WO2019085776A1 - 一种电子感湿吸收用品及其潮湿程度检测方法 - Google Patents

一种电子感湿吸收用品及其潮湿程度检测方法 Download PDF

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Publication number
WO2019085776A1
WO2019085776A1 PCT/CN2018/111156 CN2018111156W WO2019085776A1 WO 2019085776 A1 WO2019085776 A1 WO 2019085776A1 CN 2018111156 W CN2018111156 W CN 2018111156W WO 2019085776 A1 WO2019085776 A1 WO 2019085776A1
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Prior art keywords
flexible
flexible electrode
electrode
width
capacitance value
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PCT/CN2018/111156
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English (en)
French (fr)
Inventor
黄新凯
陈阵
徐菲
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深圳一代科技有限公司
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Publication of WO2019085776A1 publication Critical patent/WO2019085776A1/zh

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    • 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
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • 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
    • G01N27/225—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 by using hygroscopic materials
    • 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
    • A61F2013/15008—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use
    • A61F2013/15146—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use for urine collection
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15463—Absorbency
    • 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
    • A61F2013/424—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 having an electronic device
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F2013/8488—Accessories, not otherwise provided for, for absorbent pads including testing apparatus
    • A61F2013/8491—Accessories, not otherwise provided for, for absorbent pads including testing apparatus including test methods

Definitions

  • the invention relates to the field of absorbent articles, in particular to an electronic moisture absorption article and a method for detecting the degree of moisture.
  • Disposable absorbent articles include absorbent articles such as diapers, disposable diapers, and sanitary napkins.
  • the disposable absorbent articles all have the problem of requiring timely replacement. If the replacement is too frequent, it is not only troublesome but wasteful; but if it is too late, It is possible to cause liquid leakage because the absorption capacity of the absorbent article is limited. How to dynamically detect and display the user's excretion, including the number of excretions, the amount of excretion, and whether the absorption capacity of the absorbent article is close to saturation, has a considerable reference value for the rational use of absorbent articles.
  • the technical problem to be solved by the present invention is to provide an electronic moisture absorption product and a moisture level detecting method thereof, which can improve the sensitivity of detection, enhance the anti-interference ability, and prevent the wet hand or skin from touching the electrode to cause a short circuit and cause an error. Alarm and adaptive detection of moisture and saturation of absorbent articles.
  • an electronic moisture absorption article comprising:
  • a flexible waterproof film an absorbent layer and a water permeable braid layer laminated in this order from bottom to top, the absorbent layer for absorbing liquid entering from the water permeable braid layer;
  • At least one second flexible electrode disposed on the surface of the flexible waterproof film facing the absorbing layer and located between the flexible waterproof film and the absorbing layer;
  • the flexible waterproof film, the first flexible electrode, the second flexible electrode, and the liquid contained in the absorbing layer constitute a non-polar variable electrolytic capacitor, wherein the first flexible electrode and the second flexible An electrode serving as a dielectric of the non-polar variable electrolytic capacitor as a dielectric of the non-polar variable electrolytic capacitor, and a liquid in the absorption layer as a liquid of the non-polar variable electrolytic capacitor
  • the electrolyte is obtained by detecting the capacitance value of the non-polar variable electrolytic capacitor to determine the wet state of the electronic moisture absorption article.
  • the width of the first flexible electrode is equal to the width of the second flexible electrode, and the width of the overlapping region is between one fifth and one half of the width of the first flexible electrode or the second flexible electrode.
  • the width of the first flexible electrode is greater than the width of the second flexible electrode, and the orthographic projection of the second flexible electrode on the surface of the flexible waterproof film provided with the first flexible electrode is located at the first flexible Inside the electrode.
  • the width of the first flexible electrode is 2-5 times the width of the second flexible electrode.
  • the invention also provides a method for detecting the degree of moisture of an electronic moisture absorption article, comprising:
  • an electronic moisture absorbing article comprising: a flexible waterproof film laminated in order from bottom to top, an absorbing layer and a water permeable woven layer; disposed on the flexible waterproof film facing away from the absorbing layer At least one first flexible electrode on the surface; at least one second flexible electrode disposed on the surface of the flexible waterproof film facing the absorbing layer and located between the flexible waterproof film and the absorbing layer; An orthographic projection of the second flexible electrode on a surface of the flexible waterproof film provided with the first flexible electrode, partially overlapping the first flexible electrode forming portion;
  • the width of the first flexible electrode and the width of the second flexible electrode are equal, and the width of the overlapping region is between one-half and one-fifth of the width of the first flexible electrode or the second flexible electrode.
  • the width of the first flexible electrode is greater than the width of the second flexible electrode, and the orthographic projection of the second flexible electrode on the surface of the flexible waterproof film provided with the first flexible electrode is located at the first flexible Within the electrode, the width of the first flexible electrode is 2-5 times the width of the second flexible electrode.
  • the first capacitance value is doubled to five times as a maximum capacitance value, and the maximum capacitance value corresponds to a maximum humidity level.
  • the range of capacitance values between the initial capacitance value and the maximum capacitance value is divided into 100 equal parts, which respectively correspond to a humidity degree of 0-100%.
  • An advantageous effect of the embodiment of the present invention is that a first flexible electrode and a second flexible electrode are respectively disposed on both sides of the flexible waterproof film of the electronic moisture absorption article, and the first and second flexible electrodes are partially overlapped to generate a prediction.
  • Initial capacitance value and becomes the basis for judging the degree of wetness; the second flexible electrode can be directly in contact with the absorbent layer of the absorbent article; the flexible waterproof film, the first and second flexible electrodes, and the liquid contained in the absorbent layer
  • Forming a variable electrolytic capacitor with an electrolyte liquid electrode only by detecting the capacitance value of the variable electrolytic capacitor and its change, the wet state of the electronic moisture absorption article can be known; not only can the detection sensitivity be effectively improved, It can greatly enhance the anti-interference ability, and can prevent the wet hand or skin from touching the two electrodes at the same time, causing a short circuit and false alarm.
  • it can also adaptively detect the moisture and saturation of the absorbent product.
  • FIG. 1 is a schematic cross-sectional view showing an electronic moisture absorption article according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the capacitance and resistance effects between two electrodes of an electronic moisture absorption article according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of performing capacitance detection on an electronic moisture absorption article according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing the relationship between a wet area and a capacitance in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing the design of an adaptive moisture and saturation level monitoring function by overlapping first and second flexible electrodes in an electronic moisture absorption article according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing the design of an adaptive moisture and saturation level monitoring function in which the first and second flexible electrodes of the electronic moisture absorption article are completely overlapped according to an embodiment of the present invention.
  • Fig. 7 is a schematic view showing the degree of moisture of an electronic moisture absorption article according to an embodiment of the present invention.
