Acoustic environment reproduction test chamber for automobile

Abstract

The invention discloses an acoustic environment reproduction test chamber for an automobile, and relates to the technical field of acoustic simulation for the automobile, the acoustic environment reproduction test chamber comprises an experiment chamber main body, an inner cavity of the experiment chamber main body is provided with an automobile simulation chamber, the experiment chamber main body is internally provided with a sound box for simulating environmental sound, and the experiment chamber main body is internally provided with a fan. The beneficial effects of the invention are that the driving motor is started to drive the fan to move, and the rotating motor is started to drive the fan to rotate, thereby facilitating the adjustment of the use position of the fan and the change of the path of the air flow, and then adjusting the speed of the air flow of the fan, thereby precisely simulating the driving environment of the vehicle at different air speeds and directions. And a user can press the positioning block inwards and pull the bottom plate upwards to enable the fixing block to be separated from the mounting opening, so that the fan is quickly disassembled, any tool is not needed in the design, and the maintenance and replacement efficiency of the test chamber is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of automobile acoustic simulation, and in particular to an automobile acoustic environment reproduction test cabin. Background Art

[0002] With the rapid development of the automobile industry and the continuous improvement of consumers' requirements for vehicle driving experience, automobile acoustic performance has gradually become one of the important indicators for measuring vehicle quality. The noise, vibration and acoustic roughness generated by the car during operation not only affect the comfort of passengers, but may also affect the durability and safety of the vehicle. Therefore, automobile manufacturers and scientific research institutions are paying more and more attention to the research and development and testing of automobile acoustic performance.

[0003] Traditional testing methods are often limited by the dangers of real road environments, and it is difficult to accurately simulate the acoustic performance of vehicles in different scenarios. Therefore, automotive acoustic environment reproduction test chambers have emerged, providing an important platform for the research and development and testing of automotive acoustic performance. In addition, in actual applications, simulation structures are usually installed in a fixed manner, and the disassembly and assembly process takes a lot of energy and time, and requires the assistance of a variety of tools, which not only increases maintenance costs, but may also affect the continuous use of the test chamber, and have an adverse effect on the flexibility, maintainability and testing efficiency of the test chamber. Therefore, an automotive acoustic environment reproduction test chamber is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art, which are limited by the danger of real road environment, and it is difficult to accurately simulate the acoustic performance of vehicles in different scenarios, and the disassembly and assembly process takes a lot of effort and time, and requires the assistance of multiple tools, which not only increases the maintenance cost but also may affect the continuous use ability of the test chamber. An automotive acoustic environment reproduction test chamber is proposed, which can accurately simulate the driving environment of the vehicle under different wind speed and wind direction conditions to solve the above problems.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] An acoustic environment reproduction test chamber for an automobile, comprising:

[0007] The main body of the experimental cabin is provided with a car simulation cabin in the inner cavity of the main body of the experimental cabin, a sound system for simulating environmental sounds is installed inside the main body of the experimental cabin, a fan is provided inside the main body of the experimental cabin, and a moving component for adjusting the position of the fan is provided inside the main body of the experimental cabin, and the moving component includes:

[0008] A sliding unit, the sliding unit comprising a connecting seat and a moving rail, the moving rail being fixedly arranged in the inner cavity of the main body of the experimental cabin, and a rotating screw being rotatably connected to the inside of the moving rail through a bearing, and a moving block being threadedly connected to the outer wall of the rotating screw, and the moving block being fixedly arranged at the bottom of the connecting seat;

[0009] The positioning unit is arranged on the connecting seat and is used to install and fix the fan on the connecting seat.

[0010] Preferably, a telescopic rod is fixedly installed on the top of the connecting seat, and a connecting box is fixedly installed on the top of the telescopic rod. A rotating motor is fixedly installed in the inner cavity of the connecting box, and a rotating plate is fixedly installed on the top output end of the rotating motor.

