HeatMind Wearable Prototype

Shovito Barua Soumma
Last updated on Sep 28, 2026
Project
HeatMind wearable prototype secured to a forearm with electrode leads
Forearm-worn HeatMind research prototype.
Labeled HeatMind prototype electronics including the controller, ECG and BioZ board, battery, and power switch
Controller, physiological sensing board, battery, and power assembly.

HeatMind is a wearable biomedical sensing prototype for studying physiological responses to heat exposure and physically demanding work. The current system integrates optical photoplethysmography (PPG), bioimpedance and ECG capability, and six-axis inertial sensing on a compact nRF52840 platform.

HeatMind sensing and BLE data path from PPG, bioimpedance, and inertial sensors through the wearable controller to MATLAB
Synchronized PPG, BioZ, and movement signals are processed on the wearable node and transmitted to MATLAB over Bluetooth Low Energy.

Biomedical signal pipeline

ModalityMeasurementSignal-processing role
Optical PPGInfrared pulse waveform and beat intervalsHeart-rate estimation and pulse signal-quality assessment
Bioimpedance / ECGTissue resistance and reactance with ECG capabilityPhysiological monitoring using in-phase and quadrature measurements
Six-axis IMUThree-axis acceleration and angular velocityActivity context and identification of motion-corrupted intervals

The sensing channels are time-aligned on the wearable node and transmitted over Bluetooth Low Energy to MATLAB for live visualization, logging, and offline signal-quality analysis. The prototype currently demonstrates multimodal sensor integration, wearable packaging, and repeatable data acquisition.

HeatMind is a research prototype and is not a medical device.

Biomedical Engineering Wearable Sensors Signal Processing PPG Bioimpedance ECG IMU Heat Strain
Shovito Barua Soumma
Shovito Barua Soumma
Graduate Research Associate
PhD Candidate

Currently I am working on building and optimizing deep learning models for wearable sensors data.