Digital Healthcare Monitoring System

Real-time multi-modal physiological monitoring for aging society

WISET Research Program ₩7,000,000 Grant

❤️
Project Overview

As the Principal Investigator of this WISET-funded research program, I am leading the development of a comprehensive wireless healthcare monitoring system designed for the aging society. This system integrates multiple physiological sensors including PPG, Bio-Z, and temperature sensors, with real-time BLE data transmission to a custom Android application.

The project showcases end-to-end system design from FPCB hardware development to deep learning algorithms for on-device signal processing, achieving medical-grade accuracy in vital sign monitoring while maintaining ultra-low power consumption suitable for continuous wearable use.

💓

PPG Monitoring

Real-time heart rate and SpO₂ measurement

📊

Bio-Impedance

Body composition and hydration analysis

🌡️

Temperature

Continuous core body temperature tracking

📱

Mobile App

Android app for real-time visualization

🔧
System Architecture

Hardware

FPCB Design
MAX30102 PPG
AD5933 Bio-Z
nRF52840 SoC

Communication

BLE 5.2
UART Protocol
Real-time Streaming
Low Power Mode

Software & AI

Android Studio
TensorFlow Lite
Signal Processing
TCN Algorithm

📡
Sensor Specifications

PPG Sensor

MAX30102

  • Wavelengths 660/940nm
  • Sample Rate 100 Hz
  • Resolution 18-bit
  • Accuracy ±2% SpO₂

Bio-Z Sensor

AD5933

  • Frequency 1-100 kHz
  • Excitation 2 Vp-p
  • Resolution 12-bit
  • Accuracy 0.5%

Temperature

TMP117

  • Range -55 to 150°C
  • Accuracy ±0.1°C
  • Resolution 0.0078°C
  • Response <1 sec

MCU & BLE

nRF52840

  • Core ARM Cortex-M4
  • Clock 64 MHz
  • RAM/Flash 256KB/1MB
  • BLE Version 5.2

📈
Performance Results

±2%
SpO₂ Accuracy
±3 bpm
Heart Rate
95%
Signal Quality
24h
Battery Life
<100ms
Latency

Heart Rate Accuracy Comparison

SpO₂ Measurement Performance

📱
Mobile Application

Healthcare Monitor
98%
SpO₂
72 bpm
Heart Rate
36.5°C
Temperature

App Features

  • 📊
    Real-time Visualization

    Live graphs and waveforms of physiological signals

  • 💾
    Data Recording

    Continuous logging with cloud synchronization

  • 🔔
    Alert System

    Customizable thresholds for vital sign alerts

  • 🤖
    AI Analysis

    On-device deep learning for arrhythmia detection

🎯
Research Impact & Contributions

1

Principal Investigator

Selected through national competitive process for WISET Research Program. Led grant proposal, team management, and ₩7,000,000 budget administration.

2

System Integration

Designed complete hardware-software ecosystem from FPCB layout to Android app, demonstrating full-stack engineering capabilities.

3

AI Innovation

Implemented Temporal Convolutional Networks (TCN) for real-time PPG signal analysis achieving 95% accuracy in heart rate variability detection.