CN215883552U

CN215883552U - Active noise reduction controller integrating automobile engine noise reduction and road noise reduction

Info

Publication number: CN215883552U
Application number: CN202121960629.2U
Authority: CN
Inventors: 陈卢华; 陈泽凯; 谢凯; 陈志东; 周昌水; 顾鹏云
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-02-22
Anticipated expiration: 2031-08-20

Abstract

The utility model relates to an active noise reduction controller integrating automobile engine noise reduction and road noise reduction, which comprises a main control chip (1), a CAN communication bus (10), an Ethernet (9) and four A2B buses, wherein the CAN communication bus (10), the Ethernet (9) and the four A2B buses are respectively connected with the main control chip (1), a first path (2) of the A2B bus, a second path (3) of the A2B bus and a third path (4) of the A2B bus are respectively connected with a microphone, a vibration sensor and an audio power amplifier of an automobile body, a fourth path (5) of the A2B bus is connected with other equipment of the automobile body, the external part of the Ethernet (9) is connected with vehicle-mounted Ethernet equipment or debugging equipment, and the external part of the CAN communication bus (10) is connected with a whole automobile CAN network (12). Compared with the prior art, the utility model has the advantages of reducing cost and weight, simplifying system wiring and anti-interference capability and the like.

Description

Active noise reduction controller integrating automobile engine noise reduction and road noise reduction

Technical Field

The utility model relates to an automobile electronic controller, in particular to an active noise reduction controller integrating automobile engine noise reduction and road noise reduction.

Background

With the development of the automobile industry and the improvement of the living standard of people, the requirement of consumers on the noise inside the automobile is higher and higher, and the mechanical method for processing the noise inside the automobile, such as optimizing the structure of the automobile body, adding a shock absorption and sound absorption material, using a noise reduction tire and the like, has higher cost, increased weight, prolonged development period and limited effect.

At present, a plurality of products related to active noise reduction of automobile engine noise exist in the market, however, no active noise reduction product capable of simultaneously integrating engine noise reduction and road noise reduction exists.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing an active noise reduction controller integrating noise reduction of an automobile engine with road noise reduction.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides an integrated automobile engine noise reduction and active noise reduction controller of way noise reduction, includes the main control chip, CAN communication bus, ethernet and four ways A2B bus that are connected respectively with the main control chip, the first way of A2B bus, A2B bus second way and A2B bus third way are connected with the microphone of automobile body, vibration sensor and audio power amplifier respectively, A2B bus fourth way is connected with other equipment of automobile body, the on-vehicle ethernet equipment of external connection or the debugging equipment of ethernet, the whole car CAN network of external connection of CAN communication bus.

Preferably, the microphone of the vehicle body is a microphone with an A2B bus, a plurality of microphones with an A2B bus are arranged in the cab at positions close to the ears of the human, and the A2B bus is connected with the plurality of microphones with the A2B bus outside the controller in a daisy chain manner in the first path.

Preferably, the vibration sensor of the vehicle body is a vibration sensor with an A2B bus, a plurality of vibration sensors with an A2B bus are arranged at the chassis suspension, and the A2B bus is connected with a plurality of vibration sensors with an A2B bus outside the controller in a daisy chain mode.

Preferably, the audio power amplifier of the vehicle body is an audio power amplifier with an A2B bus, and the A2B bus is connected with the audio power amplifier of the A2B bus outside the controller in a third way.

Preferably, the vibration sensor with the A2B bus adopts a three-axis acceleration sensor.

Preferably, the main control chip adopts DRA788 of TI company.

Preferably, the control chip of each A2B bus is AD2428W of ADI company.

Preferably, the chip used in the ethernet is AR8031 from Atheros corporation.

Preferably, the controller further comprises an auxiliary circuit connected with the main control chip, wherein the auxiliary circuit comprises a power supply circuit, a memory and a debugging circuit.

Preferably, the main control chip and the auxiliary circuit, the CAN communication bus, the ethernet and the control chip of the four-way A2B bus are integrated on the same main control board.

Compared with the prior art, the utility model has the following beneficial effects:

1) compared with the traditional mechanical method for processing the internal noise of the automobile, the controller is connected with the four A2B buses through the main control chip, each A2B bus is respectively provided with the microphone, the vibration sensor and the audio amplifier, the active noise reduction of engine noise reduction and road noise reduction can be realized through an integrated system, additional noise reduction materials or equipment are not needed, the cost can be reduced, the weight can be lightened, the automobile development period can be shortened, and the flexibility can be improved.

2) Compared with the traditional mode of connecting the sensor and the audio amplifier in an analog mode, the controller of the utility model adopts an A2B bus to connect various sensors and the audio power amplifier, thereby simplifying the system wiring and the anti-interference capability.