  • FIG. 8 is a schematic view showing the capacitance and resistance effects of the first and second flexible electrodes of the electronic moisture absorption article after being wetted by the electrolyte liquid according to an embodiment of the present invention.
  • Fig. 9 is a view showing the capacitance and resistance effects between two electrodes of the conventional electronic moisture absorption article.
  • FIG. 1 is a cross-sectional structural diagram of an electronic moisture absorption article according to an embodiment of the present invention.
  • the electronic moisture absorption article 10 includes:
  • the at least one first flexible electrode 321 disposed on the surface of the flexible waterproof film 11 facing away from the absorbing layer 15;
  • the second flexible electrode 322 is disposed on the surface of the flexible waterproof film 11 facing the absorbing layer 15 and located between the flexible waterproof film 11 and the absorbing layer 15;
  • the flexible waterproof film 11, the first flexible electrode 321, the second flexible electrode 322, and the liquid 19 contained in the absorbing layer 15 constitute a non-polar variable electrolytic capacitor, wherein the first flexibility
  • the electrode 321 and the second flexible electrode 322 serve as two electrodes of the non-polar variable electrolytic capacitor
  • the flexible waterproof film 11 serves as a dielectric of the non-polar variable electrolytic capacitor
  • the liquid 19 in the absorption layer 15 functions as The liquid electrolyte of the non-polar variable electrolytic capacitor can be obtained by detecting the capacitance value of the non-polar variable electrolytic capacitor.
  • the first flexible electrode 321 and the second flexible electrode 322 are respectively disposed on different surfaces (lower surface and upper surface shown in FIG. 1) of the flexible waterproof film 11, and the second flexible electrode 322 is directly included
  • the electrolyte liquid 19 in the absorption layer 15 is in contact. Since the electrolyte has good conductivity, it can make the entire electrolyte liquid 19 in an equipotential state with respect to the second flexible electrode 322 (ignoring the internal resistance), so that the entire liquid surface covering the flexible waterproof film 11 is equivalent to one liquid.
  • the liquid electrode 323 of the embodiment of the present invention expands the coverage of the second flexible electrode 322, and when the liquid electrode 323 covers the surface of the flexible waterproof film 11 directly opposite the first flexible electrode 321 (ie, the upper surface)
  • the capacitance value of the electrolytic capacitor is proportional to the surface area of the flexible waterproof film 11 corresponding to the first flexible electrode 321 of the liquid electrode 323, that is, the liquid electrode 323 is opposite to the first flexible electrode 321 .
  • the outer surface of the absorbent article 10, that is, the side of the flexible waterproof film 11 facing away from the absorbent layer 15, may also be covered with a nonwoven fabric 13 which enhances the strength of the flexible waterproof film 11 and improves
  • the touch sensitivity of the electronic moisture absorption article 10 of the present embodiment can protect the first flexible electrode 321, so that the nonwoven fabric can also be referred to as a flexible protective layer.
  • an absorbing material 16 such as wood pulp or cotton pulp, and a polymer water absorbing resin (SAP) 17 and the like are usually included.
  • the electronic moisture absorption article 10 of the present embodiment may specifically be a disposable absorbent article such as a diaper, a diaper, a paper pad, a sanitary napkin, etc., and the first flexible electrode 321 and the second flexible electrode 322 are made of a carbon conductive ink in a flexible waterproof A wet moisture sensing line printed on the film 11 (the base film of the above electronic moisture absorption product).
  • this is a schematic diagram of the capacitance and resistance effects between the two electrodes of the embodiment of the present invention. It can be seen that the capacitance value between the first and second flexible electrodes 321, 322 is equal to the capacitance value Ca between the first flexible electrode 321 and the equivalent liquid electrode 323, and is independent of the size and position of the second flexible electrode 322. As long as it is in contact with the electrolyte liquid 19.
  • the wet hands and the skin cannot simultaneously contact the electrodes of the two different surfaces, which can effectively avoid the two mistakes. Leakage occurs between the electrodes to prevent alarms from occurring.
  • the flexible waterproof film 11 is waterproof and insulated, even if both sides thereof are wetted by the liquid, the two electrodes 321, 322 are still separated by the flexible waterproof film 11, and the leakage resistance Rd between the electrodes is always in a high impedance state. There is no impact on the work, so in the embodiment of the invention, Rd can be ignored.
  • FIG. 3 this is a schematic structural diagram of performing capacitance detection on the electronic moisture absorption article in the embodiment of the present invention.
  • a capacitance detecting device 20 is included in FIG. 3, and the capacitance detecting device 20 is connected to the first flexible electrode 321 and the second flexible electrode 322 of the electronic moisture absorption product 10 due to the foregoing.
  • the capacitance value of the non-polar variable electrolytic capacitor is related to the liquid content and distribution contained in the absorbing layer 15, so that the moisture level monitoring of the electronic moisture absorbing article 10 can be realized by monitoring the change in the capacitance value between the electrodes in real time.
  • the first flexible electrode 321 disposed in the outer layer of the flexible waterproof film 11 is indicated by a broken line; the second flexible electrode 322 disposed in the inner layer of the flexible film 11 is indicated by a solid line; and 19 is an electrolyte liquid contained in the absorption layer 15 ( For example, urine).
  • 321' is the liquid area (shaded portion) corresponding to the first flexible electrode 321, assuming an area of 10, which produces a capacitance value of 10X (X is a capacitance per unit area);
  • 322' is a second flexible electrode 322 and an electrolyte The area (shaded portion) where the liquid 19 contacts.
  • the electrolytic capacitor of the embodiment of the present invention is mainly generated at the position of the first flexible electrode 321, so that in practical applications, the first flexible electrode 321 can be disposed in the middle portion of the electronic moisture absorption article 10.
  • the wet state detection of the electronic moisture absorbing article can be achieved by detecting the capacitance of the intermediate portion.
  • the second flexible electrode 322 as long as any portion thereof is in contact with the liquid 19 of the absorbing layer 15, the effect is substantially the same regardless of the contact area, since the liquid electrodes formed are the same. This feature greatly reduces the requirement for the second flexible electrode 322.
  • the embodiment of the invention Compared with other products of the same type, the embodiment of the invention not only has higher detection sensitivity, but also lower requirements for use, and increases product design flexibility. And the reliability of product use.
  • embodiments of the present invention also have adaptive humidity and saturation level monitoring functions through proper electrode design and configuration.
  • FIG. 5 it is a schematic diagram of a product design for implementing an adaptive humidity and saturation level monitoring function by partially overlapping the first and second flexible electrodes in the embodiment of the present invention.
  • the first flexible electrode 321 is on the other side (outer layer) of the flexible waterproof film 11, it is represented by a broken line in the drawing.
