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    • 3. 发明申请
    • Liquid level detection method and apparatus
    • 液位检测方法及装置
    • US20050151764A1
    • 2005-07-14
    • US10935343
    • 2004-09-07
    • Timothy GradyYichuan Pan
    • Timothy GradyYichuan Pan
    • B41J2/175G01F23/292B41J29/38
    • G01F23/2922B41J2/17509B41J2/17513B41J2/1752B41J2/17523B41J2/17553B41J2/17566B41J2002/17573
    • A sensing system is described for detecting the presence of ink at a predetermined level in an ink reservoir for an ink jet printer. The reservoir includes a perimetric wall having first and second wall sections, wherein at least a portion of said first wall section and a portion of the second wall section are substantially transmissive to light. A light emitter is located proximate to the first wall section and positioned at the predetermined level. A photo detector is positioned at the predetermined level and located proximate to the second wall section for detecting the light emitted from the light emitter, the light emitter being oriented to direct light at the photodetector. The light from the light emitter follows a first path when ink is present in the reservoir at the predetermined level and follows a second path when ink is not present in the reservoir at the predetermined level, the photodetector receiving the light from the light emitter traveling only one of the first path or the second path.
    • 描述了用于检测在用于喷墨打印机的墨水储存器中预定水平的墨水的存在的感测系统。 储存器包括具有第一和第二壁部分的周边壁,其中所述第一壁部分的至少一部分和第二壁部分的一部分基本上是透光的。 光发射器位于第一壁部分附近并且定位在预定水平。 光检测器位于预定水平并位于第二壁部分附近,用于检测从发光体发射的光,该光发射器被定向成在光电检测器处引导光。 当墨水以预定水平存在墨水时,来自光发射器的光沿着第一路径,并且当油墨在存储器中不存在于预定水平面时,遵循第二路径,光电检测器接收来自光发射器的光仅行进 第一条路径或第二条路径之一。