阅读说明：本技术 一种车辆淋雨噪声测试系统及其测试评价方法 (Vehicle rain noise test system and test evaluation method thereof ) 是由 王志伟 宋海生 辛晓鹰 王磊 于 2020-04-14 设计创作，主要内容包括：本发明公开了一种车辆淋雨噪声测试系统及其测试评价方法,其中,测试系统包括淋雨间、设置在车辆的座椅上方的麦克风传感器、与麦克风传感器电连接的数据采集器、与数据采集器电连接的终端设备；淋雨间内上方位置设置有多条管道,沿管道长度方向均匀的连接有多个喷淋头,管道供水端连接在外接供水系统的水泵上；当车辆置于淋雨间内喷淋头下方时,喷淋头向车辆淋水,麦克风传感器将感应到的声音信号转换为电信号后传输给数据采集器,终端设备用于设置数据采集条件及数据处理分析、得出车辆淋雨噪声评价指标。本发明能够更加真实的模拟真实的淋雨场景,保证测试系统的准确性,从而得出更加准确数据值以及车辆淋雨噪声评价指标。(The invention discloses a vehicle rain noise test system and a test evaluation method thereof, wherein the test system comprises a rain room, a microphone sensor arranged above a seat of a vehicle, a data acquisition unit electrically connected with the microphone sensor and terminal equipment electrically connected with the data acquisition unit; a plurality of pipelines are arranged at the upper position in the rain room, a plurality of spray heads are uniformly connected along the length direction of the pipelines, and the water supply end of each pipeline is connected to a water pump of an external water supply system; when the vehicle is arranged below the spray header in the rain room, the spray header sprays water to the vehicle, the microphone sensor converts the sensed sound signal into an electric signal and transmits the electric signal to the data acquisition unit, and the terminal equipment is used for setting data acquisition conditions, processing and analyzing the data and obtaining vehicle rain noise evaluation indexes. The invention can simulate a real rain scene more truly and ensure the accuracy of the test system, thereby obtaining more accurate data values and evaluation indexes of the rain noise of the vehicle.)

1. A vehicle rain noise test system is characterized by comprising a rain room (1), a microphone sensor (8) arranged above a seat (11) of a vehicle (7), a data collector (9) electrically connected with the microphone sensor (8), and a terminal device (10) electrically connected with the data collector (9);

a plurality of pipelines (5) are arranged at the upper position in the rain room (1), a plurality of spray headers (6) are uniformly connected along the length direction of the pipelines (5), and the water supply end of each pipeline (5) is connected to a water pump (2) of an external water supply system;

when vehicle (7) are arranged in drenching with rain in room (1) when shower head (6) below, shower head (6) to the vehicle trickle, microphone sensor (8) transmit data collection station (9) after converting the sound signal who senses into the signal of telecommunication, terminal equipment (10) are used for setting up data acquisition condition and data processing analysis, reacing vehicle noise evaluation index of drenching with rain.

2. A vehicle rain noise test system according to claim 1, characterized in that a water pressure regulating valve is provided on each of the shower heads (6).

3. A vehicle rain noise test system according to claim 2, characterized in that the shower head (6) is detachably connected with the pipe (5), and the shower head (6) is height-adjustable.

4. A vehicle rain noise test system according to claim 3, characterized in that the aperture of the shower head (6) is three apertures, large, medium and small.

5. A vehicle rain noise test system according to claim 1, characterized in that the size of the rain booth (1) is more than 5 times the size of the vehicle (7) to be tested, and that there is no shelter inside the rain booth (1).

6. A vehicle rain noise test system according to claim 1, characterized in that the spray header (6) density in the rain room (1) is 100/m²。

7. A vehicle rain noise test system according to claim 1, characterized in that the microphone sensor (8) is arranged at a position at least 200mm away from the boundary surface of the interior space of the vehicle (7) within the vehicle (7); and adjusting the seat (11) to a rearmost and lowermost position, the seat (11) surface level, the backrest adjustment to a normal position: the up-down position of the microphone sensor (8) is 175mm away from the top of the backrest of the seat (11), the front-back position of the microphone sensor (8) is 175mm away from the front 125 and the front of the backrest of the seat (11), and the left-right position of the microphone sensor (8) is 25mm away from the middle of the seat (11).

