Vehicle tire noise test system

Abstract

The invention provides a vehicle tire noise testing system, and relates to the technical field of tire testing, the vehicle tire noise testing system comprises a detection base, the upper surface of the detection base is provided with a mounting groove, the mounting groove is internally provided with a road surface simulation assembly, and the upper surface of the detection base is also fixedly connected with a sound insulation cover, a humidity adjusting assembly and a tire mounting assembly; the sound insulation cover is arranged above the left end of the pavement simulation assembly, the humidity adjusting assembly is arranged above the right end of the pavement simulation assembly, the tire mounting assembly is arranged on the rear side of the middle of the pavement simulation assembly, and a sound insulation material is adhered to the inner wall of the sound insulation cover. Through the arrangement of the humidity adjusting assembly, simulation of a wet road surface is achieved, collection of noise data of the tire on the wet road surface is achieved, collection of noise data of the tire on the ground with different humidity is achieved by adjusting the water spraying amount, and the comprehensiveness of tire noise data collection is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire testing, and in particular to a vehicle tire noise testing system. Background Art

[0002] As people's awareness of environmental protection grows, vehicle noise is receiving increasing attention. The main sources of vehicle noise, as we often call it, include engine noise, exhaust noise, fan noise, transmission noise, brake noise, tire noise, and wind noise. Tire noise refers to the friction between the tires and the road surface when the vehicle is traveling at high speeds. The worse the road conditions, the louder the tire noise. Therefore, tire noise is the primary source of noise at high speeds. To address this issue, researchers are developing a vehicle tire noise test device to measure the noise generated by the interaction between different tires, under varying loads and speeds.

[0003] With the rapid development of the automotive industry, consumers are increasingly demanding greater comfort and quietness in their vehicles. As the only part of a car that comes into contact with the ground, the noise level of tires directly affects the ride comfort of the entire vehicle.

[0004] The existing tire noise testing system lacks the collection of noise data under different natural environmental conditions, resulting in insufficient comprehensiveness of tire noise test results. Summary of the Invention

[0005] The present invention provides a vehicle tire noise testing system to solve the defect in the prior art that the noise data under different natural environmental conditions are not collected, resulting in insufficient comprehensiveness of tire noise test results.

[0006] On the one hand, the present invention provides a vehicle tire noise testing system, including a detection base, a mounting groove is provided on the upper surface of the detection base, a road surface simulation component is provided in the mounting groove, and a sound insulation cover, a humidity adjustment component and a tire mounting component are fixedly connected to the upper surface of the detection base, the sound insulation cover is provided above the left end of the road surface simulation component, the humidity adjustment component is provided above the right end of the road surface simulation component, the tire mounting component is provided on the rear side of the middle part of the road surface simulation component, and the inner wall of the sound insulation cover is pasted with sound insulation material.

[0007] Preferably, the road simulation component includes: a drive shaft, a support shaft, a transmission belt and a drive motor. The inner side of the transmission belt is respectively connected to the drive shaft and the support shaft for transmission. The outer surface of the transmission belt is provided with simulation patterns. The support shaft is rotatably connected to the inner wall of the mounting groove. The rear end of the drive shaft is fixedly connected to the transmission shaft. The transmission shaft rotates and passes through the side wall of the mounting groove. The other end of the transmission shaft is fixedly connected to the output end of the drive motor. The drive motor is arranged in a first drive cavity. The first drive cavity is located inside the detection base. Sound insulation material is pasted on the inner wall of the first drive cavity.

[0008] Preferably, the humidity regulating component includes: a protective shell, a water storage chamber is provided inside the protective shell, clean water is stored in the water storage chamber, a water pump is provided inside the water tank, the water outlet of the water storage chamber is connected to a water pipe, the water pipe is connected to a plurality of water outlet pipes, and the water outlet of the water outlet pipe is located above the road surface simulation component.

[0009] Preferably, the tire mounting assembly includes a lifting platform, which is fixedly connected to the upper surface of the detection base. A test box assembly is provided on the front side of the lifting platform. A second driving cavity is provided inside the lifting platform, and a driving assembly is provided in the second driving cavity. The driving assembly is used to drive the test box assembly to move in the up and down directions.