[0011] Preferably, the positioning unit includes a base plate and a fixed block, the base plate is fixedly installed at the bottom of the fan, and an installation opening is opened on the outer wall of the base plate, the top of the fixed block is movably inserted in the inner cavity of the installation opening, and the fixed block is fixedly installed on the outer wall of the rotating plate, a sliding groove is opened on the outer wall of the fixed block, and a positioning block is movably inserted in the inner wall of the sliding groove, and the positioning block is stuck above the installation opening.

[0012] Preferably, an extrusion spring is fixedly arranged in the inner cavity of the slide groove, and an extrusion block is fixedly arranged at the other end of the extrusion spring, and the extrusion block is fixedly arranged on the outer wall of the positioning block.

[0013] Preferably, a driving motor is fixedly provided on the top of the movable rail, a first bevel gear is fixedly provided on the outer wall of the bottom output end of the driving motor, a second bevel gear is fixedly provided on the outer wall of the rotating screw, and the outer wall of the first bevel gear is meshingly connected with the outer wall of the second bevel gear.

[0014] Preferably, a movable groove is formed on the outer wall of the movable rail, and a pulley is rotatably connected to the outer wall of the connecting seat via a pin shaft, and the pulley is movably engaged in the inner cavity of the movable groove.

[0015] Preferably, a base is fixedly arranged inside the main body of the experimental cabin, and a cylinder is arranged in the inner cavity of the base, and the top output end of the cylinder extends upward through the base and is fixedly arranged on the bottom of the automobile simulation cabin.

[0016] Preferably, a seat is fixedly arranged in the inner cavity of the automobile simulation cabin, and a control console is fixedly installed in the inner cavity of the automobile simulation cabin, and a door is rotatably connected to the outer wall of the automobile simulation cabin through a hinge.

[0017] Preferably, a step is fixedly provided on the outer wall of the automobile simulation cabin, a slot is provided on the top of the base, and the bottom of the step is movably inserted into the inner wall of the slot.

[0018] Preferably, the outer wall of the experimental cabin body is rotatably connected to a cabin door via a hinge, a display screen is fixedly arranged inside the experimental cabin body, and a noise reduction plate is fixedly attached to the inner wall of the experimental cabin body.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by setting the connection relationship between the experimental cabin main body, the automobile simulation cabin, the control panel, the audio system, the fan, the rotating motor and the moving rail, the driving motor is started to drive the rotating screw to rotate, so that the connecting seat drives the fan to move, and the rotating motor is started to drive the fan to rotate, which is convenient for adjusting the use position of the fan and is beneficial for changing the path of the wind flow. By adjusting the speed of the fan wind flow, the driving environment of the vehicle under different wind speeds and wind directions can be accurately simulated, so as to switch different test scenes and flexibly meet diverse test needs. By setting the connection relationship between the rotating plate, the fixed block, the positioning block and the mounting port, the user can easily press the positioning block inward and pull the bottom plate upward to make the fixed block detach from the mounting port, thereby realizing the rapid disassembly of the fan. This design does not require the use of any tools, is simple and quick to operate, greatly improves the maintenance and replacement efficiency of the test cabin, and provides great convenience for users.

[0021] 2. In the present invention, by setting the connection relationship between the base, the cylinder and the car simulation cabin, the cylinder can be started so that the output end of the cylinder drives the base to move upward, and the upward moving base drives the car simulation cabin to move upward, which is convenient for adjusting the position height of the car simulation cabin and can simulate the acoustic environment under different ground heights or vehicle postures, which is helpful to evaluate the acoustic performance of the vehicle under different driving conditions and ensure the comprehensiveness and accuracy of the test results.

[0022] 3. In the present invention, by setting the connection relationship between the car simulation cabin, the steps and the slot, when the car simulation cabin moves downward, the steps are driven to move downward, so that the bottom of the steps is put into the slot, which is convenient for folding and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the main structure of the experimental cabin of the present invention;

[0026] Figure 3 It is a schematic diagram of the base structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the connecting seat of the present invention;

[0028] Figure 5 It is a cross-sectional view of the movable rail structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the bottom plate structure of the present invention;

[0030] Figure 7 It is a cross-sectional view of the fixing block structure of the present invention.

