Pass-by noise test method, system, electronic device and storage medium for vehicle
By obtaining acceleration speed and actual acceleration at different vehicle gears, and selecting the appropriate test gear for noise testing, the noise level can be corrected. This solves the problem of complex and costly vehicle noise testing in existing technologies, and achieves more efficient and accurate noise testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2025-01-03
- Publication Date
- 2026-08-04
AI Technical Summary
Existing vehicle noise testing methods are costly, complex, require significant manpower and resources, and have long testing cycles. They also struggle to accurately eliminate interfering factors, leading to inaccurate noise test results.
By acquiring the vehicle's acceleration speed in different gears, the actual acceleration is determined. A suitable test gear is selected to conduct acceleration, constant speed, and coasting tests. The actual acceleration is used to correct the noise level, eliminate interference factors, and calculate the final passing noise.
It simplifies the testing process, reduces costs, and improves testing efficiency and accuracy, enabling a more realistic reflection of vehicle noise performance under different driving conditions.
Smart Images
Figure CN119880450B_ABST
Abstract
Description
Technical Field
[0001] This disclosure belongs to the field of vehicle testing technology, and particularly relates to a method, system, electronic device and storage medium for testing vehicle pass-through noise. Background Technology
[0002] Some professional testing organizations possess advanced testing equipment and skilled technicians, enabling them to provide high-quality noise testing services. However, these organizations typically charge higher fees, have complex parameter control procedures during the testing process, employ cumbersome algorithms for testing parameters and results, and require substantial human and material resources, resulting in longer testing cycles. Summary of the Invention
[0003] To address the aforementioned issues, this disclosure provides a method, system, electronic device, and storage medium for testing vehicle passing noise. This solution ensures that the measured noise level reflects the vehicle's true performance at that gear and acceleration by determining the actual acceleration being tested. Finally, noise correction is performed using noise data from different driving modes, thereby eliminating other interfering factors during the testing process and obtaining accurate vehicle passing noise.
[0004] To address the aforementioned technical problems, the first aspect of this invention provides a method for testing the passing noise of a vehicle, the method comprising:
[0005] The vehicle speed is obtained when the vehicle accelerates in different gears, and the actual acceleration of the vehicle in different gears is determined based on the vehicle speed.
[0006] The test gear of the vehicle is determined based on the actual acceleration; in the test gear, the first external noise when the vehicle is accelerating, the second external noise when the vehicle is at a constant speed, and the third external noise when the vehicle is coasting are acquired.
[0007] The first and second external vehicle noises are corrected by the third external vehicle noise.
[0008] The final passing noise is calculated based on the corrected first and second external passing noise.
[0009] According to a preferred embodiment of the present invention, determining the test gear of the vehicle based on the actual acceleration includes:
[0010] The power-to-mass ratio is calculated based on the vehicle's engine power and the vehicle's total mass.
[0011] The target acceleration and reference acceleration of the vehicle are determined based on the power-to-mass ratio.
[0012] Each actual acceleration is compared with the target acceleration and the reference acceleration, and the test gear is determined based on the comparison results.
[0013] According to a preferred embodiment of the present invention, the step of comparing each of the actual accelerations with the target acceleration and the reference acceleration, and determining the test gear based on the comparison results, includes:
[0014] The actual acceleration of the vehicle is compared with the target acceleration and the reference acceleration;
[0015] If the actual acceleration a corresponding to the i-th gear of the vehicle i The relative deviation from the reference acceleration is less than the preset deviation, and a i If the acceleration is less than the preset standard, then the i-th gear is used as the test gear;
[0016] If the actual acceleration a corresponding to the (i+1)th gear of the vehicle i+1 Less than the reference acceleration, and the reference acceleration is less than a. i , and a i If the acceleration is less than the preset standard, then the i-th gear and the (i+1)-th gear will be used as test gears;
[0017] If a i Greater than the preset standard acceleration, and a i+1 If the actual acceleration is greater than the target acceleration, the gear with the actual acceleration less than the preset standard acceleration will be used as the test gear;
[0018] If a i Greater than the preset standard acceleration, and a i+1 If the acceleration is greater than the target acceleration, then the i-th gear and the (i+1)-th gear will be used as test gears.
