Pedestrian sound warning device, based on environmental sound feedback, of new energy vehicle

Abstract

The invention discloses a pedestrian sound warning device, based on environmental sound feedback, of a new energy vehicle. The pedestrian sound warning device comprises a main control module (21), a voice chip module (22), a power amplifier module (23), an environmental sound signal acquiring module (26) and a loudspeaker (27), wherein the main control module (21) is used for sending a play instruction to the voice chip module (22); the voice chip module (22) is used for sending a sound signal to the power amplifier module (23); the power amplifier module (23) is used for driving the loudspeaker (27) to play the sound signal; the environmental sound signal acquiring module (26) is used for sending a sound pressure signal of the environmental sound to the main control module (21); the main control module (21) is used for determining the volume of the sound signal to be played according to the sound pressure signal and controlling the output power of the power amplifier module (23) based on the volume. The pedestrian sound warning device, based on environmental sound feedback, of the new energy vehicle is capable of determining the play volume according to the environmental sound and solving the problems that large sound in night disturbs residents, plosive sound is generated when the machine is started and interruption is caused by un-smoothness of volume changes.

Description

technical field [0001] The invention relates to the technical field of sound alarms, in particular to a sound warning device for new energy vehicles and pedestrians based on environmental sound feedback. Background technique [0002] In modern society, cars have become an indispensable tool in people's lives. Private cars and buses facilitate people's travel. Cars are replacing bicycles as an important means of transportation in people's lives. In recent years, with the increasing global air pollution, countries have paid more and more attention to the protection of the environment and the prevention and control of air pollution. Vehicle exhaust emissions are considered to be one of the main sources of air pollution. New energy vehicles refer to vehicles with advanced technical principles, new technologies and new structures that use unconventional vehicle fuels as power sources or use conventional vehicle fuels and adopt new vehicle power devices. With the rise of new ener...

AI Technical Summary

Problems solved by technology

The new energy vehicle is driven by a new type of engine, and the sound it emits is very small and is drowned by the environmental noise, which causes the car to be in a "quiet state", that is, the sound of the new energy vehicle is relatively small during driving, and it is not easy to be found by pedestrians , it is easy to cause traffic accidents, and, as long as the car starts to sound, the loudness of the sound is fixed. There is no difference between day and night. The same loudness can play a role in warning pedestrians during the day, and the same loudness at night If the environment is relatively quiet, it will become a nuisance

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