  • the first and second flexible electrodes are not completely separated left and right as shown in the foregoing illustration, but portions overlap in position (projection overlap), wherein the overlapping portions are indicated by 325 (shaded portions).
  • the orthographic projection of the second flexible electrode 322 on the surface of the flexible waterproof film 11 provided with the first flexible electrode 321 partially overlaps with the first flexible electrode 321 .
  • the width of the first flexible electrode 321 is equal to the width of the second flexible electrode 322, and the widths of the first and second flexible electrodes 321, 322 are both 3, and the width of the overlapping portion 325 is 1, the overlapping portion can generate a value of The initial capacitance value of 1Y (Y is the capacitance value generated by the unit width of the electrode) regardless of whether the electronic moisture absorbing article 10 is dry or wet.
  • the electrolyte liquid 19 becomes a liquid electrode 323 completely covering the first flexible electrode 321, that is, the overlapping portion of the two electrodes is changed from the original width 1 to the width 3, so that the first and second
  • the capacitance value detected between the flexible electrodes 321 and 322 is changed from 1Y to 3Y, that is, 1Y is a capacitance value in a dry state, 3Y is a capacitance value in a full-wet state, and a value between 1Y-3Y represents
  • the degree of moisture of the electronic moisture absorption article 10 is greater, and the greater the value, the more severe the degree of moisture.
  • the width of the overlapping portion 325 of the first and second flexible electrodes is preferably one-fifth to one-half of the width of the first and second flexible electrodes, so that the capacitance value in the all-wet state is relatively dry ( The initial state) has a one to four times increase in capacitance.
  • the maximum capacitance value can be used as the maximum capacitance value from twice to five times the initial capacitance value.
  • the first and second flexible electrodes 321, 322 are usually printed on the flexible waterproof film 11 by a gravure printing process using a conductive ink. Since the first and second flexible electrodes 321, 322 are on different surfaces of the flexible waterproof film 11, it is difficult to accurately position and control the width of the overlapping portion 325 during the production process, which causes an error in the initial capacitance value, thereby causing the humidity level detection. error. In order to solve this problem, another method can be used to control the width of the overlap. Referring specifically to FIG. 6, the first and second flexible electrodes 321, 322 are completely overlapped in the embodiment of the present invention, and adaptive moisture is achieved. Schematic diagram of product design for saturation level monitoring function.
  • the first and second flexible electrodes 321, 322 are not disposed on the left and right sides as in the other figures described above, but are overlapped on the longitudinal axis, that is, the second flexible electrode 322 is disposed on the first flexible electrode 321 .
  • An orthographic projection of the surface of the flexible waterproof film 11 is located inside the first flexible electrode 321; and the width of the first flexible electrode 321 is larger than the second flexible electrode 322, so that the second flexible electrode 322 can be completely covered in width, so that even 1.
  • the printing position of the second flexible electrodes 321, 322 is in error. As long as the second flexible electrode 322 is still within the width coverage of the first flexible electrode 321, the width and area of the overlapping portion may remain unchanged.
  • the capacitance value in the initial state (when dry) is equal to 1Y (Y is the capacitance value generated by the unit width of the electrode).
  • the electrolyte liquid 19 When the absorbing layer 15 is in the fully wet state, the electrolyte liquid 19 generates the electrolyte liquid electrode 323 to cover the entire first flexible electrode 321, and the capacitance value detected between the first and second flexible electrodes 321, 322 at this time is It is 3Y, that is, 1Y is in a dry state, 3Y is in a wet state, and a value between 1Y-3Y represents the degree of moisture of the electronic moisture absorption article 10 of the embodiment of the present invention. The more serious it is.
  • FIG. 7 is a schematic diagram of the degree of moisture of an electronic moisture absorption article according to an embodiment of the present invention.
  • the electronic moisture absorbent article 10 may be a diaper whose electrolyte liquid 19 in the absorbent layer 15 is urine. Since the second flexible electrode 322 can be in direct contact with the urine 19, the urine 19 is converted into a liquid electrode 323 having a wider coverage, which expands the coverage of the second flexible electrode 322.
  • the first flexible electrode 321 (the range of the dotted line representing the range of the electrode) is printed on the outer layer of the flexible waterproof film 11 (back to the absorbing layer 15), and its width is assumed to be three times that of the second flexible electrode.
  • the capacitance between the first and second flexible electrodes 321, 322 is about 1Y (Y is the capacitance value produced by the unit width of the electrode).
  • the capacitance value is about 3Y.
  • the numerical value between 1Y and 3Y represents the degree of moisture of the electronic moisture absorption article 10 of the embodiment of the present invention. By measuring the capacitance value, the degree of wetness can be known.
  • the first flexible electrode 321 is preferably 2-5 times the width of the second flexible electrode 322.
  • the initial capacitance value can be doubled to five times as the maximum capacitance value, and the maximum capacitance value corresponds to the maximum humidity level.
  • this is a schematic diagram of the capacitance and resistance effects of the first and second flexible electrodes of the embodiment of the present invention after being wetted by an electrolyte liquid (for example, urine).
  • 323 is a first equivalent liquid electrode formed by the second flexible electrode 322 on the inner layer (facing the absorption layer 15) of the flexible waterproof film 11 being wetted by the electrolyte liquid 19 in the absorption layer 15, and 324 is a flexible waterproof film 11
  • the first flexible electrode 321 on the outer layer (back to the absorption layer 15) is exposed to the electrolyte liquid 193 in the flexible protective layer 13 (where the electrolyte liquid 193 is the electrolyte liquid 19 in the absorption layer 15 of the absorbent article leaking to the electronic moisture absorption)
  • the second equivalent liquid electrode formed by the outer layer of the article 10 or by the wet hand touching the outer layer of the electronic moisture absorbent article 10 is wetted.
  • the high-impedance state is maintained between the first and second equivalent liquid electrodes 323, 324, and the influence of this high-impedance Rd on the capacitance Ca can be can be ignored.
  • the capacitance Ca is generated between the first and second equivalent liquid electrodes 323 and 324, and can be connected and effectively detected by the first and second flexible electrodes 321, 322. Since the Ca value is large and is not affected by the leakage resistance Rd between the first and second equivalent liquid electrodes 323, 324, the sensitivity and reliability of the system detection can be more effectively improved.
  • the flexible protective layer 13 covering the flexible waterproof film 11 can be removed, which can further reduce the production cost of the electronic moisture absorption article 10, thereby effectively reducing the price of the product and benefiting the consumer.
