WO2022196765A1 - 排尿検出装置 - Google Patents
排尿検出装置 Download PDFInfo
- Publication number
- WO2022196765A1 WO2022196765A1 PCT/JP2022/012293 JP2022012293W WO2022196765A1 WO 2022196765 A1 WO2022196765 A1 WO 2022196765A1 JP 2022012293 W JP2022012293 W JP 2022012293W WO 2022196765 A1 WO2022196765 A1 WO 2022196765A1
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- WO
- WIPO (PCT)
- Prior art keywords
- urination
- humidity
- temperature
- diaper
- detection device
- Prior art date
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Classifications
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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
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Definitions
- the present invention relates to a urination detection device.
- a technique for the purpose of reducing nursing care burden, etc., a technique is known in which urination of a wearer of a disposable diaper is detected by an urination sensor and notified.
- a method of detecting urination a method of detecting temperature or humidity raised by urination is known.
- a technique is known in which a humidity sensor is placed outside a diaper and urination is detected based on changes in humidity (see Patent Document 1).
- the present invention relates to a urination detection device having a body device that incorporates a humidity sensor and is attached to the outer surface of a diaper.
- the urination detection device records changes in the humidity of the outer surface of the diaper in the main device or in an auxiliary device that can communicate with the main device, and the second and subsequent urinations are made based on the humidity changes. It is preferable to include a urination determination unit capable of detecting the .
- the present invention also relates to a urination detection method.
- the urination detection method measures the humidity and temperature of the outer surface of the diaper at the urination portion of the diaper, and determines that urination has occurred when both the rate of increase in the humidity and the temperature exceed their respective set values. .
- FIG. 1A and 1B are diagrams showing a body device of a urine detection device according to an embodiment of the present invention, in which (a) is a cross-sectional view taken along the line II of (b), (b) is a plan view, and (c) is a It is a bottom view.
- FIG. 2 is a perspective view showing a pants-type disposable diaper, which is an example of a diaper to which the main unit is attached.
- FIG. 3 is a schematic cross-sectional view showing the main unit attached to the outer surface of the diaper and its vicinity.
- FIG. 4 is an explanatory diagram of a measuring device used in a measurement test for examining changes in humidity and temperature on the outer surface of a diaper due to urination.
- FIG. 1A and 1B are diagrams showing a body device of a urine detection device according to an embodiment of the present invention, in which (a) is a cross-sectional view taken along the line II of (b), (b) is a plan view, and (c) is
- FIG. 5 is a graph showing changes in temperature and humidity of the outer surface of the diaper when 40 mL of artificial urine was supplied to the diaper multiple times.
- FIG. 6 is a graph detailing changes in temperature and humidity before and after the third injection shown in FIG.
- FIG. 7 shows the amount of change per minute obtained by dividing the difference between the value at the time of the previous data acquisition and the value at the time of the next data acquisition for each of the temperature, data, and humidity data by the acquisition interval.
- FIG. 8 is a block diagram of the urination determination section in one embodiment of the present invention.
- FIG. 9 is a schematic diagram showing another example of the inner wall body or the outer cover provided with a vent.
- Patent Documents 2 and 3 describe a method of detecting excretion by arranging a temperature sensor and a humidity sensor on the skin facing side of a disposable diaper.
- Patent Document 3 describes a method for determining the type of excrement by combining a temperature sensor and a humidity sensor.
- the sensor comes into direct contact with the excrement, so cleaning is required to reuse the sensor, which poses a sanitary problem.
- the present invention relates to a urination detection device that can solve the problems of the prior art described above.
- a urine detection device 1 which is an embodiment of the present invention, includes a main device 2 attached to an outer surface S1 of a diaper, as shown in FIG.
- Diaper 10 is preferably a disposable diaper.
- the diaper 10 shown in FIG. 2 is a disposable diaper, comprising a liquid-permeable surface sheet 12, a liquid-impermeable or water-repellent leak-proof sheet 13, and a liquid-retaining absorber disposed between the sheets 12 and 13. 14.
- an exterior sheet 15 made of nonwoven fabric having a single-layer or multi-layer structure is further arranged.
- the diaper 10 has an abdominal portion A arranged on the abdomen side of the wearer when worn, a dorsal portion B arranged on the back side, and a crotch portion C positioned therebetween.
- the diaper 10 is a pants-type diaper, and both side edges of the abdomen side part A and both side edges of the back side part B are joined to each other, thereby forming a pair of side seal parts 16, 16 and a waist opening.
- a portion 17 and a pair of leg openings 18, 18 are formed.
- the surface sheet 12, the anti-leakage sheet 13, and the absorbent body 14 various materials conventionally used for this type of article can be used without particular limitation.
- various non-woven fabrics, perforated films, etc. can be used as the surface sheet 12, and resin films, laminated sheets of resin films and non-woven fabrics, etc. can be used as the leak-proof sheet 13.
- an absorbent core composed of superabsorbent polymer particles and fiber material covered with a core wrap sheet can be used. It is preferable to use a moisture-permeable sheet for the leak-proof sheet 13 .
- the main body device 2 is a device that is attached to the outer surface S1 of the diaper and used.
- the inner surface of the diaper is the surface facing the wearer's skin when the diaper is worn, and the outer surface of the diaper is the surface facing away from the wearer's skin when the diaper is worn. It is preferable that the main unit 2 is attached to the outer surface of the diaper at the urination site from the viewpoint of accurately obtaining information on the humidity change due to urination.
- the urinating portion of the diaper is the portion in which the absorber 14 exists.
- the main unit 2 is preferably attached to a portion of the crotch portion C in which the absorber 14 is located, and is preferably attached to the central portion of the crotch portion C in the width direction.
- the crotch portion C is a region located between the left and right leg openings. is divided into 5 equal parts, and the central 3 areas are obtained.
- the urination detection device 1 of this embodiment incorporates a temperature sensor 3 and a humidity sensor 4 in a main body device 2.
- a urination determination unit 5 is provided in the main unit 2 .
- the main unit 2 has a storage body 7 in which at least the humidity sensor 4 is arranged. 10 and an outer cover 72 covering the side opposite to the side to be brought into contact with the outer surface S1.
- the diaper outer surface S1 is also referred to as the diaper outer surface S1
- the diaper inner surface S2 is also referred to as the diaper inner surface S2.
- the temperature sensor 3 , the humidity sensor 4 , and the urination determination unit 5 are arranged in a space 74 within the container 7 surrounded by the inner wall body 71 and the outer cover 72 .
- a thermocouple, a thermistor, or the like is preferably used as the temperature sensor 3 .
- the humidity sensor 4 various known sensors can be used. For example, a polymer resistance type or polymer capacitance type humidity sensor can be used. Commercial products can also be used, for example, "Humidity sensor CHS type" manufactured by TDK can also be used.
- the space 74 in the container 7 in which the humidity sensor 4 is arranged is also referred to as the measurement space 74 .
- the inner wall body 71 is formed with a vent portion 75 formed of a through hole
- the outer cover 72 is also formed with a vent portion 76 formed of a through hole.
- the ventilation part 75 formed in the inner wall body 71 is formed on a surface facing the outer surface of the diaper, and functions as a moisture introduction part that introduces moisture discharged from the outer surface S1 of the diaper into the measurement space 74.
- the ventilation part 76 formed in the outer cover 72 is formed in a part other than the surface facing the outer surface of the diaper, and functions as a moisture discharging part for discharging moisture to the outside after coming into contact with the humidity sensor 4. do. As shown in FIG.
- the body device 2 of the urine detection device 1 of the present embodiment when the body device 2 of the urine detection device 1 of the present embodiment is attached to the outer surface of the diaper, when urine is urinated on the diaper, it passes through the moisture-permeable leak-proof sheet 13 and is detected on the outer surface S1. is introduced into the measurement space 74 through the ventilation section 75 functioning as a moisture introduction section, and the humidity in the measurement space 74 increases. After urination, the moisture that caused the increase in humidity is discharged from the ventilation section 76 functioning as a moisture discharge section, and the humidity in the measurement space 74 decreases relatively quickly.
- the humidity sensor 4 by measuring the humidity in the measurement space 74 with the humidity sensor 4, it is possible to accurately measure the humidity change that occurs on the outer surface of the diaper due to urination. It is possible to detect urination after the first time with high accuracy.
- the measurement of the humidity of the outer surface of the diaper may be the measurement of the humidity within the measurement space 74 that captures the moisture emitted from the outer surface of the diaper.
- the humidity measured by the humidity sensor 4 may be relative humidity or absolute humidity, but is preferably relative humidity. As the temperature drops, the amount of saturated water vapor in the measurement space 74 drops, so the relative humidity rises.
- the ventilation section (humidity discharge section) 76 exists, the increased humidity after urination is discharged from the humidity discharge section 76, thereby making it easier for the relative humidity to decrease as the temperature in the measurement space 74 decreases. Efficiently lowering the temperature and humidity in the measurement space 74 makes it easier to detect increased humidity after the second and subsequent urinations.
- FIG. 4 is an explanatory diagram of a measuring device used in a measurement test for examining changes in humidity and temperature on the outer surface of a diaper due to urination.
- 4 is a graph showing changes in temperature and humidity on the outer surface of the diaper when the diaper is supplied repeatedly.
- the graph shown in FIG. 5 plots the temperature and humidity of the outer surface of the diaper 10 in which the side seal portions are peeled off and the diaper 10 is spread flat and fixed. It was obtained by supplying artificial urine to the inner surface of the diaper three times at an interval of one hour while monitoring with a temperature sensor and a humidity sensor.
