+

WO1995033991A1 - Indicateur d'etat - Google Patents

Indicateur d'etat Download PDF

Info

Publication number
WO1995033991A1
WO1995033991A1 PCT/GB1995/001345 GB9501345W WO9533991A1 WO 1995033991 A1 WO1995033991 A1 WO 1995033991A1 GB 9501345 W GB9501345 W GB 9501345W WO 9533991 A1 WO9533991 A1 WO 9533991A1
Authority
WO
WIPO (PCT)
Prior art keywords
indicator according
gas
circuit
vapour
indicator
Prior art date
Application number
PCT/GB1995/001345
Other languages
English (en)
Inventor
Peter Alfred Payne
Krishna Chandra Persaud
Original Assignee
Aromascan Plc
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 Aromascan Plc filed Critical Aromascan Plc
Priority to AU26279/95A priority Critical patent/AU2627995A/en
Publication of WO1995033991A1 publication Critical patent/WO1995033991A1/fr

Links

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
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D9/00—Recording measured values
    • G01D9/005—Solid-state data loggers
    • G01D9/007—Data loggers attached to transport containers for perishable products, e.g. food or medicines
    • 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

Definitions

  • This invention relates to a food or other contaminatable or perishable produce condition indicator.
  • Food and other consumable produce usually has a limited life and/or must be kept in prescribed conditions, for example, chilled or frozen.
  • prescribed conditions for example, chilled or frozen.
  • the present invention provides a labelling which does not suffer these disadvantages.
  • the invention comprises a food or other contam ⁇ inatable or perishable produce condition indicator comprising a tag adapted to be packaged with the produce and comprising sensing means for gas or vapour associated with decay or contamination affecting an electrical property or properties of said sensing means, an electrical circuit measuring said property or properties and an output from said circuit indicating detection of such gas or vapour.
  • the indicator may be sensitive to gas or vapour associated with bacterial contamination such as, for example, salmonella and/or listerella.
  • Said sensor means may comprise an array of sensor materials with different electrical responses to particular gases or vapours.
  • the sensor materials may comprise semi ⁇ conducting polymers.
  • Said output may comprise a connector for an interrogating instrument - said circuit may be at least in part comprised in said instrument.
  • Such an arrangement may be particularly useful in connection with commercial operations such for example as ware ⁇ housing and supermarkets, where incoming and stored goods can be checked by personnel equipped with the instrument, the goods usually in such cases being bulk consignments where, say, a wholesale carton may be checked on arrival or periodically in store.
  • the indicator may be complete in itself, to which end said output may comprise a visual display mounted on the tag, and may be a liquid crystal display.
  • the circuit may be comprised on the tag and may comprise bridge circuit means operative to detect changes in the resistance of groups of sensors selected so that the combined resistance change is sufficient to cause said output to indicate detection of a pre ⁇ determined gas or vapour.
  • the indicator may comprise a wafer-like support on which said sensor means are carried, and said electrical circuit may be printed on said support, which may also carry a battery power source of the kind, perhaps, that is used to power novelty greetings cards, so that the whole device can be made in credit card dimensions.
  • a battery state indicator may be included, which may simply comprise a disappearance of the visual display, it being taken that battery life exceeds shelf-life.
  • a solar cell could be used as the power source, as, indeed, is done on some credit-card size calculators. Since cost is a factor, economies of scale may be had by making one standard indicator device which is sensitive to gases or vapours associated with all the usual bacterial or fungal contaminants and with the decay of the majority of foodstuffs.
  • Figure 1 is a diagrammatic illustration of a first embodiment
  • Figure 2 is a diagrammatic illustration of a second embodiment
  • Figure 3 is a diagrammatic illustration of a third embodiment.
  • the drawings illustrate food or other contamin- atable or perishable produce condition indicators comprising a tag 11 - of about credit card size - adapted to be packaged with the produce and comprising sensor means 12 for gas or vapour associated with decay or contamination affecting an electrical property or properties of said sensor means 12, an electrical circuit 13 measuring said property or properties and an output 14 from said circuit indicating detection of such gas or vapour.
  • the sensor means 12 can comprise an array of sensor elements 15 of, for example, semiconducting polymer such as polypyrroles which change an electrical property such as resistance or impedance on exposure to gases.
  • An array of different such polymers, included as circuit elements in an electrical circuit, will exhibit a spectrum of responses to different gases or vapours.
  • Bacteria such as salmonella and listerella, have associated gases or vapours arising from metabolic processes that affect some of these semiconducting polymers.
  • Instruments are known in which an array of such sensitive materials responds to different gases or vapours and the response recorded in a library or used to train a neural net so that the instrument can be used to detect such gas or vapour.
  • a typical array might comprise some twenty different materials, and the large number of different combinations of responses enables the identification of large numbers of gases or vapours or mixtures thereof provided the computing power is available.
  • the computing power may be limited, but the number of gases or vapours required to be detected will be relatively small, and it may be sufficient to indicate only that the item monitored is safe or unsafe without identifying the particular cause. Less sophisticated computation is needed, therefore, than in a general purpose instrument.
  • a group of such, known all to increase in conductivity for example, on exposure to gases associated with harmful bacteria, can be arranged in a bridge circuit which measures the combined resistance change and, if it is sufficient, it unbalances the bridge circuit to cause the output 14 to indicate detection of such gases, or at least of unknown gases or vapours which are unexpected and which could be harmful.
  • the output 14 comprises simply a connector for an interrogating instrument - not shown, but which might be a computer or hand-held device programmed to interpret readings from the sensor elements 15 and which may include at least part of the circuit 13, for example a neural net, which might be configured in hardware or software.
  • the output 14 comprises a visual display mounted on the tag, in the form of an led panel, and the circuit is also comprised, as by being printed and/or applied using techniques appropriate to the production of semiconductor device such as diodes and transistors.
  • the sensor elements 15 are deposited in any suitable manner across electrodes printed on the tag, and the embodiment of Figure 1 also has a battery power source 16 of the kind used in novelty greetings cards and which can be contained within the compass of a credit card size device.
  • a battery power source 16 of the kind used in novelty greetings cards and which can be contained within the compass of a credit card size device.
  • a battery state indicator can be added, which can take the form of a mark on the output display 14.
  • the battery life should exceed the longest safe shelf life of the item in question, absence of a battery state mark indicating that both battery and shelf-life are exhausted.
  • Figure 2 illustrates an indicator which is powered by a photovoltaic panel 17, which will generate an operating current when the indicator is examined under illumination. If the circuit 13 is hard wired and/or incorporates magnetically stored data, for example in bubble memory, then it will not be necessary for power to be available on a continuous basis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Combustion & Propulsion (AREA)
  • Medical Informatics (AREA)
  • Packages (AREA)

