Multi-source active noise reduction system based on vehicle machine domain control integration and whole vehicle

Abstract

The invention belongs to the technical field of new energy vehicle active noise reduction systems and whole vehicle application thereof, and particularly relates to a multi-source active noise reduction system based on vehicle domain control integration and a whole vehicle. The multi-source active noise reduction system comprises a whole vehicle domain controller, a power amplifier and a vibration acceleration signal arranged on a vehicle body or a chassis; the whole vehicle domain controller is provided with a domain control A2B signal receiver and an SOC built-in DSPs, and the domain control A2B signal receiver is connected with the vibration acceleration signal and the SOC built-in DSPs; the whole vehicle domain controller is provided with a microphone signal, and the microphone signal is connected with the SOC built-in DSPs and the domain control A2B signal receiver. Different noise sources (such as road noise, engine noise, air conditioner noise and the like) are subjected to noise reduction in a unified scheme, in order to reduce system delay, input signals required by noise reduction are directly connected into a vehicle machine domain controller, and the system has the advantages of multi-source noise reduction, low cost, low delay and capability of giving consideration to different audio configurations.

Description

Technical Field

[0001] The present invention relates to the technical field of active noise reduction system for new energy vehicles and whole vehicle application thereof, and specifically to a multi-source active noise reduction system and a whole vehicle based on vehicle-computer domain control integration. Background Art

[0002] Due to the cancellation of the internal combustion engine power system or the reduction of usage scenarios of new energy vehicles, the non-internal combustion engine noise in the car has become very significant. For example, there will be low-frequency body structure noise caused by tires, noise from the thermal management system, and low-frequency noise under high-speed wind excitation in the car. Some noises may even cause discomfort in the ear pressure of the human ear, or physical reactions such as motion sickness and vomiting, greatly affecting the user's riding comfort. In order to avoid these problems, automobile manufacturers often adopt passive technical solutions such as strengthening the body structure, adding acoustic packages, and adding dynamic vibration absorbers to the chassis. However, due to physical limitations such as space and weight, these noise problems cannot be cured at a high cost. In this context, some OEMs have begun to use active noise reduction technology to suppress the above noise. By picking up the acceleration sensor signals of the chassis or body of the vehicle, the signal pickup of the microphone of the vehicle, the noise reduction output signal calculation is completed in the DSP, and the reverse sound waves are output through different speakers of the vehicle to control the sound field of each driving position in the car. The current technical solutions generally adopt the solutions of power amplifier integration or separate controller integration. The system cost is very expensive, the signal multiplexing is poor, the signal delay is high, and it cannot meet the feasibility of real large-scale mass production. Therefore, a multi-source active noise reduction system and a whole vehicle based on vehicle-machine domain control integration are invented. Summary of the invention

[0003] In view of the above and / or existing problems in the existing multi-source active noise reduction system based on vehicle-computer domain control integration and the whole vehicle, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide a multi-source active noise reduction system and a whole vehicle based on vehicle-computer domain control integration, which can solve the above-mentioned existing problems.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A multi-source active noise reduction system based on vehicle domain control integration includes a vehicle domain controller, a power amplifier and a vibration acceleration signal arranged on a vehicle body or chassis, wherein the vehicle domain controller is provided with a domain control A2B signal receiver and a SOC built-in DSPs, and the domain control A2B signal receiver is connected to the vibration acceleration signal and the SOC built-in DSPs; the vehicle domain controller is provided with a microphone signal, and the microphone signal is connected to the SOC built-in DSPs and the domain control A2B signal receiver; the vehicle domain controller is provided with an ADC converter, and the ADC converter is connected to the microphone signal and the SOC built-in DSPs; the vehicle domain controller is provided with a CAN signal, and the CAN signal is connected to the SOC built-in DSPs; the vehicle domain controller is provided with an MCU, and the MCU is connected to the SOC built-in DSPs; the vehicle domain controller is provided with a noise reduction algorithm, and the noise reduction algorithm is connected to the MCU.

[0007] As a preferred solution of the multi-source active noise reduction system based on vehicle domain control integration described in the present invention, wherein: the power amplifier is provided with a power amplifier A2B signal receiver, and the uplink channel of the power amplifier A2B signal receiver is connected to the domain control A2B signal receiver.

