CN113790900B - Vehicle sound insulation performance test method and device and electronic equipment - Google Patents
Vehicle sound insulation performance test method and device and electronic equipment Download PDFInfo
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- CN113790900B CN113790900B CN202110918427.XA CN202110918427A CN113790900B CN 113790900 B CN113790900 B CN 113790900B CN 202110918427 A CN202110918427 A CN 202110918427A CN 113790900 B CN113790900 B CN 113790900B
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- 238000009413 insulation Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000011056 performance test Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 239000011358 absorbing material Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000000873 masking effect Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
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- 239000005357 flat glass Substances 0.000 description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The embodiment of the invention provides a method, a device and equipment for testing sound insulation performance of a vehicle, wherein the vehicle to be tested is placed in a preset reverberation room, and a sound source is arranged in the reverberation room so as to provide sound required by testing; then covering the sound-shielding material in a sound-shielding region other than the target region to expose the target region in the sound source; collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area; and finally, obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data. According to the invention, only the sound shielding area is required to be covered with the sound insulation and absorption material, and parts of the target area are not required to be removed from the vehicle body, so that the condition of damaging the vehicle body is avoided, the sound insulation performance test is performed by exposing the target area, a plurality of different tools are not required to be manufactured, the test period is shortened, and the cost in the test process is reduced.
Description
Technical Field
The invention relates to the technical field of sound insulation, in particular to a vehicle sound insulation performance test method and device and electronic equipment.
Background
When testing the sound insulation of a certain system on the whole vehicle, the system is generally taken down from the vehicle body, placed on a reverberation-total-cancellation sound insulation window, sounded by a sound source placed in a reverberation laboratory, tested for the size of the sound source, and then tested for the sound pressure level or sound intensity of a receiving end in the total-cancellation room, and the sound transmission loss of the system is obtained through calculation.
However, this method requires a perfect reverberation and full anechoic room, and the laboratory needs to be built adjacently, and a window needs to be provided on the middle wall surface. During testing, the part to be tested needs to be removed from the vehicle body and mounted on the window, so that the vehicle body is damaged and cannot be restored. The parts to be tested also need to be arranged on the corresponding tools to be placed in the full-elimination-reverberation window, the tools and the parts to be tested are generally connected in a threaded connection, welding, strong adhesion and other forms, and secondary damage is caused when the tools are taken down.
In addition, the fixture for clamping the parts to be tested is disposable, and different clamping fixtures are required to be arranged for different parts to be tested, so that the period of the sound insulation performance of the existing test vehicle is longer, and the test cost is higher.
Disclosure of Invention
The embodiment of the invention solves the technical problems of long period and high cost of measuring the sound insulation performance of the vehicle in the related technology by providing the method and the device for testing the sound insulation performance of the vehicle and the electronic equipment.
In a first aspect, according to an embodiment of the present invention, there is provided a method for testing sound insulation performance of a vehicle, the method including: placing a vehicle to be tested in a reverberation room, wherein a sound source is arranged in the reverberation room; covering a sound shielding material in a sound shielding region other than a target region to expose the target region in the sound source; collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area; and obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data.
Preferably, before the sound shielding region other than the target region is covered with the sound insulation and absorption material, it includes: detecting the outline of the target area to obtain first outline data; detecting the outline of the vehicle to be detected to obtain second outline data; and determining the sound shielding area according to the first contour data and the second contour data.
Preferably, the first contour data includes first geometric data and position data of the target region; the second contour data comprise second geometric data of the vehicle to be tested; the determining the sound shielding area according to the first contour data and the second contour data includes: the sound masking region is determined based on the difference between the first geometric data and the second geometric data, and the position data.
Preferably, the obtaining the sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data includes: obtaining sound insulation performance data of the target area of the vehicle to be tested based on the difference value between the first sound data and the second sound data; or obtaining sound insulation performance data of the target area of the vehicle to be tested based on the ratio of the first sound data to the second sound data.
Preferably, the acquiring the first sound data on one side of the target area and the second sound data on the other side of the target area includes: and acquiring the sound data outside the vehicle at one side of the target area and acquiring the sound data inside the vehicle at the other side of the target area.
