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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
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 | ||||||
| Journal or Publication Title: | Measurement Science & Technology | ||||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||||
| ISSN: | 0957-0233 | ||||||
| Official Date: | 7 June 2006 | ||||||
| Dates: |
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| 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 |
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