WO2020081286A1 - Method for inspecting shrimp - Google Patents

Method for inspecting shrimp Download PDF

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Publication number
WO2020081286A1
WO2020081286A1 PCT/US2019/055152 US2019055152W WO2020081286A1 WO 2020081286 A1 WO2020081286 A1 WO 2020081286A1 US 2019055152 W US2019055152 W US 2019055152W WO 2020081286 A1 WO2020081286 A1 WO 2020081286A1
Authority
WO
WIPO (PCT)
Prior art keywords
booth
dark
radiation
visible light
peeled shrimps
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2019/055152
Other languages
French (fr)
Inventor
Byron M. FALGOUT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laitram LLC
Original Assignee
Laitram LLC
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 Laitram LLC filed Critical Laitram LLC
Priority to CN201980060002.0A priority Critical patent/CN112702919A/en
Publication of WO2020081286A1 publication Critical patent/WO2020081286A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/005—Grading or classifying shellfish or bivalves
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/023—Conveying, feeding or aligning shellfish
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/024—Opening, shelling or peeling shellfish
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/024—Opening, shelling or peeling shellfish
    • A22C29/026—Mechanically peeling and shelling shrimps, prawns or other soft-shelled crustaceans
    • 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
    • G01N33/12—Meat; Fish
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
    • A22C25/04—Sorting fish; Separating ice from fish packed in ice
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/021—Cleaning operations on shellfish, e.g. evisceration, brushing
    • A22C29/022—Deveining shellfish

Definitions

  • the invention relates generally to a method for inspecting peeled shrimps.
  • One method embodying features of the invention for inspecting peeled shrimps comprises: (a) providing a dark booth that blocks outside visible light from entering the booth's interior; (b) emitting ultraviolet (UV) radiation directed toward a group of peeled shrimps in the interior of the dark booth; (c) filtering out visible light in the UV radiation to produce filtered UV radiation; (d) irradiating the group of peeled shrimps in the interior of the dark booth with the filtered UV radiation to cause residual shell to fluoresce with visible light; and (e) providing a human operator in the dark booth to visually detect the visible light of fluorescing shell with the naked eye.
  • UV ultraviolet
  • FIG. 1 is a top plan schematic of an inspection system for inspecting peeled shrimp in culling and shell-detection stations embodying features of the invention
  • FIG. 2 is a block diagram of a UV source and a filter usable in the shell-detection station of FIG. 1;
  • FIG. 3A is the spectrum of the UV radiation emitted by the UV source of FIG. 2
  • FIG. 3B is the spectrum of the UV radiation of FIG. 3A after passing through a filter blocking visible light
  • FIG. 4A is the spectrum of the reflected radiation of a completely shelled shrimp
  • FIG. 4B is the spectrum of the reflected radiation of shrimp shell.
  • FIG. 1 Manual culling and shell-detection stations in a peeled-shrimp inspection system 8 are shown in FIG. 1 in a continuous system. Peeled shrimps 10 loaded onto a conveyor 12, such as a conveyor belt, are conveyed through a culling station 14. A human operator 16 manning the culling station 14 in ambient lighting culls unwanted shrimp bits and debris 18, 20 from the supply of shrimps 10 passing by and deposits the debris 18, 20 in a collection receptacle 22.
