CN101223437B - Water content detection sensor - Google Patents
Water content detection sensor Download PDFInfo
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- CN101223437B CN101223437B CN2006800256187A CN200680025618A CN101223437B CN 101223437 B CN101223437 B CN 101223437B CN 2006800256187 A CN2006800256187 A CN 2006800256187A CN 200680025618 A CN200680025618 A CN 200680025618A CN 101223437 B CN101223437 B CN 101223437B
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- resistance lead
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- water content
- low resistance
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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
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
A circuit including low-resistance conductive lines (1, 2) extending in parallel to each other and a high-resistance conductive line (3) connecting the ends of the low-resistance conductive lines is sandwiched between a water-proof and insulating support body (4) and a coating body (5). Exposure holes (6) are formed in the coating body to expose the low-resistance conductive lines at a plurality of positions. While current is fed to the circuit unit, if moisture adheres to a portion between the exposure holes to short-circuit between the low-resistance conductive lines, the current value is increased as compared to the state before the moisture has adhered. When a small current flows, it is judged that the circuit is normal and when a large current flows due to short-circuit, it is judged that a moisture is generated. It is possible to judge in advance whether the moisture sensor operates normally.
Description
Technical field
The present invention relates to water content detection sensor.
Background technology
In the past, if attachment of moisture is between electrode, electric current flowed, and the water content detection sensor of existence, generation that then detects moisture is by known (for example, with reference to patent documentation 1,2,3).This water content detection sensor for example is used for automatic wiper, the diaper of automobile.
Patent documentation 1: the spy opens clear 63-290950 communique
Patent documentation 2: the spy opens the 2000-19136 communique
Patent documentation 3: the spy opens the 2002-82080 communique
Because water content detection sensor in the past is to make to produce potential difference (PD) between the electrode, if attachment of moisture is between electrode, electric current flows, and then output has produced the signal of moisture, so, to normally whether can not differentiating of the loop that comprises electrode etc.Therefore, though can produce attachment of moisture between electrode,, can not detect the generation of moisture, the problem of existence because the bad grade of electrode does not produce signal.
In addition, under the situation of the detection that in the past water content detection sensor is used to urinate in diaper etc., exist if want repeated detection to urinate, resistance change then causes the problem of misoperation easily.
Therefore, the purpose of this invention is to provide a kind of water content detection sensor that can address the above problem a little.
Summary of the invention
In order to address the above problem a little, a kind of water content detection sensor is adopted in first invention, in this moisture transducer, the low resistance lead (1 that contains extension arranged side by side, 2) and link low resistance lead (1, the loop portion of the high resistance lead (3) between the end 2) is sandwiched between the supporting body (4) and nappe (5) that all has water proofing property and insulativity, make low resistance lead (1,2) spreading all over the hole (6) of exposing of exposing at a plurality of positions is formed on nappe (5) or the supporting body (4), if flow under the state of loop portion at electric current, moisture (W) is attached to exposing between hole (6), low resistance lead (1,2) short circuit between then with before moisture (W) adheres to is compared, and current value increases.
In addition, following water content detection sensor is adopted in second invention, that is, in the water content detection sensor of first invention, low resistance lead (1,2) and high resistance lead (3) are printed on the supporting body (4) of film like, from it face printing nappe (5).
In addition, following water content detection sensor is adopted in the 3rd invention, that is, and and in the water content detection sensor of first or second invention, the position corresponding with exposing hole (6) of low resistance lead (1,2) becomes the enlarged portion (6a) that has than exposing the big area in hole (6).
In addition, following water content detection sensor is adopted in the 4th invention, promptly, in the water content detection sensor of any one in first to the 3rd invention, form at the position that moisture (W) is concentrated easily low resistance lead (1,2) extension (1a, 2a) and expose hole (6).
In addition, following water content detection sensor is adopted in the 5th invention, that is, in the water content detection sensor of any one in first to fourth invention, supporting body (4) and nappe (5) go up form run through the moisture of show inner room pass through the hole (9a, 9b).
