Ultrasonic distance measurement is old hat, it relies on time-of-flight measurements of ultrasonic pulses. This is commonly seen in cars for parking aid or in industrial applications for part detection, etcetera.
While getting the distance to the nearest object is nice for this, why not go a step further? There are projects which create volumetric data by scanning with a single sensor an stepper motors. This works but is slow. It should be possible to create volumetric data of a large room without the need to move the sensor mechanically: What I'm thinking of is ultrasonic interferometry.
What's needed is not a single sensor but a sensor array.
I will be working on three major topics:
- theoretical background
- analogue data aquisition
- analysis of data