where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
783 views
Technical Discussions
RS
RS
03:30 Apr-10-2003
Differential Capacitance?

Can anyone point me to some introductory information on how to use (and the basic knowledge behind) differential capacitance sensors? I'm specifically interested in using them for crack-assessment of pipes. Please email me at: russ@ieee.org
Thank you,
R


 
 Reply 
 
Joerg Schulze-Clewing
Joerg Schulze-Clewing
04:12 Apr-11-2003
Re: Differential Capacitance?
Russ, I am not sure what exactly you want to measure
and especially what dimensions the pipes are but if you
want to experiment around a bit maybe this simple
setup would work:

http://www.designnotes.com/CIRCUITS/tiltmeter.htm

If you use something like this it is essential to keep
those diodes as balanced as possible (temp etc.).

Good luck, Joerg.


 
 Reply 
 
R.J.Chaudhari
Director,
CALTECH ENGINEERING SERVICES, India, Joined Mar 2003, 13

R.J.Chaudhari

Director,
CALTECH ENGINEERING SERVICES,
India,
Joined Mar 2003
13
00:55 Apr-11-2003
Differential Capacitance?
Differential capacitance sensors according to information are suitable for thickness measurement and not crack measurement. However laser based techniques can do so. Please check and revert to me at caltech@vsnl.net



 
 Reply 
 

Product Spotlight

Conformable wedge transducer

The conformability is obtained with a flexible membrane filled with water between the transducer and
...
the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation.
>

UCI Hardness Tester NOVOTEST T-U2

UCI hardness tester NOVOTEST T-U2 is is used for non-destructive hardness testing of: metals and
...
alloys by scales of hardness: Rockwell (HRC), Brinell (HB), Vickers (HV); non-ferrous metals, alloys of iron etc., and using five additional scales for calibration; with tensile strength (Rm) scale determines the tensile strength of carbon steel pearlitic products by automatic recalculation from Brinell (HB) hardness scale.
>

Sci Aps Z-Series Portable Handheld Analysers

The world’s only handheld analyzer that measures carbon content in stainless (yes even L-grades),s
...
teels, and cast irons. Also accepted for low Si analysis for sulfidic corrosion analysis, and is widely used in the power industry for Cr analysis, for flow accelerated corrosion applications.
>

32:128PR PAUT & 2-ch TOFD Flaw Detector: SyncScan 2

●32:128PR PAUT with optional 2-ch TOFD to maximize your efficiency ●Support PR mode for corrosi
...
on inspection ●Multiple solutions for welds & corrosion ●Faster scan speed (Approximately 3 meters/minute) ●Light weight: 4kg only including battery
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window