Vibration noise testing system and method

Abstract

The application relates to the technical field of vehicles, in particular to a vibration noise test system and method, which comprises a test bench for fixing a cooling fan and a balancing piece arranged on the cooling fan; a data acquisition piece arranged on the cooling fan and a steering wheel, the data acquisition piece being used for collecting first vibration data of the steering wheel, noise data and second vibration data of the cooling fan; and a control piece connected with the data acquisition piece and the balancing piece, the control piece being used for determining the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to current test requirements, and obtaining a test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that related technologies cannot analyze the different influences of different vibration levels of the cooling fan on the vehicle, the test process period is long, and the test efficiency and evaluation effect are affected are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vibration noise test system and method. BACKGROUND

[0002] With the gradual increase of the market demand for hybrid vehicles and pure electric vehicles, the demand function of vehicle thermal management will also face great challenges. In order to avoid the influence of insufficient cooling or excessive cooling of the vehicle engine on the heat dissipation effect and performance of the engine, it is particularly important to evaluate and test the NVH (Noise, Vibration, Harshness) level problem of the cooling fan.

[0003] In related technologies, in the process of evaluating and testing the NVH level problem of the cooling fan, fan samples with different dynamic and static, unbalance amount and runout amount are often selected on the production line, and then batch testing is performed on these fan samples, so as to select fan samples meeting the use requirements from the tested fan samples.

[0004] However, the above method cannot guarantee the testing and evaluation accuracy of the fan samples, cannot analyze the influence of different vibration levels of the cooling fan on the vehicle, and the testing and evaluation process is long, which cannot quickly respond to the temporary needs of vehicle use, thereby affecting the development cost, efficiency and evaluation effect of vehicle thermal management. SUMMARY

[0005] The present application provides a vibration noise test system and method to solve the problems that related technologies cannot analyze the influence of different vibration levels of the cooling fan on the vehicle, and the testing process is long, thereby affecting the testing efficiency and evaluation effect.

[0006] The first aspect embodiment of the present application provides a vibration noise test system, comprising:

[0007] a test bench for fixing a cooling fan and a balancing piece arranged on the cooling fan;

[0008] a data acquisition piece arranged on the cooling fan and a steering wheel, the data acquisition piece being configured to acquire first vibration data of the steering wheel, noise data and second vibration data of the cooling fan; and

[0009] a control piece connected with the data acquisition piece and the balancing piece respectively, the control piece being configured to determine the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current testing requirement, and obtain a testing result of the cooling fan according to the first vibration data, the noise data and the second vibration data.

[0010] Optionally, the data acquisition unit comprises:

[0011] a plurality of vibration acquisition units, respectively arranged at a plurality of mounting points of the cooling fan, a center position of the motor and a 12 o'clock position of the steering wheel, the plurality of vibration acquisition units acquiring first vibration data of the steering wheel and second vibration data of the cooling fan;

[0012] at least one noise acquisition unit arranged corresponding to a position of a right ear of the driver, the at least one noise acquisition unit acquiring noise data of the cooling fan.

[0013] Optionally, the vibration acquisition unit is a vibration sensor, and the noise acquisition unit is a noise sensor.

[0014] Optionally, the vibration noise test system further comprises:

[0015] a power supply unit connected to the cooling fan, the power supply unit supplying power for the cooling fan.

[0016] Optionally, the vibration noise test system further comprises:

[0017] a signal generator connected to the cooling fan, the signal generator being configured to generate a rotating speed signal of the cooling fan, so as to control rotation of the cooling fan according to the rotating speed signal.

[0018] Optionally, the vibration noise test system further comprises:

[0019] an adjusting unit connected to the control unit and the balancing unit, the control unit controlling the adjusting unit to adjust a mass of the balancing unit and a distance from the balancing unit to a center of the motor of the cooling fan according to a current test requirement.

[0020] Optionally, the vibration noise test system further comprises:

[0021] a display unit connected to the control unit, the display unit being configured to display a test result of the cooling fan.

[0022] Optionally, a rigid body modal vibration frequency of the cooling fan is less than or equal to 10 Hz.

[0023] Optionally, the vibration noise test system further comprises:

[0024] a communication module connected to the display unit, the communication module being configured to send the test result of the cooling fan to a preset mobile terminal.