In addition, following water content detection sensor is adopted in the 6th invention, that is, in the water content detection sensor of first invention, low resistance lead and high resistance lead are by the electric conductivity ink print that contains conductive carbon.
In this case, the printer's ink of low resistance lead is to compare with the printer's ink of high resistance lead to contain more conductive carbon.
In addition, following water content detection sensor is adopted in the 8th invention, that is, in the water content detection sensor of first invention, be provided with the nappe that exposes the hole or supporting body and form as the laminated body of printer's ink layer, and the one deck at least in this laminated body is formed by anti-urine China ink.
In this case, can be that being in the laminated body prevents that the one deck at least between urine China ink layer and low resistance lead and the high resistance lead is formed by anti-solvent inkjet ink.The urethane that anti-urine China ink can be the pure and mild isocyanate of polyester polyols is in conjunction with China ink or UV hardening resin China ink.In addition, anti-solvent inkjet ink can be the vibrin China ink.
In addition, following water content detection sensor is adopted in the 12 invention, that is, in the water content detection sensor of first invention, low resistance lead and high resistance lead only contain the electric conductivity ink print of conductive carbon by as conductive material.
The invention effect
According to first invention, because if flow under the state of loop portion, because moisture (W) attached to exposing between hole (6), causes parallel low resistance lead (1 at electric current, 2) short circuit between, then with before moisture (W) adheres to compare, in the electric current increase of loop flow, so, can confirm on the whether normal basis of loop portion, use as water content detection sensor, therefore, the existence that can correctly detect moisture (W) whether.
According to second invention, water content detection sensor can be formed very thin, at narrow position, exist concavo-convex position etc. also can be provided with.
According to the 3rd invention,, also can improve precision as water content detection sensor even under the thin situation of low resistance lead.
According to the 4th invention, can improve sensitivity as water content detection sensor.
According to the 5th invention, even because moisture is present in an opposite side of exposing hole (6), moisture also can by moisture by the hole (9a 9b) flows to and exposes hole (6) side, so, can detect the existence of moisture (W) rightly.
Description of drawings
Fig. 1 is the exterior view of the water content detection sensor of relevant embodiments of the present invention 1.
Fig. 2 is the inside figure of water content detection sensor.
Fig. 3 is the vertical view of loop portion.
Fig. 4 is that the IV-IV alignment is looked cut-open view among Fig. 1.
Fig. 5 is the vertical view of loop portion of the water content detection sensor of relevant embodiments of the present invention 2.
Fig. 6 is the vertical view of loop portion of the water content detection sensor of relevant embodiments of the present invention 3.
Fig. 7 is cut-open view water content detection sensor, identical with Fig. 4 of relevant embodiments of the present invention 4.
Symbol description
1,2... low resistance lead; 1a, the 2a... extension; 3... high resistance lead; 4... supporting body; 5... nappe; 6... expose the hole; 6a... enlarged portion; 9a, 9b... moisture passes through the hole; W... moisture;
Embodiment
Below, with reference to accompanying drawing, illustrate to be used to implement best mode of the present invention.
[embodiment 1]
As shown in Figures 1 to 4, this water content detection sensor has loop portion, and this loop portion contains the low resistance lead 1,2 of extension arranged side by side and links high resistance lead 3 between the end of low resistance lead 1,2.This loop portion is sandwiched between the supporting body 4 and nappe 5 that all has water proofing property and insulativity, makes low resistance lead 1,2 spread all over the hole 6 of exposing of exposing at a plurality of positions and is formed on the nappe 5.
Supporting body 4 is parts of the integral body of this water content detection sensor of carrying, is formed the band shape of free flexing.Supporting body 4 is in order to make the moisture can be by not having water proofing property, can conducting and have insulativity in order to make electricity.In addition, in order normally whether easily to confirm loop portion, wish to be formed pellucidly.Supporting body 4 is made by the double shaft extensioning film of polypropylene, tygon, Polyvinylchloride, polyester, polyamide, polyimide, polyamidoimide, polycarbonate, polystyrene etc.The thickness of supporting body 4 wishes it is 30 μ m-300 μ m, more wishes it is 50 μ m-100 μ m.
