WO2008085060A1 - Method for detecting the liquid level in an inner container - Google Patents

Method for detecting the liquid level in an inner container Download PDF

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Publication number
WO2008085060A1
WO2008085060A1 PCT/NO2008/000006 NO2008000006W WO2008085060A1 WO 2008085060 A1 WO2008085060 A1 WO 2008085060A1 NO 2008000006 W NO2008000006 W NO 2008000006W WO 2008085060 A1 WO2008085060 A1 WO 2008085060A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
outer container
capacitor
inner container
liquid level
Prior art date
Application number
PCT/NO2008/000006
Other languages
French (fr)
Inventor
Olav Ellingsen
Bjarte S. Ellingsen
Original Assignee
Multisense As
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 NO20075220A external-priority patent/NO333309B1/en
Application filed by Multisense As filed Critical Multisense As
Priority to SE0900938A priority Critical patent/SE534295C2/en
Publication of WO2008085060A1 publication Critical patent/WO2008085060A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
    • B65D77/06—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers
    • B65D77/062—Flexible containers disposed within polygonal containers formed by folding a carton blank
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2203/00—Decoration means, markings, information elements, contents indicators
    • B65D2203/04—Level indicators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2207/00—Application of thermometers in household appliances
    • G01K2207/02—Application of thermometers in household appliances for measuring food temperature
    • G01K2207/08—Application of thermometers in household appliances for measuring food temperature with food recipients having temperature sensing capability
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2215/00—Details concerning sensor power supply
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2217/00—Temperature measurement using electric or magnetic components already present in the system to be measured