- the diaper 10 spread out in a plane was fixed around the absorbent part in which the absorbent body 14 was arranged to a hanging frame-like support part of the support body 82 made of acrylic.
- a hot water tank 83 was placed above the support 82 to maintain the temperature of the inner surface of the diaper at about 36° C., which is assumed to be the skin temperature.
- Physiological saline was used as the artificial urine, and the artificial urine was kept at 36° C. and fed over about 10 seconds by the liquid feed pump 84 each time.
- FIG. 6 is a graph showing details of changes in temperature and humidity after injection during the third injection shown in FIG.
- the temperature and humidity both increased sharply about 1 minute after the third injection (4:05) and reached a peak. After reaching the peak out within 3 minutes from the injection time point.
- changes in temperature and humidity during the second injection are similar to those during the third injection.
- the change in humidity after the second urination was extremely small compared to the change at the time of the first urination, and it was difficult to detect urination based on that change.
- a ventilation part 75 is provided on the surface facing the outer surface of the diaper, and other ventilation parts 76 are provided on other parts, and are arranged on the outer surface side of the diaper.
- the first criterion based on humidity and Preferably, it is determined that urination has occurred when a second temperature-based criterion is simultaneously met.
- "Simultaneously" means that the humidity change satisfying the first criterion and the temperature change satisfying the second criterion occurred within two minutes.
- the first determination criterion is, for example, whether or not the rate of temperature rise exceeds a set value, and it is determined that the first determination criterion is satisfied when the set value is exceeded.
- the second criterion is, for example, whether or not the rate of increase in humidity exceeds a set value, and it is determined that the second criterion is satisfied when the set value is exceeded.
- the urination determination unit 5 in the first embodiment records changes in the temperature and humidity of the outer surface of the diaper. It has a function of judging that urination has occurred when a second judgment criterion that the rate of rise of the urinary tract exceeds a set value is satisfied at the same time.
- the urination determination unit 5 includes a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory) and a RAM (Random Access Memory), a timer, and the like.
- the urination determination unit 5 is electrically connected to the temperature sensor 3 and the humidity sensor 4, and the processing performed by the urination determination unit 5 is performed by, for example, the CPU developing a program stored in ROM or RAM into RAM.
- the urination determination unit 5 functionally includes a sampling time generation unit 51, a temperature data sampling unit 52, a temperature data holding memory 53, a temperature change detection unit 54, a humidity A data sampling section 62 for data, a humidity data holding memory 63, a humidity change detection section 64, a change detection setting memory 55, and an urination detection section 56 are provided.
- the sampling time generating unit 51 instructs the temperature data sampling unit 52 to measure the temperature by the temperature sensor 3 or to determine the temperature measured by the temperature sensor 3. It outputs a timing signal related to the timing of acquiring temperature data used for detection processing.
- the data sampling unit 52 to which the timing signal is input stores the temperature and time data at the time when the timing signal is input in the temperature data holding memory 53 .
- the sampling time generation unit 51 also supplies the humidity data sampling unit 62 with the timing of measuring the humidity by the humidity sensor 4 or from the humidity measured by the humidity sensor 4 based on the data acquisition interval information stored in the storage device. It outputs a timing signal relating to the timing of acquiring humidity data used for urination detection processing.
- the humidity data sampling unit 62 to which the timing signal is input stores the humidity and time data at the time when the timing signal is input in the humidity data holding memory 63 .
- the data acquisition interval information may be common or separate for temperature and humidity.
- the temperature change detection unit 54 uses the past temperature and time data stored in the temperature data holding memory 53 and the temperature and time information newly acquired by the data sampling unit 52 to detect temperature change per predetermined time as an index indicating temperature change.
- the humidity change detection unit 64 uses the past humidity and time data stored in the humidity data holding memory 63 or the humidity and time information newly acquired by the humidity data sampling unit 62 as an index indicating the humidity change, A humidity change amount per predetermined time is calculated.
- the urination detection unit 56 compares the amount of humidity change per predetermined time calculated by the humidity change detection unit 64 with the urination determination criteria for humidity stored in the change detection setting memory 55 .
- This urination criterion is whether or not the amount of change in humidity per predetermined time corresponds to a humidity increase in which the rate of increase exceeds a predetermined value. is determined to be satisfied, and if not exceeded, it is determined that the first criterion is not satisfied.
- the urination detection unit 56 also compares the amount of temperature change per predetermined time calculated by the temperature change detection unit 54 with the urination determination criteria for temperature stored in the change detection setting memory 55 .
- This urination criterion is whether or not the amount of temperature change per predetermined time corresponds to a temperature increase in which the rate of increase exceeds a predetermined value. is determined to be satisfied, and if not exceeded, it is determined that the second criterion is not satisfied.
- the urination detection unit 56 performs the first determination as to whether the above-described first determination criteria are satisfied and the second determination as to whether or not the second determination criteria are satisfied in an arbitrary order or simultaneously. and if both the first criterion and the second criterion are met, it is determined that urination has occurred.
- the urination determination unit 5 in this embodiment includes urination display means 58 .
- a urination detection frequency memory 57 is provided so that the number of urinations can be stored or displayed.
- the urination detection unit 56 causes the urination display means 58 to display the urination detection information, and displays the urination count information stored in the urination detection count memory 57 as the number of urination once. Make an incrementing update.
- the urination detection information to be displayed on the urination display means 58 may be one in which the occurrence of urination is displayed on a screen made up of a liquid crystal or the like using characters, symbols, colors, or the like, or may be indicated by sound, voice, vibration, or the like. can be anything.
- As the urination detection information it is preferable to express the number of times of urination in addition to the fact that urination has occurred.
- the urination determination unit 5 can determine that the first determination criterion is satisfied when the rate of increase in relative humidity is 3% or more per minute, that is, when the relative humidity is 3%/minute or more. preferable.
- the rate of increase in humidity used as the first criterion for determining that urination has occurred is preferably 3% or more in relative humidity per minute, and 4% or more and 50% or less. and more preferably 5% or more and 50% or less. "%" in the relative humidity increase rate means a percentage point, and if the relative humidity changes from 50% to 55% in 1 minute, the increase rate is 5%/1 minute.
- the urination determination unit 5 can use the rate of increase in absolute humidity instead of the rate of increase in relative humidity as an index. It is preferable to determine that the first criterion is satisfied when the rate of increase in absolute humidity is 1.5 g/m 3 or more per minute, that is, absolute humidity (1.5 g/m 3 )/minute or more.
- the rate of increase in absolute humidity is 1.5 g/m 3 or more per minute, that is, absolute humidity (1.5 g/m 3 )/minute or more.
- the rate of increase in humidity used as the first criterion for determining that urination has occurred is preferably an increase in absolute humidity of 1.5 g/m 3 or more per minute. It is more preferably 0 g/m 3 or more and 25 g/m 3 or less, and even more preferably 2.5 g/m 3 or more and 25 g/m 3 or less.
- the urination determination unit 5 determines that the second determination criterion is satisfied when the rate of temperature increase is 0.2° C. per minute or more, that is, 0.2° C./minute or more. is preferred.
- the temperature rise rate used as the second criterion for determining that urination has occurred is preferably 0.2° C./minute or more, more preferably 0.25° C./minute or more. It is preferably 0.25° C./1 minute or more and 5° C./1 minute or less, more preferably.
- the diaper When the diaper has already absorbed urine, the already absorbed urine increases the relative humidity of the outer surface of the diaper, which may be maintained at a high level. In such cases, it may be difficult to determine the second and subsequent urinations based on the relative humidity. At this time, since urine is excreted from the inside of the body, it is excreted at the same temperature as the body temperature, and since the temperature and humidity rise at the same time, it is difficult to see the change in the relative humidity. Since the absolute humidity on the outer surface of the diaper has increased more than the increase in the relative humidity, the rate of increase in the absolute humidity can also be used for determination.
- Table 1 shows the rate of temperature rise during the first to third urinations in the graph shown in FIG.
- the rate of temperature rise was the fastest at the first time, and decreased as the number of urinations increased. The reason for this is that as the number of times of urination increases, the transfer of temperature to the outer surface of the diaper becomes slower.
- the second criteria for detecting the second and subsequent urinations is whether or not the rate of temperature rise falls within a predetermined range.
- the rate of temperature rise during the second and third urination shown in Table 1 is 0.64°C/min and 0.27°C/min.
- the first criterion is a relative humidity of 75%. Relative humidity is suitable for using a uniform value as a reference. In terms of absolute humidity, when the temperature changes, the reference value for judging that the humidity is high changes depending on the temperature. On the other hand, when the second and subsequent urinations, such as the second and third urinations, are to be detected based on the rising speed of the humidity, it is possible to detect the humidity more accurately if the absolute humidity is used as the first criterion. Therefore, it is preferable.
- the urination detecting device of the present invention as a configuration of the urination determination unit or an additional configuration, changes the diaper when the relative humidity is equal to or higher than a predetermined value and the rate of temperature rise is equal to or lower than a predetermined value.
- Prompting warning means are preferably provided.
- the warning means prompting diaper change is, for example, a warning prompting diaper change when the relative humidity is 75% or more and the temperature rise is 0.2° C./1 minute or more and 1° C./1 minute or less. preferably emitted.
- Conditions for issuing a warning may be a relative humidity of 75% or more and a temperature rise of 0.2° C./1 minute or more and 0.5° C./1 minute or less.