[0019] According to a preferred embodiment of the present invention, the testing method further includes:
[0020] When the vehicle has only one gear, that gear is used as the test gear.
[0021] According to a preferred embodiment of the present invention, obtaining the vehicle speed during acceleration in different gears includes:
[0022] When the vehicle enters the vehicle test area in different gears, the accelerator pedal is pressed, and the first vehicle speed signal and the first accelerator pedal signal are recorded; when the vehicle leaves the vehicle test area, the accelerator pedal is released, and the second vehicle speed signal and the second accelerator pedal signal are recorded.
[0023] The vehicle speeds at different gears are calculated based on the first vehicle speed signal, the first accelerator pedal signal, the second vehicle speed signal, and the second accelerator pedal signal.
[0024] According to a preferred embodiment of the present invention, the testing method further includes:
[0025] When the vehicle passes through the middle of the test section, the vehicle speed meets the preset test requirements.
[0026] According to a preferred embodiment of the present invention, acquiring the first external noise during the vehicle's acceleration test, the second external noise during the vehicle's constant speed test, and the third external noise during the vehicle's coasting test includes:
[0027] The first vehicle exterior noise, the second vehicle exterior noise, and the third vehicle exterior noise were obtained using at least two sound level meters.
[0028] The first vehicle external passing noise is obtained by averaging the individual first vehicle external passing noises;
[0029] The second vehicle external passing noise is obtained by averaging all the second vehicle external passing noises.
[0030] The third vehicle external passing noise is obtained by averaging the external passing noise of each of the three vehicles.
[0031] To address the aforementioned technical problems, a second aspect of the present invention provides a vehicle pass-through noise testing system, the testing system comprising:
[0032] An acceleration determination module is used to acquire the vehicle speed when the vehicle accelerates in different gears, and to determine the actual acceleration of the vehicle in different gears based on the vehicle speed.
[0033] The noise acquisition module is used to determine the test gear of the vehicle based on the actual acceleration; in the test gear, the module acquires the first external noise when the vehicle is accelerating, the second external noise when the vehicle is at a constant speed, and the third external noise when the vehicle is coasting.
[0034] A noise correction module is used to correct the first external noise and the second external noise based on the third external noise.
[0035] The noise calculation module is used to calculate the final passing noise based on the corrected first and second external passing noises.
[0036] To address the aforementioned technical problems, a third aspect of the present invention provides an electronic device, comprising:
[0037] Processor; and
[0038] A memory storing computer-executable instructions, which, when executed, cause the processor to perform the method described in any of the above embodiments.
[0039] To address the aforementioned technical problems, a fourth aspect of the present invention provides a computer storage medium, wherein the computer storage medium stores one or more programs, which, when executed by a processor, implement the method described in any of the above embodiments.
[0040] Compared with existing technologies, this disclosure has the following advantages: This disclosure determines the actual acceleration of the vehicle in different gears by acquiring the vehicle speed during acceleration at different gears, and then determines the gear to be tested based on the actual acceleration. This ensures that the measured noise level reflects the vehicle's true performance at that gear and acceleration. Then, the external noise during acceleration, constant speed, and coasting in that test gear is obtained. The external noise during acceleration and constant speed is corrected using the external noise during coasting, eliminating other interfering factors during the testing process, resulting in accurate external noise during acceleration and constant speed. Finally, the vehicle's passing noise is calculated. This solution is simple, efficient, and easy to conduct experiments on, facilitating the tuning of passing noise control schemes.
[0041] Other features and advantages of this disclosure will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description
[0042] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0043] Figure 1 A schematic flowchart of a vehicle passing noise test method according to an embodiment of the present disclosure is shown;
[0044] Figure 2 A schematic plan view of a vehicle test zone according to an embodiment of the present disclosure is shown;
[0045] Figure 3 A second schematic flowchart of a vehicle traffic noise testing method according to an embodiment of the present disclosure is shown.