In a second aspect, according to an embodiment of the present invention, there is provided a vehicle sound insulation performance test apparatus, the apparatus including:
a reverberation chamber in which a sound source for providing sound required for the test is provided;
a sound shielding tool for covering a sound insulation and absorption material in a sound shielding area except a target area so as to expose the target area in the sound source;
the first microphone is arranged on one side of the target area and used for collecting first sound data;
the second microphone is arranged on the other side of the target area and is used for collecting second sound data;
and the sound processing equipment is used for obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data.
Preferably, the sound processing apparatus is specifically configured to: obtaining sound insulation performance data of the target area of the vehicle to be tested based on the difference value between the first sound data and the second sound data; or obtaining sound insulation performance data of the target area of the vehicle to be tested based on the ratio of the first sound data to the second sound data.
Preferably, the sound insulation and absorption material includes: EVA plastic, lead plate, steel plate, sound absorbing cotton and rubber.
In a third aspect, the present invention provides an electronic device according to an embodiment of the present invention, the electronic device including a memory, a processor, and code stored on the memory and executable on the processor, wherein the processor implements any of the embodiments of the first aspect when executing the code.
In a fourth aspect, the present invention provides, by way of example, a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the embodiments of the first aspect.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
according to the invention, the vehicle to be tested is placed in the preset reverberation room, and the sound source is arranged in the reverberation room, so that the reverberation room can provide sound required by testing; then covering the sound-shielding material in a sound-shielding region other than the target region to expose the target region in the sound source; collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area; and finally, obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data. According to the invention, the sound insulation and absorption materials are only required to be covered in the sound shielding area, and the parts to be tested are not required to be removed from the automobile body, so that the situation of damaging the automobile body is avoided, the sound insulation and absorption materials are not required to be customized, the sound insulation performance test can be performed only by exposing the target area, the test period is shortened, a plurality of tools are not required to be manufactured, and the cost in the test process is also reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for testing sound insulation performance of a vehicle in an embodiment of the invention;
FIG. 2 is a schematic diagram of a shielding tool structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a shielding tool in one implementation of an embodiment of the present invention;
FIG. 4 is a schematic view of a shielding tool in another embodiment of the present invention;
FIG. 5 is a schematic view of a structure of a vehicle sound insulation performance test device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a vehicle sound insulation performance test apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a computer-readable storage medium structure in accordance with an embodiment of the invention.
Detailed Description
The embodiment of the invention solves the technical problems of long period and high cost of measuring the sound insulation performance of the vehicle in the related technology by providing the method and the device for testing the sound insulation performance of the vehicle and the electronic equipment.
The technical scheme provided by the embodiment of the invention aims to solve the technical problems, and the overall thought is as follows:
firstly, placing a vehicle to be tested in a preset reverberation room, wherein the reverberation room can provide sound required by test because the sound source is arranged in the reverberation room; then covering the sound-shielding material in a sound-shielding region other than the target region to expose the target region in the sound source; collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area; and finally, obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data. According to the invention, the sound insulation and absorption materials are only required to be covered in the sound shielding area, and the parts to be tested are not required to be removed from the automobile body, so that the situation of damaging the automobile body is avoided, the sound insulation and absorption materials are not required to be customized, the sound insulation performance test can be performed only by exposing the target area, the test period is shortened, a plurality of tools are not required to be manufactured, and the cost in the test process is also reduced.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
First, the term "and/or" appearing herein is merely an association relationship describing associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be capable of operation in sequences other than those illustrated or otherwise described.
In a first aspect, according to an embodiment of the present invention, a method for testing sound insulation performance of a vehicle is provided, as shown in fig. 1, the method for testing sound insulation performance of a vehicle includes the following steps:
step S101: and placing the vehicle to be tested in a reverberation room, wherein a sound source is arranged in the reverberation room.
Specifically, the vehicle to be tested can be placed in the reverberation room, and a sound source is placed in the reverberation room, so that the sound required for testing the sound insulation performance of the vehicle can be provided in the reverberation room.
In the implementation process, the sound source can be a spherical sound source or other objects capable of emitting sound.
Step S102: the sound shielding region other than the target region is covered with a sound insulating and absorbing material to expose the target region in the sound source.
Specifically, according to the requirement of the sound insulation performance test, a target area can be determined from the vehicle to be tested, and the target area is used as the object of the sound insulation performance test.