- the above-described urination display means 58 can serve as a warning means for prompting diaper change by displaying the number of times of urination or by adding content that prompts diaper change.
- the warning to prompt the diaper change is not limited to the content directly prompting the diaper change, but may be a message that only indicates the number of times of urination or the total amount of urine absorbed.
- the warning prompting the user to change the diaper may be displayed on the screen using characters, symbols, colors, or the like, or may be notified by sound, voice, vibration, or the like.
- the humidity data acquisition interval used to determine the rate of increase in humidity is preferably 2 minutes or less, more preferably 1 minute or less, and preferably 1 second or more, more preferably 10 seconds or more, and also preferably is 1 second or more and 2 minutes or less, more preferably 1 second or more and 1 minute or less, and still more preferably 10 seconds or more and 1 minute or less.
- the temperature data acquisition interval used to determine the rate of temperature rise is preferably 2 minutes or less, more preferably 1 minute or less, and is preferably 1 second or more, more preferably 10 seconds or more, and is also preferably is 1 second or more and 2 minutes or less, more preferably 1 second or more and 1 minute or less, and still more preferably 10 seconds or more and 1 minute or less.
- the humidity data acquisition interval and the temperature data acquisition interval may be the same or different.
- FIG. 7 shows the value obtained by dividing the difference between the value at the time of the previous data acquisition and the value at the time of the next data acquisition by the acquisition interval with an acquisition interval of 10 seconds for both the temperature data and the humidity data. is a graph shown as a change in (RH% or °C).
- the above-mentioned data acquisition interval is preferably the interval between the time points at which the two temperature or humidity values used to determine the rate of increase in temperature or humidity are observed, and when the temperature or humidity is continuously monitored
- the interval between the two points in time may be used.
- FIG. 7 shows a set value used to determine whether the first criterion is satisfied and a set value used to determine whether the second criterion is satisfied. The orientations are shown aligned.
- Both set values are set to values that exceed the observed fluctuations in the baseline during non-urination, and when the rates of rise in temperature and humidity both exceed the set values, the urination detector 56 detects that urination has occurred. By detecting, not only the first urination but also the second urination shown on the right side of FIG. 7 can be detected with high accuracy without erroneous detection.
- the urination detection device 1 of the present embodiment includes a sampling time generation unit 51, temperature and humidity data sampling units 52 and 62, a temperature data holding memory 53, a temperature data holding memory 53, and a sampling time generation unit 51, which constitute the urination determination unit 5 described above, in the main unit 2.
- a humidity data holding memory 63, a temperature change detection section 54, a humidity change detection section 64, and an urination detection section 56 are provided. I have.
- a sampling time generation unit By providing a sampling time generation unit, a data sampling unit, a data retention memory, a change detection unit for one or both of temperature and humidity, an urination detection unit, and a power supply unit in the main unit 2 attached to the outer surface of the diaper, for example
- a power supply cord connecting the main unit 2 and the power supply unit is no longer required, and the behavior of the wearer wearing the diaper to which the main unit 2 is attached is less likely to be restricted.
- urination-related data can be obtained under conditions close to everyday living environments, and for example, prediction and management of the time to change diapers, etc. can be performed more accurately.
- the main unit of the present invention includes a sampling time generator 51, data sampling units 52 and 62 for temperature and humidity, and temperature data holding memory, which constitute the urination determination unit 5, in the main unit 2 attached to the outer surface of the diaper. 53, a humidity data retention memory 63, a device (not shown) capable of communicating with the outside, and a power supply section (not shown) for supplying necessary power to these.
- the main unit 2 includes a sampling time generation unit, a data sampling unit, a data holding memory, a device capable of wireless communication with the outside, and a power supply unit. is transmitted, and the CPU, storage device, etc.
- auxiliary device function as a change detection unit for one or both of temperature and humidity, urination detection unit, urination display means 58, etc., so that the main unit 2 is attached. It is possible to suppress the wearer's behavior from being restricted.
- the container 7 has an inner wall body 71 that forms a surface that contacts the outer surface of the diaper, and an opposite side that contacts the outer surface of the diaper. It is preferable to have vents 75 and 76 in each of the lateral outer covers 72 .
- the humidity sensor 4 in the container 7 provided with the ventilation parts 75 and 76, the moisture from the outer surface of the diaper is taken into the container 7, and the change in humidity is suppressed while eliminating the influence of the external environment. Measurement is possible, and the decrease in humidity after the increase in humidity can be caused relatively early. In addition, it is possible to prevent the humidity from being difficult to measure due to dew condensation occurring inside the container 7 . This makes it easier to detect the second and subsequent urinations based on changes in humidity, or changes in both humidity and temperature.
- the material for forming the container 7 include plastic, metal, ceramic, etc., but plastic is preferred.
- the humidity sensor 4 By measuring the humidity with the humidity sensor 4 in the container 7 provided with the ventilation parts 75 and 76, it is possible to urinate the second and subsequent times only with the humidity sensor 4. For example, in the example shown in FIG. 7, by setting the set value used for the first criterion at the position of the set value shown in FIG. Even if it is determined that there was urination based on only the first urination, the second and subsequent urinations can be determined with high accuracy.
- the container 7 has one or more of the following configurations (1) to (4).
- Both the moisture discharging portion 76 formed in the outer cover 72 and the moisture introducing portion 75 formed in the inner wall body 71 are ventilation portions formed of through holes.
- the opening area ratio is equal to or less than the opening area ratio of the through holes 75 formed in the inner wall body 71 . By doing so, it becomes easy to achieve both the ability to absorb moisture into the container 7 and the acceleration of the decrease in humidity after the increase in humidity due to urination, thereby improving the detection accuracy of urination. From the viewpoint of further improving such effects, it is preferable that the opening area ratio of the through holes 76 formed in the outer cover 72 is lower than the opening area ratio of the through holes 75 formed in the inner wall body 71 .
- the opening area ratio is preferably within the following range.
- the ratio of the opening area ratio of the through holes 76 formed in the outer cover 72 to the opening area ratio of the through holes 75 formed in the inner wall body 71 (outer cover 72/inner wall body 71) is preferably 10% or more, It is more preferably 30% or more, more preferably 100% or less, more preferably 80% or less, more preferably 10% or more and 100% or less, more preferably 30% or more and 80% or less.
- the opening area ratio of the through-holes 75 formed in the inner wall body 71 is preferably 1% or more, more preferably 3% or more, and preferably 50% or less, more preferably 30% or less.
- the opening area ratio of the through holes 76 formed in the outer cover 72 is preferably 0.1% or more, more preferably 1% or more, and is preferably 30% or less, more preferably 10% or less. It is preferably 0.1% or more and 30% or less, more preferably 1% or more and 10% or less.
- the opening area ratio (%) is the ratio of the total area of the through holes (ventilation parts) to the total surface area (including the area of the ventilation parts) of each of the outer cover 72 and the inner wall body 71, expressed as a percentage. is.
- a part of the container 7 is made of a moisture-permeable material.
- a moisture-permeable material moisture-permeable material
- a ventilation section can be provided.
- a moisture-permeable material is a material that allows moisture to pass through, and examples thereof include mesh sheets, non-woven fabrics, water-repellent sheets having fine pores, and air-permeable sheets. The "fine pores" are voids between fibers constituting the water-repellent sheet, and exclude pores formed in the water-repellent sheet by opening processing using a cutting device or the like.
- the degree of moisture permeability of the moisture-permeable material is, for example, moisture permeability measured according to the JIS Z0208 cup method is preferably 24 g/m 2 ⁇ 24 Hr or more, more preferably 48 g/m 2 ⁇ 24 Hr or more, and It is preferably 2400 g/m 2 ⁇ 24 Hr or less, more preferably 1200 g/m 2 ⁇ 24 Hr or less, more preferably 24 g/m 2 ⁇ 24 Hr or more and 2400 g/m 2 ⁇ 24 Hr or less, more preferably 48 g/m 2 ⁇ 24 Hr. It is not less than 1200 g/m 2 ⁇ 24 Hr.
- Each of the outer cover 72 and the inner wall body 71 is formed with a ventilation part made of a breathable material, and the ventilation part of the inner wall body 71 is more transparent than the ventilation part of the outer cover 72.
- High humidity By making the ventilation part of the inner wall body 71 higher in moisture permeability than the ventilation part of the outer cover 72, the accuracy of detecting a change in humidity is increased.
- the degree of moisture permeability can be judged by the moisture permeability measured according to the JIS Z0208 cup method. From this point of view, the moisture permeability of the ventilation part of the inner wall body 71 is preferably twice or more, more preferably three times or more, and preferably 100 times or less that of the ventilation part of the outer cover 72. , more preferably 10 times or less, more preferably 2 times or more and 100 times or less, and more preferably 3 times or more and 10 times or less.
- a waterproof and moisture-permeable material has a moisture permeability of 24 g/m 2 ⁇ 24 Hr or more as measured by the JIS Z0208 cup method.
- As the moisture-proof and moisture-permeable material it is preferable to use a waterproof nonwoven fabric, a moisture-permeable and liquid-impermeable film such as a microporous film, or the like.
- the microporous film is formed by, for example, melt-kneading a hydrophobic thermoplastic resin and fine inorganic fillers such as calcium carbonate or an organic polymer incompatible with the thermoplastic resin to form a film. It is obtained by uniaxially or biaxially stretching the film.
- waterproof nonwoven fabrics include nonwoven fabrics made of water-repellent raw cotton, and nonwoven fabrics made water-repellent by minute surface irregularities.
