an engine model, an intake system model, etc., the vehicle model information is stored in association with the noise contribution of each main order under different working conditions (i.e., stored in a database), and a complete data record is formed. According to the database, a reasonable intake NVH noise target line can be more conveniently formulated for a new vehicle model, and more reasonable intake system materials are used, so that the cost and weight of the intake system are effectively reduced.

[0055] As a specific embodiment of the present application, a mid-term modified two-wheel drive OTS (Off-Tooling Sample, i.e., a sample manufactured using the same, official tooling mold, production process and flow as the mass production line) vehicle is taken as an example for detailed description, as shown in Figure 2 The method for measuring the noise contribution of the intake pipe opening to the vehicle interior noise can include the following steps: S110, a noise generator is arranged in the air filter of the test vehicle, and a plurality of sound pressure sensors are arranged in the test vehicle according to a preset noise measurement point arrangement strategy.

[0056] Specifically, in the embodiment, an LMS front-end data acquisition system, a sound pressure sensor and a CAN bus are used to build a test system. It should be noted that the LMS front-end generally refers to LMS SCADAS Mobile / Recorder type data acquisition front-end hardware, which is matched with LMS Test.Lab / Test.Xpress software, is responsible for conditioning, sampling and digitizing sensor signals (accelerometer, microphone, strain gauge, CAN, GPS, etc.), and then high-speed transmission to the host computer or local storage, and is the "physical entrance" of the entire test system.

[0057] The noise generator is tightly fixed in the air filter, the sound generator frequency is a white noise of 60-20000 Hz wide frequency range, and the single frequency is measured at 40, 80, 120, 160, 200, 500, 1000, 3000, 5000 and 10000 Hz. The sound generator sound pressure level is 80, 85, 90, 95, 100, 105, 110, 115, 120, 125 and 130 dBA.

[0058] According to the preset strategy, four sound pressure sensors are arranged, wherein the first sound pressure sensor is arranged at the opening of the engine intake pipe, specifically at the horizontal 45-degree 10-centimeter position of the pipe opening; the second sound pressure sensor is arranged at the front wall of the engine compartment, along the longitudinal axis direction of the vehicle, specifically at the X-direction near field 10 cm of the front wall of the engine compartment; the third sound pressure sensor is arranged on the surface of the exhaust system bellows, specifically at the near field 2 cm of the bellows; and the fourth sound pressure sensor is arranged in the driver's cabin, specifically at the driver's inner ear in the vehicle interior.

[0059] S120 controls the test vehicle and noise generator according to the first preset test strategy of the test vehicle, so as to obtain the first sound pressure information of the test vehicle through multiple sound pressure sensors.

[0060] Specifically, in this embodiment, the first preset test strategy aims to acquire data through two modes: Mode 1: no speaker excitation, to measure the vehicle's own background noise; Mode 2: wideband speaker excitation, to perform transmission path scanning. The above two modules are executed in the following tests respectively: Static condition test: The engine is not started, the noise generator is turned on and the measurement begins at the same time. The measurement time is about 30 seconds, and the test is repeated 3 times.

[0061] Stationary Condition Test: After fully warming up the engine, place the transmission in Park (P). Once the measurement begins, gradually increase the engine speed from idle to 3750 rpm, stabilize for at least 1 second, then quickly release the accelerator to allow it to decelerate naturally back to idle. The measurement should cover at least 1 second of stable engine speed and include the entire deceleration process. Measure the maximum sound pressure level during the entire process as the result. Perform the test three times.

[0062] Hot engine idling test: With the engine warm, ensure the exhaust temperature is 90℃, and perform two operating conditions: P gear AC OFF condition, with the air conditioning system off; P gear AC ON condition, with the air conditioning system on, fixed at level 1 and fan speed at minimum. Record data at least 3 times for each condition, 30 seconds each time.

