Vehicle-mounted microphone adjusting system

Abstract

The invention provides a vehicle-mounted microphone adjusting system which comprises a vehicle state sensing unit which is connected with a vehicle CAN bus and obtains vehicle speed, vehicle window opening degree and air conditioner wind speed data in real time. The distributed microphone array comprises a plurality of sound transmission assemblies which are arranged on a car roof console and embedded in a column A. Each sound transmission assembly comprises an oval shell, a main board and a microphone which are arranged in the shell, a sound collection column which penetrates through the shell, and a driving assembly which drives the sound collection column to swing. And the audio processor is used for carrying out balance adjustment on the data of the vehicle state sensing unit and the detection audio data of the distributed microphone and carrying out noise processing. The sound transmission assemblies and the distributed microphone arrays are embedded in the roof console and the vehicle A column to form a network, voice information is collected through the sound transmission assemblies at different positions, vehicle environment data and voice receiving data are collected through the audio processor, noise is eliminated, and stable volume is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted devices, and particularly to a vehicle-mounted microphone adjustment system. Background Art

[0002] A microphone module facing outside the vehicle is installed on the inner surface of the vehicle body. The vehicle body is provided with a sound inlet hole for the microphone module, and a waterproof film covering the sound inlet hole is pasted on the inner surface of the vehicle body. Traditional vehicle-mounted microphones use fixed-directional sound pickup. Usually, multiple microphones are installed at fixed positions inside the vehicle, such as on the roof ceiling or the center console. Their sound pickup directions are fixed. When the position of the passenger changes, they may be blocked by objects or too far away, resulting in unclear sound collection and poor sound pickup effect.

[0003] A microphone generally picks up sound through a diaphragm. The diaphragm is the core component of the microphone. It vibrates with the impact of sound waves, and this vibration is converted into an electrical signal. Specifically, the movement of the diaphragm generates a continuously changing voltage. When the diaphragm moves in one direction, the voltage value is positive; when it moves in the opposite direction, the voltage value is negative.

[0004] In practical applications, the internal environment of the vehicle has a direct impact on the sound quality of the microphone. For example, mechanical noises such as vehicle engine noise and tire friction noise will interfere with the sound pickup effect of the microphone, making the sound quality turbid. Secondly, electrical devices inside the vehicle, such as air conditioners and stereos, may also generate electromagnetic interference, affecting the normal operation of the microphone, thus affecting the traceability of sound by the monitoring sensor, resulting in errors in sound collection effect and unable to provide clearer and more stable voice communication. Summary of the Invention

[0005] In view of this, the present invention aims to propose a vehicle-mounted microphone adjustment system, which can adjust the angle of the sound collection device of the microphone, reduce the influence of noise, and improve the sound collection effect.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] A vehicle-mounted microphone adjustment system includes a vehicle state perception unit, which is connected to the vehicle CAN bus and obtains vehicle speed, window opening degree, and air conditioner wind speed data in real time;

[0008] A distributed microphone array includes several sound transmission components placed on the roof console and embedded in the A-pillar. The sound transmission component includes an oval-shaped housing, a main board and a microphone arranged in the housing, a sound collection column penetrating the housing, and a driving component for driving the sound collection column to swing;

[0009] An audio processor equalizes and adjusts the data of the vehicle state perception unit and the detected audio data of the distributed microphone, and performs noise processing.

[0010] Further, the sound transmission component further includes a base that is fastened to the outer shell, and the base is connected to the vehicle body;

[0011] A main board is provided on the base, and the microphone is disposed above the main board;

[0012] Protecting plates are provided at both the upper and lower ends of the main board, and a noise-proof member is provided to cover the outside of the microphone, and the noise-proof member is connected to the protecting plate;

[0013] The main board is electrically connected to the microphone.

[0014] Further, an opening is provided at the upper part of the housing, and a flexible gland for plugging is provided at the opening. The sound collection column penetrates through the gland and is partially disposed outside the housing;

[0015] Collection holes are provided on the sound collection column, a cavity is provided inside the gland, a protective cover is provided outside the microphone, and the protective cover abuts against the base to form a receiving cavity;

[0016] A sound transmission tube is provided between the receiving cavity and the cavity, and the collection holes are communicated with the cavity.

