IR LONG-PATH PHOTOMETRY - A REMOTE-SENSING TOOL FOR AUTOMOBILE EMISSIONS

被引：128

作者：

BISHOP, GA ^{[1
]}

STARKEY, JR ^{[1
]}

IHLENFELDT, A ^{[1
]}

WILLIAMS, WJ ^{[1
]}

STEDMAN, DH ^{[1
]}

机构：

[1] UNIV DENVER,DEPT PHYS,DENVER,CO 80208

来源：

ANALYTICAL CHEMISTRY | 1989年 / 61卷 / 10期

关键词：

Carbon dioxide - Carbon monoxide - Infrared radiation - Photometry--Computer Applications - Remote sensing;

D O I：

10.1021/ac00185a002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The authors undertook a new approach using an old technology to develop a long-path IR photometer that can remotely measure CO emissions from operating vehicles. The University of Denver's instrument consists of three basic units: the source, a detector, and a computer. IR absorption is used to determine the amounts of CO and CO2 emitted by a passing automobile. The IR light source, located on one side of a roadway, sends a collimated beam into a gas filter radiometer equipped with two liquid-nitrogen-cooled indium antimonide photovoltaic detectors. A 4.3-μm bandpass filter isolates the CO2 spectral region, and a 4.6-μm beam passes through a rotating gas filter wheel one-half of which contains a CO and H2 mixture and the other half N2. The rotating wheel modulates the signal and provides both a reference channel and a CO data channel.

引用

页码：A671 / &

共 18 条

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