公开(公告)号：US3851176A

公开(公告)日：1974-11-26

申请号：US41299473

申请日：1973-11-05

Applicant: BENDIX CORP

Inventor： JEUNEHOMME M ,  JOHNSON M

IPC: G01N21/35 ,  G01N21/34

CPC classification number: G01N21/3504

Abstract: A non-dispersive infra-red gas analyzer capable of measuring concentrations of more than one component of a sample gas mixture. Beam chopper means synchronously diverts IR along separate paths each of which terminates in the same sample gas cell. A filter cell capable of absorbing all IR in the absorption band of one component but transmitting IR absorbable by other components is placed in each separate path. Beams in the separate paths alternately act as reference and sample beams. The output from detectors sensible to IR absorbable by each component is synchronously demodulated to give separate indications of the concentrations of the components.

Abstract translation: 一种能够测量样品气体混合物中多于一种组分的浓度的非分散红外分析仪。 束斩波器意味着沿独立的路径同步地转移IR，每个路径终止于相同的样气池中。 能够吸收一个部件的吸收带中的所有红外线，但能够吸收由其它部件吸收的IR的滤光片放置在每个分离的路径中。 在独立路径中的梁交替作为参考和采样梁。 对每个组分可吸收的可感知IR的检测器的输出进行同步解调，以提供组件浓度的单独指示。

公开(公告)号：US3820015A

公开(公告)日：1974-06-25

申请号：US28479472

申请日：1972-08-30

Applicant: BENDIX CORP

Inventor： JEUNEHOMME M

IPC: G01N27/66 ,  H01J49/14 ,  G01N27/62 ,  H01J37/00

CPC classification number: H01J49/14 ,  G01N27/66

Abstract: A sensor for measuring the concentration of oxygen in exhaust gas from an internal combustion engine in which a source of low energy beta electrons for ionizing oxygen molecules is disposed in a secondary exhaust conduit is illustrated herein. A constant volume pump moves exhaust gas through the secondary conduit at a predetermined rate. A collector plate is disposed downstream from the source of beta electrons, and a potential difference is maintained between the beta electron source and the collector plate so that oxygen ions separate from any other ions that might be produced and strike the collector plate. The charge on that plate is then measured to determine the concentration of oxygen in the exhaust gas.