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 -
743 views
Technical Discussions
dinesh pal
dinesh pal
09:21 Jan-11-2008
problem in eddy current testing

dear all,
i m facing problem in one ET system that i usually got magnetism effect in the graph.actually i m detecting defect in metal sheet which is steel.I have 3 graph i.e. spall. pinch& magnetism which is seperated by filter ckt.

could anyone suggest me any way to bring me out from this problem


 
 Reply 
 
Elmar van den Elzen
Engineering,
Lismar Engineering B.V., Netherlands, Joined Aug 2000, 15

Elmar van den Elzen

Engineering,
Lismar Engineering B.V.,
Netherlands,
Joined Aug 2000
15
03:36 Jan-12-2008
Re: problem in eddy current testing
Dear Dinesh,

If you have magnetism signals, the first thing to do would be to check if the plate you are testing is really magnetic or not. The best would be to demagnetize the plate with a hand held unit or a demagnetizing tunnel. If you do this properly, your magnetism signals should be gone and you can see if the EC-signal is clean or if still defects are being indicated or not.

Regards, Elmar

----------- Start Original Message -----------
: dear all,
: i m facing problem in one ET system that i usually got magnetism effect in the graph.actually i m detecting defect in metal sheet which is steel.I have 3 graph i.e. spall. pinch& magnetism which is seperated by filter ckt.
: could anyone suggest me any way to bring me out from this problem
------------ End Original Message ------------




 
 Reply 
 
Michael Moles †2014 *1948
, Joined ,
07:35 Jan-13-2008
Re: problem in eddy current testing
----------- Start Original Message -----------
: dear all,
: i m facing problem in one ET system that i usually got magnetism effect in the graph.actually i m detecting defect in metal sheet which is steel.I have 3 graph i.e. spall. pinch& magnetism which is seperated by filter ckt.
: could anyone suggest me any way to bring me out from this problem
------------ End Original Message ------------
Have you considered using an eddy current array? They are much faster - and also give better imaging. I suggest you contact your local Olympus NDT rep.





 
 Reply 
 

Product Spotlight

NEW - TD Focus-ScanRX

The NEW Next Generation Advanced UT platform, TD Focus ScanRX - Also available as a card stack solut
...
ion. Key Improvements 1. Data acquisition is significantly faster than current design 2. Better aesthetic – closely aligns with HandyScan RX 3. Improved IP rating (Target IP66) 4. Ruggedized housing 5. Connectors are protected from impact and ingress 6. Integrated stand and separate retractable handle easy to keep clean) 7. Touchscreen with ruggedized display glass 8. 3-Axis encoder input
>

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

GUL Subsea Solutions - Screeening & Monitoring

To inspect new and existing subsea lines, you need proven technology and experience. GUL offers it's
...
technology to solve this challenge: GUL Subsea and gMAT Transducer Rings.
>

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