Active control noise reduction system and method for automobile engine noise

Abstract

The invention discloses an active control noise reduction system and method for automobile engine noise. The active control noise reduction system includes: a vehicle information recognition system for receiving signals of the rotation speed of an engine, vehicle doors, vehicle windows, the temperature and humidity of the interior and the exterior of the vehicle, and an entertainment system in vehicle CAN network communication, determining the state of a vehicle, and completing initial monitoring; an active control sounding system for real-time self-adaption control calculation, sending a plurality of control signals to an automobile loudspeaker system, controlling a loudspeaker to send sound waves having the corresponding frequency, phase and energy, and achieving active control noise elimination of the interior of the vehicle; a vehicle internal environment monitoring system for monitoring sound energy of all key points in the vehicle in real time, feeding a sound energy signal as aninput signal back to the active control sounding system as a reference signal, and monitoring vehicle internal noise change in real time. The active control noise reduction method is shown in description. The active control method can reduce interference of engine noise to passengers in the vehicle, and the vehicle internal sound quality of the automobile can be improved.

Description

technical field [0001] The invention relates to the technical field of active noise reduction in vehicles, in particular to an active control noise reduction system and method for automobile engine noise. Background technique [0002] The current active noise reduction technology is based on extracting the frequency information of the noise signal as the control input for the noise reduction in the car, which cannot perform real-time and accurate noise reduction effect processing. [0003] The application number is 201611087346.5, the publication date is February 08, 2017, and the patent title is "An active noise reduction device and method based on engine speed", which extracts the noise signal near the engine in the front cabin as the noise reduction frequency Input, in fact, the noise generated by various systems such as the compressor, starter motor, cooling fan, and air intake system is mixed in the front cabin. The microphone cannot automatically identify the effective...

AI Technical Summary

Problems solved by technology

[0002] The current active noise reduction technology is based on extracting the frequency information of the noise signal as the control input for the noise reduction in the car, and cannot perform real-time and accurate noise reduction effect processing

[0003] The application number is 201611087346.5, the publication date is February 08, 2017, and the patent title is "An active noise reduction device and method based on engine speed", which extracts the noise signal near the engine in the front cabin as the noise reduction frequency Input, in fact, the noise generated by various systems such as the compressor, starter motor, cooling fan, and air intake system is mixed in the front cabin. The microphone cannot automatically identify the effective noise frequency of the engine, and cannot effectively reduce the engine noise in the car.

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