Pedestrian alert system and method
First Claim
1. A method for a vehicle to warn pedestrians, comprising:
- measuring a total noise level proximate the vehicle using a vehicle-mounted microphone;
determining an estimated vehicle noise level based on at least one of vehicle speed, vehicle trajectory, and vehicle accessory activity;
estimating an ambient noise level proximate the vehicle by subtracting the estimated vehicle noise level from the total noise level; and
generating a warning sound external to the vehicle based on a signal from a pedestrian detection sensor wherein at least one of an intensity or a frequency of the warning sound is based on the ambient noise level.
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Accused Products
Abstract
A pedestrian warning or alert system and method are disclosed. The warning system is mounted on an electric vehicle. The warning system includes a front speaker system, a rear speaker system, a front pedestrian detector, a rear pedestrian detector, and an electronic control unit (ECU) electronically coupled to the front speaker system, the rear speaker system, the front pedestrian detector, and the rear pedestrian detector. The ECU commands the front speaker system to emit a warning sound based on the front pedestrian detector detecting a pedestrian-shaped object and commands the rear speaker system to emit a warning sound based on the rear pedestrian detector detecting a pedestrian-shaped object. The ECU is coupled to a microphone, the signal of which is used to estimate an ambient noise level. The intensity and frequency of the warning sound commanded from the front and/or rear speaker system is based on the ambient noise level.
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Citations
10 Claims
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1. A method for a vehicle to warn pedestrians, comprising:
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measuring a total noise level proximate the vehicle using a vehicle-mounted microphone; determining an estimated vehicle noise level based on at least one of vehicle speed, vehicle trajectory, and vehicle accessory activity; estimating an ambient noise level proximate the vehicle by subtracting the estimated vehicle noise level from the total noise level; and generating a warning sound external to the vehicle based on a signal from a pedestrian detection sensor wherein at least one of an intensity or a frequency of the warning sound is based on the ambient noise level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification