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Technical Discussions
AxlZ W AekZ
R & D
King mongkut's university of technology Thonburi, Thailand, Joined Jun 2001, 16

AxlZ W AekZ

R & D
King mongkut's university of technology Thonburi,
Thailand,
Joined Jun 2001
16
08:21 Apr-13-2002
I have problem with MFL TOOL for wire rope inspection.

I build a MFL tool for wire rope inspecton with coil sensors inside and use electromagnet for magnetizing. A problem is heat when I apply current from battery about 100 A to magnetizing coil. Can I reduce the heat ? Becase of, it destroy my casing and sensors.


    
 
 
Michael Trinidad
Consultant,
LMATS Pty Ltd , Australia, Joined Jan 2003, 138

Michael Trinidad

Consultant,
LMATS Pty Ltd ,
Australia,
Joined Jan 2003
138
04:52 Apr-16-2002
Re: I have problem with MFL TOOL for wire rope inspection.
You could try laminating the magnetic cores of your coils similar to transformers.

But what may be of interest to you was initially MFL rope testers were AC magnetic field operated but to my knowledge could only detect LF (Local Faults) such as broken wires. However after the advent and utilization of powerful rare earth magnets MFL rope testers can detect LF and LMA (Loss of Magnetic Area) faults such as corrosion, wear, thinning etc using a combination of coil and hall effect sensors.


Kindest Regards


Michael Trinidad

: I build a MFL tool for wire rope inspecton with coil sensors inside and use electromagnet for magnetizing. A problem is heat when I apply current from battery about 100 A to magnetizing coil. Can I reduce the heat ? Becase of, it destroy my casing and sensors.
.



    
 
 
AxlZ W AekZ
R & D
King mongkut's university of technology Thonburi, Thailand, Joined Jun 2001, 16

AxlZ W AekZ

R & D
King mongkut's university of technology Thonburi,
Thailand,
Joined Jun 2001
16
07:31 Apr-17-2002
Re: I have problem with MFL TOOL for wire rope inspection.
: I build a MFL tool for wire rope inspecton with coil sensors inside and use electromagnet for magnetizing. A problem is heat when I apply current from battery about 100 A to magnetizing coil. Can I reduce the heat ? Becase of, it destroy my casing and sensors.
.
Dear Sir.
Thank you, for your suggest. I used DC supply(100A. 12V.)not AC supply. Because of,rare magnet in my country is expensive and hard to find. Can I detect LMA fault with coil sensors only? I think tested signal can intigral with sigal conditioning unit. Right?

THank you.

AxlZ W. AekZ




    
 
 
Michael Trinidad
Consultant,
LMATS Pty Ltd , Australia, Joined Jan 2003, 138

Michael Trinidad

Consultant,
LMATS Pty Ltd ,
Australia,
Joined Jan 2003
138
02:00 Apr-18-2002
Re: I have problem with MFL TOOL for wire rope inspection.
Sawadee,

I guess with new computing technology you may be able to differentiate between the signals. I have done a lot of rope testing on mineshafts in Australia and found it to be a very interesting field.

If I can help in anyway please ask.

Kindest Regards


Michael Trinidad
Business Development Manager




    
 
 

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