LPG-based PVA coated sensor for relative humidity measurement

被引：74

作者：

Venugopalan, T. ^{[1
]}

Yeo, Teck L. ^{[1
]}

Sun, Tong ^{[1
]}

Grattan, Kenneth T. V. ^{[1
]}

机构：

[1] City Univ London, Sch Engn & Math Sci, London EC1V 0HB, England

来源：

IEEE SENSORS JOURNAL | 2008年 / 8卷 / 7-8期

基金：

英国工程与自然科学研究理事会;

关键词：

humidity; long period grating (LPG); optical fiber; polyvinyl alcohol (PVA); sensors;

D O I：

10.1109/JSEN.2008.926524

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A long period grating (LPG) coated with polyvinyl alcohol has been developed and evaluated through exposure to a range of relative humidity (RH) levels (from 33%RH to 97%RH). The conditions for the creation of the sensor probes are described and the response of the device in terms of changes in the resonance loss of several of the spectral loss bands has been monitored. In order to make comparative measurements, a noncoated LPG was exposed to various known refractive index (RI) conditions and the grating response was monitored, analyzed and the results evaluated. This is then related to the change in RH when the sensor is exposed to various RH levels, as the coating RI changes, leading to the change in resonance loss. The PVA coated LPG sensor is showing a relatively fast response time of similar to 80 s to reach 97%RH from 33%RH and inducing similar to 2 dB change in transmission of resonance loss band.

引用

页码：1093 / 1098

页数：6

共 25 条

[1]

*ASTM, E10485 ASTM

[2] OPTICAL WAVE-GUIDE HUMIDITY DETECTOR [J].

BALLANTINE, DS ;

WOHLTJEN, H .

ANALYTICAL CHEMISTRY, 1986, 58 (13) :2883-2885

[3] SIMPLE FIBER OPTIC PH SENSOR FOR USE IN LIQUID TITRATIONS [J].

BENAIM, N ;

GRATTAN, KTV ;

PALMER, AW .

ANALYST, 1986, 111 (09) :1095-1097

[4] Applications of long-period gratings to single and multi-parameter sensing [J].

Bhatia, V .

OPTICS EXPRESS, 1999, 4 (11) :457-466

[5]

Bhatia V., 1996, THESIS VIRGINIA POLY

[6] Highly sensitive optical humidity probe [J].

Dacres, H. ;

Narayanaswamy, R. .

TALANTA, 2006, 69 (03) :631-636

[7] Optical fiber relative-humidity sensor with polyvinyl alcohol film [J].

Gastón, A ;

Pérez, F ;

Sevilla, J .

APPLIED OPTICS, 2004, 43 (21) :4127-4132

[8] HUMIDITY FIXED-POINTS OF BINARY SATURATED AQUEOUS-SOLUTIONS [J].

GREENSPAN, L .

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1977, 81 (01) :89-96

[9] A novel probe for a fiber optic humidity sensor [J].

Gupta, BD ;

Ratnanjali .

SENSORS AND ACTUATORS B-CHEMICAL, 2001, 80 (02) :132-135

[10]

Healy W. M., 2003, P 24 AIVC C BETEC C, P277

← 1 2 3 →