[0046] Figure 4 A schematic flowchart of a method for determining a test gear according to an embodiment of the present disclosure is shown;
[0047] Figure 5 A block diagram of a vehicle pass-through noise testing system according to an embodiment of the present disclosure is shown;
[0048] Figure 6 A schematic diagram of an electronic device structure according to an embodiment of the present disclosure is shown.
[0049] In the diagram: 1: First speed measuring device; 2: Second speed measuring device; 3: First sound level meter; 4: Second sound level meter. Detailed Implementation
[0050] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0051] The same reference numerals in the accompanying drawings denote the same or similar elements, components, or parts, and therefore, repeated descriptions of the same or similar elements, components, or parts may be omitted below. It should also be understood that although terms such as first, second, third, etc., indicating numbers may be used herein to describe various devices, elements, components, or parts, these devices, elements, components, or parts should not be limited by these terms. That is, these terms are only used to distinguish one from another. For example, a first device may also be referred to as a second device, without departing from the essential technical solution of the invention. Furthermore, the terms "and / or" and "and / or" refer to all combinations including any one or more of the listed items.
[0052] Please see Figure 1 , Figure 1 This is a schematic diagram of one of the vehicle passing noise testing methods provided by the present invention, as shown below. Figure 1 As shown, the method includes:
[0053] S11. Obtain the vehicle speed when accelerating in different gears, and determine the actual acceleration of the vehicle in different gears based on the vehicle speed.
[0054] In this embodiment, the speed range of a vehicle when accelerating in different gears is affected by a variety of factors, such as vehicle type, engine performance, transmission design, and driver's driving habits.
[0055] In this embodiment, the actual acceleration of the vehicle in different gears can be determined by obtaining the vehicle's acceleration speed.
[0056] S12. Determine the test gear of the vehicle based on the actual acceleration; in the test gear, acquire the first external noise when the vehicle is accelerating, the second external noise when the vehicle is moving at a constant speed, and the third external noise when the vehicle is coasting.
[0057] In this embodiment, the actual acceleration of the vehicle in different gears can be measured by setting a vehicle test range, for example, such as... Figure 2 As shown, the test section is set with lines AA' and BB' perpendicular to the test road. The vehicle speed is measured when the vehicle passes through lines AA' and BB by a first speed measuring device 1 set on line AA' and a second speed measuring device 2 set on line BB'. At the same time, the vehicle's accelerator pedal signal can be obtained to determine the specific time when the accelerator pedal is pressed and released, thereby calculating the actual acceleration of the vehicle in different gears.
[0058] In this embodiment, a noise acquisition device can also be set up within the test zone to collect noise data during vehicle testing. This noise acquisition device can be sound level meters positioned on both sides of the vehicle to measure the vehicle's passing noise. For example, at least two sound level meters can be used to obtain first, second, and third external passing noises respectively. The first external passing noise is calculated by averaging the individual first external passing noises; the second external passing noise is calculated by averaging the individual second external passing noises; and the third external passing noise is calculated by averaging the individual third external passing noises. Specifically, a first sound level meter 3 and a second sound level meter 4 can be positioned on both sides of the PP' line in the middle of the test road. The line connecting the first sound level meter 3 and the second sound level meter 4 is perpendicular to the vehicle's center line CC'. More specifically, the distance between the two sound level meters is set to 15 meters, and each sound level meter is 7.5 meters from the vehicle's center line and 1.2 meters above the ground. The noise level is obtained by averaging the noise detected by the first sound level meter 3 and the noise detected by the second sound level meter 4.
[0059] Specifically, when the vehicle enters the vehicle test area in different gears, the accelerator pedal is pressed, and the first vehicle speed signal and the first accelerator pedal signal are recorded; when the vehicle leaves the vehicle test area, the accelerator pedal is released, and the second vehicle speed signal and the second accelerator pedal signal are recorded; the vehicle speed when accelerating in different gears is calculated based on the first vehicle speed signal, the first accelerator pedal signal, the second vehicle speed signal, and the second accelerator pedal signal.
