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 -

Matec Instrument Companies, Inc.
Ultrasonic test instrumentation and systems for quality control inspection and production testing applications and scientific research.
497 views
Technical Discussions
Ray
Engineering
Penn State, USA, Joined Mar 2004, 1

Ray

Engineering
Penn State,
USA,
Joined Mar 2004
1
00:22 Mar-09-2004
NDT - Delay Lines

Hi All

I am a new user to this field and have my first big project. A related quick question: we have 8 channels which we need to mux. All carry ultrasound responses at the same time. We are looking at delay methods so to sample all of them at the same time.

Any idea on what delay lines to use. We want to use analog delay lines, and want to limit losses. We work at low frequencies (< 10 MHz). Any ideas and brands


 
 Reply 
 
Joerg Schulze-Clewing
Joerg Schulze-Clewing
04:11 Mar-13-2004
Re: NDT - Delay Lines
Ray, it's been a long time that I used analog delay lines.
One manufacturer was Belfuse. I suggest doing a Google
search to see which ones are still out there. Another mfg
we used was Kappa.

Nowadays it is all done digitally. Check out the newer
Texas Instruments AD converters.

All the best, Joerg.

----------- Start Original Message -----------
: Hi All
: I am a new user to this field and have my first big project. A related quick question: we have 8 channels which we need to mux. All carry ultrasound responses at the same time. We are looking at delay methods so to sample all of them at the same time.
: Any idea on what delay lines to use. We want to use analog delay lines, and want to limit losses. We work at low frequencies (< 10 MHz). Any ideas and brands
------------ End Original Message ------------




 
 Reply 
 
Joerg Schulze-Clewing
Joerg Schulze-Clewing
01:59 Mar-13-2004
Re: NDT - Delay Lines
Ray, here is an example of one of the sources a Google
search yields:

http://www.bertech.com/Components/rcd/delaylines.htm

I suggest to stick with passive delay lines and prefer
lower impedances. That makes life easier at 10MHz. Also,
they need to be current driven for summation into a matching
output resistor, that's the usual scenario.

Resist the temptation of using silicon prop delays, it
can result in errors and phase noise.

Regards, Joerg.


----------- Start Original Message -----------
: Hi All
: I am a new user to this field and have my first big project. A related quick question: we have 8 channels which we need to mux. All carry ultrasound responses at the same time. We are looking at delay methods so to sample all of them at the same time.
: Any idea on what delay lines to use. We want to use analog delay lines, and want to limit losses. We work at low frequencies (< 10 MHz). Any ideas and brands
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

Sci Aps Z-Series Portable Handheld Analysers

The world’s only handheld analyzer that measures carbon content in stainless (yes even L-grades),s
...
teels, and cast irons. Also accepted for low Si analysis for sulfidic corrosion analysis, and is widely used in the power industry for Cr analysis, for flow accelerated corrosion applications.
>

Research and Application Development For NDT

Acuren’s Research and Application Development specializes in the development of advanced ultraso
...
nic inspection techniques and systems for challenging inspection applications, with an emphasis on practical solutions which are field deployable. Services include manual and automated ultrasonic inspection system development, inspection technique optimization using laboratory scale studies and ultrasonic modeling (CIVA, BeamTool), preparing technical justification for technique evaluation and qualification (Probability of Detection and sizing accuracy studies), inspection/calibration/analysis procedure preparation to support field deployment of custom techniques, and development of custom imaging algorithms to support challenging inspection applications.
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of defects. With a remarquable short test time and a high detection sensitivity, the Telops TESTD-PT is the perfect tool for non- destructive testing. With such high frame rates, it is even possible to investigate highly conductive or diffusive materials.
>

Echomac® PA Bar Tester

The Echomac® PA BT provides 100% inspection of round bars for core and surface defects, at speeds u
...
p to 2 m/sec, depending on the specific application. The unit allows producers to handle a much larger range of diameters in one installation, and is available in 3 models to test 10 – 75mm diameter (small model); 20 – 130mm (medium model) or 50 – 254mm (large model) bars.
>

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