[0017] Further, the housing includes a buffer section, a rising section, a leeward section, and a downhill section that are connected in sequence;

[0018] The opening is provided in the leeward section, and a diaphragm is further provided outside the gland.

[0019] Further, a connecting plate is provided between the protective cover and the housing. A holding seat is provided on the connecting plate, a rotating cavity is formed inside the holding seat, and a sphere adapted to the rotating cavity is provided at one end of the sound collection column;

[0020] The driving component drives the sphere to rotate relative to the rotating cavity.

[0021] Further, the driving component includes a driving part connected to the base, a driving shaft provided at the power output end of the driving part, a gear assembly connected to the driving shaft, and the power output end of the gear assembly is inserted into the holding seat;

[0022] A sliding track is provided on the holding seat. The driving part drives the gear assembly to transmit power, and the power output end of the gear assembly slides along the sliding track to rotate the sphere.

[0023] Further, the gear assembly includes a driving shaft, a driving bevel gear provided on the driving shaft, a sliding shaft inserted radially along the sphere, and two relatively arranged driven bevel gears sleeved on the sliding shaft;

[0024] One end of the sliding shaft protrudes from the sphere and is arranged in the sliding track, and the other end of the sliding shaft is fixed to the sphere by bolts;

[0025] When the driving part drives the driving shaft to rotate, the sliding shaft slides along the sliding track.

[0026] Further, the sliding track includes an annular section arranged radially along the sphere, and bent sections connected to both sides of the annular section, and a transition section is provided between the bent section and the annular section;

[0027] When the sliding shaft slides in the annular section, the sound collection tube rotates, and when the sliding shaft slides in the bent section, the sound collection tube swings relative to the housing.

[0028] Further, the holding seat includes a top cover and a support seat, and the top cover is fixedly connected to the support seat by bolts;

[0029] A first concave arc groove is formed on the top cover, a second concave arc groove is provided on the support seat, and the sphere is arranged in the space surrounded by the first concave arc groove and the second concave arc groove;

[0030] The sliding track is arranged in the second concave arc groove.

[0031] Further, a cylindrical groove is also formed on the support seat, the upper end of the cylindrical groove is open, and a protruding part for blocking the opening is provided on the top cover;

[0032] The second concave arc groove communicates with the bottom of the cylindrical groove, the annular section is arranged on one side close to the cylindrical groove, and the bent section extends downward.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] In the vehicle-mounted microphone adjustment system of the present invention, a vehicle state perception unit is set to obtain vehicle speed, window opening degree, and air conditioner wind speed data, and vehicle environment data is established. A sound transmission component is embedded on the roof console and the vehicle A-pillar, and a distributed microphone array forms a network. Voice information is collected through the sound transmission components at different positions to establish voice reception data. The vehicle environment data and voice reception data are collected by an audio processor, and the gain of the above audio data is adjusted, for example, enhancing bass or weakening harsh high frequencies, and a compressor and a limiter are used to suppress large dynamic distortion and eliminate noise to ensure stable volume.

[0035] According to the sound collection data of the microphone, the direction of the sound source is judged, and the driving component adjusts the sound collection column to move to the optimal position for data re-collection. The final data after multiple data collections by the audio processor is more stable, improving the sound collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 are those described in the embodiments of the present invention;

[0038] Figure 2 are those described in the embodiments of the present invention;

[0039] Figure 3 are those described in the embodiments of the present invention;

[0040] DESCRIPTION OF REFERENCE NUMERALS:

[0041] 1. Housing; 2. Main board; 3. Microphone; 4. Sound collection column; 5. Driving component; 6. Base; 7. Guard plate; 8. Noise prevention component; 9. Protective cover; 10. Accommodating cavity; 11. Transmission pipe; 12. Pressing cover; 13. Connecting plate; 14. Holding seat; 15. Film;

[0042] 101. Opening; 102. Buffer section; 103. Rising section; 104. Leeward section; 105. Downhill section;

[0043] 401. Collection hole; 402. Sphere;

[0044] 501. Driving part; 502. Driving shaft; 503. Driving shaft; 504. Driving bevel gear; 505. Sliding shaft; 506. Driven bevel gear;

[0045] 1201. Cavity;

[0046] 1401. Sliding track; 1402. Top cover; 1403. Support seat;

[0047] 14011. Annular section; 14012. Bent section; 14013. Transition section;

