Windshield wiper controller, optical raindrop detector and detection method thereof
    4.
    发明授权
    Windshield wiper controller, optical raindrop detector and detection method thereof 有权
    挡风玻璃刮水器控制器,光学雨滴检测器及其检测方法

    公开(公告)号:US08914197B2

    公开(公告)日:2014-12-16

    申请号:US13837518

    申请日:2013-03-15

    Abstract: There is provided an optical raindrop detector including a light source, a light guide, an image sensor and a processing unit. The light source alternatively emits light with different brightness values. The light guide has an incident surface, a detection surface and an ejection surface, wherein the light source emits incident light into the light guide via the incident surface, and a plurality of microstructures are formed on the ejection surface to reflect the incident light to become scattered light toward the detection surface. The image sensor receives reflected light formed by raindrops in front of the detection surface reflecting the scattered light to penetrate the light guide and eject from the ejection surface, and generates image frames corresponding to the different brightness values of the light source. The processing unit calculates differential images of the image frames to accordingly identify rain intensity.

    Abstract translation: 提供了一种包括光源,光导,图像传感器和处理单元的光学雨滴检测器。 光源交替地发出具有不同亮度值的光。 光导具有入射面,检测面和喷射面,其中光源通过入射面将入射光发射到光导中,并且在喷射表面上形成多个微结构以反射入射光,成为 散射光朝向检测面。 图像传感器接收由检测表面前方的雨滴形成的反射光,反射散射光以穿透光导并从喷射表面弹出,并产生与光源的不同亮度值对应的图像帧。 处理单元计算图像帧的差分图像以相应地识别雨强度。

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