  • the conveyor 12, which may be one or more conveyor belts or a water trough, as just two examples, then conveys the peeled shrimps 10 into and through a dark booth 24.
  • the dark booth 24 prevents ambient visible light from entering the booth's interior 26.
  • a UV lamp 28 emits UV radiation 30 directed at the group of shrimps 10 in the booth 24 as also shown in FIG. 2.
  • the UV radiation 30 is filtered by a band-pass filter 32 to filter out visible light and produce filtered UV radiation 34 that irradiates the group of shrimps 10 in the dark booth 24.
  • the filtered UV radiation 34 irradiating the shrimps 10 causes residual shell 36 to fluoresce by shifting some of the UV radiation into the visible-light region of the spectrum.
  • the visible light from the fluorescing shell is visible to the naked human eye and so is detectable by a human operator 38 in the dark booth 24.
  • the human operator 38 in the dark booth removes those shrimps 10' with residual shell 36 from the group of shrimps 10 and deposits them in a reject receptacle 40 from which they can be returned to the peeler.
  • the shrimps 10 exiting the dark booth 24 are free of residual shell.
  • the dark booth 24 can be operated as a stand-alone quality-control station, in which samples of peeled shrimps are placed on a stationary support surface and inspected by the naked eye of an operator to detect fluorescing shell.
  • the dark booth 24 blocks enough ambient visible light from entering its interior 26 to ensure that the fluorescence of the shells is detectable by the naked eye. And it has been found that inexpensive UVa lamps, better known as black lights, cause enough fluorescence of the shells to be detectable. Besides being inexpensive, UVa lamps do not subject the human operator 38 in the dark booth 24 to unsafe levels of higher-frequency UV radiation.
  • FIG. 3A shows the spectrum of an unfiltered UVa lamp.
  • the spectrum is shown as a function of wavelength (L) rather than frequency. So, the longer wavelengths and lower frequencies are to the right in the graphs of the spectrum in FIGS. 3A-4B.
  • the unfiltered UVa radiation has a main band concentrated around 350 nm and some longer- wavelength bands in the visible light region of the spectrum.
  • the maximum energy of the UVa lamp in the main band occurs over a range 42 of ultraviolet wavelengths concentrated at about 350 nm just below the visible-light region 44 (about 380 nm to 740 nm).
  • the band-pass filter 32 (FIGS.
  • the filter also affects the spectrum of the main UVa lamp energy 42 with its peak at about 350 nm by shifting the spectral peak of the filtered UVa irradiating the shrimps to about 365 nm.
  • FIG. 4A shows the spectrum of reflected radiation horn completely shelled shrimps irradiated by the filtered UVa radiation of FIG. 3B.
  • FIG. 4B shows the spectrum of reflected radiation horn shell irradiated by the filtered UVa radiation of FIG. 3B.
  • the level 46 of the reflected radiation in the visible light region for completely shelled shrimp is lower than the level 48 of the reflected and fluorescent radiation horn fluorescing shell, which is detectable by the naked eye in the dark booth.
  • the peak energy of the main band of reflected UVa radiation horn shrimp shell as shown in FIG. 4B is much lower than the reflected UVa radiation horn completely shelled shrimps as shown in FIG. 4A indicating that much of the main band of incident UVa energy is absorbed by the shell and converted into higher- wavelength fluorescent light easily visible to the naked eye.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

