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2. 发明授权

US4672841A Measuring head for measuring the porosity of a moving strip 失效
标题翻译：用于测量移动条带孔隙度的测量头
公开(公告)号：US4672841A
公开(公告)日：1987-06-16
申请号：US882089
申请日：1986-07-03
申请人： Hans K. Schuster , Jens-Peter Heins , Bernhard Gockel , Holger Schmidt
发明人： Hans K. Schuster , Jens-Peter Heins , Bernhard Gockel , Holger Schmidt
IPC分类号： G01N15/08
CPC分类号： G01N15/0806 , G01N2015/086
摘要： The invention relates to a measuring head for measuring the porosity of a moving strip of porous material. The measuring chamber of the measuring head is covered by a measuring plate in which measuring openings are provided. For porosity measurement, air is sucked in through the porous strip and the measuring openings into the measuring chamber. The amount of air flowing into the measuring chamber is measured by a measuring arrangement connected to the measuring air connector and serves as a measure of the porosity of the strip. The measuring plate is surrounded by a guide plate which partially overlaps a blowing ring. The guide plate and blowing ring together form a blowing slot surrounding the measuring plate, the blow-out opening of which is directed outwardly and tangentially to the lower surface of the moving strip. The necessary blowing air is introduced via a connector into an annular channel, which is formed from a semi-circular groove in the blowing ring and merges into the blowing slot. The blowing air flowing horizontally from the blow-out opening produces a reduced pressure between the lower surface of the moving strip and the curved upper surface of the blowing ring. As a result of this reduced pressure, the strip is pressed onto the edge of the guide plate so that the measuring chamber is laterally sealed and air can flow in only through the measuring openings. A filter can be provided between the measuring openings in the meauring plate and the measuring air connector. An additional suction connector enables cleaning of the filter and of the measuring chamber by means of cleaning air introduced through the measuring air connector.
摘要翻译：本发明涉及一种用于测量多孔材料移动带的孔隙率的测量头。测量头的测量室由设有测量开口的测量板覆盖。对于孔隙度测量，空气通过多孔条和测量孔吸入测量室。通过连接到测量空气连接器的测量装置测量流入测量室的空气量，并用作测量条带孔隙度的量度。测量板由与吹塑环部分重叠的导板包围。引导板和吹风环一起形成围绕测量板的吹风槽，其吹出开口朝着移动条的下表面向外和切向地指向。必要的吹风通过连接器引入环形通道，环形通道由吹风环中的半圆形槽形成并且合并到吹风槽中。从吹出口水平流动的吹送空气在移动带的下表面和吹风环的弯曲上表面之间产生减压。由于这种减小的压力，带材被压在引导板的边缘上，使得测量室被侧向密封，空气只能通过测量开口流动。可以在测量板和测量空气连接器中的测量开口之间设置过滤器。附加的抽吸连接器可以通过清洁通过测量空气连接器引入的空气来清洁过滤器和测量室。

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