The low resistance lead 1,2 of loop portion is provided with many, and extend abreast as the both side edges of the band-like film of supporting body 4 on the edge respectively. Low resistance lead 1,2 is by using the electric conductivity China ink, is printed on the supporting body 4 and forms.
The electric conductivity China ink is that mixed adhesive, conductive metal powder, other filling agent form, as bonding agent, can use polyvinyl chloride resin, polypropylene-based resin, epikote, polyester resin, polypropylene urethane esters resin, polyolefin resin, polyurethane resinoid, phenol resin etc.As the conductive metal powder, can use silver, gold, copper, nickel, aluminium, conductive carbon etc.Filling agent contains viscosity modifier, spreading agent etc.By serigraphy, directly intaglio printing, aniline printing etc., the electric conductivity China ink is coated on the supporting body 4 with thin band shape, in view of the above, form low resistance lead 1,2.Each low resistance lead 1,2 for example is printed as that width is 1mm, and thickness is 10 μ m, and hope is 5 μ m-30 μ m.The amount of the conductive metal powder by for example adjusting above-mentioned electric conductivity China ink wishes that making the resistance value of this low resistance lead 1,2 is 0-200k Ω, more wishes for smaller or equal to 100k Ω.In this embodiment 1, be set at 100k Ω degree.
The high resistance lead 3 of loop portion by with the electric conductivity China ink of the same composition of the electric conductivity of the printing that is used for low resistance lead 1,2 China ink, with same mode of printing printing.But the amount of the conductive metal powder that contains in the electric conductivity China ink is few, and its result is that the resistance value of high resistance lead 3 is set greatlyyer than the resistance value of low resistance lead 1,2, for example sets several M Ω degree for.In addition,, form carefullyyer, for example be formed width 0.5mm degree than low resistance lead 1,2 for the ease of distinguishing with low resistance lead 1,2.In addition, high resistance lead 3 extends to the other end along this low resistance lead 1 from an end of a low resistance lead 1, towards the other end of another low resistance lead 2, extends to the one end along this low resistance lead 2.Its result is, high resistance lead 3 and low resistance lead 1,2 become a wire and link to each other on supporting body 4, owing to form potential difference (PD) between the rearward end of low resistance lead 1,2, therefore, a certain amount of electric current flows.The resistance value of high resistance lead 3 wishes to be set in 1M Ω-10M Ω, more wishes to be set in 2M Ω-6M Ω.
Connecting guide line 7,8 in the other end of two low resistance leads 1,2.This guide line 7,8 also be by the electric conductivity ink print on supporting body 4.Employed electric conductivity China ink uses the identical China ink of electric conductivity China ink with low resistance lead 1,2 usefulness.
In addition, at the position that moisture W concentrates easily, the fore-end of supporting body 4 for example forms the extension 1a of low resistance lead 1,2,2a.Specifically, extend to the low resistance lead 2,1 of the opposition side mode flexing ground with transversal supporting body 4 end of each low resistance lead 1,2.In addition, high resistance lead 3 also imitates low resistance lead 1,2 flexing ground to extend.
Nappe 5 covers the surface of supporting body 4 from above-mentioned loop portion top, insulate from the outside to supporting body 4 and loop portion.Nappe 5 is formed by printer's ink particularly.
Printer's ink is that mixed adhesive, pigment, other filling agent form, as bonding agent, can use polyvinyl chloride resin, polypropylene-based resin, epikote, polyester resin, polypropylene urethane esters resin, polyolefin resin, polyurethane resinoid, phenol resin etc.In addition,, also can use bonding agent, perhaps use the UV hardening resin the combination of the pure and mild isocyanate urethane of polyester polyols as bonding agent.As pigment,, for example use Chinese white for the ease of distinguishing with loop portion.Filling agent contains viscosity modifier, spreading agent etc.By serigraphy, directly intaglio printing etc., above the portion of loop, leaving the mode of guide line 7,8, this printer's ink is coated in the surface of supporting body 4, in view of the above, form nappe 5.This nappe 5 is as dielectric film and waterproof membrane performance function.