Definitions

  • the present invention relates to method for measuring the contents of a liquid in special containers such as wine boxes and similar containers for liquids.
  • the invention further relates to containers suitable for carrying out such a method.
  • a BIB consists of a paperboard or like carton with a bag of plastic or the like arranged therein which contains the actual wine.
  • a typical size for a BIB is 3 litres.
  • BIBs have become very popular, partly because the wine keeps well even after it has started to be dispensed. This is because the bag inside the carton which contains the wine collapses as the wine is dispensed without allowing any air to enter, which is what happens when wine is poured from a bottle. If the wine comes into contact with air for a longish period of time, the air spoils the wine as the wine becomes oxidised.
  • box wine is however that it is not so easy to see how much is left in the carton and therefore it is less easy to keep a check on what has been consumed.
  • FR-Al 2653877 describes a device consisting of an opaque container having a second, inner container.
  • the purpose of the device is to be able to determine how much liquid the inner container contains.
  • the inner container rests against an elastic pocket containing a measuring fluid which is in communication with a tube on the outside of the outer container.
  • a measuring fluid which is in communication with a tube on the outside of the outer container.
  • Embodiments are also described where spring systems in the bottom of the outer container are actuated by the weight of the contents of the inner container, and this is indicated by means of various connections that provide a reading which can be read off through a window in the outer container.
  • the systems described in this document are relatively complex and are not suitable for use in, for example, a wine box where the solution used should be extremely simple and inexpensive to produce.
  • JP A 59042418 describes a volume measuring device that is based on the use of a strain gauge.
  • the use of an electronic circuit allows the volume of liquid to be known by means of audible signals.
  • the device requires re-setting for each volume measurement and therefore is not suitable for the purpose of the present invention.
  • the object of the present inventions is to teach a method for measuring the level and the temperature in containers containing liquid or liquid-like substances where known methods for level measurement and temperature measurement cannot be used directly, or where such methods would be too costly for the purpose.
  • the basis for the methods is the detection of the change in permittivity in a capacitor that is arranged in the carton, the change in permittivity being due to a change in the amount of wine in the bag inside the carton.
  • the change in permittivity will thus be proportional to the remaining wine in the bag.
  • the present invention provides a method for detecting the liquid level in an inner container, preferably a bag, disposed within an outer container, characterised in that the contents in the inner container are detected by changes in permittivity in a capacitor located on the wall of the outer container, the changes in permittivity being caused by the change in the liquid contents in the inner container.
  • the present invention further provides an outer container intended as packaging that is to contain an inner container, preferably a bag, which is characterised in that metallised areas are formed on the interior surface of the container, and that the container, in a window formed in one of its side faces, comprises a display for displaying measured values.
  • a capacitor is obtained by providing metallised faces on parts of the interior surface of the outer container.
  • the capacitor faces can be arranged in any way in the outer container provided that no short circuit occurs.
  • the metallised faces can be obtained by the application of metal foil or by brush application.
  • the required electrical energy for establishing a field between the capacitor plates may be provided either by means of solar cells or by means of a battery. It is preferable to use a battery that is activated by the user when he starts using the wine box.
  • This activation may easily be carried out in that a tab or the like is arranged on the carton which the user pulls off when the carton is to be taken into use, or by other techniques as described in more detail below.
  • capacitor plates there may in general be air, a vacuum or an insulating material, and in special cases also liquids or gases.
  • the medium between the capacitor plates is, in the illustrated case involving a wine box, varying amounts of liquid.
  • Permittivity as a value describes how an electric field affects and is affected by a dielectric medium, and is determined by the ability of the material to polarise in response to the field, and thereby reduce the electric field inside the material.
  • permittivity relates to a material's ability to transmit an electric field.
  • permittivity is not a constant; it varies as the conditions between the capacitor plates change, and can thus be used as a measurable value in connection with the present invention.
  • the temperature sensor used in connection with the present invention is a standard temperature sensor that is known in the art.
  • the problem associated with measuring the liquid contents in a BEB is that there is limited space in the container. Furthermore, the bag of liquid must not be damaged and moreover the carton must be mass-producible using existing packaging machines without the automatic machines having to undergo extensive alterations. As the bottling plants receive the cartons flat, the sensor must be a part of the carton and be equally flat.
  • Figure 1 shows the inside of a carton for use as an outer container, in an unfolded state, as it is when delivered to the bottling plants.
  • Figure 2 shows the outside of the outer container in an unfolded state, with a display inserted.
  • Figure 3 shows a section through the side of the outer container which contains said display.
  • Figure 4 shows a part of the inner surface of the outer container where the individual parts can be seen.
  • Figure 5 shows the inside of the unfolded outer container with the individual parts mounted.
  • Figure 6 is a drawing indicating the course of the field lines between the capacitor faces.
  • Fig. 1 shows the inside of a carton that is unfolded as it is when delivered to the bottling plants.
  • A) indicates the actual carton as punched out so that it can be folded to form a box.
  • B) indicates an area of the carton which is metallised either with an electrically conductive paint and/or with a metal or graphite coating, and which constitutes one of the capacitor faces.
  • C) indicates the back of the electronic circuit which is inserted into a hole punched out in the carton. In this way, an electronic temperature sensor is provided that detects the temperature in the carton.
  • D) indicates an extension of the sensor which together with C) is metallised on the surface and thus constitutes the other of the capacitor plates.
  • An insulating material H shown in Fig.
  • Fig. 2 shows the outside of the carton unfolded with surface F) on which all printing is arranged.
  • G) indicates the front of the electronic instrument where temperature and the level are shown on an LSD display.
  • a battery which is activated by dispensing wine, is arranged on the front of the instrument. Activation can take place either by pulling the drawing tap that is inside the box out through the hole E) in Fig. 1, or it can be activated by removing a plastic strip that rests against the battery poles. Perforations are arranged around the punched-out hole for the electronic instrument so that after use, it is easy to pull the instrument out and dispose of it as electronic waste.
  • the electronic instrument contains the electronics that convert the change in permittivity into a readable figure on the display which can show remaining contents in the box in either remaining glasses, litres or any other volume or weight figure. This figure can alternate between showing the amount of liquid in the box and the temperature therein, or there may be two rows of figures showing the same simultaneously.
  • Fig. 3 shows a section through the carton and the instrument, the individual references being the same as mentioned above.
  • Fig. 4 is a drawing of the box when folded where the individual components can be seen inside.
  • Fig. 5 shows the carton from the inside as in Fig. 1, but where the metallised face B) has been replaced by a metallised film or paint I).

