Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Development of Pressure Sensor on Polymer Substrate for Real-time Pulse and Blood Pressure Measurements

실시간 맥박 및 혈압 측정을 위한 폴리머 기판 압력센서 개발

  • Kim, Jin-Tae (Department of Electronics and Control Engineering, Hanbat National University) ;
  • Kim, Sung Il (Department of Electronics and Control Engineering, Hanbat National University) ;
  • Joung, Yeun-Ho (Department of Electronics and Control Engineering, Hanbat National University)
  • 김진태 (국립한밭대학교 전자제어공학과) ;
  • 김성일 (국립한밭대학교 전자제어공학과) ;
  • 정연호 (국립한밭대학교 전자제어공학과)
  • Received : 2013.07.26
  • Accepted : 2013.08.08
  • Published : 2013.09.01
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Abstract

In this study, we introduce a polymer(polyimide) based pressure sensor to measure real-time heart beat and blood pressure. The sensor have been designed with consideration of skin compatibility of material, cost effectiveness, manufacturability and wireless detection. The designed sensor was composed of inductor coils and an air-gap capacitor which generate self-resonant frequency when electrical source is applied on the system. The sensor was obtained with metalization, etching, photolithography, polymer adhesive bonding and laser cutting. The fabricated sensor was shaped in circular type with 10mm diameter and 0.45 mm thickness to fit radial artery. Resonant frequencies of the fabricated sensors were in the range of 91~96 MHz on 760 mmHg pressurized environment. Also the sensor has good linearity without any pressure-frequency hysteresis. Sensitivity of the sensor was 145.5 kHz/mmHg and accuracy was less than 2 mmHg. Real-time heart beat measurement was executed with a developed hand-held measurement system. Possibility of real-time blood pressure measurement was showed with simulated artery system. After installation of the sensor on skin above radial artery, simple real blood pressure measurement was performed with 64 mmHg blood pressure variation.

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References

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