Abstract

L'invention concerne un indicateur de l'état d'une denrée alimentaire ou d'un autre produit périssable ou pouvant être contaminé, cet indicateur comprenant une étiquette conçue pour être emballée avec le produit, et un élément détecteur de gaz ou de vapeur associé à la décomposition ou la contamination du produit modifiant une ou plusieurs propriétés électriques de l'élément détecteur, un circuit électrique mesurant cette ou ces propriétés, et une sortie du circuit indiquant la détection du gaz ou vapeur.
PCT/GB1995/001345 1994-06-09 1995-06-09 Indicateur d'etat WO1995033991A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26279/95A AU2627995A (en) 1994-06-09 1995-06-09 Condition indicator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9411514A GB9411514D0 (en) 1994-06-09 1994-06-09 Condition indicator
GB9411514.4 1994-06-09

Publications (1)

Publication Number Publication Date
WO1995033991A1 true WO1995033991A1 (fr) 1995-12-14

Family

ID=10756424

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001345 WO1995033991A1 (fr) 1994-06-09 1995-06-09 Indicateur d'etat

Country Status (3)

Country Link
AU (1) AU2627995A (fr)
GB (1) GB9411514D0 (fr)
WO (1) WO1995033991A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6537802B1 (en) * 1999-06-18 2003-03-25 Board Of Trustees Of Michigan State University Method and apparatus for the detection of volatile products in a sample
WO2003044521A1 (fr) * 2001-11-19 2003-05-30 Valtion Teknillinen Tutkimuskeskus Detecteur d'alteration rfid pour produits alimentaires et medicaments emballes
WO2002033404A3 (fr) * 2000-10-19 2003-08-07 Kenneth B Trauner Détecteur intégré de qualité du vin
US6767732B2 (en) * 2000-06-12 2004-07-27 Board Of Trustees Of Michigan State University Method and apparatus for the detection of volatile products in a sample
US7153532B1 (en) 1998-08-28 2006-12-26 Johnson Matthey Public Limited Company Sensing gaseous substances using metal complexes
US7714593B2 (en) 2003-12-18 2010-05-11 Upm-Kymmene Corporation Radiofrequency based sensor arrangement and a method
CN105980849A (zh) * 2014-02-24 2016-09-28 英诺斯森提亚公司 印刷气体传感器及其数字到期日期
US10260956B2 (en) 2012-06-15 2019-04-16 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
US11739362B2 (en) 2017-04-04 2023-08-29 Fresh Check Ltd. Colour changing compositions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0449798A2 (fr) * 1990-03-27 1991-10-02 AVL Medical Instruments AG Procédé pour contrôler la qualité de substances organiques emballées et matériau d'emballage pour la réalisation du procédé
WO1993003355A1 (fr) * 1991-07-29 1993-02-18 Neotronics Limited Dispositif de detection de produits volatils

