CN116981435A

CN116981435A - Urination detection device

Info

Publication number: CN116981435A
Application number: CN202280020567.8A
Authority: CN
Inventors: 山城高久; 福田优子
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2021-03-19
Filing date: 2022-03-17
Publication date: 2023-10-31
Also published as: JPWO2022196765A1; JP7232966B2; TW202243659A; WO2022196765A1

Abstract

A urination detection device (1) of the present invention comprises a body device (2) having a humidity sensor (4) incorporated therein and attached to the outer surface of a diaper, wherein a urination judgment unit (5) is provided in the body device (2) or in an auxiliary device capable of communicating with the body device, and the urination judgment unit (5) records changes in the humidity of the outer surface of the diaper, and judges that urination has occurred 2 nd and later based on the changes in the humidity. The urination detecting method of the present invention measures the humidity and temperature of the outer surface of the diaper at the urination site of the diaper, and determines that urination is present when the humidity and the temperature rise rate exceed the respective set values.

Description

Urination detection device

Technical Field

The present invention relates to a urination detecting device.

Background

There is known a technique for detecting urination of a wearer of a disposable diaper by a urination sensor and notifying the urination for the purpose of reducing a nursing burden. As a method for detecting urination, a method of detecting a temperature or humidity increased by urination is known.

There is known a technique of disposing a humidity sensor on the outside of a diaper and detecting urination from a change in humidity (see patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2006-043389

Patent document 2: japanese patent laid-open publication No. 2019-146721

Patent document 3: japanese patent laid-open publication No. 2018-23777

Disclosure of Invention

The present invention relates to a urination detecting device including a body device having a humidity sensor incorporated therein and attached to an outer surface of a diaper.

Preferably, the urination detecting device is provided with a urination judging unit in the main body device or an auxiliary device capable of communicating with the main body device, the urination judging unit recording a change in humidity of the outer surface of the diaper, and being capable of detecting the presence of urination 2 nd and later based on the change in humidity.

Furthermore, the present invention relates to a urination detection method.

Preferably, the urination detecting method measures the humidity and temperature of the outer surface of the diaper at the urination site of the diaper, and determines that urination is present when the humidity and the temperature rise rate exceed the respective set values.

Drawings

Fig. 1 is a view showing a main body device of a urination detecting device according to an embodiment of the present invention, wherein (a) is a sectional view of (b) in I-I, (b) is a plan view, and (c) is a bottom view.

Fig. 2 is a perspective view showing a pants-type disposable diaper as an example of a diaper to which a main body device is attached.

Fig. 3 is a schematic cross-sectional view showing the main body device and its vicinity in a state of being attached to the outer surface of a diaper.

Fig. 4 is an explanatory diagram of a measuring device used in a measurement test for investigating changes in humidity and temperature of the outer surface of a diaper caused by urination.

Fig. 5 is a graph showing changes in temperature and humidity of the outer surface of a diaper when 40mL of artificial urine is supplied to the diaper a plurality of times.

Fig. 6 is a graph showing details of changes in temperature and humidity before and after the 3 rd injection shown in fig. 5.

Fig. 7 is a graph showing a difference between a value obtained at the previous time of data acquisition and a value obtained at the next time of data acquisition, divided by an acquisition interval, as a change amount per 1 minute, for each of temperature data and humidity data.

Fig. 8 is a block diagram of a urination determining unit according to an embodiment of the present invention.

Fig. 9 is a schematic view showing another example of the inner wall or the outer cover provided with the ventilation portion.

Detailed Description

When the humidity sensor is disposed outside the diaper, there is a disadvantage that it is easily affected by the external environment, and it is easy to erroneously detect urination as a change in humidity due to urination, which is not due to urination.

Patent documents 2 and 3 disclose a method of detecting excretion by disposing a temperature sensor and a humidity sensor on the skin-facing surface side of a disposable diaper. Patent document 3 describes a method for discriminating the type of excrement by using a combination of a temperature sensor and a humidity sensor.

