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 -

963 views
Technical Discussions
John
John
05:25 Feb-26-2007
how phase array technology avoid the interference between elements?

each element generate a wavelet, when the wavelet meet a flaw,reflected wave occured.my question is:the reflected signal will aslo received by other elements,but actually this not happened,how phase array technology avoid the interference between elements?


 
 Reply 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 528

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
528
06:29 Feb-26-2007
Re: how phase array technology avoid the interference between elements?
This does happen, it is a key part of the science by which PA works.

Joe

----------- Start Original Message -----------
: each element generate a wavelet, when the wavelet meet a flaw,reflected wave occured.my question is:the reflected signal will aslo received by other elements,but actually this not happened,how phase array technology avoid the interference between elements?
------------ End Original Message ------------




 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
09:52 Feb-26-2007
Re: how phase array technology avoid the interference between elements?
You will find a brief explanation in the "How do they work?" section of this paper from our web site.


 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1307

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1307
00:20 Feb-27-2007
Re: how phase array technology avoid the interference between elements?
Yunxi:
The "interference" in phased array probes is the principle by which they work. You can see some images of phase constructed pulses on the pdf file at http://www.ndt.net/article/wcndt2004/html/htmltxt/127_ginzel.htm
The transmitted pulses are illustrated there and you see that the wavelets are used to construct a main pulse that has effectively the same characteristics as a single element pulse. It is NOT the individual wavelets that we deal with when using the pulse generated from a phased array probe!! They form a wavefront that is used in that same way that single element UT was used.

The receive function of the phased array probe is similar. The individual elements on a linear array each receive a portion of the pressure of the reflected pulse. The voltages they form to are sent to individual amplifiers to account for timing differences and then this is sent to a summation amplifier. An simplified diagram of the electronics is seen in a paper by Dr. Wüstenberg http://www.ndt.net/article/v04n04/wuesten/wuesten.htm


Regards
Ed

----------- Start Original Message -----------
: This does happen, it is a key part of the science by which PA works.
: Joe
: : each element generate a wavelet, when the wavelet meet a flaw,reflected wave occured.my question is:the reflected signal will aslo received by other elements,but actually this not happened,how phase array technology avoid the interference between elements?
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

Portable Ground Penetrating Radar - Proceq GP8000

The Proceq GP8000 portable ground penetrating radar instrument is the beginning of a new era in ND
...
T. The outstanding, patented ultra- wideband technology combined with a compact wireless probe delivers unmatched industry performance. Proceq GP8000 is the world’s first large-scale inspection solution that utilizes Augmented Reality in industrial applications.
>

VOGT Ultrasonics awarded innovation champion

Let go of the old and try something new. VOGT convinced the jury in the 27th round of the TOP 100
...
innovation competition. Our team is very pleased to officially belong to the TOP 100 in Germany!
>

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
>

VeeScan AirCraft Wheel Inspection

The VEESCAN offers maximum flexibility, has a proven mechanical design and records of breakdown-fr
...
ee operation of over 365 days. Appealing to companies in the Aerospace industry, the VEESCAN is ideal for all wheel-testing environments. With a wide selection of probes, the VeeScan allows your wheel testing facility the flexibility to select the most compatible configurations with their workload.
>

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