In the specific implementation process, if the sound insulation performance of the vehicle window is required to be tested, the front side window glass, the rear side window glass, the front windshield glass, the rear windshield glass or the skylight glass of the vehicle can be determined as a target area, and the determined window glass is taken as a test object; if the sound insulation performance of the vehicle door needs to be tested, the front door, the rear door or the trunk door of the vehicle can be determined as a target area, and the determined door is used as a test object.
Of course, the sound insulation performance test may be performed on the a-pillar, the B-pillar, or the C-pillar of the vehicle, and the sound insulation performance test may be performed on the engine compartment of the vehicle, that is, the target area may further include the a-pillar, the B-pillar, the C-pillar, the engine compartment, and the like of the vehicle.
For how to determine the sound shielding area except the target area, specifically, the outline of the target area can be detected to obtain first outline data; detecting the outline of the vehicle to be detected to obtain second outline data; and then determining the sound shielding area according to the first contour data and the second contour data.
In a specific implementation, after determining the target area, a dimension measuring tool may be used to measure a contour of the target area to obtain first contour data, where the first contour data includes first geometric data and position data of the target area. Wherein the first geometric data at least characterize the area and shape of the target area and the position data at least characterize the position of the target area on the vehicle to be tested.
In a specific implementation process, the outline of the vehicle to be tested can be measured by using a size measuring tool to obtain second outline data, wherein the second outline data comprises second geometric data of the vehicle to be tested, and the second geometric data at least represents the whole vehicle area and the whole vehicle shape of the vehicle to be tested.
In a specific implementation process, the sound shielding area can be determined based on a difference value between the first geometric data and the second geometric data, and the target area is eliminated on the whole vehicle of the vehicle to be tested according to the position data, so that the area and the shape of the area except the target area are determined, and the sound shielding area is determined.
After the sound-shielding region is determined, the sound-shielding region is covered with a sound-insulating material. Specifically, other heavy layer materials such as EVA (Ethylene Vinyl Acetate Copolymer, ethylene-vinyl acetate copolymer), lead plates, steel plates and the like with high surface density can be cut into shapes matched with the surface of a vehicle to be tested and stuck on the surface of the vehicle body.
And, can add the sound absorption cotton between heavy layer material and automobile body surface to pack the gap of not laminating between heavy layer material and the automobile body, thereby effectual reduction is by the sound of gap transmission to the car in, strengthens the sound shielding effect. The target area is not laid with any sound-insulating material, so that it can be considered that sound in the vehicle is transmitted into the vehicle through the target area.
Aiming at the chassis of the vehicle to be tested, in the specific implementation process, the sound insulation and absorption materials can be pressed on the chassis by using the lifting device, and gaps of the sound insulation and absorption materials are sealed by rubber, wherein the lifting device can be a screw jack or a jack and the like, and the rubber can be butyl rubber.
For the roof of the vehicle to be tested, because the lengths and widths of different vehicle types may be different, in order to be compatible with the different vehicle types as much as possible and to facilitate laying of the sound insulation and absorption materials on the vehicle to be tested, the sound insulation and absorption materials may be clamped by using a shielding tool as shown in fig. 2. Wherein the first shielding plate 100 is connected with the second shielding plate 200 through a connection mechanism 400; the standard shielding plate 300 is located between the first shielding plate 100 and the second shielding plate 200, and is flexibly connected to the first shielding plate 100 through a first sealing plate 301 and is flexibly connected to the second shielding plate 200 through a second sealing plate 302.
Specifically, the distance between the first shielding plate 100 and the second shielding plate 200 may be adjusted according to the vehicle width of the vehicle to be tested. Referring to fig. 3 to 4, in the implementation process, the connection mechanism 400 may include: a connecting rod 401, a stud 402, a nut 403 and a washer 404. When the vehicle body width to be measured is small, the distance between the first shielding plate 100 and the second shielding plate 200 can be shortened and fixed by the connecting mechanism 400, and at this time, the standard shielding plate 300 is overlapped on the first shielding plate 100 and the second shielding plate 200; when the vehicle body width to be measured is large, the distance between the first shielding plate 100 and the second shielding plate 200 may be enlarged and fixed by the connection mechanism 400, and at this time, the standard shielding plate 300 is laid flat between the first shielding plate 100 and the second shielding plate 200.
