CN213366129U - Acoustic device of making an uproar falls in car based on-vehicle ethernet - Google Patents
Acoustic device of making an uproar falls in car based on-vehicle ethernet Download PDFInfo
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- CN213366129U CN213366129U CN202022528213.5U CN202022528213U CN213366129U CN 213366129 U CN213366129 U CN 213366129U CN 202022528213 U CN202022528213 U CN 202022528213U CN 213366129 U CN213366129 U CN 213366129U
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Abstract
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, include: the digital microphone assembly, a plurality of loudspeaker assemblies, the sensor assembly, the vehicle-mounted central control host computer, the vehicle-mounted Ethernet gateway, wherein, the vehicle-mounted central control host computer, the audio frequency regulation control equipment, the digital array type microphone assembly are respectively connected with the vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet bus, the loudspeaker assembly is connected with the audio frequency regulation control equipment through a hard wire, wherein, the audio frequency regulation control equipment generates corresponding noise-eliminating waveform signals according to signals transmitted by the digital microphone assembly and the sensor assembly forwarded by the vehicle-mounted Ethernet gateway, and the noise-eliminating waveform signals are amplified and then output through the loudspeaker assembly. Through adopting digital array microphone and digital array microphone adopt on-vehicle ethernet transmission signal, compare the tradition and adopt the mode of hard line or A2B line, can reduce the time delay, improve noise reduction effect.
Description
Technical Field
The utility model relates to an automobile acoustics field especially relates to an acoustics device of making an uproar falls in car based on-vehicle ethernet.
Background
With the continuous development of communication technology, the technical development and application of video entertainment become more mature and extensive. The automobile develops towards intellectualization and individuation, and the requirements of drivers and passengers on sound systems are higher and higher. In order to improve the comfort and safety of vehicle driving, the influence of vehicle noise on drivers and passengers needs to be reduced, most of the methods for reducing the noise in the vehicle in the prior art are used for passively reducing the noise of the vehicle by physically separating and reducing the energy of a noise source, and although the methods have certain effects, the noise of the noise source cannot be obviously reduced due to limited technology. In order to further provide noise reduction effect, a few high-end vehicles such as Cadillac, Oncorwei and the like in the market at present adopt an active noise reduction mode, and noise in a cockpit is eliminated through sound production of an in-vehicle sound system. However, the noise reduction effect of the noise reduction method is not ideal, and the microphone collected noise is transmitted to the control board card by using a hard wire to generate a large delay, so that the difference between the sound wave generated by the algorithm and the current noise sound wave exists, and the noise is increased when the difference is serious. Therefore, how to provide an automobile with an active noise reduction system for an automobile, which can effectively improve the effect of actively reducing noise, has become a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet to expect can reduce the noise in the car, specifically speaking
An in-vehicle noise reduction acoustic device based on vehicle-mounted Ethernet comprises: a digital microphone component, a plurality of loudspeaker components, a sensor component, a vehicle-mounted central control host and a vehicle-mounted Ethernet gateway, wherein the sensor component is connected with the vehicle-mounted central control through a CAN bus, the vehicle-mounted central control host, an audio regulation control device and a digital array type microphone component are respectively connected with the vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet bus, the loudspeaker component is connected with the audio regulation control device through a hard wire, wherein,
the audio regulation control equipment generates corresponding noise-eliminating waveform signals according to signals transmitted by the digital microphone assembly and the sensor assembly forwarded by the vehicle-mounted Ethernet gateway, and the noise-eliminating waveform signals are amplified and then output through the loudspeaker assembly.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, further, digital microphone subassembly includes a plurality of array digital microphones, installs respectively in car left front door, right front door, left back door, right back door, roof front, roof middle part, roof rear.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, further, a plurality of speaker subassemblies include a plurality of speakers, install respectively in car left front door, right front door, left back door, right back door, rear of a vehicle.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, further, the sensor package includes tacho sensor, speedtransmitter, acceleration sensor at least, and tacho sensor installs on the transmitter engine, and speedtransmitter installs on front and back axletree, and acceleration sensor places in the tire inboard.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, furtherly, audio frequency regulation controlgear includes on-vehicle ethernet PHY chip, data buffer, audio frequency regulation DSP, operation DSP, and wherein, MCU controls operation DSP, audio frequency regulation DSP according to the demand, and MCU invokes built-in algorithm in the operation DSP and carries out the operation with the signal of coming from sensor subassembly and digital microphone subassembly after exporting the result to audio frequency regulation DSP treater and carry out frequency modulation processing.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, furtherly, audio frequency regulation controlgear still includes digital analog converter, power amplifier, MCU control audio frequency regulation DSP exports the signal after the frequency modulation to digital analog converter and carries out after converting digital signal into analog signal, exports analog signal to power amplifier again and exports loudspeaker assembly after amplifying.
