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WO2010123425A1 - Article et procédé de détection d'humidité - Google Patents

Article et procédé de détection d'humidité Download PDF

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Publication number
WO2010123425A1
WO2010123425A1 PCT/SE2009/050427 SE2009050427W WO2010123425A1 WO 2010123425 A1 WO2010123425 A1 WO 2010123425A1 SE 2009050427 W SE2009050427 W SE 2009050427W WO 2010123425 A1 WO2010123425 A1 WO 2010123425A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
absorbent article
absorbent
fluid
absorbent material
Prior art date
Application number
PCT/SE2009/050427
Other languages
English (en)
Inventor
Mats Birring
Original Assignee
Sca Hygiene Products Ab
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 Sca Hygiene Products Ab filed Critical Sca Hygiene Products Ab
Priority to PCT/SE2009/050427 priority Critical patent/WO2010123425A1/fr
Publication of WO2010123425A1 publication Critical patent/WO2010123425A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity

Definitions

  • the present invention concerns an absorbent article comprising absorbent material that is arranged to absorb wetness, such as a diaper, an incontinence guard, a sanitary napkin, a wound or sore dressing, a bed protector or a similar product.
  • the present invention also concerns a method for determining the amount of fluid absorbed by an absorbent material of an absorbent article.
  • an absorbent article such as a diaper or incontinence guard becomes saturated, it requires changing. This process is often performed by a person other than the wearer of the absorbent article, such as a guardian or nursing personnel. Failure to change a diaper when necessary can result in diaper rash and discomfort for the wearer.
  • Some commercially available absorbent articles comprise a sensor, such as a wetness sensor, for the detection of a soiling event, such as urination or defecation. When such a sensor detects a soiling event, a signal is generated to alert a user or caregiver that the absorbent article should be changed. If the diaper is changed before it becomes too saturated, leakage may be prevented.
  • European patent no. EP 1 057 150 discloses a method for detecting a fluid which utilizes a resonant circuit comprising a resistor having two conductors that are arranged a distance apart in absorbent material that is arranged to absorb fluid. Once a certain amount of fluid is absorbed in the space between the two conductors, the electrical resistance between the conductors will decrease, an electrical current will flow between the conductors and the resonant circuit will then be able to resonate and receive electromagnetic energy from an oscillator.
  • the two conductors of this embodiment therefore function as the electrical contacts of a variable resistor, the absorbent material between them constituting the resistor.
  • US patent no. US 5, 469,145 discloses a wet diaper detector to detect the occurrence of a wet condition in a diaper.
  • the wet diaper detector comprises an elongated strip of material sized to be positioned in a diaper with a portion of the strip residing in a region of the diaper subject to wetness and an end of the strip protruding from the diaper at the upper rear or front portion thereof.
  • the strip carries a pair of spaced conductors that extend along the length of the strip and terminate at the protruding end thereof.
  • a detector and alarm assembly is adapted to be releasably coupled to the protruding end of the elongated strip and is configured to monitor the electrical resistance between the spaced conductors of the strip.
  • US patent no. US 5, 469,145 also discloses a wet diaper detector embodiment in which a parallel plate capacitor together with an alarm circuit is placed in a button-shaped housing that is removably fixed to the exterior of a diaper.
  • a parallel plate capacitor together with an alarm circuit is placed in a button-shaped housing that is removably fixed to the exterior of a diaper.
  • the conductors are only weakly capacitively coupled.
  • the moisture within the diaper acts as an electrolyte that increases the capacitive coupling between the plates of the parallel plate capacitor.
  • This increased capacitive coupling is sensed by the alarm circuit and an audible alarm is triggered.
  • a disadvantage with such a system is that an audible alarm may be triggered unnecessarily or prematurely if the diaper becomes wet only in the region in the vicinity if the button- shaped housing.
  • An object of the invention is to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
  • a further object of the present invention is to provide a wetness gauge that may be used to determine the amount of fluid absorbed in the absorbent material of an absorbent article, i.e. not merely a wetness sensor/detector to detect whether fluid has been absorbed in some part of the absorbent material.
  • an absorbent article comprising absorbent material that is arranged to absorb fluid
  • a wetness gauge that comprises a capacitor having a first conductor and a second conductor which are arranged to extend over a substantial length of the absorbent material, whereby the first conductor is capacitively coupled to the second conductor.
