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Technical Discussions
David Harvey
Engineering
ATI - Wah Chang, USA, Joined Nov 2002, 42

David Harvey

Engineering
ATI - Wah Chang,
USA,
Joined Nov 2002
42
00:38 Jun-24-2003
Tuning networks

I am having some problems with near-surface resolution when using a digital instrument. Transducers that work very well with an analog instrument (USIP12), do not work at all for nsr with my digital system. The digital instrument has only a few limited settings for damping and pulse amplitude. Does anyone manufacture a tuning network to help me overcome this damping/matching problem, so I can test my metal?


 
 Reply 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 528

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
528
08:37 Jun-24-2003
Re: Tuning networks
The USIP-12, though old, is an extremely high performance instrument. Few other sets are comparable. I suspect your problems will be more fundamental than just adding a tuning network! Generally these are only useful on instruments (such as thickness gauges) where there are minimal adjustments.

Joe

: I am having some problems with near-surface resolution when using a digital instrument. Transducers that work very well with an analog instrument (USIP12), do not work at all for nsr with my digital system. The digital instrument has only a few limited settings for damping and pulse amplitude. Does anyone manufacture a tuning network to help me overcome this damping/matching problem, so I can test my metal?
.



 
 Reply 
 
N. Azarov
Engineering
GosNIIGA, Russia, Joined Jan 2000, 12

N. Azarov

Engineering
GosNIIGA,
Russia,
Joined Jan 2000
12
01:11 Jun-25-2003
Re: Tuning networks
: I am having some problems with near-surface resolution when using a digital instrument. Transducers that work very well with an analog instrument (USIP12), do not work at all for nsr with my digital system. The digital instrument has only a few limited settings for damping and pulse amplitude. Does anyone manufacture a tuning network to help me overcome this damping/matching problem, so I can test my metal?
.


Ultrasonic flaw detection USIP-12 is by the device high ray discrimination, which is realized only at performance of three conditions:
1. short 10-20nc a pulse of generator;
2. broadband amplifier 1 - 20MHz;
3. broadband ultrasonic transducer.
It is obvious, that in your digital device the conditions 1 or (and) 2 are not executed.
N. Azarov




 
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