%0 Journal Article
%T Real-Time Remote Monitoring of Temperature and Humidity Within a Proton Exchange Membrane Fuel Cell Using Flexible Sensors
%A Long-Sheng Kuo
%A Hao-Hsiu Huang
%A Cheng-Hao Yang
%A Ping-Hei Chen
%J Sensors
%D 2011
%I MDPI AG
%R 10.3390/s110908674
%X This study developed portable, non-invasive flexible humidity and temperature microsensors and an in situ wireless sensing system for a proton exchange membrane fuel cell (PEMFC). The system integrated three parts: a flexible capacitive humidity microsensor, a flexible resistive temperature microsensor, and a radio frequency (RF) module for signal transmission. The results show that the capacitive humidity microsensor has a high sensitivity of 0.83 pF%RH£¿1 and the resistive temperature microsensor also exhibits a high sensitivity of 2.94 ¡Á 10£¿3 ¡ãC£¿1. The established RF module transmits the signals from the two microsensors. The transmission distance can reach 4 m and the response time is less than 0.25 s. The performance measurements demonstrate that the maximum power density of the fuel cell with and without these microsensors are 14.76 mW¡¤cm£¿2 and 15.90 mW¡¤cm£¿2, with only 7.17% power loss.
%K flexible humidity microsensor
%K flexible temperature microsensor
%K radio frequency module
%K power density
%U http://www.mdpi.com/1424-8220/11/9/8674