# Ultrasonic time of flight
# Scope: Pulse round-trip range at supplied sound speed; no multipath.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

roundTrip = 2 ms
soundSpeed = 343 m/s

distance := soundSpeed*roundTrip/2 [mm]

check distance range budget: distance <= 500 mm

scenario alternative: roundTrip = 1.6 ms