Method and device for testing contribution of pipeline to NVH (Noise Vibration and Harshness) performance in vehicle in whole vehicle state

Abstract

The invention relates to the technical field of pipeline vibration testing, in particular to a method and device for testing the contribution of a pipeline to the NVH performance in a vehicle in the whole vehicle state, and the method comprises the steps: placing a target whole vehicle in an anechoic chamber, and arranging a plurality of vibration sensors and a plurality of noise sensors; performing noise and vibration test on the target whole vehicle according to a preset test working condition to obtain a noise total sound pressure level and a total vehicle interior and exterior vibration square and root value; according to the noise total sound pressure level and the total outside-vehicle vibration square sum root value, the peak values of all frequency bands of the inside-vehicle noise and vibration and the outside-vehicle pipeline vibration are analyzed; and according to the total outside-vehicle vibration square sum root value and the total inside-vehicle vibration square sum root value, an analysis chart of contribution of each pipeline vibration to the inside-vehicle noise and an analysis chart of contribution of each pipeline vibration to the inside-vehicle vibration are synthesized. Therefore, the problems that a related testing method cannot test or a tested transfer function is lack of accuracy, and the influence and contribution of noise and vibration of the pipeline on other parts cannot be seen in a result are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline vibration testing, in particular to a method and device for testing the contribution of a pipeline to the in-vehicle NVH performance under a whole vehicle state. BACKGROUND

[0002] With the continuous maturity of electric car technology, the number of electric cars is also increasing. Compared with traditional cars, electric car technology cancels the engine excitation, resulting in higher requirements for in-vehicle NVH performance testing standards. Therefore, a testing and analysis method capable of collecting and analyzing the contribution of a pipeline to in-vehicle noise and vibration is extremely important. The related art proposes to use a separate pipeline system for evaluation. In this scheme, the transfer function of the pipeline needs to be solved. However, the testing method is not applicable to the whole vehicle state. The transfer function is limited by space and structure and other interferences in the whole vehicle state, which can result in the inability to test or lack of accuracy of the tested transfer function, and the influence and contribution of the noise and vibration of the pipeline itself on other components cannot be seen in the results. SUMMARY

[0003] The present application provides a method and device for testing the contribution of a pipeline to the in-vehicle NVH performance under a whole vehicle state, to solve the problems that the related testing method cannot test or the tested transfer function lacks accuracy, and the influence and contribution of the noise and vibration of the pipeline itself on other components cannot be seen in the results.

[0004] The first aspect of the present application provides a method for testing the contribution of a pipeline to the in-vehicle NVH performance under a whole vehicle state, comprising the following steps: placing a target whole vehicle in an anechoic chamber and arranging a plurality of vibration sensors and a plurality of noise sensors in the target whole vehicle; testing the noise and vibration of the target whole vehicle according to a predetermined test condition to obtain a total sound pressure level, a total in-vehicle vibration square root value, and a total out-of-vehicle vibration square root value; analyzing the peak values of each frequency band of the in-vehicle noise and vibration and the out-of-vehicle pipeline vibration according to the total sound pressure level and the total out-of-vehicle vibration square root value; combining the total out-of-vehicle vibration square root value and the total in-vehicle vibration square root value to synthesize an analysis diagram of the contribution of each pipeline vibration to the in-vehicle noise and an analysis diagram of the contribution of each pipeline vibration to the in-vehicle vibration.

[0005] Optionally, the step of placing a target whole vehicle in an anechoic chamber and arranging a plurality of vibration sensors and a plurality of noise sensors in the target whole vehicle comprises: placing the target whole vehicle in the anechoic chamber by moving a hub; The plurality of vibration sensors are respectively installed on a water pump front pipeline, a water pump rear pipeline, a water pump itself, a main driver seat guide rail and a steering wheel of the target whole vehicle. The plurality of noise sensors are respectively installed on a main driver left ear, a main driver right ear, a right rear row left ear and a right rear row right ear of the target whole vehicle.

[0006] Optionally, the preset test working condition comprises turning on the air conditioner to the lowest temperature and the smallest air volume mode.