- the main unit 2 When the main unit 2 measures the temperature of the surface facing the outer surface S1 of the diaper, the main unit 2 should include a temperature transmission member (not shown) that transmits the temperature of the outer surface S1 of the diaper to the temperature sensor 3. is preferred. For example, when a temperature transmission member is disposed through the center of the through hole formed in the inner wall body 71, a part of the temperature transmission member is brought into contact with the temperature sensor, and the main unit 2 is attached to the diaper outer surface S1. Additionally, another portion of the temperature transfer member may be in contact with the outer surface S1 of the diaper.
- the temperature transfer member is preferably made of a material having a high thermal conductivity.
- the temperature transfer member is preferably made of stainless steel, a metal having a relatively high thermal conductivity such as copper or aluminum, or a ceramic such as alumina.
- the thermal conductivity of the temperature transfer member is preferably 20 W/m ⁇ K or more, more preferably 100 W/m ⁇ K or more.
- the temperature transfer member may be a gel agent or the like used as a cooling agent or the like. Examples of the gel agent include a gel agent in which a polymer absorbent is impregnated with a solvent and wrapped with a polymer film.
- the main unit 2 preferably has a fixing material 73 for fixing to the outer surface of the diaper on the surface facing the outer surface of the diaper.
- the fixing material 73 include an adhesive layer formed by applying an adhesive, a male member of a mechanical surface fastener, and the like.
- the method of attaching the main unit 2 to the outer surface S1 of the diaper is not particularly limited, and may be fixed with tape, fixed with a stretchable net, or stretchable tubular fixture attached around the body. and the like.
- a material that can be detachably fixed to the outer surface of the diaper is preferable.
- the main device 2 is fixed to the outer surface of the diaper at the urination portion of the diaper, the humidity of the outer surface, or the humidity and temperature of the outer surface is measured, and the rate of increase in the humidity is measured.
- a method of detecting urination in which it is determined that urination has occurred when the rate of increase in humidity and the rate of temperature increase exceed set values is an example of a preferred embodiment of the urination detection method of the present invention, and is an example of a preferred embodiment of the urination detection apparatus.
- the preferred configuration and explanation regarding 1 above can be appropriately applied to the urination detection method of the present invention.
- the diaper to which the main unit of the urination detection device of the present invention is attached or the diaper in the urination detection method of the present invention comprises an absorber 14 and a moisture-permeable leak-proof structure disposed on the outer surface side (non-skin facing side) of the absorber 14 . It preferably has a seat.
- the main unit 2 is attached to a portion of the outer surface S1 of the diaper that overlaps the moisture-permeable leak-proof sheet, so that moisture is released from the outer surface of the diaper during urination, and changes in humidity due to urination are detected. and the humidity and temperature of the outer surface are efficiently lowered before the next urination, thereby facilitating detection of the next urination and multiple urinations.
- a moisture-permeable and liquid-impermeable film such as a microporous film.
- the microporous film is formed by, for example, melt-kneading a hydrophobic thermoplastic resin and fine inorganic fillers such as calcium carbonate or an organic polymer incompatible with the thermoplastic resin to form a film. It is obtained by uniaxially or biaxially stretching the film. It is also preferable that the diaper to which the main unit 2 is to be attached has a portion to which the main unit 2 is to be attached printed, or an arrangement of a member to which the fastening material is likely to be attached.
- the urination detection device of the present invention preferably includes a main body device, in addition to a first urination detection section for detecting urination based on humidity or changes in humidity and humidity, a second urination detection section for detecting urination by an optical urination detection device.
- urination detector includes, for example, lighting and an optical sensor, and is configured such that the light emitted from the lighting is reflected by the outer surface of the urination site of the diaper, and the reflected light is input to the optical sensor. urination is detected by optically detecting a change in color or the like that occurs at the urination site.
- the absorbent article By detecting urination when urination is detected by the first urination detection unit and also by the optical urination detection device, erroneous detection is further suppressed, and highly accurate urination detection is achieved. It becomes possible. In order to change the color or the like of the urination site by urinating, it is also preferable to provide the absorbent article with an indicator that changes color upon contact with urine.
- the urination detection device may consist of only a main unit including the urination determination unit, or may have the function of the urination determination unit divided into the main unit and the auxiliary device.
- the urination determination unit 5 and a power supply unit such as a battery are arranged in the main unit 2.
- the unit may be provided in an auxiliary device that can communicate with the main device 2 .
- a communication unit that can transmit data with the auxiliary device by wire or wirelessly such as Wi-Fi (registered trademark) is provided in the main device 2, and the temperature or humidity data from the temperature sensor or humidity sensor is transmitted as necessary. It is also possible to output to an auxiliary device in which such an application or program is installed, and cause the auxiliary device to perform determination by the urination detection unit 56 and display of the determination result. In addition, functions other than the urination display means in the urination determination unit 5 can be performed by an auxiliary device.
- the auxiliary device is, for example, a mobile terminal such as a smart phone, a desktop or laptop computer, or the like.
- the battery provided in the power supply unit is preferably a rechargeable battery (secondary battery) such as a lithium-ion battery or a nickel-metal hydride battery, but may be a non-rechargeable dry battery, hydrogen battery, or the like.
- the shape of the main unit 2 can also be changed as appropriate.
- the main unit 2 can be elliptical, triangular, polygonal such as square, heart-shaped playing cards, or the like.
- the main unit 2 preferably has a flat shape with a height T smaller than the diameter or circle-equivalent diameter in plan view, but may have a non-flat shape.
- the outer cover may have a hat shape consisting of a dome-shaped portion and a flat portion extending outward from the periphery of the dome-shaped portion, or a cylindrical body having a flat top surface. .
- the inner wall body may also have a plan view shape that matches the plan view shape of the outer cover, or may not match the plan view shape of the outer cover.
- the surface of the main unit 2 facing the outer surface S1 of the diaper 10 is defined by an inner wall body in contact with the outer surface S1 and a stepped surface positioned farther from the outer surface S1 than the inner wall body. It is formed.
- FIG. 9 shows another example of the shape and formation position of these vents.
- FIG. 9(a) shows an example in which an outer cover 72 that covers the side opposite to the side that contacts the outer surface of the diaper is provided with a ventilation part 76 consisting of a through hole. or a waterproof and moisture-permeable material. 75 is provided. Further, if it is judged that urination has occurred when both the temperature change and the humidity change occur at the same time, the reliability of urination detection is improved. is not essential, and for example, only the inner wall body 71 of the outer cover 72 and the inner wall body 71 may have the ventilation part 75 .
- the temperature change detection and humidity change detection unit in the above-described embodiment detects temperature and humidity changes accompanying urination based on whether the temperature change speed and humidity change speed satisfy predetermined set values.
- the first determination may be made that the humidity has changed due to urination when the humidity exceeds a predetermined value, for example, 70% relative humidity.
- a predetermined value for example, 70% relative humidity.
- different methods may be used for the detection of the first urination and for the second and subsequent detections. Based on the urination frequency information stored in the urination detection frequency memory 57, the set value used for the first determination criterion or the second determination criterion can be changed according to the urination frequency.
- the following urine detection device or urine detection method is further disclosed.
- It has a built-in humidity sensor and a main unit that can be attached to the outer surface of the diaper, in the main device or in an auxiliary device that can communicate with the main device, A urination capable of detecting the second and subsequent urinations to the same diaper based on the change in humidity of the outer surface of the diaper being recorded while the main device is attached to the outer surface of the diaper.
- a urine detection device comprising a determination unit.
- the main body device incorporates the humidity sensor and the temperature sensor,
- the urination determination unit also records a change in the temperature of the outer surface of the diaper, and determines that urination has occurred when both the humidity and the temperature of the outer surface of the diaper measure a predetermined change, ⁇ 1. >.
- the main body device incorporates the humidity sensor and the temperature sensor,
- the urination determination unit also records changes in the temperature of the outer surface of the diaper, and after detecting the first urination, when both the humidity and the temperature of the outer surface of the diaper measure predetermined changes, 2
- the urination detection device according to ⁇ 1> or ⁇ 2> above, which determines that there has been urination after the first time.
- the main body device incorporates the humidity sensor and the temperature sensor, The urination determination unit also records changes in the temperature of the outer surface of the diaper, and when the relative humidity of the outer surface of the diaper is 75% or more and a predetermined change in the temperature of the outer surface is measured, the second and subsequent times
- the urination detection device according to ⁇ 1> or ⁇ 2>, which determines that urination has occurred.
- the main body device incorporates the humidity sensor and the temperature sensor, The urination determination unit also records changes in the temperature of the outer surface of the diaper, and determines that the second and subsequent urinations have occurred when it is measured that the absolute humidity and the temperature of the outer surface of the diaper increase simultaneously.
- the urine detection device according to ⁇ 2> or ⁇ 3>.
- the urination detection device according to any one of ⁇ 2> to ⁇ 5>, wherein the predetermined change in humidity is an increase in relative humidity at a rate of increase of 3%/minute or more.
- the rate of increase is a relative humidity increase of 4%/1 minute or more and 50%/1 minute or less.
- ⁇ 8> The urine detection device according to any one of ⁇ 2> to ⁇ 7>, wherein the predetermined change in humidity is an increase in absolute humidity with a rate of increase of (1.5 g/m 3 )/1 minute or more. . ⁇ 9>
- the humidity data acquisition interval is 2 minutes or less, preferably 1 second or more, more preferably 10 seconds or more, preferably 1 second or more and 2 minutes or less, more preferably 1 second or more and 1 minute or less, and further The urine detection device according to ⁇ 9> above, preferably for 10 seconds or more and 1 minute or less.
