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Technical Discussions
21:22 Feb-01-2012
Gary
 1256 views
AGR TD Scan PAUT questions
Hi All,

Please if someone have experience in AGR unit could explain the Idx points and Stride in the focal law tab. Currently im setting up for linear scan but i seems confuse on how these two functions work.

Regards

08:19 Feb-02-2012

Shahid Bangash

Engineering, ,
SGS Pakistan (Pvt) Ltd,
Pakistan,
Joined Feb 2009
117
Re: AGR TD Scan PAUT questions
In Reply to Gary on 21:22 Feb-01-2012 (Opening).

Gary
For Sectorial scan you need not to enter these parameters but for Linear(electronic) scan you should have to enter proper index point and stride values.
I initially thought of a reverse of that but actually If i m not wrong Index point is your element step & stride the total no of (I.P)steps to be proceeded.
If u have 16 no. of elements with 1 element active and u want to have a step of one element multiplexing up to last element then your index point should be one & Stride to be 15. In this case stride of 16 is not possible.
Similarly for 1 active element and multiplexing of 2 elements steps upto last element then your index point to be 2 & Stride to be 7.
let it try and respond

10:40 Feb-02-2012

Mark Nel
IMechE,
United Kingdom,
Joined Jul 2005
52
Re: AGR TD Scan PAUT questions
In Reply to Gary on 21:22 Feb-01-2012 (Opening).

Hi Gary
Shahid is correct, IDX POINTS is the number of steps the aperture will make (each step has a different index point) and STRIDE is the amount of elements to skip (if any) between steps. You can email me directly if you have any other questions - Mark

20:00 Feb-23-2012
Gary
Re: AGR TD Scan PAUT questions
In Reply to Mark Nel on 10:40 Feb-02-2012 .

Shahid and Mark Nel,

Thanks for the info. Btw i am succeed in understanding the concept between index points and stride but what is the relation between Number of Active, Idx points and Stride.
For example i am using 32 elements, the max i can input would be Active: 2, Idx points: 1 and Stride 6. How does the Active Elements affect to the Index points and stride.

Thanks.

10:06 Feb-24-2012

Mark Nel
IMechE,
United Kingdom,
Joined Jul 2005
52
Re: AGR TD Scan PAUT questions
In Reply to Gary on 20:00 Feb-23-2012 .

Hi Gary, Lets take the example of a 64 element probe with a 32 element aperture(number of active), using an IDX Points setting of 1 (or 0 for pre version 19.00 software) then the aperture can move 32 times(64-32=32), but if you reduce the aperture to 16 elements then 48 steps can be made (64-16=48). If you keep the 16 elt aperture and change the STRIDE to 2 then the aperture will skip an element in every step so will therefore only make 32 steps. It is unlikely that you would use a higher number stride but of course it is possible, it should be noted that increasing the stride has advantages but also and a cost; the advantage is faster scanning and smaller file size, the cost is loss of resolution however this may be an acceptable loss if detection ability is proven.

17:05 Mar-06-2012

Carlos SuĂˇrez
Consultant, ASNT NDT LEVEL III,
Integrity & NDT Solutions,
Colombia,
Joined Mar 2010
9
Re: AGR TD Scan PAUT questions
In Reply to Gary on 21:22 Feb-01-2012 (Opening).

Gary, is more easy to use ESBeamtool software for scanning plan, and after export it to AGR Equipment.

In ESBeamtool software, You can clarify questions about aperture, step, beam divergence and near field.

An aperture of 16 elements is appropriate for most cases

Regards

Carlos SuĂˇrez

08:44 Apr-07-2015
vikas chandra
Re: AGR TD Scan PAUT questions
In Reply to Carlos SuĂˇrez on 17:05 Mar-06-2012 .

hi Mr. Nel
i want to make a scan plan for TOFD in which one side surface is inclined.
esbm tool has no feature to move probe at some angle for tofd but for paut it is possible in beam tool software.
please suggest me any other scan plan software if you can.

18:07 Apr-07-2015

Mark Nel
IMechE,
United Kingdom,
Joined Jul 2005
52
Re: AGR TD Scan PAUT questions
In Reply to vikas chandra on 08:44 Apr-07-2015 .

Hi Vikas
As I mentioned in my direct mail earlier, ToFD can be handled by ESBeamtool very well on a weld with dissimilar parent material thicknesses by using the SLOPE controls. I will look at the somewhat unusual EBWK file you sent and attempt to find a solution.
Regards
Mark

00:33 Apr-08-2015

vikas chandra

NDT Inspector, technician,
India,
Joined Apr 2015
4
Re: AGR TD Scan PAUT questions
Dear Mr. Nel

PLease suggest me any other soft ware if you can because ESBM tool has no feature.

please see the replied mail by mr. jim(Jim Brown Software Developer Eclipse Scientific Products)

Hello Vikas,

If Iâ€™m understanding your question correctly, this scenario is not yet supported in any version of BeamTool.
In BeamTool, TOFD can be configured on a flat piece, an axial piece (ID/OD) and on a custom piece (as in your example) but the TOFD probes can only bet set with symmetrical angles. This would result in this:

Thanks,

Jim

Jim Brown
Software Developer
Eclipse Scientific Products Inc.
1260 2nd Avenue East, Unit 4, Owen Sound, Ontario, N4K 2J3, Canada
Phone (519) 372-1831 Ext. 326
jbrown@eclipsescientific.com www.eclipsescientific.com

13:28 Apr-08-2015

Mark Nel
IMechE,
United Kingdom,
Joined Jul 2005
52
Re: AGR TD Scan PAUT questions
In Reply to vikas chandra on 00:33 Apr-08-2015 .

Vikas,
As Jim stated, ESBT does not support your item configuration using the ToFD probe feature. I suppose you could try using two opposing conventional probes configured to produce similar beams. this would allow you to both change the offsets individually as well as position the probe correctly on the slope. Granted this would not give the same level of information relevant to ToFD but could be useful nonetheless. Perhaps our other knowledgeable forum participants could provide suggestions.

22:24 Apr-22-2015
Peter Clark
Re: AGR TD Scan PAUT questions
In Reply to Mark Nel on 13:28 Apr-08-2015 .

Mark's suggestion for using two conventional probes it the suggested work around for representing TOFD on sloped surfaces.

Please do not hesitate to contact me with any further questions or concerns.

Thanks