지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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The purpose of this study is to verify the utility of reflected photoplethysmography sensor using two greenlight emitting diodes that influenced by ambient light. Recently it has been studied that green light emitting diodeis suitable for light source of reflected photoplethysmography sensor at low temperature and high temperature.
Another study showed that, green light is better for monitoring heart rate during motion than led light. However,it has a bad characteristic about ambient light noise. To verify the utility of reflected photoplethysmography sensorusing green light emitting diode, this study measures the photoplethysmography signal that is distorted by ambientlight and will propose a solution. This study has two parts of research method. One is measurement system thatcomposed sensor and board. The sensor is made up PE-foam and Non-woven fabric for flexible sensor. The photoplethysmographysignal is measured by measurement board that composed high-pass filter, low-pass filter andamplifier. Ambient light source is light bulb and white light emitting diode that has three steps brightness. Photoplethysmographysignal is measured with lead II electrocardiography signal at the same time and it is measuredat the finger and radial artery for 1 minute, 1000 Hz sampling rate. The lead II electrocardiography signal is a standardsignal for heart rate and photoplethysmography signal that measured at the finger is a standard signal for waveform.
The test is repeated 3 times using three sensor. The data is processed by MATLAB to verify the utility by comparingthe correlation coefficient score and heart rate. The photoplethysmography sensor using two green light emittingdiodes is shown better utility than using one green light emitting diode and red light emitting diode at the ambientlight. The waveform and heart rate that measured by two green light emitting diodes are more identical than others.
The amount of electricity used is less than red light emitting diode and error peak detectability factor is the lowest.
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참고문헌 (11)
참고문헌 신청
/ / WHO
A. Reisner / 2008 / Utility of the photoplethysmogram in circulatory monitoring / Anesthesiology 108 : 950 ~ 958
Asada, H. H. / 2003 / Mobile monitoring with wearable photoplethysmographic biosensors / IEEE Eng. Med. Biol. Mag 22 : 28 ~ 40
Challoner AVJ / 1979 / Photoelectric plethysmography for estimating cutaneous blood flow Non-Invasive Physiological Measurements / Academic Press London : 125 ~ 151
Cui W J. / 1990 / In vivo reflectance of blood and tissue as a function of light wavelength / IEEE Trans. BME 37 : 632 ~ 639
A. Reisner / 2008 / Utility of the photoplethysmogram in circulatory monitoring / Anesthesiology 108 : 950 ~ 958
Asada, H. H. / 2003 / Mobile monitoring with wearable photoplethysmographic biosensors / IEEE Eng. Med. Biol. Mag 22 : 28 ~ 40
Challoner AVJ / 1979 / Photoelectric plethysmography for estimating cutaneous blood flow Non-Invasive Physiological Measurements / Academic Press London : 125 ~ 151
Cui W J. / 1990 / In vivo reflectance of blood and tissue as a function of light wavelength / IEEE Trans. BME 37 : 632 ~ 639
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