[0063] Vehicle acceleration test: After fully warming up the engine, measurements were taken once the exhaust outlet temperature reached 180℃. After one set of measurements, the machine was stopped and allowed to cool. This warm-up process was repeated to ensure minimal temperature variation in each measurement, thus avoiding inconsistencies. The chassis dynamometer was set to in-vehicle mode. Acceleration was performed with the accelerator pedal at 100% opening, increasing the vehicle speed from 20km / h to 120km / h. Exhaust noise was measured. If the vehicle speed could not be reached, the maximum engine speed was used as the standard. Each test condition was performed three times.

[0064] S130, preprocess the first sound pressure information to obtain the main order of the vehicle's air intake noise, and generate a target test strategy based on the main order of the vehicle's air intake noise.

[0065] Specifically, in the embodiment, the first sound pressure information obtained in S120 is processed using the Test lab software, and first, the total sound pressure level and order noise sound pressure level corresponding to the right ear of the main driver and the air intake pipe mouth when the sound generator is not turned on under the static working condition are calculated. Then, the total sound pressure level and order noise sound pressure level corresponding to the right ear of the main driver and the air intake pipe mouth when the sound generator is not turned on under other different working conditions are calculated, the data is analyzed, and the main order of the air intake pipe mouth noise affecting the vehicle interior noise is identified. By comparing the total noise sound pressure levels measured under the static working condition, different tests and different working conditions without the sound generator and with the sound generator, the influence of the air intake pipe mouth noise on the total sound pressure level in the vehicle can be obtained.

[0066] In S140, a test vehicle and a noise generator are controlled according to a target test strategy, so as to obtain second sound pressure information of the test vehicle through a plurality of sound pressure sensors.

[0067] It should be emphasized that the test vehicle working condition adopted in the present step is completely the same as that in step S120, and the fundamental difference lies in that the control strategy of the noise generator is changed from the first stage of “wide frequency scanning” to the second stage of “single frequency accurate excitation” for the specific main order.

[0068] Specifically, in the embodiment, under the different working conditions of the different tests, the sound frequency of the sound generator is adjusted to the main order frequency measured in the front, and the sound pressure level is gradually increased, and the noise of the right ear of the main driver and the air intake pipe mouth is tested, and the sound pressure level corresponding to the main order frequency is obtained by processing the noise data.

[0069] In S150, the second sound pressure information is analyzed and calculated to generate the contribution of the air intake pipe mouth noise of the vehicle to the interior noise.

[0070] Specifically, in the embodiment, by comparing the order noise sound pressure levels measured under different working conditions without the sound generator and with the sound generator, the influence of the air intake pipe mouth order noise on the order noise sound pressure level in the vehicle can be obtained.

[0071] In S160, the vehicle model information of the test vehicle is obtained, and the vehicle model information and the contribution are stored in a database.

[0072] Specifically, in the embodiment, different vehicle models are tested, and a database is established, so that the contribution of the air intake pipe mouth noise to the interior noise of the vehicle can be more accurately and reasonably determined, and the air intake noise target line can be easily formulated.

[0073] In order to verify the technical effect of the above-mentioned method of the present application, a specific experimental example of the present application is provided as follows: A certain car model is tested. First, the output sound pressure level of the noise generator is calibrated at a distance of 50 cm to ensure the accuracy of the excitation signal. Under the static test condition, the sound generator is placed in the air filter.

[0074] The generator is set to wide frequency (60Hz-20000Hz), and the intake pipe noise and the in-vehicle noise are measured respectively at 80, 85, 90, 95, 100, 105, 110, 115 dBA. The test found that when the excitation sound pressure level is lower than 85 dBA, the human ear in the vehicle cannot perceive, at this time the in-vehicle noise background value is about 25 dBA, and the noise at the intake pipe is 69 dBA.

[0075] In order to accurately identify the main order, the noise generator respectively sends out 40, 80, 120, 160, 200 Hz single frequency signals, and the sound pressure level increases from 85 dBA to 115 dBA. Under the excitation of 115 dBA, the key data are shown in the following table:

[0076] Data analysis shows that at 120Hz and 200Hz frequencies, the in-vehicle noise sound pressure level (53 dBA) is significantly higher than that of other frequencies. Therefore, it is determined that these two frequencies are the main order of the intake pipe noise of the test vehicle.

