WO2021045044A1 - 液体検知センサ、検知対象物、及び液体検知システム - Google Patents

液体検知センサ、検知対象物、及び液体検知システム Download PDF

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Publication number
WO2021045044A1
WO2021045044A1 PCT/JP2020/033060 JP2020033060W WO2021045044A1 WO 2021045044 A1 WO2021045044 A1 WO 2021045044A1 JP 2020033060 W JP2020033060 W JP 2020033060W WO 2021045044 A1 WO2021045044 A1 WO 2021045044A1
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Prior art keywords
liquid detection
detection sensor
liquid
antenna
wireless communication
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Ceased
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PCT/JP2020/033060
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English (en)
French (fr)
Japanese (ja)
Inventor
浩康 岩田
海里 和▲崎▼
明弘 梅澤
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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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
    • A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Colostomy devices
    • 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

Definitions

  • the technology of the present disclosure relates to a liquid detection sensor, a detection object, and a liquid detection system, and more particularly to a liquid detection sensor for detecting a liquid, a detection object, and a liquid detection system.
  • Non-Patent Documents 1 to 4 there are devices that detect urine using sensor ICs such as temperature sensors, humidity sensors, and wet sensors, and wirelessly notify terminals such as smartphones of excretion. These devices require batteries for sensor drive and wireless communication.
  • the above-mentioned device needs to be collected after use, which increases the work load compared to the case where the device is not used.
  • problems such as hygiene when it is reused.
  • problems that it is not comfortable to wear due to being a large device and that it is expensive.
  • the technology of the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a liquid detection sensor that can be compact and have a low cost configuration.
  • Another object of the present invention is to provide a detection object and a liquid detection system using a liquid detection sensor having a small and low cost configuration.
  • the first aspect of the present disclosure is a liquid detection sensor, which is a sheet substrate formed of a material that deforms in response to a liquid, an antenna formed on the sheet substrate, and connected to the antenna. Moreover, it is configured to include a communication circuit that performs wireless communication via the antenna.
  • the second aspect of the present disclosure is a detection target, which includes the above-mentioned liquid detection sensor, and the liquid detection sensor is a liquid detection target mounted on the surface or inside.
  • a third aspect of the present disclosure is a liquid detection system, which is a liquid detection system for detecting a liquid in a detection target, and is attached to the detection target with the liquid detection sensor and the liquid. It is configured to include a communication device that performs wireless communication with the communication circuit of the detection sensor.
  • the effect that a compact and low-cost configuration can be obtained can be obtained.
  • the liquid detection sensor has an antenna for wireless communication using a UHF band (RFID), and has a sheet having a structure that collapses when it reacts with water (urine / feces) as a substrate. It is a thin film device. When moisture touches this sheet, the sheet collapses and the antenna is disconnected, resulting in interruption of communication. By detecting this communication blackout, excrement can be detected remotely.
  • RFID UHF band
  • the liquid detection sensor uses wireless communication, a notification can be sent even if the person is away from the wearer, and the detection of excrement can be noticed. Further, since the liquid detection sensor does not have a battery, it does not need to be collected for reuse. In addition, the price can be kept down, leading to miniaturization.
  • the liquid detection sensor compact, there is no sense of discomfort even when wearing a diaper with a built-in liquid detection sensor. Further, by making the liquid detection sensor easily attached to the diaper, it is possible to suppress an increase in the burden of the attachment work.
  • the liquid detection sensor can be configured at a low price, and is cheaper than the product using the above-mentioned conventional technology, so that it is easy to introduce. Further, by making the liquid detection sensor disposable, it is not necessary to collect the liquid, so that it is possible to suppress an increase in the work load.
  • the caregiver does not have to check the inside of the diaper every few hours, reducing the burden of excretion care.
  • the care recipient will not be able to see inside the diaper even though he is not excreting.
  • by promptly changing the diaper after excretion discomfort and skin irritation caused by excrement can be eliminated.
  • the liquid detection system 100 includes a liquid detection sensor 10, a wireless communication device 50, and an information processing device 70.
  • the liquid detection sensor 10 and the wireless communication device 50 are wirelessly (for example, UHF band) connected.
  • the wireless communication device 50 and the information processing device 70 are connected to each other via a network N such as LAN (Local Area Network), Wi-Fi, Bluetooth (registered trademark), or the Internet.
  • LAN Local Area Network
  • Wi-Fi Wireless Fidelity
  • Bluetooth registered trademark
  • the liquid detection sensor 10 is mounted inside the diaper 20.
  • the wireless communication device 50 is installed on the back side of the bed 30 and performs wireless communication with the liquid detection sensor 10 attached to the diaper 20 worn by a person lying on the bed 30.
  • the liquid detection sensor 10 is connected to a sheet substrate 12 formed of a material that deforms in response to a liquid, an antenna 14 formed on the sheet substrate 12, and an antenna 14. Moreover, it is provided with a communication circuit 16 that performs wireless communication via the antenna 14.
  • the antenna 14 and the communication circuit 16 on the sheet substrate 12 are covered by the coating layer 12A.