8. A vehicle rain noise test evaluation method is characterized by comprising the following steps:

placing a microphone sensor at a position close to the upper part of a seat in a vehicle to form the arrangement of a measuring point position in the vehicle;

the vehicle is parked into a rain room, and the spraying range of the spray header can be ensured to uniformly and completely cover the vehicle roof;

connecting the microphone sensor with a data collector, and connecting the data collector with terminal equipment, so that data processing software in the terminal equipment can acquire and process data collected by the data collector;

adjusting the aperture and the water pressure of the spray header to simulate small, medium and heavy rain scenes; after the rainfall is stable and the test conditions are met, starting to acquire data;

after data acquisition is finished, processing and analyzing the data, firstly, importing the acquired original data into a data analysis pool, inserting a weighting filter A into the filter pool, and simultaneously adding a high-pass filter;

and after the data processing is finished, selecting time domain total sound pressure level curves and curve fluctuation rates of the microphone sensors at the driver seat position under the three rainfall test conditions as final evaluation indexes of the rain noise.

9. The vehicle rain noise test evaluation method according to claim 8, wherein after the microphone sensor is connected to a data acquisition unit, the method further comprises:

the sampling frequency was set to 48kHz and the sensor coupling mode was selected to be AC mode.

10. The vehicle rain noise test evaluation method according to claim 8, wherein the in-vehicle test point positions satisfy the following conditions:

the arrangement position of the in-vehicle microphone sensor is at least 100-200mm away from the boundary surface of the interior space of the vehicle; and adjusting the seat to a final and lowermost position, the seat surface being horizontal, the backrest being adjusted to a normal position: the up-down position of the microphone sensor is 175mm away from the top of the seat back, the front-back position of the microphone sensor is 175mm away from the front surface of the seat back, and the left-right position of the microphone sensor is 25mm away from the middle of the seat.

Technical Field

The invention belongs to the technical field of rain noise test and evaluation, and particularly relates to a vehicle rain noise test system and a test evaluation method thereof.

Background

With the increasing demand of consumers for vehicle noise, rain noise is becoming one of the factors influencing the purchase of automobiles by consumers, especially under the current trend of vehicle electric driving, the masking effect of engine noise is lacked, and the requirements for rain noise are increasingly strict in static state and dynamic state. At present, the unified standards of laboratories, test methods and evaluation methods for rain noise tests do not exist, so that the following problems are faced in the research and development process of the vehicle and the enterprise:

1. the existing rain laboratory can not truly simulate the actual rain scene;

2. there is no standard test method available for reference and reference;

3. there is no unified standard to evaluate rain noise;

for the above reasons, the vehicle development process is short of direction, and the control capability of the rain noise is insufficient.

Disclosure of Invention

In order to overcome the problems in the related art, the invention provides a vehicle rain noise test system which comprises a rain room, a microphone sensor arranged above a seat of a vehicle, a data acquisition unit electrically connected with the microphone sensor and terminal equipment electrically connected with the data acquisition unit;

a plurality of pipelines are arranged at the upper position in the rain room, a plurality of spray heads are uniformly connected along the length direction of the pipelines, and the water supply end of each pipeline is connected to a water pump of an external water supply system;

when the vehicle is arranged in the rain room below the spray header, the spray header sprays water to the vehicle, the microphone sensor converts the sensed sound signal into an electric signal and transmits the electric signal to the data acquisition unit, and the terminal equipment is used for setting data acquisition conditions, processing and analyzing the data and obtaining the evaluation index of the rain noise of the vehicle.

Optionally, each spray header is provided with a water pressure regulating valve.

Optionally, the spray header and the pipeline are detachably connected, and the height of the spray header is adjustable.

Optionally, the aperture of the spray header is three apertures, namely a large aperture, a medium aperture and a small aperture.

Optionally, the size of the rain room is more than 5 times of the size of the vehicle to be tested, and no shielding object is arranged in the rain room.

