Design of a fibre optic multi-point sensor for gas detection

被引：99
|
作者：
Stewart, G [1 ]
Tandy, C
Moodie, D
Morante, MA
Dong, F
机构：
[1] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1XW, Lanark, Scotland
[2] Gas Measurement Instruments Ltd, Renfrew PA4 9RG, Scotland
[3] Optosci Ltd, Strathclyde Univ Incubator, Glasgow G4 0LT, Lanark, Scotland
[4] Univ Cantabria, Dept Elect Technol & Syst Engn, E-39005 Santander, Spain
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 51卷 / 1-3期
基金：
英国工程与自然科学研究理事会;
关键词：
fibre optic sensors; multi-point sensors; methane sensor;
D O I：
10.1016/S0925-4005(98)00199-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report the design of a multi-point fibre optic methane sensor using a DFB laser source with a branched fibre network and micro-optic cells. Measurements are performed through derivative spectroscopy, with line scanning and digital signal processing, to give sensitivities down to a few ppm metre. The form of the derivative signal obtained from the system is modelled theoretically and compared with the experimental signal. The main limitation in the signal to noise ratio of the system is due to interference effects (etalon fringes) from the cells and we show how these effects may be minimised. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：227 / 232
页数：6
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