- the urination detection device according to any one of ⁇ 2> to ⁇ 10>, wherein the predetermined change in temperature is a temperature increase at a rate of increase of 0.2° C./minute or more.
- the rate of increase is 0.2° C./minute or more and 5° C./minute or less.
- the urination detection device according to ⁇ 11> or ⁇ 12>, wherein temperature data is acquired at intervals of 2 minutes or less, and the rate of increase in temperature is calculated from a difference from the temperature at the time of previous acquisition.
- the temperature data acquisition interval is 1 minute or less, preferably 1 second or more, more preferably 10 seconds or more, preferably 1 second or more and 2 minutes or less, more preferably 1 second or more and 1 minute or less, and further The urine detection device according to ⁇ 13> above, preferably for 10 seconds or more and 1 minute or less.
- the relative humidity is equal to or higher than a predetermined value and the rate of temperature rise is equal to or lower than a predetermined value. Equipped with a warning means to prompt diaper change when The condition for issuing a warning is The relative humidity is 75% or more and the rate of temperature increase is 0.2°C/1 minute or more and 1°C/1 minute or less, or the relative humidity is 75% or more and the temperature is increased.
- the urine detection device according to any one of ⁇ 1> to ⁇ 14> above, wherein the rate of increase is 0.2° C./1 minute or more and 0.5° C./1 minute or less.
- the main body device has a container in which at least the humidity sensor is arranged, a moisture introduction part that takes in moisture discharged from the outer surface of the diaper in the container, and the humidity sensor and the humidity sensor in the container.
- the urine detection device according to any one of ⁇ 1> to ⁇ 15> above, further comprising a moisture discharge section for discharging moisture after contact.
- the containing body has an inner wall forming a surface that contacts the outer surface of the diaper, and an outer cover that covers the side opposite to the side that contacts the outer surface of the diaper. is formed, and the moisture discharging portion is formed in the outer cover.
- the moisture introduction portion and the moisture discharge portion are through holes formed in the container, and the opening area ratio of the through holes formed in the outer cover is the opening of the through holes formed in the inner wall body.
- a ratio of an opening area ratio of the through holes formed in the outer cover to an opening area ratio of the through holes formed in the inner wall body is 10% or more, preferably 30% or more, and 100% or less. , preferably 80% or less, 10% or more and 100% or less, preferably 30% or more and 80% or less.
- the opening area ratio of the through holes formed in the inner wall body is 1% or more, preferably 3% or more, and 50% or less, preferably 30% or less, and 1% or more and 50% or less, The urination detection device according to ⁇ 18> above, which is preferably 3% or more and 30% or less.
- the opening area ratio of the through holes formed in the outer cover is 0.1% or more, preferably 1% or more, and 30% or less, preferably 10% or less, and 0.1% or more and 30%. % or less, preferably 1% or more and 10% or less.
- the urine detection device according to any one of ⁇ 16> to ⁇ 21>, wherein one or both of the moisture introduction portion and the moisture discharge portion are ventilation portions provided with a moisture-permeable material.
- the moisture-permeable material has a moisture permeability measured according to the JIS Z0208 cup method of 24 g/m 2 ⁇ 24 Hr or more, more preferably 48 g/m 2 ⁇ 24 Hr or more, and preferably 2400 g/m 2 ⁇ 24 Hr.
- a moisture permeability measured according to the JIS Z0208 cup method of 24 g/m 2 ⁇ 24 Hr or more, more preferably 48 g/m 2 ⁇ 24 Hr or more, and preferably 2400 g/m 2 ⁇ 24 Hr.
- the urine detection device according to any one of ⁇ 16> to ⁇ 21>, wherein the moisture introduction section has higher moisture permeability than the moisture discharge section.
- the moisture introduction part has a moisture permeability measured according to the JIS Z0208 cup method, which is twice or more, preferably three times or more, and not more than 100 times, preferably 10 times, that of the moisture discharge part.
- the urination detection device according to ⁇ 24> above, which is less than or equal to 2 times or more and 100 times or less, preferably 3 times or more and 10 times or less.
- ⁇ 26> The urination according to any one of ⁇ 16> to ⁇ 21>, wherein one or both of the moisture introduction part and the moisture discharge part are ventilation parts arranged with a material having waterproofness and moisture permeability. detection device.
- ⁇ 27> The urination detection device according to any one of ⁇ 1> to ⁇ 26>, wherein the body device is provided with a fastening material for fastening to the outer surface of the diaper.
- the main device includes a sampling time generation unit, a data sampling unit, a data retention memory, a change detection unit for one or both of temperature and humidity, an urination detection unit, and a power supply unit.