However, if the sensor is disposed on the skin-facing surface side, the sensor directly contacts excrement, and therefore, the sensor must be cleaned for reuse, which causes a sanitary problem.

In addition, many diapers have an absorbent capacity capable of coping with multiple urination, and there are cases where multiple urination occurs during wearing of one diaper. Since the humidity increased by the initial urination is also easily maintained after urination, the change in urination at the time of the 2 nd and subsequent times is extremely small compared to the change in urination at the time of the initial urination, and therefore it is difficult for the urination detection based on the humidity change to accurately detect urination at the time of the 2 nd and subsequent times without erroneous detection no matter where the humidity sensor is arranged.

The present invention relates to a urination detecting device capable of eliminating the problems of the prior art.

Hereinafter, the urination detecting device according to the present invention will be described based on preferred embodiments.

As shown in fig. 2, the urination detecting device 1 according to an embodiment of the present invention includes a main body device 2 attached to an outer surface S1 of a diaper. The diaper 10 is preferably a disposable diaper.

The diaper 10 shown in fig. 2 is a disposable diaper and includes a liquid-permeable front sheet 12, a liquid-impermeable or water-repellent leakage-preventing sheet 13, and a liquid-retentive absorbent member 14 disposed between the two sheets 12, 13. An outer sheet 15 made of a nonwoven fabric having a single-layer or multi-layer structure is further disposed on the non-skin-facing surface side of the leakage preventing sheet 13. The diaper 10 has a side portion a disposed on the side of the abdomen of the wearer when worn, a back portion B disposed on the back side, and a crotch portion C located therebetween. The diaper 10 is a pants-type diaper, and both side edges of the abdomen-side portion a and both side edges of the back-side portion B are joined to each other, thereby forming a pair of side seals 16, a waist-opening 17, and a pair of leg-openings 18, 18.

As the front sheet 12, the leakage preventing sheet 13, and the absorber 14, various articles previously used for such articles can be used, respectively, without particular limitation. For example, various nonwoven fabrics, apertured films, and the like can be used as the front sheet 12, and a resin film, a laminate of a resin film and a nonwoven fabric, and the like can be used as the leakage preventing sheet 13. As the absorber 14, a structure in which an absorbent core composed of particles of a superabsorbent polymer and a fibrous material is covered with a core sheet, or the like can be used. The leakage preventing sheet 13 is preferably a moisture permeable sheet.

The main body device 2 is a device to be attached to the outer surface S1 of the diaper. The inner surface of the diaper faces the skin side of the wearer when the diaper is worn, and the outer surface of the diaper faces the opposite side of the skin side of the wearer when the diaper is worn.

From the viewpoint of being able to accurately obtain information on the change in humidity caused by urination, the main body device 2 is preferably mounted on the outer surface of the diaper at the urination site of the diaper. The urination site of the diaper is a site where the absorber 14 is present inside. From the viewpoint of more reliable detection of urination, the main body device 2 is preferably attached to the crotch portion C at a position where the absorber 14 is present therein, and is preferably attached to the widthwise central portion of the crotch portion C. In the pants-type diaper 10, the crotch part C is a region located between the left and right leg openings, and in the diapers other than the pants-type diaper, the crotch part C is the central 3 regions when the entire longitudinal length of the diaper that is spread out in a planar manner is divided into 5 regions by 5 equal parts.

As shown in fig. 1 (a), the urination detecting device 1 of the present embodiment has a temperature sensor 3 and a humidity sensor 4 incorporated in a main body device 2. The body device 2 is provided with a urination determining unit 5. The main body device 2 includes a housing body 7 in which at least the humidity sensor 4 is disposed, and the housing body 7 includes an inner wall body 71 forming a surface on a side contacting the outer surface S1 of the diaper 10, and an outer cover 72 covering a side opposite to the side contacting the outer surface S1 of the diaper 10. Hereinafter, the outer surface S1 of the diaper is also referred to as the diaper outer surface S1, and the inner surface S2 of the diaper is referred to as the diaper inner surface S2.

