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자료유형
학술저널
저자정보
저널정보
한국센서학회 센서학회지 센서학회지 제26권 제2호
발행연도
2017.1
수록면
141 - 147 (7page)

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A pressure sensor in pulse measurement system is a core component for precisely measuring the pulse waveform of radial artery. A pulse sensor signal that measures the pulse wave in contact with the skin is affected by the temperature difference between the ambient temperature and skin surface. In this study, we found experimentally that the signal changes of the pressure sensors and a temperaturesensor were caused by the temperature of the wrist surface while the pressure sensor was contacted on the skin surface for measuringpulse wave. To observe the signal change of the pulse sensor caused by temperature increase on sensor surface, Peltier device that can be kept at a set temperature was used. As the temperature of Peltier device was kept at 35°C (the maximum wrist temperature), thedevice was put on the pulse sensor surface. The temperature and pressure signals were obtained simultaneously from a temperature sen-sor and six pressure sensors embedded in the pulse sensor. As a result of signal analysis, the sensor pressure was decreased during tem- perature increase of pulse sensor surface. In addition, the signal difference ratio of pressure and temperature sensors with respect tothickness of cover layer in pulse sensor was increased exponentially. Therefore, the signal of pressure sensor was modified by the com-pensation equation derived by the temperature sensor signal. We suggested that the thickness of cover layer in pulse sensor should be designed considering the skin surface temperature.

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