Method for Electric Vehicle Pedestrian Alert Sound Multi-Vehicle Adjustment

摘要

The present invention provides a method to adjust the electric vehicle pedestrian alert sound in the presence of multiple electric vehicles. The vehicle will first determine if it is in the appropriate gear and at the appropriate speed to activate the pedestrian alert sound. If the vehicle is below the speed threshold 1, the system is able to activate. If the vehicle speed isO mph, a stopped adjustment isapplied to the pedestrian alert sound. The system checks if vehicle to vehicle communication detects another electric vehicle within itsthreshold distance range 2. If NO, the pedestrian alert sound remains unchanged. The system will then check if its near field microphone del ectsa PFAF sound above itsdB limit. If NO, the pedestrian alert sound remains unchanged. If YES to either of condition 2, the number of electric vehicles are counted 3. A filter is applied to the pedestrian alert sound to reduce its amplitude, while an alerting chime is added to the pedestrian alert sound 4. The process repeats the loop every time interval.