In a space 74 in the housing 7 surrounded by the inner wall 71 and the outer cover 72, the temperature sensor 3, the humidity sensor 4, and the urination determining section 5 are disposed.

As the temperature sensor 3, a thermocouple, a thermistor, or the like is preferably used. As the humidity sensor 4, various known components can be used, and for example, a polymer resistor type humidity sensor, a polymer capacitance type humidity sensor, or the like can be used. Commercially available products such as "humidity sensor CHS type" manufactured by TDK corporation may be used. Hereinafter, the space 74 in the housing 7 in which the humidity sensor 4 is disposed is also referred to as a measurement space 74.

Further, a ventilation portion 75 formed of a through hole is formed in the inner wall body 71, and a ventilation portion 76 formed of a through hole is also formed in the outer cover 72. The ventilation portion 75 formed in the inner wall body 71 is formed on a surface disposed opposite to the outer surface of the diaper, and functions as a moisture introduction portion for taking in the moisture discharged from the outer surface S1 of the diaper into the measurement space 74, and the ventilation portion 76 formed in the outer cover 72 is formed at a portion other than the surface disposed opposite to the outer surface of the diaper, and functions as a moisture discharge portion for discharging the moisture contacted with the humidity sensor 4 to the outside.

In a state where the body device 2 of the urination detecting device 1 according to the present embodiment is attached to the outer surface of a diaper as shown in fig. 3, when urination occurs in the diaper, moisture released from the outer surface S1 through the moisture-permeable leakage preventing sheet 13 is introduced into the measurement space 74 from the ventilation unit 75 functioning as a moisture introduction unit, and the humidity in the measurement space 74 increases. After urination, the moisture having the rise in humidity is discharged from the ventilation unit 76 functioning as a moisture discharge unit, and the decrease in humidity in the measurement space 74 occurs earlier.

According to the present embodiment, by measuring the humidity in the measurement space 74 with the humidity sensor 4, the humidity change occurring on the outer surface of the diaper due to urination can be accurately measured, and it is possible to accurately detect not only when urination is performed for the first time but also when urination is performed 2 nd and later.

The measurement of the humidity of the outer surface of the diaper may be a measurement of the humidity in the measurement space 74 into which the humidity released from the outer surface of the diaper is taken. The humidity measured by the humidity sensor 4 may be either relative humidity or absolute humidity, but is preferably relative humidity. As the temperature decreases, the amount of saturated water vapor in the measurement space 74 decreases, and thus the relative humidity increases. When the ventilation portion (moisture discharge portion) 76 is present, moisture that increases after urination is discharged from the moisture discharge portion 76, whereby the relative humidity is liable to decrease together with a decrease in temperature in the measurement space 74. Since the temperature and humidity in the measurement space 74 are efficiently reduced, it is easy to detect the humidity rising after the urination of the 2 nd and later times.

Fig. 4 is an explanatory view of a measuring device used in a measurement test for investigating humidity and temperature changes on the outer surface of a diaper caused by urination, and fig. 5 is a graph showing temperature and humidity changes on the outer surface of a diaper when artificial urine is supplied to the diaper a plurality of times using the measuring device shown in fig. 4. The graph shown in fig. 5 is obtained by spreading and fixing the diaper 10 in a planar shape after peeling off the side seal portion as shown in fig. 4, monitoring the temperature and humidity of the outer surface of the diaper by a temperature sensor and a humidity sensor mounted in the main body device 2 of the outer surface of the diaper, and feeding artificial urine 3 times at 1 hour intervals to the inner surface side of the diaper. The diaper 10 which is developed in a planar shape is a hanging frame-shaped support portion in which the periphery of the absorption portion in which the absorber 14 is disposed is fixed to the acrylic resin support 82. A warm water tank 83 is disposed above the support 82, and the temperature of the inner surface side of the diaper is maintained at about 36 ℃. The artificial urine was prepared by supplying physiological saline, which was kept at 36℃for about 10 seconds, to the liquid feed pump 84.

