| CPC B60W 40/06 (2013.01) [G06V 20/588 (2022.01); B60W 2420/54 (2013.01)] | 8 Claims |
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1. A method for identifying water on a road surface via ultrasonic return intensity analysis, comprising:
generating, using a processor, a road surface mapping of a road surface of an environment of a vehicle,
wherein the vehicle comprises an autonomous vehicle and the road surface is positioned along a ground surface;
transmitting, using one or more ultrasonic transducers, one or more ultrasonic waves in a direction of the road surface;
receiving, using the one or more ultrasonic transducers, one or more returned ultrasonic waves, wherein the one or more returned ultrasonic waves return to the one or more ultrasonic transducers after reflecting off the road surface;
determining an intensity of the one or more returned ultrasonic waves;
when the intensity is below a threshold intensity, using the processor to determine that a location at which the returned ultrasonic waves reflected off of the road surface has water present;
measuring, by the processor, a first distance from the one or more ultrasonic transducers to the road surface based on the intensity of the one or more returned ultrasonic waves;
measuring, by the processor, a second distance from the one or more ultrasonic transducers to the ground surface based on the intensity of the one or more returned ultrasonic waves;
determining, by the processor, a degree of wetness of the road surface based on a difference between the first distance and the second distance;
adjusting driving instructions for the vehicle based on the degree of wetness; and
using the processor, reducing a speed of the vehicle based on the degree of wetness of the road surface by implementing the driving instructions.
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