[0010] Preferably, two groups of left-right symmetrical sliding grooves along the up-down direction are provided on the front side of the lifting platform, the test box assembly includes a main box body, an opening is provided at the lower end of the main box body, the front end of the main box body is rotatably connected to the box door, the rear inner wall of the main box body is rotatably connected to the mounting column, the front end of the mounting column is fixedly connected to the mounting platform, and the rear end of the main box body is fixedly connected to two connecting plates, the two connecting plates slide in the two sliding grooves along the up-down direction respectively, and a control board is fixedly connected between the two connecting plates, the control board is connected to the drive assembly, the inner wall of the main box body is pasted with sound insulation material, and the inner wall of the main box body is also provided with a number of sound detectors.

[0011] Preferably, the drive assembly includes a vertically arranged electric telescopic rod, which is fixedly connected to the bottom surface of the second drive cavity, and the telescopic end of the electric telescopic rod is fixedly connected to the lower bottom surface of the control panel. Two positioning rods are symmetrically arranged at the left and right ends of the electric telescopic rod, and the positioning rod slides in the up and down directions through the control panel.

[0012] Preferably, a noise analysis module is further included, and the noise analysis module includes: a data receiving unit, configured to receive a noise signal detected by the sound detector; a data processing unit, configured to process the noise signal and determine the composition of the noise signal; a noise evaluation unit for obtaining an actual evaluation value of tire noise based on the analysis data set; The result output unit is used to output the test results.

[0013] Preferably, the data processing unit includes: Noise filtering subunit, used to filter the noise signal and remove the interference signal; The spectrum analysis subunit is used to perform frequency analysis on the noise signal, obtain the frequency distribution of the noise, and determine the composition of the noise signal. The composition of the noise signal includes the intensity of the tire noise, the number of influencing sound sources, and the noise intensity of the influencing sound sources.

[0014] Preferably, the decision-making unit includes: Reliability evaluation subunit, used to calculate reliability evaluation parameters of test results; ; Wherein, P is the reliability evaluation parameter of the test result; is the theoretical estimated value of tire noise; U is the actual evaluation value of tire noise; The test accuracy of the sound detector; is the unit decibel value; n is the total number of influencing sound sources; is the noise intensity from the i-th influencing sound source detected by the sound detector; It is the preset minimum noise impact intensity; is the rounding symbol; is the influence weighting coefficient of the i-th influencing sound source; m is the total number of influencing factors; is the actual average value of the jth influencing factor during the experiment; is the experimental standard setting value of the jth influencing factor; lg is the logarithmic function with base 10; The decision subunit outputs the actual evaluation value of the tire noise when the reliability evaluation parameter of the test result is greater than a preset first threshold value; otherwise, it outputs that the reliability of the test result is insufficient and guides retesting.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By setting up the humidity adjustment component, the simulation of wet road surfaces is realized, and the noise data of tires on wet road surfaces is collected. By adjusting the amount of water sprayed, the noise data of tires on ground surfaces with different humidity levels is collected, further improving the comprehensiveness of tire noise data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic front cross-sectional view of the present invention; Figure 3 is a schematic right side cross-sectional view of the humidity control assembly of the present invention; Figure 4 is a schematic right side cross-sectional view of the tire mounting assembly of the present invention; Figure 5 It is a schematic front cross-sectional view of the drive assembly of the present invention.

[0018] Reference numerals: 1. Detection base; 2. Mounting slot; 3. Road surface simulation assembly; 4. Soundproof cover; 5. Humidity adjustment assembly; 6. Tire mounting assembly; 7. Drive shaft; 8. Support shaft; 9. Transmission belt; 10. Drive motor; 11. Transmission shaft; 12. First drive chamber; 13. Protective shell; 14. Water storage chamber; 15. Water pipe; 16. Water outlet pipe; 17. Lifting platform; 18. Sliding slot; 19. Main box; 20. Box door; 21. Mounting column; 22. Mounting platform; 23. Connecting plate; 24. Control panel; 25. Electric telescopic rod; 26. Positioning rod; 27. Second drive chamber. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Example 1 An embodiment of the present invention provides a vehicle tire noise testing system, including a detection base 1, a mounting groove 2 is provided on the upper surface of the detection base 1, a road surface simulation component 3 is provided in the mounting groove 2, and a sound insulation cover 4, a humidity adjustment component 5 and a tire mounting component 6 are also fixedly connected to the upper surface of the detection base 1, the sound insulation cover 4 is arranged above the left end of the road surface simulation component 3, the humidity adjustment component 5 is arranged above the right end of the road surface simulation component 3, the tire mounting component 6 is arranged on the rear side of the middle part of the road surface simulation component 3, and the inner wall of the sound insulation cover 4 is pasted with sound insulation material.