[0060] In this embodiment, the first vehicle speed signal and the second vehicle speed signal can determine the change in vehicle speed within the vehicle test range, while the first pedal signal and the second pedal signal can determine the specific time difference of throttle control. The vehicle acceleration can be calculated by the change in vehicle speed and the time difference.
[0061] In this embodiment, pressing and releasing the accelerator pedal can be achieved by a pre-set mechanical control device, which generates a first pedal signal and a second pedal signal when the accelerator pedal is pressed and released. Alternatively, a detection device can be installed on the accelerator pedal in the vehicle to detect whether the accelerator pedal is pressed or released, and then generate corresponding first and second pedal signals. The first and second pedal signals can then be received by a CAN signal recorder as the basis for other data processing.
[0062] In this embodiment, to comply with relevant regulations and the impact of vehicle noise on urban areas during actual use, when conducting acceleration, constant speed, and coasting tests at different gears, the vehicle speed is ensured to meet preset test requirements when passing the middle of the test interval. Specifically, the preset test requirements may be a vehicle speed of 50±1km / h. The speed limit for vehicles on urban roads is generally 50km / h. In this solution, noise testing is conducted at 50km / h, which meets the requirements for most of the time.
[0063] S13. Correct the first and second vehicle external noises by using the third vehicle external noise.
[0064] In this embodiment, the main purpose of the coasting external noise test is to measure and evaluate the external noise generated by the vehicle during coasting, including tire noise, wind noise, engine noise, etc., so that vehicle manufacturers can understand the noise situation of the vehicle in actual use, thereby optimizing vehicle design and improving vehicle performance.
[0065] In the coasting test, the vehicle is accelerated to a predetermined speed and driven into the test area. Then, the gear is disengaged, the engine is turned off, and all other non-safety-related auxiliary systems are shut off, allowing the vehicle to coast solely on its kinetic energy until it comes to a stop. During the coasting process, the hub temperature at the beginning and end of the test, as well as noise data, are recorded. This data will be used for subsequent temperature correction and noise characteristic analysis. This correction aims to more accurately reflect the tire's noise characteristics under real-world driving conditions and eliminate other interfering factors during the test.
[0066] S14. Based on the corrected first and second external vehicle noise, the final passing noise is calculated.
[0067] In this embodiment, when calculating the final passing noise, we usually consider vehicle noise under two conditions: acceleration and constant speed. In urban roads, the vehicle noise that may affect others is mainly the noise of vehicles accelerating and vehicles traveling at a constant speed. After correcting the first and second external passing noises by passing the noise of vehicles gliding, a more accurate noise situation is retained.
[0068] In this embodiment, the vehicle's passing noise can be calculated by weighted averaging of the first and second external passing noises. Specifically, the final passing noise result is as follows:
[0069] L 最终结果 =L 加速 -kp(L 加速 -L 匀速 );
[0070] Among them, L 最终结果 To ultimately overcome the noise, L 加速 For the first vehicle's external noise, L 匀速 The second external noise level is kp, which is a weighting coefficient. kp can be calculated from the relationship between the passing noise determined in the historical test records and the passing noise during acceleration and constant speed driving, or it can be set by relevant personnel.
[0071] In this scheme, kp can be calculated using the following formula:
[0072] kp = 1 - (a urban / a test );
[0073] Among them, a urban For the actual acceleration of the city, a test For testing reference acceleration;
[0074] In this scheme, by collecting data on the vehicle's actual urban acceleration and test reference acceleration, the weighting coefficient kp can be obtained as 0.34.
[0075] This disclosure determines the vehicle's actual acceleration in different gears by acquiring the vehicle's speed during acceleration. The actual acceleration is then used to determine the gear for testing. This method ensures that the measured noise level accurately reflects the vehicle's performance at that gear and acceleration. The external noise levels during acceleration, constant speed, and coasting in the test gear are then obtained. The external noise levels during acceleration and constant speed are corrected using the coasting noise level, eliminating other interfering factors during the testing process to obtain accurate external noise levels for acceleration and constant speed. Finally, the vehicle's passing noise is calculated. This method is simple, efficient, and easy to conduct, facilitating the tuning of passing noise reduction schemes.