- the urination detection device according to any one of 1.
- the main unit includes a sampling time generating section, a data sampling section for temperature and humidity, a temperature data holding memory, a humidity data holding memory, a device capable of communicating with the outside, and a power supply section for supplying necessary power to these devices.
- the urine detection device according to any one of ⁇ 1> to ⁇ 29>.
- a urination detection method comprising measuring the humidity and temperature of the outer surface of the diaper at the urination portion of the diaper, and determining that urination has occurred when both the humidity and temperature rise rates exceed respective set values.
- the urination detection device and urination detection method of the present invention it is possible to detect urination in a highly accurate and sanitary manner, and it is possible to detect not only the first urination but also the second and subsequent urination.
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Abstract
Description
おむつの外側に湿度センサーを配置し、湿度の変化により排尿を検出する技術が知られている(特許文献1参照)。
前記排尿検出装置は、前記本体装置内又は該本体装置と通信可能な補助装置に、前記おむつの外面の湿度の変化を記録し、該湿度の変化に基づいて2回目以降の排尿があったことを検出可能な排尿判定部を備えることが好ましい。
前記排尿検出方法は、おむつの排尿部位におけるおむつの外面の湿度及び温度を計測し、該湿度及び該温度の上昇速度が共にそれぞれの設定値を超えたときに排尿があったと判定することが好ましい。
また特許文献2及び特許文献3には、使い捨ておむつの肌対向面側に温度センサー及び湿度センサーを配して排泄を検出する方法が記載されている。特許文献3においては、温度センサーと湿度センサーとの組み合わせにより排泄物の種類を判別する方法が記載されている。
しかしながら、肌対向面側にセンサーを配すると、センサーが排泄物に直接触れるため、センサーを再利用するには洗浄が必要であり、衛生上の課題がある。
本発明の一実施形態である排尿検出装置1は、図2に示されるように、おむつの外面S1に取り付けられる本体装置2を備えている。おむつ10は、好ましくは、使い捨ておむつである。
図2に示すおむつ10は、使い捨ておむつであり、液透過性の表面シート12、液不透過性又は撥水性の防漏シート13及び両シート12,13間に配置された液保持性の吸収体14を備えている。防漏シート13の非肌対向面側には、更に単層又は多層構造の不織布からなる外装シート15が配されている。また、おむつ10は、着用時に着用者の腹側に配される腹側部Aと、背側に配される背側部Bと、その間に位置する股下部Cとを有している。おむつ10は、パンツ型のおむつであり、腹側部Aの両側縁部と背側部Bの両側縁部とが互いに接合されており、それによって、一対のサイドシール部16,16、ウエスト開口部17及び一対のレッグ開口部18,18が形成されている。
本体装置2は、排尿による湿度変化の情報を的確に入手可能とする観点から、おむつの排尿部位のおけるおむつ外面に取り付けることが好ましい。おむつの排尿部位とは、内部に吸収体14が存する部位である。排尿のより確実な検出の観点から、本体装置2は、股下部Cにおける、内部に吸収体14が存する部位に取り付けることが好ましく、また股下部Cにおける幅方向中央部に取り付けることが好ましい。パンツ型のおむつ10において、股下部Cは、左右のレッグ開口部間に位置する領域であり、パンツ型以外のおむつにおいて、股下部Cは、平面状に拡げたおむつを、その縦方向の全長を5等分して5領域に分割したときの中央3領域である。
そして、内側壁体71と外側カバー72に囲まれた収容体7内の空間74内に、温度センサー3、湿度センサー4、及び排尿判定部5が配されている。
温度センサー3としては、熱電対、サーミスタ等が好ましく用いられる。湿度センサー4としては、各種公知のものを用いることができ、例えば、高分子抵抗式や高分子静電容量式の湿度センサー等を用いることができる。市販品を用いることもでき、例えばTDK社製の「湿度センサCHSタイプ」等を用いることもできる。以下、収容体7内の、湿度センサー4が配されている空間74を測定空間74ともいう。
本実施形態の排尿検出装置1の本体装置2を、図3に示すように、おむつの外面に取り付けた状態で、おむつに排尿があると、透湿性の防漏シート13を透過して外面S1から放出される湿気が、湿気導入部として機能する通気部75から測定空間74に導入されて、測定空間74内の湿度が上昇する。そして、排尿後には、湿度の上昇を生じさせた湿気が、湿気排出部として機能する通気部76から排出され、測定空間74内の湿度の低下が比較的早期に生じる。
おむつの外面の湿度の計測は、おむつの外面から放出する湿気を取り込んだ測定空間74内の湿度の計測であってもよい。湿度センサー4により計測する湿度は、相対湿度でも絶対湿度でもよいが、好ましくは相対湿度である。温度が低下すると、測定空間74内の飽和水蒸気量が低下するため、相対湿度は上昇する。通気部(湿気排出部)76が存在すると、排尿後に増加した湿気が、湿気排出部76から排出されることによって、測定空間74内の温度低下に併せて相対湿度が低下し易くする。測定空間74内の温度と湿度が効率よく低下することで、2回目以降の排尿後に上昇した湿度を検知し易くなる。
他方、おむつ外面の湿度は、初回の人工尿の注入時には、注入直後に急激に上昇した後、元の湿度付近までは低下しないものの、ピーク時の湿度よりも低い湿度(相対湿度77%付近)まで低下し、その湿度付近に維持された。2回目以降の注入時には、急激に上昇した後、再度、上昇する前の湿度付近まで低下したが、初回の人工尿注入前の湿度付近までは低下することはなく、高い湿度の状態が維持された。
湿度の変化は、初回の排尿時の変化に比して2回目以降の変化が極めて小さく、その変化に基づく排尿の検出は困難であったが、本実施形態における本体装置2のように、おむつの外面に対向配置される面に通気部75を設けるとともに、それ以外の部位に他の通気部76を設けて、おむつの外面側に配する等の工夫によって、2回目以降の排尿時にも湿度の上昇及び下降が明瞭に生じるようになり、湿度の変化に基づく2回目以降の排尿の検出が可能となる。
したがって、おむつ外面の湿度の変化を記録しておき、湿度に所定の基準を満たす変化が生じたとき、例えば湿度の上昇速度が設定値を超えたときに、排尿があったと判定することによって、2回目以降の排尿を検出することも可能である。なお、初回の排尿時には、温度及び湿度のいずれについても大きく変化するため、おむつ外面の湿度の変化を記録しておき、湿度に所定の基準を満たす変化が生じたとき、排尿があったと判定することによって、湿度の変化に基づき、初回の排尿を検出することは容易である。初回の排尿があったと判定する所定の基準としては、湿度の上昇速度が所定値を超えたか否かや、相対湿度が所定の値、例えば70%を超えたか否か等の多様な基準を採用し得る。
第1の判定基準としては、例えば、温度の上昇速度が設定値を超えたか否かであり、当該設定値を超えたときに第1の判定基準が満たされたと判定する。第2の判定基準としては、例えば、湿度の上昇速度が設定値を超えたか否かであり、当該設定値を超えたときに第2の判定基準が満たされたと判定する。
具体的には、排尿判定部5は、CPU(Central Processing Unit)、ROM(Read Only Memory)やRAM(Random Access Memory)等の記憶装置、タイマー等を含んで構成されている。排尿判定部5は、温度センサー3及び湿度センサー4と電気的に接続されており、排尿判定部5が行う処理は、例えば、CPUがROMやRAMなどに格納されたプログラムをRAMに展開して実行することにより実現される。
排尿判定部5は、図8に示すブロックダイアグラムに示されるように、機能的には、サンプリング時間発生部51、温度用のデータサンプリング部52、温度データ保持メモリ53、温度変化検出部54、湿度用のデータサンプリング部62、湿度データ保持メモリ63、湿度変化検出部64、変化検出設定メモリ55、排尿検出部56を備えている。
またサンプリング時間発生部51は、記憶装置に記憶されているデータ取得間隔情報に基づき、湿度用のデータサンプリング部62に、湿度センサー4による湿度の計測を行うタイミング又は湿度センサー4が計測した湿度から排尿検出処理に使用する湿度のデータを取得するタイミングに関するタイミング信号を出力する。タイミング信号が入力された湿度用のデータサンプリング部62は、タイミング信号が入力された時点の湿度及び時刻のデータを湿度データ保持メモリ63に格納する。データ取得間隔情報は、温度用と湿度用で共通であっても個別のものであってもよい。
湿度変化検出部64は、湿度データ保持メモリ63に格納されている過去の湿度及び時刻データ又は湿度用のデータサンプリング部62により新たに取得された湿度及び時刻情報から、湿度変化を示す指標として、所定時間当たりの湿度変化量を算出する。
排尿検出部56は、湿度変化検出部64が算出した所定時間当たりの湿度変化量を、変化検出設定メモリ55に格納されている湿度についての排尿の判定基準と対比する。この排尿の判定基準は、所定時間当たりの湿度変化量が、上昇速度が所定値を超える湿度上昇に該当するか否かであり、設定値を越えている場合は、排尿の第1の判定基準を満たすと判定し、超えていない場合は、第1の判定基準を満たさないと判定する。
排尿検出部56は、上述した第1の判定基準を満たすか否かという第1の判定及び第2の判定基準を満たすか否かという第2の判定を、任意の順序で順に行うか又は同時に行い、第1の判定基準及び第2の判定基準を共に満たす場合、排尿があったと判定する。
排尿検出部56は、排尿があったと判定した場合は、排尿表示手段58に排尿検出情報を表出させ、また排尿検出回数メモリ57に格納されている排尿回数情報に対して排尿回数を1回増加させる更新を行う。排尿表示手段58に表出させる排尿検出情報は、排尿があったことを、液晶等からなる画面に文字や記号、色等で表示するものでもよいし、音や音声、振動等で排尿を知らせるものであってもよい。排尿検出情報としては、排尿があったことに加えて排尿回数を併せて表出させることが好ましい。
排尿回数が増加するにつれて、温度の上昇速度が低下することを利用し、2回目以降の排尿を検出するときの第2の判定基準は、温度の上昇速度が所定範囲となったか否かとすることもできる。例えば、表1に示す2回目及び3回目の排尿時の温度上昇速度は、0.64℃/分、0.27℃/分であるので、相対湿度が75%以上であり、且つ上昇温度が0.2℃/1分以上1.3℃/1分以下であるときに、2回目以降の排尿があったと判定することもできる。