The in-vehicle noise reduction acoustic device based on the vehicle-mounted Ethernet further comprises transmission protocols adopted by a vehicle-mounted Ethernet bus, wherein the transmission protocols comprise an SOME/IP protocol, an SOME/IP-SD protocol and an AVB protocol, control signals or state signals are transmitted by the SOME/IP protocol and the SOME/IP-SD protocol, and noise collection data are transmitted by an AVB protocol stack.
An acoustic device of making an uproar falls in car based on-vehicle ethernet further, digital array microphone subassembly collection signal adopts the protocol based on time trigger to carry out signal transmission.
The utility model provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, further still includes the human-computer interaction module, and the human-computer interaction module is connected with on-vehicle well accuse host computer, and the human-computer interaction module includes one of touch-sensitive screen, microphone.
An in-vehicle noise reduction acoustic device based on vehicle-mounted Ethernet is characterized in that a power amplifier comprises a ClassAB or ClassD amplifier.
Has the advantages that: the utility model provides an in-vehicle noise reduction system based on-vehicle ethernet framework is through adopting digital array microphone and digital array microphone adopts on-vehicle ethernet transmission signal, compares the tradition and adopts the mode of hardwire or A2B line, can reduce the time delay for the processing result of noise collection is more accurate, can generate the noise elimination wave form of more matching, further improves the noise reduction effect.
Drawings
Other features, objects, and advantages of the invention will become more apparent upon reading the attached drawings in reference to embodiments of the invention:
fig. 1 is a schematic diagram of a structure of an in-vehicle noise reduction acoustic device of an embodiment of the present invention.
Fig. 2 is a schematic view of an installation position structure of the sensor assembly, the speaker assembly and the digital array microphone assembly according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an audio frequency adjustment control device according to an embodiment of the present invention.
Detailed Description
The present invention will be described with reference to fig. 1 to 3, and the present invention is based on an in-vehicle noise reduction acoustic device of an ethernet. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way; it should be noted that, for those skilled in the art, many variations and modifications may be made without departing from the spirit of the invention; these all belong to the protection scope of the present invention.
This implementation provides an acoustic device of making an uproar falls in car based on-vehicle ethernet, refers to fig. 1, specifically includes: the digital microphone assembly, the loudspeaker assemblies, the sensor assembly, the vehicle-mounted central control host and the vehicle-mounted Ethernet gateway, wherein the vehicle-mounted central control host, the audio regulation control equipment and the digital array type microphone assembly are respectively connected with the vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet bus, the sensor assembly is connected with the vehicle-mounted Ethernet gateway through a CAN bus, and the loudspeaker assembly is connected with the audio regulation control equipment through a hard wire;
the vehicle-mounted Ethernet gateway comprises a CAN interface chip, a vehicle-mounted Ethernet interface chip and a protocol conversion module, wherein the protocol conversion module is used for converting a signal of a CAN protocol into a signal transmitted by the vehicle-mounted Ethernet;
specifically, the digital array type microphone assembly collects engine noise and wheel noise and then transmits the engine noise and the wheel noise to the vehicle-mounted Ethernet gateway through the vehicle-mounted Ethernet, the sensor assembly collects signals of engine speed signals, wheel acceleration signals and vehicle speed signals and then transmits the signals to the vehicle-mounted Ethernet gateway through the CAN bus, the vehicle-mounted Ethernet gateway forwards the received signals to the audio adjusting and controlling device, the audio adjusting and controlling device generates corresponding noise eliminating waveform signals according to the signals transmitted by the digital microphone assembly and the sensor assembly forwarded by the vehicle-mounted Ethernet gateway, the noise eliminating waveform signals are amplified and then output to the loudspeaker assembly to be identical with noise amplitude, and the noise eliminating signals with opposite phases are output to the loudspeaker assembly to send sound waves to be eliminated with noise.