[0025] The vibration noise test system according to the embodiment of the present application comprises a test bench for fixing the cooling fan, a balancing piece arranged on the cooling fan, a data acquisition piece arranged on the cooling fan and the steering wheel, for collecting the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan, and a control piece connected with the data acquisition piece and the balancing piece respectively, for determining the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement, and obtaining the test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that the related art cannot analyze the different influences of the cooling fan with different vibration levels on the vehicle, and the test process is long, thereby affecting the test efficiency and evaluation effect, are solved. The balancing piece is added to the cooling fan, so as to adjust the unbalance of the cooling fan and change the vibration of the cooling fan, and thus the vibration noise of the vehicle corresponding to the vibration level of the cooling fan can be obtained.

[0026] The second aspect of the present application provides a vibration noise test method, using the vibration noise test system as described above, wherein the method comprises the following steps:

[0027] Obtaining the current test requirement of the cooling fan;

[0028] Determining the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement; and

[0029] Collecting the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan, and obtaining the test result of the cooling fan according to the mass of the balancing piece, the distance from the balancing piece to the motor center of the cooling fan, the first vibration data, the noise data and the second vibration data.

[0030] The vibration noise test method according to the embodiment of the present application comprises a test bench for fixing the cooling fan, a balancing piece arranged on the cooling fan, a data acquisition piece arranged on the cooling fan and the steering wheel, for collecting the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan, and a control piece connected with the data acquisition piece and the balancing piece respectively, for determining the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement, and obtaining the test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that the related art cannot analyze the different influences of the cooling fan with different vibration levels on the vehicle, and the test process is long, thereby affecting the test efficiency and evaluation effect, are solved. The balancing piece is added to the cooling fan, so as to adjust the unbalance of the cooling fan and change the vibration of the cooling fan, and thus the vibration noise of the vehicle corresponding to the vibration level of the cooling fan can be obtained.

[0031] 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 / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the application will become apparent and be well understood from the following description, taken in conjunction with the drawings, wherein:

[0033] Figure 1 A schematic diagram of a vibration noise test system according to an embodiment of the application;

[0034] Figure 2 A schematic diagram of a fan sensor arrangement according to an embodiment of the application;

[0035] Figure 3 A schematic diagram of a whole vehicle sensor arrangement according to an embodiment of the application;

[0036] Figure 4 A schematic diagram of a cooling fan balance block installation position and distance according to an embodiment of the application;

[0037] Figure 5 A schematic diagram of different fan vibration corresponding to in-vehicle vibration noise spectrum according to an embodiment of the application;

[0038] Figure 6 A schematic diagram of a whole method according to an embodiment of the application;

[0039] Figure 7 A schematic diagram of a vibration noise test method according to an embodiment of the application. DETAILED DESCRIPTION

[0040] Embodiments of the application are described in detail below with reference to the attached drawing figures, wherein the embodiments of the application are shown as examples. The embodiments of the application will be described with reference to the following drawings, in which the same or similar elements are referred to with the same reference numerals, and:

[0041] The vibration noise test system and method of the embodiments of the present application are described below with reference to the accompanying drawings. In view of the problems that the related technologies mentioned in the background art cannot analyze the influence of different vibration levels of the cooling fan on the vehicle, and the test process is long, thereby affecting the test efficiency and evaluation effect, the present application provides a vibration noise test system. In the system, a test bench for fixing the cooling fan and a balancing piece arranged on the cooling fan are included; a data acquisition piece arranged on the cooling fan and the steering wheel is arranged to collect first vibration data of the steering wheel, and noise data and second vibration data of the cooling fan; a control piece connected with the data acquisition piece and the balancing piece respectively is arranged to determine the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement, and obtain the test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that the related technologies cannot analyze the influence of different vibration levels of the cooling fan on the vehicle, and the test process is long, thereby affecting the test efficiency and evaluation effect, are solved. By adding the balancing piece to the cooling fan, the unbalance of the cooling fan is adjusted to change the vibration of the cooling fan, so that the noise of the vehicle can be obtained according to the vibration level of the cooling fan.

[0042] Specifically, Figure 1 A schematic diagram of a vibration noise test system provided by the embodiments of the present application is shown.

