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 -

143 views
Technical Discussions
Amir
Amir
12:13 Apr-18-2019
PAUT


In phased array ,what was signal response represent?
( it represent only maximum amplitude from defect ?
is not clear to me , what a hat represent in inspection system when we have some calibration ,
for example i calibrate my system for -14 db or o db for certain flaw and then when i acqusition i have lower threshold ,
how can extract signal from ut device for pod when i have certain db for certain flaw ?

Thanks

    
 
 
Edward Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1252

Edward Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1252
18:13 Apr-18-2019
Re: PAUT
In Reply to Amir at 12:13 Apr-18-2019 (Opening).

In the NDE Reliability course provided by Extende there is a good section on the prerequisites to apply the "ahat vs a" method. A primary requirement is that there is a linear relationship of the amplitude response (ahat) to the flaw size (a). In addition, there should be a constant variance (homoscedasticity) around the regression straight line for all defect sizes. And, the distribution of the defects in the population must be Gaussian.
If these parameters cannot be seen in the data set, then it is not suitable for ahat vs a analysis and a Hit/Miss approach is usually used to develop the POD.

1    
 
 

Product Spotlight

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

FlexoFORM™

The FlexoFORM™ solution integrates flexible phased array probe technology in a scanner to solv
...
e the challenges that come with inspecting pipe elbows. When combined with a water column, this solution can be used to collect easy-to-interpret data on elbows with diameters ranging from 4.5 in. OD up to flat and offers many benefits.
>

Exertus Dual 120

The Exertus Dual 120 Projector has the ability to accept Iridium 192 sources or Selenium 75 source
...
s. This projector incorporates design and safety features that make it flexible, compact and lightweight. The Projector is lighter than most of its competitors. It incorporates an improved source channel, based on a new helicoidal design, which makes maintenance easier. The helicoidal design also allows smoother movement of the source assembly inside the device, making it easier for the operator and improving safety. The Projector also has a unique safety feature not found in competitive products. The source assembly locking mechanism is triggered by the source holder capsule at the front of the source assembly, thereby always assuring the operator that the source has returned to the safe position. The Exertus Dual 120 is ISO3999:2004 compliant.
>

Aerospace Systems - Automated Ultrasonic Inspection

USL are specialists in the design and manufacture of turnkey ultrasonic inspection systems for aer
...
ospace applications. From monolithic composites to complex honeycomb structures. This video shows just a few examples of what is possible, find out more at: www.ultrasonic-sciences.co.uk
>

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