Drawings

FIG. 1 is a block diagram of an embodiment of an active noise reduction controller for integrating noise reduction with road noise reduction of an automobile engine;

the reference numbers in the figures indicate:

1. the main control chip comprises a first path of buses 2 and A2B, a second path of buses 3 and A2B, a third path of buses 4 and A2B, a fourth path of buses 5 and A2B, a microphone with the bus A2B, a vibration sensor with the bus A2B, an audio power amplifier with the bus A2B, 9, Ethernet, 10, a CAN communication bus, 11, vehicle-mounted Ethernet/debugging equipment, 12, a whole vehicle CAN network, 13 and an auxiliary circuit.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Examples

The utility model relates to an active noise reduction controller integrating automobile engine noise reduction and road noise reduction, which can simultaneously realize the functions of automobile engine noise reduction and road noise reduction. The noise reduction mode is adopted for active noise reduction, namely the controller is utilized to control a loudspeaker in the automobile to emit sound waves opposite to the noise source so as to reduce the noise. The engine noise refers to noise transmitted into a vehicle when the engine runs; road noise refers to noise that is transmitted into a vehicle through tires when the vehicle moves on a road.

The active noise reduction controller integrating the automobile engine noise reduction and the road noise reduction comprises a main control chip 1, an Ethernet 9, a CAN communication bus 10, an auxiliary circuit 13 and a 4-way A2B bus. As shown in fig. 1, the main control chip 1 is connected to the auxiliary circuit 13, the CAN communication bus 10, the ethernet 9 and the control chip of the 4-way A2B bus, respectively, and integrated on the same main control board.

The A2B bus first path 2 connects the microphone 6 of the A2B bus outside the controller. A plurality of microphones 6 with A2B bus may be connected in a daisy chain fashion. The microphone 6 with the A2B bus is placed in the cab as close to the ear as possible as a feedback signal for the entire control loop. The microphone with the A2B bus is used for simulating human ears and is generally arranged at the ceilings of the front seat and the rear seat in the vehicle, and preferably, 2 or 4 microphones are respectively arranged at the top of the front seat, and 2 or 4 microphones are also arranged at the top of the rear seat.

The second bus 3 of the A2B is connected outside the controller to the vibration sensor 7 of the A2B bus. A plurality of vibration sensors 7 with A2B bus may be daisy-chained (typically 4, i.e. one vibration sensor per wheel suspension). The vibration sensor 7 with the A2B bus is disposed in the chassis suspension as a main input signal for road noise reduction control. The vibration sensor 7 with the A2B bus actually employs a three-axis acceleration sensor (i.e., one sensor simultaneously measures accelerations in three directions XYZ).

The A2B bus third path 4 connects the audio power amplifier 8 of the A2B bus to the outside of the controller. The audio power amplifier 8 with bus A2B is used to control the vehicle speakers, and the audio power amplifier 8 with bus A2B is the common output of the engine noise reduction and road noise reduction functions.

The fourth bus 5 of the A2B is reserved A2B bus, which can be connected with more sensors with A2B or car machine or other devices outside the controller.

The outside of the ethernet 9 may be connected to a vehicle-mounted ethernet device, for example, to communicate with a vehicle machine; or a debugging device is connected, so that the parameters of the controller can be adjusted, the performance can be optimized, the data can be monitored, and the like.

The outside of the CAN communication bus 10 is connected with a whole vehicle CAN network 12, and the working condition of an engine, the opening condition of a vehicle window and a vehicle door and the like CAN be acquired. These signals serve as the primary input signals for engine noise reduction.

The auxiliary circuit 13 of the controller of the present invention includes a power supply, a memory, a debugging circuit, and the like.

In this embodiment, as a preferable scheme, the main control chip 1 adopts DRA788 of TI corporation, which is a multi-core automobile-level chip with DSP and ARM. The controller only uses one main control chip, and all programs run on the chip. The control chip of each A2B bus adopts AD2428W of ADI company. Ethernet 9, chip AR8031 from Atheros corporation is used.

A2B (Automotive Audio Bus) is a trademark of ADI corporation (Analog Devices, Inc.). Compared with other communication buses, the A2B has the characteristics of simple connection and low communication delay, and is very suitable for active noise reduction of automobiles.

The controller of the present invention is used for engine noise reduction and road noise reduction functions, and the control process is briefly described below.