A method for inspecting peeled shrimp by human operators in a culling station illuminated by ambient visible light and in a dark shell-detection booth illuminated by ultraviolet (UV) lamps. The UV radiation emitted by the lamps is filtered to remove visible light from the filtered UV irradiating the shrimp in the dark booth. Irradiated shrimp shell fluoresces and is detectable by the naked eye. A human operator in the dark booth detects the fluorescing shell and removes those shrimps.

Description

METHOD FOR INSPECTING SHRIMP
BACKGROUND
The invention relates generally to a method for inspecting peeled shrimps.
In the bulk processing of shrimp, automated shrimp peelers remove heads, appendages, and shells from the shrimp. Although the peeling process is generally thorough, some shrimps are left with residual shell. To improve the quality of the final product, shrimps with residual shell are culled from the completely peeled shrimp.
Detection of residual shell is often done by visual inspection. But transparent residual shell is not always easy to notice. SUMMARY
One method embodying features of the invention for inspecting peeled shrimps comprises: (a) providing a dark booth that blocks outside visible light from entering the booth's interior; (b) emitting ultraviolet (UV) radiation directed toward a group of peeled shrimps in the interior of the dark booth; (c) filtering out visible light in the UV radiation to produce filtered UV radiation; (d) irradiating the group of peeled shrimps in the interior of the dark booth with the filtered UV radiation to cause residual shell to fluoresce with visible light; and (e) providing a human operator in the dark booth to visually detect the visible light of fluorescing shell with the naked eye.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan schematic of an inspection system for inspecting peeled shrimp in culling and shell-detection stations embodying features of the invention;
FIG. 2 is a block diagram of a UV source and a filter usable in the shell-detection station of FIG. 1;
FIG. 3A is the spectrum of the UV radiation emitted by the UV source of FIG. 2, and FIG. 3B is the spectrum of the UV radiation of FIG. 3A after passing through a filter blocking visible light; and
FIG. 4A is the spectrum of the reflected radiation of a completely shelled shrimp, and FIG. 4B is the spectrum of the reflected radiation of shrimp shell. DETAILED DESCRIPTION
Manual culling and shell-detection stations in a peeled-shrimp inspection system 8 are shown in FIG. 1 in a continuous system. Peeled shrimps 10 loaded onto a conveyor 12, such as a conveyor belt, are conveyed through a culling station 14. A human operator 16 manning the culling station 14 in ambient lighting culls unwanted shrimp bits and debris 18, 20 from the supply of shrimps 10 passing by and deposits the debris 18, 20 in a collection receptacle 22. The conveyor 12, which may be one or more conveyor belts or a water trough, as just two examples, then conveys the peeled shrimps 10 into and through a dark booth 24.
The dark booth 24 prevents ambient visible light from entering the booth's interior 26. A UV lamp 28 emits UV radiation 30 directed at the group of shrimps 10 in the booth 24 as also shown in FIG. 2. The UV radiation 30 is filtered by a band-pass filter 32 to filter out visible light and produce filtered UV radiation 34 that irradiates the group of shrimps 10 in the dark booth 24. The filtered UV radiation 34 irradiating the shrimps 10 causes residual shell 36 to fluoresce by shifting some of the UV radiation into the visible-light region of the spectrum. The visible light from the fluorescing shell is visible to the naked human eye and so is detectable by a human operator 38 in the dark booth 24. The human operator 38 in the dark booth removes those shrimps 10' with residual shell 36 from the group of shrimps 10 and deposits them in a reject receptacle 40 from which they can be returned to the peeler.
The shrimps 10 exiting the dark booth 24 are free of residual shell.
As an alternative, the dark booth 24 can be operated as a stand-alone quality-control station, in which samples of peeled shrimps are placed on a stationary support surface and inspected by the naked eye of an operator to detect fluorescing shell.
The dark booth 24 blocks enough ambient visible light from entering its interior 26 to ensure that the fluorescence of the shells is detectable by the naked eye. And it has been found that inexpensive UVa lamps, better known as black lights, cause enough fluorescence of the shells to be detectable. Besides being inexpensive, UVa lamps do not subject the human operator 38 in the dark booth 24 to unsafe levels of higher-frequency UV radiation.
FIG. 3A shows the spectrum of an unfiltered UVa lamp. The spectrum is shown as a function of wavelength (L) rather than frequency. So, the longer wavelengths and lower frequencies are to the right in the graphs of the spectrum in FIGS. 3A-4B. The unfiltered UVa radiation has a main band concentrated around 350 nm and some longer- wavelength bands in the visible light region of the spectrum. The maximum energy of the UVa lamp in the main band occurs over a range 42 of ultraviolet wavelengths concentrated at about 350 nm just below the visible-light region 44 (about 380 nm to 740 nm). The band-pass filter 32 (FIGS. 1 and 2) filters out the visible light above about 400 nm, as well as shorter- wavelength radiation below about 310 nm, as shown in the spectrum of the filtered UVa radiation in FIG. 3B to make the fluorescence of shell easier to see. The filter also affects the spectrum of the main UVa lamp energy 42 with its peak at about 350 nm by shifting the spectral peak of the filtered UVa irradiating the shrimps to about 365 nm.
FIG. 4A shows the spectrum of reflected radiation horn completely shelled shrimps irradiated by the filtered UVa radiation of FIG. 3B. FIG. 4B shows the spectrum of reflected radiation horn shell irradiated by the filtered UVa radiation of FIG. 3B. The level 46 of the reflected radiation in the visible light region for completely shelled shrimp is lower than the level 48 of the reflected and fluorescent radiation horn fluorescing shell, which is detectable by the naked eye in the dark booth. The peak energy of the main band of reflected UVa radiation horn shrimp shell as shown in FIG. 4B is much lower than the reflected UVa radiation horn completely shelled shrimps as shown in FIG. 4A indicating that much of the main band of incident UVa energy is absorbed by the shell and converted into higher- wavelength fluorescent light easily visible to the naked eye.