The digital microphone assembly comprises a plurality of array digital microphones which are respectively arranged on a left front door, a right front door, a left rear door, a right rear door, the front part of the roof, the middle part of the roof and the rear part of the roof in the vehicle.
The digital signal output by the digital microphone is transmitted through a protocol (TSN) of the vehicle-mounted Ethernet based on a time sensitive network, and the digital signal output by the digital microphone is transmitted through a time-triggered protocol, so that low delay can be ensured, and the delay of the digital microphone for acquiring signal noise and transmitting the signal noise to a vehicle-mounted Ethernet gateway can reach millisecond level.
In order to achieve a better effect, the three digital array microphones in front of the roof, in the middle of the roof and behind the roof are arranged on the roof and are respectively positioned in front of the roof, in the middle of the roof and behind the roof for correcting the error correction microphones.
The noise signals are collected through the digital microphones, and the accurate noise position and the accurate noise waveform precision can be obtained.
The plurality of loudspeaker assemblies comprise a plurality of loudspeakers which are respectively arranged on a left front door, a right front door, a left rear door, a right rear door and a vehicle tail in the vehicle, and the loudspeakers can be micro loudspeakers and directional loudspeakers.
The loudspeaker outputs the same amplitude matched with the noise waveform and cancels the waveform with the opposite phase with the noise waveform according to the received signal from the power amplifier, thereby achieving the purpose of noise elimination.
The sensor assembly at least comprises a rotating speed sensor, a speed sensor and an acceleration sensor, wherein the rotating speed sensor is arranged on the engine of the transmitter, the speed sensor is arranged on the front axle and the rear axle, and the acceleration sensor is arranged on the inner side of the tire;
the method comprises the steps that a rotating speed sensor acquires an engine rotating speed signal, the transmitted rotating speed signal is closely related to engine noise, and a related noise waveform of the engine noise is established according to the rotating speed signal of a transmitter in the prior art;
the speed sensor and the acceleration sensor are closely related to tire noise, and the generated noise waveform can be predicted by collecting data.
The audio regulation control equipment comprises a vehicle-mounted Ethernet PHY chip, a data buffer area, an audio regulation DSP and an operation DSP, wherein the operation DSP and the audio regulation DSP are controlled by the MCU according to requirements, and the MCU invokes a built-in algorithm in the operation DSP to operate signals from the sensor assembly and the digital microphone assembly and then outputs the result to the audio regulation DSP processor for frequency modulation processing;
the implementation adopts two DSP processors, the audio adjusting DSP is used for audio adjustment, the operation DSP is specially used for processing signals transmitted by the sensor assembly, and corresponding noise waveforms are generated through the signals.
Specifically, the vehicle-mounted Ethernet protocol signals forwarded by the vehicle-mounted Ethernet gateway are received by the vehicle-mounted Ethernet PHY and then stored in the data buffer area, the MCU sends the signals transmitted by the sensor assembly to the operation DSP according to requirements to process and generate corresponding noise waveforms and then output the noise waveforms to the audio adjusting DSP, the MCU directly inputs the signals transmitted by the digital microphone assembly into the audio adjusting DSP, and the audio adjusting DSP synthesizes and adjusts the received signals and then outputs the signals.
The digital array type microphone assembly collects signals and transmits the signals by adopting a protocol based on time triggering.
The power amplifier comprises a class classa or ClassD amplifier.
The in-vehicle noise reduction acoustic device also comprises a human-computer interaction input module, wherein the human-computer interaction input module comprises one or more of an array microphone, a touch screen and a button, and a user controls the in-vehicle noise reduction acoustic device through the human-computer interaction input module.
The real-time performance of noise collection can be met through high-speed vehicle-mounted Ethernet transmission, and delay is reduced.
The transmission protocols adopted by the vehicle-mounted Ethernet bus comprise an SOME/IP protocol, an SOME/IP-SD protocol and an AVB protocol, wherein control signals or state signals are transmitted by the SOME/IP protocol and the SOME/IP-SD protocol, and noise collection data are transmitted by an AVB protocol stack.