  • the embodiment of the invention further provides a method for detecting the moisture degree of the electronic moisture absorption article, comprising:
  • an electronic moisture absorbing article comprising: a flexible waterproof film laminated in order from bottom to top, an absorbing layer and a water permeable woven layer; disposed on the flexible waterproof film facing away from the absorbing layer At least one first flexible electrode on the surface; at least one second flexible electrode disposed on the surface of the flexible waterproof film facing the absorbing layer and located between the flexible waterproof film and the absorbing layer; An orthographic projection of the second flexible electrode on a surface of the flexible waterproof film provided with the first flexible electrode, partially overlapping the first flexible electrode forming portion;
  • the width of the first flexible electrode and the width of the second flexible electrode are equal, and the width of the overlapping region is between one-half and one-fifth of the width of the first flexible electrode or the second flexible electrode.
  • the width of the first flexible electrode is greater than the width of the second flexible electrode, and the orthographic projection of the second flexible electrode on the surface of the flexible waterproof film provided with the first flexible electrode is located at the first flexible Within the electrode, the width of the first flexible electrode is 2-5 times the width of the second flexible electrode.
  • the initial capacitance value is doubled to five times as the maximum capacitance value, corresponding to the maximum humidity level.
  • the range of capacitance values between the initial capacitance value and the maximum capacitance value is divided into 100 equal parts, which respectively correspond to a humidity degree of 0-100%.
  • the detection sensitivity is relatively low: please refer to FIG. 9 , which is a schematic diagram of the capacitance and resistance effect between the two electrodes of the existing electronic moisture absorption product.
  • the capacitance values between the flexible electrodes 121 and 122 provided on the same surface of the flexible waterproof film 11 are formed by connecting Ca and Cb in series, and the capacitance values in series are lower than any of Ca and Cb.
  • the lower the capacitance value, the lower the detection sensitivity, and the detection effect and application range will be reduced. If the value of Ca (as in the embodiment of the present invention) can be directly detected, the sensitivity of the system detection will be effectively improved.
  • 19 is an electrolyte liquid contained in the absorbing layer 15 and corresponding to the electrodes 121, 122 on the other side of the flexible waterproof film 11.
  • a dielectric capacitor Cc can be formed between the two electrodes 121 and 122 through the flexible waterproof film 11, and another dielectric capacitor Cd can be formed by the air between the two electrodes 121 and 122. Since the flexible waterproof film 11 is very soft, the distance between the two electrodes 121, 122 during use of the absorbent article (for example, a diaper) may vary depending on the user's wearing, sleeping, turning over, walking, and the like.
  • a false alarm is generated: in the foregoing prior art solution, since the two flexible electrodes 121 and 122 are on the same side of the flexible waterproof film 11, the leakage resistance Rd is easily affected by moisture between the electrodes, and the capacitance detection is disturbed. There are many factors that cause leakage resistance, such as a wet surface, or wet hands/skin contact with two electrodes.