[0043] As Figure 1 shown, the vibration noise test system 10 includes a test bench 100, a cooling fan 200, a balancing piece 300, a data acquisition piece 400 and a control piece 500.

[0044] The test bench 100 is used to fix the cooling fan 200, and the balancing piece 300 (for example, a balancing block) is arranged on the cooling fan 200. The data acquisition piece 400 is arranged on the cooling fan 200 and the steering wheel, and is used to collect first vibration data of the steering wheel, and noise data and second vibration data of the cooling fan 200. The control piece 500 is connected with the data acquisition piece 400 and the balancing piece 300 respectively, so as to determine the mass of the balancing piece 300 and the distance from the balancing piece 300 to the motor center (for example, ⑤) of the cooling fan 200 according to the current test requirement, and obtain the test result of the cooling fan 200 according to the first vibration data, the noise data and the second vibration data. Figure 2

[0045] Specifically, in order to test the influence of different vibration noise levels of the cooling fan 200 on the vehicle, the embodiments of the present application need to test and adjust the vibration noise level of the cooling fan 200 according to the user's requirement, so as to quickly test and evaluate the vibration noise level of the cooling fan 200 under complete basic test conditions, thereby meeting the user's use requirement. ​

[0046] Optionally, the data acquisition device 400 comprises: a plurality of vibration acquisition units, the plurality of vibration acquisition units are respectively arranged at a plurality of mounting points of the cooling fan 200, a center position of the motor and a 12 o'clock position of the steering wheel, the plurality of vibration acquisition units acquire first vibration data of the steering wheel and second vibration data of the cooling fan 200; and at least one noise acquisition unit corresponding to a right ear position of the driver, the at least one noise acquisition unit acquires noise data of the cooling fan 200.

[0047] Optionally, the vibration noise test system 10 further comprises a signal generator connected to the cooling fan 200, the signal generator is configured to generate a rotating speed signal of the cooling fan 200, so as to control rotation of the cooling fan 200 according to the rotating speed signal.

[0048] Specifically, as shown in Figure 2 and Figure 3 , during the vibration noise level test of the cooling fan 200, the present application needs related test equipment and test preparation work. For example, the test equipment can include a test bench 100, a cooling fan 200, a balancing device 300, a data acquisition device 400, a control device 500, a power supply device, a signal generator display device and a multimeter. The data acquisition device 400 comprises a plurality of vibration acquisition units and at least one noise acquisition unit. The plurality of vibration acquisition units can be vibration sensors, which are respectively arranged at a plurality of mounting points (for example, four mounting points) on the cooling fan 200, a center position of the motor and a 12 o'clock position of the steering wheel, so as to acquire first vibration data of the steering wheel and second vibration data of the cooling fan 200. The at least one noise acquisition unit can be a noise sensor, which is arranged corresponding to a right ear position of the driver, so as to acquire noise data of the cooling fan 200.

[0049] Further, after the test equipment is prepared, the present application needs to further prepare the test preparation work. First, a semi-anechoic chamber (background noise below 25 decibels) is selected, and four mounting points of the cooling fan 200 are arranged in the semi-anechoic chamber. Figure 2The upper left mounting point ①, the lower left mounting point ②, the upper right mounting point ③ and the lower right mounting point ④ are constrained on the test bench 100 by the elastic rope ⑥ to ensure that the rigid modal vibration frequency of the constrained cooling fan 200 is less than or equal to 10 Hz, so as to avoid affecting in the test process; secondly, a plurality of vibration acquisition units are arranged at the four mounting points of the cooling fan 200, the center position of the motor and the 12 o'clock position of the steering wheel according to the coordinate direction of the vehicle, to acquire the first vibration data of the steering wheel and the second vibration data of the cooling fan 200, and the plurality of vibration acquisition units are sequentially connected to the data acquisition device 400, and the data acquisition device 400 is connected with a display device (such as a collection computer), so as to debug the data acquisition device 400 through the collection computer; finally, the cooling fan 200 is connected with a power supply device and a signal generator, so as to supply power to the cooling fan 200 by the power supply device, and generate a rotating speed signal of the cooling fan 200 by the signal generator, so as to control the cooling fan 200 to rotate normally according to the rotating speed signal.