On above-mentioned nappe 5, form and to spread all over a plurality of positions, what make that low resistance lead 1,2 exposes exposes hole 6.These expose hole 6 and form simultaneously when printing nappe 5.In illustrated embodiment, along two low resistance leads 1,2 that extend in parallel, the interval setting with regulation at the extension 1a of low resistance lead 1,2, on the 2a, also is provided with one or more respectively.Expose hole 6 and in illustrated embodiment be circular, but also can change to other shape such as ellipse, quadrilateral rightly.In addition, exposing position on the corresponding low resistance lead 1,2 in hole 6, as required, forming area than the 6 big enlarged portion 6a that expose the hole with this.In view of the above, slightly form with staggering, also can make low resistance lead 1,2 be exposed to the outside rightly even expose the position in hole 6.If moisture W adheres in the mode of exposing hole 6 on each low resistance lead 1,2, then electric current is in 1,2 short-circuit flow of low resistance lead.This current value ratio does not have the current value under the situation of short circuit big, in view of the above, detects adhering to of moisture W.
On above-mentioned supporting body 4, form the moisture that runs through its table inner room and pass through hole 9.In illustrated embodiment, at low resistance lead 1,2 each other, extension 1a, 1b are run through respectively each other is arranged to roughly rectangle, but also can be that other shape, the form that is formed etc. with the set by a plurality of apertures runs through setting.In view of the above, even under the situation of moisture W attached to nappe 5 sides, moisture W also passes through hole 9a by moisture, and 9b to exposing hole 6 side inflows, can carry out the detection of moisture W rightly.
Then, the effect to above-mentioned water content detection sensor describes.
Since the loop portion of water content detection sensor and nappe 5 by the different ink print of color on the supporting body 4 that constitutes by transparent membrane, therefore, by visually discern immediately whether loop portion breaks, nappe 5 has or not damage etc., make water content detection sensor whether normal distinguish simplification.
In addition, if guide line 7,8 is connected with the not shown power supply that goes out, voltage is applied to loop portion, and then to pass through high resistance lead 3 from a low resistance lead 1 mobile to another low resistance lead 2 for electric current.By detecting having or not of this electric current etc., can distinguish that normally whether water content detection sensor.
Water content detection sensor exposes mode outside car to expose hole 6 sides, sticks on vehicle body, glass pane of automobile for example etc.Perhaps stick on the diaper.If the power supply of guide line 7,8 and battery etc. is connected, voltage is applied to loop portion, and then to pass through high resistance lead 3 from a low resistance lead 1 mobile to another low resistance lead 2 for electric current.Whether by detecting this electric current, it is normal to differentiate water content detection sensor.
If because rain etc., moisture W adheres in the mode of exposing hole 6 on two low resistance leads 1,2, then electric current is in 1,2 short-circuit flow of low resistance lead.This current value ratio does not have the current value under the situation of short circuit big, in view of the above, detects adhering to of moisture.The control part of automobile passes through the output from the signal of water content detection sensor, is judged as rainfall, makes the wiper starting.If rain stops, water evaporates, then current value reduces once more, and in view of the above, control part stops wiper.In addition, under the situation that is diaper, if the urine of discharging adheres in the mode of exposing hole 6 on two low resistance leads 1,2, then electric current is in 1,2 short-circuit flow of low resistance lead.In view of the above, by alarm etc., know to have or not and urinate etc.
[embodiment 2]
In this embodiment 2, as shown in Figure 5, the high resistance lead 10 of the loop portion of water content detection sensor is compared with the situation of embodiment 1 and is formed shortly.
In addition, the part identical with the part of embodiment 1 used identical symbolic representation, the repetitive description thereof will be omitted.