[0076] Please see Figure 3 , Figure 3 This is a second schematic diagram of a vehicle passing noise testing method provided by the present invention, as shown below. Figure 3 As shown, the method includes:
[0077] S21. The power-to-mass ratio is calculated based on the vehicle's engine power and the vehicle's total mass.
[0078] In this embodiment, the power-to-weight ratio (PMR) refers to the ratio between the power provided by the engine and the mass of the engine (or vehicle). It measures the power obtained per unit mass and is a key indicator for evaluating engine performance. In calculation, the PMR does not consider the size of the vehicle and its resulting air resistance; it is obtained by directly dividing the engine power by the vehicle mass. The PMR is obtained based on the engine power and the total vehicle mass, where PMR = engine power / (curb weight + 75 kg driver mass) * 1000.
[0079] S22. Determine the target acceleration and reference acceleration of the vehicle based on the power-to-mass ratio.
[0080] In this embodiment, the target acceleration a is calculated based on the power-to-mass ratio (PMR), where the target acceleration a = 0.63 × log10(PMR) - 0.09; and the reference acceleration a is calculated. ref ,a ref =1.59×log10(PMR)-1.14.
[0081] S23. Compare each actual acceleration with the target acceleration and the reference acceleration respectively, and determine the test gear based on the comparison results.
[0082] In this embodiment, by comparing the actual acceleration, the target acceleration, and the reference acceleration, the gear that best matches the actual acceleration is determined as the test gear. This ensures that the noise level measured in the test gear is the true performance of the vehicle at that gear and acceleration, thereby achieving more accurate noise testing.
[0083] In this embodiment, when the vehicle has only one gear, it is only necessary to use that gear as the test gear, and there is no need to compare the actual acceleration with the target acceleration and the reference acceleration.
[0084] In this embodiment, as Figure 4 As shown, the method for determining the test gear in this step includes the following steps:
[0085] S31. Compare the vehicle's actual acceleration with the target acceleration and the reference acceleration.
[0086] S32. If the actual acceleration a corresponding to the i-th gear of the vehicle is... i The relative deviation from the reference acceleration is less than the preset deviation, and a i If the acceleration is less than the preset standard, then the i-th gear will be used as the test gear.
[0087] S33. If the actual acceleration a corresponding to the (i+1)th gear of the vehicle is... i+1 Less than the reference acceleration, and the reference acceleration is less than a. i , and a i If the acceleration is less than the preset standard, then the i-th gear and the (i+1)-th gear will be used as test gears.
[0088] S34, if a i Greater than the preset standard acceleration, and a i+1 If the acceleration is greater than the target acceleration, then the gear with the actual acceleration less than the preset standard acceleration will be used as the test gear.
[0089] S35, if a i Greater than the preset standard acceleration, and a i+1 If the acceleration is greater than the target acceleration, then the i-th gear and the (i+1)-th gear will be used as test gears.
[0090] In this embodiment, when the relative deviation between the actual acceleration and the reference acceleration corresponding to the i-th gear of the vehicle is less than the preset deviation, the gear can be directly used as the test gear. At this time, in order to avoid abnormalities, the magnitude of the actual acceleration and the preset standard acceleration is determined. When the actual acceleration is less than the preset standard acceleration, the i-th gear is used as the test gear.
[0091] In this embodiment, the preset standard acceleration can be 2.0 m / s². 2 If a i+1ref i <2.0m / s 2 This involves testing using level i and level i+1 respectively; when a i >2.0m / s 2 And a i+1 When the acceleration exceeds the target acceleration, the acceleration must first reach <2.0 m / s². 2 The block test; when a i >2.0m / s 2 And a i+1 If the acceleration is less than or equal to the target acceleration, then test at the i-th gear and the (i+1)-th gear.
