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Non-contact evaluation of milk-based products using air-coupled ultrasound

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Meyer, S, Hindle, Steve, Sandoz, J-P, Gan, T H and Hutchins, David A. (2006) Non-contact evaluation of milk-based products using air-coupled ultrasound. Measurement Science & Technology, Volume 17 (Number 7). pp. 1838-1846. doi:10.1088/0957-0233/17/7/023

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Official URL: http://dx.doi.org/10.1088/0957-0233/17/7/023

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Abstract

dAn air-coupled ultrasonic technique has been developed and used to detect physicochemical changes of liquid beverages within a glass container. This made use of two wide-bandwidth capacitive transducers, combined with pulse-compression techniques. The use of a glass container to house samples enabled visual inspection, helping to verify the results of some of the ultrasonic measurements. The non-contact pulse-compression system was used to evaluate agglomeration processes in milk-based products. It is shown that the amplitude of the signal varied with time after the samples had been treated with lactic acid, thus promoting sample destabilization. Non-contact imaging was also performed to follow destabilization of samples by scanning in various directions across the container. The obtained ultrasonic images were also compared to those from a digital camera. Coagulation with glucono-delta-lactone of skim milk poured into this container could be monitored within a precision of a pH of 0.15. This rapid, non-contact and non-destructive technique has shown itself to be a feasible method for investigating the quality of milk-based beverages, and possibly other food products.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Journal or Publication Title: Measurement Science & Technology
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0957-0233
Official Date: 7 June 2006
Dates:
DateEvent
6 March 2006Submitted
7 June 2006Published
Volume: Volume 17
Number: Number 7
Number of Pages: 9
Page Range: pp. 1838-1846
DOI: 10.1088/0957-0233/17/7/023
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

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