Simultaneous measurement of oxygen permeability by using of multi-functional oxygen electrode

다기능 산소전극에 의한 산소투과특성 동시측정

  • 이동희 (수원대학교 전기전자공학부) ;
  • 정진휘 (수원대학교 전기전자공학부) ;
  • 유형풍 (수원대학교 전기전자공학부) ;
  • 김태진 (수원대학교 전기전자공학부)
  • Published : 2000.07.01


We have fabricated a sensor system for on-line monitoring the oxygen permeability and diffusivity of six different polymer films using the miniaturized 6 cathode(Ag)-single anode(Ag/AgCl) type hexagonal oxygen electrode. This system consists of multiple input front-end electronics, signal conditioning circuit using the embedded microcontroller 80C196KC, PC interface circuit and PC with the OS for microcontroller and the operating program for this system. The digital low-[ass filter was programmed and the simulated filter characteristics were enough to eliminate the noise from sensor signal. According to the experimental results, the linearity coefficients of the output voltage to oxygen partial pressure for each sensor electrode of six cathode type oxygen sensor are 0.998, 0.997, 0.998, 0.997, 0.997, 0.997 respectively, and the response times are all within 4 minutes.