[0048] 14021. First concave arc groove; 14022. Protrusion;

[0049] 14031. Second concave arc groove; 14032. Cylindrical groove. DETAILED DESCRIPTION OF THE INVENTION

[0050] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0053] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0054] This embodiment relates to a vehicle-mounted microphone 3 adjustment system. The adjustment system includes a vehicle state perception unit, which is connected to the vehicle CAN bus and obtains vehicle speed, window opening, and air conditioner wind speed data in real time. A distributed microphone 3 array, including a plurality of sound transmission components placed on the roof console and embedded in the A-pillar. The sound transmission component includes an elliptical housing 1, a main board 2 and a microphone 3 provided in the housing 1, a sound collection column 4 penetrating the housing 1, and a driving component 5 for driving the sound collection column 4 to swing. An audio processor, which performs equalization adjustment on the data of the vehicle state perception unit and the detected audio data of the distributed microphone 3, and performs noise processing.

[0055] The vehicle-mounted microphone 3 adjustment system of this embodiment obtains vehicle speed, window opening, and air conditioner wind speed data by setting a vehicle state perception unit to establish vehicle environment data. Sound transmission components are embedded on the roof console and the vehicle A-pillar, and the distributed microphone 3 array forms a network. Voice information is collected through the sound transmission components at different positions to establish voice reception data. The vehicle environment data and voice reception data are collected by the audio processor, and the gain of the above audio data is adjusted, for example, enhancing bass or weakening harsh high frequencies, and a compressor and a limiter are used to suppress large dynamic distortion and eliminate noise to ensure stable volume.

[0056] According to the sound collection data of the microphone 3, the direction of the sound source is judged, and the driving component 5 adjusts the sound collection column 4 to move to the best position for data re-collection. The final data after the audio processor repeatedly collects stable data is more stable, improving the sound collection effect.

[0057] Based on the above overall introduction, an exemplary structure of the in-vehicle microphone 3 adjustment system in this embodiment. The vehicle state perception unit in this embodiment includes detection instruments such as wheel speed sensors, accelerometers, and gyroscopes. The audio processor in this embodiment adopts an existing technology structure to meet its signal processing and sound quality optimization functions, and can also achieve signal distribution and multi-zone audio management. The specific structure of the audio processor refers to the existing technology and will not be elaborated here.

[0058] As an alternative implementation, as Figure 1 shown, the sound transmission component further includes a base 6 that is fastened to the housing 1. The base 6 is connected to the vehicle body. A main board 2 is provided on the base 6. The microphone 3 is disposed above the main board 2. Protective plates 7 are provided at both the upper and lower ends of the main board 2. A noise-proof member 8 is provided outside the microphone 3. The noise-proof member 8 is connected to the protective plate 7. The main board 2 is electrically connected to the microphone 3. The noise-proof member 8 in this embodiment uses sound insulation cotton.

[0059] Furthermore, as Figure 1 shown, an opening 101 is provided in the upper part of the housing. A flexible gland 12 is provided at the opening 101. The sound collection column 4 penetrates through the gland 12 and is partially disposed outside the housing. Collection holes 401 are provided on the sound collection column 4. A cavity 1201 is provided inside the gland 12. A protective cover 9 is provided outside the microphone 3. The protective cover 9 abuts against the base 6 to form a receiving cavity 10. A sound transmission tube 11 is provided between the receiving cavity 10 and the cavity 1201. The collection holes 401 are communicated with the cavity 1201. The audio data collected through the collection holes 401 is transported to the receiving cavity 10 through the cavity 1201 of the gland 12 and the transmission tube 11, reducing the noise caused by the driving component 5, reducing background noise, and improving the sound collection quality.

[0060] In addition, as Figure 1 shown, the housing includes a buffer section 102, a rising section 103, a leeward section 104, and a downhill section 105 that are connected in sequence. The opening 101 is provided in the leeward section 104. A diaphragm is further provided outside the gland 12. The diaphragm in this embodiment uses a peek film 15, which has good sound insulation effect, can effectively reduce noise, and improve the comfort of the user.

[0061] As Figure 1 shown, a connecting plate 13 is provided between the protective cover 9 and the housing. A holding seat 14 is provided on the connecting plate. A rotating cavity is formed inside the holding seat 14. One end of the sound collection column 4 is provided with a sphere 402 adapted to the rotating cavity; the driving component 5 drives the sphere 402 to rotate relative to the rotating cavity. By setting it like this, the movement flexibility of the sound collection column 4 is increased.