Abstract

A method for measuring the liquid contents in a 'bag in box' such as in wine boxes by detecting the change in permittivity in a capacitor that is arranged internally in the wine box and where the permittivity between the capacitor plates is determined by the wine contents in the bag. The method further comprises a temperature gauge that is an integral part of the display instrument on the box.

Description

METHOD FOR DETECTING THE LIQUID LEVEL IN AN INNER CONTAINER
The present invention relates to method for measuring the contents of a liquid in special containers such as wine boxes and similar containers for liquids. The invention further relates to containers suitable for carrying out such a method.
Today there exists a wide variety of cardboard containers having an inner bag of plastic or similar material containing some form of liquid. One instance of this is wine in BIBs (Bag in Box) of various sizes. A BIB consists of a paperboard or like carton with a bag of plastic or the like arranged therein which contains the actual wine. A typical size for a BIB is 3 litres.
BIBs have become very popular, partly because the wine keeps well even after it has started to be dispensed. This is because the bag inside the carton which contains the wine collapses as the wine is dispensed without allowing any air to enter, which is what happens when wine is poured from a bottle. If the wine comes into contact with air for a longish period of time, the air spoils the wine as the wine becomes oxidised.
One disadvantage of "box wine" is however that it is not so easy to see how much is left in the carton and therefore it is less easy to keep a check on what has been consumed. In addition, it is not possible to measure the temperature of the wine in a conventional manner, which is extremely desirable in order to be able to serve the wine at the correct temperature.
FR-Al 2653877 describes a device consisting of an opaque container having a second, inner container. The purpose of the device is to be able to determine how much liquid the inner container contains. The inner container rests against an elastic pocket containing a measuring fluid which is in communication with a tube on the outside of the outer container. When the mass of the container containing the liquid that is to be measured changes with a change in volume, this will exert a greater or lesser pressure on the elastic pocket and this is read as a level change in the tube that is visible on the outside of the outer container. Embodiments are also described where spring systems in the bottom of the outer container are actuated by the weight of the contents of the inner container, and this is indicated by means of various connections that provide a reading which can be read off through a window in the outer container. The systems described in this document are relatively complex and are not suitable for use in, for example, a wine box where the solution used should be extremely simple and inexpensive to produce.
JP A 59042418 describes a volume measuring device that is based on the use of a strain gauge. The use of an electronic circuit allows the volume of liquid to be known by means of audible signals. The device requires re-setting for each volume measurement and therefore is not suitable for the purpose of the present invention.
The object of the present inventions is to teach a method for measuring the level and the temperature in containers containing liquid or liquid-like substances where known methods for level measurement and temperature measurement cannot be used directly, or where such methods would be too costly for the purpose.
In what follows, the methods will be described for a standard 3-litre BIB, but the methods can be applied to many other liquid containers and are thus not limited to only being applicable to cartons for wine.
The basis for the methods is the detection of the change in permittivity in a capacitor that is arranged in the carton, the change in permittivity being due to a change in the amount of wine in the bag inside the carton. The change in permittivity will thus be proportional to the remaining wine in the bag.
Accordingly, the present invention provides a method for detecting the liquid level in an inner container, preferably a bag, disposed within an outer container, characterised in that the contents in the inner container are detected by changes in permittivity in a capacitor located on the wall of the outer container, the changes in permittivity being caused by the change in the liquid contents in the inner container.
The present invention further provides an outer container intended as packaging that is to contain an inner container, preferably a bag, which is characterised in that metallised areas are formed on the interior surface of the container, and that the container, in a window formed in one of its side faces, comprises a display for displaying measured values.
A capacitor is obtained by providing metallised faces on parts of the interior surface of the outer container. The capacitor faces can be arranged in any way in the outer container provided that no short circuit occurs. The metallised faces can be obtained by the application of metal foil or by brush application.