[0022] Preferably, the road simulation component 3 includes: a drive shaft 7, a support shaft 8, a transmission belt 9 and a drive motor 10. The inner side of the transmission belt is respectively connected to the drive shaft 7 and the support shaft 8 for transmission. The outer surface of the transmission belt is provided with simulation patterns. The support shaft 8 is rotatably connected to the inner wall of the mounting groove 2. The rear end of the drive shaft 7 is fixedly connected to the transmission shaft 11. The transmission shaft 11 rotates and passes through the side wall of the mounting groove 2. The other end of the transmission shaft 11 is fixedly connected to the output end of the drive motor 10. The drive motor 10 is arranged in a first drive cavity 12. The first drive cavity 12 is located inside the detection base 1. Sound insulation material is pasted on the inner wall of the first drive cavity 12.

[0023] Preferably, the humidity regulating component 5 includes: a protective shell 13, a water storage chamber 14 is provided inside the protective shell 13, clean water is stored in the water storage chamber 14, a water pump is provided inside the water tank, the water outlet of the water storage chamber 14 is connected to a water pipe 15, and the water pipe 15 is connected to several water outlet pipes 16, and the water outlet of the water outlet pipe 16 is located above the pavement simulation component 3.

[0024] Preferably, the tire mounting assembly 6 includes a lifting platform 17, which is fixedly connected to the upper surface of the detection base 1. A test box assembly is provided on the front side of the lifting platform 17. A second drive cavity 27 is provided inside the lifting platform 17. A drive assembly is provided in the second drive cavity 27. The drive assembly is used to drive the test box assembly to move in the up and down directions.

[0025] Preferably, two groups of left-right symmetrical sliding grooves 18 along the up-down direction are provided on the front side of the lifting platform 17, and the test box assembly includes a main box body 19, the lower end of the main box body 19 is provided with an opening, the front end of the main box body 19 is rotatably connected to the box door 20, the rear inner wall of the main box body 19 is rotatably connected to the mounting column 21, the front end of the mounting column 21 is fixedly connected to the mounting platform 22, and the rear end of the main box body 19 is fixedly connected to two connecting plates 23, the two connecting plates 23 slide in the two sliding grooves 18 along the up-down direction respectively, and a control board 24 is fixedly connected between the two connecting plates 23, and the control board 24 is connected to the drive assembly. The inner wall of the main box body 19 is pasted with sound insulation material, and the inner wall of the main box body 19 is also provided with a number of sound detectors.

[0026] Preferably, the drive assembly includes a vertically arranged electric telescopic rod 25, which is fixedly connected to the bottom surface of the second drive cavity 27, and the telescopic end of the electric telescopic rod 25 is fixedly connected to the lower bottom surface of the control panel 24. Two positioning rods 26 are symmetrically arranged at the left and right ends of the electric telescopic rod 25, and the positioning rods 26 slide in the up and down directions through the control panel 24.

[0027] In this embodiment, the simulated texture is a texture that simulates ground conditions.

[0028] The beneficial effects of the above technical solution are: Before conducting a noise test on the tire, the staff first opens the box door 20 and manually installs the tire on the mounting platform 22. By adjusting the telescopic length of the electric telescopic rod 25, the height of the main box 19 is adjusted, so that the tire contacts the transmission belt 9.

[0029] When conducting a noise test, the drive motor 10 drives the drive shaft 7 to rotate, which in turn drives the transmission belt 9 to move, thereby driving the tire to rotate through the friction between the transmission belt 9 and the tire. The noise generated during the tire rotation is collected by a sound detector, and the noise test results of the tire are obtained by analyzing the noise data.

[0030] When the noise data of the tire on a wet road is needed, water is sprayed to the transmission belt 9 through the water outlet pipe 16 to simulate the wet road. By adjusting the amount of water sprayed, the noise data of the tire on the ground with different humidity levels is collected, thereby improving the comprehensiveness of the tire noise data collection.

[0031] By sticking sound insulation materials on the inner wall of the first driving cavity 12, the inner wall of the soundproof cover 4, and the inner wall of the main box 19, the impact of the noise generated during the operation of the equipment on the tire noise collection results is minimized, thereby improving the accuracy of the tire noise test results.

[0032] The tire is driven to rotate by the transmission belt 9, so that the driving source (driving motor 10) is kept away from the tire, thereby reducing the influence of the noise generated by the driving source on the tire noise test results, and further improving the accuracy of the tire noise test results.

