Compact fiber-optic diode-laser sensor system for wide-dynamic- range relative humidity measurement

A compact fiber-optic diode-laser sensor system for measuring relative humidity is studied. In such a system, a distributed feed- back laser lasing near 1877 nm is used as light source while a high-precision Pt resistance as temperature sensor, an accuracy of 0.1% relative-humidity can be achieved....

Full description

Saved in:
Bibliographic Details
Published in:中国科学通报：英文版 2011, Vol.56 (32), p.3486-3492
Main Author: SUN Ke, XIE Liang JU Yu WU XuMing HOU Jie HAN Wei WANG Xin MAN JiangWei LIU Yu YUAN HaiQing LUO ZhenAo XIONG Shang ZHU NingHua
Format: Article
Language:English
Subjects:
传感器系统
光纤传感器
宽动态范围
湿度测量系统
激光二极管
相对湿度
紧凑型
铂电阻温度传感器
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A compact fiber-optic diode-laser sensor system for measuring relative humidity is studied. In such a system, a distributed feed- back laser lasing near 1877 nm is used as light source while a high-precision Pt resistance as temperature sensor, an accuracy of 0.1% relative-humidity can be achieved. The laser sensor system is able to lock to the absorption peak and calculate the density of water vapor without any additional reference measurements. Using programs built in to the microcontroller unit, the laser system can switch functions between direct measurement at high density and second-harmonic detection at low density. The system can switch between the two modes automatically and work in a wide dynamic range.
ISSN:1001-6538
1861-9541