  • At least one of the first conductor and the second conductor is arranged so as to be fluid-proofed from the absorbent material, so that at most one conductor resides in a region, i.e. volume or area, that may be subjected to wetness during the use of the absorbent article.
  • the wetness gauge is arranged to determine the amount of fluid absorbed along the substantial length of the absorbent material by monitoring the capacitance between the first and second conductors continuously or intermittently.
  • the amount of fluid being absorbed by the absorbent material may be determined because the capacitance of the capacitor will change depending on the amount of fluid in the absorbent material in the whole area/volume between the first and the second conductor. Contrary to conventional wetness sensors/detectors that detect only whether fluid has been absorbed in some part of the absorbent material, the absorbent article according to the present invention may be used to determine the amount of fluid absorbed along a substantial length of the absorbent material.
  • the wetness gauge of the absorbent article of the present invention may be used to indicate how much fluid a diaper contains, a caregiver will not need to disturb a wearer of the diaper unnecessarily to check how much fluid a diaper contains, as is the case with conventional sensors that merely detect a soiling event without providing an indication as to the severity of the soiling event. A wearer of the diaper will therefore be left undisturbed, to rest or sleep for example. Caregivers will receive a much better indication of whether an absorbent article needs to be changed and the number of absorbent articles being changed unnecessarily should consequently decrease. Furthermore, absorbent articles containing only a small amount of fluid will not be discarded unnecessarily, which will result in cost savings.
  • fluid as used throughout this document is intended to include any liquid or liquid-containing matter, such as body fluids, i.e. any liquid or liquid-containing matter excreted or secreted from a human or animal body, such as urine, faeces or blood.
  • length as used throughout this document is not intended to refer only to the long dimension of absorbent material as measured between its ends, but refers to any distance measured in any direction over the absorbent material.
  • the "substantial length" over which the first and/or second conductor extends does not (necessarily) refer to the length of the first and/or second conductor but to the total length of absorbent material across which the first conductor and/or the second conductor extend(s).
  • a capacitor having conductors whose length corresponds to a substantial part of the maximum length of the absorbent material on/in 10 which they are provided, but which conductors extend over just a small region of the absorbent material, such as spiral-formed or interdigitated conductors each comprising a plurality of fingers, should not be considered to fall within the scope of the claims of the present invention.
  • At least one of the first conductor and the second conductor may be removably or non- removably provided on a surface of fluid-impermeable material, such as a backsheet of the absorbent article, which is arranged to be placed adjacent to the absorbent material, namely a surface that will not come into contact with wet absorbent material when the absorbent article is in use.
  • a surface of fluid-impermeable material such as a backsheet of the absorbent article
  • the absorbent article 20 may be embedded in the backsheet itself, for example between layers of material that form at least a part of a backsheet, when the absorbent article is in use.
  • At least one of the first conductor and the second conductor may be embedded in the absorbent material.
  • At least one of the first conductor and the second conductor or the whole wetness gauge may be enclosed in fluid-impermeable material.
  • the fluid-impermeable material may be a pocket of fluid-impermeable fabric in which at least one of the first conductor and the second conductor or the whole wetness gauge is placed, or a fluid-impermeable coating
  • the substantial length preferably corresponds to at least 30% of the maximum length of the absorbent material, more preferably at least 40% and most preferably at least 50%,
  • absorbent material is intended to mean the part or parts of an absorbent article designated to absorb fluid.
  • the expression may also include absorbent, semi-absorbent or non-absorbent material located adjacent to designated absorbent material in which fluid may be absorbed or along which fluid may be led towards designated absorbent material.
  • the capacitor may constitute part of an LCR circuit or RF tag.
  • An inductor (L), (optionally) a resistor (R) and a capacitor (C) comprising a first and a second conductor, such as two parallel strips, extending in the longitudinal direction of the absorbent article, may for example be provided on/in the absorbent article.
  • the LCR circuit or RF tag When the capacitance has reached a certain value, corresponding to a certain length of wetted surface/volume, the LCR circuit or RF tag will resonate and either absorb energy from an excitation signal at its resonant frequency if operating in energy absorption mode, or it will start to oscillate at its resonant frequency in response to receiving an excitation signal if operating in energy radiation mode.
  • an absorbent article according to the present invention need not necessarily comprise or be used with an LCR circuit or an RF tag but may comprise, or be used with any means of monitoring the capacitance between the first conductor and the second conductor, i.e. any means of measuring the capacitance or detecting changes in the capacitance, such as a digital multi-meter.
