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Technical Discussions
Liviu Singher
Liviu Singher
02:20 Jun-01-1997
Can US propagate through agricultural products?

Since an agricultural product (mainly fruits and vegetables) is a
complex biological structure, it seems to me that it may be quite
difficult to evaluate using ultrasound. Is anybody familiar with
work performed for the evaluation of the quality of agricultural
products? What is the conclusion?

Liviu Singher



    
 
 
Mark Friesel
Mark Friesel
02:38 Jun-02-1997
Re: Can US propagate through agricultural products?
: Since an agricultural product (mainly fruits and vegetables) is a
: complex biological structure, it seems to me that it may be quite
: difficult to evaluate using ultrasound. Is anybody familiar with
: work performed for the evaluation of the quality of agricultural
: products? What is the conclusion?

: Liviu Singher

Try Ron Hockey at Battelle (509) 375-1212. I know a few years ago he
was playing with the idea of using EC to measure the moisture content of
grapes, and may know of some other applications.

MAF


    
 
 
Tom Bloodworth
Tom Bloodworth
05:36 Jun-02-1997
Re: Can US propagate through agricultural products?
: Since an agricultural product (mainly fruits and vegetables) is a
: complex biological structure, it seems to me that it may be quite
: difficult to evaluate using ultrasound. Is anybody familiar with
: work performed for the evaluation of the quality of agricultural
: products? What is the conclusion?

: Liviu Singher


Bodies are complex biological strctures but ultrasound imaging of them
seems much better than we can manage in steel. Is it because only
compression modes can exist?

Tom Bloodworth


    
 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
05:14 Jun-03-1997
Re: Can US propagate through agricultural products?

: Since an agricultural product (mainly fruits and vegetables) is a
: complex biological structure, it seems to me that it may be quite
: difficult to evaluate using ultrasound. Is anybody familiar with
: work performed for the evaluation of the quality of agricultural
: products? What is the conclusion?

: Liviu Singher

It's certainly not a major application, but it can be done. We recently supplied equipment to a customer who is evaluating the freshness of watermelons by looking at longitudinal wave transit time in a low frequency (100 KHz) through transmission mode.

I am also aware of similar testing involving potatoes, and I suspect that with sufficient "calibration" research the principle could be applied to many fruits and vegetables that get softer and/or change water content as they ripen. Bon appetite!

--Tom Nelligan
Panametrics, Inc.


    
 
 
Rolf Diederichs
Director, Editor
NDT.net, Germany, Joined Nov 1998, 602

Rolf Diederichs

Director, Editor
NDT.net,
Germany,
Joined Nov 1998
602
06:08 Jun-03-1997
Re: Can US propagate through agricultural products?
: Since an agricultural product (mainly fruits and vegetables) is a
: complex biological structure, it seems to me that it may be quite
: difficult to evaluate using ultrasound. Is anybody familiar with
: work performed for the evaluation of the quality of agricultural
: products? What is the conclusion?

: Liviu Singher

Liviu,

below I pasted three parts about agriculture I found on UTonline.
The evaluation of sound velocity is most often used.

-----------------
TOC - June 97: Periodicals related to Ultrasonic Testing
http://www.ultrasonic.de/publicat/bibliog/toc_0697.htm
JT Computers and electronics in agriculture.
DA MAY 01 1997 v 17 n 2 PG 217
AU Fisher, A. V.
TI A review of the technique of estimating the composition of livestock using
the velocity of ultrasound.

-----------------
UTonline ISRAEL MAP
http://www.ultrasonic.de/map/il_map/il.htm

......, but we did find a special UT application for testing avocados - this was a development patented by Dr. A. Mizrach for AvoTec Ltd. Fruit Sorting Devices and the Netanya Hamania
National Assn. for R&D. Company manager Amitai Keren [6], M.Sc. told us that in April 1995 the first prototype was successfully installed in an Israeli supermarket. The system works with Ultrasound at 50khz, contains 3 or (in the latest version, just 2) transducers for angle through transmission and evaluation of noise attenuation. The sound penetrates less than 10 mm under the surface.
[6] AvoTec Ltd. Fruit Sorting Devices
Netanya Hamania National Ass. for R&D General Manager Mr. Amitai Keren, M.Sc. Phone: 972-9-851081, Fax: -851090 Patent holder: Dr. A. Mizrach Agr. Eng., The Volcani Center Israel,
Email: veamosm@volcani.agri.gov.il

--------------------
UTonline encyclopeadia
http://www.ultrasonic.de/map/il_map/il.htm/article/ut_az/ut_a/ut_a.htm#agric

Agriculture (Food Products, Biomaterials): UT is applied for this smaller NDT industry and unique
applications are always in development. Difficulties of the tasks are more related to the medicine area since the
material tested has often similar ultrasound conditions as the human body. That means more lower-frequency
testing. High-value fresh agricultural products must be sorted in order to meet the quality standards demanded
by the customer. High quality standards and the necessity of determining shelf-life have heightened the need
for a reliable evaluation of the internal properties of each individual fruit. UT is available for quality detection
and sorting according to fruit properties. Quality control of meat and oil are other examples of agricultural use
of UT and use methods similar to those applied to engineering materials characterization with no need for
defectoscopy. Typical evaluated data are ultrasound attenuation and velocity, correlated to the properties of
the parts.



    
 
 

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