Optionally, the density of the spray headers in the rain room is 100/m²。

Optionally, the microphone sensor is arranged at a position at least 200mm away from the boundary surface of the vehicle interior space within the vehicle; and adjusting the seat to a final and lowermost position, the seat surface being horizontal, the backrest being adjusted to a normal position: the up-down position of the microphone sensor is 175mm away from the top of the seat back, the front-back position of the microphone sensor is 175mm away from the front surface of the seat back, and the left-right position of the microphone sensor is 25mm away from the middle of the seat.

The invention also provides a method for testing and evaluating the rain noise of the vehicle, which comprises the following steps:

placing a microphone sensor at a position close to the upper part of a seat in a vehicle to form the arrangement of a measuring point position in the vehicle;

the vehicle is parked into a rain room, and the spraying range of the spray header can be ensured to uniformly and completely cover the vehicle roof;

connecting the microphone sensor with a data collector, and connecting the data collector with terminal equipment, so that data processing software in the terminal equipment can acquire and process data collected by the data collector;

adjusting the aperture and the water pressure of the spray header to simulate small, medium and heavy rain scenes; after the rainfall is stable and the test conditions are met, starting to acquire data;

after data acquisition is finished, processing and analyzing the data, firstly, importing the acquired original data into a data analysis pool, inserting a weighting filter A into the filter pool, and simultaneously adding a high-pass filter;

and after the data processing is finished, selecting time domain total sound pressure level curves and curve fluctuation rates of the microphone sensors at the driver seat position under the three rainfall test conditions as final evaluation indexes of the rain noise.

Optionally, after the microphone sensor is connected to the data collector, the method further includes:

the sampling frequency was set to 48kHz and the sensor coupling mode was selected to be AC mode.

Optionally, the positions of the in-vehicle measuring points satisfy the following conditions:

the arrangement position of the in-vehicle microphone sensor is at least 100-200mm away from the boundary surface of the interior space of the vehicle; and adjusting the seat to a final and lowermost position, the seat surface being horizontal, the backrest being adjusted to a normal position: the up-down position of the microphone sensor is 175mm away from the top of the seat back, the front-back position of the microphone sensor is 175mm away from the front surface of the seat back, and the left-right position of the microphone sensor is 25mm away from the middle of the seat.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention can simulate a real rain scene more truly, and ensure the accuracy of the test system, thereby obtaining more accurate data values and evaluation indexes of the rain noise of the vehicle, and further effectively improving the control capability of the rain noise of the vehicle.

Drawings

FIG. 1 is a schematic view of the internal structure of a rain room of a vehicle rain noise testing system provided by the invention;

FIG. 2 is a schematic view of the positions of test points inside a test vehicle according to the present invention;

FIG. 3 is a diagram of a vehicle rain noise test system provided by the present invention;

FIG. 4 is a schematic diagram of the arrangement of spray headers per square meter in a large rain scene simulation;

FIG. 5 is a schematic view of the arrangement of spray headers per square meter in a simulated mid-rain scene;

fig. 6 is a schematic diagram of the arrangement of spray headers per square meter in a simulated light rain scene.

Description of the reference numerals

The system comprises a rain room 1, a water pump 2, a fixing piece 4, a pipeline 5, a spray header 6, a large-aperture and large-hydraulic spray header 61, a medium-aperture and medium-hydraulic spray header 62, a large-aperture and medium-hydraulic spray header 63, a small-aperture and small-hydraulic spray header 64, a small-aperture and medium-hydraulic spray header 65, a vehicle 7, a microphone sensor 8, a data collector 9, a terminal device 10 and a seat 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solution of the present invention will be explained with reference to specific embodiments.

Example 1

As shown in fig. 1-3, the present embodiment provides a vehicle rain noise testing system, which includes a rain room 1, a microphone sensor 8 disposed above a seat 11 of a vehicle 7, a data collector 9 electrically connected to the microphone sensor 8, and a terminal device 10 electrically connected to the data collector 9;

a plurality of pipelines 5 are arranged at the upper position in the rain room 1, a plurality of spray headers 6 are uniformly connected along the length direction of the pipelines 5, and the water supply end of each pipeline 5 is connected to a water pump 2 externally connected with a water supply system;

when the vehicle 7 is arranged in the rain room 1 and below the spray header 6, the spray header 6 sprays water to the vehicle, the microphone sensor 8 converts the sensed sound signal into an electric signal and transmits the electric signal to the data acquisition unit 9, and the terminal device 10 is used for setting data acquisition conditions, processing and analyzing the data and obtaining the evaluation index of the rain noise of the vehicle.

