Pulse Echo Technique Flashcards
1
Q
What is the aim of the pulse echo technique?
A
To determine the distance to an object using pulses
2
Q
What are the steps when using the pules echo technique?
A
- Pulse is sent
- Reflected from object
- Returns as an echo
- Time between emission and return of pulse is measured as t
- distance = wave speed x t/2
3
Q
How long should the pulse duration be and why?
A
Less than the time between emission + return of pulse. This ensures the pulse has finished being emitted before echo returns to avoid interference with the receiver.