[0008] As a preferred solution of the multi-source active noise reduction system based on vehicle domain control integration described in the present invention, wherein: the vehicle domain controller is provided with a noise reduction signal and a sound effect signal mixer, and the noise reduction signal and the sound effect signal mixer are connected to the noise reduction algorithm and the power amplifier.

[0009] As a preferred solution of the multi-source active noise reduction system based on vehicle domain controller integration described in the present invention, wherein: the vehicle domain controller is provided with fault diagnosis information, and the fault diagnosis information is connected with the noise reduction algorithm.

[0010] As a preferred solution of the multi-source active noise reduction system based on vehicle domain controller integration described in the present invention, one end of the power amplifier is connected to the cabin speaker, and the vehicle domain controller is provided with a SOC.

[0011] As a preferred solution of the multi-source active noise reduction system based on vehicle domain controller integration described in the present invention, wherein: the vehicle domain controller is provided with noise reduction algorithm calibration data, and the noise reduction algorithm calibration data is connected with the noise reduction algorithm.

[0012] The whole vehicle includes the above-mentioned multi-source active noise reduction system based on vehicle-computer domain control integration.

[0013] Compared with existing technologies:

[0014] By implementing a unified noise reduction scheme for different noise sources (such as road noise, engine noise, air conditioning noise, etc.), and in order to reduce system latency, the input signal required for noise reduction is directly connected to the vehicle domain control, the present invention has the advantages of multi-source noise reduction, low cost, low latency, and can take into account different audio configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the present invention;

[0016] Figure 2 This is a schematic diagram of the second principle of the present invention;

[0017] Figure 3 This is a diagram showing the noise reduction effect of the front and rear rows at 40 kph on a rough road according to the present invention.

[0018] In the figure: SOC1, vehicle domain controller2, microphone signal3, ADC converter4, vibration acceleration signal5, power amplifier6, cabin speaker7, power amplifier A2B signal receiver8, domain control A2B signal receiver9, noise reduction signal and sound effect signal mixing10, noise reduction algorithm11, SOC built-in DSPs12, noise reduction algorithm calibration data13, MCU14, fault diagnosis information15, CAN signal16. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] The present invention provides a multi-source active noise reduction system based on vehicle domain control integration, please refer to Figure 1-Figure 3, including a vehicle domain controller 2, a power amplifier 6 and a vibration acceleration signal 5 arranged on the vehicle body or chassis, the vehicle domain controller 2 is provided with a domain control A2B signal receiver 9 and a SOC built-in DSPs12, and the domain control A2B signal receiver 9 is connected to the vibration acceleration signal 5 and the SOC built-in DSPs12; the vehicle domain controller 2 is provided with a microphone signal 3, and the microphone signal 3 is connected to the SOC built-in DSPs12 and the domain control A2B signal receiver 9; the vehicle domain controller 2 is provided with an ADC converter 4, and the ADC converter 4 is connected to the microphone signal 3 and the SOC built-in DSPs12; the vehicle domain controller 2 is provided with a CAN signal 16, and the CAN signal 16 is connected to the SOC built-in DSPs12; the vehicle domain controller 2 is provided with an MCU14, and MCU14 It is connected to the SOC built-in DSPs 12; the vehicle domain controller 2 is provided with a noise reduction algorithm 11, and the noise reduction algorithm 11 is connected to the MCU14; the power amplifier 6 is provided with a power amplifier A2B signal receiver 8, and the uplink channel of the power amplifier A2B signal receiver 8 is connected to the domain control A2B signal receiver 9; the vehicle domain controller 2 is provided with a noise reduction signal and sound effect signal mixer 10, and the noise reduction signal and sound effect signal mixer 10 is connected to the noise reduction algorithm 11 and the power amplifier 6; the vehicle domain controller 2 is provided with fault diagnosis information 15, and the fault diagnosis information 15 is connected to the noise reduction algorithm 11; one end of the power amplifier 6 is connected to the cockpit speaker 7, and the vehicle domain controller 2 is provided with SOC1; the vehicle domain controller 2 is provided with noise reduction algorithm calibration data 13, and the noise reduction algorithm calibration data 13 is connected to the noise reduction algorithm 11.