[0050] Specifically, after the test preparation work is prepared, the vibration noise test of the cooling fan 200 is started. During the test, first, after the cooling fan 200 is connected with the power supply device and the signal generator, the cooling fan 200 is controlled by the signal generator to adjust to the test requirement rotating speed according to the current test requirement, and the vibration data and noise data of the steering wheel and the cooling fan 200 at the initial time are started to be tested, so as to obtain the first basic data of the cooling fan 200, that is, the vibration data and noise data of the cooling fan 200 at the initial time in the first vibration data of the steering wheel and the second vibration data of the cooling fan 200; then, as shown in Figure 4 a piece of fan blade to be tested (such as Figure 2 indicated by ⑦) is randomly selected in the cooling fan 200, and a balance piece 300 with a known weight m is added at a specific position of the fan blade to be tested, for example, a balance piece 300 with a weight of m is added at a position r away from the center position of the motor, then, based on the selected fan blade to be tested and the placed balance piece 300, the vibration data and noise data of the steering wheel and the cooling fan 200 after the balance piece 300 is added are tested, so as to obtain the second basic data of the cooling fan 200, that is, the vibration data and noise data of the cooling fan 200 after the balance piece 300 is added in the first vibration data of the steering wheel and the second vibration data of the cooling fan 200; finally, according to the obtained first basic data and second basic data of the cooling fan 200, the radial first-order vibration (root mean square value) of the motor center is compared, if the vibration data of the cooling fan 200 after the balance piece 300 is added is larger, the first basic data of the cooling fan 200 is taken as the reference data.

[0051] Optionally, the vibration noise test system 10 described above further comprises an adjusting member, which is connected with the control member 500 and the balancing member 300 respectively, and the control member 500 controls the adjusting member to adjust the mass of the balancing member 300 and the distance from the balancing member 300 to the motor center of the cooling fan 200 according to the current test requirement.

[0052] Further, in order to test whether the vibration noise level of the cooling fan 200 meets the design requirement and the user's vibration noise requirement for the vehicle, the embodiment of the present application needs to perform vibration noise test and evaluation of the cooling fan 200 under the whole vehicle state after obtaining the current test requirement, so as to realize the vibration noise situation in the vehicle corresponding to multiple vibration levels of the cooling fan 200, and thus the advantages and disadvantages of the vibration noise of the cooling fan 200 can be compared and evaluated intuitively and efficiently, so that the user can make more accurate evaluation on the vibration noise of the cooling fan 200.

[0053] Specifically, according to the current test requirement, the embodiment of the present application can quickly formulate different vibration requirements required by the user by adjusting the mass m of the balancing member 300 and the distance r from the balancing member 300 to the motor center of the cooling fan, and make corresponding marks. For example, if the current test of the embodiment of the present application needs greater vibration, the balancing member 300 can be adjusted on the to-be-tested blade b, that is, the mass m of the balancing member 300 is increased alone, or the position r of the balancing member 300 to the motor center of the cooling fan 200 is increased alone, or the mass m of the balancing member 300 and the position r of the balancing member 300 to the motor center of the cooling fan 200 are increased simultaneously; if the current test needs smaller vibration, the balancing member 300 arranged on the to-be-tested blade b can be removed, and the balancing member 300 is added on the to-be-tested blade c which is symmetrical or adjacent to the to-be-tested blade b, and the balancing member 300 is adjusted accordingly, that is, the mass m of the balancing member 300 is reduced alone, or the position r of the balancing member 300 to the motor center of the cooling fan 200 is reduced alone, or the mass m of the balancing member 300 and the position r of the balancing member 300 to the motor center of the cooling fan 200 are reduced simultaneously. Wherein, the expression can be represented as:

[0054] F = m1*ω 2 *r1 = M*a;

[0055] m1*r1 = M*a / ω 2 = 900*M*a / (π*n) 2 ;

[0056] Wherein, M is the mass of the cooling fan 200, a is the radial first-order acceleration of the cooling fan 200, n is the speed, m is the mass of the balancing member 300, r is the distance from the balancing member 300 to the motor center of the cooling fan, and ω is the angular speed of the fan.