[embodiment 3]
In this embodiment 3, as shown in Figure 6, the high resistance lead 11 of the loop portion of water content detection sensor is compared with the situation of embodiment 1,2 and is formed shortly, and between an end of two low resistance leads 1,2, linearity ground extends.
In addition, the part identical with the part of embodiment 1,2 used identical symbolic representation, the repetitive description thereof will be omitted.
[embodiment 4]
In the moisture transducer of this embodiment 4, as shown in Figure 7, be provided with the nappe 5 that exposes hole 6 and form as the laminated body of printer's ink layer.Specifically, constitute by three layers printer's ink layers, on the surface of supporting body 4 from the low resistance lead 1 of loop portion, 2 and the anti-solvent inkjet ink layer 5a of top printing first of high resistance lead 3, the face printing is anti-from it urinates black layer 5b, and then face prints the second anti-solvent inkjet ink layer 5c from it.In addition, at printing each layer 5a, 5b during 5c, as non-line portion, forms simultaneously and exposes hole 6.
As anti-solvent inkjet ink, use the China ink of vibrin.In addition, as anti-urine China ink, the urethane that uses the pure and mild isocyanate of polyester polyols is in conjunction with China ink or UV hardening resin China ink.
This moisture transducer is being installed under the situation of diaper; since by the printer's ink layer 5a of multilayer, 5b, the nappe 5 protection low resistance leads 1 that 5c constitutes; 2 and high resistance lead 3; therefore, the anti-urine China ink layer 5b by the centre stops urine to low resistance lead 1; 2 and the infiltration of high resistance lead 3; therefore, prevent the variation of the resistance value of the low resistance lead 1,2 of loop portion and high resistance lead 3.Its result is, can repeatedly correctly detect and urinate, and diaper also can be used for urinating repeatedly.In addition, the composition by the anti-urine China ink of the first anti-solvent inkjet ink layer 5a blocking-up layer solvent that 5b contained etc. is to the infiltration of loop portion, by the infiltration of the second anti-solvent inkjet ink layer 5c blocking-up to an opposite side with loop portion.
In addition, to the part identical with the part of embodiment 1-3, use identical symbolic representation, the repetitive description thereof will be omitted.
[embodiment 5]
In the moisture transducer of embodiment 5, in each form of above-mentioned embodiment 1-4, low resistance lead 1,2 and high resistance lead 3 only contain the electric conductivity ink print of conductive carbon by as conductive material.In view of the above, low resistance lead 1,2 and high resistance lead 3 demonstrate higher patience with respect to the urine composition, have suppressed the change of resistance value.Its result is, according to this moisture transducer, is being used under the situation of diaper, can correctly detect repeatedly and urinate.
Above embodiments of the present invention are illustrated, the present invention is not limited to above-mentioned embodiment, for example, though in the above-described embodiment, will expose the hole and be arranged on the nappe, but also can be arranged on the supporting body.In addition, though nappe is provided with as the printer's ink layer, also can form nappe by the film identical with supporting body.
Claims (11)
1. water content detection sensor, it is characterized in that, the loop portion of containing the low resistance lead of extension arranged side by side and linking the high resistance lead between the end of low resistance lead is sandwiched between the supporting body and nappe that all has water proofing property and insulativity, making the low resistance lead spread all over the hole of exposing of exposing at a plurality of positions is formed on nappe or the supporting body, if flow under the state of loop portion at electric current, attachment of moisture is being exposed between the hole, short circuit between the low resistance lead, then with before the attachment of moisture compare, current value increases, and the position corresponding with exposing the hole of low resistance lead becomes the enlarged portion that has than exposing the big area in hole.
2. water content detection sensor as claimed in claim 1 is characterized in that, low resistance lead and high resistance lead are printed on the supporting body of film like, from it face printing nappe.
3. water content detection sensor as claimed in claim 1 or 2 is characterized in that, forms the extension of low resistance lead and exposes the hole at the fore-end of supporting body.
4. water content detection sensor as claimed in claim 1 or 2 is characterized in that, forms to run through the moisture of showing the inner room and pass through the hole on supporting body and nappe.
