System for realizing low-speed warning tone AVAS and active sound enhancement ASE on automobile

Abstract

The invention discloses a system for achieving low-speed warning tone AVAS and active sound enhancement ASE on an automobile, low-speed warning tone and active sound enhancement processing is carried out through cooperation of two processing units, and a low-speed warning tone and active sound enhancement function is achieved in cooperation with a rear-end AVAS module. When the system realizes the low-speed warning tone function, an additional analog audio channel specially used for a low-speed warning tone loudspeaker does not need to be configured in the same vehicle machine system device, and the rear-end AVAS module realizes the low-speed warning tone function in a mode of sharing a certain in-vehicle analog audio channel and using an independent PWM (Pulse Width Modulation) transmission channel. And the system has the functions of judging and switching working modes. The sound generated by the system can be changed and matched along with the change of the vehicle state and the driving style of the user, so that information is effectively transmitted to other road users, and the sound perception in the driving process is enhanced or changed.

Description

technical field [0001] The invention belongs to the technical field of automobile engineering, and mainly relates to the low-speed prompt sound of automobiles, the active sounding of automobiles, and the sound enhancement technology. Background technique [0002] With the advancement of vehicle vibration and noise reduction technology and the development of new energy vehicles such as electric vehicles and hybrid vehicles, the overall noise outside and inside the vehicle has been significantly reduced, especially for new energy vehicles such as electric vehicles. The significantly reduced external noise makes the car relatively difficult to be noticed and discovered by other traffic participants, especially pedestrians, in road traffic, which increases safety risks. "Requirements", various countries have formulated regulations and standards for electric vehicles (including hybrid vehicles with pure electric driving mode) low-speed alerting sound (Acoustic Vehicle Alerting Sy...

AI Technical Summary

Problems solved by technology

[0005] At the same time, since most of the existing car-machine systems are only equipped with audio channels for the speakers in the car, no additional audio channels for the low-speed prompt sound speakers installed outside the car are configured, and there is no The AVAS function is reserved when designing the car-machine system. If an AVAS dedicated audio channel is added, the design of the car-machine system hardware needs to be changed, which is costly and takes a long time.

[0006] In addition, the current low-speed prompt sound and active sound enhancement sound design cannot adapt to environmental characteristics such as road conditions, traffic flow, and traffic participant behavior, as well as user characteristic information such as user driving habits, driving style, mood, and micro-expression recognition. Adjustment

For example, when the vehicle is driving under real-time traffic conditions such as different traffic flow, road sections, road conditions, etc., such as when driving to an area where there are many other traffic participants such as schools during school hours, the AVAS system will emit a sound feature, Such as frequency, sound pressure level, etc. cannot be automatically adjusted

Different users have different expectations for the characteristics and tendencies of ASE sound under different driving psychological needs. The characteristics of the sound of the existing ASE system, such as frequency, sound pressure level, and opening status, cannot be automatically adjusted and adjusted automatically. optimization

The sound styles or characteristics of ASE and AVAS are relatively limited, and cannot be updated online or in a timely manner.

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