公开(公告)号：US09840232B1

公开(公告)日：2017-12-12

申请号：US15237746

申请日：2016-08-16

Applicant: Delphi Technologies, Inc.

Inventor： Yew Kwang Low ,  Kok Wee Yeo ,  Ke Tan

IPC: B60S1/08 ,  G01N21/55 ,  G01N21/552 ,  G01N21/47

CPC classification number: B60S1/0837 ,  G01N21/474 ,  G01N21/552 ,  G01N21/958 ,  G01N2021/4735 ,  G01N2021/945 ,  G01N2021/9586

Abstract: An illustrative example embodiment of a device for detecting rain or a substance on a windshield includes at least one radiation source, an internal reflection sensor situated to detect at least some of a first portion of the radiation that reflects from the windshield. The internal reflection sensor provides a first output that has a characteristic that differs based on whether at least one raindrop is on the windshield. A scattered reflection sensor is situated to detect at least some of a second portion of the radiation reflecting from rain near the windshield or a substance on the windshield. The scattered reflection sensor provides a second output indicative of an amount of radiation incident on the scattered reflection sensor. A processor is configured to determine a condition of the windshield based on the first output and the second output.