  • the deformation is a concept including collapse, large deformation, and plastic deformation.
  • the material of the sheet substrate 12 is a material that deforms in response to a liquid, and is, for example, any one of oblate, SBS-based material, and PVA-based material, or a combination of two or more of these. Further, the coating layer 12A of the sheet substrate 12 is also formed of a material that deforms in response to a liquid. However, the coating layer 12A may not be provided.
  • the antenna 14 is formed on the seat substrate 12 so that the function of radiating radio waves into the air is impaired according to the deformation of the seat substrate 12.
  • the shape of the antenna 14 is, for example, a rectangle.
  • the antenna 14 is formed of conductive ink, and the antenna 14 is formed on the sheet substrate 12 by printing using the conductive ink.
  • the communication circuit 16 is configured as an IC tag, for example, and is installed on the sheet substrate 12.
  • the sheet substrate 12 and the coating layer 12A are formed of oblate, when they react with the liquid, the sheet substrate 12 and the coating layer 12A shrink as shown in FIG. 3B, and the sheet substrate 12 and the coating layer 12A Along with the shrinkage, the conductive ink antenna 14 on the sheet substrate 12 also shrinks. As a result, the apparent area of the antenna 14 becomes smaller (lower figure of FIG. 3B), the performance (communication distance) of the antenna 14 decreases, and the radio wave intensity received by the wireless communication device 50 decreases. Alternatively, when the sheet substrate 12 and the coating layer 12A react with the liquid, as shown in FIG.
  • the sheet substrate 12 and the coating layer 12A are melted and broken, and the sheet substrate 12 and the coating layer 12A are broken in accordance with the breakage.
  • the conductive ink antenna 14 on the sheet substrate 12 is also broken (lower figure of FIG. 3C). As a result, the antenna 14 is disconnected and communication becomes impossible, and the wireless communication device 50 detects the communication interruption.
  • the liquid detection sensor 10 may include two support layers 12B and 12C that support the sheet substrate 12.
  • the sheet substrate 12 is formed of a material having a property of shrinking, and is formed of, for example, SBS (styrene-butadiene-styrene block copolymer).
  • the support layer 12B that directly supports the sheet substrate 12 is formed of a water-soluble material, for example, PVA (polyvinyl alcohol). Since PVA is water-soluble, it disappears when exposed to water. However, if the support layer 12B is sufficiently thick and the shape of the sheet substrate 12 is sufficiently maintained, the support layer 12C may not be provided.
  • PVA polyvinyl alcohol
  • the support layer 12C supported via the support layer 12B is formed of a material for maintaining the shape of the sheet substrate 12, for example, PET (polyethylene terephthalate).
  • the sheet substrate 12, the support layers 12B, and 12C are laminated and processed so as to make a hole. Since the holes are formed in each of the sheet substrate 12, the support layer 12B, and 12C, the liquid can easily come into contact with the support layer 12B, and the support layer 12B dissolves quickly, so that the accuracy of detecting the liquid is improved.
  • the wireless communication device 50 includes a reading unit 52 and a communication unit 54.
  • the reading unit 52 communicates with the communication circuit 16 of the liquid detection sensor 10 by wireless communication (for example, UHF band) in response to a command from the information processing device 70, and the communication result (whether the communication is successful). Communication interruption or radio wave strength) is transmitted to the information processing device 70 via the communication unit 54.
  • wireless communication for example, UHF band
  • the communication unit 54 transmits / receives data to / from the information processing device 70 via the network N.
  • Power is supplied to the wireless communication device 50 from, for example, a power supply unit 51 including a battery.
  • the power supply unit 51 is installed on the back side of the bed 30, for example.
  • the information processing device 70 is composed of a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a display, and the like (not shown).
  • the liquid detection processing program is stored in the ROM.
  • the liquid detection processing program is read from the ROM, expanded in the RAM, executed by the CPU, and the liquid detection processing is executed.
  • the information processing device 70 includes a communication unit 72, a control unit 74, and a display unit 76.
  • the communication unit 72 transmits / receives data to / from the wireless communication device 50 via the network N.
  • the control unit 74 transmits a command for wireless communication with the communication circuit of the liquid detection sensor 10 to the wireless communication device 50 via the communication unit 72 at predetermined intervals, and transmits the command via the communication unit 72. Acquires the communication result received from the wireless communication device 50.
  • the control unit 74 indicates that the acquired communication result indicates that the wireless communication with the communication circuit 16 of the liquid detection sensor 10 has been interrupted, or the acquired communication result is with the communication circuit 16 of the liquid detection sensor 10. It is determined that the excrement in the diaper 20 has been detected when it indicates that the radio wave intensity in the wireless communication between the two has dropped below the threshold value.
  • the control unit 74 causes the display unit 76 to display a message indicating that the excrement as a liquid has been detected.
  • the caregiver attaches the liquid detection sensor 10 inside the diaper 20 as shown in FIGS. 5 and 6.
  • a pocket 20A is formed in the diaper 20 for inserting the liquid detection sensor 10, and the liquid detection sensor 10 is inserted into the pocket 20A to attach the liquid detection sensor 10 inside the diaper 20.
  • the care recipient puts on the diaper 20 to which the liquid detection sensor 10 is attached.
  • the information processing device 70 executes the liquid detection process in response to the operation of the operator.
