System for improving in-vehicle moving sound sensing quality of electric vehicle

Abstract

The invention discloses a system for improving the in-vehicle moving sound sensing quality of an electric vehicle. The system consists of a vehicle state detection module (1), a waveform storage module (2), a waveform processing module (3), a sound output module (4), an in-vehicle noise collecting module (5) and a central processor (6), wherein the waveform storage module (2) sends engine waveform signals corresponding to the vehicle state according to signals collected by the vehicle state detection module (1), and the central processor (6) uses the in-vehicle moving sound sensing quality optimization as the control strategy according to in-vehicle noise signals collected by the in-vehicle noise collecting module (5), controls the waveform processing module (3) for processing the waveform and transmits the signals to the sound output module (4) for improving the in-vehicle moving sound sensing quality. The system has the advantages that the system belongs to a sound producing system used for compensating different engine sound under different running work conditions of pure electric vehicles, so the in-vehicle moving sound sensing quality of the electric vehicle is improved.

Description

technical field [0001] The invention relates to a system for improving the sound quality of motion in an electric vehicle, in particular to a sound generation system for compensating different engine sounds under different driving conditions of a pure electric vehicle to improve the sound quality of motion in an electric vehicle. Background technique [0002] In terms of noise level, electric vehicles are quieter than internal combustion engine vehicles, but because electric vehicles have their own unique layout structure, their NVH performance is not the same as that of traditional engine vehicles. Studies have shown that for cars with the same configuration of motors and engines, the noise level of cars with motors is 3-8dB lower than that of cars with engines at full load, but the sharpness of the sound is higher than that of cars with engines. 0.3acum, passengers have obvious discomfort. In addition, due to the lack of the low-frequency noise masking effect of engine no...

AI Technical Summary

Problems solved by technology

In addition, due to the lack of the masking effect of engine noise in the middle and low frequencies, the noise of other components in the electric vehicle becomes extremely prominent and unpleasant.

Moreover, the dynamic characteristics of the sound emitted by electric vehicles under different driving conditions are not as obvious as those of engine vehicles. For example, electric vehicles do not have obvious sports sounds when accelerating, and cannot give the driver a sense of auditory subjective feedback that the vehicle is accelerating.

Therefore, only using sound pressure level to evaluate the interior noise characteristics of electric vehicles obviously cannot meet the needs of electric vehicle passengers, and using the sound quality of sports can better reflect the interior noise characteristics of electric vehicles

[0003] At present, there are related technical patents related to the sound quality adaptive noise active control system in China. For example, the in-vehicle adaptive active control system and method applied by Wang Dengfeng of Jilin University and others. The patent application number is 200910066967.9. This patent discloses an application A device and method for controlling interior noise and improving interior sound quality on a motor vehicle, but the device still has deficiencies: 1. It fails to take into account the operating state of the electric vehicle for the sound characteristics of the electric vehicle, Make the sound in the car have enough sense of movement, and can not give the driver good feedback information of the vehicle state; 2. This invention requires multiple expensive acceleration sensors to measure the vibration signal at the connection point of the vehicle's engine and suspension ,higher cost

It is also reported abroad that adding engine sound to electric vehicles can improve the sense of movement of electric vehicle interior sounds, but this kind of passive complete addition of full-band engine sound will make the sound quality in the car worse and affect the comfort of the ride.

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