5. water content detection sensor as claimed in claim 1 is characterized in that, low resistance lead and high resistance lead are by the electric conductivity ink print that contains conductive carbon.
6. water content detection sensor as claimed in claim 5 is characterized in that, the printer's ink of low resistance lead is compared with the printer's ink of high resistance lead and contained more conductive carbon.
7. water content detection sensor as claimed in claim 1 is characterized in that, is provided with the nappe that exposes the hole or supporting body and forms as the laminated body of printer's ink layer, and the one deck at least in this laminated body is formed by anti-urine China ink.
8. water content detection sensor as claimed in claim 7 is characterized in that, the one deck at least that is between anti-urine China ink layer and low resistance lead and the high resistance lead in the laminated body is formed by anti-solvent inkjet ink.
9. water content detection sensor as claimed in claim 7 is characterized in that, the urethane that anti-urine China ink is the pure and mild isocyanate of polyester polyols is in conjunction with China ink or UV hardening resin China ink.
10. water content detection sensor as claimed in claim 8 is characterized in that, anti-solvent inkjet ink is the vibrin China ink.
11. water content detection sensor as claimed in claim 1 is characterized in that, low resistance lead and high resistance lead are by as conductive material, only contain the electric conductivity ink print of conductive carbon.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP205974/2005 | 2005-07-14 | ||
| JP2005205974 | 2005-07-14 | ||
| JP2006180319A JP5037043B2 (en) | 2005-07-14 | 2006-06-29 | Moisture detection sensor |
| JP180319/2006 | 2006-06-29 | ||
| PCT/JP2006/314052 WO2007007874A1 (en) | 2005-07-14 | 2006-07-14 | Moisture sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101223437A CN101223437A (en) | 2008-07-16 |
| CN101223437B true CN101223437B (en) | 2011-04-13 |
Family
ID=39632410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800256187A Expired - Fee Related CN101223437B (en) | 2005-07-14 | 2006-07-14 | Water content detection sensor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4200184B1 (en) |
| CN (1) | CN101223437B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5037043B2 (en) * | 2005-07-14 | 2012-09-26 | ユニ・チャーム株式会社 | Moisture detection sensor |
| JP6301773B2 (en) * | 2014-07-31 | 2018-03-28 | 花王株式会社 | Wearing article |
| CN105987793A (en) * | 2015-01-28 | 2016-10-05 | 株式会社俞旻St | Highly acidic solution leakage sensing device |
| KR101780708B1 (en) * | 2016-06-07 | 2017-09-21 | 이승용 | Moisture sensing swich and system of the same |
| JP2019220414A (en) * | 2018-06-22 | 2019-12-26 | 本田技研工業株式会社 | Water detection device and power generation cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970122A (en) * | 1987-08-21 | 1990-11-13 | Delco Electronics Corporation | Moisture sensor and method of fabrication thereof |
| US6175310B1 (en) * | 1999-05-10 | 2001-01-16 | Richard J. Gott | Leak detection tape |
| CN1380547A (en) * | 1996-05-07 | 2002-11-20 | 科诺克斯安全工程公司 | Wet dampness detection device for diaper and diaper with said device |
-
2006
- 2006-07-14 CN CN2006800256187A patent/CN101223437B/en not_active Expired - Fee Related
-
2008
- 2008-08-26 JP JP2008216324A patent/JP4200184B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970122A (en) * | 1987-08-21 | 1990-11-13 | Delco Electronics Corporation | Moisture sensor and method of fabrication thereof |
| CN1380547A (en) * | 1996-05-07 | 2002-11-20 | 科诺克斯安全工程公司 | Wet dampness detection device for diaper and diaper with said device |
| US6175310B1 (en) * | 1999-05-10 | 2001-01-16 | Richard J. Gott | Leak detection tape |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008309800A (en) | 2008-12-25 |
| CN101223437A (en) | 2008-07-16 |
| JP4200184B1 (en) | 2008-12-24 |
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