In a specific implementation process, a plurality of openings may be disposed on the connecting rod, and corresponding openings may be disposed on the first shielding plate 100 and the second shielding plate 200 for penetrating the stud 402, so as to achieve a fixing effect. In actually adjusting the distance between the first shielding plate 100 and the second shielding plate 200, this may be achieved by changing the position of the openings of the studs 402 on the first shielding plate 100 and/or the second shielding plate 200.
It should be noted that the number and the distance between the openings can be set according to the common width of the vehicle to be tested, and when the openings are not used, the openings are blocked by sealing materials such as a sealing damping plate or plasticine, so as to prevent sound from entering the vehicle through the openings.
It can be understood that, besides the shielding tool can be set according to the vehicle width of the vehicle to be tested, the shielding tool can also be set according to the vehicle length of the vehicle to be tested, i.e. the shielding tool can be set along the vehicle length direction of the vehicle to be tested, and the specific implementation mode of the shielding tool can refer to the vehicle width direction of the vehicle to be tested, so that the description is omitted herein for brevity.
In addition, the shielding tools of the side surface and the front windshield and the rear windshield of the vehicle to be tested can be connected with the shielding tools aiming at the roof through hinges, hinges or bearings and the like, and the shielding tools are used for clamping sound insulation and absorption materials to shield sounds of the whole vehicle to be tested except for a target area.
In order to further improve the shielding effect of the sound of the vehicle to be tested, particularly, a sound insulation and absorption material can be added on the central control instrument board and the front row pedal area; sound-insulating and absorbing materials can be paved at positions of seats, instrument panels, ornamental plates, other glass and the like, which are strong in sound reflection, so that sound is shielded. And the positions of the shielding tool, which are in contact with the windshield glass, the carpet and the left and right vehicle bodies, need to be sealed by damping glue and adhesive tapes so as to avoid incomplete sound shielding.
Step S103: first sound data on one side of the target area is collected, and second sound data on the other side of the target area is collected.
Specifically, the outside sound data of one side of the target area is collected, and the inside sound data of the other side of the target area is collected.
In a specific implementation process, a plurality of microphones can be arranged near a target area of a vehicle to be tested, wherein at least one microphone is arranged in the vehicle to be tested so as to acquire sound data of the target area in the vehicle; at least one microphone is arranged outside the vehicle to be tested so as to acquire sound data of the target area outside the vehicle.
Based on the above, the sound source in the reverberation room is activated as an excitation source, and corresponding sound data are collected through microphones arranged outside and inside the vehicle to be tested, so that the sound insulation performance of the vehicle to be tested is tested.
Because the other areas except the target area are covered with the sound insulation and absorption materials, the sound can not enter the vehicle to be tested through the areas, and therefore, the sound in the vehicle can be considered to be transmitted through the target area, and the sound collected by the microphone in the vehicle can be considered to be transmitted directly from the target area without the sound reflected by the inner surface of the vehicle, so that the vehicle body is not required to be damaged, the testing period is shortened, a plurality of different shielding tools are not required to be manufactured, and the cost in the testing process is also reduced.
Step S104: and obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data.
Specifically, the sound insulation performance data of the target area of the vehicle to be tested can be obtained based on the difference value between the first sound data and the second sound data, or the sound insulation performance data of the target area of the vehicle to be tested can be obtained based on the ratio of the first sound data to the second sound data.
In the specific implementation process, the sound data outside the vehicle are acquired through the microphones outside the vehicle to be detected, and the sound data inside the vehicle are acquired through the microphones inside the vehicle to be detected, wherein the sound data at least comprise sound intensity and sound pressure level.
For example, the sound insulation performance data of the target area of the vehicle to be tested can be obtained by the following formula (1):
STL＝10lg(W i -W t ) (1)
in the formula (1), STL represents sound insulation performance data (Sound Transmission Loss), W i Representing the sound intensity, W, in the vehicle to be measured t And the sound intensity outside the vehicle to be tested is represented.
For example, the sound insulation performance data of the target area of the vehicle to be tested can also be obtained by the following formula (2):
NR＝SPL outer part -SPL Inner part (2)
In the formula (2), NR represents a Noise reduction (SPL) amount Outer part Represents the sound pressure level (Sound Pressure Level), SPL of the vehicle outside the vehicle to be measured Inner part Representing the sound pressure level in the vehicle under test.
