Tuesday, January 24, 2017

Techshore Inspection Services : Ultrasound Testing Technique- Through-Transmission

 Ultrasonic pulse echo or through transmission measurements are used for a quality control of products in various areas of industry. This technique is sufficiently fast to enable monitoring deviations of thickness or ultrasound velocity under industrial conditions. The estimation of appropriate thickness or ultrasound velocity values is based on measurement of the time of flight of an ultrasonic signal in the test sample. In this case propagation time and distortion of the received signal waveform includes information about measurement object and its internal structure. The delay time estimation is one of the most essential procedures in ultrasonic through transmission measurements. In the case when transmitting and receiving transducers are placed in water tank, two signals are being exploited: the signal transmitted only through water and the signal transmitted through the immersed test sample which has been placed between transducers. The time interval between these two signals is the physical quantity necessary to measure.

  1. Two transducers located on opposing sides of the test specimen are used.  One transducer acts as a transmitter, the other as a receiver.
  2. Discontinuities in the sound path will result in a partial or total loss of sound being transmitted and be indicated by a decrease in the received signal amplitude.
  3. Through transmission is useful in detecting discontinuities that are not good reflectors, and when signal strength is weak.  It does not provide depth information.


Digital display showing received sound through material thickness.

Digital display showing loss of received signal due to presence of a discontinuity in the sound field. 

Graph Interpretation: 






References:
https://en.wikipedia.org/wiki/Ultrasonic_testing

Related blogs :

http://techshoreinspections.blogspot.com/2017/01/Techshore-Inspection-Services-ndt-ultrasonic-testing.html
http://techshoreinspections.blogspot.com/2016/12/Techshore-Inspection-Services-liquid-penetrant-test.html
http://techshoreinspections.blogspot.com/2016/10/ultrasound-testing-techniques-contact.html
http://techshoreinspections.blogspot.com/2016/10/ultrasound-testing-technique-through.html
http://techshoreinspections.blogspot.com/2016/10/ultrasound-testing-techniques-pulse.html
http://techshoreinspections.blogspot.com/2016/10/ultrasonic-testing-techniques.html
http://techshoreinspections.blogspot.com/2016/10/ultrasound-generation-principles-of.html
http://techshoreinspections.blogspot.com/2016/10/ndt-ultrasonic-testing-beam-explained.html
http://techshoreinspections.blogspot.com/2016/10/introduction-to-ndt-non-destructive.html
http://techshoreinspections.blogspot.com/2016/09/techshore-non-destructive-testing-ndt.html
http://techshoreinspections.blogspot.com/2016/09/techshore-inspection-services-explains_6.html

Documents : 

https://www.slideshare.net/techshoreinspectionservices/civil-engineering-process-of-well-treatment-techshore
https://www.slideshare.net/techshoreinspectionservices/ndt-ultrasonic-testing-techshore
https://www.slideshare.net/techshoreinspectionservices/ndt-liquid-penetration-test-techshore

Additional references:
https://www.youtube.com/channel/UCfufdF0-Hs3sLu1IX52ZJYA/videos
http://techshore.in/blog
http://techshore-updates.blogspot.in/
https://techshore-inspection-services.blogspot.in/
https://techshoreinspectionservices.blogspot.in/
https://techshoreinspections.blogspot.in/


You Tube Tutorials :
https://www.youtube.com/watch?v=bfW1eL0aTlU
https://www.youtube.com/watch?v=URlwZ3R94u8
https://www.youtube.com/watch?v=6w9Cl58-p34
https://www.youtube.com/watch?v=ZVnsx5VC77g
https://www.youtube.com/watch?v=3ZD4je9Fbn8
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Location: 36/977A Kattunilath, Lissie Hospital Road, Kochi, Kerala 682018, India

2 comments:

  1. John Walter4:16 PM, March 15, 2017

    I have gone through the site and read all blogs and this is a nice one:

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    ReplyDelete
    Replies
    1. Techshore Inspection Services8:56 AM, March 16, 2017

      Howdy, John.
      If you are interested in further reading reading please check this site https://www.techshore.com/

      Delete

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