Pedestrian warning device for electric cars, warning method and electric car

Abstract

The invention relates to the technical field of vehicles, in particular to a pedestrian warning device for electric cars, a warning method and an electric car. The pedestrian warning device for the electric cars comprises a CAN bus interface module connected with a vehicle control unit by a CAN bus in a communication mode, an infrared detection sensor, a distance sensor, a background noise sensorand a main controller, wherein the main controller is used for generating sound warning signals and sending the signals to a loudspeaker based on noise signals received in real time when the speed ofthe car is within a warning speed threshold range and an organism within a warning distance threshold range is detected, and adjusting strength of the warning signals in real time according to strength of the noise signals to adjust volume of the loudspeaker. According to the pedestrian warning device for the electric cars, the warning method and the electric car, the conditions that the speed ofthe car is within the warning speed threshold range and the organism within the warning distance threshold range is detected are equivalent to a warning switch, and when the conditions are met, warning is started, so that pedestrians are effectively warned.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a pedestrian warning device for an electric vehicle, a warning method and the electric vehicle. Background technique [0002] With the popularization of electric vehicles, the air pollution and environmental noise pollution caused by traditional fuel vehicles are gradually reduced. However, this also creates some downsides as electric vehicles are too quiet. For example, especially when the speed of an electric vehicle is relatively low, in front of the vehicle, when a pedestrian walks with his back to the vehicle, it is often difficult for the pedestrian to notice that the vehicle is gradually approaching. This will cause certain hidden dangers to the safety of pedestrians. [0003] The solution in the prior art is to add an extra audio circuit to the electric vehicle. When the vehicle is running at a low speed, the audio circuit emits a corresponding prompt sound, thereb...

AI Technical Summary

Problems solved by technology

However, in the prior art, the prompt tone cannot truly reflect the distance between the vehicle and the pedestrian

This will cause distance perception errors for pedestrians, which will also cause safety hazards, and the warning sound will always be issued regardless of whether there are pedestrians or not, which will cause noise pollution to the environment, and at the same time cause certain interference to the driver itself, affecting the driving experience.

Images