WO2013157946A1 - Procédé de détection de défauts de produits alimentaires - Google Patents

Procédé de détection de défauts de produits alimentaires Download PDF

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Publication number
WO2013157946A1
WO2013157946A1 PCT/NL2013/050286 NL2013050286W WO2013157946A1 WO 2013157946 A1 WO2013157946 A1 WO 2013157946A1 NL 2013050286 W NL2013050286 W NL 2013050286W WO 2013157946 A1 WO2013157946 A1 WO 2013157946A1
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WO
WIPO (PCT)
Prior art keywords
value
exposure
transmission measurement
eggs
exclusively
Prior art date
Application number
PCT/NL2013/050286
Other languages
English (en)
Inventor
Rogier VAN DOELAN
Gerrit Hout
Original Assignee
Moba Group B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moba Group B.V. filed Critical Moba Group B.V.
Publication of WO2013157946A1 publication Critical patent/WO2013157946A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/08—Eggs, e.g. by candling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/08—Eggs, e.g. by candling
    • G01N33/085—Eggs, e.g. by candling by candling

Definitions

  • the present invention relates to a method for detecting defects in food products, more particularly for detecting blood in eggs, as described in the preamble of claim 1.
  • a method is known from, e.g., WO2006031100.
  • LED Light Emitting Diode
  • This prior art document describes, in particular, detecting blood and thereby characterizing a great many successive eggs, the intention being that the measuring value found can be used as a sorting criterion.
  • candling with LEDs for this purpose can be applied to food products in general, provided that these products exhibit a certain transmittance of light or, more generally, of
  • electromagnetic radiation to be considered here are not only eggs, but also vegetables, fruits, and, for instance, but not exclusively, particular kinds of meat, fish, and mollusks.
  • wavelength regions in the visible part of the electromagnetic spectrum basically extending between 300 and 700 nm, this may mean that exposure times or exposure intensities need to be set at generally high values. It has appeared that precisely in this wavelength region absorption occurs that characterizes the properties of these food products. Furthermore, it should be noted that, for instance for fruit, the infrared, and the near-infrared region, are also of great importance, for instance as described in EP 1285244. It will be clear to those skilled in the art that the non-transmittance mentioned plays a role especially because of the enormous diversity among products of the same kind. In the case of egg sorting, processing capacities of sorting machines may run up to approximately 200,000 eggs per hour.
  • composition of eggshells, colors of eggshells, and composition and color of egg yoke can exhibit considerable differences.
  • various measures have been devised, for instance, as described in the above-mentioned WO2006031100, or also in EP993611.
  • analyzing further comprises determining the amount of transmitted radiation, comparing it with a set threshold value, and, based on the comparison, adjusting it to a preset value for transmission
  • the present method is highly suitable for sorting large amounts of products, such as eggs, that need to permit of mutual comparison, and where incorrect sorting decisions are to be avoided as much as possible.
  • the method according to the present invention has one or more of the following features:
  • an exposure input value Ii for exposure is started with that is lower than the transmission measurement value Im mentioned;
  • Ii is adjusted stepwise to Im with preset steps ⁇ ; and that exposure is carried out with LED lighting, whereby adjusting comprises the LED setting current.
  • the invention relates to a method for sorting eggs, in which the method according to any one of the preceding claims is used.
  • FIG. 1 shows an example of a plot of the adjustment of a few measuring signals according to a non-limiting exemplary embodiment of the method of the present invention.
  • FIG. 1 shows
  • the intensity I of light transmitted by an egg called Im above, expressed in units of electrical voltage (i.e., a voltage produced by the light intensity meter), mV, with a voltage difference of 50 mV for each small block demarcated along this axis.
  • the large blocks are marked accordingly: along the time axis large blocks of 400 ⁇ , and along the intensity axis large blocks of 250 mV.
  • FIG. 1 the measuring signals of transmission measurement and adjustment of two successive eggs are shown.
  • the light used comes from a LED having the same wavelength region for each of the two eggs.
  • a setting value 10 is shown which, in this case, is the measuring value at non-exposure, in short, in a generally dark environment, to thus determine a minimum level.
  • a threshold value is set.
  • an exposure input value Ii is measured, which, in this case, appears to be lower than the preset and to-be-attained measuring value Im, and which is denoted Iii for this first egg.
  • the measured amount of transmitted radiation here expressed in detector units, mV
  • the set threshold value of transmitted radiation
  • LED-light is adjusted in seven steps until the value Im is reached, each step providing an increase of intensity ⁇ of between 50 and 100 mV.
  • This last may be caused, for instance, by the egg-inherent anisotropy for transmission of light, for instance density differences in the egg and/or the eggshell.
  • a lower exposure input value I12 is measured.
  • the value Im is reached in seven subsequent steps (after a comparison with the set threshold value).
  • a measuring time of approximately 800 ⁇ is utilized for each of these eggs.
  • selecting and attaining the value Im the following can be noted. Selecting this value preferably depends on the measuring range of the detector used. This means that in general a value is selected somewhere between the extremes thereof (i.e., between a lower limit and an upper limit of the measuring range).
  • a guideline preferably used in this regard is a value of approximately 75% of the measuring range of the detector used (i.e., Im, the set threshold value, is set to approximately 75% of the detector measuring range, with 100% being an upper limit of the detector measuring range and 0% being a lower limit of the detector measuring range).
  • the value Im may be exceeded upon raising, or also upon lowering.
  • a spectrophotometer will be used, well known to those skilled in this field of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un procédé pour détecter des défauts dans des produits alimentaires, par exemple, mais non exclusivement, la détection de sang dans des œufs, comprenant : - l'exposition d'un seul produit à un rayonnement électromagnétique, par exemple, mais non exclusivement, de la lumière d'au moins une bande de longueur d'onde prédéterminée, au moins une partie de la lumière éclairant ledit produit alimentaire, - l'analyse du rayonnement électromagnétique transmis, et - la caractérisation du produit selon le rayonnement transmis, l'analyse comprenant en outre la détermination de la quantité de rayonnement transmis, sa comparaison avec une valeur de seuil fixée et, selon la comparaison, son ajustement à une valeur préétablie pour la mesure de transmission, la valeur de mesure de transmission Im.
PCT/NL2013/050286 2012-04-20 2013-04-19 Procédé de détection de défauts de produits alimentaires WO2013157946A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12002763 2012-04-20
EP12002763.6 2012-04-20