As shown in the graph of fig. 5, at the time of the initial artificial urine injection 2 hours after the start of the environmental acclimation, the temperature of the outer surface of the diaper was rapidly increased immediately after the injection and then decreased to the vicinity of the original temperature or lower than the original temperature, and at the time of the injection 2 nd and later, was also rapidly increased and then decreased to the vicinity of the original temperature or lower than the original temperature.

On the other hand, when artificial urine is injected for the first time, the humidity of the outer surface of the diaper increases rapidly immediately after the initial injection, and then does not decrease to a humidity near the original humidity, but decreases to a humidity lower than the humidity at the peak (near 77% relative humidity), and is maintained near this humidity. After the 2 nd and subsequent injections, the humidity is decreased again to the vicinity of the humidity before the rising after the rapid rising, but the humidity is not decreased to the vicinity of the humidity before the initial injection of artificial urine, and the high humidity state is maintained.

Fig. 6 is a graph showing details of changes in temperature and humidity after injection at the time of the 3 rd injection shown in fig. 5. As shown in fig. 6, although the injection was performed 2 nd and subsequent times such as the 3 rd time, both the temperature and the humidity were rapidly increased after about 1 minute from the 3 rd injection time (4:05), and after the peak was reached, the temperature was decreased from the peak within 3 minutes from the injection time. As shown in fig. 5, the change in temperature and humidity at the time of the 2 nd injection also showed the same change as at the time of the 3 rd injection.

As for the change in humidity, the change after the 2 nd time is extremely small compared with the change at the time of the first urination, and it is difficult to detect urination based on the change, but as in the main body device 2 of the present embodiment, by providing the ventilation portion 75 on the surface disposed opposite to the outer surface of the diaper and providing the other ventilation portion 76 on the outer surface side of the diaper or the like in the other portion, the rise and fall in humidity can be clearly generated even at the time of urination after the 2 nd time, and urination after the 2 nd time can be detected based on the change in humidity.

Thus, when the humidity changes to satisfy a predetermined criterion, for example, when the rising speed of the humidity exceeds a set value, it is determined that urination is present, and urination at the 2 nd and subsequent times can be detected. Further, since both the temperature and the humidity change greatly at the time of primary urination, the change in the humidity of the outer surface of the diaper is recorded in advance, and when the humidity changes to satisfy a predetermined criterion, it is determined that urination is present, and therefore primary urination is easily detected based on the change in humidity. As a predetermined criterion for determining that there is initial urination, various criteria such as whether the rising speed of humidity exceeds a predetermined value or whether the relative humidity exceeds a predetermined value, for example, whether the rising speed exceeds 70% can be used.

From the standpoint of suppressing erroneous detection of a change that is not caused by urination due to a change in the external environment or the like as a change caused by urination, particularly from the standpoint of improving the detection accuracy of urination 2 nd and later, it is preferable to determine that urination is present when the 1 st criterion based on humidity and the 2 nd criterion based on temperature are satisfied at the same time. The term "simultaneously" means that the humidity change satisfying the 1 st judgment criterion and the temperature change satisfying the 2 nd judgment criterion are generated within 2 minutes.

As the 1 st judgment criterion, for example, whether or not the rising speed of the temperature exceeds a set value, and when the rising speed exceeds the set value, it is judged that the 1 st judgment criterion is satisfied. As the 2 nd judgment criterion, for example, whether the rising speed of the humidity exceeds a set value or not, and when the rising speed exceeds the set value, it is judged that the 2 nd judgment criterion is satisfied.