After the sound insulation performance data of the target area of the vehicle to be tested is obtained, the sound insulation performance data can be used for optimizing the vehicle to be tested so as to improve the NVH (Noise, vibration, harshness, noise, vibration and harshness) quality.
In addition, after the current target area is subjected to the sound insulation performance test, the next target area can be determined again, and a new sound insulation performance test is performed, and as the shielding tool is flexible to assemble and disassemble, the next target area can be exposed only by taking down the corresponding shielding tool, and further the sound insulation performance of the rest areas of the vehicle to be tested is tested, parts are not required to be disassembled from the vehicle to be tested, and a new clamping tool is not required to be prepared, so that the efficiency in the sound insulation performance test process is improved.
In a second aspect, based on the same inventive concept, an embodiment of the present invention provides a vehicle sound insulation performance test device.
Referring to fig. 5, the vehicle sound insulation performance test device includes:
a reverberation chamber 501 in which a sound source 502 for providing a sound required for the test is provided;
a sound shielding tool 503, configured to cover a sound insulation and absorption material in a sound shielding area except for a target area after determining the target area on the vehicle to be tested, so as to expose the target area in the sound source 502;
a first microphone 504 disposed at one side of the target area for collecting first sound data;
a second microphone 505 disposed at the other side of the target area for collecting second sound data;
the sound processing device 506 is configured to obtain sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data.
As an alternative embodiment, the vehicle sound insulation performance test device further includes:
a sound masking region determining device (not shown) for detecting a contour of the target region to obtain first contour data; detecting the outline of the vehicle to be detected to obtain second outline data; and determining the sound shielding area according to the first contour data and the second contour data.
As an alternative embodiment, the first contour data comprises first geometric data and position data of the target region; the second profile data includes second geometric data of the vehicle under test.
As an alternative embodiment, the sound-shielding area determining device is specifically configured to:
a sound masking region is determined based on the difference between the first geometric data and the second geometric data, and the position data.
As an alternative embodiment, the sound processing device 506 is specifically configured to:
obtaining sound insulation performance data of a target area of the vehicle to be tested based on the difference value between the first sound data and the second sound data; or obtaining the sound data loss rate of the target area of the vehicle to be tested based on the ratio of the first sound data to the second sound data.
As an alternative embodiment, the first microphone 504 is specifically configured to:
and collecting the sound data outside the vehicle at one side of the target area.
As an alternative embodiment, the second microphone 505 is specifically used for:
and collecting the sound data in the vehicle at the other side of the target area.
As an alternative embodiment, a sound insulating and absorbing material comprises:
EVA plastic, lead plate, steel plate, sound absorbing cotton and rubber.
Since the method for testing the sound insulation performance of the vehicle described in this embodiment is a method for implementing the device for testing the sound insulation performance of the vehicle described in this embodiment, based on the method for testing the sound insulation performance of the vehicle described in this embodiment, those skilled in the art can understand the specific implementation of the method of this embodiment and various modifications thereof, so how this method is implemented in this embodiment will not be described in detail herein. As long as the person skilled in the art implements the method for testing the sound insulation performance of the vehicle according to the embodiment of the invention, the method falls within the scope of protection intended by the present invention.
In a third aspect, based on the same inventive concept, an embodiment of the present invention provides a vehicle sound insulation performance test apparatus.
Referring to fig. 6, a vehicle sound insulation performance test apparatus provided by an embodiment of the present invention includes: the system comprises a memory 601, a processor 602 and code stored on the memory and executable on the processor 602, wherein the processor 602 implements any one of the embodiments of the vehicle sound insulation performance test methods described above when the code is executed.
Where in FIG. 6 a bus architecture (represented by bus 600), bus 600 may comprise any number of interconnected buses and bridges, with bus 600 linking together various circuits, including one or more processors, represented by processor 602, and memory, represented by memory 601. Bus 600 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. The bus interface 605 provides an interface between the bus 600 and the receiver 603 and the transmitter 604. The receiver 603 and the transmitter 604 may be the same element, i.e. a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 602 is responsible for managing the bus 600 and general processing, while the memory 601 may be used to store data used by the processor 602 in performing operations.
In a fourth aspect, based on the same inventive concept, as shown in fig. 7, the present embodiment provides a computer-readable storage medium 700, on which a computer program 701 is stored, the program 701 implementing any implementation of the foregoing vehicle sound insulation performance test method in the first aspect when executed by a processor.
The technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages:
according to the vehicle sound insulation performance test method disclosed by the invention, the vehicle to be tested is placed in the preset reverberation chamber, and the sound source is arranged in the reverberation chamber, so that the reverberation chamber can provide sound required by the test; then covering the sound-shielding material in a sound-shielding region other than the target region to expose the target region in the sound source; collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area; and finally, obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data. According to the invention, the sound insulation and absorption materials are only required to be covered in the sound shielding area, and the parts to be tested are not required to be removed from the automobile body, so that the situation of damaging the automobile body is avoided, the sound insulation and absorption materials are not required to be customized, the sound insulation performance test can be performed only by exposing the target area, the test period is shortened, a plurality of tools are not required to be manufactured, and the cost in the test process is also reduced.
It will be appreciated by those skilled in the art that embodiments of the invention may be provided as a method, system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer instructions. These computer instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A method for testing sound insulation performance of a vehicle, the method comprising:
placing a vehicle to be tested in a reverberation room, wherein a sound source is arranged in the reverberation room;
covering a sound shielding material in a sound shielding region other than a target region to expose the target region in the sound source;
collecting first sound data on one side of the target area and collecting second sound data on the other side of the target area;
obtaining sound insulation performance data of the target area of the vehicle to be tested based on the first sound data and the second sound data;
wherein before the sound shielding region other than the target region is covered with the sound insulating and absorbing material, the method comprises:
detecting the outline of the target area to obtain first outline data;
detecting the outline of the vehicle to be detected to obtain second outline data;
determining the sound shielding area according to the first contour data and the second contour data;
the interior of the vehicle to be tested is covered with the sound insulation and absorption material.
2. The method of claim 1, wherein,
the first contour data includes first geometric data and position data of the target area;
the second contour data comprise second geometric data of the vehicle to be tested;
the determining the sound shielding area according to the first contour data and the second contour data includes:
the sound masking region is determined based on the difference between the first geometric data and the second geometric data, and the position data.
3. The method according to claim 1, wherein the obtaining sound insulation performance data of the target area of the vehicle to be measured based on the first sound data and the second sound data includes:
obtaining sound insulation performance data of the target area of the vehicle to be tested based on the difference value between the first sound data and the second sound data; or (b)
And obtaining sound insulation performance data of the target area of the vehicle to be tested based on the ratio of the first sound data to the second sound data.
4. The method of claim 1, wherein the capturing first sound data on one side of the target area and capturing second sound data on the other side of the target area comprises:
and acquiring the sound data outside the vehicle at one side of the target area and acquiring the sound data inside the vehicle at the other side of the target area.
5. A vehicle sound insulation performance test device, the device comprising:
a reverberation chamber in which a sound source for providing sound required for the test is provided;
a sound shielding tool for covering a sound insulation and absorption material in a sound shielding area except a target area so as to expose the target area in the sound source;
the first microphone is arranged on one side of the target area and used for collecting first sound data;
the second microphone is arranged on the other side of the target area and is used for collecting second sound data;
the sound processing equipment is used for obtaining sound insulation performance data of a target area of the vehicle to be tested based on the first sound data and the second sound data;
wherein the sound shielding area is determined by first contour data obtained by detecting the contour of the target area and second contour data obtained by detecting the contour of the vehicle to be detected;
the interior of the vehicle to be tested is covered with the sound insulation and absorption material.
6. The apparatus of claim 5, wherein the sound processing device is specifically configured to:
obtaining sound insulation performance data of the target area of the vehicle to be tested based on the difference value between the first sound data and the second sound data; or (b)
And obtaining the sound data loss rate of the target area of the vehicle to be tested based on the ratio of the first sound data to the second sound data.
7. The apparatus of claim 5, wherein the sound insulating and absorbing material comprises:
EVA plastic, lead plate, steel plate, sound absorbing cotton and rubber.
8. An electronic device comprising a memory, a processor, and code stored on the memory and executable on the processor, wherein the processor, when executing the code, implements the method of any of claims 1-4.
9. A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the method of any of claims 1-4.
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| CN114720150B (en) * | 2022-03-30 | 2023-09-12 | 襄阳达安汽车检测中心有限公司 | Test method and test system for sound insulation performance of whole vehicle |
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