[0057] For example, this embodiment of the application can quickly select the installation orientation of the balancing component 300 according to the different vibration requirements required by the user. For instance, this embodiment of the application requires vibration noise data for five different vibration requirements of the cooling fan 200. At this time, the five different vibration requirements can be marked as V1 (orientation b, balancing component 300m1, position r1 of balancing component 300 to the center of the motor of cooling fan 200), V2 (orientation c, balancing component 300m2, position r2 of balancing component 300 to the center of the motor of cooling fan 200), and V3 (orientation d, balancing component 300m3, position r1 of balancing component 300 to the center of the motor of cooling fan 200). 3） V4 (orientation e, balancer 300m4, position r4 of balancer 300 to the motor center of cooling fan 200) and V5 (orientation f, balancer 300m5, position r5 of balancer 300 to the motor center of cooling fan 200) are marked. After marking, the cooling fan 200 is installed in the vehicle, and the in-vehicle vibration and noise levels corresponding to the five different vibration requirements V1, V2, V3, V4, and V5 of the cooling fan 200 are evaluated. That is, when evaluating V1, the position r1 of the tested fan blade b, balancer 300m1, and the position r1 of the balancer 300 to the motor center of cooling fan 200 can be quickly identified to obtain the in-vehicle vibration and noise level under that installation orientation; when evaluating V2, the position r2 of the tested fan blade c, balancer 300m2, and the position r2 of the balancer 300 to the motor center of cooling fan 200 can be quickly identified to obtain the vibration and noise level under that installation orientation. The corresponding vehicle interior vibration and noise levels can be determined by: When evaluating V3, the position r3 of the tested fan blade d, the balance component 300m3, and the motor center r3 of the balance component 300 to the cooling fan 200 can be quickly determined to obtain the corresponding vehicle interior vibration and noise level for that installation orientation; when evaluating V4, the position r4 of the tested fan blade e, the balance component 300m4, and the motor center r4 of the balance component 300 to the cooling fan 200 can be quickly determined to obtain the corresponding vehicle interior vibration and noise level for that installation orientation; when evaluating V5, the position r5 of the tested fan blade f, the balance component 300m5, and the motor center r5 of the balance component 300 to the cooling fan 200 can be quickly determined to obtain the corresponding vehicle interior vibration and noise level for that installation orientation. Based on the obtained vehicle interior vibration and noise levels for each installation orientation, users can make a more accurate assessment of the vibration and noise of the cooling fan 200.

[0058] It should be noted that if the user raises other vibration and noise requirements during the testing process, the system will continue to adjust the mass of the balancer 300 and the position of the balancer 300 relative to the center of the cooling fan 200 motor until the user's current testing requirements are met.

[0059] Furthermore, such as Figure 5and Table 1, the test vibration data of two groups of different cooling fans 200 selected by the embodiments of the application and the corresponding vehicle internal vibration noise and subjective evaluation results are shown, wherein V1 is line (corresponding to the first order vibration of the cooling fan 200 being too large), and V2 is line, so as to reflect the precise guidance of the application embodiments to the actual development work according to the objectively obtained test vibration data and subjective evaluation results.

[0060] Table 1

[0061]

[0062] It should be noted that the subjective evaluation of the embodiments of the application adopts a 10-point system, and 6 points or less is unacceptable, 6 points or more is acceptable, and 7 points is good. Finally, the test requirement adopts a sample of vibration V2 level, and is controlled according to the V2 level.

[0063] Optionally, the vibration noise test system 10 described above further comprises a display piece connected with the control piece 500, used for displaying the test results of the cooling fan 200.

[0064] The embodiments of the application obtain the test results of the cooling fan 200 based on the mass of the balance piece 300, the distance from the balance piece 300 to the motor center of the cooling fan 200, the first vibration data, the noise data and the second vibration data, and display the test results of the cooling fan 200 through the display piece, so as to facilitate the user to view the test results. At the same time, the embodiments of the application can also send the test results of the cooling fan 200 to a preset mobile terminal, such as a mobile phone terminal, a vehicle display screen terminal or other mobile terminals, through a communication module, so as to remind the user in real time about the corresponding vehicle internal vibration noise of the cooling fan 200 under different vibration noise levels.