  • control unit 74 transmits a command for wireless communication with the communication circuit of the liquid detection sensor 10 to the wireless communication device 50 via the communication unit 72 at predetermined intervals.
  • the communication result received from the wireless communication device 50 is acquired via the communication unit 72.
  • the sheet substrate 12 and the coating layer 12A of the liquid detection sensor 10 contract in response to the excrement, resulting in the contraction of the sheet substrate 12 and the coating layer 12A.
  • the conductive ink antenna 14 on the sheet substrate 12 also contracts.
  • the apparent area of the antenna 14 is reduced, and the radio wave intensity is lowered.
  • the sheet substrate 12 and the coating layer 12A of the liquid detection sensor 10 are melted and broken in response to excrement, and are made of conductive ink on the sheet substrate 12 in accordance with the breaking of the sheet substrate 12 and the coating layer 12A.
  • the antenna 14 is also broken, and the antenna 14 is disconnected, making communication impossible.
  • the reading unit 52 of the wireless communication device 50 communicates with the communication circuit 16 of the liquid detection sensor 10 by wireless communication in response to a command from the information processing device 70, and a communication result indicating that the communication is interrupted. Is transmitted to the information processing device 70 via the communication unit 54.
  • the control unit 74 of the information processing device 70 indicates that the acquired communication result indicates that the wireless communication with the communication circuit 16 of the liquid detection sensor 10 has been interrupted, or the acquired communication result is the liquid detection sensor 10. When it indicates that the radio wave intensity in the wireless communication with the communication circuit 16 has dropped below the threshold value, it is determined that the excrement in the diaper 20 has been detected.
  • the control unit 74 causes the display unit 76 to display a message indicating that the excrement as a liquid has been detected.
  • the caregiver can confirm the message displayed on the display unit 76, know that the care recipient has excreted excrement in the diaper 20, and can immediately change the diaper 20. At this time, the used diaper 20 is discarded with the liquid detection sensor 10 attached.
  • an antenna made of conductive ink and a communication circuit which is an IC tag are mounted on the sheet substrate of the liquid detection sensor.
  • the sheet substrate physically collapses, which causes the antenna to contract or break. In this way, it is possible to know that the liquid detection sensor has reacted with the liquid by using the liquid detection sensor having a small and low cost configuration.
  • a pocket for inserting the liquid detection sensor is provided in the diaper, and the liquid detection sensor is inserted into the diaper for use. After using the diaper, it does not need to be collected and is thrown away as it is, so an increase in work load can be suppressed.
  • the wireless communication device installed on the bed performs wireless communication with the liquid detection sensor attached to the diaper, and the information processing device 70 is remotely notified of the communication result, thereby causing the inside of the diaper to be notified. You can remotely check the internal condition of the diaper (presence or absence of excrement) without checking.
  • the liquid detection sensor can be easily attached to the existing diaper.
  • a liquid detection may be performed by using an energization type sensor that energizes in response to a liquid.
  • the information processing apparatus 70 may predict excretion by AI (artificial intelligence) using the data of the excretion interval obtained by collecting the detection result of detecting the excrement.
  • AI artificial intelligence
  • the sheet substrate is formed by using a combination of oblate, SBS, PVA, and PET as a material that deforms in response to a liquid
  • SBS polystyrene isoprene styrene, polydimethylsiloxane, silicone, polystyrene, polymethacrylic acid, polylactic acid, polylactic acid glycolic acid copolymer, polyvinyl acetate, chitosan, alginic acid, cellulose acetate, hyaluronic acid, gelatin
  • collagen may be used.
  • PVA sodium alginate or PNIPAM (poly (N-isopropylacrylamide)
  • PET polypropylene
  • PPE polyphenylene ether
  • COP cycloolefin
  • PI polyimide
  • aluminum foil conductive polymer film, paper, polysaccharide film, silicone resin, silicon wafer, glass Etc.
  • UHF band is used in the wireless communication between the liquid detection sensor and the wireless communication device
  • NFC Near field communication
  • Wi-Fi Wireless Fidelity
  • Bluetooth registered trademark
  • UHF band, NFC (Near field communication), Wi-Fi, and Bluetooth may be used in combination of at least two or more.
  • the diaper may be provided with only a notch for inserting the liquid detection sensor, and the liquid detection sensor may be inserted into the diaper through the notch. Further, the liquid detection sensor may be attached to the surface of the diaper. Further, the liquid detection sensor may be fixed by placing the liquid detection sensor on the surface of the diaper and covering it with a urine absorbing pad or the like.
  • the wireless communication device may be provided near the bed.
  • a wireless communication device may be provided at the entrance / exit of the room to detect the entry / exit of the room of the care recipient wearing a diaper equipped with a liquid detection sensor to prevent wandering.
  • a wireless communication device may be provided on a shelf for storing diapers, and the number of diapers to which a liquid detection sensor is attached may be detected to manage the inventory of diapers.
  • the liquid detection system may be used for use in situations where liquid detection is required (application to buildings, robots, etc.).
  • the liquid detection sensor may be attached not only to the care recipient but also to the diaper of an infant.
  • a liquid detection system may be used in situations where rain detection is required.
  • a liquid detection system may be used for detecting heat stroke.
  • a liquid detection sensor may be attached to the pet toilet.