[0007] Optionally, the noise and vibration test on the target whole vehicle according to the preset test working condition to obtain a noise total sound pressure level and a total vibration square root value comprises: performing an out-of-vehicle vibration test, an in-vehicle vibration test and an in-vehicle noise test on the target whole vehicle according to the preset test working condition; measuring a plurality of A-weighted total sound pressure levels by using the plurality of noise sensors, and calculating the noise total sound pressure level under the preset test working condition according to the plurality of A-weighted total sound pressure levels; measuring a plurality of in-vehicle vibration square root values and a plurality of out-of-vehicle vibration square root values by using the plurality of vibration sensors; calculating a total in-vehicle vibration square root value under the preset test working condition according to the plurality of in-vehicle vibration square root values; calculating a total out-of-vehicle vibration square root value under the preset test working condition according to the plurality of out-of-vehicle vibration square root values.

[0008] The second aspect embodiment of the present application provides a device for testing a pipeline contribution to in-vehicle NVH performance under a whole vehicle state, comprising: a laying module configured to place a target whole vehicle in an anechoic chamber and lay a plurality of vibration sensors and a plurality of noise sensors in the target whole vehicle; a test module configured to perform a noise and vibration test on the target whole vehicle according to a preset test working condition to obtain a noise total sound pressure level, a total in-vehicle vibration square root value and a total out-of-vehicle vibration square root value; an analysis module configured to analyze in-vehicle noise and vibration and each frequency band peak value of out-of-vehicle pipeline vibration according to the noise total sound pressure level and the total out-of-vehicle vibration square root value; a synthesis module configured to synthesize an in-vehicle noise contribution analysis diagram of each pipeline vibration and an in-vehicle vibration contribution analysis diagram of each pipeline vibration according to the total out-of-vehicle vibration square root value and the total in-vehicle vibration square root value.

[0009] Optionally, the laying module comprises: a first laying unit configured to place the target whole vehicle in the anechoic chamber by moving a hub; The second arrangement unit is used for mounting the plurality of vibration sensors on the water pump front pipeline, the water pump rear pipeline, the water pump itself, the main driver seat guide rail and the steering wheel of the target vehicle respectively. The third arrangement unit is used for mounting the plurality of noise sensors on the main driver left ear, the main driver right ear, the right rear row left ear and the right rear row right ear of the target vehicle respectively.

[0010] Optionally, the preset test working condition comprises turning on the air conditioner to the mode of the lowest temperature and the smallest air volume.

[0011] Optionally, the test module comprises: The test unit is used for performing the out-of-vehicle vibration test, the in-vehicle vibration test and the in-vehicle noise test on the target vehicle according to the preset test working condition; The noise calculation unit is used for measuring a plurality of A-weighted overall sound pressure levels by using the plurality of noise sensors, and calculating a noise overall sound pressure level under the preset test working condition according to the plurality of A-weighted overall sound pressure levels; The out-of-vehicle vibration calculation unit is used for measuring a plurality of in-vehicle vibration square root values and a plurality of out-of-vehicle vibration square root values by using the plurality of vibration sensors; The in-vehicle vibration calculation unit is used for calculating a total in-vehicle vibration square root value under the preset test working condition according to the plurality of in-vehicle vibration square root values; The out-of-vehicle vibration calculation unit is used for calculating a total out-of-vehicle vibration square root value under the preset test working condition according to the plurality of out-of-vehicle vibration square root values.

[0012] 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, wherein the processor executes the program to implement the test method of the contribution of the pipeline to the in-vehicle NVH performance under the vehicle state as described in the above embodiments.

[0013] The fourth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the test method of the contribution of the pipeline to the in-vehicle NVH performance under the vehicle state as described above.

[0014] The test method and device of the contribution of the pipeline to the in-vehicle NVH performance under the vehicle state provided by the embodiments of the present application perform the noise and vibration tests of the in-vehicle fixed points, analyze the influence and contribution of a plurality of complex pipelines on the in-vehicle noise and vibration in the full frequency range under the vehicle state, and finally draw the contribution analysis diagram of the pipeline to the in-vehicle noise and vibration in the full frequency range, so that the test method is relatively simple, and the result is more comprehensive and accurate.