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0449798A2 (fr) * 1990-03-27 1991-10-02 AVL Medical Instruments AG Procédé pour contrôler la qualité de substances organiques emballées et matériau d'emballage pour la réalisation du procédé
WO1993003355A1 (fr) * 1991-07-29 1993-02-18 Neotronics Limited Dispositif de detection de produits volatils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
P.-M. SCHWEIZER-BERBERICH, ET AL.: "CHARACTERISATION OF FOOD FRESHNESS WITH SENSOR ARRAYS", SENSORS AND ACTUATORS. B CHEMICAL, vol. b18, no. 1/3, LAUSANNE CH, pages 282 - 290, XP000450920 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153532B1 (en) 1998-08-28 2006-12-26 Johnson Matthey Public Limited Company Sensing gaseous substances using metal complexes
US6537802B1 (en) * 1999-06-18 2003-03-25 Board Of Trustees Of Michigan State University Method and apparatus for the detection of volatile products in a sample
US6767732B2 (en) * 2000-06-12 2004-07-27 Board Of Trustees Of Michigan State University Method and apparatus for the detection of volatile products in a sample
WO2002033404A3 (fr) * 2000-10-19 2003-08-07 Kenneth B Trauner Détecteur intégré de qualité du vin
WO2003044521A1 (fr) * 2001-11-19 2003-05-30 Valtion Teknillinen Tutkimuskeskus Detecteur d'alteration rfid pour produits alimentaires et medicaments emballes
US7714593B2 (en) 2003-12-18 2010-05-11 Upm-Kymmene Corporation Radiofrequency based sensor arrangement and a method
US10260956B2 (en) 2012-06-15 2019-04-16 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
US10816410B2 (en) 2012-06-15 2020-10-27 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
US11788897B2 (en) 2012-06-15 2023-10-17 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
US11821798B2 (en) 2012-06-15 2023-11-21 Freshpoint Quality Assurance Ltd. Time and/or temperature sensitive devices and methods of use thereof
CN105980849A (zh) * 2014-02-24 2016-09-28 英诺斯森提亚公司 印刷气体传感器及其数字到期日期
US11739362B2 (en) 2017-04-04 2023-08-29 Fresh Check Ltd. Colour changing compositions

Also Published As

Publication number Publication date
GB9411514D0 (en) 1994-08-03
AU2627995A (en) 1996-01-04

Similar Documents

Publication Publication Date Title
EP1829003B1 (fr) Etiquette rfid munie d'un indicateur visuel d'exposition aux conditions environnementales
CA2783966A1 (fr) Indicateur de securite alimentaire
Ghaani et al. An overview of the intelligent packaging technologies in the food sector
US5869341A (en) Detection of contaminants in food
US6190610B1 (en) Detection of contaminants in food
US6725180B2 (en) Environmental monitoring system
US7004621B2 (en) Method of monitoring temperature exposure
EP1006358A1 (fr) Détection de contaminants dans les aliments
DE3880694D1 (de) Anordnung fuer druckeinrichtungen zur ueberwachung von druckmedium enthaltenden vorratsbehaeltern.
KR20040073476A (ko) 부패하기 쉬운 상품을 위한 환경 파라미터 지시자
WO1995033991A1 (fr) Indicateur d'etat
JP7462682B2 (ja) 製品のモニタリング
WO1998014777A9 (fr) Detection de contaminants dans les aliments
EP1446663A1 (fr) Detecteur d'alteration rfid pour produits alimentaires et medicaments emballes
EP0699304A1 (fr) Detection de contaminants dans les aliments
KR870008268A (ko) 전자식 금전 등록기
US11205108B2 (en) Symbol verification for an intelligent label device
EP3329669A2 (fr) Vérification de symbole pour un dispositif d'étiquette intelligent
US20110140830A1 (en) Temperature Tracking Device and Method Using Same
JP6848365B2 (ja) 物流管理システム
US20210341340A1 (en) System and method for monitoring a container environment
US20070010006A1 (en) System and method for detecting biohazardous threats
Kramar et al. Smart-fish system for fresh fish cold chain transportation—Overall approach and selection of sensor materials
Garg et al. Food spoilage detection system using Arduino
FARQUHAR TIME‐TEMPERATURE INDICATORS IN MONITORING THE DISTRIBUTION OF FROZEN FOODS 1

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW MX NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载