The required electrical energy for establishing a field between the capacitor plates may be provided either by means of solar cells or by means of a battery. It is preferable to use a battery that is activated by the user when he starts using the wine box.
This activation may easily be carried out in that a tab or the like is arranged on the carton which the user pulls off when the carton is to be taken into use, or by other techniques as described in more detail below.
Between capacitor plates there may in general be air, a vacuum or an insulating material, and in special cases also liquids or gases. The medium between the capacitor plates is, in the illustrated case involving a wine box, varying amounts of liquid.
Permittivity as a value describes how an electric field affects and is affected by a dielectric medium, and is determined by the ability of the material to polarise in response to the field, and thereby reduce the electric field inside the material. Thus, permittivity relates to a material's ability to transmit an electric field. In general, permittivity is not a constant; it varies as the conditions between the capacitor plates change, and can thus be used as a measurable value in connection with the present invention.
The temperature sensor used in connection with the present invention is a standard temperature sensor that is known in the art.
The problem associated with measuring the liquid contents in a BEB is that there is limited space in the container. Furthermore, the bag of liquid must not be damaged and moreover the carton must be mass-producible using existing packaging machines without the automatic machines having to undergo extensive alterations. As the bottling plants receive the cartons flat, the sensor must be a part of the carton and be equally flat.
The present invention will be described in more detail below with reference to the attached drawings, wherein:
Figure 1 shows the inside of a carton for use as an outer container, in an unfolded state, as it is when delivered to the bottling plants. Figure 2 shows the outside of the outer container in an unfolded state, with a display inserted.
Figure 3 shows a section through the side of the outer container which contains said display.
Figure 4 shows a part of the inner surface of the outer container where the individual parts can be seen.
Figure 5 shows the inside of the unfolded outer container with the individual parts mounted.
Figure 6 is a drawing indicating the course of the field lines between the capacitor faces.
Referring to Fig. 1, it shows the inside of a carton that is unfolded as it is when delivered to the bottling plants. A) indicates the actual carton as punched out so that it can be folded to form a box. B) indicates an area of the carton which is metallised either with an electrically conductive paint and/or with a metal or graphite coating, and which constitutes one of the capacitor faces. C) indicates the back of the electronic circuit which is inserted into a hole punched out in the carton. In this way, an electronic temperature sensor is provided that detects the temperature in the carton. D) indicates an extension of the sensor which together with C) is metallised on the surface and thus constitutes the other of the capacitor plates. An insulating material H), shown in Fig. 3, is disposed between C) and D) and the surface B) to prevent short-circuiting of the plates B) and C) and D). When the electronic circuit is inserted into its hole, one or more spring contact points to the metallised surface B) are arranged thereon, whereby soldered connections are thus avoided.
Fig. 2 shows the outside of the carton unfolded with surface F) on which all printing is arranged. G) indicates the front of the electronic instrument where temperature and the level are shown on an LSD display. A battery, which is activated by dispensing wine, is arranged on the front of the instrument. Activation can take place either by pulling the drawing tap that is inside the box out through the hole E) in Fig. 1, or it can be activated by removing a plastic strip that rests against the battery poles. Perforations are arranged around the punched-out hole for the electronic instrument so that after use, it is easy to pull the instrument out and dispose of it as electronic waste.
The electronic instrument contains the electronics that convert the change in permittivity into a readable figure on the display which can show remaining contents in the box in either remaining glasses, litres or any other volume or weight figure. This figure can alternate between showing the amount of liquid in the box and the temperature therein, or there may be two rows of figures showing the same simultaneously.
Fig. 3 shows a section through the carton and the instrument, the individual references being the same as mentioned above.
Fig. 4 is a drawing of the box when folded where the individual components can be seen inside.
Fig. 5 shows the carton from the inside as in Fig. 1, but where the metallised face B) has been replaced by a metallised film or paint I).

