Vehicle-mounted external microphone detection device

Abstract

A vehicle-mounted external microphone detection device comprises a sound insulation cabin. Mounting frames are oppositely arranged on two sides in the sound insulation cabin; first rails are arranged at the tops of the two mounting frames; a second rail is slidably connected between the two first rails; a first motor for driving the second rail to slide on the first rail is arranged on one side of the mounting frame; a third rail is slidably arranged on the second rail; a second motor is arranged at one end of the second rail to drive the third rail to slide on the second rail; a turntable is slidably arranged on the third track; a third motor is arranged at the upper end of the third rail to drive the turntable to slide on the third rail; a loudspeaker is arranged on the lower side of the turntable; a fan is arranged at the top of the soundproof cabin; an air outlet of the fan is connected with a plurality of air pipes extending to the position, opposite to the mounting frame, in the sound insulation cabin; a plurality of air outlets are formed in the air pipe opposite to the mounting rack. According to the invention, the position of the loudspeaker is randomly adjusted through three-axis movement, so that the accurate control of the sound production position of the sound source and the simulation of any real scene position are realized.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle-mounted microphone detection devices, and in particular relates to a vehicle-mounted external microphone detection device. Background Art

[0002] Different from the microphones installed inside the car for calls and voice recognition, functional microphones are also installed outside the car, such as those used to recognize voice commands issued by users outside the car, collect audio from driving recorders, detect external emergency vehicle alarms (such as ambulance and fire truck sirens) and issue reminders to the driver, collect noise outside the car for active noise reduction inside the car, etc. Currently, most commonly used in-vehicle microphone detection devices are used for in-vehicle microphone detection. Standard sound sources are set at different locations in the car to generate sound, and then the sound sources are collected by the in-car microphones for analysis. The sensitivity of the in-car microphones is calibrated to verify whether the integrated function of the detection microphone is normal. However, these detection equipment and detection methods are not suitable for the detection of external in-vehicle microphones. Commonly used microphone detection equipment such as silencers have fixed speakers, which make it difficult to simulate sound sources with different incident angles. When you want to adjust the sound source position, you need to move it manually, which is time-consuming and labor-intensive, affecting the detection progress, or you can choose to set multiple sound sources in different positions, which increases the detection cost and setup time. Summary of the Invention

[0003] The present invention aims to provide a vehicle-mounted external microphone detection device to solve the problem of detecting vehicle-mounted external microphones. Commonly used microphone detection equipment, such as silencers, have fixed speakers, making it difficult to simulate sound sources with different incident angles. When the sound source position is to be adjusted, manual movement and adjustment are required, which is time-consuming and labor-intensive, affecting the detection progress. Alternatively, multiple sound sources at different positions are required, increasing the detection cost and setup time.

[0004] To achieve the above objectives, the specific technical solution of the vehicle-mounted external microphone detection device of the present invention is as follows:

[0005] A vehicle-mounted external microphone detection device includes a soundproof cabin; mounting frames are arranged opposite to each other on both sides of the soundproof cabin; a first track is arranged on the top of the two mounting frames; a second track is slidably connected between the two first tracks; a first motor is arranged on one side of the mounting frame to drive the second track to slide on the first track; a third track is slidably arranged on the second track; a second motor is arranged at one end of the second track to drive the third track to slide on the second track; a turntable is slidably arranged on the third track; a third motor is arranged at the upper end of the third track to drive the turntable to slide on the third track; a loudspeaker is arranged on the lower side of the turntable; a fan is arranged on the top of the soundproof cabin; a plurality of air ducts are connected to the fan outlet and extend to a position relative to the mounting frame in the soundproof cabin; and a plurality of air outlets are arranged on the air duct relative to the mounting frame.

[0006] Furthermore, a fourth motor is provided on one side of the turntable; a driven gear is provided on the lower side of the turntable for rotation; a driving gear is provided on the rotating shaft of the fourth motor and is meshedly connected with the driven gear; and a speaker is provided on the lower side of the driven gear.

[0007] Furthermore, a traveling device is provided at the bottom of the soundproof cabin between the two mounting frames; the traveling device is provided with two rollers opposite to each other; and a conveyor belt is connected between the two rollers.