[0015] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 A flow chart of a test method for contribution of a pipeline to in-vehicle NVH performance in a whole vehicle state according to an embodiment of the present application; Figure 2 A seat rail and water pump pipeline vibration analysis diagram according to an embodiment of the present application; Figure 3 A vehicle interior noise and water pump pipeline vibration analysis diagram according to an embodiment of the present application; Figure 4 A contribution amount ranking diagram of three-way vibration of a water pump front and rear pipeline to in-vehicle noise according to an embodiment of the present application; Figure 5 A contribution amount ranking diagram of three-way vibration of a water pump front and rear pipeline to seat vibration according to an embodiment of the present application; Figure 6 A block diagram of a test device for contribution of a pipeline to in-vehicle NVH performance in a whole vehicle state according to an embodiment of the present application; Figure 7 A structural diagram of an electronic device according to an embodiment of the present application.

[0017] Explanation of reference numerals: 60 - test device for contribution of a pipeline to in-vehicle NVH performance in a whole vehicle state, 601 - layout module, 602 - test module, 603 - analysis module, 604 - synthesis module, 701 - memory, 702 - processor, 703 - communication interface. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0019] A test method and device for contribution of a pipeline to in-vehicle NVH performance in a whole vehicle state according to an embodiment of the present application are described below with reference to the accompanying drawings Figure 1 A flow diagram of a test method for contribution of a pipeline to in-vehicle NVH performance in a whole vehicle state according to an embodiment of the present application.

[0020] As Figure 1 shown, the method for testing the contribution of the pipeline to the in-vehicle NVH performance in the whole vehicle state comprises the following steps: In step S101, the target whole vehicle is placed in the anechoic chamber, and a plurality of vibration sensors and a plurality of noise sensors are arranged in the target whole vehicle.

[0021] In some embodiments, the target whole vehicle is placed in the anechoic chamber, and a plurality of vibration sensors and a plurality of noise sensors are arranged in the target whole vehicle, comprising: The target whole vehicle is placed in the anechoic chamber by moving the hub; The plurality of vibration sensors are respectively installed on the water pump front pipeline, the water pump rear pipeline, the water pump itself, the main driver seat rail and the steering wheel of the target whole vehicle; The plurality of noise sensors are respectively installed on the main driver left ear, the main driver right ear, the right rear row left ear and the right rear row right ear position of the target whole vehicle.

[0022] In actual execution process, the target whole vehicle is placed in the moving hub to be transported into the anechoic chamber, and the out-of-vehicle vibration sensors are respectively installed on the water pump front pipeline, the water pump rear pipeline and the water pump itself, and the in-vehicle vibration sensors are installed on the main driver seat rail and the steering wheel to collect in-vehicle vibration information and out-of-vehicle vibration information, and the in-vehicle noise sensors are respectively installed on the main driver left ear, the main driver right ear, the right rear row left ear and the right rear row right ear position to collect in-vehicle noise.

[0023] In step S102, noise and vibration tests are performed on the target whole vehicle according to the preset test conditions to obtain the total sound pressure level, the total in-vehicle vibration square root value and the total out-of-vehicle vibration square root value.

[0024] In some embodiments, the preset test conditions include turning on the air conditioner to the lowest temperature and smallest air volume mode.

[0025] In some embodiments, the noise and vibration tests are performed on the target whole vehicle according to the preset test conditions to obtain the total sound pressure level and the total vibration square root value, comprising: According to the preset test conditions, the out-of-vehicle vibration test, the in-vehicle vibration test and the in-vehicle noise test are performed on the target whole vehicle; A plurality of A-weighted total sound pressure levels are measured by using a plurality of noise sensors, and the total sound pressure level under the preset test conditions is calculated according to the plurality of A-weighted total sound pressure levels; A plurality of in-vehicle vibration square root values and a plurality of out-of-vehicle vibration square root values are measured by using a plurality of vibration sensors; The total in-vehicle vibration square root value under the preset test conditions is calculated according to the plurality of in-vehicle vibration square root values; According to the plurality of vehicle exterior vibration square root values, a total vehicle exterior vibration square root value under the preset test working condition is calculated.

