A pedestrian warning device for new energy vehicles

Abstract

The invention discloses a pedestrian warning device for a new energy vehicle, comprising a loudspeaker and a printed circuit board; a main control unit is connected with a control device of the new energy vehicle through a CAN communication unit and receives a status signal sent by the control device of the new energy vehicle; the main control unit is electrically connected with a sound mixing unit, a sound output unit and an environment feedback unit respectively, and the environment feedback unit sends an environment noise signal to the main control unit; and the sound mixing unit is electrically connected with the sound output unit, and the sound output unit is connected with the loudspeaker. The pedestrian warning device for the new energy vehicle, disclosed by the invention, can simulate the working status of a conventional fuel vehicle, not only improves the sound effect but also eliminates potential safety hazards to pedestrians caused by sending wrong prompts, and can acquire data of the external environment in real time; and the working status of the pedestrian warning device can be quickly adjusted so as to avoid environment noise pollution or insufficient prompt sound pressure.

Description

technical field [0001] The invention relates to the technical field of sound alarms, in particular to a pedestrian warning device for new energy vehicles. 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. Countries all over the world are actively promoting new energy vehicles. The application of new energy vehicles can reduce the pollution of vehicle exhaust to the atmosphere. New energy vehicles refer to vehicles with advanced technical principles, new technologies and new structures that use unconventional v...

AI Technical Summary

Problems solved by technology

[0003] However, the sounding state of the existing technical solutions is only related to the vehicle speed, and is only applicable to the simple linear speed driving state, which is too idealized to meet the complex driving state of the car, and may even mislead pedestrians to make wrong judgments

The length of each sound is at least 512ms-1s. When the sound is switched, the second sound can only be played after the previous sound is played. The response of the sound change is slow, and it cannot provide the correct warning for rapid acceleration and deceleration, which greatly reduces the warning device. Practicality

When the sound loops or switches, there will be a very short pause sound. When the sound pressure reaches 80dB, the sound interruption is very obvious; the sound frequency switching is stepped, and there is a sense of jumping, which is difficult to receive

The working mode is single, and the working status cannot be changed according to the actual road conditions, and it is easy to disturb people due to noise.

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