The external water supply system can be a water supply pool or other water sources capable of providing water requirements for rain test, the plurality of pipelines 5 are communicated with the water pump 2 of the water supply system, and each pipeline 5 can be provided with an independent on-off water valve for conveniently and independently switching on and off each pipeline 5; the pipeline 5 may be laid by uniformly fixing and arranging the pipeline 5 on the side wall and the inner ceiling of the rain room 1 by using the fixing member 4.

The terminal device 10 may adopt a computer device equipped with LMS test.lab noise test analysis software, and the LMS test.lab noise test analysis software may complete setting of data acquisition conditions and data processing analysis, and finally obtain the vehicle rain noise evaluation index; in addition, the data acquisition unit 9 also selects data acquisition unit hardware matched with LMS test.

In order to ensure that the microphone sensor 8 can collect the noise in the vehicle more truly and accurately, the microphone sensor 8 is arranged at a position at least 200mm away from the boundary surface of the inner space of the vehicle 7 in the vehicle 7; and adjusting the seat 11 to the rearmost and lowermost positions, the seat 11 being horizontal in surface, the backrest being adjusted to the normal position: the up-down position of the microphone sensor 8 is 175-225mm away from the top of the backrest of the seat 11, the front-back position of the microphone sensor 8 is 175mm away from the front 125-175mm of the backrest of the seat 11, and the left-right position of the microphone sensor 8 is 25mm away from the middle of the seat 11; the number of the microphone sensors 8 can be adjusted according to different vehicle types, for example, two microphones are used for a commercial vehicle, and four microphones are used for a passenger vehicle.

In order to reduce the influence of a test site on a test result, the size of the rain room 1 is more than 5 times of the size of the vehicle 7 to be tested, and no shielding object is arranged in the rain room 1; in addition, the height of the spray header 6 needs to be adjustable, for example, connecting pipes with different lengths are connected between the spray header 6 and the pipeline 5 in a threaded manner, so that the height of the spray header 6 can be adjusted, and the distance from the upper end of the spray header 6 to the roof is preferably 1.3 m.

In order to simulate a real rain scene more truly and ensure the accuracy of the test system, the method obtainsMore accurate data value and evaluation index of vehicle rain noise, the density of the spray header 6 in the rain room 1 is 100/m²(ii) a Each spray header 6 is provided with a water pressure regulating valve, so that the spray water pressure of the spray header 6 can be regulated to be three water pressures of large, medium and small, for example, the large water pressure is 0.4Mpa, the medium water pressure is 0.2Mpa and the small water pressure is 0.1Mpa, and the three water pressures are used for simulating rainfall and raindrop falling speed; the aperture of the spray header 6 is designed to be large, medium and small, for example, the large aperture is about 2mm, the medium aperture is about 1mm, and the small aperture is about 0.5mm, so as to simulate the size of raindrops; in order to ensure that the aperture of the spray header 6 is changeable, the spray header 6 can be correspondingly detachably connected with the pipeline 5, for example, the spray header 6 is assembled on the pipeline 5 in a threaded connection mode, and when the spray header 6 with different apertures needs to be adapted, the original spray header is detached and replaced.

For example, the rain scene simulated by the test system is in the form of:

as shown in fig. 4, a heavy rain scene is simulated: the shower head 6 located directly above the roof to be tested is arranged as follows: sampling large aperture and large water pressure by 50% of the spray headers 6 in the region, wherein 30% of the spray headers 6 in the region are large aperture and medium water pressure, and 20% of the spray headers 6 in the region adopt medium aperture and medium water pressure;

as shown in fig. 5, a simulated mid-rain scene: the shower head 6 located directly above the roof to be tested is arranged as follows: the pore diameter of 20% of the spray headers 6 in the region is large, the water pressure is large, the pore diameter of 60% of the spray headers 6 in the region is medium, the water pressure is medium, and the pore diameter of 20% of the spray headers 6 in the region is small;

as shown in fig. 6, a rainstorm scenario is simulated: the shower head 6 located directly above the roof to be tested is arranged as follows: the aperture of 20% of the spray headers 6 in the region samples medium aperture and medium water pressure, 30% of the spray headers 6 in the region sample small aperture and medium water pressure, and 50% of the spray headers 6 in the region sample small aperture and small water pressure.