[0033] Example 2 Based on Example 1, a noise analysis module is further included. The noise analysis module includes: a data receiving unit, configured to receive a noise signal detected by the sound detector; a data processing unit, configured to process the noise signal and determine the composition of the noise signal; a noise evaluation unit for obtaining an actual evaluation value of tire noise based on the analysis data set; The result output unit is used to output the test results.

[0034] Preferably, the data processing unit includes: Noise filtering subunit, used to filter the noise signal and remove the interference signal; The spectrum analysis subunit is used to perform frequency analysis on the noise signal, obtain the frequency distribution of the noise, and determine the composition of the noise signal. The composition of the noise signal includes the intensity of the tire noise, the number of influencing sound sources, and the noise intensity of the influencing sound sources.

[0035] Preferably, the decision-making unit includes: Reliability evaluation subunit, used to calculate reliability evaluation parameters of test results; ; Wherein, P is the reliability evaluation parameter of the test result; is the theoretical estimated value of tire noise; U is the actual evaluation value of tire noise; The test accuracy of the sound detector; is the unit decibel value; n is the total number of influencing sound sources; is the noise intensity from the i-th influencing sound source detected by the sound detector; It is the preset minimum noise impact intensity; is the rounding symbol; is the influence weighting coefficient of the i-th influencing sound source; m is the total number of influencing factors; is the actual average value of the jth influencing factor during the experiment; is the experimental standard setting value of the jth influencing factor; lg is the logarithmic function with base 10; The decision subunit outputs the actual evaluation value of the tire noise when the reliability evaluation parameter of the test result is greater than a preset first threshold value; otherwise, it outputs that the reliability of the test result is insufficient and guides retesting.

[0036] In this embodiment, the experimental influencing factors include: tire speed, ambient temperature, and simulated ground humidity.

[0037] In this embodiment, the theoretical estimated value of the tire noise is the tire noise intensity obtained based on theoretical calculations according to the design parameters of the tire.

[0038] In this embodiment, the minimum noise impact intensity is the noise intensity of the minimum influencing sound source that affects the noise intensity of tire noise.

[0039] In this embodiment, the influence weighting coefficient of the influencing sound source is determined based on the frequency spectrum range of the influencing sound source.

[0040] The beneficial effects of the above technical solution are: By evaluating the reliability of tire noise test results, we can ensure that the data obtained is accurate and reliable. By considering the impact of noise sources and experimental factors on the accuracy of tire noise evaluation results, we evaluate the reliability of tire noise test results and only output experimental data with sufficient reliability, avoiding the reliance on inaccurate data for decision-making.

[0041] The reliability of the test results is preliminarily evaluated by considering the test accuracy of the sound detector and the difference between the actual test results and the theoretical estimated values. The reliability of the test results is then further corrected based on the number and intensity of the influencing sound sources in the noise signal. The reliability of the test results is further corrected by the degree of difference between the influencing factors and the preset test conditions during the test process. The reliability of the tire noise test results is determined by comprehensively considering the test accuracy, the deviation between the test results and the expectations, the influencing sound sources and the influencing factors, thereby improving the accuracy of the reliability evaluation and avoiding the output of experimental data with insufficient reliability, which affects the accuracy of the experimental data.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vehicle tire noise testing system, characterized in that: The invention comprises a detection base (1), wherein the upper surface of the detection base (1) is provided with a mounting groove (2), a road surface simulation component (3) is provided in the mounting groove (2), and a sound insulation cover (4), a humidity adjustment component (5) and a tire mounting component (6) are fixedly connected to the upper surface of the detection base (1), wherein the sound insulation cover (4) is provided above the left end of the road surface simulation component (3), the humidity adjustment component (5) is provided above the right end of the road surface simulation component (3), the tire mounting component (6) is provided at the rear side of the middle part of the road surface simulation component (3), and the inner wall of the sound insulation cover (4) is pasted with sound insulation material.

2. A vehicle tire noise testing system according to claim 1, characterized in that: The road simulation component (3) comprises: a driving shaft (7), a supporting shaft (8), a transmission belt (9) and a driving motor (10); the inner side of the transmission belt is respectively connected to the driving shaft (7) and the supporting shaft (8); the outer surface of the transmission belt is provided with a simulation pattern; the supporting shaft (8) is rotatably connected to the inner wall of the mounting groove (2); the rear end of the driving shaft (7) is fixedly connected to the transmission shaft (11); the transmission shaft (11) rotates and penetrates the side wall of the mounting groove (2); the other end of the transmission shaft (11) is fixedly connected to the output end of the driving motor (10); the driving motor (10) is arranged in a first driving cavity (12); the first driving cavity (12) is located inside the detection base (1); and a sound insulation material is pasted on the inner wall of the first driving cavity (12).

