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1. 发明授权

US3944834A Pollution monitor with self-contained calibration and cell-block therefor 失效
标题翻译：污染监测器，具有独立校准和电池阻挡
公开(公告)号：US3944834A
公开(公告)日：1976-03-16
申请号：US512338
申请日：1974-10-04
申请人： Raymond L. Chuan , Parameswar Mahadevan , Daryl J. Bergquist
发明人： Raymond L. Chuan , Parameswar Mahadevan , Daryl J. Bergquist
IPC分类号： G01N21/27 , G01N21/64 , G01D18/00 , G01J1/42 , G01N21/38
CPC分类号： G01N21/278 , G01N21/276 , G01N21/64 , G01N2021/6482 , G01N21/645 , G01N2201/128 , G01N2201/1286
摘要： The embodiment of the pollution monitor described in the specification uses the principle of ultraviolet-induced fluorescence to detect and measure gaseous pollution in air, smokestack exhaust and other fluids. Improved calibration or standardization is effected by the use of one or more calibration cells in which a non-gaseous material simulates the fluorescence of the gaseous species under investigation, by scattering the incident ultraviolet light into a spectral region similar to that of the fluorescence of the gaseous species. Examples of suitable materials have been found to be aluminum, gold, platinum and molybdenum, all of which scatter light in the appropriate spectral region at a level which stays substantially constant with time.In the preferred embodiment, the sample cell and the calibration cells are all formed in a single cell block by drilling holes into solid bar material which holes function as the individual cell cavities. The sample cell has ports for the flow of sample gas therethrough, while in each of the calibration cells, the metallic material is mounted to intercept and scatter the incident ultraviolet light energy. The cell block is constructed to rotate so that the several cells can be individually aligned in the light path between the ultraviolet source and fluorescence detector.
摘要翻译：本说明书中描述的污染监测器的实施例使用紫外线诱发荧光的原理来检测和测量空气，烟囱排气和其它流体中的气体污染。通过使用一种或多种校准单元来实现改进的校准或标准化，其中非气态材料通过将入射的紫外光散射到类似于荧光的光谱区域中来模拟所研究的气态物质的荧光，气态物种。已经发现合适的材料的实例是铝，金，铂和钼，所有这些材料都以适当的光谱区域中的光散射在与时间基本恒定的水平上。

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