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- 저자 : Lindly Van S. Medrano (검색결과 1 건)
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Low-Cost Photoplethysmographic Circuit for Heart Rate Measurement
Reisha Claffel Z. Ferraren,Lindly Van S. Medrano 국제과학영재학회 2016 APEC Youth Scientist Journal Vol.8 No.1
Heart rate measurement helps in assessing the condition of the cardiovascular system. Today, there are many other methods to measure heart rates such as Phonocardiogram, ECG, blood pressure wave form, and pulse meters but these methods are clinical and expensive. Because of these, a need exists for cheap sensing devices that can measure pulse in an accurate but much easier way. In this study, a low-cost photoplethysmographic circuit was fabricated with the use ofLM358 Operational Amplifier, photodiode, infrared LED, resistors, and potentiometers. The heartbeats per minute of five volunteers were recorded. Three trials were done per volunteer. Data showed that the average heartbeats per minute for the five volunteers with standard deviations are 67.33 ± 1.53, 63.00 ± 2.00, 65.67 ± 2.52, 70.33 ± 1.53, and 65.33 ± 1.53 respectively. The fabricated circuit successfully measured the heart rates of five people. The experiment established the potential of low-cost do-it-yourself photoplethysmographic circuits as alternatives to the expensive medical heart rate devices currently being used in hospitals and clinics.
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