녹색광을 이용한 반사형 광용적맥파측정기의 주변광 간섭시 신호측정
The Verification of Photoplethysmography Using Green Light that Influenced by Ambient Light
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참고문헌
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초록
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.
Abstract
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.
참고문헌 (11)
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