  • the contact resistance of sweaty hands/skins usually ranges from tens of thousands of ohms to hundreds of kilo ohms. This resistance is enough to short the electrodes of the capacitance detection circuit, causing false alarms.
  • the capacitance values detected by the aforementioned prior art solutions are directly proportional to the degree of moisture of the electronic moisture absorption article, which value represents total wetness or saturation, except for flexibility
  • the material, thickness, and dielectric constant of the waterproof film 11 are also related to the length of the electronic moisture absorption article.
  • Users need to set up each type of model and brand of electronic moisture absorption products in order to know the more accurate indication of humidity and saturation, which will bring some inconvenience in use.
  • the situation of the embodiment of the present invention will be completely different. It can be known as the humidity and saturation degree of the absorbent article during the use of the absorbent article, and the thickness of the waterproof film of the absorbent article, the dielectric constant, and the absorbent article.
  • the parameters such as length are irrelevant.
  • the above description shows that the first flexible electrode and the second flexible electrode are respectively disposed on both sides of the flexible waterproof film of the electronic moisture absorption article, and the first and second flexible electrodes are partially provided.
  • the overlap produces a predicted initial capacitance value and becomes the basis for the determination of the degree of urinary moisture; the second flexible electrode can be directly in contact with the absorbing layer of the absorbent article; the flexible waterproof film, the first and second flexible electrodes are included in the absorption
  • the liquid in the layer forms a variable electrolytic capacitor having an electrolyte liquid electrode, and the humidity value of the electronic moisture absorption article can be known only by detecting the capacitance value of the variable electrolytic capacitor and the change thereof; It can be effectively improved, it can greatly enhance the anti-interference ability, and can prevent the hand or skin from touching the electrode to cause short circuit and false alarm. In addition, it can also adaptively detect the moisture and saturation of the absorbent product.

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Abstract

一种电子感湿吸收用品及其潮湿程度检测方法，其中，电子感湿吸收用品（10）包括：从下至上依次叠层的柔性防水薄膜（11）、吸收层（15）和透水编织物层（18），吸收层（15）用于吸收从透水编织物层（18）进入的液体；设置于柔性防水薄膜（11）背向吸收层（15）的表面上的至少一条第一柔性电极（321）；设置于柔性防水薄膜（11）朝向吸收层（15）的表面上，并位于柔性防水薄膜（11）与吸收层（15）之间的至少一条第二柔性电极（322）；柔性防水薄膜（11）、第一柔性电极（321）、第二柔性电极（322）以及包含于吸收层（15）中的液体构成一个无极性可变电解电容器，通过对无极性可变电解电容器的电容值的检测，获知电子感湿吸收用品（10）的潮湿状态。

Description

一种电子感湿吸收用品及其潮湿程度检测方法
本申请要求于2017年11月3日提交中国专利局、申请号为201711069654.X、发明名称为“一种电子感湿吸收用品及其潮湿程度检测方法”的中国专利申请的优先权，上述专利的全部内容通过引用结合在本申请中。
技术领域
本发明涉及吸收用品领域，尤其涉及一种电子感湿吸收用品及其潮湿程度检测方法。
背景技术
一次性吸收用品包括纸尿裤、纸尿片及卫生巾等吸收制品，所述一次性的吸收用品都存在需要适时更换的问题，如果更换过于频密，其不但麻烦而且浪费；但如果换得太迟，则有可能会造成液体泄漏，因为吸收用品的吸收能力是有限的。如何能动态检测及显示使用者的排泄情况，包括排泄次数、排泄量，以及吸收用品的吸收能力是否已接近饱和的情况，对吸收用品的合理使用具有相当的参考价值。
然而传统尿湿检测技术所提供的信息是有限的，其中最常见的一种技术是通过尿液将电极短路而产生尿湿提示信号，这种尿湿检测方式原则上只能检测到尿湿是否已经发生而不能检测到尿湿的程度如何，更不能提供整个尿湿过程的动态信息，以及吸收用品的吸收能力是否接近饱和的信息，这需要有新的技术方案去解决。
发明内容
本发明所要解决的技术问题在于，提供一种电子感湿吸收用品及其潮湿程度检测方法，可提升检测的灵敏度，增强抗干扰能力，防止潮湿的手或皮肤触碰到电极造成短路而出现误报警，并可自适应检测吸收制品的潮湿及饱和程度。
