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Ultrasonic Sensor in a pipe

S

Sara

Jan 1, 1970
0
Dear friends:
I have designed an ultrasonic range meter for measuring the surface of
a liquid in a tank.
the height of tank to be measured is about 3meters.the
sensors'(transmitter and receiver) have 60 degrees directivity but I
improve it somehow using tow horns one for transmitter and the other
for receiver.
The problem is I should place the sensors in a tube along the tank's
height .Does the tube's wall affects the main echo or is there any
special material that absorbs(and not reflects) ultrasound which can be
used for making the tube. what size is suitable for the diameter of
tube? what do you recomend for avoiding these probable unwanted echos?
 
G

Geraldo

Jan 1, 1970
0
My guess:

If you are using a straight-walled tube, the first signal recieved
should be from a straight line from the emitter to the tank liquid
surface, then bounced back to the receiver.

If the tank liquid has foam on top...would you still get an accurate
signal reflection?

Make sure you have another backup overflow protection if you are using
this to fill a tank.
 
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