[0031] Serial numbers in the figure: 1. Experimental cabin body; 101. Hatch door; 2. Automobile simulation cabin; 201. Seat; 202. Control panel; 203. Door; 3. Base; 301. Cylinder; 302. Step; 303. Slot; 4. Speaker; 5. Display screen; 6. Noise reduction board; 7. Fan; 701. Bottom plate; 702. Mounting port; 8. Connecting seat; 801. Telescopic rod; 802. Connecting box; 803. Rotating motor; 804. Rotating plate; 805. Fixed block; 806. Slide groove; 807. Extrusion spring; 808. Extrusion block; 809. Positioning block; 810. Moving block; 811. Pulley; 9. Moving rail; 901. Rotating screw; 902. Driving motor; 903. First bevel gear; 904. Second bevel gear; 905. Moving groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Embodiment: This embodiment provides an automotive acoustic environment reproduction test chamber, see Figure 1-7 , specifically, including:

[0034] The main body 1 of the test cabin is provided with a car simulation cabin 2 in the inner cavity of the main body 1 of the test cabin. A sound system 4 for simulating environmental sounds is installed inside the main body 1 of the test cabin. A fan 7 is provided inside the main body 1 of the test cabin. By starting the fan 7, the fan 7 blows air to the car simulation cabin 2 to simulate the influence of wind on the sound environment, so as to improve and optimize the vehicle according to the test results to reduce the wind noise level and improve the driving experience of passengers. A moving component for adjusting the position of the fan 7 is provided inside the main body 1 of the test cabin. Two groups of fans 7 and moving components are provided and are symmetrically distributed. The moving component includes:

[0035] The sliding unit includes a connecting seat 8 and a moving rail 9. The moving rail 9 is fixedly arranged in the inner cavity of the experimental cabin body 1, and the inside of the moving rail 9 is rotatably connected with a rotating screw 901 through a bearing, and the outer wall of the rotating screw 901 is threadedly connected with a moving block 810, and the moving block 810 is fixedly arranged at the bottom of the connecting seat 8. When in use, the rotating screw 901 is rotated clockwise, so that the rotating screw 901 rotating clockwise drives the moving block 810 to move right, so that the moving block 810 moving rightward drives the connecting seat 8 to move rightward, and the connecting seat 8 moving rightward drives the fan 7 to move rightward, so that the position of the fan 7 is adjusted. By adjusting the position of the fan 7, different test scenes can be easily switched, the path of the wind flow can be changed, and the wind speed of the fan 7 can be adjusted, so as to accurately simulate the driving environment of the vehicle under different wind speeds and wind directions, and flexibly meet diverse test needs;

[0036] The positioning unit is arranged on the connecting seat 8 , and is used to install and fix the fan 7 on the connecting seat 8 .

[0037] A telescopic rod 801 is fixedly installed on the top of the connecting seat 8, and a connecting box 802 is fixedly installed on the top of the telescopic rod 801. A rotating motor 803 is fixedly installed in the inner cavity of the connecting box 802, and a rotating plate 804 is fixedly installed at the output end of the top of the rotating motor 803. By starting the rotating motor 803, the output end of the rotating motor 803 drives the rotating plate 804 to rotate, so that the rotating rotating plate 804 drives the fan 7 to rotate, simulating different directions of wind blowing.

