MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202631044740 A) filed by Bhakti Prasad Biswal; and Satyabrat Sahoo, Patna, Orissa, on April 8, for 'smart wearable ultrasonic navigation aid using zonebased spatial mapping.'
Inventor(s) include Bhakti Prasad Biswal; and Satyabrat Sahoo.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention discloses a smart wearable ultrasonic navigation aid integrated into a lightweight three-dimensionally printed glasses frame, designed to enhance spatial awareness and independent mobility for visually impaired individuals by detecting obstacles and delivering precise, zone-specific audio feedback in real time. The system employs nine HC-SR04 ultrasonic sensors arranged in a three-by-three spatial grid that covers approximately 180 degrees horizontally and 120 degrees vertically, segmenting the user's forward environment into nine distinct spatial zones designated as Top-Left, Top-Center, Top-Right, Middle-Left, Middle-Center, Middle-Right, Bottom-Left, Bottom-Center, and Bottom-Right. An Arduino Mega 2560 microcontroller processes the sensor data within continuous detection cycles of 60 to 100 milliseconds, applying a rolling-buffer stability filter with a window size of K equals three and a Stable Count threshold of two to eliminate false-positive alerts caused by transient noise or environmental interference. Active zones are ranked using a predefined priority weight array that reflects the relative navigational hazard of each spatial position, and adjacent active zones are merged into consolidated cluster alerts to reduce cognitive load on the user. A DFPlayer Mini MP3 module retrieves pre-recorded directional audio files from a MicroSD card and delivers them to the user through bone conduction headphones, which transmit audio vibrations through the skull bones directly to the cochlea while leaving the ear canal fully open for ambient sound perception. A rate-limiting mechanism prevents repetitive alert playback within a 1500-millisecond interval, and the entire system is powered by a compact rechargeable lithium polymer battery for portable, hands-free, camera-free, and internet-independent operation suitable for daily navigational use across diverse indoor and outdoor environments."
Disclaimer: Curated by HT Syndication.
