Indoor tire road noise testing device

Abstract

The utility model discloses an indoor tire road noise testing device, which comprises a sound insulation box body, a slope table, a tire driving system and a noise acquisition system, the sound insulation box body is of a closed structure. The slope table is arranged in the sound insulation box body, the slope table is provided with a slope adjusting device, the slope adjusting device is used for adjusting the slope angle of the slope table, and the slope of the slope table is used for placing a pavement test piece; the tire driving system comprises a driving assembly and a tire fixer, the tire fixer is rotatably mounted at the output end of the driving assembly, the tire fixer is arranged in the sound insulation box body and is used for mounting a test tire, and the driving assembly is used for driving the tire fixer to move to drive the test tire to impact the pavement test piece; the noise acquisition system is used for acquiring sound data in the sound insulation box body. The slope table is used for simulating the actual road surface condition, the noise condition of the designed road surface can be tested in the design stage, the actual effect is effectively guaranteed, and the problem that low-noise road surface design is difficult to verify in the design stage is solved.

Description

Technical Field

[0001] This utility model relates to the field of indoor noise detection technology, and in particular to an indoor tire road surface noise testing device. Background Technology

[0002] With the increasing mileage of roads in my country, road noise has gradually become a major source of urban noise pollution, significantly impacting people's quality of life. Therefore, noise reduction technologies have become a key research focus. Road noise primarily originates from vehicle body vibration and the coupling effect between tires and the road surface. Current advanced automobile manufacturing techniques have already reduced vehicle body noise to relatively low levels. Further improvements to vehicle body conditions require substantial research effort and funding, with limited success. Therefore, research has focused on tires and road surfaces, with numerous projects investigating the complex mechanisms of tire / road surface noise. In the field of road-related research, experts are attempting to reduce road noise by designing noise-reducing road surfaces based on noise mechanisms.

[0003] However, due to the current lack of effective indoor tire road noise testing equipment, the actual effectiveness of designed noise-reducing pavements is difficult to verify during the design phase. Most tests can only be conducted on-site after actual construction, which is costly and inefficient. Therefore, how to evaluate tire road noise during the design phase has become an urgent problem to be solved.

[0004] Currently, many studies both domestically and internationally use tire-road simulation models to analyze tire-road noise. However, existing models are often overly optimized, and their reliability needs to be verified experimentally; moreover, they struggle to accurately simulate real-world conditions. To improve the efficiency of noise-reducing road surface design and obtain more controllable design solutions, researching an indoor tire-road noise testing device and method is imperative. The most common indoor tire-road noise testing method is the indoor drum method: the drum equipment is placed in an anechoic chamber or semi-anechoic chamber, and the test tire is placed close to the drum. A motor drives the drum to rotate, causing the test tire to rotate at a certain speed. The main disadvantages of the drum method are the need for expensive drum equipment and the difficulty in simulating different road surface conditions within an anechoic or semi-anechoic chamber. Therefore, this method is primarily used for research related to low-noise road surfaces. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose an indoor tire road surface noise testing device to solve the problem that low-noise road surface designs are difficult to verify during the design phase.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An indoor tire road noise testing device includes a soundproof enclosure, a slope platform, a tire drive system, and a noise acquisition system.

[0008] The soundproof enclosure is a closed structure;

[0009] The ramp is installed inside the soundproof box. The ramp is equipped with a ramp adjustment device, which is used to adjust the ramp angle. The ramp surface is used to place road test specimens.

[0010] The tire drive system includes a drive assembly and a tire retainer. The tire retainer is rotatably mounted on the output end of the drive assembly. The tire retainer is disposed in the soundproof enclosure. The tire retainer is used to mount a test tire. The drive assembly is used to drive the tire retainer to move and cause the test tire to impact a road test specimen.

[0011] The noise acquisition system is used to collect sound data inside the soundproof enclosure.

[0012] Specifically, it also includes a controller that connects the tire drive system and the noise acquisition system.

[0013] Specifically, it also includes at least one displacement sensor, which is disposed inside the soundproof enclosure.

[0014] Specifically, the slope adjustment device includes a base plate, a panel, and a support assembly. The base plate is fixed to the inner wall of the soundproof enclosure. The base plate and the panel are connected to form an angle α. The support assembly is used to adjust the angle α formed by the base plate and the panel. The support assembly is provided with an adjustment component, which is used to adjust the support assembly.

[0015] Specifically, the drive assembly includes a cylinder, a fixing rod, and an air pump. The cylinder is mounted on the soundproof enclosure. One end of the fixing rod is connected to the cylinder, and the other end of the fixing rod is connected to the tire retainer. The air pump is connected to the cylinder and is used to provide pneumatic pressure to the cylinder. The cylinder is used to drive the fixing rod to move, and the fixing rod drives the tire retainer and the test tire to move.

