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 -

722 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


    
 
 
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.


    
 
 
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



    
 
 

Product Spotlight

NEW! The PragmaPro Instrument Platform

The PragmaPro is based on a modular cartridge technology and supports various NDT instrument modal
...
ities such as UT, PAUT, ECT and many more. This new platform is based on a machined, powder-coated aluminum frame for shock-proofness, best sealing qualities and maximum heat dissipation. This is practical to extend the outdoor temperature range and/or to extend the power injected in the transducers. The PragmaPro is aiming at a very wide range of applications, such as weld scanning, corrosion mapping and composite testing.
>

NDT Master Lecturer

In the program both university professors and practitioners will give lectures, which guarantees the
...
oretical depth and practical inside. Academic Director: Prof. Dr. Christian Boller
The following lecturers are not complete: Prof. Tadeusz Stepinski, Prof. Wieslaw Staszewski, Prof. Frank Walther, Prof. Giovanni Bruno, Prof. Gerd Dobmann, Prof. Philippe Guy
>

PROlineTOP Plug & Play Ultrasonic inspection device

As Plug & Play solution it units all control and operation elements in a small housing and therefo
...
re replaces the typical control cabinet...
>

SONOAIR - air-coupled Phased Array Ultrasonic Inspection System

For highly attenuating materials, the performance of the system is critical. The ultrasonic sensors,
...
the scanning area and the system settings should be flexibly adapted to the test task and the material. These high expectations are met with the new and modular testing system SONOAIR. With the world’s first air-coupled phased-array UT inspection system SONOAIR we developed a technology that works with up to 4 transmitter and receiver channels with freely configurable square wave burst transmitters as wells as low noise receiving amplifiers.
>

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