As shown in fig. 8, the urination determining unit 5 according to embodiment 1 has the following functions: changes in temperature and humidity of the outer surface of the diaper are recorded, and urination is determined when the 1 st determination criterion that the rising speed of the humidity exceeds a set value and the 2 nd determination criterion that the rising speed of the temperature exceeds the set value are satisfied at the same time.

Specifically, the urination judging unit 5 includes a storage device such as a CPU (Central Processing Unit ), a ROM (Read Only Memory), a RAM (Random Access Memory ), a timer, and the like. The urination determining unit 5 is electrically connected to the temperature sensor 3 and the humidity sensor 4, and the processing performed by the urination determining unit 5 is realized by, for example, a CPU expanding and executing a program stored in ROM, RAM, or the like in RAM.

As shown in the block diagram of fig. 8, the urination determining unit 5 functionally includes a sampling time generating unit 51, a temperature data sampling unit 52, a temperature data holding memory 53, a temperature change detecting unit 54, a humidity data sampling unit 62, a humidity data holding memory 63, a humidity change detecting unit 64, a change detection setting memory 55, and a urination detecting unit 56.

The sampling time generation unit 51 outputs a timing signal to the temperature data sampling unit 52 regarding the timing of temperature measurement by the temperature sensor 3 or the timing of acquiring temperature data for urination detection processing from the temperature measured by the temperature sensor 3, based on the data acquisition interval information stored in the storage device. The data sampling unit 52 to which the timing signal is input stores the temperature and time data at the time point when the timing signal is input in the temperature data holding memory 53.

The sampling time generation unit 51 obtains interval information based on the data stored in the storage device, and outputs a timing signal to the humidity data sampling unit 62 regarding the timing of the humidity measurement by the humidity sensor 4 or the timing of obtaining the humidity data for the urination detection process based on the humidity measured by the humidity sensor 4. The humidity data sampling unit 62 to which the timing signal is input stores the humidity and time data at the time point when the timing signal is input in the humidity data holding memory 63. The temperature data acquisition interval information and the humidity data acquisition interval information may be shared or may be different.

The temperature change detecting unit 54 calculates the amount of temperature change per predetermined time as an index indicating the temperature change, based on 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.

The humidity change detecting unit 64 calculates the amount of humidity change per predetermined time as an index indicating the humidity change based on 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.

The urination detecting unit 56 compares the humidity change amount calculated by the humidity change detecting unit 64 for each predetermined time with the urination judgment reference concerning the humidity stored in the change detection setting memory 55. The criterion for urination is whether or not the humidity change amount per predetermined time corresponds to the rise of the humidity whose rise rate exceeds a predetermined value, and if the rise rate exceeds the predetermined value, the 1 st criterion for urination is determined to be satisfied, and if the rise rate does not exceed the predetermined value, the 1 st criterion is determined not to be satisfied.

The urination detecting unit 56 compares the temperature change amount calculated by the temperature change detecting unit 54 per predetermined time with the temperature urination judgment reference stored in the change detection setting memory 55. The criterion for urination is whether or not the temperature change amount per predetermined time corresponds to a temperature rise exceeding a predetermined value in the rise rate, and if the temperature change amount exceeds the predetermined value, the criterion for urination is determined to be satisfied in the 2 nd criterion, and if the temperature change amount does not exceed the predetermined value, the criterion is determined not to be satisfied in the 2 nd criterion.

The urination detecting unit 56 sequentially or simultaneously performs the 1 st judgment whether or not the 1 st judgment reference and the 2 nd judgment whether or not the 2 nd judgment reference are satisfied in an arbitrary order, and judges that urination is present when the 1 st judgment reference and the 2 nd judgment reference are satisfied at the same time.

The urination judging unit 5 in the present embodiment includes a urination display unit 58. Further, a urination detection number memory 57 is included to be able to store or display the number of times of urination.