3. The vehicle tire noise testing system according to claim 1, characterized in that: The humidity regulating component (5) comprises a protective shell (13), a water storage chamber (14) is provided inside the protective shell (13), clean water is stored in the water storage chamber (14), a water pump is provided inside the water tank, a water outlet of the water storage chamber (14) is connected to a water delivery pipe (15), a plurality of water outlet pipes (16) are connected to the water delivery pipe (15), and the water outlets of the water outlet pipes (16) are located above the road surface simulation component (3).

4. The vehicle tire noise testing system according to claim 1, characterized in that: The tire mounting assembly (6) includes a lifting platform (17), the lifting platform (17) is fixedly connected to the upper surface of the detection base (1), a test box assembly is arranged on the front side of the lifting platform (17), a second driving cavity (27) is arranged inside the lifting platform (17), and a driving assembly is arranged in the second driving cavity (27), and the driving assembly is used to drive the test box assembly to move in the up and down directions.

5. The vehicle tire noise testing system according to claim 4, characterized in that: The front side of the lifting platform (17) is provided with two groups of symmetrical sliding grooves (18) along the up-down direction. The test box assembly includes a main box body (19). The lower end of the main box body (19) is provided with an opening. The front end of the main box body (19) is rotatably connected to a box door (20). The rear inner wall of the main box body (19) is rotatably connected to a mounting column (21). The front end of the mounting column (21) is fixedly connected to a mounting platform (22). The rear end of the main box body (19) is fixedly connected to two connecting plates (23). The two connecting plates (23) slide in the two sliding grooves (18) along the up-down direction respectively. A control board (24) is fixedly connected between the two connecting plates (23). The control board (24) is connected to the driving assembly. The inner wall of the main box body (19) is pasted with sound insulation material. The inner wall of the main box body (19) is also provided with a plurality of sound detectors.

6. The vehicle tire noise testing system according to claim 5, characterized in that: The driving assembly includes a vertically arranged electric telescopic rod (25), the electric telescopic rod (25) is fixedly connected to the inner bottom surface of the second driving cavity (27), the telescopic end of the electric telescopic rod (25) is fixedly connected to the lower bottom surface of the control panel (24), and two positioning rods (26) are symmetrically arranged at the left and right ends of the electric telescopic rod (25), and the positioning rods (26) slide in the up and down directions and penetrate the control panel (24).

7. The vehicle tire noise testing system according to claim 5, characterized in that: It also includes a noise analysis module, which includes: a data receiving unit, configured to receive a noise signal detected by the sound detector; a data processing unit, configured to process the noise signal and determine the composition of the noise signal; a noise evaluation unit for obtaining an actual evaluation value of tire noise based on the analysis data set; The result output unit is used to output the test results.

8. The vehicle tire noise testing system according to claim 7, characterized in that: The data processing unit includes: Noise filtering subunit, used to filter the noise signal and remove the interference signal; The spectrum analysis subunit is used to perform frequency analysis on the noise signal, obtain the frequency distribution of the noise, and determine the composition of the noise signal. The composition of the noise signal includes the intensity of the tire noise, the number of influencing sound sources, and the noise intensity of the influencing sound sources.

9. The vehicle tire noise testing system according to claim 7, characterized in that: The decision-making units include: Reliability evaluation subunit, used to calculate reliability evaluation parameters of test results; ; Wherein, P is the reliability evaluation parameter of the test result; is the theoretical estimated value of tire noise; U is the actual evaluation value of tire noise; The test accuracy of the sound detector; is the unit decibel value; n is the total number of influencing sound sources; is the noise intensity from the i-th influencing sound source detected by the sound detector; It is the preset minimum noise impact intensity; is the rounding symbol; is the influence weighting coefficient of the i-th influencing sound source; m is the total number of influencing factors; is the actual average value of the jth influencing factor during the experiment; is the experimental standard setting value of the jth influencing factor; lg is the logarithmic function with base 10; The decision subunit outputs the actual evaluation value of the tire noise when the reliability evaluation parameter of the test result is greater than a preset first threshold value; otherwise, it outputs that the reliability of the test result is insufficient and guides retesting.

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