为了解决上述技术问题，本发明提供一种电子感湿吸收用品，包括：
从下至上依次叠层的柔性防水薄膜、吸收层和透水编织物层，所述吸收 层用于吸收从透水编织物层进入的液体；
设置于所述柔性防水薄膜背向所述吸收层的表面上的至少一条第一柔性电极；
设置于所述柔性防水薄膜朝向所述吸收层的表面上，并位于所述柔性防水薄膜与所述吸收层之间的至少一条第二柔性电极；
所述柔性防水薄膜、所述第一柔性电极、所述第二柔性电极以及包含于所述吸收层中的液体构成一个无极性可变电解电容器，其中，所述第一柔性电极、第二柔性电极作为所述无极性可变电解电容器的两个电极，所述柔性防水薄膜作为所述无极性可变电解电容器的电介质，所述吸收层中的液体作为所述无极性可变电解电容器的液态电解质，通过对所述无极性可变电解电容器的电容值的检测，获知所述电子感湿吸收用品的潮湿状态。
其中，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，与所述第一柔性电极形成部分重叠。
其中，所述第一柔性电极的宽度与第二柔性电极的宽度相等，并且所述重叠区域的宽度为所述第一柔性电极或第二柔性电极宽度的五分之一至二分之一。
其中，所述第一柔性电极的宽度大于所述第二柔性电极的宽度，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，位于所述第一柔性电极之内。
其中，所述第一柔性电极的宽度为所述第二柔性电极宽度的2-5倍。
本发明还提供一种电子感湿吸收用品的潮湿程度检测方法，包括：
提供一电子感湿吸收用品，所述电子感湿吸收用品包括：从下至上依次叠层的柔性防水薄膜、吸收层和透水编织物层；设置于所述柔性防水薄膜背向所述吸收层的表面上的至少一条第一柔性电极；设置于所述柔性防水薄膜朝向所述吸收层的表面上，并位于所述柔性防水薄膜与所述吸收层之间的至少一条第二柔性电极；所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，与所述第一柔性电极形成部分重叠；
获取所述第一柔性电极与所述第二柔性电极之间产生的、与重叠区域宽度成正比的初始电容值；
对所述第一柔性电极与所述第二柔性电极之间的电容值进行监测，并将监测到的电容值作为实际电容值；
将所述实际电容值与所述初始电容值进行比较，根据电容值变化范围判断所述电子感湿吸收用品的潮湿程度。
其中，所述第一柔性电极的宽度和所述第二柔性电极的宽度相等，所述重叠区域宽度为所述第一柔性电极或第二柔性电极宽度的二分之一至五分之一。
其中，所述第一柔性电极的宽度大于所述第二柔性电极的宽度，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，位于所述第一柔性电极之内，所述第一柔性电极的宽度为所述第二柔性电极宽度的2-5倍。
其中，将所述初始电容值的二倍至五倍作为最大电容值，所述最大电容值对应最大潮湿程度。
其中，将所述初始电容值至最大电容值之间的电容值变化范围划分为100等分，分别对应0-100％的潮湿程度。
本发明实施例的有益效果在于，通过在电子感湿吸收用品的柔性防水薄膜两侧表面分别设置第一柔性电极及第二柔性电极，并令第一、第二柔性电极有部分重叠产生一个预知的初始电容值，并成为尿湿程度判断的基础；所述第二柔性电极可直接与吸收用品的吸收层接触；上述柔性防水薄膜、第一、第二柔性电极以及包含于吸收层中的液体形成一个具有电解质液体电极的可变电解电容器，只需对该可变电解电容器的电容值及其变化进行检测，便可获知电子感湿吸收用品的潮湿状态；不但可使检测灵敏度得到有效提升，更可大大增强抗干扰能力，并能防止潮湿的手或皮肤同时触碰到两电极造成短路而出现误报警的情况，此外还可自适应检测吸收制品的潮湿及饱和程度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例一种电子感湿吸收用品的剖面结构示意图。
图2为本发明实施例一种电子感湿吸收用品的两电极之间的电容及电阻效应示意图。
图3为本发明实施例对电子感湿吸收用品实施电容检测的结构示意图。
图4为本发明实施例中潮湿面积与电容的关系示意图。
图5为本发明实施例一种电子感湿吸收用品的通过第一、第二柔性电极部分重叠，实现自适应的潮湿及饱和程度监测功能的设计示意图。
图6为本发明实施例一种电子感湿吸收用品的第一、第二柔性电极完全重叠，实现自适应的潮湿及饱和程度监测功能的设计示意图。
图7为本发明实施例一种电子感湿吸收用品的潮湿程度示意图。
图8为本发明实施例一种电子感湿吸收用品的第一、第二柔性电极均被电解质液体湿透后的电容及电阻效应示意图。
图9为现有电子感湿吸收用品的两电极之间的电容及电阻效应示意图。
具体实施方式
以下各实施例的说明是参考附图，用以示例本发明可以用以实施的特定实施例。本发明所提到的方向和位置用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「顶部」、「底部」、「侧面」等，仅是参考附图的方向或位置。因此，使用的方向和位置用语是用以说明及理解本发明，而非对本发明保护范围的限制。
下面结合附图对本发明作进一步的描述。请参照图1所示，这是本发明实施例一种电子感湿吸收用品的剖面结构示意图，图中电子感湿吸收用品10包括：
从下至上依次叠层的柔性防水薄膜11、吸收层15和透水编织物层18，所述吸收层15用于吸收从透水编织物层18进入的液体；
设置于所述柔性防水薄膜11背向所述吸收层15的表面上的至少一条第一柔性电极321；
设置于所述柔性防水薄膜11朝向所述吸收层15的表面上，并位于所述柔性防水薄膜11与所述吸收层15之间的至少一条第二柔性电极322；
所述柔性防水薄膜11、所述第一柔性电极321、所述第二柔性电极322以及包含于所述吸收层15中的液体19构成一个无极性可变电解电容器，其中，所述第一柔性电极321、第二柔性电极322作为所述无极性可变电解电容器的两个电极，所述柔性防水薄膜11作为所述无极性可变电解电容器的电介质，所述吸收层15中的液体19作为所述无极性可变电解电容器的液态电解质，通过对所述无极性可变电解电容器的电容值的检测，可获知所述电子感湿吸收用品10的潮湿状态。
本实施例中，第一柔性电极321和第二柔性电极322被分别设置于柔性防水薄膜11不同的表面(图1所示的下表面和上表面)上，第二柔性电极322会直接与包含在吸收层15中的电解质液体19相接触。由于电解质具有良导电性，其可令整个电解质液体19处于与第二柔性电极322等电位状态(忽略相关的内阻)，从而令覆盖在柔性防水薄膜11上的整个液面等效为一个液体电极323，这和常规电解电容器以电解质液体为实际负极的情况极为相似。具体来说，本发明实施例的液体电极323扩展了第二柔性电极322的覆盖范围，并当所述液体电极323覆盖到第一柔性电极321正对面的柔性防水薄膜11表面(即上表面)时，便可生成一个相应的电解电容，该电解电容的电容值与液体电极323覆盖第一柔性电极321对应的柔性防水薄膜11表面积成正比，即是说液体电极323与第一柔性电极321相对应/覆盖的面积越大，该电解电容的电容值就越大。
在实际应用中，吸收用品10的外表面，即柔性防水薄膜11背向吸收层15的这一面，还可覆盖有一层无纺布13，该无纺布可增强柔性防水薄膜11的强度，改善本实施例电子感湿吸收用品10的触摸手感，并可保护第一柔性电极321，因此这无纺布亦可称为柔性保护层。在吸收层15中，通常还包括木浆、棉浆等吸收材料16，以及高分子吸水树脂(SAP)17等。本实施例电子感湿吸收用品10具体可以是纸尿裤、纸尿片、纸尿垫、卫生巾等一次性吸收用品，第一柔性电极321和第二柔性电极322为采用碳性导电油墨在柔性防水薄膜11(上述电子感湿吸收用品的底膜)上印刷而成的尿湿感应线。
下面请参照图2所示，这是本发明实施例的两电极之间的电容及电阻效 应示意图。图中可见第一、第二柔性电极321、322之间的电容值，等于第一柔性电极321与等效液体电极323之间的电容值Ca，而与第二柔性电极322的大小和位置无关，只要其与电解质液体19相接触便行。
进一步地，由于第一柔性电极321与第二柔性电极322分别处于柔性防水薄膜11的不同表面上，潮湿的手及皮肤无法同时接触到所述两个不同表面的电极，这可有效避免误两电极之间产生漏电，防止报警情况的发生。事实上，由于柔性防水薄膜11是防水绝缘的，即使其两面都被液体湿透，两电极321、322仍然被柔性防水薄膜11所分隔，两电极之间的漏电阻Rd始终处于高阻抗状态，不会对工作产生影响，因此在本发明实施例中，Rd可以忽略不计。
