Simulasi Alat Photoplethysmograph (PPG)
Abstract: Heart is a vital
organ in the human body. The heart functions circulated the blood throughout
the body. The volume of blood in a body organ will vary due to blood pumping by
the heart. Photoplethysmograph (PPG) is a device that can detect changes in
blood volume using optical sensors. The purpose of this research is to make
Photoplethysmograph monitoring system online. That is a device to monitor blood
volume changes and display the change graph. Fluctuations in blood volume
changes are influenced by the rhythm of blood pumping by the heart. Each peak
on the PPG signal is correlated with one heartbeat. Photoplethysmograph charts
can be used to determine the condition and abnormalities of a person's heart.
Photoplethysmograph system online is realized in the form of sensors,
amplifiers, LPF, ADC, and microcontroller as a serial interface, wiz610wi
module, and web applications as online PPG graph viewer. Sensors composed of
red LED and photoresistor (LDR) are placed on the fingers. The rays emitted by
the LEDs are received by the LDR. The signals received by the LDR vary
according to the volume of blood changes. The sensor output signal is then
amplified and filtered. Incoming filter output signal ADC, serial interface by
AT89C2051 then by wiz610wi module transmitted for display and monitored.
Obtained Devices and apps created have worked well. The signal shown is pretty
good, clean of noise. Transmission distance measured up to 70 m with delay less
than 200 ms. The average heart rate calculation was in error 3%
Penulis: Indra Jaya, Wisma
Wisma
Kode Jurnal: jptlisetrodd170382
