Distance Measurement, by ultrasound echo
Objective
Measure distance by measuring the time taken by pulse train to
echo from a hard surface.
Procedure
- Keep a flat surface, like a cardboard sheet, around 10 cm from the echo module
- Press START
- Change the distance with time
Discussion
The distance is calculated from the time taken by a burst of sound to echo from the surface kept in front of the module. The distance can be measred as function of time, enabling to calculate velocity, acceleration etc.