[0092] In a specific embodiment, the method is described in detail. Wherein: the vehicle assembly mass is 1833 kg; PMR = 98.01 kW / t; the target acceleration a is 1.16 m / s². 2 Reference acceleration a ref The acceleration is 1.76 m / s²; the vehicle length is 4.961 m. The acceleration in 3rd gear is 1.77 m / s², and the acceleration in 4th gear is 1.05 m / s², therefore, 3rd gear is selected for the noise test.
[0093] Acceleration external noise test, constant speed external noise test, and coasting external noise test were conducted, and the results are shown in Tables 1, 2, and 3. Table 1: Measurement results of external noise during acceleration; Table 2: Test results of external noise during constant speed; Table 3: Test results of external noise during coasting.
[0094] Table 1:
[0095] VAA VPP VBB aWOT After L left dB(A) correction After L left dB(A) correction 46.3 50.3 57.3 1.78 69.5 69.6 46.2 49.8 57.1 1.76 69.5 69.4 45.9 49.7 57.2 1.82 69.5 69.6 46.5 50.7 57.5 1.79 69.5 69.5 one one one 1.79 69.5 69.5
[0096] Table 2:
[0097] VA VPP VBB After L left dB(A) correction After L left dB(A) correction 49.9 49.9 49.8 66.3 66.6 50.4 50.5 50.5 66.6 66.6 50.1 50.2 50.4 66.5 66.5 49.6 49.8 49.9 66.4 66.4 one one 66:5 66:5
[0098] Table 3:
[0099] VAA Vpp VBB L left dB(A) L left dB(A) 41.08 62.3 62.7 44.23 62.8 63.4 47.33 63.5 63.9 51.41 64.3 64.8 54.74 65.4 65.8
[0100] Please see Figure 5 , Figure 5 This is a block diagram of a vehicle pass-through noise testing system provided by the present invention, such as... Figure 5 As shown, the test system includes: an acceleration determination module 11, a noise acquisition module 12, a noise correction module 13, and a noise calculation module 14.
[0101] In this embodiment, the acceleration determination module 11 is used to obtain the vehicle speed when the vehicle accelerates in different gears, and determine the actual acceleration of the vehicle in different gears based on the vehicle speed.
[0102] In this embodiment, the noise acquisition module 12 is used to determine the test gear of the vehicle based on the actual acceleration; in the test gear, the first external noise when the vehicle is accelerating, the second external noise when the vehicle is at a constant speed, and the third external noise when the vehicle is coasting are acquired.
[0103] In this embodiment, the noise correction module 13 is used to correct the first and second external vehicle noises by using the third external vehicle noise.
[0104] In this embodiment, the noise calculation module 14 is used to calculate the final passing noise based on the corrected first and second external passing noise.
[0105] In this embodiment, the noise acquisition module 12 includes: a test gear determination unit, used to calculate the power-to-mass ratio based on the vehicle's engine power and the vehicle's total mass; determine the vehicle's target acceleration and reference acceleration based on the power-to-mass ratio; compare each actual acceleration with the target acceleration and reference acceleration respectively, and determine the test gear based on the comparison results.
[0106] In this embodiment, the gear determination unit is specifically used to compare the vehicle's actual acceleration with the target acceleration and the reference acceleration; if the actual acceleration a corresponding to the vehicle's i-th gear is... i The relative deviation from the reference acceleration is less than the preset deviation, and a i If the acceleration is less than the preset standard, then the i-th gear is used as the test gear; if the actual acceleration a corresponding to the (i+1)-th gear of the vehicle is less than the preset standard acceleration, then the test gear is used. i+1 Less than the reference acceleration, and the reference acceleration is less than a. i , and a i If the acceleration is less than the preset standard, then the i-th gear and the (i+1)-th gear will be used as test gears; if a i Greater than the preset standard acceleration, and a i+1 If the acceleration is greater than the target acceleration, then the gear with the actual acceleration less than the preset standard acceleration will be used as the test gear; if a i Greater than the preset standard acceleration, and a i+1 If the acceleration is greater than the target acceleration, then the i-th gear and the (i+1)-th gear will be used as test gears.