[0077] The experimental example fully proves the effectiveness and accuracy of the method in identifying the main order of the intake pipe noise. After identifying the main order, the subsequent more in-depth contribution amount quantitative test can be carried out accordingly.

[0078] In summary, according to the method for measuring the contribution amount of the intake pipe noise to the in-vehicle noise according to the embodiments of the present application, first, a noise generator is arranged in the air filter of the test vehicle, and a plurality of sound pressure sensors are arranged in the test vehicle according to a preset noise measurement point arrangement strategy, second, the test vehicle and the noise generator are controlled according to a first preset test strategy of the test vehicle, and the first sound pressure information of the test vehicle is obtained through the plurality of sound pressure sensors, then the first sound pressure information is preprocessed to obtain the main order of the vehicle intake pipe noise, and the target test strategy is generated, then the test vehicle and the noise generator are controlled based on the target test strategy, and the second sound pressure information of the test vehicle is obtained through the plurality of sound pressure sensors, and finally the second sound pressure information is analyzed and calculated to generate the contribution amount of the vehicle intake pipe noise to the in-vehicle noise. Therefore, the intake noise contribution amount can be accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0079] Corresponding to the above embodiments, the present application also provides a device for measuring the contribution amount of the intake pipe noise to the in-vehicle noise.

[0080] As Figure 3As shown, the device 200 for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise in the embodiment of the present application comprises an arrangement module 210, a first acquisition module 220, a preprocessing module 230, a second acquisition module 240, and an analysis and calculation module 250.

[0081] The arrangement module 210 is configured to set the noise generator in the air filter of the test vehicle and arrange a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy. The preprocessing module 230 is configured to preprocess the first sound pressure information to obtain the main order of the vehicle intake pipe mouth noise, and generate a target test strategy according to the main order of the vehicle intake pipe mouth noise. The second acquisition module 240 is configured to control the test vehicle and the noise generator according to the target test strategy to obtain second sound pressure information of the test vehicle through the plurality of sound pressure sensors.

[0082] According to an embodiment of the present application, the arrangement module 210 is specifically configured to set the noise generator in the air filter of the test vehicle and arrange a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy, wherein the plurality of sound pressure sensors include a first sound pressure sensor, a second sound pressure sensor, a third sound pressure sensor, and a fourth sound pressure sensor. The arrangement of the plurality of sound pressure sensors in the test vehicle according to the preset noise measurement point arrangement strategy includes: setting the first sound pressure sensor at the opening of the engine intake pipe of the test vehicle; setting the second sound pressure sensor at a first preset distance in the longitudinal axis direction of the vehicle cabin front wall of the test vehicle; setting the third sound pressure sensor at a second preset distance of the bellows near field of the test vehicle; and setting the fourth sound pressure sensor in the driver's cabin of the test vehicle.

[0083] According to an embodiment of the present application, the first acquisition module 220 is specifically configured to control the test vehicle and the noise generator according to the first preset test strategy of the test vehicle to obtain the first sound pressure information of the test vehicle through the plurality of sound pressure sensors, including: analyzing the first preset test strategy to determine a plurality of test working conditions of the test vehicle and obtain a vehicle control strategy and a noise generator control strategy corresponding to each test working condition in the plurality of test working conditions; and controlling the test vehicle and the noise generator according to the vehicle control strategy and the noise generator control strategy corresponding to each test working condition, respectively, to obtain the first sound pressure information of the test vehicle in each test working condition through the plurality of sound pressure sensors.

[0084] According to one embodiment of the present application, the preprocessing module 230 is specifically configured to preprocess the sound pressure information to obtain the main order of the vehicle intake pipe mouth noise, including: processing the first sound pressure information based on a preset processing software to generate first noise data; analyzing the first noise data to obtain noise data corresponding to each test condition, and calculating the main order of the vehicle intake pipe mouth noise according to the noise data corresponding to each test condition.