[0008] Furthermore, a fifth motor is fixedly provided at one end of the traveling device; a pulley is rotatably provided at one side of the fifth motor; the fifth motor shaft wheel and the pulley are connected by a belt; and the pulley and the adjacent roller are connected by a belt.

[0009] Furthermore, the conveyor belt is provided with a plurality of protruding road condition simulation blocks according to detection requirements.

[0010] The vehicle-mounted external microphone detection device of the present invention has the following advantages: through the arrangement of the first track, the second track and the third track, the speaker installed on the turntable can be moved through three axes, and the speaker position can be arbitrarily adjusted in the soundproof cabin of the car to be tested, thereby realizing precise control of the sound source sound position and simulation of any real scene position, covering the distribution of various sound source positions in real scenes, such as pedestrians outside the car, horns of vehicles on the side, etc., especially the displacement of the speaker can realize simulation detection of dynamic sound sources, such as the situation where an ambulance passes by from far to near, and multi-angle sound source simulation of the vehicle-mounted external microphone test is carried out to improve the detection coverage range, and can be The preset and editing of the speaker movement path can be realized through software settings, and efficient and automated sound source simulation testing can be achieved without manual operation and arrangement, which increases work efficiency while reducing the workload of staff; by arranging a fourth motor and a driving gear and a driven gear on the turntable, the function of freely rotating and adjusting the speaker in the horizontal direction by the fourth motor is realized, and the function of freely adjusting the position of the speaker driven by three-axis movement is combined with the function of further improving the accuracy of the sound source simulation position during the detection of the vehicle external microphone. The rotation of the speaker realizes high-precision sound source direction directivity, which is convenient for the simulation construction of complex sound scenes and accelerates the microphone The test process of the detection; through the setting of the fan, multiple air ducts and air outlets on the sound insulation cabin, the air is blown by the fan, and the air is transported by the air duct and blown to the outside of the vehicle under detection through the air outlet, which truly simulates the wind resistance noise of the vehicle when it is moving. Through the controllable wind speed and wind pressure, the wind noise spectrum characteristics at different vehicle speeds are accurately achieved, providing accurate driving wind noise sound for the on-board external microphone, collecting accurate data, and realizing transient noise impact when the vehicle working condition changes through dynamic wind speed changes, increasing the authenticity of wind noise environment simulation, and can also test the windproof cotton of the on-board external microphone, the layout of the microphone opening, and the position structure of the microphone at different wind speeds. The microphone is further optimized by conducting sufficient sample tests and inspections on the resonance noise data of the structure. During the inspection, the fifth motor drives the adjacent rollers to rotate through the belt and pulley, driving the conveyor belt to rotate in the opposite direction of the car's travel, and cooperating with the rotation of the car's wheels to simulate the real driving state. In conjunction with the multiple road condition simulation blocks set on the conveyor belt, the dynamic vibration interference of the vehicle's mechanical vibration and road noise in the real driving environment on the on-board external microphone is increased, thereby increasing the accuracy of the data collected by the on-board external microphone. In addition, the on-board external microphone's ability to resist mechanical stress and fatigue durability is verified by simulating the real mechanical vibration of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0012] Figure 2 Schematic diagram of the internal structure cross section of the present invention;

[0013] Figure 3 For the present invention Figure 2 A magnified schematic diagram of area A in the middle;

[0014] Figure 4 This is a schematic diagram of the installation structure of the traveling device of the present invention;

[0015] Figure 5 For the present invention Figure 4 A magnified schematic diagram of area B in the middle;

[0016] Explanation of the marks in the figure: 1. Soundproof cabin; 2. Mounting frame; 3. First track; 4. Second track; 5. First motor; 6. Third track; 7. Second motor; 8. Turntable; 9. Third motor; 10. Speaker; 11. Fan; 12. Air duct; 13. Air outlet; 14. Fourth motor; 15. Driven gear; 16. Driving gear; 17. Travel device; 18. Roller; 19. Conveyor belt; 20. Fifth motor; 21. Pulley; 22. Belt; 23. Road condition simulation block. DETAILED DESCRIPTION

[0017] In order to better understand the purpose, structure and function of the present invention, a vehicle-mounted external microphone detection device of the present invention is further described in detail below with reference to the accompanying drawings.