The AVB protocol stack includes: IEEE802.1AS, IEEE802.1Qav, IEEE802.1Qat, IEEE802.1BA, IEEE1722 and IEEE1722.1 protocols adopt AVB protocol stack to make multimedia data transmission reach real-time and synchronous requirements.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. An in-vehicle noise reduction acoustic device based on vehicle-mounted Ethernet, comprising: a digital microphone component, a plurality of loudspeaker components, a sensor component, a vehicle-mounted central control host and a vehicle-mounted Ethernet gateway, wherein the sensor component is connected with the vehicle-mounted central control host through a CAN bus, the vehicle-mounted central control host, an audio regulation control device and a digital array type microphone component are respectively connected with the vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet bus, the loudspeaker component is connected with the audio regulation control device through a hard wire, wherein,
the audio regulation control equipment generates corresponding noise-eliminating waveform signals according to signals transmitted by the digital microphone assembly and the sensor assembly forwarded by the vehicle-mounted Ethernet gateway, and the noise-eliminating waveform signals are amplified and then output through the loudspeaker assembly.
2. The on-board ethernet-based in-vehicle noise reduction acoustic device according to claim 1, wherein the digital microphone assembly comprises a plurality of array-type digital microphones respectively installed at a left front door, a right front door, a left rear door, a right rear door, a front roof, a middle roof and a rear roof of the in-vehicle.
3. The on-board ethernet-based in-vehicle noise reduction acoustic device according to claim 1, wherein the plurality of speaker assemblies comprise a plurality of speakers respectively mounted in a left front door, a right front door, a left rear door, a right rear door, and a rear of a vehicle.
4. The on-board ethernet based acoustic device for vehicle interior noise reduction according to claim 1, wherein said sensor assembly comprises at least a rotation speed sensor, a speed sensor and an acceleration sensor, wherein the rotation speed sensor is mounted on the engine of the transmitter, the speed sensor is mounted on the front and rear axle, and the acceleration sensor is disposed inside the tire.
5. The in-vehicle noise reduction acoustic device based on the vehicle-mounted Ethernet as claimed in claim 1, wherein the audio regulation control device comprises a vehicle-mounted Ethernet PHY chip, a data buffer area, an audio regulation DSP and an operation DSP, wherein the operation DSP and the audio regulation DSP are controlled by the MCU according to requirements, and the MCU invokes a built-in algorithm in the operation DSP to operate signals from the sensor assembly and the digital microphone assembly and then outputs the result to the audio regulation DSP processor for frequency modulation processing.
6. The in-vehicle noise reduction acoustic device based on the vehicle-mounted Ethernet of claim 5, wherein the audio regulation control device further comprises a digital-to-analog converter and a power amplifier, and the MCU controls the audio regulation DSP to output the frequency-modulated signal to the digital-to-analog converter to convert a digital signal into an analog signal, and then outputs the analog signal to the power amplifier to be amplified and then output to the speaker assembly.
7. The in-vehicle noise reduction acoustic device based on the vehicle-mounted Ethernet of claim 1, wherein the transmission protocols adopted by the vehicle-mounted Ethernet bus comprise an SOME/IP protocol, an SOME/IP-SD protocol and an AVB protocol, wherein the control signal or the status signal is transmitted by the SOME/IP protocol or the SOME/IP-SD protocol, and the noise collection data is transmitted by an AVB protocol stack.
8. The in-vehicle noise reduction acoustic device based on the vehicular ethernet of claim 7, wherein the digital array type microphone assembly collects signals and transmits the signals by adopting a time trigger based protocol.
9. The in-vehicle noise reduction acoustic device based on the vehicle-mounted Ethernet of claim 1, further comprising a human-computer interaction module, wherein the human-computer interaction module is connected with the in-vehicle central control host, and the human-computer interaction module comprises one of a touch screen and a microphone.
10. The on-board ethernet based acoustic device for vehicle noise reduction according to claim 5, wherein the power amplifier comprises a class classa or class ClassD amplifier.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113724682A (en) * | 2021-09-10 | 2021-11-30 | 朝阳聚声泰（信丰）科技有限公司 | Automobile noise reduction structure and noise reduction method |
| CN115206279A (en) * | 2022-07-06 | 2022-10-18 | 中国第一汽车股份有限公司 | Vehicle noise reduction processing system and method and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113724682A (en) * | 2021-09-10 | 2021-11-30 | 朝阳聚声泰（信丰）科技有限公司 | Automobile noise reduction structure and noise reduction method |
| CN115206279A (en) * | 2022-07-06 | 2022-10-18 | 中国第一汽车股份有限公司 | Vehicle noise reduction processing system and method and vehicle |
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