مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

اندازه‌گیری ضربان قلب به کمک سیگنال فوتوپلتیسموگرافی تصویری با استفاده از گوشی هوشمند

نوع مقاله : پژوهشی اصیل

نویسندگان
گروه مکانیک، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
چکیده
اندازه‌گیری علایم حیاتی بدن مثل درصد اکسیژن خون، فشار خون و ضربان قلب مهم‌ترین و ابتدایی‌ترین مرحله برای تشخیص انواع بیماری‌ها به‌خصوص بیماری‌های قلبی و عروقی به شمار می‌رود. روش‌های گوناگونی برای اندازه‌گیری این علایم مطرح شده است. به‌طور کلی این روش‌ها به دو دسته تهاجمی و غیرتهاجمی تقسیم‌بندی می‌شوند. به‌دلیل آسیب‌های کمتر روش‌های غیرتهاجمی، استفاده از آنها در چند دهه‌ اخیر بیشتر مورد توجه قرار گرفته است. استفاده از تلفن همراه به‌علت دسترسی آسان و فراگیربودن از مطرح‌ترین روش‌های غیرتهاجمی است. در این مقاله پس از مطالعه و بررسی روش‌های فوتوپلتیسکوگرافی و بیان تئوری‌های مربوط به آن روش فوتوپلتیسکوگرافی تصویری برای اندازه‌گیری میزان ضربان قلب به کار گرفته شده است. با توجه به دو الگوریتم‌ پیشنهادی بر مبنای تبدیلات فوریه و محاسبه‌ قله‌ سیگنال، پیاده‌سازی از این الگوریتم‌ها با استفاده از دوربین تلفن همراه و ال‌ای‌دی آن روی ۲۰ نفر انجام شده است. در گام بعد، میزان ضربان قلب استخراج شده است. در نهایت، مقایسه‌ای بین دو روش انجام شده است که نتایج حاصل از این مقایسه بیان می‌کند که روش محاسبه قله، خطای کمتری نسبت به روش تبدیل فوریه دارد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Heart Rate Measurement with Imaging Photoplethysmography Signals Using Smart Phone

نویسندگان English

M.S. Sokout
S.H. Heidary
B. Beigzadeh
Mechanical Department, Mechanical Engineering Faculty, Iran University of Science & Technology, Tehran, Iran
چکیده English

Measuring the vital signs of human body, such as oxygen saturation, blood pressure, and heart rate is the greatest and basic stage of the diagnosis of various diseases, especially cardiovascular diseases. Various methods have been developed to measure these signs. In general, these methods are divided into invasive and non-invasive categories. Due to less damages of non-invasive methods, more attention has been paid to them in recent decades. Using mobile phone is one of the most important non-invasive approaches because of being common and accessible among people. In this article, after studying Photoplethysmographic methods and expressing theories related to this method, imaging photoplethysmography (IPPG) is used to measure heart rate. Regarding two proposed algorithms based on furies transfer and peak detection, implementation of these algorithms was done, using a camera and LED of smart phone on 20 people. Next, the heart was calculated. Finally, a comparison was made between the two methods, the results of which show that peak detection method has less error than furies transfer method.



کلیدواژه‌ها English

Heart rate
Non-invasive method
IPPG signals
Smart phone
Furies transfer
Peak detection
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