Claims

P a t e n t c l a i m s
1.
A method for detecting the liquid level in an inner container, preferably a bag, disposed within an outer container, as in wine boxes, characterised in that the contents in the inner container are detected by changes in permittivity in a capacitor located on the inner surface of the outer container, the changes in permittivity being caused by a change in the liquid contents in the inner container.
2.
A method for detecting liquid level according to claim 1, characterised in that one of the capacitor plates is formed by metallising a part of or the whole of the inside of the carton, and that the other capacitor plate is constituted by the metallised back of an instrument that is located in the outer container facing the inner container, or the liquid bag, and that between this and the inside surface there is provided an insulating layer between the faces.
3.
A method for detecting liquid level according to claims 1 and 2, characterised in that on the back of the instrument facing the inner container there is arranged a temperature sensor which detects the temperature in the box.
4.
A method for detecting liquid level according to claims 1, 2 and 3, characterised in that the instrument that is located in the outer container has a display that displays the detected liquid level and temperature in the inner container.
5.
A method according to any one of the preceding claims, characterised in that detection of the changes in permittivity is carried out by an electronic circuit.
6.
An outer container intended as packaging that is to contain an inner container, preferably a bag, characterised in that metallised areas are formed on the interior surface of the container to serve as capacitor faces, and that the container, in a window formed in one of the side faces, comprises a display for displaying measured values. An outer container according to claim 6, characterised in that one of the capacitor faces is formed by metallising a part of or the whole of the inside of the outer container and that the other capacitor face is constituted by the back of said display instrument, and that between this and the inside surface of the outer container there is provided an insulating layer between the faces.
8.
Ail outer container according to claims 6 - 7, characterised in that an electronic circuit is arranged on the back of the display for detecting measured values.
PCT/NO2008/000006 2007-01-08 2008-01-08 Method for detecting the liquid level in an inner container WO2008085060A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE0900938A SE534295C2 (en) 2007-01-08 2008-01-08 A method for detecting the liquid level in an inner container and container

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO20070125 2007-01-08
NO20070125 2007-01-08
NO20075220 2007-10-11
NO20075220A NO333309B1 (en) 2007-01-08 2007-10-11 A method of recording the liquid level in an inner container as well as a container comprising an outer and an inner container, wherein the inner container contains liquid

Publications (1)

Publication Number Publication Date
WO2008085060A1 true WO2008085060A1 (en) 2008-07-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011077187A1 (en) 2009-12-22 2011-06-30 Cefriel - Societa' Consortile A Responsabilita' Limitata Measuring device, container means and system for monitoring and managing container means
CN113942972A (en) * 2021-11-05 2022-01-18 广东富信科技股份有限公司 Taking-out device for flexible bagged beverage
NL2026496B1 (en) * 2020-09-17 2022-05-23 Duotank Stainless Welding B V Installation for holding liquid foodstuffs and determining the liquid quantity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5635962A (en) * 1995-07-24 1997-06-03 Hewlett-Packard Company Capacitive ink level detection sensor
US5826752A (en) * 1995-05-23 1998-10-27 Latimer; Scott Fluid despensing and shipping container system and methods
US6075464A (en) * 1991-04-25 2000-06-13 Hydro Quebec Dynamic and non-contact measurement of displacement or of permittivity by use of a capacitive sensor
US6474156B1 (en) * 1988-10-19 2002-11-05 Tohoku Ricoh Co., Ltd. Method and device for determining the amount of a liquid existing in a container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6474156B1 (en) * 1988-10-19 2002-11-05 Tohoku Ricoh Co., Ltd. Method and device for determining the amount of a liquid existing in a container
US6075464A (en) * 1991-04-25 2000-06-13 Hydro Quebec Dynamic and non-contact measurement of displacement or of permittivity by use of a capacitive sensor
US5826752A (en) * 1995-05-23 1998-10-27 Latimer; Scott Fluid despensing and shipping container system and methods
US5635962A (en) * 1995-07-24 1997-06-03 Hewlett-Packard Company Capacitive ink level detection sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011077187A1 (en) 2009-12-22 2011-06-30 Cefriel - Societa' Consortile A Responsabilita' Limitata Measuring device, container means and system for monitoring and managing container means
US8631697B2 (en) 2009-12-22 2014-01-21 Cefriel—Societa' Consortile a Responsabilita' Limitata Measuring device, container and system for monitoring and managing a container
NL2026496B1 (en) * 2020-09-17 2022-05-23 Duotank Stainless Welding B V Installation for holding liquid foodstuffs and determining the liquid quantity
CN113942972A (en) * 2021-11-05 2022-01-18 广东富信科技股份有限公司 Taking-out device for flexible bagged beverage

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