第1の判定基準として、相対湿度を75%としている。このように一律の値を基準とするのには、相対湿度が適している。絶対湿度では、温度が変化すると高湿度であると判断する基準となる値は温度次第で変化してしまう。
他方、2回目以降の排尿、例えば2回目や3回目の排尿を湿度の上昇速度で検知する場合には、第1の判定基準に絶対湿度を用いる方が、湿度を精度よく検知することが出来るので好ましい。
前述した排尿表示手段58は、排尿回数を表出させたり、おむつの交換を促す内容を付加することで、おむつの交換を促す警告手段となり得る。おむつの交換を促す警告は、直接的に交換を促す内容に限られず、排尿回数や吸収した合計尿量の目安を表出させるだけものであってもよい。おむつの交換を促す警告は、画面に文字や記号、色等で表示するものでもよいし、音や音声、振動等で知らせるものであってもよい。
温度の上昇速度を求めるために使用する温度データの取得間隔は、好ましくは2分以下、より好ましくは1分以下であり、また好ましくは1秒以上、より好ましくは10秒以上であり、また好ましくは1秒以上2分以下、より好ましくは1秒以上1分以下、更に好ましくは10秒以上1分以下である。
湿度データの取得間隔と温度データの取得間隔とは、同一であってもよく、異なっていてもよい。
上述したデータの取得間隔は、好ましくは、温度又は湿度の上昇速度を求めるために利用する2つの温度又は湿度が観測された時点間の間隔であり、温度又は湿度を連続的にモニターした場合に得られる連続データから適宜の2時点の値をピックアップし、それらの2時点の値及び時間間隔から温度又は湿度の上昇速度を求める場合、当該2時点間の間隔であってもよい。
図7には、第1の判定基準を満たすか否かを判定するのに用いる設定値、及び第2の判定基準を満たすか否かを判定するのに用いる設定値を、設定値のグラフ縦方向の位置を一致させた形で示されている。両設定値は、非排尿時のベースラインの見られる変動を超える値に設定されており、温度及び湿度の上昇速度が共にその設定値を超えた場合に、排尿検出部56に排尿があったと検知させることで、初回の排尿時のみならず、図7の右側に示す2回目の排尿時についても、誤検知なく高精度に排尿の検出が可能である。
これにより、湿度変化、又は湿度変化及び温度変化に基づく2回目以降の排尿の検出が容易となる。収容体7の形成材料としては、プラスチック、金属、セラミック等が挙げられるが、プラスチック製であることが好ましい。
前記の効果をより向上させる観点から、開口面積率は以下の範囲内であることが好ましい。
内側壁体71に形成された貫通孔75の開口面積率に対する外側カバー72に形成された貫通孔76の開口面積率の比率(外側カバー72/内側壁体71)は、好ましくは10%以上、より好ましくは30%以上であり、また好ましくは100%以下、より好ましくは80%以下であり、また好ましくは10%以上100%以下、より好ましくは30%以上80%以下である。
内側壁体71に形成された貫通孔75の開口面積率は、好ましくは1%以上、より好ましくは3%以上であり、また好ましくは50%以下、より好ましくは30%以下であり、また好ましくは1%以上50%以下、より好ましくは3%以上30%以下である。
外側カバー72に形成された貫通孔76の開口面積率は、好ましくは0.1%以上、より好ましくは1%以上であり、また好ましくは30%以下、より好ましくは10%以下であり、また好ましくは0.1%以上30%以下、より好ましくは1%以上10%以下である。
開口面積率(%)は、外側カバー72及び内側壁体71のそれぞれについて、表面の全面積(通気部の面積を含む)に対する貫通孔(通気部)の合計面積の割合を百分率で示した値である。
透湿性の素材の湿気を通す程度は、例えば、JIS Z0208 カップ法に従って測定される透湿率が、好ましくは24g/m2・24Hr以上、より好ましくは48g/m2・24Hr以上であり、また好ましくは2400g/m2・24Hr以下、より好ましくは1200g/m2・24Hr以下であり、また好ましくは24g/m2・24Hr以上2400g/m2・24Hr以下、より好ましくは48g/m2・24Hr以上1200g/m2・24Hr以下である。
斯かる観点から、内側壁体71の通気部の透湿率は、外側カバー72の通気部の透湿率の好ましくは2倍以上、より好ましくは3倍以上であり、また好ましくは100倍以下、より好ましくは10倍以下であり、また好ましくは2倍以上100倍以下、より好ましくは3倍以上10倍以下である。
温度伝達部材は、保冷剤等に用いられているゲル剤等であってもよい。ゲル剤としては、高分子吸収体に溶媒を含侵させたゲル剤を高分子膜で包んだもの等が挙げられる。
温度伝達部材を配して、おむつ外面の熱が温度センサーに伝達され易くすることで、おむつ外面S1の熱を検出し易くなり、また外部の温度変化による排尿の検出への影響を低減できる。
透湿性の防漏シートとしては、透湿性で且つ液不透過性のフィルム、例えば微多孔性フィルム等を用いることが好ましい。微多孔性フィルムは、例えば、疎水性の熱可塑性樹脂と、炭酸カルシウム等からなる微小な無機フィラー又は前記熱可塑性樹脂と相溶性のない有機高分子等とを溶融混練してフィルムを形成し、該フィルムを一軸又は二軸延伸して得られる。
本体装置2を取り付けるおむつには、本体装置2を取り付ける部位が、印刷や、止着材が止着されやすい部材の配置等により、表示されていることも好ましい。
光学的排尿検知装置としては、例えば、照明及び光学センサーを含み、照明から照射した光が、おむつの排尿部位の外面で反射し、その反射光が光学センサーに入力されるように構成され、排尿により排尿部位に生じる色等の変化を、光学的に検知して排尿を検出するものが挙げられる。第1の排尿検出部により排尿が検出され且つ光学的排尿検知装置によっても排尿が検出されたときに、排尿があったと検出することで、誤検出が一層抑制された高精度の排尿の検出が可能となる。排尿により排尿部位に色等の変化が生じるようにするには、吸収性物品に、尿と接触することにより色が変化するインジケータを配することも好ましい。
例えば、排尿検出装置は、排尿判定部を備える本体装置のみからなるものであってもよいが、排尿判定部の機能を、本体装置と補助装置とに分けて備えていてもよい。例えば、第1及び第2実施形態の排尿検出装置においては、本体装置2内に、排尿判定部5及び電池等の電力供給部が配されていたが、排尿判定部5の機能の全体又は一部を、本体装置2と通信可能な補助装置に設けてもよい。その場合、本体装置2内に、補助装置と有線又はWi-Fi(登録商標)等の無線でデータの伝達可能な通信部を設け、温度センサー又は湿度センサーからの温度又は湿度のデータを、必要なアプリやプログラムがインストールされた補助装置に対して出力し、該補助装置に、排尿検出部56の判定及び判定結果の表示を行わせることもできる。また、排尿判定部5における排尿表示手段以外の機能を補助装置に行わせることもできる。補助装置は、例えばスマートフォン等の携帯端末や、デスクトップ又はラップトップのパソコン等である。電力供給部が備える電池は、リチウムイオン電池やニッケル水素電池等の充電池(2次電池)であることが好ましいが、充電不可能な乾電池や水素電池等であってもよい。
また温度の変化及び湿度の変化が同時に生じたことをもって排尿があったと判定させると、排尿の検出の信頼性が向上するため、外側カバー72及び内側壁体71の両方に通気部を形成することは必須ではなく、例えば、外側カバー72及び内側壁体71のうちの内側壁体71のみに通気部75があってもよい。
<1>
湿度センサーを内蔵し、おむつの外面に取り付けられる本体装置を備え、
前記本体装置内又は該本体装置と通信可能な補助装置に、
前記本体装置を前記おむつの外面に取り付けた状態下に前記おむつの外面の湿度の変化を記録し、該湿度の変化に基づいて同一おむつに対する2回目以降の排尿があったことを検出可能な排尿判定部を備える、排尿検出装置。
<2>
前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の湿度及び温度に、それぞれ所定の変化がともに計測されたときに、排尿があったと判定する、前記<1>に記載の排尿検出装置。
前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、1回目の排尿を検出した後に、前記おむつの外面の湿度及び温度に、それぞれ所定の変化が共に計測されたときに、2回目以降の排尿があったと判定する、前記<1>又は<2>に記載の排尿検出装置。
<4>
前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の相対湿度が75%以上であり且つ該外面の温度に所定の変化が計測されたときに、2回目以降の排尿があったと判定する、前記<1>又は<2>に記載の排尿検出装置。
<5>
前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の絶対湿度と温度とが同時に上昇することが計測されたときに、2回目以降の排尿があったと判定する、前記<2>又は<3>に記載の排尿検出装置。
<6>
前記湿度における前記所定の変化は、上昇速度が3%/1分以上の相対湿度の上昇である、前記<2>~<5>のいずれか1に記載の排尿検出装置。
<7>
前記上昇速度が、4%/1分以上50%/1分以下の相対湿度の上昇である、前記<6>に記載の排尿検出装置。
前記湿度における前記所定の変化は、上昇速度が(1.5g/m3)/1分以上の絶対湿度の上昇である、前記<2>~<7>のいずれか1に記載の排尿検出装置。
<9>
湿度データの取得間隔が2分以下であり、前の取得時の湿度との差分から前記湿度の上昇速度を算出する、前記<6>~<8>のいずれか1に記載の排尿検出装置。
<10>
前記湿度データの取得間隔が2分以下であり、また好ましくは1秒以上、より好ましくは10秒以上であり、また好ましくは1秒以上2分以下、より好ましくは1秒以上1分以下、更に好ましくは10秒以上1分以下である、前記<9>に記載の排尿検出装置。
<11>
前記温度における前記所定の変化は、上昇速度が0.2℃/1分以上の温度上昇である、前記<2>~<10>のいずれか1に記載の排尿検出装置。
<12>
前記上昇速度が、0.2℃/1分以上5℃/1分以下である、前記<11>に記載の排尿検出装置。
<13>
温度データの取得間隔が2分以下であり、前の取得時の温度との差分から前記温度の上昇速度を算出する、前記<11>又は<12>に記載の排尿検出装置。
<14>
前記温度データの取得間隔が1分以下であり、また好ましくは1秒以上、より好ましくは10秒以上であり、また好ましくは1秒以上2分以下、より好ましくは1秒以上1分以下、更に好ましくは10秒以上1分以下である、前記<13>に記載の排尿検出装置。
排尿回数又は総吸収量が増加するに連れて、排尿時における温度の上昇速度が低下することを利用し、前記相対湿度が所定値以上であり、且つ前記温度の上昇速度が所定値以下となったとき、おむつの交換を促す警告手段を備えており、
警告を発する条件は、
前記相対湿度が75%以上であり、且つ前記温度の上昇速度が0.2℃/1分以上1℃/1分以下であるか、又は
前記相対湿度が75%以上であり、且つ前記温度の上昇速度が0.2℃/1分以上0.5℃/1分以下である、前記<1>~<14>のいずれか1に記載の排尿検出装置。
<16>
前記本体装置は、前記湿度センサーが少なくとも内部に配された収容体を有し、該収容体に、おむつの外面から排出された湿気を取り込む湿気導入部、及び該収容体内で、前記湿度センサーと接触した後の湿気を外部に排出させる湿気排出部が形成されている、前記<1>~<15>のいずれか1に記載の排尿検出装置。
<17>