[0026] In the actual execution process, the preset test working condition is started, so that the target vehicle enters the READY mode, the air conditioner is started to ensure that the compressor works, the minimum temperature and the minimum air volume mode are started, and the vehicle interior and exterior vibration, the vehicle interior noise and vibration are tested. The test working condition ensures that more than three groups are tested, and each group runs for 30S.

[0027] Further, the noise sampling frequency of the plurality of noise sensors is set to 25600Hz, and a plurality of A-weighted overall sound pressure levels at the positions of the driver's left ear, the driver's right ear, the right rear seat's left ear and the right rear seat's right ear are collected. Each A-weighted overall sound pressure level is intercepted in a time period in which the compressor can stably run under each working condition, and needs to be stable for more than 20S. A plurality of intercepted A-weighted overall sound pressure levels are obtained, and the noise overall sound pressure level under the working condition is calculated according to the plurality of intercepted A-weighted overall sound pressure levels.

[0028] Further, the vibration sampling frequency of the plurality of vibration sensors is set to 51200Hz, the X, Y and Z direction vehicle exterior vibration square root values of the water pump front pipeline, the water pump rear pipeline and the water pump itself are collected, and the X, Y and Z direction vehicle interior vibration square root values of the driver's seat guide rail and the steering wheel are collected. The plurality of vehicle exterior vibration square root values are synthesized to obtain the total vehicle exterior vibration square root value under the test working condition, and the total vehicle interior vibration square root value under the test working condition is calculated according to the plurality of vehicle interior vibration square root values.

[0029] In step S103, the frequency band peaks of the vehicle interior noise and vibration and the vehicle exterior pipeline vibration are analyzed according to the noise overall sound pressure level and the total vehicle exterior vibration square root value.

[0030] In step S104, the pipeline vibration contribution analysis diagram to the vehicle interior noise and the pipeline vibration contribution analysis diagram to the vehicle interior vibration are synthesized according to the total vehicle exterior vibration square root value and the total vehicle interior vibration square root value.

[0031] In the actual execution process, the frequency band peaks of the vehicle interior noise and vibration and the vehicle exterior pipeline vibration are analyzed according to the noise overall sound pressure level and the total vehicle exterior vibration square root value, such as Figure 2 and 3 It can be seen that the water pump pipeline has multiple frequency peaks for the vehicle interior noise and vibration, and the influence of the pipeline vibration in two directions on the vehicle interior needs to be further analyzed.

[0032] Further, the influence of the pipeline frequency band peaks on the vehicle interior noise and vibration is analyzed according to the total vehicle exterior vibration square root value and the total vehicle interior vibration square root value, and the pipeline vibration contribution analysis diagram to the vehicle interior noise and the pipeline vibration contribution analysis diagram to the vehicle interior vibration are synthesized, such asFigure 4 and 5 It can be seen that the two-pipeline three-way full-frequency vibration has an impact on the in-vehicle noise vibration.

[0033] It should be noted that although the embodiment of the present application only lists the vibration of the two pipelines of the water pump, various complex pipeline conditions can be used in actual tests to help find the pipeline with the largest contribution amount for correction. The present application is not limited to noise and vibration, and the test conditions are not limited to the READY condition, including uniform speed, acceleration, deceleration, etc. The test points can be located at various refrigerant pipelines, lines, power lines, data lines, etc. The test purpose can also be used for comparison and comparison of various performances of different vehicle models including traditional vehicles, hydrogen energy vehicles, etc.

[0034] In summary, the test method for the contribution amount of the pipeline to the in-vehicle NVH performance under the whole vehicle state provided by the embodiment of the present application carries out noise and vibration tests of fixed points in the vehicle, analyzes the impact and contribution of multiple complex pipelines on in-vehicle noise and vibration in the full frequency range under the whole vehicle state, and finally draws a contribution amount analysis diagram of the pipeline to the in-vehicle noise and vibration in the full frequency range. The test method is relatively simple, and the result is more comprehensive and accurate.