[0107] In this embodiment, the test gear determination unit is specifically used to determine the test gear when the vehicle has only one gear.
[0108] In this embodiment, the acceleration determination module 11 is specifically used to press the accelerator pedal and record a first vehicle speed signal and a first accelerator pedal signal when the vehicle enters the vehicle test area in different gears; to release the accelerator pedal and record a second vehicle speed signal and a second accelerator pedal signal when the vehicle leaves the vehicle test area; and to calculate the vehicle speed of the vehicle accelerating in different gears based on the first vehicle speed signal, the first accelerator pedal signal, the second vehicle speed signal, and the second accelerator pedal signal.
[0109] In this embodiment, when the vehicle passes through the middle of the test section, the vehicle speed meets the preset test requirements.
[0110] In this embodiment, the noise acquisition module 12 is specifically used to acquire the first external vehicle noise, the second external vehicle noise, and the third external vehicle noise through at least two sound level meters; to calculate the first external vehicle noise by averaging the first external vehicle noises; to calculate the second external vehicle noise by averaging the second external vehicle noises; and to calculate the third external vehicle noise by averaging the third external vehicle noises.
[0111] like Figure 6 As shown, this embodiment of the invention provides an electronic device, including a processor 1110, a communication interface 1120, a memory 1130, and a communication bus 1140, wherein the processor 1110, the communication interface 1120, and the memory 1130 communicate with each other through the communication bus 1140.
[0112] Memory 1130 is used to store computer programs;
[0113] The processor 1110, when executing the program stored in the memory 1130, implements any of the above test methods.
[0114] The electronic device provided in this embodiment of the invention includes a processor 1110 that executes a program stored in a memory 1130 to obtain the vehicle speed at different gears during acceleration, determines the actual acceleration of the vehicle at different gears based on the vehicle speed, determines the test gear of the vehicle based on the actual acceleration, and, at the test gear, acquires a first external noise level during acceleration testing, a second external noise level during constant speed testing, and a third external noise level during coasting testing; corrects the first and second external noise levels using the third external noise level; and calculates the final passing noise based on the corrected first and second external noise levels.
[0115] The communication bus 1140 mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus 1140 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, it is shown in the figure with only one thick line, but this does not indicate that there is only one bus or one type of bus.
[0116] The communication interface 1120 is used for communication between the above-mentioned electronic device and other devices.
[0117] The memory 1130 may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory 1130 may also be at least one storage device located remotely from the aforementioned processor 1110.
[0118] The processor 1110 mentioned above can be a general-purpose processor 1110, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.
[0119] This invention provides a computer-readable storage medium storing one or more programs, which can be executed by one or more processors 1110 to implement the test method of any of the above embodiments.
[0120] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of the present invention is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).
[0121] Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.
Claims
1. A method for testing the passing noise of a vehicle, characterized in that, The testing method includes: The vehicle speed is obtained when the vehicle accelerates in different gears, and the actual acceleration of the vehicle in different gears is determined based on the vehicle speed. The test gear of the vehicle is determined based on the actual acceleration; in the test gear, the first external noise when the vehicle is accelerating, the second external noise when the vehicle is at a constant speed, and the third external noise when the vehicle is coasting are acquired. The first and second external vehicle noises are corrected by the third external vehicle noise. The final passing noise is calculated based on the corrected first and second external passing noise. Determining the test gear of the vehicle based on the actual acceleration includes: The power-to-mass ratio is calculated based on the vehicle's engine power and the vehicle's total mass. The target acceleration and reference acceleration of the vehicle are determined based on the power-to-mass ratio. Each actual acceleration is compared with the target acceleration and the reference acceleration, and the test gear is determined based on the comparison results. The step of obtaining the vehicle speed when accelerating in different gears includes: When the vehicle enters the vehicle test area in different gears, the accelerator pedal is pressed, and the first vehicle speed signal and the first accelerator pedal signal are recorded; when the vehicle leaves the vehicle test area, the accelerator pedal is released, and the second vehicle speed signal and the second accelerator pedal signal are recorded. The vehicle speeds at different gears are calculated based on the first vehicle speed signal, the first accelerator pedal signal, the second vehicle speed signal, and the second accelerator pedal signal.