[0065] Therefore, in order to make the person skilled in the art more intuitively understand the specific implementation process of the embodiments of the application, the following will be based on Figure 6 specific description.

[0066] Step S601, the vibration requirement of the cooling fan 200 is proposed;

[0067] Step S602, the test bench 100 is built;

[0068] Step S603, the basic state of the test cooling fan 200 is tested;

[0069] Step S604, the mass of the balance piece 300 with known mass and distance is randomly selected for the fan blade of the cooling fan 200;

[0070] Step S605, adjust the mass m and mounting distance r of the balancing member 300 to obtain different vibration combination schemes, and mark them;

[0071] Step S606, install the cooling fan to the vehicle;

[0072] Step S607, perform vehicle test and evaluation according to the current test requirement;

[0073] Step S608, if other vibration requirements are temporarily proposed, return to step S605;

[0074] Step S609, evaluation decision, and draw a conclusion.

[0075] In summary, based on the specific discussion of the above embodiments, the embodiments have the following advantages:

[0076] (1) The embodiments provided in the actual design, process and material basis conditions, determine the vibration requirements of the customer through the test bench 100, and quickly perform the vibration noise test and evaluation of the cooling fan 200 in the whole vehicle state, thereby improving the efficiency of the evaluation determination, evaluation and problem troubleshooting of the vibration requirements of the cooling fan 200 (about 93% can be improved), and further saving the test cost (about 95% can be saved), and shortening the development cycle.

[0077] (2) The embodiments meet the user's requirements that the same vehicle can complete the vibration noise situation of the cooling fan 200 corresponding to not less than three vibration levels in the preset time (for example, 10 minutes), avoid the situation that the subjective feeling is forgotten and unreal due to long time replacement, and can compare and evaluate and feel the vibration noise of the cooling fan 200 more intuitively and efficiently, so as to make the user make more accurate evaluation on the vibration noise of the cooling fan 200.

[0078] (3) The embodiments can meet the requirements of the whole vehicle by adjusting a single variable, provide a reference for the index requirements of any blade of the cooling fan 200, and have certain guiding significance.

[0079] According to the vibration noise test system provided in the embodiments of the present application, the test bench for fixing the cooling fan and the balancing piece arranged on the cooling fan are provided; the data acquisition piece arranged on the cooling fan and the steering wheel is arranged to acquire the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan; the control piece connected with the data acquisition piece and the balancing piece respectively is arranged to determine the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement, and to obtain the test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that the related art cannot analyze the different influences of the cooling fan with different vibration levels on the vehicle, and the test process is long, thereby affecting the test efficiency and the evaluation effect, etc. are solved. The balancing piece is added to the cooling fan to adjust the unbalance of the cooling fan and change the vibration of the cooling fan, so that the noise of the vehicle corresponding to the vibration level of the cooling fan can be obtained.

[0080] Secondly, the vibration noise test method provided in the embodiments of the present application is described with reference to the accompanying drawings.

[0081] Figure 7 is the flowchart of the vibration noise test method in the embodiments of the present application.

[0082] As Figure 7 shown, the vibration noise test method uses the vibration noise test system as described above, wherein the method comprises the following steps:

[0083] In step S701, the current test requirement of the cooling fan is acquired.

[0084] In step S702, the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan are determined according to the current test requirement; and

[0085] In step S703, the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan are acquired, and the test result of the cooling fan is obtained according to the mass of the balancing piece, the distance from the balancing piece to the motor center of the cooling fan, the first vibration data, the noise data and the second vibration data.

[0086] According to the vibration noise test method, the test bench for fixing the cooling fan and the balancing piece arranged on the cooling fan are provided; the data acquisition piece arranged on the cooling fan and the steering wheel is arranged to acquire the first vibration data of the steering wheel, the noise data and the second vibration data of the cooling fan; the control piece connected with the data acquisition piece and the balancing piece respectively is used to determine the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to the current test requirement, and obtain the test result of the cooling fan according to the first vibration data, the noise data and the second vibration data. Thus, the problems that the related technology cannot perform relevant analysis according to the different influences of the cooling fan on the vehicle at different vibration levels, and the test process period is long, thereby affecting the test efficiency and evaluation effect are solved, the balancing piece is added to the cooling fan, the unbalance of the cooling fan is adjusted, and the vibration condition of the cooling fan is changed, so that the vibration noise condition of the vehicle can be obtained according to the vibration level of the cooling fan.

