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 |