Air-coupled ultrasonic evaluation of food materials.

This research was performed with the aim of detecting foreign bodies and additives within food products, and to measure selected acoustic properties, without contact to the sample. This would allow use in manufacturing plants on production lines, where contacting the product for ultrasonic inspection would not be feasible. Images of internal structure are reported. The air-coupled system uses capacitive devices which are able to provide sufficient bandwidth for many measurements, including the detection of foreign bodies in cheese, the detection of deliberate additives to chocolate, the detection of fill level and content of metallic food cans, and measurements of frozen dough products. The approach demonstrates that ultrasound has the potential for application to many industrial food packaging environments where non-metallic objects within food need to be detected.

[1]  N. Sanjuán,et al.  Use of ultrasound to assess Cheddar cheese characteristics. , 2000, Ultrasonics.

[2]  Timothy J. Mason,et al.  The uses of ultrasound in food technology , 1996 .

[3]  D. Schindel,et al.  The design and characterization of micromachined air-coupled capacitance transducers , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4]  A. Mulet,et al.  Application of low intensity ultrasonics to cheese manufacturing processes. , 2002, Ultrasonics.

[5]  Dietrich Knorr,et al.  Applications and potential of ultrasonics in food processing , 2004 .

[6]  Malcolm J. W. Povey,et al.  Ultrasonics in food engineering Part II: Applications , 1989 .

[7]  B. Cho,et al.  Rapid measurement of physical properties of cheddar cheese using a non-contact ultrasound technique , 2001 .

[8]  D. A. Hutchins,et al.  Preliminary studies of a novel air-coupled ultrasonic inspection system for food containers , 2002 .

[9]  C. Javanaud,et al.  Applications of ultrasound to food systems , 1988 .

[10]  A. Turó,et al.  Use of ultrasound for the determination of flour quality. , 2007, Ultrasonics.

[11]  Otman Basir,et al.  Ultrasound based glass fragments detection in glass containers filled with beverages using neural networks and short time Fourier transform , 2006 .

[12]  Joseph Maria Kumar Irudayaraj,et al.  A Noncontact Ultrasound Approach for Mechanical Property Determination of Cheeses , 2003 .

[13]  David A. Hutchins,et al.  Measurement of elastic constants in composite materials using air‐coupled ultrasonic bulk waves , 1996 .

[14]  David G. Daut,et al.  Use of an ultrasonic technique to evaluate the rheological properties of cheese and dough , 1992 .

[15]  Edward Hæggström,et al.  Ultrasound detection and identification of foreign bodies in food products , 2001 .

[16]  S. Gunasekaran,et al.  Cheese Rheology and Texture , 2002 .

[17]  Bruce G. Batchelor,et al.  Approaches to foreign body detection in foods , 1998 .

[18]  Martin G. Scanlon,et al.  Monitoring Dough Fermentation Using Acoustic Waves , 2003 .

[19]  David Julian McClements,et al.  Ultrasonics in food engineering. Part I: Introduction and experimental methods , 1988 .

[20]  G. Mittal,et al.  A self-aligning ultrasound sensor for detecting foreign bodies in glass containers. , 2003, Ultrasonics.

[21]  D. Schindel,et al.  The use of broadband acoustic transducers and pulse-compression techniques for air-coupled ultrasonic imaging. , 2001, Ultrasonics.

[22]  Chyung Ay,et al.  Milk coagulation cut-time determination using ultrasonics , 1996 .

[23]  R. Milczarek,et al.  In-line monitoring of tomato concentrate physical properties during evaporation , 2006 .

[24]  M. Scanlon,et al.  The influence of specific mechanical energy on the ultrasonic characteristics of extruded dough , 2008 .

[25]  Otman Basir,et al.  Detection of metal, glass and plastic pieces in bottled beverages using ultrasound , 2003 .

[26]  David A. Hutchins,et al.  Non-contact ultrasonic quality measurements of food products , 2006 .

[27]  Gauri S. Mittal,et al.  Hybrid of multi-signal processing methods for detection of small objects in containers filled with beverages using ultrasound , 2007 .

[28]  David W. Penman.  Automated x-ray detection of contaminants in continuous food streams , 1996, Other Conferences.

[29]  David A. Hutchins,et al.  Non-contact evaluation of milk-based products using air-coupled ultrasound , 2006 .

[30]  R. Dearden.  AUTOMATIC X-RAY INSPECTION FOR THE FOOD INDUSTRY , 1996 .

[31]  J. Bows,et al.  MRI phase mapping of temperature distributions induced in food by microwave heating. , 2000, Magnetic resonance imaging.

[32]  Patrick P C Tsui,et al.  Wavelet basis selection and feature extraction for shift invariant ultrasound foreign body classification. , 2006, Ultrasonics.

[33]  Joseph Maria Kumar Irudayaraj,et al.  Foreign Object and Internal Disorder Detection in Food Materials Using Noncontact Ultrasound Imaging , 2003 .

[34]  E. R. Davies,et al.  Texture analysis for foreign object detection using a single layer neural network , 1994, Proceedings of 1994 IEEE International Conference on Neural Networks (ICNN'94).

[35]  Otman Basir,et al.  FOREIGN BODY DETECTION IN FOODS USING THE ULTRASOUND PULSE/ECHO METHOD , 2004 .