Example 2

A test evaluation method of the vehicle rain noise test system in embodiment 1 includes:

s201, placing a microphone sensor in a vehicle to form a measuring point position in the vehicle: wherein the arrangement position of the in-vehicle microphone sensor is at least 100-200mm away from the boundary surface of the interior space of the vehicle; and adjusting the seat 11 to the rearmost and lowermost positions, the seat 11 being horizontal in surface, the backrest being adjusted to the normal position: the up-down position of the microphone sensor 8 is 175-225mm away from the top of the backrest of the seat 11, the front-back position of the microphone sensor 8 is 175mm away from the front 125-175mm of the backrest of the seat 11, and the left-right position of the microphone sensor 8 is 25mm away from the middle of the seat 11;

s202, parking the vehicle into a rain room, ensuring that the spraying range of the spray header can uniformly and completely cover the roof, and adjusting the distance from the upper end of the spray header to the roof to be 1.3 m;

s203, connecting the microphone sensor with a data acquisition unit, setting the sampling frequency to be 48kHz, and selecting the sensor coupling mode to be an AC mode; connecting the data collector with a terminal computer, so that LMS test.lab noise test analysis software in the terminal computer can acquire and process the data collected by the data collector;

and S204, adjusting the aperture and the water pressure of the spray header to simulate small, medium and heavy rain scenes, wherein the testing time of each type of rain is 60min, the data acquisition is started after the rain amount is stable and the test conditions are met, and the data acquisition time is 60S each time.

S205, after the data acquisition is finished, processing and analyzing the data, firstly, importing the acquired original data into a data analysis pool, inserting an A weighting filter into the filter pool, and simultaneously adding a high-pass filter, preferably a 15Hz high-pass filter, so as to eliminate the influence of background noise, and in addition, if single-frequency background noise exists in the background environment, a band elimination filter with corresponding frequency needs to be inserted.

S206, after the data processing is finished, selecting time domain total sound pressure level curves and curve fluctuation rates of the microphone sensors at the driver seat position under the three types of rainfall test conditions as final evaluation indexes of rain noise, and using the microphone sensor data at the other positions as other auxiliary data to help the analysis of problems.

In step 204, the simulated raining scene is as follows:

as shown in fig. 4, a heavy rain scene is simulated: the shower head 6 located directly above the roof to be tested is arranged as follows: sampling large aperture and large water pressure by 50% of the spray headers 6 in the region, wherein 30% of the spray headers 6 in the region are large aperture and medium water pressure, and 20% of the spray headers 6 in the region adopt medium aperture and medium water pressure;

as shown in fig. 5, a simulated mid-rain scene: the shower head 6 located directly above the roof to be tested is arranged as follows: the pore diameter of 20% of the spray headers 6 in the region is large, the water pressure is large, the pore diameter of 60% of the spray headers 6 in the region is medium, the water pressure is medium, and the pore diameter of 20% of the spray headers 6 in the region is small;

as shown in fig. 6, a rainstorm scenario is simulated: the shower head 6 located directly above the roof to be tested is arranged as follows: the aperture of 20% of the spray headers 6 in the region samples medium aperture and medium water pressure, 30% of the spray headers 6 in the region sample small aperture and medium water pressure, and 50% of the spray headers 6 in the region sample small aperture and small water pressure.

In the step 204, when each type of test condition is performed, three times of data are continuously acquired, the LMS test.lab noise test analysis software automatically stores files in the data acquisition process, the three times of test data are compared after the acquisition is completed, the overall trend and whether abnormal points exist are observed, the three times of measurement data are stored and quitted after good consistency is ensured, and the test is finished; accordingly, after the background noise is eliminated in step 202, three data averaging processes for each type of test condition are performed as the final data result.

The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.