[0018] like Figure 1-5 As shown, the present invention provides a vehicle-mounted external microphone detection device, including a soundproof cabin 1; mounting frames 2 are arranged opposite to each other on both sides of the soundproof cabin 1; a first track 3 is arranged on the top of the two mounting frames 2; a second track 4 is slidably connected and arranged between the two first track 3; a first motor 5 is arranged on one side of the mounting frame 2 to drive the second track 4 to slide on the first track 3; a third track 6 is slidably arranged on the second track 4; a second motor 7 is arranged at one end of the second track 4 to drive the third track 6 to slide on the second track 4; a turntable 8 is slidably arranged on the third track 6; a third motor 9 is arranged at the upper end of the third track 6 to drive the turntable 8 to slide on the third track 6; a speaker 10 is arranged on the lower side of the turntable 8; a fan 11 is arranged on the top of the soundproof cabin 1; a plurality of air ducts 12 are connected to the air outlet 13 of the fan 11 and extend to the position relative to the mounting frame 2 in the soundproof cabin 1; the air duct 12 is provided with a plurality of air outlets 13 at the position relative to the mounting frame 2.

[0019] Combine Figure 1-5As shown, when in use, the car to be tested for the external microphone is driven between the two mounting frames 2 in the soundproof cabin 1, and the soundproof cabin 1 is closed to form a sound insulation effect. Through the coordination between the first track 3 and the first motor 5, the second track 4 and the second motor 7, and the third track 6 and the third motor 9, the turntable 8 slidingly arranged on the third track 6 and the loudspeaker 10 arranged thereon can be moved through three axes, and the position of the loudspeaker 10 can be arbitrarily adjusted on the outside of the car to be tested in the soundproof cabin 1, so as to realize the precise control of the sound source position and the simulation of any real scene position. Afterwards, the data collected by the on-board external microphone is analyzed, and the microphone inside the car is sensitively adjusted. Sensitivity calibration is performed to verify whether the integrated function of the detection microphone is normal. The sound source position is changed by moving the position of the speaker 10, and the distribution of various sound source positions in real scenes is simulated, such as pedestrians outside the vehicle, horns of vehicles on the side, etc. In particular, the displacement of the speaker 10 can be used to simulate the detection of dynamic sound sources, such as an ambulance passing from far to near, and multi-angle sound source simulation is performed for the vehicle-mounted external microphone test to improve the detection coverage range. The moving path of the speaker 10 can be preset and edited through software settings, realizing efficient and automated sound source simulation testing without the need for manual operation and arrangement, thereby increasing work efficiency and reducing the workload of staff.

[0020] By setting the fan 11 and multiple air ducts 12 and air outlets 13 on the sound insulation cabin 1, the air is blown by the fan 11, and the air is transported by the air duct 12 and blown to the outside of the vehicle being tested through the air outlet 13, which truly simulates the wind resistance noise when the vehicle is moving. Through controllable wind speed and wind pressure, the wind noise spectrum characteristics at different vehicle speeds are accurately realized, providing accurate driving wind noise sound for the on-board external microphone, collecting accurate data, and realizing transient noise impact when the vehicle working condition changes through dynamic wind speed changes, thereby increasing the authenticity of the wind noise environment simulation, and conducting sufficient sample testing and detection on the windproof cotton of the on-board external microphone, the microphone opening layout, the microphone position structural resonance noise data at different wind speeds, etc., to further optimize the microphone.

[0021] A fourth motor 14 is provided on one side of the turntable 8; a driven gear 15 is rotatably provided on the lower side of the turntable 8; a driving gear 16 is provided on the rotating shaft of the fourth motor 14, and a meshing connection is adopted between the driven gear 15; the speaker 10 is provided on the lower side of the driven gear 15. By providing the fourth motor 14 and the driving gear 16 and the driven gear 15 on the turntable 8, the function of freely rotating and adjusting the speaker 10 in the horizontal direction by the fourth motor 14 is realized. Combined with the function of freely adjusting the position of the speaker 10 by the three-axis movement, the accuracy of the sound source simulation position during the detection of the vehicle-mounted external microphone is further improved. The high-precision sound source direction directivity is achieved through the rotation of the speaker 10, which facilitates the simulation construction of complex sound scenes and accelerates the test process of microphone detection.