[0085] According to one embodiment of the present application, the analyzing and calculating module 250 is specifically configured to calculate the main order of the vehicle intake pipe mouth noise according to the noise data corresponding to each test condition, including: processing the noise data corresponding to each test condition respectively to generate a noise sound pressure curve corresponding to each test condition; and calculating the main order of the vehicle intake pipe mouth noise according to the noise sound pressure curve corresponding to each test condition.

[0086] According to one embodiment of the present application, the device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise 200 can further include a data management module, wherein the data management module is configured to obtain vehicle model information of the test vehicle, and store the vehicle model information and the contribution into a database.

[0087] It should be noted that the above explanations and descriptions of the embodiments of the method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise and the device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise of the present application are also applicable. To avoid redundancy, they will not be described in detail here.

[0088] In summary, the device for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise according to the embodiments of the present application first arranges the noise generator in the air filter of the test vehicle, and arranges a plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy. Then, the first acquisition module controls the test vehicle and the noise generator according to a first preset test strategy of the test vehicle, and acquires first sound pressure information of the test vehicle through the plurality of sound pressure sensors. Then, the preprocessing module preprocesses the first sound pressure information to obtain the main order of the vehicle intake pipe mouth noise, so as to generate a target test strategy. Then, the second acquisition module controls the test vehicle and the noise generator according to the target test strategy, so as to acquire second sound pressure information of the test vehicle through the plurality of sound pressure sensors. Finally, the analyzing and calculating module analyzes and calculates the second sound pressure information to generate the contribution of the vehicle intake pipe mouth noise to the vehicle interior noise. Thus, the intake noise contribution can be accurately quantified, and reliable data basis is provided for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0089] Corresponding to the above embodiments, the present application further provides an electronic device.

[0090] AsFigure 4 As shown, the electronic device 300 of the embodiment of the present application includes a memory 310, a processor 320, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement any one of the above-mentioned methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise.

[0091] According to the electronic device of the embodiment of the present application, when the processor executes the computer program, the above-mentioned method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented, and the precise quantification of the intake noise contribution is achieved, which provides a reliable data basis for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0092] Corresponding to the above-mentioned embodiments, the present application further proposes a computer readable storage medium.

[0093] The computer readable storage medium of the embodiment of the present application has a computer program stored thereon, and the program is executed by the processor to implement any one of the above-mentioned methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise.

[0094] According to the computer readable storage medium of the embodiment of the present application, when the computer program stored thereon is executed by the processor, the above-mentioned method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented, and the precise quantification of the intake noise contribution is achieved, which provides a reliable data basis for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0095] Corresponding to the above-mentioned embodiments, the present application further proposes a computer program product.

[0096] The computer program product of the embodiment of the present application includes a computer program, and the computer program is executed by the processor to implement any one of the above-mentioned methods for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise.

[0097] According to the computer program product of the embodiment of the present application, when the computer program is executed, the above-mentioned method for measuring the contribution of the intake pipe mouth noise to the vehicle interior noise is implemented, and the precise quantification of the intake noise contribution is achieved, which provides a reliable data basis for optimizing the NVH performance of the intake system and setting the target line of the intake noise.

[0098] Specifically, in the embodiments of the present application, in the description of the present specification, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0099] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terms "comprise", "comprising", "include", "including", "contain", "containing" or variations thereof are used inclusively and do not exclude the additional inclusion of unrecited features, structures, materials, or characteristics.

[0100] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and ordinary skilled people in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A method for measuring the contribution of intake pipe noise to vehicle interior noise, characterized in that, include: A noise generator is installed inside the air filter of the test vehicle, and multiple sound pressure sensors are arranged in the test vehicle according to a preset noise measurement point arrangement strategy. According to the first preset test strategy of the test vehicle, the test vehicle and the noise generator are controlled to obtain the first sound pressure information of the test vehicle through the multiple sound pressure sensors; The first sound pressure information is preprocessed to obtain the main order of the vehicle air intake noise, and a target test strategy is generated based on the main order of the vehicle air intake noise. According to the target, a test strategy is set to control the test vehicle and the noise generator so as to obtain the second sound pressure information of the test vehicle through the multiple sound pressure sensors; The second sound pressure information is analyzed and calculated to generate the contribution of the vehicle intake pipe noise to the in-vehicle noise.

