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URN etd-0815116-180847 Statistics This thesis had been viewed 504 times. Download 0 times. Author Yi-Kang Huang Author's Email Address No Public. Department Communication Engineering Year 2015 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 65 Title Study of Wearable Wireless Device for Moisture Measurement of Human Skin by Voltage Difference Keyword Wireless Wearable Device Voltage Difference Mobile Application (APP) Moisture of Human Skin Interdigital Electrode (IDE) Interdigital Electrode (IDE) Moisture of Human Skin Mobile Application (APP) Voltage Difference Wireless Wearable Device Abstract Moisture of skin is the one of significant indicator of skin health. This paper proposes a wireless wearable tester that operated by Android phones to measure and record the skin moisture of human face. The main idea is simplified the electrode-skin as a resistance by Electrochemical Impedance Spectroscopy. The interdigital electrode which is often used in biosensing field contacts skin directly, and also conducts square wave signal to skin surface. However, skin moisture makes the signal attenuated differently, it also associated with impedance of skin. During high frequency signal, i.e., 10kHz, transmitting, capacitance of skin can be ignored. Thus the attenuated square wave signal only influenced by the resistance of skin, and the signal processed into output voltage. This study obtains the conversion formula by analyzing the relation between output voltage and skin moisture. Android phone exchanges the voltage to skin moisture by the formula, showing the percentage of moisture on screen. Moreover, storing the moisture data in the smartphone. In summary, this wearable tester feature include low-cost, approximately accurate measure, and convenient that potentially used in individual skin care. Advisor Committee Chau-Yun Hsu - advisor
Che-Ho Wei - co-chair
Yen-Wen Chen - co-chair
Files Date of Defense 2016-07-05 Date of Submission 2016-08-16