And (3) reducing the noise of the engine:

the main control chip 1 calculates a reverse sound wave signal according to the working condition of the engine (acquired through the whole vehicle CAN network 12) and the microphone signal (acquired through the first path 2 of the A2B bus), and then controls the loudspeaker to sound (controlled through the third path 4 of the A2B bus). The working condition of the engine is a main input signal, the microphone signal is a feedback signal, and the opening condition of the vehicle window and the vehicle door (acquired through the whole vehicle CAN network 12) and the like are referred. The main control chip 1 can calculate the reverse sound wave signal by adopting the existing automobile active noise reduction technology or synthesizing a simulated noise source signal according to an engine rotating speed signal, and the two modes are only exemplary embodiments.

And (3) reducing the road noise:

the main control chip 1 calculates an inverse sound wave signal according to the vibration sensor signal (acquired through the second path 3 of the A2B bus) and the microphone signal (acquired through the first path 2 of the A2B bus), and then controls the speaker to sound (controlled through the third path 4 of the A2B bus). The vibration sensor signal is a main input signal, the microphone signal is a feedback signal, and the opening conditions of the vehicle window and the vehicle door (acquired through a vehicle CAN network) and the like are referred. The main control chip 1 calculates the reverse sound wave signal for the road noise reduction function by processing the signal collected by the vibration sensor through the transfer function of the conduction path in the prior art, and then performing feedback comparison with the in-vehicle sound wave signal collected by the microphone to generate an audio signal for the road noise reduction function.

Compared with the traditional mechanical method for processing the internal noise of the automobile, the controller is connected with the four A2B buses through the main control chip, each A2B bus is respectively provided with the microphone, the vibration sensor and the audio amplifier, the active noise reduction of engine noise reduction and road noise reduction can be realized through an integrated system, additional noise reduction materials or equipment are not needed, the cost can be reduced, the weight can be lightened, the automobile development period can be shortened, and the flexibility can be improved. Compared with the traditional mode of connecting the sensor and the audio amplifier in an analog mode, the controller of the utility model adopts an A2B bus to connect various sensors and the audio power amplifier, thereby simplifying the system wiring and the anti-interference capability.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an integrated automobile engine noise reduction and road noise reduction's active noise reduction controller, its characterized in that, including main control chip (1), CAN communication bus (10), ethernet (9) and four ways A2B bus that are connected respectively with main control chip (1), the first way (2) of A2B bus, A2B bus second way (3) and A2B bus third way (4) are connected with the microphone of automobile body, vibration sensor and audio power amplifier respectively, A2B bus fourth way (5) are connected with other equipment of automobile body, the on-vehicle ethernet equipment of external connection or the debugging equipment of ethernet (9), the whole car CAN network (12) of external connection of CAN communication bus (10).

2. The active noise reduction controller integrating automobile engine noise reduction and road noise reduction according to claim 1, wherein the microphone of the automobile body is a microphone (6) with A2B bus, a plurality of microphones (6) with A2B bus are provided in the cab at positions close to the human ear, and the A2B bus first road (2) is connected with a plurality of microphones (6) with A2B bus outside the controller in a daisy chain manner.

3. The active noise reduction controller integrating automobile engine noise reduction and road noise reduction according to claim 1, wherein the vibration sensor of the automobile body is a vibration sensor (7) with A2B bus, a plurality of vibration sensors (7) with A2B bus are provided at the chassis suspension, and the second road (3) of the A2B bus is connected with a plurality of vibration sensors (7) with A2B bus outside the controller in a daisy chain manner.

4. The active noise reduction controller integrating automobile engine noise reduction and road noise reduction according to claim 1, wherein the audio power amplifier of the automobile body is an audio power amplifier (8) with a bus A2B, and the third bus A2B (4) is connected with the audio power amplifier (8) with a bus A2B outside the controller.

5. The active noise reduction controller integrating automobile engine noise reduction with road noise reduction according to claim 3, characterized in that the vibration sensor (7) with a bus of A2B employs a three-axis acceleration sensor.

6. The active noise reduction controller integrating automobile engine noise reduction and road noise reduction according to claim 1, wherein the main control chip (1) adopts DRA788 of TI company.

7. The active noise reduction controller for integrating noise reduction of automobile engines and road noise reduction according to claim 1, wherein the control chip of each A2B bus is AD2428W of ADI company.

8. The active noise reduction controller for integrated automotive engine noise reduction and road noise reduction according to claim 1, characterized in that the chip adopted by the ethernet (9) is AR8031 from Atheros.

9. The active noise reduction controller for integrating noise reduction of an automobile engine with road noise reduction according to claim 1, further comprising an auxiliary circuit (13) connected to the main control chip (1), wherein the auxiliary circuit (13) comprises a power circuit, a memory and a debugging circuit.

10. The active noise reduction controller for integrating noise reduction of automobile engine with road noise reduction according to claim 9, wherein the main control chip (1) is integrated with the auxiliary circuit (13), the CAN communication bus (10), the ethernet (9) and the control chip of the four-way A2B bus on the same main control board.