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.
431 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

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

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.
>

NOVO Armor 15 & NOVO Armor 22

The Armor Kit Contains the NOVO Armor, which provides additional mechanical protection to the NOVO 1
...
5WN & NOVO 22WN Detectors, the Armor Stand and a traveling soft cover. - Newest shock absorbent technology case - Water resistant design - Supports wired & wireless communication - Multiple positioning options - Tripod connection using the Built-in 1/4” threads - Simple Detector battery replacement
>

OmniScan™ X3 flaw detector

The OmniScan X3 flaw detector is a complete phased array toolbox. Powerful tools, like total focus
...
ing method (TFM) images and advanced visualization capabilities, enable you to complete your inspection with greater confidence.
>

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