[0087] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0088] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0089] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions (or steps) in the process, and the preferred embodiments of the present application include additional implementations in which the order of the steps can differ from those shown or discussed, including a process performed substantially concurrently or in reverse order, depending on the functionality involved. The application described herein can be implemented in an operating environment comprising software modules.

[0090] The logic and / or steps represented in the flowcharts and / or described herein, for example, can be considered as a sequence of instructions to implement logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device, such as a computer-based system, processor- based system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For 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 be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include the following: an electrical connection having one or more wires (electrical connections), a portable computer diskette (a magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CD-ROM). In addition, the computer-readable medium can even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

[0091] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations 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. As such, if implemented in hardware, and in another embodiment, any of the following technologies, known in the art, or their combinations can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

[0092] Those skilled in the art can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing related hardware, and the programs can be stored in a computer-readable storage medium. When the programs are executed, they include one or a combination of the steps of the method embodiments.

[0093] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing module, or each of the units can be physically present separately, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0094] 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 vibration noise testing system, characterized by, The vibration noise test system comprises: a test bench for fixing a cooling fan and a balancing piece arranged on the cooling fan; a data acquisition piece arranged on the cooling fan and a steering wheel, the data acquisition piece being used for acquiring first vibration data of the steering wheel, noise data and second vibration data of the cooling fan; a control piece connected with the data acquisition piece and the balancing piece respectively, the control piece being used for determining a mass of the balancing piece and a distance from the balancing piece to a motor center of the cooling fan according to current test requirements, and obtaining a test result of the cooling fan according to the first vibration data, the noise data and the second vibration data; a power supply piece connected with the cooling fan, the power supply piece being used for supplying power for the cooling fan. The data acquisition piece comprises:

2. The vibrational noise testing system of claim 1, wherein, a plurality of vibration acquisition units arranged at a plurality of mounting points of the cooling fan, a center position of the motor and a 12 o'clock position of the steering wheel, the plurality of vibration acquisition units being used for acquiring the first vibration data of the steering wheel and the second vibration data of the cooling fan; at least one noise acquisition unit arranged at a position corresponding to a right ear of a driver, the at least one noise acquisition unit being used for acquiring the noise data of the cooling fan. The vibration acquisition unit is a vibration sensor, and the noise acquisition unit is a noise sensor.

3. The vibrational noise testing system of claim 2, wherein, The vibration noise test system further comprises:

4. The vibrational noise testing system of claim 3, wherein, a signal generator connected with the cooling fan, the signal generator being used for generating a rotating speed signal of the cooling fan, so as to control rotation of the cooling fan according to the rotating speed signal. The vibration noise test system further comprises:

5. The vibrational noise testing system of claim 3, wherein, an adjusting piece connected with the control piece and the balancing piece respectively, the control piece being used for controlling the adjusting piece to adjust the mass of the balancing piece and the distance from the balancing piece to the motor center of the cooling fan according to current test requirements. The vibration noise test system further comprises:

6. The vibrational noise testing system of claim 3, wherein, a display piece connected with the control piece, the display piece being used for displaying the test result of the cooling fan. A rigid body modal vibration frequency of the cooling fan is less than or equal to 10 Hz.

7. The vibrational noise testing system of claim 2 or 3, wherein, The vibration noise test system further comprises:

8. The vibrational noise testing system of claim 2 or 3, wherein, a communication module connected with the display piece, the communication module being used for sending the test result of the cooling fan to a preset mobile terminal. The method comprises the following steps:

9. A method of vibration noise testing, characterized by, obtaining current test requirements of the cooling fan; determining a mass of the balancing piece and a distance from the balancing piece to a motor center of the cooling fan according to the current test requirements; and acquiring first vibration data of the steering wheel, noise data and second vibration data of the cooling fan, and obtaining a test result of the cooling fan according to the mass of the balancing piece, the distance from the balancing piece to the motor center of the cooling fan, the first vibration data, the noise data and the second vibration data. ​

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