[0022] A traveling device 17 is provided between the two mounting frames 2 at the bottom of the soundproof cabin 1; two rollers 18 are provided opposite to each other on the traveling device 17; a conveyor belt 19 is connected between the two rollers 18, and a plurality of protruding road condition simulation blocks 23 are provided on the conveyor belt 19 according to the detection requirements. A fifth motor 20 is fixedly provided at one end of the traveling device 17; a pulley 21 is provided on one side of the fifth motor 20 for rotation; the rotating shaft of the fifth motor 20 is connected to the pulley 21 by a belt 22; the pulley 21 is connected to the adjacent rollers 18 by a belt 22. The traveling device 17 is provided between the two mounting frames 2. Before performing the vehicle external microphone detection, the vehicle is parked above the conveyor belt 19 of the traveling device 17. During the detection process, the vehicle is started and the fifth motor 20 is started at the same time. The fifth motor 20 drives the pulley 21 to rotate through the belt 22. At the same time, the pulley 21 drives the adjacent roller 18 to rotate through the belt 22, driving the conveyor belt 19 to rotate in the opposite direction of the vehicle's travel direction. In conjunction with the rotation of the vehicle wheels, the real driving state is simulated. In conjunction with the multiple road condition simulation blocks 23 set on the conveyor belt 19, the dynamic vibration interference of the vehicle's mechanical vibration and road noise in the real driving environment on the on-board external microphone is increased, thereby increasing the accuracy of the data collected by the on-board external microphone. In addition, the mechanical stress resistance and fatigue durability of the on-board external microphone are verified by simulating the real mechanical vibration of the vehicle.

[0023] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A vehicle-mounted external microphone detection device, characterized in that: The invention comprises a soundproof cabin (1); mounting frames (2) are arranged opposite to each other on both sides of the soundproof cabin (1); a first track (3) is arranged on the top of the two mounting frames (2); a second track (4) is connected and slidably arranged between the two first tracks (3); a first motor (5) is arranged on one side of the mounting frame (2) to drive the second track (4) to slide on the first track (3); a third track (6) is slidably arranged on the second track (4); a second motor (7) is arranged at one end of the second track (4) to drive the third track (6) to slide on the second track (4) Sliding; a turntable (8) is slidably provided on the third track (6); a third motor (9) is provided at the upper end of the third track (6) to drive the turntable (8) to slide on the third track (6); a speaker (10) is provided on the lower side of the turntable (8); a fan (11) is provided on the top of the soundproof cabin (1); a plurality of air ducts (12) are connected to the air outlet (13) of the fan (11) and extend to a position in the soundproof cabin (1) relative to the mounting frame (2); a plurality of air outlets (13) are provided on the air duct (12) relative to the mounting frame (2).

2. The vehicle-mounted external microphone detection device according to claim 1, characterized in that: A fourth motor (14) is provided on one side of the turntable (8); a driven gear (15) is rotatably provided on the lower side of the turntable (8); a driving gear (16) is provided on the rotating shaft of the fourth motor (14) and is meshedly connected with the driven gear (15); and a speaker (10) is provided on the lower side of the driven gear (15).

3. The vehicle-mounted external microphone detection device according to claim 1, characterized in that: A traveling device (17) is provided at the bottom of the soundproof cabin (1) between the two mounting frames (2); two rollers (18) are provided opposite to the traveling device (17); and a conveyor belt (19) is provided between the two rollers (18).

4. The vehicle-mounted external microphone detection device according to claim 3, characterized in that: A fifth motor (20) is fixedly provided at one end of the traveling device (17); a pulley (21) is rotatably provided at one side of the fifth motor (20); a rotating shaft wheel of the fifth motor (20) and the pulley (21) are connected via a belt (22); and the pulley (21) and the adjacent roller (18) are connected via a belt (22).

5. The vehicle-mounted external microphone detection device according to claim 3, characterized in that: The conveyor belt (19) is provided with a plurality of protruding road condition simulation blocks (23) according to detection and use requirements.

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