Non-Contact Vital Signal Sensor Based on Impedance Variation of Resonator 


Vol. 38,  No. 9, pp. 813-821, Sep.  2013


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  Abstract

In this paper, a vital signal sensor based on impedance variation of resonator is presented. Proposed vital signal sensor can detect the vital signal, such as respiration and heart-beat signal. System is composed of resonator, oscillator, surface acoustic wave (SAW) filter, and power detector. The cyclical movement of a dielectric such as a human body, causes the impedance variation of resonator within the near-field range. So oscillator’s oscillation frequency variation is effected on resonator’s resonant frequency. SAW filter’s skirt characteristic of frequency response can be transformed a small amount of frequency deviation to a large variation. Aim to enhance the existing sensor detection range, proposed sensor operates in 870 MHz ISM band, and detect respiration and heart-beat signal at distance of 120 mm.

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  Cite this article

[IEEE Style]

K. Kim, S. Kim, Y. Hong, J. Yook, "Non-Contact Vital Signal Sensor Based on Impedance Variation of Resonator," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 9, pp. 813-821, 2013. DOI: .

[ACM Style]

Kee-yun Kim, Sang-Gyu Kim, Yunseog Hong, and Jong-Gwan Yook. 2013. Non-Contact Vital Signal Sensor Based on Impedance Variation of Resonator. The Journal of Korean Institute of Communications and Information Sciences, 38, 9, (2013), 813-821. DOI: .

[KICS Style]

Kee-yun Kim, Sang-Gyu Kim, Yunseog Hong, Jong-Gwan Yook, "Non-Contact Vital Signal Sensor Based on Impedance Variation of Resonator," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 9, pp. 813-821, 9. 2013.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880