[0062] Specifically, as Figure 2 and Figure 3As shown, the driving assembly 5 includes a driving part 501 connected to the base 6, a driving shaft 502 provided at the power output end of the driving part 501. A gear assembly is connected to the driving shaft 502, and the power output end of the gear assembly is inserted into the holding seat 14. A sliding track 1401 is provided on the holding seat 14. The driving part 501 drives the gear assembly to transmit power, and the power output end of the gear assembly slides along the sliding track 1401 to rotate the sphere 402.

[0063] Moreover, the gear assembly includes a driving shaft 503, a driving bevel gear 504 provided on the driving shaft 503, a sliding shaft 505 inserted radially along the sphere 402, and two relatively arranged driven bevel gears 506 sleeved on the sliding shaft 505. One end of the sliding shaft 505 protrudes from the sphere 402 and is arranged in the sliding track 1401, and the other end of the sliding shaft 505 is fixed to the sphere 402 by bolts. When the driving part 501 drives the driving shaft 503 to rotate, the sliding shaft 505 slides along the sliding track 1401. The driving part 501 adopts a servo motor and drives the sliding shaft 505 to rotate along the axis of the driving shaft 503 by the differential principle.

[0064] Preferably, as Figures 2 to 3 shown, the sliding track 1401 includes an annular section 14011 arranged radially along the sphere 402, and bending sections 14012 connected to both sides of the annular section 14011. A transition section 14013 is provided between the bending section 14012 and the annular section 14011. When the sliding shaft 505 slides in the annular section 14011, the sound collection tube rotates. When the sliding shaft 505 slides in the bending section 14012, the sound collection tube swings relative to the housing. By providing the transition section 14013, the sliding smoothness of the sliding shaft 505 is improved, and by providing the bending section 14012, the angle between the collection tube and the vehicle body can be adjusted, so as to facilitate better searching for the sound direction and improve the collection effect of the sound transmission assembly.

[0065] For the convenience of installation, as Figures 2 to 3 shown, the holding seat 14 includes a top cover 1402 and a support seat 1403. The top cover 1402 is fixedly connected to the support seat 1403 by bolts. A first concave arc groove 14021 is formed on the top cover 1402, and a second concave arc groove 14031 is provided on the support seat 1403. The sphere 402 is arranged in the space surrounded by the first concave arc groove 14021 and the second concave arc groove 14031. The sliding track 1401 is arranged in the second concave arc groove 14031. With such a setting, it is convenient for the installation of the sound collection column 4 and the holding seat 14, which is convenient for production implementation.

[0066] Furthermore, as Figures 2 to 3As shown in the figure, a cylindrical groove 14032 is also formed on the support base 1403. The upper end of the cylindrical groove 14032 is open 101. A protruding portion 14022 for blocking the opening 101 is provided on the top cover 1402. The second concave arc groove 14031 communicates with the bottom of the cylindrical groove 14032. The annular section 14011 is arranged on one side close to the cylindrical groove 14032, and the bent section 14012 extends downward from top to bottom. The provision of the protruding portion 14022 makes it easier to place the sphere 402 between the first concave arc groove 14021 and the second concave arc groove 14031, preventing the sphere 402 from coming out during the movement.

[0067] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted microphone (3) adjustment system, characterized in that: It includes a vehicle status sensing unit, which is connected to the vehicle CAN bus and obtains vehicle speed, window opening degree, and air conditioner wind speed data in real time; A distributed microphone (3) array, including several sound transmission components placed on the roof console and embedded in the A-pillar. The sound transmission component includes an oval housing (1), a main board (2) and a microphone (3) arranged in the housing (1), a sound collection column (4) penetrating the housing (1), and a driving component (5) for driving the sound collection column (4) to swing; An audio processor that performs equalization adjustment on the data of the vehicle status sensing unit and the detected audio data of the distributed microphone (3), and performs noise processing.