  • An absorbent article may comprise a chassis extending about a longitudinal axis (L), the chassis including a fluid-impermeable backsheet, a fluid- permeable topsheet and absorbent material disposed between the backsheet and the topsheet.
  • the absorbent article may for example be a diaper, incontinence guard, a sanitary napkin, a wound or sore dressing, a bed protector or a similar product.
  • An absorbent article according to the present invention may however comprise only absorbent material and a wetness gauge or only absorbent material, a layer of fluid- impermeable material, such as a backsheet, and a wetness gauge. Att least one of the first conductor and the second conductor may be arranged to extend over substantial length of the absorbent material in a direction substantially parallel or collinear to the longitudinal axis (L) of the absorbent article.
  • first and/or second conductor(s) of the capacitor of the wetness gauge need not necessarily form an integral part of the absorbent article.
  • the first or second conductor may for example be in the form of an elongated conducting strip that is provided in, or attached to the absorbent article.
  • the wetness gauge may be arranged to be removably attached to an absorbent article, such as by inserting it into a designated pocket in the absorbent article or by adhering or mechanically attaching it thereto. The entire wetness gauge may thereby be re-used.
  • the absorbent article may comprise a backsheet and an LCR circuit or RF tag is removably or non-removably arranged on an outermost surface of the backsheet when the absorbent article is in use.
  • At least part of the LCR circuit may be printed on the outermost surface of a backsheet and/or at least part of the LCR circuit may be detachably mounted on the outermost surface of the backsheet.
  • the first and the second conductor may be printed on the backsheet and the remaining parts of the LCR circuit may be contained in a housing that is removably or non-removably attached to the backsheet, by means of adhesion, welding or by mechanical means for example.
  • a disposable absorbent article may be manufactured with the first conductor and the second conductor of the capacitor of the wetness gauge provided on its backsheet and a re-usable housing may be removably attached to the backsheet when the absorbent article is in use, whereby a complete LCR circuit is formed when the housing has been attached to the backsheet
  • the wetness gauge may comprise a plurality of the capacitors, which may be used to monitor different parts of a piece of absorbent material or a plurality of pieces of absorbent material.
  • the absorbent article may comprise integrated or remote alarm means to indicate, to a user of the absorbent article, a guardian or nursing personnel for example, that a predetermined amount of fluid has been absorbed by the absorbent material, by means of an optic, acoustic and/or tangible alarm.
  • alarm means may alternatively or additionally be used to provide a continuous or periodic indication of the amount of fluid that has been absorbed by the absorbent material. Such an indication may also be provided on demand, when requested by a caregiver for example.
  • the present invention also concerns a method for determining the amount of wetness absorbed by absorbent material of an absorbent article.
  • the method comprises the steps of: providing the absorbent article with a wetness gauge that comprises a capacitor having a first conductor and a second conductor which are arranged to extend over a substantial length of the absorbent material, whereby the first conductor is capacitively coupled to the second conductor. At least one of the first conductor and the second conductor is arranged to be fluid-proofed from the absorbent material. The amount of fluid absorbed along the substantial length of the absorbent material is monitored by monitoring the capacitance between the first and second conductors.
  • Figure 1 shows a plan view of an absorbent article according to an embodiment of the invention respectively
  • Figure 2 shows an LCR circuit that may be printed on an absorbent article according to an embodiment of the invention
  • Figure 3 shows an absorbent article according to an embodiment of the present invention when in use
  • Figure 4 shows a cross section of an absorbent article according to an embodiment of the invention
  • Figure 5 is a flow chart showing the steps of a method according to an embodiment of the invention.
  • reference number 10 generally denotes an absorbent article according to the present invention.
  • the absorbent article 10 comprises absorbent material 12 covered by a layer of fluid-impermeable material 14.
  • the absorbent article 10 comprises a wetness gauge including a parallel plate capacitor 16 having a first conductor 18 and a second conductor 20 which are provided on the surface of the layer of fluid-impermeable material 14 facing away from the absorbent material 12, whereby the first conductor 18 and the second conductor 20 will not become wet from fluid in the absorbent material 12 when the absorbent article 10 is in use.
  • the first conductor 18 and the second conductor 20 are arranged to extend over a substantial length of the absorbent material 12, namely about 80% of the maximum length of the absorbent material 12 in a direction substantially parallel to the longitudinal axis L of the absorbent article 10 in the illustrated embodiment.