[0035] Secondly, the test device for the contribution amount of the pipeline to the in-vehicle NVH performance under the whole vehicle state provided by the embodiment of the present application is described with reference to the accompanying drawings.

[0036] Figure 6 A block schematic diagram of the test device for the contribution amount of the pipeline to the in-vehicle NVH performance under the whole vehicle state provided by the embodiment of the present application is shown.

[0037] As shown in the figure, the test device 60 for the contribution amount of the pipeline to the in-vehicle NVH performance under the whole vehicle state includes a layout module 601, a test module 602, an analysis module 603, and a synthesis module 604. Figure 6 The layout module 601 is used to place the target vehicle in the anechoic chamber and to lay multiple vibration sensors and multiple noise sensors in the target vehicle. The test module 602 is used to test the noise and vibration of the target vehicle according to the preset test condition to obtain the total sound pressure level of the noise, the square root value of the total in-vehicle vibration, and the square root value of the total out-vehicle vibration. The analysis module 603 is used to analyze the peak values of each frequency range of the in-vehicle noise and vibration and the out-vehicle pipeline vibration according to the total sound pressure level of the noise and the square root value of the total out-vehicle vibration. The synthesis module 604 is used to synthesize the in-vehicle noise contribution amount analysis diagram of each pipeline vibration and the in-vehicle vibration contribution amount analysis diagram of each pipeline vibration according to the square root value of the total out-vehicle vibration and the square root value of the total in-vehicle vibration.

[0038] In some embodiments, the layout module 601 includes:

[0039] ​The first arrangement unit is used for placing the target whole vehicle in the sound attenuation chamber by moving the rotating hub; The second arrangement unit is used for mounting a plurality of vibration sensors on the water pump front pipeline, the water pump rear pipeline, the water pump itself, the main driver seat guide rail and the steering wheel of the target whole vehicle respectively. The third arrangement unit is used for mounting a plurality of noise sensors on the main driver left ear, the main driver right ear, the right rear row left ear and the right rear row right ear of the target whole vehicle respectively.

[0040] In some embodiments, the preset test working condition comprises turning on the air conditioner to the lowest temperature and the smallest air volume mode In some embodiments, the test module 602 comprises: The test unit is used for performing the out-of-vehicle vibration test, the in-vehicle vibration test and the in-vehicle noise test on the target whole vehicle according to the preset test working condition. The noise calculation unit is used for measuring a plurality of A-weighted overall sound pressure levels by using the plurality of noise sensors, and calculating the noise overall sound pressure level under the preset test working condition according to the plurality of A-weighted overall sound pressure levels. The out-of-vehicle vibration calculation unit is used for measuring a plurality of in-vehicle vibration square root values and a plurality of out-of-vehicle vibration square root values by using the plurality of vibration sensors. The in-vehicle vibration calculation unit is used for calculating the total in-vehicle vibration square root value under the preset test working condition according to the plurality of in-vehicle vibration square root values. The out-of-vehicle vibration calculation unit is used for calculating the total out-of-vehicle vibration square root value under the preset test working condition according to the plurality of out-of-vehicle vibration square root values.

[0041] It should be noted that the above-mentioned explanation and description of the test method embodiment of the contribution of the pipeline under the whole vehicle state to the in-vehicle NVH performance is also applicable to the test device of the contribution of the pipeline under the whole vehicle state to the in-vehicle NVH performance of this embodiment, which will not be described here.

[0042] The test device of the contribution of the pipeline under the whole vehicle state to the in-vehicle NVH performance provided by the embodiment of the present application performs the noise and vibration test of the in-vehicle fixed point, simultaneously analyzes the influence and contribution of a plurality of complex pipelines under the whole vehicle state to the in-vehicle noise and vibration in the full frequency range, and finally draws the contribution analysis diagram of the pipeline to the in-vehicle noise and vibration in the full frequency range. The test method is relatively simple, and the result is more comprehensive and accurate.

[0043] Figure 7 A structure schematic diagram of an electronic device provided by an embodiment of the present application. The electronic device can include: The memory 701, the processor 702, and the computer program stored in the memory 701 and executable on the processor 702.

