Low-cost fiber optic sensor array for simultaneous detection of hydrogen and temperature

Chenhu Sun; Ping Lu; Ruishu Wright; Paul R. Ohodnicki

doi:10.1117/12.2304633

14 May 2018 Low-cost fiber optic sensor array for simultaneous detection of hydrogen and temperature

Chenhu Sun, Ping Lu, Ruishu Wright, Paul R. Ohodnicki

Proceedings Volume 10654, Fiber Optic Sensors and Applications XV; 1065405 (2018) https://doi.org/10.1117/12.2304633
Event: SPIE Commercial + Scientific Sensing and Imaging, 2018, Orlando, FL, United States

Abstract

Monitoring the dissolved gases and oil temperatures are the most responsive and dependable strategies of assessing the running state and health of power transformers. Novel fiber optic sensor approaches that minimize the footprint and cost of chemical sensors compatible with electrical asset insulation oil monitoring can ultimately allow the deployment on a broader range of power assets. Fiber optic sensor arrays based on nanocomposite thin films for simultaneous gas and temperature sensing at low temperatures have been fabricated. The performance of the sensor array was evaluated with two sensing elements comprised of Pd and Au nanoparticle incorporated SiO₂ thin films, which were deposited onto a coreless fiber by dip-coating in series and then fusion-spliced with two multimode fibers on either end. Such fiber optic sensor array showed monotonic responses over a wide range of H₂ at ambient conditions. A response of the localized surface plasmon resonance absorption peak of Au to changing temperatures from ambient to 110 °C was observed. Optical responses of H2 and temperatures showed opposite directions in transmission signals, which were evaluated by using principal component analysis (PCA). The resulting PCA score plot clearly shows discrimination between the characteristic signal of H₂ gas and temperature. In order to realize potential field deployment, the optical testing system employed low-cost components such as LEDs as fixedwavelength light sources and silicon photodiodes as detectors. The potential applications of such sensor arrays are dual-purpose gas and temperature sensing for on-site deployment in power transformers and other grid asset health monitoring.

Citation Download Citation

Chenhu Sun, Ping Lu, Ruishu Wright, and Paul R. Ohodnicki "Low-cost fiber optic sensor array for simultaneous detection of hydrogen and temperature", Proc. SPIE 10654, Fiber Optic Sensors and Applications XV, 1065405 (14 May 2018); https://doi.org/10.1117/12.2304633

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available