2. The test method according to claim 1, characterized in that, The step of comparing each of the actual accelerations with the target acceleration and the reference acceleration, and determining the test gear based on the comparison results, includes: The actual acceleration of the vehicle is compared with the target acceleration and the reference acceleration; If the actual acceleration corresponding to the i-th gear of the vehicle The relative deviation from the reference acceleration is less than the preset deviation, and If the acceleration is less than the preset standard, then the i-th gear is used as the test gear; If the actual acceleration corresponding to the (i+1)th gear of the vehicle Less than the reference acceleration, and the reference acceleration is less than ,and If the acceleration is less than the preset standard, then the i-th gear and the (i+1)-th gear will be used as test gears; like Greater than the preset standard acceleration, and If the actual acceleration is greater than the target acceleration, the gear with the actual acceleration less than the preset standard acceleration will be used as the test gear; like Greater than the preset standard acceleration, and If the acceleration is less than or equal to the target acceleration, then the i-th gear and the (i+1)-th gear are used as test gears.
3. The test method according to claim 1, characterized in that, The testing method also includes: When the vehicle has only one gear, that gear is used as the test gear.
4. The test method according to claim 1, characterized in that, The testing method also includes: When the vehicle passes through the middle of the test section, the vehicle speed meets the preset test requirements.
5. The test method according to any one of claims 1 to 4, characterized in that, The acquisition of the first external noise during the vehicle's acceleration test, the second external noise during the vehicle's constant speed test, and the third external noise during the vehicle's coasting test includes: The first vehicle exterior noise, the second vehicle exterior noise, and the third vehicle exterior noise were obtained using at least two sound level meters. The first vehicle external passing noise is obtained by averaging the individual first vehicle external passing noises; The second vehicle external passing noise is obtained by averaging all the second vehicle external passing noises. The third vehicle external passing noise is obtained by averaging the external passing noise of each of the three vehicles.
6. A vehicle pass-through noise testing system, characterized in that, The testing system includes: An acceleration determination module is used to acquire the vehicle speed when the vehicle accelerates in different gears, and to determine the actual acceleration of the vehicle in different gears based on the vehicle speed. The noise acquisition module is used to determine the test gear of the vehicle based on the actual acceleration; in the test gear, the module acquires the first external noise when the vehicle is accelerating, the second external noise when the vehicle is at a constant speed, and the third external noise when the vehicle is coasting. A noise correction module is used to correct the first external noise and the second external noise based on the third external noise. The noise calculation module is used to calculate the final passing noise based on the corrected first and second external passing noises. The noise acquisition module includes: a test gear determination unit, used to calculate the power-to-mass ratio based on the vehicle's engine power and total mass; determine the vehicle's target acceleration and reference acceleration based on the power-to-mass ratio; compare each actual acceleration with the target acceleration and reference acceleration respectively, and determine the test gear based on the comparison results; The acceleration determination module is specifically used to record the first vehicle speed signal and the first accelerator pedal signal when the vehicle enters the vehicle test area in different gears, by pressing the accelerator pedal; and to record the second vehicle speed signal and the second accelerator pedal signal when the vehicle leaves the vehicle test area by releasing the accelerator pedal. Based on the first vehicle speed signal, the first accelerator pedal signal, the second vehicle speed signal, and the second accelerator pedal signal, the vehicle speed is calculated when the vehicle accelerates in different gears.
7. An electronic device, characterized in that, include: processor; as well as A memory storing computer-executable instructions, which, when executed, cause the processor to perform the method according to any one of claims 1-5.
8. A computer storage medium, characterized in that, in, The computer storage medium stores one or more programs, which, when executed by a processor, implement the method of any one of claims 1-5.