前記収容体は、おむつの外面と接触させる側の面を形成する内側壁体と、おむつの外面と接触させる側とは反対側を覆う外側カバーを有し、前記内側壁体に前記湿気導入部が形成され、前記外側カバーに前記湿気排出部が形成されている、前記<16>に記載の排尿検出装置。
<18>
前記湿気導入部及び前記湿気排出部が、前記収容体に形成された貫通孔であり、前記外側カバーに形成された貫通孔の開口面積率が、前記内側壁体に形成された貫通孔の開口面積率以下である、前記<17>に記載の排尿検出装置。
前記内側壁体に形成された前記貫通孔の開口面積率に対する前記外側カバーに形成された前記貫通孔の開口面積率の比率が、10%以上、好ましくは30%以上であり、また100%以下、好ましくは80%以下であり、また10%以上100%以下、好ましくは30%以上80%以下である、前記<18>に記載の排尿検出装置。
<20>
前記内側壁体に形成された前記貫通孔の開口面積率は、1%以上、好ましくは3%以上であり、また50%以下、好ましくは30%以下であり、また1%以上50%以下、好ましくは3%以上30%以下である、前記<18>に記載の排尿検出装置。
<21>
前記外側カバーに形成された前記貫通孔の開口面積率は、0.1%以上、好ましくは1%以上であり、また30%以下、好ましくは10%以下であり、また0.1%以上30%以下、好ましくは1%以上10%以下である、前記<18>に記載の排尿検出装置。
<22>
前記湿気導入部及び前記湿気排出部のうちの一方又は双方が、透湿性の素材が配された通気部である、前記<16>~<21>のいずれか1項に記載の排尿検出装置。
<23>
前記透湿性の素材は、JIS Z0208 カップ法に従って測定される透湿率が、24g/m2・24Hr以上、より好ましくは48g/m2・24Hr以上であり、また好ましくは2400g/m2・24Hr以下、より好ましくは1200g/m2・24Hr以下であり、また好ましくは24g/m2・24Hr以上2400g/m2・24Hr以下、より好ましくは48g/m2・24Hr以上1200g/m2・24Hr以下である、前記<22>に記載の排尿検出装置。
<24>
前記湿気導入部の方が、前記湿気排出部よりも透湿性が高い、前記<16>~<21>のいずれか1に記載の排尿検出装置。
<25>
前記湿気導入部は、JIS Z0208 カップ法に従って測定される透湿率が、前記湿気排出部の該透湿率の2倍以上、好ましくは3倍以上であり、また100倍以下、好ましくは10倍以下であり、また2倍以上100倍以下、好ましくは3倍以上10倍以下である、前記<24>に記載の排尿検出装置。
<26>
前記湿気導入部及び前記湿気排出部のうちの一方又は双方が、防水性及び透湿性を有する素材が配された通気部である、前記<16>~<21>のいずれか1に記載の排尿検出装置。
前記本体装置に、おむつの外面に止着させるための止着材が設けられている、前記<1>~<26>のいずれか1に記載の排尿検出装置。
<28>
光学的排尿検知装置を更に備える、前記<1>~<27>のいずれか1に記載の排尿検出装置。
<29>
前記本体装置内に、サンプリング時間発生部、データサンプリング部、データ保持メモリ、温度及び湿度の一方又は双方についての変化検出部、排尿検出部及び電力供給部を含む、前記<1>~<28>のいずれか1に記載の排尿検出装置。
<30>
前記本体装置内に、サンプリング時間発生部、温度及び湿度用のデータサンプリング部、温度データ保持メモリ、湿度データ保持メモリ、外部と通信可能な装置及びこれらに必要な電力を供給する電力供給部を含む、前記<1>~<29>ののいずれか1に記載の排尿検出装置。
<31>
おむつの排尿部位におけるおむつの外面の湿度及び温度を計測し、該湿度及び該温度の上昇速度が共にそれぞれの設定値を超えたときに排尿があったと判定する、排尿検出方法。
Claims (31)
- 湿度センサーを内蔵し、おむつの外面に取り付けられる本体装置を備え、
前記本体装置内又は該本体装置と通信可能な補助装置に、
前記本体装置を前記おむつの外面に取り付けた状態下に前記おむつの外面の湿度の変化を記録し、該湿度の変化に基づいて同一おむつに対する2回目以降の排尿があったことを検出可能な排尿判定部を備える、排尿検出装置。 - 前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の湿度及び温度に、それぞれ所定の変化がともに計測されたときに、排尿があったと判定する、請求項1に記載の排尿検出装置。 - 前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、1回目の排尿を検出した後に、前記おむつの外面の湿度及び温度に、それぞれ所定の変化が共に計測されたときに、2回目以降の排尿があったと判定する、請求項1又は2に記載の排尿検出装置。 - 前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の相対湿度が75%以上であり且つ該外面の温度に所定の変化が計測されたときに、2回目以降の排尿があったと判定する、請求項1又は2に記載の排尿検出装置。 - 前記本体装置は、前記湿度センサー及び温度センサーを内蔵しており、
前記排尿判定部は、前記おむつの外面の温度の変化も記録し、前記おむつの外面の絶対湿度と温度とが同時に上昇することが計測されたときに、2回目以降の排尿があったと判定する、請求項2又は3に記載の排尿検出装置。 - 前記湿度における前記所定の変化は、上昇速度が3%/1分以上の相対湿度の上昇である、請求項2~5のいずれか1項に記載の排尿検出装置。
- 前記上昇速度が、4%/1分以上50%/1分以下の相対湿度の上昇である、請求項6に記載の排尿検出装置。
- 前記湿度における前記所定の変化は、上昇速度が(1.5g/m3)/1分以上の絶対湿度の上昇である、請求項2~7のいずれか1項に記載の排尿検出装置。
- 湿度データの取得間隔が2分以下であり、前の取得時の湿度との差分から前記湿度の上昇速度を算出する、請求項6~8のいずれか1項に記載の排尿検出装置。
- 前記湿度データの取得間隔が1秒以上2分以下である、請求項9に記載の排尿検出装置。
- 前記温度における前記所定の変化は、上昇速度が0.2℃/1分以上の温度上昇である、請求項2~10のいずれか1項に記載の排尿検出装置。
- 前記上昇速度が、0.25℃/1分以上5℃/1分以下である、請求項11に記載の排尿検出装置。
- 温度データの取得間隔が2分以下であり、前の取得時の温度との差分から前記温度の上昇速度を算出する、請求項11又は12に記載の排尿検出装置。
- 前記温度データの取得間隔が1秒以上2分以下である、請求項11に記載の排尿検出装置。
- 排尿回数又は総吸収量が増加するに連れて、排尿時における温度の上昇速度が低下することを利用し、前記相対湿度が所定値以上であり、且つ前記温度の上昇速度が所定値以下となったときに、おむつの交換を促す警告手段を備える、請求項1~14のいずれか1項に記載の排尿検出装置。
- 前記本体装置は、前記湿度センサーが少なくとも内部に配された収容体を有し、該収容体に、おむつの外面から排出された湿気を取り込む湿気導入部、及び該収容体内で、前記湿度センサーと接触した後の湿気を外部に排出させる湿気排出部が形成されている、請求項1~15のいずれか1項に記載の排尿検出装置。
- 前記収容体は、おむつの外面と接触させる側の面を形成する内側壁体と、おむつの外面と接触させる側とは反対側を覆う外側カバーを有し、前記内側壁体に前記湿気導入部が形成され、前記外側カバーに前記湿気排出部が形成されている、請求項16に記載の排尿検出装置。
- 前記湿気導入部及び前記湿気排出部が、前記収容体に形成された貫通孔であり、前記外側カバーに形成された貫通孔の開口面積率が、前記内側壁体に形成された貫通孔の開口面積率以下である、請求項17に記載の排尿検出装置。
- 前記内側壁体に形成された前記貫通孔の開口面積率に対する前記外側カバーに形成された前記貫通孔の開口面積率の比率が、10%以上100%以下である、請求項18に記載の排尿検出装置。
- 前記内側壁体に形成された前記貫通孔の開口面積率は、1%以上50%以下である、請求項18に記載の排尿検出装置。
- 前記外側カバーに形成された前記貫通孔の開口面積率は、0.1%以上30%以下である、請求項18に記載の排尿検出装置。
- 前記湿気導入部及び前記湿気排出部のうちの一方又は双方が、透湿性の素材が配された通気部である、請求項16~21のいずれか1項に記載の排尿検出装置。
- 前記透湿性の素材は、JIS Z0208 カップ法に従って測定される透湿率が、24g/m2・24Hr以上2400g/m2・24Hr以下である、請求項22に記載の排尿検出装置。
- 前記湿気導入部の方が、前記湿気排出部よりも透湿性が高い、請求項16~21のいずれか1項に記載の排尿検出装置。
- 前記湿気導入部は、JIS Z0208 カップ法に従って測定される透湿率が、前記湿気排出部の該透湿率の2倍以上100倍以下である、請求項24に記載の排尿検出装置。
- 前記湿気導入部及び前記湿気排出部のうちの一方又は双方が、防水性及び透湿性を有する素材が配された通気部である、請求項16~21のいずれか1項に記載の排尿検出装置。
- 前記本体装置に、おむつの外面に止着させるための止着材が設けられている、請求項1~26のいずれか1項に記載の排尿検出装置。
- 光学的排尿検知装置を更に備える、請求項1~27のいずれか1項に記載の排尿検出装置。
- 前記本体装置内に、サンプリング時間発生部、データサンプリング部、データ保持メモリ、温度及び湿度の一方又は双方についての変化検出部、排尿検出部及び電力供給部を含む、請求項1~28のいずれか1項に記載の排尿検出装置。
- 前記本体装置内に、サンプリング時間発生部、温度及び湿度用のデータサンプリング部、温度データ保持メモリ、湿度データ保持メモリ、外部と通信可能な装置及びこれらに必要な電力を供給する電力供給部を含む、請求項1~29のいずれか1項に記載の排尿検出装置。
- おむつの排尿部位におけるおむつの外面の湿度及び温度を計測し、該湿度及び該温度の上昇速度が共にそれぞれの設定値を超えたときに排尿があったと判定する、排尿検出方法。
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US20130110061A1 (en) * | 2011-10-28 | 2013-05-02 | Kimberly-Clark Worldwide, Inc. | Electronic Discriminating Device for Body Exudate Detection |
JP2014515305A (ja) * | 2011-06-03 | 2014-06-30 | ザ プロクター アンド ギャンブル カンパニー | 窒息防止特性を備えるセンサーシステム |
JP2020201053A (ja) * | 2019-06-06 | 2020-12-17 | 日立オートモティブシステムズ株式会社 | 物理量計測装置 |
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JP2014515305A (ja) * | 2011-06-03 | 2014-06-30 | ザ プロクター アンド ギャンブル カンパニー | 窒息防止特性を備えるセンサーシステム |
US20130110061A1 (en) * | 2011-10-28 | 2013-05-02 | Kimberly-Clark Worldwide, Inc. | Electronic Discriminating Device for Body Exudate Detection |
JP2020201053A (ja) * | 2019-06-06 | 2020-12-17 | 日立オートモティブシステムズ株式会社 | 物理量計測装置 |
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