Detection of raindrops on a windowpane by means of camera and light

    公开(公告)号:US09702818B2

    公开(公告)日:2017-07-11

    申请号:US14379396

    申请日:2013-04-26

    发明人: Dieter Krökel

    摘要: A device and to a method for detecting rain, which includes a camera and a light source. The camera is arranged behind a windowpane, in particular inside a vehicle, behind a windscreen, and focused on a far range located in front of the windowpane. The light source for producing at least one light beam which is directed to the windowpane directs the at least one light beam to the windowpane in such a manner that at least one beam which is reflected by the outer side of the windowpane is incident on the camera. The structure of the image of the at least one beam reflected by the outer side of the windowpane is analyzed, in particular as part of an image processing step. The type of rain or precipitation on the outer side of the windowpane is classified based on the analysis of the structure of this image.

    METHOD AND DEVICE FOR OPERATING AN ELECTRIC BICYCLE

    公开(公告)号:US20170151997A1

    公开(公告)日:2017-06-01

    申请号:US15311046

    申请日:2015-05-12

    IPC分类号: B62M6/45 B60L15/20 B62M25/08

    摘要: A method and device for operating an electric bicycle that has an electric motor and a transmission with at least two gears is provided. The method includes ascertaining a current pedal frequency that is generated by a user of the electric bicycle and checking whether the ascertained current pedal frequency lies within a specified pedal frequency interval. The method also includes ascertaining a current travel speed of the electric bicycle, ascertaining at least two transmission gears within the specified pedal frequency interval depending on the ascertained travel speed, and ascertaining a respective output of the electric motor for each of the ascertained at least two gears. The method also includes ascertaining the lowest ascertained output of the electric motor by comparing the two ascertained outputs of the electric motor, and ascertaining the transmission gear for which the lowest output was ascertained.