When it is determined that there is urination, the urination detecting unit 56 causes the urination detecting means 58 to display urination detecting information, and updates the urination count information stored in the urination count memory 57 by 1. The urination detection information displayed on the urination display unit 58 may be displayed with urination on a screen formed of liquid crystal or the like by characters, symbols, colors or the like, or may be notified of urination by sounds, voices, vibrations or the like. The urination detection information preferably displays the number of urination in addition to urination.

In the 1 st judgment, the urination judgment unit 5 preferably judges that the 1 st judgment criterion is satisfied when the relative humidity rise rate is 3% or more every 1 minute, that is, the relative humidity is 3%/1 minute or more. By detecting urination with the rapid rise in humidity as a reference, the difference between the change in humidity due to external environment or contact and the change in humidity due to urination is made more obvious, and erroneous detection of a change in humidity not due to urination as urination can be prevented more reliably. From this viewpoint, the rate of rise in humidity used as the 1 st judgment criterion for judging that urination is present is preferably 3% or more, more preferably 4% or more and 50% or less, and still more preferably 5% or more and 50% or less, of the rise in relative humidity per 1 minute. The "%" of the rising speed of the relative humidity means a percentage point, and the rising speed when changing from 50% relative humidity to 55% relative humidity in 1 minute is assumed to be 5%/1 minute.

In the 1 st judgment, the urination judging unit 5 may use the rate of rise of the absolute humidity as an index instead of the rate of rise of the relative humidity. Preferably, the rate of rise in absolute humidity is 1.5g/m every 1 minute ³ Above, i.e. absolute humidity (1.5 g/m) ³ ) When 1 minute or more, it is judged that the 1 st judgment is satisfiedBreaking the reference. By detecting urination with the abrupt rise in humidity at such a rise rate as a reference, the difference between the change in humidity due to external environment or contact and the change in humidity due to urination is made more obvious, and erroneous detection of a change in humidity not due to urination as urination can be prevented more reliably. From this viewpoint, the rise rate of the humidity used as the 1 st judgment reference for judging that urination is present is preferably 1.5g/m per 1 minute of absolute humidity rise ³ Above, and more preferably 2.0g/m ³ Above and 25g/m ³ Hereinafter, it is more preferably 2.5g/m ³ Above and 25g/m ³ The following is given.

In the judgment of the 2 nd, the urination judging unit 5 preferably judges that the 2 nd judgment criterion is satisfied when the rising speed of the temperature is 0.2 ℃ or higher every 1 minute, that is, 0.2 ℃/1 minute or higher. By detecting urination with such a sharp temperature rise in the rising speed as a reference, the difference between the temperature change due to the outside air temperature or contact and the temperature change due to urination is made more obvious, and erroneous detection of a temperature change other than urination as urination can be prevented more reliably. From this viewpoint, the rate of rise of the temperature used as the 2 nd judgment reference for judging that urination is present is preferably 0.2 ℃/1 minute or more, more preferably 0.25 ℃/1 minute or more, still more preferably 0.25 ℃/1 minute or more and 5 ℃/1 minute or less.

In the case where the diaper has absorbed urine, there is a case where the relative humidity of the outer surface of the diaper becomes high and a high state is maintained due to the urine that has been absorbed. In this case, it may be difficult to determine urination 2 nd and later by using the relative humidity. At this time, urine is excreted from the inside of the body, and therefore urine is excreted at the same temperature as the body temperature, and the temperature and humidity rise simultaneously, so that a change in relative humidity is not easily observed. Since the absolute humidity of the outer surface of the diaper is greatly increased to a level equal to or higher than the rising level of the relative humidity, the determination can be made by using the rising rate of the absolute humidity.

Table 1 shows the rate of rise of the temperature from the 1 st to the 3 rd urination in the graph shown in fig. 5. As shown in table 1, the rising speed of the temperature was the 1 st fastest, and decreased as the number of urination increased. The reason for this is that the more the number of urination, the slower the transfer of temperature to the outer surface of the diaper, which means that the lower the rate of temperature rise, the less the residual urine absorption of the diaper.