[0021] The whole vehicle includes the above-mentioned multi-source active noise reduction system based on vehicle-computer domain control integration.

[0022] When used, the specific steps are as follows:

[0023] The present invention integrates the active noise reduction function into the existing DSP (such as SOCmDSP, aDSP, etc.) inside the cockpit domain controller chip. In order to reduce system delay, all active noise reduction input and output functions directly enter the SOC DSP. After the noise reduction algorithm is calculated, the noise reduction audio signal is output.

[0024] For the configuration of the power amplifier only for power amplification, the active noise reduction algorithm and mixing are all performed in the domain control. The system principle is as follows Figure 1 For the configuration where the sound effects are processed in the power amplifier, the active noise reduction algorithm is still executed in the domain controller, and the mixing must be done in the power amplifier. The system principle is as follows Figure 2 shown.

[0025] The basic principles are:

[0026] S1: The vibration acceleration signal 5 arranged on the vehicle body or chassis, in one form: enters the SOC built-in DSPs 12 through the domain control A2B signal receiver 9 on the vehicle domain controller 2. Another form: is sent to the domain control A2B signal receiver 9 through the uplink channel of the power amplifier A2B signal receiver 8 of the power amplifier 6, and then enters the SOC built-in DSPs 12;

[0027] S2: The noise signal in the vehicle is transmitted to the SOC built-in DSPs12 in the domain control through the original vehicle microphone signal 3; if the original vehicle microphone is an analog signal, it can be converted into a digital signal using the domain control ADC converter 4 and then enter the SOC built-in DSPs12. If the original vehicle microphone is a digital signal, it can enter the SOC built-in DSPs12 through the domain control A2B signal receiver 9 and participate in the calculation of the active noise reduction algorithm;

[0028] S31: System solution for sound effect processing in the domain controller: After the built-in DSPs 12 of the SOC receives the microphone signal 3, the vibration acceleration signal 5 and the CAN signal 16, and after the signal configuration through the MCU 14, it will enter the noise reduction algorithm 11 for calculation, and after obtaining the noise reduction output signal, it will use the noise reduction signal and the sound effect signal mixer 10 for mixing, and then it will be sent to the power amplifier 6 together. At the same time, if there is a fault during the operation of the noise reduction algorithm, the fault diagnosis information will be output through the fault diagnosis information 15;

[0029] S32: System solution for processing sound effects in the power amplifier: After the built-in DSPs 12 of the SOC receives the microphone signal 3, the vibration acceleration signal 5 and the CAN signal 16, and after the signal configuration through the MCU 14, it will enter the noise reduction algorithm 11 for calculation to obtain the noise reduction output signal, at which time, it will be sent to the power amplifier 6 through the noise reduction dedicated channel, so as to mix the noise reduction signal with the sound effect signal 10 in the power amplifier 6. At the same time, if there is a fault during the operation of the noise reduction algorithm, the fault diagnosis information will be output through the fault diagnosis information 15;

[0030] S4: After the power amplifier 6 receives the mixed signal, it will use the power amplifier chip (Class AB, Class D, etc.) to play it in the original car's cabin speaker 7, which will not affect the original car voice sound effects and can ensure the real-time noise reduction function.

[0031] Based on the above, the present invention mainly reuses the original signal of the vehicle computer, completes the signal input, calculation, and output in the vehicle computer controller, greatly optimizes the latency and system stability, and controls the system cost to the greatest extent. Effective real-time noise reduction can be achieved for low-frequency vibrations caused by road vibration excitation, hybrid powertrain vibration excitation, thermal management system vibration excitation, and wind excitation. The domain control integration solution of this active control technology greatly optimizes the cost and weight increase brought by the passive noise reduction solution of traditional vehicle NVH, can take into account both high and low audio configuration models, and also avoids the expensive cost solution of the current active noise reduction system.

[0032] In addition, the advantages of the present invention are:

[0033] The domain control integration solution uses the shortest link to obtain acceleration signals, microphone signals, vehicle CAN signals, and subsystem input signals (such as engine subsystems, air conditioning subsystems, etc.), and realizes the rapid calculation of noise reduction algorithms in a single DSP, avoiding the delay increased by signal interaction of multiple DSPs. At the same time, the system is applicable to audio processing in vehicle domain control and power amplifier processing at the same time, so the system improves the real-time performance, low latency, and robustness of the algorithm, and the noise reduction effect can be seen Figure 3 .

