CA2384831A1 - Apparatus and method for detection of foreign bodies in products - Google Patents

Apparatus and method for detection of foreign bodies in products Download PDF

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Publication number
CA2384831A1
CA2384831A1 CA002384831A CA2384831A CA2384831A1 CA 2384831 A1 CA2384831 A1 CA 2384831A1 CA 002384831 A CA002384831 A CA 002384831A CA 2384831 A CA2384831 A CA 2384831A CA 2384831 A1 CA2384831 A1 CA 2384831A1
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CA
Canada
Prior art keywords
signals
detection
foreign bodies
relates
reference value
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.)
Granted
Application number
CA002384831A
Other languages
French (fr)
Other versions
CA2384831C (en
Inventor
Harald Merkel
Mikael Reimers
Christina Skjoldebrand
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.)
Food Radar System in Sweden AB
Original Assignee
Individual
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
Priority claimed from SE9903348A external-priority patent/SE517315C2/en
Application filed by Individual filed Critical Individual
Publication of CA2384831A1 publication Critical patent/CA2384831A1/en
Application granted granted Critical
Publication of CA2384831C publication Critical patent/CA2384831C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

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)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The present invention relates to an apparatus for detection of foreign bodies or changes in material properties and contents in a product, comprising a first antenna device for transmitting electromagnetic signals in the microwave range, said signals comprise at least two signals at different frequencies, a second antenna device for receiving signals originating from said first antenna, said received signals, at least partially, passes through said product, means for measuring at least amplitude and phase information of said received signals for each separate frequency, so as to obtain parameter values, means for comparing the parameter value with the corresponding amplitude and phase information of said transmitted signals, so as to obtain a comparison value for each of said frequencies, means for analysing each comparison value based on a reference value, which reference value is accessible to said apparatus, and means for emitting a signal when said comparison value differs a predetermined amount from said reference value.
The invention also relates to a method for detection of foreign bodies in products. The invention also relates to a method using said apparatus.
CA002384831A 1999-09-17 2000-09-14 Apparatus and method for detection of foreign bodies in products Expired - Lifetime CA2384831C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9903348-2 1999-09-17
SE9903348A SE517315C2 (en) 1999-09-17 1999-09-17 Apparatus and method for detecting foreign bodies in products
US09/506,832 2000-02-18
US09/506,832 US6456093B1 (en) 1999-09-17 2000-02-18 Apparatus and method for detection of foreign bodies in products
PCT/SE2000/001783 WO2001020311A1 (en) 1999-09-17 2000-09-14 Apparatus and method for detection of foreign bodies in products

Publications (2)

Publication Number Publication Date
CA2384831A1 true CA2384831A1 (en) 2001-03-22
CA2384831C CA2384831C (en) 2009-05-19

Family

ID=26663649

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002384831A Expired - Lifetime CA2384831C (en) 1999-09-17 2000-09-14 Apparatus and method for detection of foreign bodies in products

Country Status (4)

Country Link
EP (1) EP1214581A1 (en)
AU (1) AU770854B2 (en)
CA (1) CA2384831C (en)
WO (1) WO2001020311A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10100664A1 (en) * 2001-01-09 2002-07-11 Hauni Maschinenbau Ag Procedure for testing a production material
WO2006088423A1 (en) * 2005-02-18 2006-08-24 Food Radar System In Sweden Ab A system and method for detecting foreign objects in a product
CN102621161B (en) * 2012-03-31 2013-10-16 中国科学院长春应用化学研究所 Method for obtaining material performance parameter
JP6868302B2 (en) * 2017-03-17 2021-05-12 国立研究開発法人産業技術総合研究所 Non-destructive detection method, non-destructive detection device and non-destructive detection program
CN110161057B (en) * 2019-05-09 2023-07-25 浙江浙能数字科技有限公司 Device and method for detecting foreign matters on coal conveying belt based on microwave transceiver
CN111896559B (en) * 2020-08-21 2022-11-25 爱德森（厦门）电子有限公司 Point frequency type detection method for property decay of invisible material and system device thereof
CN116106334B (en) * 2023-04-13 2023-06-09 中国民航大学 RFID-based nondestructive detection method for water content of article

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326163A (en) * 1980-01-30 1982-04-20 Brooke Robert L High speed bulk grain moisture measurement apparatus
SE449138B (en) * 1984-06-27 1987-04-06 Stiftelsen Inst Mikrovags PROCEDURAL EQUIPMENT FOR DETERMINATION OF MICROVAGORS DIMENSION AND / OR PHASE DISTRIBUTION DURING TRANSMISSION BY A MATERIAL
DE3531893A1 (en) * 1985-09-06 1987-03-19 Siemens Ag METHOD FOR DETERMINING THE DISTRIBUTION OF DIELECTRICITY CONSTANTS IN AN EXAMINATION BODY, AND MEASURING ARRANGEMENT FOR IMPLEMENTING THE METHOD
DE3723606A1 (en) * 1987-07-17 1989-01-26 Kernforschungsz Karlsruhe METHOD AND DEVICE FOR ANALYSIS BY MEANS OF MICROWAVES
GB9122210D0 (en) * 1991-10-18 1991-11-27 Marconi Gec Ltd Method for measurement of the gas and water content in oil
JP3139874B2 (en) * 1993-03-30 2001-03-05 株式会社東芝 Densitometer
DE4311103A1 (en) * 1993-04-05 1994-10-06 Komi Koppelberg & Migl Kg Method and device for recognising faults in glass bodies
NL9500018A (en) * 1995-01-04 1996-08-01 Proval Beheer B V Device for determining by radiation the quality of irradiable bodies.
US5886534A (en) * 1995-10-27 1999-03-23 The University Of Chicago Millimeter wave sensor for on-line inspection of thin sheet dielectrics
SE512315C2 (en) * 1997-01-17 2000-02-28 Lars Baaaath Method for charting lack of homogenities in wood
NZ503713A (en) * 1997-09-25 2001-09-28 Jack R Little Jr Nondestructive testing of dielectric materials by observing the interference pattern of reflected microwaves to find material flaws
DE29719600U1 (en) * 1997-11-05 1998-01-02 RGI Industriemeßgeräte GmbH, 75323 Bad Wildbad Device for detecting inhomogeneities, in particular foreign bodies, in a material layer to be checked
JP2000111499A (en) * 1998-10-02 2000-04-21 Toshiba Fa Syst Eng Corp Microwave concentration-measuring device

Also Published As

Publication number Publication date
EP1214581A1 (en) 2002-06-19
AU7568000A (en) 2001-04-17
CA2384831C (en) 2009-05-19
AU770854B2 (en) 2004-03-04
WO2001020311A1 (en) 2001-03-22

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MKEX Expiry

Effective date: 20200914