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LECOEUR ELECTRONIQUE
The Specialist of electronics for ultrasonic testing
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Technical Discussions
Alvaro
Engineering,
FURG, Brazil, Joined Mar 2020, 5

Alvaro

Engineering,
FURG,
Brazil,
Joined Mar 2020
5
17:11 Mar-31-2020
Measurement of lubricante film thickness using a PHASOR XS 16/64

Posted by FURG

Hi everyone,
I am conducting studies of ultrasound measurements to assess the thickness of the lubricating film using a PHASOR XS 16/64. I am using a 10 MHz PZT sensor to measure the thickness of the lubricating film at about 0.285 µm, but I am not sure if it is possible to use this equipment to obtain such thicknesses.

Another difficulty is in the export of test data. Is there any way out for a pc to perform data acquisition? Can anyone help me on this

Thanking you in advance

 
 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
22:31 Mar-31-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Alvaro at 17:11 Mar-31-2020 (Opening).

Measurement of such thin layers should be possible with this frequency if you measure the amplitude of reflected signals. In the paper of A.V. CLARK and H.H. CHASKELIS Measurement of ultrasound reflected from ultra-thin defects the method is described.
We have made measurements of such layers with good success, using scanners and focused transducer. Exact measurement requires calibration, since the theory is not giving exact results. At least as far as I know.

 
 Reply 
 
Alvaro Santos Piovesan
Engineering,
FURG, Brazil, Joined Mar 2020, 5

Alvaro Santos Piovesan

Engineering,
FURG,
Brazil,
Joined Mar 2020
5
21:38 Apr-03-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Wiesław Bicz at 22:31 Mar-31-2020 .

Thanks for the reply

In my case I will use a reference signal of known thickness by pressing the oil between two glass plates. This would be a type of calibration.
The sensor is capable of measuring thicknesses of this magnitude. I have doubts about the capacity of the equipment (GE PHASOR XS 16/64) used and whether the RS-232 output would provide me with the test information.

 
 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
22:13 Apr-03-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Alvaro Santos Piovesan at 21:38 Apr-03-2020 .

I am not able to help you with PHASOR, since I have no experience with this device.

 
 Reply 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 804

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
804
00:44 Apr-05-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Alvaro at 17:11 Mar-31-2020 (Opening).

Phased array is not the right approach

 
 Reply 
 
Alvaro Santos Piovesan
Engineering,
FURG, Brazil, Joined Mar 2020, 5

Alvaro Santos Piovesan

Engineering,
FURG,
Brazil,
Joined Mar 2020
5
01:07 Apr-05-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Wiesław Bicz at 22:13 Apr-03-2020 .

No problem. Thanks for help me.

 
 Reply 
 
Alvaro Santos Piovesan
Engineering,
FURG, Brazil, Joined Mar 2020, 5

Alvaro Santos Piovesan

Engineering,
FURG,
Brazil,
Joined Mar 2020
5
01:11 Apr-05-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Anmol Birring at 00:44 Apr-05-2020 .

Exactly. I am using PHASOR equipment in conventional mode.

 
 Reply 
 
Dr Phil Harper
Director, Tribosonics
Tribosonics Ltd, United Kingdom, Joined Feb 2004, 10

Dr Phil Harper

Director, Tribosonics
Tribosonics Ltd,
United Kingdom,
Joined Feb 2004
10
09:55 Apr-06-2020
Re: Measurement of lubricante film thickness using a PHASOR XS 16/64
In Reply to Alvaro at 17:11 Mar-31-2020 (Opening).

Hi Alvaro,

This is very possible. However it is rather non-conventional and there are a lot of aspects in the implementation that you have to consider in order to get it to work. I know that we struggled with some Commercial Off The Shelf equipment because of some of the signal processing that was being done in the background. However, with the right implementation it is a really excellent method!

Take a look at www.tribosonics.com for company info and/or drop me message.

Dr Phil Harper

 
 Reply 
 

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