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 -
1111 views
Technical Discussions
Mir
Mir
18:23 Apr-07-2016
Rapid dB drop technique

During the PAUT study, I found the rapid dB drop technique (PAUT length sizing technique)sizing technique on Olympus webinar.

what is the rapid dB drop technique ?

    
 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 190

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
190
19:08 Apr-07-2016
Re: Rapid dB drop technique
In Reply to Mir at 18:23 Apr-07-2016 (Opening).

Mir,

A simple Google search would have yielded you the following:

http://www.slideshare.net/OlympusIMS/omnipc-flaw-sizing-demo-35926077

1    
 
 Reply 
 
Mir
NDT Inspector,
South Korea, Joined Apr 2016, 1

Mir

NDT Inspector,
South Korea,
Joined Apr 2016
1
19:40 Apr-07-2016
Re: Rapid dB drop technique
In Reply to Paul Holloway at 19:08 Apr-07-2016 .

Thanks for your information.

How can you apply the rapid dB drop technique?
can you give me the detail informations?

    
 
 Reply 
 
Daniel Braun
Daniel Braun
07:31 Apr-12-2016
Re: Rapid dB drop technique
In Reply to Mir at 19:40 Apr-07-2016 .

"Rapid dB Drop Technique" is just another new name for the technique, which is known since more than 50 years ago. Actually you may read the book for the Level I operators http://www.ndt.net/article/v05n09/berke/berke.pdf - chapter 6 related to the defects evaluation. In case of having the recorded A-Scans some dB drop for the defect sizing is implementable easily in the postprocessing software for every discontinuity recognized by the software - every state of the art PA instrument is equipped with this function, may be just the name of the function is different from one brand to another. However - with reference to the above book - this technique has a limitation - it may not be applied to the compact defects, which have the dimensions smaller than the beam width - in that case it is necessary to refer to the echo amplitude

    
 
 Reply 
 

Product Spotlight

SONOAIR - air-coupled Phased Array Ultrasonic Inspection System

For highly attenuating materials, the performance of the system is critical. The ultrasonic sensors,
...
the scanning area and the system settings should be flexibly adapted to the test task and the material. These high expectations are met with the new and modular testing system SONOAIR. With the world’s first air-coupled phased-array UT inspection system SONOAIR we developed a technology that works with up to 4 transmitter and receiver channels with freely configurable square wave burst transmitters as wells as low noise receiving amplifiers.
>

Navic - Steerable Modular Automated Scanner

The Navic is a modular, motorized, steerable scanner designed to carry multiple attachments used
...
in various scanning and inspection applications. The Navic is capable of weld scanning (girth welds and long seam welds), automated corrosion mapping, and tank scanning.
>

Ultrasonic Testing Immersion Tanks with Unmatched Scanning Features

TecScan’s non-destructive testing Ultrasonic Immersion Tanks & scanners are designed for high pe
...
rformance and demanding NDT testing applications. Our Scan3D™ line of High Precision Immersion Tanks are specifically designed for automated ultrasonic testing of complex composites parts used in aerospace and industrial applications.
>

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

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