We have some liquid inside a canister, any size. The challenge is to measure the liquid level inside from zero to 100 percent. However, there are some rules:
1. Can not place any type of device inside the canister
2. Nothing can be placed where the enclosure is filled or drained
3. Can not alter the overall canister shape, size, orientation
My original idea is ultrasonic bounceback from the top of the cylinder. But not knowing the container thickness, will the ultrasonic waves propagate at all?
Any ideas? There is no right or wrong answer.
Cabe