[0038] The positioning unit includes a bottom plate 701 and a fixing block 805. The bottom plate 701 is fixedly mounted on the bottom of the fan 7, and a mounting opening 702 is provided on the outer wall of the bottom plate 701. The top of the fixing block 805 is movably plugged into the inner cavity of the mounting opening 702, and the fixing block 805 is fixedly mounted on the outer wall of the rotating plate 804. A sliding groove 806 is provided on the outer wall of the fixing block 805, and a positioning block 809 is movably plugged into the inner wall of the sliding groove 806. The positioning block 809 is stuck above the mounting opening 702. When in use, the user aligns the mounting opening 702 with the fixing block 805 and moves the bottom plate 701 downward to fix the fixing block 805. The fixed block 805 is fully inserted into the installation opening 702. At this time, the positioning block 809 moves outward and is stuck above the installation opening 702, so that the base plate 701 is installed and fixed on the rotating plate 804, so that the fan 7 is installed and restricted on the rotating plate 804, and the positioning block 809 is pressed inward to make the positioning block 809 retract into the slide groove 806. At this time, by pulling the base plate 701 upward, the fixing block 805 is disengaged from the installation opening 702, so that the fan 7 can be removed from the rotating plate 804. The operation does not require the cooperation of tools, is simple and fast, and is convenient for improving its operating efficiency and convenient to use.

[0039] An extrusion spring 807 is fixedly provided in the inner cavity of the slide groove 806, and an extrusion block 808 is fixedly provided at the other end of the extrusion spring 807. The extrusion block 808 is fixedly provided on the outer wall of the positioning block 809. The extrusion block 808 is pushed outward by the driving force of the extrusion spring 807, so that the extrusion block 808 moving outward drives the positioning block 809 to move outward, so that the positioning block 809 moves outward and is stuck above the installation port 702, and maintains this position without adjustment, thereby further improving the installation stability.

[0040] A driving motor 902 is fixedly provided on the top of the movable rail 9, and a first bevel gear 903 is fixedly provided on the outer wall of the bottom output end of the driving motor 902, and a second bevel gear 904 is fixedly provided on the outer wall of the rotating screw 901, and the outer wall of the first bevel gear 903 is meshingly connected with the outer wall of the second bevel gear 904. By starting the driving motor 902, the output end of the driving motor 902 drives the first bevel gear 903 to rotate clockwise, and the outer wall of the clockwise rotating first bevel gear 903 squeezes and pushes the second bevel gear 904 to rotate counterclockwise, so that the counterclockwise rotating second bevel gear 904 drives the rotating screw 901 to rotate counterclockwise, so that the moving block 810 is driven to move to the left, and the fan 7 is driven to move to the left, so as to facilitate the adjustment of the use position of the fan 7.

[0041] A moving groove 905 is provided on the outer wall of the moving rail 9, and a pulley 811 is rotatably connected to the outer wall of the connecting seat 8 through a pin shaft, and the pulley 811 is movably engaged in the inner cavity of the moving groove 905, which limits the moving direction and moving path of the connecting seat 8, and is convenient for reducing the friction generated when the connecting seat 8 moves, making it convenient to move.

[0042] A base 3 is fixedly arranged inside the experimental cabin body 1, and a cylinder 301 is arranged in the inner cavity of the base 3. The top output end of the cylinder 301 extends upward through the base 3 and is fixedly arranged at the bottom of the automobile simulation cabin 2. By starting the cylinder 301, the output end of the cylinder 301 drives the base 3 to move upward, so that the upward moving base 3 drives the automobile simulation cabin 2 to move upward, which is convenient for adjusting the position height of the automobile simulation cabin 2 and can simulate the acoustic environment under different ground heights or vehicle postures, which is helpful to evaluate the acoustic performance of the vehicle under different driving conditions and ensure the comprehensiveness and accuracy of the test results.

[0043] A seat 201 is fixedly installed in the inner cavity of the car simulation cabin 2. Two sets of microphones are arranged at the headrest of the seat 201 for collecting noise data at the two ears. The noise signal in the car simulation cabin 2 is collected through the microphone, and then the data is transmitted to the central system for comparison with the real car noise data, so as to simulate the real car noise environment. A control panel 202 is fixedly installed in the inner cavity of the car simulation cabin 2. The control panel 202 is used for overall control of the operating conditions of various equipment in the experimental cabin body 1, which is convenient for users to operate and adjust. The outer wall of the car simulation cabin 2 is rotatably connected to a car door 203 through a hinge.

