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1. 发明授权

US3995169A Optical liquid level gauge 失效
标题翻译：光学液位计
公开(公告)号：US3995169A
公开(公告)日：1976-11-30
申请号：US613984
申请日：1975-09-17
申请人： Louis D. Oddon
发明人： Louis D. Oddon
IPC分类号： G01F23/292 , G01N21/26
CPC分类号： G01F23/2927 , Y10S250/906
摘要： An optical liquid level gauge is described for sensing and indicating the height of a liquid within a container, such as within a fuel tank. The gauge includes an optical liquid probe that has a plurality of U-shaped light pipes to be inserted into a tank. Each of the light pipes terminates in a U bend with the U bends of such light pipes being staggered in position relative to one another so as to be positioned at different liquid height indication levels within the tank. A source of light is provided for transmitting light into a first arm of each of the light pipes, and sensors are provided at the end of the second arm of each of such light pipes for detecting the amount of light transmitted from one end of the pipe to the other. The U bend of each pipe has a geometrical design which assures that when liquid is not present in the tank it transmits substantially all of the light received by it from the first arm of the light pipe into the second arm thereof for sensing by the sensor associated therewith. The design of the U bend is such, though, that when the liquid within the tank is at a height submerging the U bend, light received by the U bend from the first arm of the light pipe will be refracted out of such light pipe, rather than passed to the second arm thereof. The sensor associated with the end of the second arm of each light pipe is connected with a display providing a visual indication of whether or not liquid is present at the U bend and, hence, at the liquid level in the container represented by such U bend.
摘要翻译：描述了用于感测和指示容器内的液体（例如在燃料箱内）的高度的光学液位计。该计量器包括具有多个U形光管以插入到罐中的光学液体探针。每个光管终止于U形弯曲，其中这种光管的U形弯曲部相对于彼此交错位置，以便位于罐内不同的液体高度指示水平。提供光源以将光传输到每个光管的第一臂中，并且传感器设置在每个这种光管的第二臂的端部处，用于检测从管的一端传输的光量到另一个每个管道的U形弯曲具有几何设计，其确保当液体不存在于罐中时，其将基本上将由光接收的所有光从光管的第一臂传递到其第二臂中，以由传感器相关联随之而来。然而，U形弯曲的设计是这样的：当槽内的液体处于淹没U形弯曲的高度时，由U形弯曲部接收的光从光管的第一臂被折射出这种光管，而不是传递到其第二臂。与每个光管的第二臂的端部相关联的传感器与显示器连接，该显示器提供在U形弯曲处是否存在液体的视觉指示，因此在由U形弯曲表示的容器中的液面处。

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