Project 2 Heart Rate Project 2 Heart Rate Monitoring During Monitoring During Physical Exercise Physical Exercise

Christian ChipourasAnthony D’Onofrio

Kyle Sexton

What is Photoplethysmogram? What is Photoplethysmogram?

Uses light to detect volume in an organUses pulse oximeter

◦With LED ◦Measures the difference in the intensity of the

light reflected from the skin Just as accurate as ECG

Diastolic

Our DeviceOur DeviceImplementing Finger PPG

◦Understand the Circuit and SoftwareWrist Type PPG

◦Using ultra bright LED’s on arteries◦Sensors on forearm◦Using PIC Processor to filter noise.

◦X[n] –((x[n+1] – x[n-1]) / 2)

IEEE Competition IEEE Competition

Create Matlab Script to get best signal to noise ratio of PPG signals

Given accelerator data, ECG of Chest, PPG of Wrist

Using adaptive and least mean square signal processing techniques to filter noise

Could use HAPPEE or Autocorrection ◦Highly Accurate Pulse Predictor for Exercise

Equipment

Block Diagram of Adaptive FilterBlock Diagram of Adaptive Filter

H

- S + No

+ZΣ

S = signal corrupted with unwanted noise, NoN1 = reference input noise component with accelerator dataH = transfer function Y = OutputZ = System Output

N1

Y

References References

[1] Kay, Steven, “On the Design and Implementation of Highly Accurate Pulse Predictor for Exercise Equipment” IEEE, 2014. Journal. 25 Sept. 2014. [2] Nakano, Masanao, Instantaneous Heart Rate Detection Using Short-Time Autocorrelation for Wearable Healthcare Systems IEEE, 2014 Journal. 25 Sept.2014 [3] Tamura, Toshiyo, “Wearable Photoplethysmographic Sensors—Past and Present.” Electronic Journal. 15 April 2014. Journal. 19 September. 2014.  [4] Zhang, Zhilin. "2015 IEEE Signal Processing Cup." 2015 IEEE Signal Processing Cup. IEEE, 2014. Web. 10 Sept. 2014.