[0016] Specifically, the slope platform is also equipped with a limiting device for fixing the road test piece.

[0017] Preferably, the soundproof enclosure is made of iron material, and the outer wall of the soundproof enclosure is provided with several handles. The soundproof enclosure is an enclosure with an openable and closable door. The noise acquisition system includes several microphones and at least one noise meter. The microphones are disposed inside the soundproof enclosure and have magnets. The noise meter is connected to the microphones.

[0018] Specifically, the soundproof enclosure is provided with sound-insulating cotton, which is attached to the inner wall of the soundproof enclosure.

[0019] The technical solution provided by this utility model can include the following beneficial effects:

[0020] 1. By using a slope platform to simulate actual road conditions and tire rolling states, the noise level of the designed road surface can be tested during the design phase, effectively ensuring its practical performance and solving the current problem that low-noise road surface designs are difficult to verify during the design phase.

[0021] 2. By combining a noise acquisition system and a displacement sensor, the test band when the test tire impacts the road test specimen can be effectively identified, and the rebound of the test tire after impact can be obtained. This information can then be used to analyze the factors affecting road noise in subsequent test tire testing, thereby improving testing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an indoor tire road noise testing device according to the present invention.

[0023] Figure 2 This is a schematic diagram of the slope platform of this utility model.

[0024] The components include: soundproof enclosure 1, slope platform 2, base plate 21, panel 22, support assembly 23, adjustment knob 24, tire drive system 3, cylinder 31, fixing rod 32, air pump 33, noise acquisition system 4, microphone 41, noise meter 42, road test piece 5, controller 6, displacement sensor 7, limit device 8, and included angle α. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is combined with Figure 1 and Figure 2 This invention describes an indoor tire road surface noise testing device according to an embodiment of the present invention.

[0030] An indoor tire road noise testing device includes a soundproof enclosure 1, a slope platform 2, a tire drive system 3, and a noise acquisition system 4.

[0031] The soundproof enclosure 1 is a closed structure;

[0032] The slope platform 2 is installed inside the soundproof box 1. The slope platform 2 is equipped with a slope adjustment device, which is used to adjust the slope angle of the slope platform 2. The slope of the slope platform 2 is used to place the road test piece 5.

[0033] The tire drive system 3 includes a drive assembly and a tire retainer. The tire retainer is rotatably mounted on the output end of the drive assembly. The tire retainer is disposed inside the soundproof enclosure 1. The tire retainer is used to install a test tire. The drive assembly is used to drive the tire retainer to move and cause the test tire to impact the road test specimen 5.

[0034] The noise acquisition system 4 is used to collect sound data inside the soundproof enclosure 1.

[0035] Traditional methods of vertical tire impact testing can only simulate a vehicle stationary on the road surface and cannot characterize the rolling state of the tire. This new structure, using a slope platform to simulate actual road conditions, allows for testing the noise levels of the designed road surface during the design phase, effectively ensuring its practical performance and solving the problem of verifying low-noise road surface designs during the design stage.

[0036] In one embodiment, according to the relevant requirements in the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" T0703, a shaped asphalt mixture pavement test specimen 5 is fabricated. Inside the soundproof enclosure 1, a test tire is mounted on a tire holder, and the pavement test specimen 5 is mounted on a slope platform. The tire drive system 3 drives the test tire to impact the pavement test specimen 5 on the slope platform. The slope platform 2 is used to simulate road conditions, and the slope angle of the slope platform 2 is adjusted to change the contact mark between the test tire and the pavement test specimen 5. This effectively simulates the state of the marks left by the test tire rolling and rubbing at different slope angles with different forces. At the same time, a noise acquisition system 4 is used to collect the sound data of the noise generated by the test tire impacting the pavement test specimen 5 inside the soundproof enclosure 1. This is used to verify whether the low-noise pavement design meets the standards and solve the problem that the low-noise pavement design is difficult to verify at the design stage at present.

[0037] Specifically, it also includes a controller 6, which is connected to the tire drive system 3 and the noise acquisition system 4.

[0038] The controller 6 facilitates unified adjustment and control of the device operation, and is used to display and record the collected data.

[0039] Specifically, it also includes at least one displacement sensor 7, which is disposed inside the soundproof enclosure 1.

[0040] In one embodiment, the displacement sensor 7 is a laser displacement sensor, installed at the end of the tire retainer, emitting a laser beam towards the inner wall of the soundproof enclosure 1 in the direction of impact to collect displacement data. By combining the noise acquisition system 4 and the displacement sensor 7, the test band when the test tire impacts the road test specimen 5 can be effectively identified, improving testing efficiency. The displacement sensor 7 is connected to the controller 6 to record displacement data and obtain information on the rebound of the test tire after impacting the road test specimen 5, which is used for subsequent analysis of the factors affecting road noise in the test tire.