2. The method for measuring the contribution of intake pipe noise to vehicle interior noise according to claim 1, characterized in that, The plurality of sound pressure sensors includes a first sound pressure sensor, a second sound pressure sensor, a third sound pressure sensor, and a fourth sound pressure sensor. The arrangement of the plurality of sound pressure sensors in the test vehicle according to a preset noise measurement point layout strategy includes: The first sound pressure sensor is placed at the opening of the engine intake manifold of the test vehicle. The second sound pressure sensor is set at a first preset distance along the longitudinal axis of the front bulkhead of the engine compartment of the test vehicle; The third sound pressure sensor is set at a second preset distance in the near field of the bellows of the test vehicle; The fourth sound pressure sensor was installed inside the cockpit of the test vehicle.

3. The method for measuring the contribution of intake pipe noise to vehicle interior noise according to claim 1, characterized in that, The step of controlling the test vehicle and the noise generator according to the first preset test strategy of the test vehicle to obtain the first sound pressure information of the test vehicle through the plurality of sound pressure sensors includes: The first preset test strategy is analyzed to determine multiple test conditions of the test vehicle, and the vehicle control strategy and noise generator control strategy corresponding to each of the multiple test conditions are obtained. The test vehicle and the noise generator are controlled according to the vehicle control strategy and the noise generator control strategy corresponding to each test condition, so as to obtain the first sound pressure information of the test vehicle under each test condition through the multiple sound pressure sensors.

4. The method for measuring the contribution of intake pipe noise to vehicle interior noise according to claim 3, characterized in that, The preprocessing of the sound pressure information to obtain the main orders of the vehicle intake pipe noise includes: The first sound pressure information is processed using preset processing software to generate first noise data; The first noise data is analyzed to obtain the noise data corresponding to each test condition, and the main order of the vehicle air intake noise is calculated based on the noise data corresponding to each test condition.

5. The method for measuring the contribution of intake pipe noise to vehicle interior noise according to claim 4, characterized in that, The calculation of the main order of the vehicle's air intake noise based on the noise data corresponding to each test condition includes: The noise data corresponding to each test condition is processed to generate the noise sound pressure curve corresponding to each test condition. Based on the noise sound pressure curves corresponding to each test condition, the main order of the vehicle's air intake noise is calculated.

6. The method for measuring the contribution of intake pipe noise to vehicle interior noise according to claim 4, characterized in that, Also includes: Obtain the vehicle model information of the test vehicle, and store the vehicle model information and the contribution amount in the database.

7. A device for measuring the contribution of intake pipe noise to vehicle interior noise, characterized in that, include: The arrangement module is used to set up a noise generator in the air filter of the test vehicle and arrange multiple sound pressure sensors in the test vehicle according to a preset noise measurement point arrangement strategy. The first acquisition module is used to control the test vehicle and the noise generator according to the first preset test strategy of the test vehicle, so as to acquire the first sound pressure information of the test vehicle through the multiple sound pressure sensors. The preprocessing module is used to preprocess the first sound pressure information to obtain the main order of the vehicle air intake noise, and generate a target test strategy based on the main order of the vehicle air intake noise. The second acquisition module is used to set a test strategy according to the target and control the test vehicle and the noise generator to acquire the second sound pressure information of the test vehicle through the multiple sound pressure sensors. The analysis and calculation module is used to analyze and calculate the second sound pressure information to generate the contribution of the vehicle intake pipe noise to the in-vehicle noise.

8. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the method for measuring the contribution of intake port noise to in-vehicle noise as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the method for measuring the contribution of intake port noise to in-vehicle noise as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for measuring the contribution of intake port noise to in-vehicle noise as described in any one of claims 1-6.

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