X-ray apparatus for measuring paper web moisture and the like专利检索-辐射屏蔽辐射防护防辐射专利检索查询-专利查询网

X-ray apparatus for measuring paper web moisture and the like

阅读：275发布：2022-06-25

专利汇可以提供X-ray apparatus for measuring paper web moisture and the like专利检索，专利查询，专利分析的服务。并且A pick-up is provided for a measuring device used to measure the moisture content, the filler content or the content of coating material of a paper web or the like. The measuring takes place by the X-ray fluorescence method. The pick-up has a radiation source which is ring-shaped and is located on the same side of the paper web as the detector which is located behind the radiation source. The invention is particularly characterized by the provision of a ring-shaped radiation shield placed between the radiation source and the window of the detector. The dimensions of the radiation shield are so selected that a flat-top maximum is produced in a characteristic curve indicating the dependence of the measuring signal from the distance between the radiation source and the backing material, other characteristics remaining constant.，下面是X-ray apparatus for measuring paper web moisture and the like专利的具体信息内容。

权利要求

1. In a measuring device for ascertaining contents of various substances backing a moving web by the X-ray fluorescence method, a monitoring means comprising a radio-isotope constituting a primary radiation source and a detector, said primary radiation source being located between the moving web and said detector, said detector monitoring characteristic X-ray radiation produced by said primary radiation source in the web backing and producing a signal indicating the content of the substance being investigated in the web, an annular radiation shield having a bottom and two annular flanges directed toward said web, said primary radiation source being located on the bottom of said radiation shield, and an inner annular flange having a detector window located in the center of said radiation shield, the ratio of the diameter of the detector window and the height of said flange, and the distance of the monitoring means from the web, being such that the effect of changes in the distance between the monitoring means and the web upon said signal of the detector is within the limits permitted by the intensity of the primary radiation source.

2. A monitoring means in accordance with claim 1, wherein said distance provides a maximum signal from said detector at a specific primary radiation intensity.

3. A monitoring means in accordance with claim 1, wherein said ratio is 1.0-2.0.

4. A monitoring means in accordance with claim 1, used for measuring contents of vaRious substances in a moving paper web.

5. A monitoring means in accordance with claim 1, used for measuring moisture content of a moving paper web.

6. A monitoring means in accordance with claim 1, used for measuring filler content of a moving paper web.

7. A monitoring means in accordance with claim 1, used for measuring coating material content of a moving paper web.

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X-ray apparatus for measuring paper web moisture and the like

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