Publications (1)

Publication Number Publication Date
WO2013157946A1 true WO2013157946A1 (fr) 2013-10-24

Family

ID=48325838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2013/050286 WO2013157946A1 (fr) 2012-04-20 2013-04-19 Procédé de détection de défauts de produits alimentaires

Country Status (1)

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WO (1) WO2013157946A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063822A (en) * 1975-04-04 1977-12-20 Staalkat B.V. System for detecting a first light transmissive substance, such as for instance blood, in a second light transmissive, different substance
EP0738888A1 (fr) * 1995-04-19 1996-10-23 FPS Food Processing Systems B.V. Tête de soudage, appareil et méthode pour tester des oeufs
WO1999001762A1 (fr) * 1997-07-03 1999-01-14 Fps Food Processing Systems B.V. Procede et dispositif de detection de corps etranger dans les oeufs
EP1285244A1 (fr) 2000-03-13 2003-02-26 Autoline Inc Appareil et procede de mesure et de correlation de caracteristiques de fruits avec un spectre visible/infrarouge proche
US20030156273A1 (en) * 2002-02-08 2003-08-21 Kyowa Machinery Co., Ltd. Method and apparatus for detecting blood in shell eggs
WO2006031100A1 (fr) 2004-09-14 2006-03-23 Staalkat International B.V. Inspection d'oeufs pour detecter la presence de sang
WO2009033041A1 (fr) * 2007-09-07 2009-03-12 The United States Of America, As Represented By The Secretary Of Agriculture Systèmes de détection de micro-fêlures d'œuf

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063822A (en) * 1975-04-04 1977-12-20 Staalkat B.V. System for detecting a first light transmissive substance, such as for instance blood, in a second light transmissive, different substance
EP0738888A1 (fr) * 1995-04-19 1996-10-23 FPS Food Processing Systems B.V. Tête de soudage, appareil et méthode pour tester des oeufs
WO1999001762A1 (fr) * 1997-07-03 1999-01-14 Fps Food Processing Systems B.V. Procede et dispositif de detection de corps etranger dans les oeufs
EP0993611A1 (fr) 1997-07-03 2000-04-19 FPS Food Processing Systems B.V. Procede et dispositif de detection de corps etranger dans les oeufs
EP1285244A1 (fr) 2000-03-13 2003-02-26 Autoline Inc Appareil et procede de mesure et de correlation de caracteristiques de fruits avec un spectre visible/infrarouge proche
US20030156273A1 (en) * 2002-02-08 2003-08-21 Kyowa Machinery Co., Ltd. Method and apparatus for detecting blood in shell eggs
WO2006031100A1 (fr) 2004-09-14 2006-03-23 Staalkat International B.V. Inspection d'oeufs pour detecter la presence de sang
WO2009033041A1 (fr) * 2007-09-07 2009-03-12 The United States Of America, As Represented By The Secretary Of Agriculture Systèmes de détection de micro-fêlures d'œuf

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