[0041] Specifically, the slope adjustment device includes a base plate 21, a panel 22, and a support assembly 23. The base plate 21 is fixed to the inner wall of the soundproof enclosure 1. The base plate 21 and the panel 22 are connected to form an angle α. The support assembly 23 is used to adjust the angle α formed by the base plate 21 and the panel 22. The support assembly 23 is provided with an adjustment assembly 24, which is used to adjust the support assembly 23.

[0042] like Figure 2 In one embodiment, the base plate 21 and the panel 22 are rectangular plate structures. One side of the panel 22 is fixed to the base plate 21. The base plate 21 and the panel 22 are connected to form an included angle α. The support assembly 23 includes a cylindrical support rod and a hollow cylindrical support sleeve rod. The support rod has multiple through holes along the radial direction. The support sleeve rod has a pair of through holes along the radial direction. The through holes of the support sleeve rod have internal threads. The adjustment assembly 24 is an adjustment knob with a round rod. The round rod of the adjustment knob has external threads that match the internal threads of the through holes of the support sleeve rod. The adjustment knob is screwed into and passes through the through holes of the support sleeve rod and one of the through holes of the support rod to fix the support sleeve rod and the support rod. The upper and lower ends of the support component 23 are respectively connected to the far end of the included angle α formed by the base plate 21 and the panel 22. The base plate 21, the panel 22 and the support rod are connected to form a triangular support structure. By selecting different through holes of the support rod, the overall length of the support component 23 can be changed. The overall length of the support component 23 formed by the multiple preset through hole positions of the support rod forms a structure with the included angle α between the base plate 21 and the panel 22 ranging from 5° to 45°, with 9 levels in 5° increments, to achieve the effect of setting different slopes.

[0043] Specifically, the drive assembly includes a cylinder 31, a fixing rod 32, and an air pump 33. The cylinder 31 is mounted on the soundproof enclosure 1. One end of the fixing rod 32 is connected to the cylinder 31, and the other end of the fixing rod 32 is connected to the tire retainer. The air pump 33 is connected to the cylinder 31 and is used to provide pneumatic pressure to the cylinder 31. The cylinder 31 is used to drive the fixing rod 32 to move, and the fixing rod 32 drives the tire retainer and the test tire to move.

[0044] like Figure 1 In one embodiment, cylinder 31 is an impact cylinder. The cylinder body of cylinder 31 is fixed to the upper outer wall of the soundproof enclosure 1. Two fixing rods 32 are symmetrically arranged on both sides of cylinder 31 and tire holder. One end of fixing rod 32 is fixedly connected to the piston rod output end of cylinder 31, and the other end of fixing rod 32 extends downward through the opening of soundproof enclosure 1 and into the soundproof enclosure 1 to connect to tire holder. Test tire is installed on tire holder. Test tire and tire holder are rotatably fixed to the bottom end of fixing rod 32. Road test piece 5 is installed on the ramp 2 fixed at the bottom of soundproof enclosure 1. Air pump 33 generates air pressure to provide power to cylinder 31. The piston rod output end of cylinder 31 drives fixing rod 32 to move downward quickly. Fixing rod 32 drives tire holder and test tire to impact road test piece 5 on ramp 2 to achieve the effect of test tire impacting road test piece 5. By adjusting air pump 33 to change air pressure and air supply speed, the impact speed and force of tire drive system 3 can be controlled.

[0045] Specifically, the slope platform 2 is also provided with a limiting device 8 for fixing the road test piece 5.

[0046] In one embodiment, the limiting device 8 is a limiting iron block placed on the base plate of the ramp 2. The limiting iron block is used to support the road test piece 5 so that it does not slip off the slope of the ramp 2.

[0047] Preferably, the soundproof enclosure 1 is made of iron material, and the outer wall of the soundproof enclosure 1 is provided with several handles. The soundproof enclosure 1 is an enclosure with an openable and closable door. The noise acquisition system 4 includes several microphones 41 and at least one noise meter 42. The microphones 41 are disposed inside the soundproof enclosure 1 and have magnets. The noise meter 42 is connected to the microphones 41.

[0048] In one embodiment, the soundproof enclosure 1 is made of iron, and handles are provided on all four outer walls of the enclosure, allowing it to be opened. The noise acquisition system 4 includes four microphones 41 and one noise meter 42. The microphones 41 are equipped with magnets and are attached to the inner wall of the iron soundproof enclosure 1, facilitating their repositioning as needed for testing. One microphone 41 is connected to the noise meter 42, which is located on the outer wall of the soundproof enclosure 1, allowing for direct reading of the noise sound pressure level in the time domain. The other three microphones 41 are connected to the controller 6, storing and recording the noise data for subsequent frequency domain analysis. By simultaneously using multiple movable, magnetically attached microphones 41, noise levels at different locations can be collected in a single test, improving testing efficiency.