  • the wetness gauge is arranged to determine the amount of fluid absorbed along the substantial length X of the absorbent material 12 by monitoring the capacitance between the first conductor 18 and the second conductor 20.
  • FIG. 2 schematically shows an LCR circuit 15, which may for example be printed on the outermost surface of a backsheet 32 of an absorbent article 10.
  • the LCR circuit 15 includes a capacitor 16 having a first conductor 18 and a second conductor 20 and an inductor 17. There will naturally be a certain amount of resistance from the circuit; alternatively, resistors may be included in parallel or in series with the capacitor 16 and the inductor 17.
  • the LCR circuit 15 may be an active circuit, which comprises a power source as a component of the circuit, or a passive circuit (as shown in figure 2), which does not comprise a power source as one of its components, but acts in response to an externally-applied power source.
  • first conductor 18 and the second conductor 20 need not necessarily extend in a straight line over the absorbent material 12.
  • the flat plates may be arranged at any angle with respect to the surface of the absorbent material 12, for example with the plane of their widest sides parallel or perpendicular to the surface of the absorbent material 12.
  • the first conductor 18 and/or the second conductor 18 and any or all of the components of an LCR circuit 15 may comprise electrically active materials that are printed on the absorbent article 10. i.e. materials that can conduct electrical charge.
  • electrically active materials are conducting polymers, such as polyphenylene- vinylene (PPV), polyaniline (PANI) and polypyrrole (PPy), and particle suspensions, i.e. small particles of an electrically-conducting material (e.g. a metal such as silver or copper, or a non-metal such as graphite) which are suspended in an organic solvent or carrier.
  • PV polyphenylene- vinylene
  • PANI polyaniline
  • PPy polypyrrole
  • particle suspensions i.e. small particles of an electrically-conducting material (e.g. a metal such as silver or copper, or a non-metal such as graphite) which are suspended in an organic solvent or carrier.
  • electrically active materials have mechanical properties which make them tolerant to
  • Printing can be carried out using standard techniques known in the art, such as laser printing, inkjet printing, thermal printing, screen printing, offset printing, relief print and rotogravure.
  • An absorbent article comprising a printed circuit does not significantly increase the size or stiffness of the absorbent article, is readily disposable and manufacturable using rapid assembly-line manufacturing methods.
  • At least a part of the LCR circuit 15, for example all of its components apart from the capacitor 16 or the entire LCR circuit 15 may be arranged to be detachably mounted on an absorbent article 10.
  • the capacitance C of a capacitor 16 may be expressed mathematically as:
  • ⁇ 0 is the permeability of free space (4 ⁇ * 1 CT 7 Henries per metre)
  • ⁇ r is the relative permeability of the core (dimensionless)
  • N is the number of turns in the inductor
  • A is the cross sectional area of the inductor in square metres and / is the length in metres.
  • the resonance frequency f 0 of a tuned circuit can be calculated from the values of L and C using:
  • a tuned circuit such as the LCR circuit 15 illustrated in Figure 2 resonates at a natural resonant frequency, which can be adjusted through choice of capacitor and inductor variables listed above.
  • a change in the fluid-content of the absorbent material 12 influences the resonant frequency f 0 of the electrical circuit. There are a number of ways in which this may be achieved.
  • the fluid-content of the absorbent material 12 may influence the capacitance of the capacitor 16.
  • Fluid-absorbent material may be present in the absorbent material 12
  • the absorption of fluid into the fluid- absorbent material has the effect of increasing the relative permittivity ( ⁇ r ) of the fluid- absorbent material (as water has a high relative permittivity), thus increasing the capacitance of the capacitor 16.
  • Figure 3 shows an absorbent article 10 when it is in use and being worn by a wearer 22.
  • the first conductor 18 and second conductor 20 are printed on the outside of the absorbent article 10.
  • the first conductor 18 and the second conductor 20 are arranged to extend over substantial length of the absorbent material 10, such as from the middle of the front panel 24 to the middle of the back panel 26. It should be noted that the first
  • the absorbent article 10 comprises an LCR circuit 15 or an RF tag (not shown in figure 3) that is arranged to trigger a remote alarm when the amount of fluid absorbed by absorbent material of an absorbent article 10 over the entire length over which the first conductor 18 and the second conductor 20 extend, exceeds a predetermined threshold.