下面请再参照图3所示，这是本发明实施例中对电子感湿吸收用品实施电容检测的结构示意图。为了监测吸收用品10的潮湿情况，图3中包括有一个电容检测装置20，所述电容检测装置20与电子感湿吸收用品10的第一柔性电极321、第二柔性电极322相连接，由于前述无极性可变电解电容器的电容值与包含在吸收层15中的液体含量及分布有关，因此通过实时监测两电极之间的电容值变化情况，可实现电子感湿吸收用品10的潮湿程度监测。
下面请参照图4所示，为本发明实施例的潮湿面积与电容的关系的一个示意图。图中设置在柔性防水薄膜11外层的第一柔性电极321用虚线表示；设置在柔性薄膜11内层的第二柔性电极322用实线表示；19为包含在吸收层15中的电解质液体(例如尿液)。321’为第一柔性电极321相对应的液体面积(阴影部分)，假设面积为10，其产生的电容值为10X(X为单位面积的电容量)；322’为第二柔性电极322与电解质液体19接触的面积(阴影部分)。由于本发明实施例的第二柔性电极322直接与电解质液体19相接触，可形成一个等电位的液体电极323，不管第二柔性电极322与电解质液体19接触面积是多少，其效果都是一样的(当忽略电解质液体电阻时)。根据本发明实施例的电容计算方法(两电极之间的电解电容值C等于第一柔性电极321与液体电极323之间的电容Ca)，有C＝Ca＝10X。
从中可以发现，本发明实施例的电解电容主要是在第一柔性电极321的 位置上产生的，因此在实际应用中，可以将第一柔性电极321设置在电子感湿吸收用品10的中间部分，只要对中间部分的电容进行检测便可实现对电子感湿吸收用品的潮湿状态检测。至于第二柔性电极322，只要其有任一部分与吸收层15的液体19接触便可，不管接触面积大小，效果基本上都是一样的，因为其形成的液体电极都是一样的。这种特性大大降低了对第二柔性电极322的要求，与同类其它产品相比，本发明实施例不但具有更高的检测灵敏度，并且对使用的要求也较低，增加了产品设计的灵活性及产品使用的可靠性。
进一步地，通过适当的电极设计及配置，本发明实施例还具有自适应的潮湿及饱和程度监测功能。下面请参照图5所示，这是本发明实施例的通过第一、第二柔性电极部分重叠，实现自适应的潮湿及饱和程度监测功能的产品设计示意图。图中由于第一柔性电极321在柔性防水薄膜11的另一面(外层)，所以图中用虚线来代表。并且，第一、第二柔性电极并没有像前述图例显示的那样左右完全分开，而是有部分在位置上重叠(投影重叠)在一起了，其中重叠部分用325来标示(阴影部分)。具体来说，第二柔性电极322在设置有第一柔性电极321的柔性防水薄膜11表面的正投影，与第一柔性电极321形成部分重叠。假设第一柔性电极321的宽度与第二柔性电极322的宽度相等，并且第一、第二柔性电极321、322的宽度均为3，重叠部分325的宽度为1，则重叠部分可产生数值为1Y(Y为电极单位宽度所产生的电容值)的初始电容值，而不管电子感湿吸收用品10处于干爽还是处于潮湿状态。
当吸收层15处于全湿状态时，电解质液体19成为一个完全覆盖第一柔性电极321的液体电极323，即两电极重叠部分由原来的宽度1变为宽度3了，这样在第一、第二柔性电极321、322之间检测到的电容值便从1Y变为3Y了，即是说1Y为干爽状态的电容值，3Y为全湿状态的电容值，1Y-3Y之间的数值就代表了本发明实施例电子感湿吸收用品10的潮湿程度，数值越大，潮湿程度就越严重。在实际应用中，第一、第二柔性电极的重叠部分325的宽度优选为第一、第二柔性电极宽度的五分之一至二分之一，令全湿状态的电容值较干爽状态(初始状态)的电容值有一至四倍的增长。可将初 始电容值的二倍至五倍作为最大电容值，以该最大电容值对应最大潮湿程度。
在实际应用中，第一、第二柔性电极321、322通常是采用导电油墨经凹版印刷工艺印刷在柔性防水薄膜11上的。由于第一、第二柔性电极321、322处于柔性防水薄膜11的不同表面上，在生产过程中难以精确定位控制重叠部分325的宽度，这会造成初始电容值的误差，从而造成潮湿程度检测的误差。为了解决这个问题，可采用另外一种方法来控制重叠的宽度，具体参照图6所示，这是本发明实施例第一、第二柔性电极321、322完全重叠，并实现自适应的潮湿及饱和程度监测功能的产品设计示意图。
图中第一、第二柔性电极321、322并没有像前述其它图例那样是左右设置的，而是在纵轴线上重叠在一起了，即第二柔性电极322在设置有第一柔性电极321的柔性防水薄膜11表面的正投影，位于第一柔性电极321之内；并且第一柔性电极321的宽度大于第二柔性电极322，从而可在宽度上将第二柔性电极322完全覆盖，这样即使第一、第二柔性电极321、322印刷位置有误差，只要第二柔性电极322仍在第一柔性电极321的宽度覆盖范围之内，其重叠部分的宽度及面积便可保持不变。假设第二柔性电极322的宽度为1，第一柔性电极321的宽度为3，则在初始状态下(干爽时)的电容值等于1Y(Y为电极单位宽度所产生的电容值)。而当吸收层15处于全湿状态时，电解质液体19生成电解质液体电极323便覆盖了整个第一柔性电极321，此时在第一、第二柔性电极321、322之间检测到的电容值便为3Y了，即是说1Y为干爽状态，3Y为全湿状态，而处于1Y-3Y之间的数值就代表了本发明实施例电子感湿吸收用品10的潮湿程度，数值越大，潮湿程度就越严重。
这个设计的特点可以实现自适应的潮湿及饱和程度监测，而不管柔性防水薄膜11的厚度、介电常数及电子感湿吸收用品10的长度。请参照图7，这是本发明实施例一种电子感湿吸收用品的潮湿程度示意图。作为一种具体应用，电子感湿吸收用品10可以是纸尿裤，其吸收层15中的电解质液体19为尿液。由于第二柔性电极322可与尿液19直接接触，令尿液19转化为覆盖面更广的液体电极323，扩大了第二柔性电极322的覆盖范围。
图中第一柔性电极321(虚线范围代表电极的范围)印刷在柔性防水薄膜11外层(背向吸收层15)，其宽度假设为第二柔性电极的3倍。当无尿湿情况发生时，第一、第二柔性电极321、322之间的电容值约为1Y(Y为电极单位宽度所产生的电容值)。当吸收层15全湿时，电容值约为3Y。处于1Y-3Y之间的数值就代表了本发明实施例电子感湿吸收用品10的潮湿程度。通过对该电容值的检测便可知道尿湿的程度了。在实际应用中，第一柔性电极321优选为第二柔性电极322宽度的2-5倍。同时，可将初始电容值的二倍至五倍作为最大电容值，以该最大电容值对应最大潮湿程度。
下面请参照图8所示，这是本发明实施例的第一、第二柔性电极均被电解质液体(例如尿液)湿透后的电容及电阻效应示意图。图中323为柔性防水薄膜11内层(面向吸收层15)上的第二柔性电极322被吸收层15中的电解质液体19湿透后形成的第一等效液体电极，324为柔性防水薄膜11外层(背向吸收层15)上的第一柔性电极321被柔性保护层13中的电解质液体193(此处电解质液体193是吸收用品的吸收层15中的电解质液体19泄漏到电子感湿吸收用品10的外层造成的，或是因为潮湿的手触摸到电子感湿吸收用品10的外层而留下的)湿透后形成的第二等效液体电极。在图中由于有作为绝缘电介质的柔性防水薄膜11的阻隔，令第一、第二等效液体电极323、324之间仍保持着高阻抗状态，这个高阻抗状态的Rd对电容Ca的影响可忽略不计。电容Ca在第一、第二等效液体电极323与324之间生成，并可被第一、第二柔性电极321、322连接及有效检测。由于Ca值较大，并且不受第一、第二等效液体电极323、324之间的漏电阻Rd影响，因此可更有效改善系统检测的灵敏度及可靠性。
由于本发明实施例的系统的第一、第二柔性电极321、322不在同一表面上，不用再担心两个电极被尿液尿湿短路，或被潮湿的手或皮肤短路而出现误报警的情况，因此在实际应用中可将覆盖在柔性防水薄膜11上的柔性保护层13去掉，这样可进一步降低电子感湿吸收用品10的生产成本，从而可有效降低产品的价格，令消费者受惠。
相应于前述电子感湿吸收用品，本发明实施例还提供一种电子感湿吸收用品的潮湿程度检测方法，包括：
提供一电子感湿吸收用品，所述电子感湿吸收用品包括：从下至上依次叠层的柔性防水薄膜、吸收层和透水编织物层；设置于所述柔性防水薄膜背向所述吸收层的表面上的至少一条第一柔性电极；设置于所述柔性防水薄膜朝向所述吸收层的表面上，并位于所述柔性防水薄膜与所述吸收层之间的至少一条第二柔性电极；所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，与所述第一柔性电极形成部分重叠；