[0049] Specifically, the soundproof enclosure 1 is provided with soundproofing cotton, which is attached to the inner wall of the soundproof enclosure 1.

[0050] With this structure, the inner wall of the soundproof enclosure 1 is lined with sound-insulating cotton, which can effectively prevent external sounds from affecting the test results inside the enclosure, and also isolate the noise generated inside from the noise pollution of outside personnel, thus overcoming the influence of environmental noise and improving the accuracy of noise testing.

[0051] Test method:

[0052] Step 1: Determine the standard slope based on different expected speeds.

[0053] Outdoors, a car equipped with the same tires as this device is driven over the imprint paper at a certain expected speed, and the tire imprint at the corresponding speed is obtained, which is recorded as imprint A.

[0054] Open the soundproof box 1, place the imprint paper on the panel 22 of the ramp 2, rotate the knob to adjust the included angle α from 5° to 45°, in 5° increments, for a total of 9 increments, and set the pressure of the tire drive system 3 to one-quarter of the vehicle's weight.

[0055] Turn on the power to the air pump 33 and the controller 6. Under different slopes, the controller 6 controls the tire drive system 3 to drive the test tire to hit the imprint paper on the slope platform 2, and obtain the tire imprints in 9 states, which are recorded as the B group imprints.

[0056] Compare the tire tracks in group B with those in group A. Select the tire track in group B that is most similar to track A and denote it as track C. The included angle α is denoteed as the standard slope at the expected speed.

[0057] Step 2: According to the relevant requirements in the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" T0703, prepare 5 asphalt mixture slab-shaped road test specimens for testing;

[0058] Step 3: Open the soundproof box 1, place the road test piece 5 on the slope platform 2, and lock it in place by the limiting device 8 to prevent it from sliding down.

[0059] Step 4: Adjust the standard slope at the expected speed required by the included angle α, turn on the power to the air pump 33 and controller 6, and control the tire drive system 3 through controller 6 to drive the test tire to impact the road test specimen 5. The noise acquisition system 4 and displacement sensor 7 collect data, record the noise data and displacement data generated during the impact of the test tire on the road test specimen 5, and save them in controller 6.

[0060] Other components and operations of the indoor tire road noise testing device according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0061] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor tire road noise testing device, characterized in that: This includes a soundproof enclosure, ramp, tire drive system, and noise acquisition system; The soundproof enclosure is a closed structure; The ramp is installed inside the soundproof box. The ramp is equipped with a ramp adjustment device, which is used to adjust the ramp angle. The ramp surface is used to place road test specimens. The tire drive system includes a drive assembly and a tire retainer. The tire retainer is rotatably mounted on the output end of the drive assembly. The tire retainer is disposed in the soundproof enclosure. The tire retainer is used to mount a test tire. The drive assembly is used to drive the tire retainer to move and cause the test tire to impact a road test specimen. The noise acquisition system is used to collect sound data inside the soundproof enclosure.

2. The indoor tire road noise testing device according to claim 1, characterized in that: It also includes a controller that connects the tire drive system and the noise acquisition system.

3. An indoor tire road noise testing device according to claim 1 or 2, characterized in that: It also includes at least one displacement sensor, which is disposed inside the soundproof enclosure.

4. The indoor tire road noise testing device according to claim 1, characterized in that: The slope adjustment device includes a base plate, a panel, and a support assembly. The base plate is fixed to the inner wall of the soundproof enclosure. The base plate and the panel are connected to form an angle α. The support assembly is used to adjust the angle α formed by the base plate and the panel. The support assembly is provided with an adjustment component, which is used to adjust the support assembly.

5. The indoor tire road noise testing device according to claim 1, characterized in that: The drive assembly includes a cylinder, a fixing rod, and an air pump. The cylinder is mounted on the soundproof enclosure. One end of the fixing rod is connected to the cylinder, and the other end of the fixing rod is connected to the tire retainer. The air pump is connected to the cylinder and is used to provide pneumatic pressure to the cylinder. The cylinder is used to drive the fixing rod to move, and the fixing rod drives the tire retainer and the test tire to move.

6. The indoor tire road noise testing device according to claim 1, characterized in that: The slope platform is also equipped with a limiting device for fixing the road test piece.

7. An indoor tire road surface noise testing device according to claim 1 or 2, characterized in that: The soundproof enclosure is made of iron material. The outer wall of the soundproof enclosure is provided with several handles. The soundproof enclosure is an enclosure with an openable door. The noise acquisition system includes several microphones and at least one noise meter. The microphones are set inside the soundproof enclosure. The microphones are equipped with magnets. The noise meter is connected to the microphones.

8. The indoor tire road noise testing device according to claim 1, characterized in that: The soundproof enclosure is equipped with sound-insulating cotton, which is attached to the inner wall of the soundproof enclosure.

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