標題: Toward a Wirelessly Powered On-Lens Intraocular Pressure Monitoring System
作者: Chiou, Jin-Chern
Hsu, Shun-Hsi
Liao, Yu-Te
Huang, Yu-Chieh
Yeh, Guan-Ting
Kuei, Cheng-Kai
Dai, Kai-Shiun
電機工程學系
電控工程研究所
Department of Electrical and Computer Engineering
Institute of Electrical and Control Engineering
關鍵字: Capacitance-to-digital converter (CDC);capacitive sensor;soft contact lens;UHF RFID Class1 Gen2
公開日期: 1-九月-2016
摘要: This paper presents a wireless on-lens intraocular pressure monitoring system, comprising a capacitance-to-digital converter and a wirelessly powered radio-frequency identification (RFID)-compatible communication system, for sensor control and data communication. The capacitive sensor was embedded on a soft contact lens of 200 mu m thickness using commercially available biocompatible lens material, to improve compliance and reduce user discomfort. The sensor chip was shown to achieve effective number of bits greater than 10 over a capacitance range up to 50 pF while consuming only 64-mu W power. The on-lens capacitive sensor could detect dielectric variation caused by changes in water content from a distance of 2 cm by using incident power from an RFID reader at 20 dBm. The maximum detectable distance was 11 cm with 30-dBm incident RF power. The rise in eye tissue temperature under 30-dBm RF exposure over an interval of 1 s was simulated and found to be less than 0.01 degrees C.
URI: http://dx.doi.org/10.1109/JBHI.2016.2594058
http://hdl.handle.net/11536/145595
ISSN: 2168-2194
DOI: 10.1109/JBHI.2016.2594058
期刊: IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
Volume: 20
顯示於類別:期刊論文