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The defense date of the thesis is 2012-02-14
The current date is 2019-02-22
URN etd-0214112-165123 Statistics This thesis had been viewed 1442 times. Download 0 times. Author Chia-Hao Chang Author's Email Address No Public. Department Mechanical Engineering Year 2011 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 60 Title Investigation on Humidity Measurement Utilizing Quartz Crystal Sensors Keyword QCM polyaniline humidity Pseudo-LFE Pseudo-LFE humidity polyaniline QCM Abstract In recent years, there is a huge demand for development of a humidity measurement system, which not only can be applied in industry but also can monitor environmental comfort. A potential humidity sensor must possess the performances: high sensitivity, fast response good reproduction, and low cost.
In this thesis, the quartz crystal sensors with nanostructured polyaniline as sensing film nanostructured polyaniline are developed for humidity measurement. In the experiment, we led to nitrogen gas of different humidity concentrations and measured the frequency change of the quartz crystal sensors with two kinds of electrode configurations, like QCM and Pseudo-LFE. Results show that when relative humidity is greater, the frequency shift is higher. When leading into the nitrogen gas of the same relative humidity, the frequency shift is repeatable. Especially, the frequency shift of the quartz crystal sensor with Pseudo-LFE electrode are greater than the that with QCM electrode. We note that the quartz crystal sensor with Pseudo-LFE electrode using nanostructured polyaniline as sensing film is a promising candidate for humidity sensor.
Advisor Committee Yung-Yu Chen - advisor
Jia-Houng Sun - co-chair
Shih-Yung Pao - co-chair
Files Date of Defense 2011-07-27 Date of Submission 2012-02-14