Project ThermBand

Our Product

ThermBand is a battery-efficient smart device designed to protect workers in extreme heat environments, such as construction sites. Worn around the side of the ribs, it monitors heart rate, body temperature, and ambient temperature in real-time. Using this data, the system calculates the Heat Index and the Physiological Strain Index. If safety thresholds are breached, it triggers immediate audible and vibrational alerts to prevent heat exhaustion. All shift data is stored internally and transferred via USB-C to a desktop application, which automatically syncs with a web Dashboard for long-term health monitoring and risk analysis.

The Problems

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Rising Temperatures

Climate change is causing more frequent and intense heatwaves, creating hazardous working conditions in construction, agriculture, and manufacturing.

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Self-Reported Risk

Current methods like self-reporting and basic skin temperature checks are not accurate enough to catch health crises before they happen. Because they don't reflect core body temperature, critical interventions are often delayed.

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Invasive Existing Solutions

Existing solutions like Bodytrak (ear-based) are invasive and conflict with safety helmets. They can impede site communication and generally face lower worker acceptance in industrial settings.

Our Solution

ThermBand tackles heat stress with a non-invasive armband. By combining clinical-grade I2C sensors with a Kalman Filter-based algorithm on the XIAO ESP32-C6, it calculates core temperature and the Physiological Strain Index (PSI) to alert users before exhaustion.

Real-time alerts via buzzer and vibration motor
Clinical-grade heart rate & skin temperature via I2C sensors
3-axis accelerometer for physical effort context
End-of-shift USB-C data export to WebApp dashboard

The Wearable

Engineered for efficiency, accuracy and reliability in harsh work environments.

Microcontroller

XIAO ESP32-C6 with 4 MB internal Flash. Features advanced power management for 8h-10h shifts and robust handling of the I2C bus for the expanded clinical sensor array.

Sensors

Clinical-grade skin temperature (±0.1 °C) and heart rate (±2 bpm) sensors plus a 3-axis ADXL accelerometer — all communicating via I2C.

Connectivity

Data is transferred at end-of-shift via USB-C cable to a PC. No wireless transmission during the shift ensures maximum battery autonomy.

Battery & Weight

Lightweight LiPo cell (total weight < 100g) with 8-10 hours of autonomy. Energy conservation strategy uses RTC memory and batch-writing to Flash to minimize consumption and extend hardware lifespan.