Structural concrete condition monitoring using a long period grating-based humidity sensor

2008 ◽  
Author(s):  
T. Venugopalan ◽  
T. Sun ◽  
K. T. V. Grattan
Keyword(s):  
Condition Monitoring ◽  
Humidity Sensor ◽  
Long Period Grating ◽  
Structural Concrete ◽  
Long Period ◽  
Concrete Condition

Optical fiber long-period grating humidity sensor with poly(ethylene oxide)/cobalt chloride coating

2006 ◽  
Vol 45 (19) ◽  
pp. 4567 ◽  
Author(s):  
Maria Konstantaki ◽  
Stavros Pissadakis ◽  
Stergios Pispas ◽  
Nicholas Madamopoulos ◽  
Nikos A. Vainos
Keyword(s):  
Ethylene Oxide ◽  
Optical Fiber ◽  
Humidity Sensor ◽  
Cobalt Chloride ◽  
Long Period Grating ◽  
Long Period ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Chloride Coating

Relative humidity sensor based on long period grating with agarose gel coating

2011 ◽  
Author(s):  
Yan Liu ◽  
Xiang Huang ◽  
Bo Liu ◽  
Yinping Miao ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Humidity Sensor ◽  
Agarose Gel ◽  
Long Period Grating ◽  
Long Period ◽  
Relative Humidity Sensor

Optical fiber relative humidity sensor based on a hydrogel coated long period grating

2011 ◽  
Author(s):  
Xiujuan Yu ◽  
Liwei Wang ◽  
Jintao Zhang ◽  
Min Zhang ◽  
Shengchun Liu ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Optical Fiber ◽  
Humidity Sensor ◽  
Long Period Grating ◽  
Long Period ◽  
Relative Humidity Sensor

Hydrogel Coated Long Period Grating Sensor for High Relative Humidity Measurement

2014 ◽  
Vol 981 ◽  
pp. 616-619 ◽  
Author(s):  
Xiu Juan Yu ◽  
Jin Tao Zhang ◽  
Xue Feng Chen ◽  
Sheng Chun Liu
Keyword(s):  
Relative Humidity ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Dip Coating ◽  
Linear Increase ◽  
High Relative Humidity ◽  
Long Period Grating ◽  
Long Period ◽  
Dip Coating Technique ◽  
Humidity Monitoring

A very sensitive hydrogel coated long period grating (LPG) humidity sensor is developed and experimentally investigated for high relative humidity monitoring. A thin-film of PINPAM hydrogel is deposited onto the cladding of LPG by using dip-coating technique. The transmission spectrum of the coated LPG is studied at different humidity levels. For humidity levels greater than 95%, the resonant dip depth suffers a sharp linear increase with a span of 10.26 dB and the resonant wavelength suffers a redshift of 8.6nm.The proposed hydrogel coated LPG humidity sensor shows a high sensitivity of 2.86dB/%RH at high relative humidity region.

Optical fiber long-period grating humidity sensor utilizing PEO/CoCl 2 outcladding overlayers

2005 ◽  
Author(s):  
Maria Konstantaki ◽  
George Papaioannou ◽  
Stavros Pissadakis ◽  
Stergios Pispas ◽  
Nicholas Madamopoulos ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Humidity Sensor ◽  
Long Period Grating ◽  
Long Period

A relative humidity sensor using a hydrogel-coated long period grating

2007 ◽  
Vol 18 (10) ◽  
pp. 3131-3134 ◽  
Author(s):  
Liwei Wang ◽  
Yang Liu ◽  
Min Zhang ◽  
Dongsheng Tu ◽  
Xianhui Mao ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Humidity Sensor ◽  
Long Period Grating ◽  
Long Period ◽  
Relative Humidity Sensor

Long-Period Grating Relative Humidity Sensor With Hydrogel Coating

2007 ◽  
Vol 19 (12) ◽  
pp. 880-882 ◽  
Author(s):  
Yang Liu ◽  
Liwei Wang ◽  
Min Zhang ◽  
Dongsheng Tu ◽  
Xianhui Mao ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Humidity Sensor ◽  
Long Period Grating ◽  
Long Period ◽  
Relative Humidity Sensor ◽  
Hydrogel Coating
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