Abstract
Workplace accidents involving machinery are often linked to operator impairment. Alcohol detection at the point of machine access, combined with automatic power interlock, provides a practical engineering solution for improving industrial safety.
This project develops a Factory Worker Alcohol Detector with Automatic Machine Shutdown. An alcohol gas sensor (typically MQ-3 or equivalent) measures breath or ambient alcohol concentration. The signal is conditioned and processed by a microcontroller or PLC. When the concentration exceeds a calibrated threshold, the controller de-energizes a relay/contactor feeding the machine, activates a buzzer and status indicator, and optionally logs or displays the event. The system demonstrates sensor-based safety interlocks, control logic and industrial panel practice suitable for academic evaluation.
It is an excellent final-year project for Electrical, Electronics, Mechatronics and Industrial Automation Engineering students, combining sensing, control and occupational safety applications.
