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Technical Discussions
sreemoy
India, Joined Oct 2011, 6

sreemoy

India,
Joined Oct 2011
6
20:12 Jun-16-2013
transducer construction( Manaul UT)

Why circular dia. transducer are used in normal (0 degree) probes & rectangular transducer in angle probes?
Also what is the shape of the transducer in T-R probe?

Please reply ,
Thank you

 
 Reply 
 
Wiesław Bicz
Engineering,
PBP Optel sp. z o.o., Poland, Joined Feb 2009, 276

Wiesław Bicz

Engineering,
PBP Optel sp. z o.o.,
Poland,
Joined Feb 2009
276
10:49 Jun-17-2013
Re: transducer construction( Manaul UT)
In Reply to sreemoy at 20:12 Jun-16-2013 (Opening).

It is mostly, because circular shape is more convenient to manufacture and to handle.
In all types of probes.

 
 Reply 
 
sreemoy
India, Joined Oct 2011, 6

sreemoy

India,
Joined Oct 2011
6
07:15 Jun-20-2013
Re: transducer construction( Manaul UT)
In Reply to Wiesław Bicz at 10:49 Jun-17-2013 .

ok.
i have got the similar from other persons working in my company . But the why dont they manufacture circular shap for angle probe ?

Also what is the shape of the transducer in T-R probe?

 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
14:56 Jun-20-2013
Re: transducer construction( Manaul UT)
In Reply to sreemoy at 07:15 Jun-20-2013 .

Angle beam transducers with circular elements most certainly do exist. We sell a lot of them, as do our friends at GE. I suspect that they may be more commonly used in North America than Europe or Asia, so perhaps that is why you have not encountered them in India.

As for T-R (dual element) transducers, the elements are commonly D-shaped so that two of them fit into a round case, although duals with rectangular elements also exist.

1
 
 Reply 
 
Andrew Hurrell
Consultant, Ultrasonic Transducer Production
Precision Acoustics Ltd, United Kingdom, Joined Apr 2000, 25

Andrew Hurrell

Consultant, Ultrasonic Transducer Production
Precision Acoustics Ltd,
United Kingdom,
Joined Apr 2000
25
15:08 Jun-27-2013
Re: transducer construction( Manaul UT)
In Reply to Tom Nelligan at 14:56 Jun-20-2013 .

I also wonder whether this may also be related to the geometry of the wedge of an angled probe. A circular element will have edges waves propagating from the periphery of the active element - and thus there will be a range of times of flight as edge wave interacts with the plane surface on the side of the wedge. This _may_ lead to some unusual interference patterns. In contrast a rectangular element will have an edge wave that is parallel to the side of the wedge and thus all reflections exhibit the same time of flight.

That said - I'm not sure that one of these is more desirable than the other ...

 
 Reply 
 
sreemoy
India, Joined Oct 2011, 6

sreemoy

India,
Joined Oct 2011
6
16:28 Jun-27-2013
Re: transducer construction( Manaul UT)
In Reply to Tom Nelligan at 14:56 Jun-20-2013 .

Mr. Tom Nelligan, since you belong to company who actually manufactures UT probes could be more elaborate on use of circular & rectangular transducer .

Why in north america specially they are use ? because i have never come across those probe till please specify the details if you can .

Thank you.

 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
19:16 Jun-27-2013
Re: transducer construction( Manaul UT)
In Reply to sreemoy at 16:28 Jun-27-2013 .

Mr. Sreemoy, there is little that I can add to what I wrote above. I suspect that it is largely a matter of history and custom. We offer both round and rectangular styles and the round probes are sold primarily in North America. In most applications either type will work well in the hands of a trained inspector.

 
 Reply 
 

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