[0044] The processor 702 implements the test method of the contribution of the pipeline to the in-vehicle NVH performance in the whole vehicle state provided in the above embodiments when executing a program.

[0045] Further, the electronic device further comprises: The communication interface 703 is configured to communicate between the memory 701 and the processor 702.

[0046] The memory 701 is configured to store a computer program executable on the processor 702.

[0047] The memory 701 can include a high-speed RAM memory, and can further include a non-volatile memory, for example, at least one disk memory.

[0048] If the memory 701, the processor 702 and the communication interface 703 are independently implemented, the communication interface 703, the memory 701 and the processor 702 can be connected to each other through a bus and complete the communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 7 Only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0049] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can complete the communication between each other through an internal interface.

[0050] The processor 702 can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0051] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the program is executed by the processor to implement the test method of the contribution of the pipeline to the in-vehicle NVH performance in the whole vehicle state as above.

[0052] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, the usage of "first", "second" and the like does not indicate any importance, but rather distinguishes one element from another. Thus, a "first" and "second" feature can include the same or similar features.

[0053] Furthermore, the terms "first", "second", etc. are used herein only to describe various steps or claim elements and do not imply a particular order or chronology of such steps or elements. Thus, these terms are used herein merely to distinguish one claim element from another. Moreover, these terms can be used interchangeably with the terms "step 1", "step 2", etc., or "element A", "element B", etc., as the context can dictate.

[0054] Any process or method descriptions or blocks in flow charts or otherwise described herein represent embodiments of processes and / or methods that can be employed, the processes and / or methods can be terminated at any time, and need not necessarily be performed in any specific order, unless specifically stated otherwise or the order is clearly implied by the context. Also, any process or method blocks can represent a module, segment, or portion of code that includes one or more executable instructions for implementing the specified logical function(s).

[0055] The logic and / or steps represented in the flowcharts and / or described herein, for example, can be considered as a sequence of executable instructions stored in a computer readable medium, which can be executed by an instruction execution system, apparatus or device, such as a computer-based system, a processor-based system, or other system that can fetch the instructions from the instruction execution system, apparatus or device and execute the instructions, or a combination of the above. For the purposes of this specification, a "computer readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus or device. The computer readable medium can be a computer readable storage medium or a computer readable signal medium. The computer readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a propagation medium. The computer readable signal medium can include, but is not limited to, a computer readable medium that facilitates transfer of the program from one place to another. A specific example of a computer readable medium is a non-transitory computer-readable storage medium. A specific example of a computer readable signal medium is a source or destination of the computer readable medium. Another specific example of a computer readable signal medium is a computer readable signal travelling through space. Thus, a computer readable medium can take many forms of hardware to carry out the program for use by or in connection with the instruction execution system, apparatus or device.

[0056] It should be understood that aspects of the application can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware and in another embodiment, the hardware can be implemented with any or a combination of the following technologies, which are all well known in the art: a discrete logic circuit(s) having logic gates for implementing logic functions upon an application of data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), etc.

[0057] Those of skill in the art would understand that information and signals can be represented using any of a variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0058] In addition, each function unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software function module. When the integrated module is realized in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0059] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method for testing the contribution of piping to in-vehicle NVH performance under vehicle conditions, characterized in that, Includes the following steps: The target vehicle is placed in an anechoic chamber, and multiple vibration sensors and multiple noise sensors are installed inside the target vehicle. The target vehicle is subjected to noise and vibration tests according to the preset test conditions to obtain the total sound pressure level, the root sum of squares of the total in-vehicle vibration, and the root sum of squares of the total external vibration. Analyze the peak values ​​of in-vehicle noise and vibration and external pipeline vibration at each frequency band based on the total sound pressure level and the root sum of squares of the total external vibration. Based on the root sum of squares of the total external vibration and the root sum of squares of the total internal vibration, we synthesize the analysis charts of the contribution of each pipeline vibration to the internal noise and the analysis charts of the contribution of each pipeline vibration to the internal vibration.