[0034] Different from the power amplifier integration or external separate controller integration solution - the access of microphone signals requires the re-arrangement of dedicated microphones, and the original vehicle voice microphone and A2B wiring harness cannot be reused, which greatly increases the hardware cost.

[0035] The multi-source active noise reduction system integrated in the vehicle domain control is part of the smart cockpit domain. This can effectively make the reverse sound waves of noise reduction work together with the audio. Not only do they not interfere with each other, but they can also enhance usage scenarios such as voice and sound effects, and improve the user's perception of sound.

[0036] In terms of algorithm logic judgment, since the domain control MCU uniformly initiates various logic demand signals, it can better configure the real-time vehicle demand signals and provide them to the DSP noise reduction algorithm. It can not only transmit the vehicle signals synchronously and efficiently, but also greatly save signal management and collaborative development costs.

[0037] After the vehicle domain controller integrates the algorithm, it can feed back the vehicle diagnostic signals and calculation results to the SOC, which makes it feasible and convenient for subsequent offline or remote problem troubleshooting and tracking. In addition, in the subsequent OTA process, the baseline version review and testing of the domain controller can also reduce the inherent risks brought by the changes to the algorithm itself and the integration risks brought by the changes to other modules. Therefore, it can also reduce the maintenance cost of the software.

[0038] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A multi-source active noise reduction system based on vehicle domain control integration, characterized by: The invention comprises a whole vehicle domain controller (2), a power amplifier (6) and a vibration acceleration signal (5) arranged on a vehicle body or a chassis, wherein the whole vehicle domain controller (2) is provided with a domain control A2B signal receiver (9) and a SOC built-in DSPs (12), and the domain control A2B signal receiver (9) is connected to the vibration acceleration signal (5) and the SOC built-in DSPs (12); the whole vehicle domain controller (2) is provided with a microphone signal (3), and the microphone signal (3) is connected to the SOC built-in DSPs (12) and the domain control A2B signal receiver (9); the whole vehicle domain controller The controller (2) is provided with an ADC converter (4), and the ADC converter (4) is connected to a microphone signal (3) and a DSPs (12) built into the SOC; the whole vehicle domain controller (2) is provided with a CAN signal (16), and the CAN signal (16) is connected to the DSPs (12) built into the SOC; the whole vehicle domain controller (2) is provided with an MCU (14), and the MCU (14) is connected to the DSPs (12) built into the SOC; the whole vehicle domain controller (2) is provided with a noise reduction algorithm (11), and the noise reduction algorithm (11) is connected to the MCU (14).

2. The multi-source active noise reduction system based on vehicle domain control integration according to claim 1 is characterized in that: The power amplifier (6) is provided with a power amplifier A2B signal receiver (8), and the uplink channel of the power amplifier A2B signal receiver (8) is connected to the domain control A2B signal receiver (9).

3. The multi-source active noise reduction system based on vehicle domain control integration according to claim 1 is characterized in that: The vehicle domain controller (2) is provided with a noise reduction signal and sound effect signal mixer (10), and the noise reduction signal and sound effect signal mixer (10) is connected to a noise reduction algorithm (11) and a power amplifier (6).

4. The multi-source active noise reduction system based on vehicle domain control integration according to claim 1 is characterized in that: The vehicle domain controller (2) is provided with fault diagnosis information (15), and the fault diagnosis information (15) is connected to the noise reduction algorithm (11).

5. The multi-source active noise reduction system based on vehicle domain control integration according to claim 1 is characterized in that: One end of the power amplifier (6) is connected to a cockpit speaker (7), and a SOC (1) is provided on the vehicle domain controller (2).

6. The multi-source active noise reduction system based on vehicle domain control integration according to claim 1 is characterized in that: The whole vehicle domain controller (2) is provided with noise reduction algorithm calibration data (13), and the noise reduction algorithm calibration data (13) is connected to the noise reduction algorithm (11).

7. Complete vehicle, characterized in that: A multi-source active noise reduction system based on vehicle domain control integration comprising any one of claims 1-6.

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