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 -

AT-Automation Technology GmbH
AT -Automation Technology is a systems house for industrial image processing. AT offers thermographic ndt systems as well as high-speed 3D sensors.
609 views
Technical Discussions
Dinko Dinev
Dinko Dinev
05:59 Feb-05-2000
question about freezing point

How to define by a ultrasonic method a beginning crystallization and point of freezing of complex biological liquids, for example, milk


 
 Reply 
 
Robert (Rocky) A. Day
Engineering
Milky Way Jewels, USA, Joined Nov 1998, 40

Robert (Rocky) A. Day

Engineering
Milky Way Jewels,
USA,
Joined Nov 1998
40
07:56 Feb-05-2000
Re: question about freezing point
Changes of state produce changes in velocity and attenuation. Both are easily measured and in the case of water to ice very dramatic.

The simplest setup is a pulse echo immersion transducer in a water tank with either the amplitude of the back wall of the water tank monitored. Or the time of flight monitored. Or both.

The influence of biological material in the water, other than lowering the freezing point, is uncertain but I would still expect a dramatic change in both of these ultrasonic properties when the fluid freezes.

: How to define by a ultrasonic method a beginning crystallization and point of freezing of complex biological liquids, for example, milk




 
 Reply 
 

Product Spotlight

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.
>

FMC/TFM

Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr
...
oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are:
  • Beautiful Image! Easier to understand what you're looking at
  • Completely focused in entire image or volume
  • Much easier to define setups before inspection
  • Easier to decipher geometry echoes from real defects
  • Oriented defects (e.g. cracks) are imaged better
  • See image from different wave modes from one FMC inspection
  • FMC data can be reprocessed/analyzed without going back to the field
>

Micro CT

nanoVoxel series has nano-scale resolution by using high voltage X-ray source (from 80-300 kV) wit
...
h micro focal spot and highly sensitive detector including different kinds of big size panel detectors and lens coupling CCD.
>

Varex Imaging Large Field of View (FOV) Digital Detector Arrays (DDAs)

A larger FOV DDA can reduce the space and volume of the X-ray inspection system on the factory floor
...
, enable faster scanning times, better throughput and better resolution images at a lower dose. Customers can also save time and money. With these benefits in mind, Varex Imaging has designed a family of large FOV detectors (4343HE, XRD 1611, 4343DX-I, 4343CT) for our industrial imaging customers.
>

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