Non-destructive measurements of the egg quality

Ketelaere, Bart De; Bamelis, Flip; Kemps, Bart; Decuypere, Eddy; Baerdemaeker, Josse De

doi:10.1079/wps200417

Cited by 71 publications

(40 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This new measurement better describes the global behavior of eggshells and varies slightly when measured at different positions (De Ketelaere et al, 2002). It has been proved to be a most promising method that could be applied in genetic selection and on-line detection due to its rapid speed of measurement and nondestructive nature (Coucke et al, 1999;De Ketelaere et al, 2000;De Ketelaere et al, 2002;De Ketelaere et al, 2004;Dunn et al, 2005;Bain et al, 2006;Amer Eissa, 2009). …”

Section: Introductionmentioning

confidence: 99%

Effect of Uniformity of Eggshell Thickness on Eggshell Quality in Chickens

et al. 2014

View full text Add to dashboard Cite

Numerous parameters have been proposed to evaluate eggshell quality in order to reduce losses from damaged eggshells. The uniformity of eggshell thickness (UET), as a newly proposed parameter, is defined as the reciprocal of the coefficient of variation of the eggshell thickness of multiple points on the eggshell surface. In this study, we further evaluated the relationship between UET and eggshell quality of eggs from Lohmann Brown layers. Three hundred and thirty fresh eggs from 40-week-old hens were collected. Egg weight, eggshell weight, eggshell thickness, shape index, and breaking strength were measured, and UET, static stiffness, fracture toughness, and elastic modulus were calculated. The relationship between UET and other eggshell quality parameters was analyzed. Results show that UET is positively correlated with eggshell thickness, breaking strength, static stiffness, and fracture toughness (r＝0.297, 0.430, 0.409, and 0.171, respectively, P＜0.01). In order to analyze the effect of UET on eggshell quality, eggs were divided into three groups according to their eggshell thickness (thin, medium, and thick), and eggs within each thickness group were subdivided into three subgroups based on their UET (low, medium, and high). Relationship between UET and eggshell quality was analyzed. Result showed that eggs with higher UET in the thin group had higher breaking strength, static stiffness, fracture toughness, and elastic modulus than those with lower UET in the medium group, indicating that eggs with thinner but more uniform eggshells were stronger than those with thicker but less uniform eggshells. Our study suggested that UET has a significant influence on breaking strength, static stiffness, fracture toughness, and elastic modulus and should be included in evaluating eggshell quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Uniformity of Eggshell Thickness on Eggshell Quality in Chickens

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Obviously any egg will break if it is hit hard enough (Carter, 1970) and as a result considerable effort has been directed at ways of reducing the insults experienced by eggs during routine egg handling procedures (Hamilton et al, 1979), and more recently at ways of detecting cracked eggshells online in packing stations (De Ketelaere et al, 2004). A complementary strategy is to improve the strength and quality of the eggshell by breeding.…”

Section: Introductionmentioning

confidence: 99%

Probability of an egg cracking during packing can be predicted using a simple non-destructive acoustic test

Bain

Dunn

Wilson

et al. 2006

British Poultry Science

Self Cite

View full text Add to dashboard Cite

1. The aim of this investigation was to test the predictive power of the dynamic stiffness measurement to identify eggs which are most likely to crack under field conditions. 2. A representative sample of eggs (n ¼ 1660) was collected from the front of the cages in a commercial battery unit. Egg weight,% damping and dynamic stiffness (K dyn ) were recorded using an acoustic crack detection device. Intact eggs were marked and replaced in the front of the cages. These eggs were subsequently passed through online collection, grading and packing machinery, along with a volume of unmarked eggs. At the end of packing the acoustic test was repeated on the marked eggs, and these were subsequently categorised as being either intact (0) or cracked (1). 3. A logistic regression of the probability of cracking vs K dyn revealed that as the K dyn measurement decreases below 15 000 N/m there is a rapid increase in the probability that an egg will crack during routine handling. 4. Additional variables (visit, egg weight,% damping and position in the house (battery [1 to 7], side [1, 2] and tier [1 to 8]) were also fitted to the model but only egg weight, visit and tier effects significantly improved the model fit. 5. This study confirms that the dynamic stiffness measurement can predict the probability of an egg cracking in the field and with high precision. As this measurement also has a high heritability, it could be incorporated into breeding programmes, where it would offer an excellent method to improve eggshell quality and reduce the incidence of cracked eggs.

show abstract

“…A few years ago, DeKetelaere et al published an extensive review of non-destructive measurements of egg quality [3]. Methods for egg crack detection can be divided into three categories: mechanical, machine vision, and vibration analysis.…”

Section: Introductionmentioning

confidence: 99%

Imaging system with modified-pressure chamber for crack detection in shell eggs

Lawrence

Yoon

Heitschmidt

et al. 2008

Sens. & Instrumen. Food Qual.

View full text Add to dashboard Cite

To detect checks and/or cracks in shell eggs, the egg industry is using high-speed acoustic systems. Prior to shipment, human graders candle a small subset of eggs to ensure that the high-speed systems are operating within specifications for a given grade of egg (e.g., Grade A large eggs). In addition to visual inspection, graders also listen for a dull, flat sound as an indicator of a crack when tapping eggs together. However, very small cracks, or micro-cracks can go undetected by the human graders. A method to detect egg checks/cracks with an imaging camera was developed. The system consisted of an imaging camera positioned above a clear inspection chamber that housed an egg and was illuminated from underneath. The chamber was designed so that a short, quick vacuum could be pulled to enhance the crack detection. High-resolution monochromatic images were collected at atmospheric pressure and under negative pressure. The negative pressure gradient was used to briefly open any existing cracks without inducing any new cracks in an intact egg. Initially, eggs were manually rotated three times to image the whole surface of the egg. The ratio of a negative-pressure image divided by an atmospheric-pressure image was used to highlight the cracks and simple image processing was used to identify a crack. A total of 80 cracked and 80 intact eggs were imaged with the system. Only one cracked egg was not detected, and this was because the crack was located on the air-cell end of the egg and was not visible by the camera. Thus, the system was 98.75% accurate in identifying cracked eggs and 100% accurate in identifying intact eggs. This initial phase of the research was successful and the system is being scaled up to image multiple eggs at a time.

show abstract

Non-destructive measurements of the egg quality

Cited by 71 publications

References 34 publications

Effect of Uniformity of Eggshell Thickness on Eggshell Quality in Chickens

Effect of Uniformity of Eggshell Thickness on Eggshell Quality in Chickens

Probability of an egg cracking during packing can be predicted using a simple non-destructive acoustic test

Imaging system with modified-pressure chamber for crack detection in shell eggs

Contact Info

Product

Resources

About