  • the absorbent article 10 is used in combination with an RF transmitter/receiver (transponder) unit 28.
  • the transponder unit 28 comprises an inductor coil which generates an RF field and an antenna which detects an RF signal generated by the wetness gauge.
  • the transponder unit 28 also comprises indicating means, such as a loudspeaker which generates an audible signal or an LED which lights up when an absorbent article 10 needs to be changed, to indicate to a caregiver that the absorbent article needs to be changed.
  • indicating means such as a loudspeaker which generates an audible signal or an LED which lights up when an absorbent article 10 needs to be changed, to indicate to a caregiver that the absorbent article needs to be changed.
  • the transponder unit 28 is preferably a portable hand-held device.
  • the transponder unit 28 generates an RF field which corresponds to the resonant frequency LCR circuit 15 of the absorbent article 12.
  • the LCR circuit 15 resonates, and the RF signal thus produced can be detected by the transponder unit 28.
  • the transponder unit 28, or the absorbent article 10 comprises a data storage unit in which data, such as concerning the capacitance of the wetness gauge over a period of time, can be stored. This information can be downloaded to a computer and then analysed by caregivers.
  • An absorbent article according to the present invention may comprise a plurality of wetness gauges in different regions of an absorbent article 10. In this way, the nature, extent and location of the wetness in the absorbent article 10 can be monitored.
  • An absorbent article 10 according to the present invention may alternatively or additionally be arranged to trigger an alarm located in the absorbent article 10 itself to alert a person in the vicinity of the absorbent article and/or the wearer thereof when the amount of fluid absorbed by absorbent article 10 exceeds a predetermined threshold.
  • FIG 4 shows a cross section of an absorbent article 10 according to an embodiment of the invention.
  • the absorbent article 10 comprises a fluid-permeable topsheet 30, a fluid- impermeable backsheet 32 and absorbent material 12 disposed between the topsheet 30 and the backsheet 32.
  • a fluid-proofed wetness gauge 34 is embedded in the absorbent material 12. By fluid-proofing the wetness gauge 34 (or at least one of its capacitor's conductors 18, 20) there is no risk of a short circuit rendering the wetness gauge useless.
  • the fluid-permeable topsheet 30 optionally consists of a nonwoven material, e.g., a spunbond material of continuous filaments, a meltblown material, a bonded carded fibrous web or a perforated plastic film.
  • topsheet 30 can be different in different regions of the absorbent article 10.
  • the fluid-impermeable backsheet 32 may consist of a plastic film, a nonwoven material treated with a fluid impervious material or a hydrophobic nonwoven material which resists fluid penetration.
  • Other types of fluid-barrier-materials may of course also be used as the fluid-impermeable backsheet 32, such as e.g. closed-cell plastic foams, various fluid- barrier laminates etc. It is preferable that the fluid-impermeable backsheet 32 is permeable to air and vapour.
  • the topsheet 30 and the backsheet 32 may have a somewhat greater extension in the plane than the absorbent material 12 and may extend outside the edges thereof.
  • the topsheet 30 and the backsheet 32 may be connected to each other within the projecting regions thereof, e.g., by gluing or welding by heat or ultrasound.
  • the absorbent material 12 can be of any conventional kind. Examples of commonly- occurring absorbent materials are cellulosic fluff pulp, tissue layers, highly absorbent polymers (so-called "super-absorbents"), absorbent foam materials, absorbent non- wovens and the like. It is common to have absorbent material comprising layers of different material with different properties with respect to fluid acquisition capacity, fluid distribution capacity and storage capacity.
  • the thin absorbent material which is common in incontinence guards often comprises a compressed mixed or layered structure of cellulosic fluff pulp and super-absorbent.
  • Figure 5 is a flow diagram showing the steps of a method according to an embodiment of the invention.