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  • Health & Medical Sciences (AREA)
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PCT/JP2020/033060 2019-09-02 2020-09-01 液体検知センサ、検知対象物、及び液体検知システム Ceased WO2021045044A1 (ja)

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JP2019159421A JP7313675B2 (ja) 2019-09-02 2019-09-02 液体検知センサ、検知対象物、及び液体検知システム
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114186658A (zh) * 2022-01-11 2022-03-15 深圳中安科研技术有限公司 一种温湿度位移测量电子标签
SE2051510A1 (en) * 2020-12-21 2022-06-22 Digital Tags Finland Oy Liquid detection rfid tag arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7777468B2 (ja) 2022-02-24 2025-11-28 メクテック株式会社 オムツ用センサ、紙オムツ、及び、紙オムツキット
CN114720501B (zh) * 2022-04-08 2025-03-18 中南大学 一种用于检测酒精浓度的方法及其材料

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017150889A (ja) * 2016-02-23 2017-08-31 国立大学法人山形大学 おむつ用液体検知センサおよび液体検知装置
JP2017207503A (ja) * 2011-08-11 2017-11-24 スリーエム イノベイティブ プロパティズ カンパニー 脆弱連結部を備えた無線周波数回路を使用する湿潤度センサー
JP2019015589A (ja) * 2017-07-06 2019-01-31 トッパン・フォームズ株式会社 水分検知シート

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017207503A (ja) * 2011-08-11 2017-11-24 スリーエム イノベイティブ プロパティズ カンパニー 脆弱連結部を備えた無線周波数回路を使用する湿潤度センサー
JP2017150889A (ja) * 2016-02-23 2017-08-31 国立大学法人山形大学 おむつ用液体検知センサおよび液体検知装置
JP2019015589A (ja) * 2017-07-06 2019-01-31 トッパン・フォームズ株式会社 水分検知シート

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2051510A1 (en) * 2020-12-21 2022-06-22 Digital Tags Finland Oy Liquid detection rfid tag arrangement
CN114186658A (zh) * 2022-01-11 2022-03-15 深圳中安科研技术有限公司 一种温湿度位移测量电子标签

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