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Single Ping Ultrasonic Scene Mapping


Bats are capable of navigating complex cave-like environments with the use of ultrasonic echolocation. Taking inspiration from this we attempt to sense the location of nearby objects using an ultrasonic transmitted and an array of ultrasonic receivers followed by spatiotemporal filtering.


The project differs from conventional SONAR because we use only a single ultrasonic ping to map the environment rather than scanning the environment with a steerable beam. On the receiving end the bearing is determined using spatiotemporal filtering implemented with analog circuitry. The filters operate continuously in parallel, thus allowing us to handle overlapping echoes and determine the location of multiple objects per ping.


We aim to develop the system into a compact, lightweight, low-power, flyable sensor to aid with navigation of a micro-Unmanned Aerial Vehicle in indoor environments.