Safety mask
Active fan-driven filtering firmware for a safety mask protecting workers from asbestos and fine particles. Guarantees minimum filtered airflow under load.
The challenge
Workers in hazardous environments need guaranteed clean airflow. Passive masks fail under heavy breathing loads, and existing powered masks had no feedback loop to ensure minimum safe airflow rates.
Confidential
4 months
Erwin (lead) + Bob
Firmware and sensor integration
Our approach
Sensor integration
Integrated pressure differential sensors and flow meters to measure real-time airflow through the filter media.
Control algorithm
Developed a PID-based fan control system that maintains minimum safe airflow regardless of breathing patterns or filter clogging.
Safety certification
Designed the firmware with fail-safe modes and alarm thresholds aligned with occupational safety standards.