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 -

GB Inspection Systems Ltd.
A leading UK manufacturer of Ultrasonic Probes, Accessories, Supplier of NDT Equipment and more.
436 views
Technical Discussions
Marvin Klein
Director, -
Intelligent Optical Systems, USA, Joined Nov 1998, 3

Marvin Klein

Director, -
Intelligent Optical Systems,
USA,
Joined Nov 1998
3
02:46 Sep-06-1996
Airscan transducer performance

A few questions about airscan transducer performance.

(1) What kind of resolution can you obtain in 1/2 inch thick composite materials?
(2) What is the frequency used and the signal-to-noise ratio?
(3) What are the limitations in thickness?

Have you looked at combining laser generation of ultrasound (very efficient, and still noncontact) with airscan detection?


Marvin Klein


 
 Reply 
 
Bill Grandia
Bill Grandia
00:49 Sep-08-1996
Re: Airscan transducer performance
: A few questions about airscan transducer performance.

: (1) What kind of resolution can you obtain in 1/2 inch thick composite materials?
: (2) What is the frequency used and the signal-to-noise ratio?
: (3) What are the limitations in thickness?

: Have you looked at combining laser generation of ultrasound (very efficient, and still noncontact) with airscan detection?

:
: Marvin Klein

1) Please refer to our answers to R. Diederichs' questions.
2) Airscan instrumentation (Sonda 007) uses discrete frequencies of 200, 400, and 1000 kHz, 400 kHz being the most commonly used value. The S/N ratio depends on the overall gain level and and material attenuation. In general, S/N ratio better than 40:1 can be achieved.
3) Please consider that the losses due to the bulk absorption are negligible as compared to the reflection losses at the surfaces. Thickness limitations are therefore not critical. We have successfully inspected composite laminates of up to 6 inches thickness.

Yes. Preliminary experiments in detecting laser generated ultrasound with air-coupled acoustic receivers in composite laminates gave a S/N ratio of about 40:1. Further investigations are in progress.




 
 Reply 
 

Product Spotlight

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

Lyft™: Pulsed Eddy Current Reinvented

PEC Reinvented—CUI Programs Redefined Corrosion under insulation (CUI) is possibly the greatest u
...
nresolved asset integrity problem in the industry. Current methods for measuring wall thickness with liftoff, without removing insulation, all have severe limitations. Eddyfi introduces Lyft — a reinvented, high-performance pulsed eddy current (PEC) solution. The patent- pending system features a state-of-the-art portable instrument, real- time C-scan imaging, fast data acquisition with grid-mapping and dynamic scanning modes, and flexibility with long cables. It can also scan through thick metal and insulation, as well as aluminum, stainless steel, and galvanized steel weather jackets. Who else but Eddyfi to reinvent an eddy current technique and redefine CUI programs. Got Lyft?
>

FAAST-PA! OEM Patented phased Array for high speed UT inspection

Multiangle, Multifocus, Multifrequency, Multibeam. Instead of stacking UT electronics and having m
...
any PA probes, FAAST-PA is able to transmit all delay laws within ONE single shot in Real time.
>

AMIGO2

TSC Amigo2 - ACFM technology has developed a solid reputation for accurately detecting and sizing
...
surface-breaking cracks through paint and coatings. As the industry demands increased performance in speed, signal quality, and portability, it’s time for an evolution. It’s time for Amigo2.
>

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