获取所述第一柔性电极与所述第二柔性电极之间产生的、与重叠区域宽度成正比的初始电容值；
对所述第一柔性电极与所述第二柔性电极之间的电容值进行监测，并将监测到的电容值作为实际电容值；
将所述实际电容值与所述初始电容值进行比较，根据电容值变化范围判断所述电子感湿吸收用品的潮湿程度。
其中，所述第一柔性电极的宽度和所述第二柔性电极的宽度相等，所述重叠区域宽度为所述第一柔性电极或第二柔性电极宽度的二分之一至五分之一。
其中，所述第一柔性电极的宽度大于所述第二柔性电极的宽度，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，位于所述第一柔性电极之内，所述第一柔性电极的宽度为所述第二柔性电极宽度的2-5倍。
其中，将所述初始电容值的二倍至五倍作为最大电容值，对应最大潮湿程度。
其中，将所述初始电容值至最大电容值之间的电容值变化范围划分为100等分，分别对应0-100％的潮湿程度。
需要说明的是，现有的一些电子感湿吸收用品，其在柔性防水薄膜的同一面设置两条柔性导电电极的方式，虽然也能实现上述类似的量化尿湿检测功能，但在实际应用中，上述现有技术方案存在有不少不足之处，其中包括：
检测灵敏度相对较低：请参照图9所示，这是现有电子感湿吸收用品的两电极之间的电容及电阻效应示意图。图中设置在柔性防水薄膜11同一面的柔性电极121及122之间的电容值，是由Ca和Cb串联而成，串联之后电 容值比Ca及Cb的任一个数值都要低。电容值越低，检测灵敏度也就越低，其检测效果及适用范围都会随之降低。如果能直接检测Ca(如本发明实施例)的数值，将会有效提升系统检测的灵敏度。
容易受干扰：图中19为包含在吸收层15内，并在柔性防水薄膜11另一面与电极121、122相对应的电解质液体。这个结构除了可生成Ca、Cb之外，两电极121、122之间还可以通过柔性防水薄膜11生成一个介质电容Cc，以及通过两电极121、122之间的空气形成另一个介质电容Cd。由于柔性防水薄膜11是很柔软的，在吸收用品(例如纸尿裤)使用过程中，两电极121、122之间的距离会因应使用者的穿着、睡眠、翻身、行走等不同情况而变化。如果Cc与Cd的并联值，能够与Ca与Cb串联值相比的话，就会对系统检测的可靠性带来实质性影响；如果以不小心将两电极121、122碰在一起的话，更会令系统出现短路的情况，而这个情况在本发明实施例中是不会出现的。
产生误报警：在前述现有技术方案中，由于两条柔性电极121、122是在柔性防水薄膜11的同一面，两电极之间容易受潮湿影响产生漏电阻Rd，并对电容检测造成干扰。产生漏电阻的因素很多，例如潮湿的表面，或潮湿的手/皮肤接触到两条电极等。有汗气的人手/皮肤的接触电阻通常从几十千欧到几百千欧不等，这个电阻足以令电容检测回路的电极短路，造成误报警。即使在柔性防水薄膜11上覆盖一保护层13(通常为无纺布)也不能完全防止这种情况发生，因为无纺布是不防水的，其潮湿状态或潮湿的手触碰到无纺布也会影响检测的可靠性，出现误报警情况。
无法自适应检测吸收制品的潮湿及饱和程度：虽然前述现有技术方案检测到的电容值与电子感湿吸收用品的潮湿程度也是成正比的，但哪一个数值代表全湿或饱和，除了与柔性防水薄膜11的材质、厚度及介电常数有关之外，还与电子感湿吸收用品的长度有关。柔性防水薄膜11越薄，介电常数越大，电子感湿吸收用品越长，两电极之间的电容值就越大。用户需要对每一种规格型号及品牌的电子感湿吸收用品进行设置才能获知较准确的潮湿及饱和程度的指示，这在使用上会带来一定的不便。而本发明实施例的情况将完全不同，它只要监测吸收用品在使用过程中的电容变化率便可知道其潮 湿及饱和程度了，与吸收用品防水薄膜的厚度、介电常数，以及吸收用品的长度等参数无关。
通过上述说明可知，本发明实施例的有益效果在于，通过在电子感湿吸收用品的柔性防水薄膜两侧分别设置第一柔性电极及第二柔性电极，并令第一、第二柔性电极有部分重叠产生一个预知的初始电容值，并成为尿湿程度判断的基础；所述第二柔性电极可直接与吸收用品的吸收层接触；上述柔性防水薄膜、第一、第二柔性电极以及包含于吸收层中的液体形成一个具有电解质液体电极的可变电解电容器，只需对该可变电解电容器的电容值及其变化进行检测，便可获知电子感湿吸收用品的潮湿状态；不但可使检测灵敏度得到有效提升，更可大大增强抗干扰能力，并能防止潮湿的手或皮肤触碰到电极造成短路而出现误报警的情况，此外还可自适应检测吸收制品的潮湿及饱和程度。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (10)

  1. 一种电子感湿吸收用品，其中，包括：
    从下至上依次叠层的柔性防水薄膜、吸收层和透水编织物层，所述吸收层用于吸收从透水编织物层进入的液体；
    设置于所述柔性防水薄膜背向所述吸收层的表面上的至少一条第一柔性电极；
    设置于所述柔性防水薄膜朝向所述吸收层的表面上，并位于所述柔性防水薄膜与所述吸收层之间的至少一条第二柔性电极；
    所述柔性防水薄膜、所述第一柔性电极、所述第二柔性电极以及包含于所述吸收层中的液体构成一个无极性可变电解电容器，其中，所述第一柔性电极、第二柔性电极作为所述无极性可变电解电容器的两个电极，所述柔性防水薄膜作为所述无极性可变电解电容器的电介质，所述吸收层中的液体作为所述无极性可变电解电容器的液态电解质，通过对所述无极性可变电解电容器的电容值的检测，获知所述电子感湿吸收用品的潮湿状态。
  2. 如权利要求1所述的电子感湿吸收用品，其中，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，与所述第一柔性电极形成部分重叠。
  3. 如权利要求2所述的电子感湿吸收用品，其中，所述第一柔性电极的宽度与第二柔性电极的宽度相等，并且所述重叠区域的宽度为所述第一柔性电极或第二柔性电极宽度的五分之一至二分之一。
  4. 如权利要求1所述的电子感湿吸收用品，其中，所述第一柔性电极的宽度大于所述第二柔性电极的宽度，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，位于所述第一柔性电极之内。
  5. 如权利要求4所述的电子感湿吸收用品，其中，所述第一柔性电极的宽度为所述第二柔性电极宽度的2-5倍。
  6. 一种电子感湿吸收用品的潮湿程度检测方法，其中，包括：
    提供一电子感湿吸收用品，所述电子感湿吸收用品包括：从下至上依次叠层的柔性防水薄膜、吸收层和透水编织物层；设置于所述柔性防水薄膜背向所述吸收层的表面上的至少一条第一柔性电极；设置于所述柔性防水薄膜 朝向所述吸收层的表面上，并位于所述柔性防水薄膜与所述吸收层之间的至少一条第二柔性电极；所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，与所述第一柔性电极形成部分重叠；
    获取所述第一柔性电极与所述第二柔性电极之间产生的、与重叠区域宽度成正比的初始电容值；
    对所述第一柔性电极与所述第二柔性电极之间的电容值进行监测，并将监测到的电容值作为实际电容值；
    将所述实际电容值与所述初始电容值进行比较，根据电容值变化范围判断所述电子感湿吸收用品的潮湿程度。
  7. 如权利要求6所述的潮湿程度检测方法，其中，所述第一柔性电极的宽度和所述第二柔性电极的宽度相等，所述重叠区域宽度为所述第一柔性电极或第二柔性电极宽度的二分之一至五分之一。
  8. 如权利要求6所述的潮湿程度检测方法，其中，所述第一柔性电极的宽度大于所述第二柔性电极的宽度，所述第二柔性电极在设置有所述第一柔性电极的柔性防水薄膜表面的正投影，位于所述第一柔性电极之内，所述第一柔性电极的宽度为所述第二柔性电极宽度的2-5倍。
  9. 如权利要求6所述的潮湿程度检测方法，其中，将所述初始电容值的二倍至五倍作为最大电容值，所述最大电容值对应最大潮湿程度。
  10. 如权利要求9所述的潮湿程度检测方法，其中，将所述初始电容值至最大电容值之间的电容值变化范围划分为100等分，分别对应0-100％的潮湿程度。
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