  • the method comprises the steps of providing an absorbent article with a wetness gauge that comprises a capacitor 16 having a first conductor and a second conductor which are arranged to extend over a substantial length of the absorbent material, whereby the first conductor is capacitively coupled to the second conductor. At least one of the first conductor and the second conductor are arranged to be fluid-proofed from the absorbent material. The capacitance between the first and second conductors is then monitored to determine the amount of fluid absorbed along the substantial length of the absorbent material.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pathology (AREA)
  • Epidemiology (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

L'invention porte sur un article absorbant (10) qui comporte un matériau absorbant (12) qui est agencé pour absorber un fluide. L'article absorbant comporte une jauge d'humidité qui comporte un condensateur (16) ayant un premier conducteur (18) et un second conducteur (20) qui sont agencés pour s'étendre sur une longueur importante (X) dudit matériau absorbant (12), le premier conducteur (18) étant couplé de façon capacitive audit second conducteur (20). Le premier conducteur (18) et/ou le second conducteur (20) est disposé de façon à être étanche aux fluides absorbés par ledit matériau absorbant (12), ladite jauge d'humidité étant agencée pour déterminer la quantité de fluide absorbée le long de ladite longueur importante (X) dudit matériau absorbant (12) par la surveillance de la capacité entre ledit premier conducteur (18) et le second conducteur (20).
PCT/SE2009/050427 2009-04-23 2009-04-23 Article et procédé de détection d'humidité WO2010123425A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/SE2009/050427 WO2010123425A1 (fr) 2009-04-23 2009-04-23 Article et procédé de détection d'humidité

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Application Number Priority Date Filing Date Title
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Cited By (22)

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EP2519207A2 (fr) * 2009-12-29 2012-11-07 Kimberly-Clark Worldwide, Inc. Système de détection sans conducteur pour élément absorbant
WO2013016765A1 (fr) * 2011-08-01 2013-02-07 Fred Bergman Healthcare Pty Ltd Capteur d'humidité capacitif et procédé de fabrication associé
WO2013076593A1 (fr) * 2011-11-22 2013-05-30 Kimberly-Clark Worldwide, Inc. Détection passive sans contact pour articles absorbants
WO2013109892A1 (fr) * 2012-01-18 2013-07-25 Rest Devices, Inc. Système et procédé de mesure de mouvement d'une partie du corps
NL2010569C2 (en) * 2013-04-04 2014-10-07 Salusion Ip B V A moisture sensing module and a napkin.
US9322797B1 (en) 2014-04-30 2016-04-26 Helvetia Wireless Llc Systems and methods for detecting a liquid
US9366644B1 (en) 2014-04-30 2016-06-14 Helvetia Wireless Llc Systems and methods for detecting a liquid
US9506886B1 (en) 2014-04-30 2016-11-29 Helvetia Wireless Llc Systems and methods for detecting a liquid
WO2017059831A1 (fr) * 2015-10-09 2017-04-13 Centrum organické chemie s.r.o. Système sensoriel permettant la détection électronique de fluides corporels dans une couche
US9907707B2 (en) 2011-06-03 2018-03-06 The Procter & Gamble Company Sensor systems comprising auxiliary articles
CN107837143A (zh) * 2017-11-17 2018-03-27 上海埃立孚医疗科技有限公司 一种产妇出血监测装置
US10292112B2 (en) 2013-08-08 2019-05-14 The Procter & Gamble Company Sensor systems for absorbent articles comprising sensor gates
US10285872B2 (en) 2016-03-03 2019-05-14 The Procter & Gamble Company Absorbent article with sensor
US10350115B2 (en) 2015-02-27 2019-07-16 Kimberly-Clark Worldwide, Inc. Absorbent article leakage assessment system
US10426672B2 (en) 2016-08-26 2019-10-01 Vener8 Technologies Moisture detection and notification system
WO2020039351A1 (fr) * 2018-08-21 2020-02-27 Johnson & Johnson Consumer Inc. Dispositif d'hygiène individuelle pour la détection d'un liquide
WO2020125999A1 (fr) 2018-12-20 2020-06-25 Essity Hygiene And Health Aktiebolag Système comprenant un article d'hygiène absorbant portable et un dispositif de surveillance de l'hygiène
US11013640B2 (en) 2018-05-04 2021-05-25 The Procter & Gamble Company Sensor devices and systems for monitoring the basic needs of an infant
US11013641B2 (en) 2017-04-05 2021-05-25 Kimberly-Clark Worldwide, Inc. Garment for detecting absorbent article leakage and methods of detecting absorbent article leakage utilizing the same
US11051996B2 (en) 2018-08-27 2021-07-06 The Procter & Gamble Company Sensor devices and systems for monitoring the basic needs of an infant
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WO2020125999A1 (fr) 2018-12-20 2020-06-25 Essity Hygiene And Health Aktiebolag Système comprenant un article d'hygiène absorbant portable et un dispositif de surveillance de l'hygiène
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