Claims

WHAT IS CLAIMED IS:
1. A method for inspecting peeled shrimps comprising:
providing a dark booth blocking outside visible light from entering the interior of the dark booth;
emitting UV radiation directed toward a group of peeled shrimps in the interior of the dark booth;
filtering out visible light in the UV radiation to produce filtered UV radiation;
irradiating the group of peeled shrimps in the interior of the dark booth with the filtered UV radiation to cause residual shell on the peeled shrimps to fluoresce with visible light;
providing a human operator in the dark booth to visually detect the visible light of fluorescing shell with the naked eye.
2. The method as claimed in claim 1 wherein the human operator removes peeled shrimps with residual shell from the group of peeled shrimps in the dark booth.
3. The method as claimed in claim 1 comprising conveying peeled shrimps through the interior of the dark booth on a conveyor belt.
4. The method as claimed in claim 1 comprising conveying peeled shrimps through the interior of the dark booth in a water trough.
5. The method as claimed in claim 1 comprising supporting the group of peeled shrimps in the interior of the dark booth on a stationary support surface.
6. The method as claimed in claim 1 wherein the UV radiation is UVa radiation.
7. The method as claimed in claim 1 comprising a culling station outside the dark booth wherein unwanted shrimp parts and other debris are visually detected by human eye under ambient visible light and manually removed from peeled shrimps before the peeled shrimps enter the dark booth.
PCT/US2019/055152 2018-10-17 2019-10-08 Method for inspecting shrimp Ceased WO2020081286A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980060002.0A CN112702919A (en) 2018-10-17 2019-10-08 Method for inspecting shrimp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16/163,030 2018-10-17
US16/163,030 US10433566B1 (en) 2018-10-17 2018-10-17 Method for inspecting shrimp

Publications (1)

Publication Number Publication Date
WO2020081286A1 true WO2020081286A1 (en) 2020-04-23

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021178111A1 (en) * 2020-03-04 2021-09-10 Laitram, L.L.C. Shrimp processing system
CN114324034B (en) * 2021-12-13 2023-09-26 华南农业大学 A device for detecting qualification rate of shrimp peeling based on multi-touch recognition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736716B1 (en) * 1999-07-23 2004-05-18 Mutsu Kaden Tokki Co., Ltd. Shell processing method and shell processing device used in the method
US6808448B1 (en) * 1999-09-08 2004-10-26 Nichirei Corporation Method and device for detecting/removing crustacean with untorn shell
US7195551B2 (en) * 2002-08-30 2007-03-27 Conagra Foods, Inc. Casingless food production methods, systems, and associated wrappable coverings
US8033898B2 (en) * 2003-06-24 2011-10-11 Albemarle Corporation Microbiocidal control in the processing of meat-producing four-legged animals
US9930896B2 (en) * 2012-12-19 2018-04-03 Laitram, L.L.C. Shrimp processing system and methods

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6914250B2 (en) * 1997-03-07 2005-07-05 Clare Chemical Research, Inc. Fluorometric detection using visible light
AU2008202491A1 (en) * 1998-03-03 2008-08-28 Iowa State University Research Foundation, Inc. Method and system for detecting fecal and ingesta contamination on the carcasses of meat animals
US6410872B2 (en) * 1999-03-26 2002-06-25 Key Technology, Inc. Agricultural article inspection apparatus and method employing spectral manipulation to enhance detection contrast ratio
US7145649B2 (en) * 2000-12-21 2006-12-05 Brasscorp Limited Method of producing an ultra-violet or near ultra-violet light source for non-destructive inspection or testing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736716B1 (en) * 1999-07-23 2004-05-18 Mutsu Kaden Tokki Co., Ltd. Shell processing method and shell processing device used in the method
US6808448B1 (en) * 1999-09-08 2004-10-26 Nichirei Corporation Method and device for detecting/removing crustacean with untorn shell
US7195551B2 (en) * 2002-08-30 2007-03-27 Conagra Foods, Inc. Casingless food production methods, systems, and associated wrappable coverings
US8033898B2 (en) * 2003-06-24 2011-10-11 Albemarle Corporation Microbiocidal control in the processing of meat-producing four-legged animals
US9930896B2 (en) * 2012-12-19 2018-04-03 Laitram, L.L.C. Shrimp processing system and methods

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US10433566B1 (en) 2019-10-08
CN112702919A (en) 2021-04-23

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