[0044] A step 302 is fixedly arranged on the outer wall of the car simulation cabin 2, a slot 303 is opened on the top of the base 3, and the bottom of the step 302 is movably inserted into the inner wall of the slot 303. When the car simulation cabin 2 moves upward, the step 302 is driven to move upward, which is convenient for the user to enter the car simulation cabin 2, and when the car simulation cabin 2 moves downward, the step 302 is driven to move downward, so that the bottom of the step 302 is received in the slot 303, which is convenient for folding and easy to use.

[0045] The outer wall of the experimental cabin body 1 is connected to the cabin door 101 by hinges. A display screen 5 is fixedly installed inside the experimental cabin body 1 to simulate the environment and further improve the authenticity. A noise reduction plate 6 is fixedly attached to the inner wall of the experimental cabin body 1 to facilitate sound collection and reduce the impact of external sounds on the experiments in the experimental cabin body 1.

[0046] Specifically, the working principle and operation method of the present invention are as follows: when in use, the user sits on the seat 201, starts the audio 4 through the control panel 202 to simulate the environmental sound, and then starts the fan 7 through the control panel 202, and the fan 7 blows air to the car simulation cabin 2 to simulate the influence of wind on the sound environment, and starts the drive motor 902, so that the output end of the drive motor 902 drives the first bevel gear 903 to rotate counterclockwise, so that the second bevel gear 904 is driven to rotate clockwise, and the second bevel gear 904 that rotates clockwise drives the rotating screw 901 to rotate clockwise, so that the moving block 810 and the connecting seat 8 move to the right, so that the fan 7 moves to the right, and the rotating motor 803 is started, so that the rotating motor 803 The output end drives the rotating plate 804 to rotate, so that the rotating rotating plate 804 drives the fan 7 to rotate, which is convenient for adjusting the use position of the fan 7 and changing the path of the wind flow. Then, by adjusting the speed of the wind flow of the fan 7, different test scenes can be switched, so as to accurately simulate the driving environment of the vehicle under different wind speeds and wind directions, and flexibly meet the diverse test needs. By starting the cylinder 301, the output end of the cylinder 301 drives the base 3 to move upward, so that the upwardly moving base 3 drives the car simulation cabin 2 to move upward, which is convenient for adjusting the position height of the car simulation cabin 2, and can simulate the acoustic environment under different ground heights or vehicle postures, which is helpful to evaluate the acoustic performance of the vehicle under different driving conditions, and ensure the comprehensiveness and accuracy of the test results;

[0047] When in use, the user aligns the mounting opening 702 with the fixing block 805 and moves the bottom plate 701 downward so that the fixing block 805 is completely inserted into the mounting opening 702. At this time, the pushing force of the extrusion spring 807 pushes the extrusion block 808 outward, so that the extrusion block 808 moving outward drives the positioning block 809 to move outward, so that the positioning block 809 moves outward and is stuck above the mounting opening 702, so that the bottom plate 701 is installed and fixed on the rotating plate 804, so that the fan 7 is installed and restricted on the rotating plate 804, and the positioning block 809 is pressed inwardly so that the positioning block 809 is received in the slide groove 806. At this time, by pulling the bottom plate 701 upward, the fixing block 805 is disengaged from the mounting opening 702, so that the fan 7 is easily removed from the rotating plate 804. The operation does not require the cooperation of tools, is simple and fast, and is convenient for improving its operating efficiency and convenient for use.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automotive acoustic environment reproduction test cabin, comprising a test cabin body (1), an automotive simulation cabin (2) being arranged in the inner cavity of the test cabin body (1), and a sound system (4) for simulating environmental sounds being installed inside the test cabin body (1), characterized in that: A fan (7) is arranged inside the experimental cabin body (1), and a moving component for adjusting the position of the fan (7) is arranged inside the experimental cabin body (1), and the moving component comprises: A sliding unit, the sliding unit comprising a connecting seat (8) and a moving rail (9), the moving rail (9) being fixedly arranged in the inner cavity of the experimental cabin body (1), and the interior of the moving rail (9) being rotatably connected to a rotating screw (901) via a bearing, and the outer wall of the rotating screw (901) being threadedly connected to a moving block (810), and the moving block (810) being fixedly arranged at the bottom of the connecting seat (8); A positioning unit is arranged on the connecting seat (8), and the positioning unit is used to install and fix the fan (7) on the connecting seat (8).