2. The method for testing the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 1, characterized in that, The step of placing the target vehicle in an anechoic chamber and installing multiple vibration sensors and multiple noise sensors inside the target vehicle includes: The target vehicle is placed in the anechoic chamber by moving the rotating hub; The multiple vibration sensors are respectively installed on the water pump front pipeline, water pump rear pipeline, water pump itself, driver's seat guide rail and steering wheel of the target vehicle; The multiple noise sensors are respectively installed in the driver's left ear, driver's right ear, right rear left ear, and right rear right ear positions of the target vehicle.

3. The method for testing the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 1, characterized in that, The preset test conditions include turning the air conditioner to the lowest temperature and lowest airflow mode.

4. The method for testing the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 1, characterized in that, The step of conducting noise and vibration tests on the target vehicle according to preset test conditions to obtain the total sound pressure level and the root sum of squares of the total vibration includes: The target vehicle is subjected to external vibration test, internal vibration test and internal noise test according to the preset test conditions. The multiple noise sensors are used to measure multiple A-weighted total sound pressure levels, and the total noise sound pressure level under the preset test conditions is calculated based on the multiple A-weighted total sound pressure levels. The multiple vibration sensors were used to measure multiple root-square values ​​of in-vehicle vibrations and multiple root-square values ​​of out-of-vehicle vibrations. Calculate the total root sum of squares of in-vehicle vibrations under the preset test conditions based on the multiple root sum of squares values ​​of in-vehicle vibrations. The total root sum of squares of external vibrations under the preset test conditions is calculated based on the multiple root sum of squares of external vibrations.

5. A testing device for the contribution of pipelines to the NVH performance of a vehicle under full vehicle conditions, characterized in that, include: The deployment module is used to place the target vehicle in an anechoic chamber and deploy multiple vibration sensors and multiple noise sensors inside the target vehicle. The testing module is used to perform noise and vibration tests on the target vehicle according to preset test conditions, so as to obtain the total sound pressure level, the root sum of squares of total in-vehicle vibration, and the root sum of squares of total external vehicle vibration. The analysis module is used to analyze the peak values ​​of in-vehicle noise and vibration and external pipeline vibration at each frequency band based on the total sound pressure level and the root sum of squares of the total external vibration. The synthesis module is used to synthesize, based on the root sum of squares of the total external vibration and the root sum of squares of the total internal vibration, a graph showing the contribution of each pipeline vibration to the internal noise and a graph showing the contribution of each pipeline vibration to the internal vibration.

6. The testing device for the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 5, characterized in that, The deployment module includes: The first deployment unit is used to place the target vehicle into the anechoic chamber by moving the rotating hub; The second deployment unit is used to install the multiple vibration sensors on the water pump front pipeline, water pump rear pipeline, water pump itself, driver's seat rail and steering wheel of the target vehicle respectively; The third deployment unit is used to install the multiple noise sensors at the driver's left ear, driver's right ear, right rear left ear, and right rear right ear positions of the target vehicle.

7. The testing device for the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 5, characterized in that, The preset test conditions include turning the air conditioner to the lowest temperature and lowest airflow mode.

8. The testing device for the contribution of pipelines to in-vehicle NVH performance under vehicle conditions as described in claim 5, characterized in that, The testing module includes: The testing unit is used to perform external vibration testing, internal vibration testing, and internal noise testing on the target vehicle according to preset test conditions. The noise calculation unit is used to measure multiple A-weighted total sound pressure levels using the multiple noise sensors, and to calculate the total noise sound pressure level under the preset test conditions based on the multiple A-weighted total sound pressure levels. The vehicle exterior vibration calculation unit is used to measure multiple root-square values ​​of in-vehicle vibrations and multiple root-square values ​​of external vibrations using the multiple vibration sensors; The in-vehicle vibration calculation unit is used to calculate the total in-vehicle vibration root sum of squares under the preset test conditions based on the multiple in-vehicle vibration root sum of squares values. The total root sum of squares of external vibrations under the preset test conditions is calculated based on the multiple root sum of squares of external vibrations.

9. An electronic device, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for testing the contribution of piping to in-vehicle NVH performance in a vehicle state as described in any one of claims 1-4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the test method for the contribution of pipelines to the NVH performance of the vehicle under the whole vehicle condition as described in any one of claims 1-4.

Images