Smart Glasses for the Blind

Technical Objective

The objective was the engineering of a low-latency assistive device to provide real-time spatial awareness for visually impaired users. The system leverages haptic or acoustic feedback to translate distance data into intuitive environmental telemetry.

Hardware Specification

The platform utilizes an HC-SR04 ultrasonic transducer group mounted to a standard eyewear chassis. The sensor is interfaced with a microcontroller that executes high-frequency distance polling, calculating object proximity based on time-of-flight acoustic reflection.

• Sensor Suite: Ultrasonic distance transducer.
• Physical Interface: Integrated micro-acoustic driver.
• Feedback Protocol: Pulse-frequency modulation (PFM) — beep frequency increases linearly as distance to the primary obstacle decreases.

System Integration

The electronics package was engineered for minimal volumetric displacement to maintain wearer ergonomics. The wiring harness was iterative, transitioning from loose-cable routing to a more rigid, integrated structural path along the frame arms to ensure long-term mechanical reliability.

Operational Assessment

The PFM feedback loop successfully validated the "acoustic-haptic" transition model for spatial navigation. While the single-sensor configuration provided reliable axial detection, the platform's primary constraint is a limited field-of-view (FoV). Subsequent iterations would require a phased-array sensor topology to provide comprehensive peripheral awareness.