2. The automotive acoustic environment reproduction test chamber according to claim 1, characterized in that: A telescopic rod (801) is fixedly mounted on the top of the connection seat (8), and a connection box (802) is fixedly mounted on the top of the telescopic rod (801). A rotating motor (803) is fixedly mounted in the inner cavity of the connection box (802), and a rotating plate (804) is fixedly mounted on the top output end of the rotating motor (803).

3. The automotive acoustic environment reproduction test chamber according to claim 1, characterized in that: The positioning unit comprises a base plate (701) and a fixed block (805); the base plate (701) is fixedly mounted on the bottom of the fan (7), and an outer wall of the base plate (701) is provided with an installation opening (702); the top of the fixed block (805) is movably inserted into the inner cavity of the installation opening (702), and the fixed block (805) is fixedly mounted on the outer wall of the rotating plate (804); a sliding groove (806) is provided on the outer wall of the fixed block (805), and a positioning block (809) is movably inserted into the inner wall of the sliding groove (806); and the positioning block (809) is stuck above the installation opening (702).

4. The automotive acoustic environment reproduction test chamber according to claim 3, characterized in that: An extrusion spring (807) is fixedly arranged in the inner cavity of the slide groove (806), and an extrusion block (808) is fixedly arranged at the other end of the extrusion spring (807), and the extrusion block (808) is fixedly arranged on the outer wall of the positioning block (809).

5. The automotive acoustic environment reproduction test chamber according to claim 1, characterized in that: A driving motor (902) is fixedly arranged on the top of the movable rail (9), a first bevel gear (903) is fixedly arranged on the outer wall of the bottom output end of the driving motor (902), a second bevel gear (904) is fixedly arranged on the outer wall of the rotating screw (901), and the outer wall of the first bevel gear (903) is meshingly connected with the outer wall of the second bevel gear (904).

6. The automotive acoustic environment reproduction test chamber according to claim 5, characterized in that: The outer wall of the movable rail (9) is provided with a movable groove (905), and the outer wall of the connecting seat (8) is rotatably connected with a pulley (811) via a pin shaft, and the pulley (811) is movably engaged in the inner cavity of the movable groove (905).

7. The automotive acoustic environment reproduction test chamber according to claim 1, characterized in that: A base (3) is fixedly arranged inside the experimental cabin body (1), and a cylinder (301) is arranged in the inner cavity of the base (3); the top output end of the cylinder (301) passes through the base (3) and extends upward and is fixedly arranged on the bottom of the automobile simulation cabin (2).

8. The automotive acoustic environment reproduction test chamber according to claim 7, characterized in that: A seat (201) is fixedly arranged in the inner cavity of the automobile simulation cabin (2), and a control console (202) is fixedly installed in the inner cavity of the automobile simulation cabin (2); and a door (203) is rotatably connected to the outer wall of the automobile simulation cabin (2) via a hinge.

9. The automotive acoustic environment reproduction test chamber according to claim 8, characterized in that: The outer wall of the automobile simulation cabin (2) is fixedly provided with a step (302), the top of the base (3) is provided with a slot (303), and the bottom of the step (302) is movably inserted into the inner wall of the slot (303).

10. The automotive acoustic environment reproduction test chamber according to claim 9, characterized in that: The outer wall of the experimental cabin body (1) is rotatably connected to a cabin door (101) via hinges, a display screen (5) is fixedly arranged inside the experimental cabin body (1), and a noise reduction plate (6) is fixedly attached to the inner wall of the experimental cabin body (1).

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