公开(公告)号：US3790798A

公开(公告)日：1974-02-05

申请号：US3790798D

申请日：1972-08-18

Applicant: METRO HYDRAULICS INC

Inventor： LENNINGTON J ,  STERNBERG S ,  YOUNG J

IPC: G01N21/31 ,  G01N21/35 ,  G01N21/26

CPC classification number: G01N21/314 ,  G01N21/3504 ,  G01N2201/1215

Abstract: A dual path analyzer and a single path analyzer are disclosed, each for determining the concentration of one or more gaseous components in a mixture of gases. The preferred analyzer is a single path instrument which includes a source of infrared energy, a detector for the energy, a sample cell for the gas mixture positioned between the source and detector, and a filter wheel having a plurality of filters and a source blocking device positioned between the sample cell and detector for sequentially interposing the filters and the source blocking device between the source and the detector. Means are provided for amplifying the output signal of the detector and for processing the signal to provide a direct readout display which indicates the concentration of the gaseous components being analyzed. The processing electronics preferably include provision for calibrating the analyzer with clean ambient air, for compensating for background levels of radiation, and for correcting the displayed output signal for the effects of absorption band interferences between two or more gases in the gas mixture. The structure of the dual path analyzer includes a source of infrared energy, a detector for the energy, a sample cell for the gas mixture, a cell for a reference gas, and optical path means between the source and detector for sequentially directing the source energy through the sample cell, the reference cell, and through neither cell. Processing electronics similar to the single path instrument can be incorporated to compensate for background radiation and absorption band interferences.

Abstract translation: 公开了双路径分析器和​​单路径分析器，每个用于确定气体混合物中的一种或多种气体组分的浓度。 优选的分析仪是包括红外能量源的单路仪器，用于能量的检测器，用于位于源和检测器之间的气体混合物的样品池，以及具有多个过滤器和源阻挡装置的滤光轮 位于样品池和检测器之间，用于顺序地将滤色器和源阻挡装置插入在源和检测器之间。 提供了用于放大检测器的输出信号并且用于处理信号以提供指示正在分析的气体组分的浓度的直接读出显示的装置。 处理电子器件优选地包括用于用干净的环境空气校准分析器的装置，用于补偿辐射的背景水平，以及用于校正所显示的输出信号以获得气体混合物中两种或更多种气体之间的吸收带干扰的影响。 双路径分析仪的结构包括红外能量源，能量检测器，用于气体混合物的样品池，用于参考气体的池，以及源和检测器之间的光路装置，用于顺序地引导源能量 通过样品池，参比细胞，以及两个细胞。 可以结合类似于单路仪器的处理电子线来补偿背景辐射和吸收带干扰。