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589 views
02:02 Sep-16-2000
Mirham Abdallah Barakat
relation between the gain of the pulser-receiver and the echo amplitude

I had made experiment showing the echo amplitude from a cylidrical
hole against the distance of the hole from the transducer
for various gain and the results showed that the echo amplitude
is inversely proportion to the gain but i haven't explanation
for this phenomena. Please if you have explanation
send it to me.

Thank you
Mirham



 
09:10 Sep-18-2000
Dipl.-Ing. Martin Heinz
Re: relation between the gain of the pulser-receiver and the echo amplitude : I had made experiment showing the echo amplitude from a cylidrical
: hole against the distance of the hole from the transducer
: for various gain and the results showed that the echo amplitude
: is inversely proportion to the gain but i haven't explanation
: for this phenomena. Please if you have explanation
: send it to me.

: Thank you
: Mirham

Dear Mirham,

if you work with very high gain and the signal amplitude of the echo is very large it is possible that the receiver amplifier goes into saturation. In This case the echo seembs to be smaller.
Try reducing gain and look what happens.

Best regards,

Martin.



 
09:17 Sep-18-2000

Udo Schlengermann

Consultant, -
Standards Consulting,
Germany,
Joined Nov 1998
174
Re: relation between the gain of the pulser-receiver and the echo amplitude s gain and the results showed that the echo amplitude
: is inversely proportion to the gain but i haven't explanation
: for this phenomena. Please if you have explanation
: send it to me.

: Thank you
: Mirham




 


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