2. The vehicle-mounted microphone (3) adjustment system according to claim 1, characterized in that: The sound transmission component further includes a base (6) fastened to the housing (1), and the base (6) is connected to the vehicle body; The base (6) is provided with a main board (2), and the microphone (3) is arranged above the main board (2); Both the upper and lower ends of the main board (2) are provided with protective plates (7), and a noise-proof member (8) covering the outside of the microphone (3) is provided, and the noise-proof member (8) is connected to the protective plate (7); The main board (2) is electrically connected to the microphone (3).

3. The vehicle-mounted microphone (3) adjustment system according to claim 2, characterized in that: An opening (101) is provided in the upper part of the housing, and a flexible gland (12) for plugging is provided at the opening (101). The sound collection column (4) penetrates the gland (12) and is partially arranged outside the housing; The sound collection column (4) is provided with collection holes (401), a cavity (1201) is provided in the gland (12), a protective cover (9) is arranged outside the microphone (3), and the protective cover (9) abuts against the base (6) to form a receiving cavity (10); A sound transmission tube (11) is provided between the receiving cavity (10) and the cavity (1201), and the collection holes (401) are communicated with the cavity (1201).

4. The vehicle-mounted microphone (3) adjustment system according to claim 3, characterized in that: The housing includes a buffer section (102), a rising section (103), a leeward section (104), and a downhill section (105) connected in sequence; The opening (101) is arranged in the leeward section (104), and a diaphragm is further arranged outside the gland (12).

5. The vehicle-mounted microphone (3) adjustment system according to claim 4, characterized in that: A connecting plate (13) is provided between the protective cover (9) and the housing. A holding seat (14) is provided on the connecting plate. A rotating cavity is formed in the holding seat (14), and a sphere (402) adapted to the rotating cavity is provided at one end of the sound collection column (4); The driving component (5) drives the sphere (402) to rotate relative to the rotating cavity.

6. The vehicle-mounted microphone (3) adjustment system according to claim 5, characterized in that: The driving assembly (5) includes a driving part (501) connected to the base (6), a driving shaft (502) provided at the power output end of the driving part (501), a gear assembly connected to the driving shaft (502), and the power output end of the gear assembly is inserted on the holding seat (14); A sliding track (1401) is provided on the holding seat (14), the driving part (501) drives the gear assembly to transmit power, and the power output end of the gear assembly slides along the sliding track (1401) to rotate the sphere (402).

7. The in-vehicle microphone (3) adjustment system according to claim 6, characterized in that: The gear assembly includes a driving shaft (503), a driving bevel gear (504) provided on the driving shaft (503), a sliding shaft (505) inserted radially along the sphere (402), and two oppositely arranged driven bevel gears (506) sleeved on the sliding shaft (505); One end of the sliding shaft (505) protrudes from the sphere (402) and is arranged in the sliding track (1401), and the other end of the sliding shaft (505) is fixed to the sphere (402) by bolts; When the driving part (501) drives the driving shaft (503) to rotate, the sliding shaft (505) slides along the sliding track (1401).

8. The in-vehicle microphone (3) adjustment system according to claim 7, characterized in that: The sliding track (1401) includes an annular section (14011) arranged radially along the sphere (402), and bending sections (14012) connected to both sides of the annular section (14011), and a transition section (14013) is provided between the bending section (14012) and the annular section (14011); When the sliding shaft (505) slides in the annular section (14011), the sound collection tube rotates, and when the sliding shaft (505) slides in the bending section (14012), the sound collection tube swings relative to the housing.

9. The in-vehicle microphone (3) adjustment system according to claim 8, characterized in that: The holding seat (14) includes a top cover (1402) and a support seat (1403), and the top cover (1402) is fixedly connected to the support seat (1403) by bolts; A first concave arc groove (14021) is formed on the top cover (1402), a second concave arc groove (14031) is provided on the support seat (1403), and the sphere (402) is arranged in the space surrounded by the first concave arc groove (14021) and the second concave arc groove (14031); The sliding track (1401) is arranged in the second concave arc groove (14031).

10. The in-vehicle microphone (3) adjustment system according to claim 9, characterized in that: A cylindrical groove (14032) is also formed on the support base (1403). The upper end of the cylindrical groove (14032) is open (101), and a protruding portion (14022) for blocking the opening (101) is provided on the top cover (1402). The second concave arc groove (14031) communicates with the bottom of the cylindrical groove (14032). The annular section (14011) is arranged on one side close to the cylindrical groove (14032), and the bent section (14012) extends downward from top to bottom.

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