The 2 nd criterion for detecting urination 2 or later can be set to a predetermined range of the temperature rise rate by detecting the decrease in the temperature rise rate with an increase in the number of urination. For example, it can be determined that urination has occurred after the 2 nd and 3 rd times when the temperature rise rates at the 2 nd and 3 rd times of urination shown in table 1 are 0.64 ℃/min and 0.27 ℃/min, and thus the relative humidity is 75% or more, and the rise temperature is 0.2 ℃/1 min to 1.3 ℃/1 min.

The relative humidity was 75% as a 1 st judgment reference. The relative humidity is suitably based on a uniform value as such. Regarding absolute humidity, when the temperature changes, a value as a reference for determining high humidity changes with temperature.

On the other hand, in the case of detecting urination 2 or later times, for example, the 2 nd or 3 rd time of urination by using the rising speed of the humidity, it is preferable to use the absolute humidity as the 1 st judgment criterion because the humidity can be detected with high accuracy.

TABLE 1

It is also preferable to use a case where the rising speed of the temperature decreases with an increase in the number of urination or the total absorption amount, and if the rising speed of the temperature is equal to or lower than a predetermined value, it is known that the residual urine absorption capacity of the diaper decreases, and a warning is issued that the diaper change is recommended. For example, the urination detecting device of the present invention preferably includes a warning means for warning the change of the diaper when the relative humidity is equal to or higher than a predetermined value and the temperature rise rate is equal to or lower than a predetermined value, as a component of the urination judging unit or as a component added thereto. The warning means for warning the change of the diaper preferably issues a warning for warning the change of the diaper when the relative humidity is 75% or more and the temperature of the diaper rises to 0.2 ℃/1 minute or more and 1 ℃/1 minute or less. The conditions for giving a warning may be such that the relative humidity is 75% or more, and the temperature rise is 0.2 ℃/1 minute or more and 0.5 ℃/1 minute or less.

The urination display unit 58 can be a warning unit for prompting the change of the diaper by displaying the number of urination or adding the content for prompting the change of the diaper. The warning for prompting the replacement of the diaper is not limited to the content for prompting the replacement directly, and may be a standard for displaying only the number of urination or the total urine amount absorbed. The warning for reminding the user to change the diaper may be displayed on a screen by characters, symbols, colors, or the like, or may be notified by sound, vibration, or the like.

The acquisition interval of the humidity data used to determine the rate of rise of the humidity is preferably 2 minutes or less, more preferably 1 minute or less, further preferably 1 second or more, more preferably 10 seconds or more, further preferably 1 second or more and 2 minutes or less, further preferably 1 second or more and 1 minute or less, further preferably 10 seconds or more and 1 minute or less.

The interval of acquisition of temperature data used to determine the rate of temperature rise is preferably 2 minutes or less, more preferably 1 minute or less, further preferably 1 second or more, more preferably 10 seconds or more, further preferably 1 second or more and 2 minutes or less, more preferably 1 second or more and 1 minute or less, further preferably 10 seconds or more and 1 minute or less.

The acquisition interval of the humidity data may be the same as or different from the acquisition interval of the temperature data.

Fig. 7 is a graph showing the difference between the value obtained at the previous data acquisition and the value obtained at the next data acquisition as the change amount (RH% or c) per 1 minute, divided by the value obtained at the acquisition interval, for both the temperature data and the humidity data, which are set to 10 seconds. In this way, when the data acquisition interval is short, the change amount per unit time clearly shows the rise and fall not only at the time of the first urination but also at the time of the 2 nd urination, and the detection accuracy of the urination after the 2 nd urination is improved for either the temperature or the relative humidity.

Preferably, the data acquisition interval is an interval between time points at which 2 temperatures or humidities used for obtaining the rising speed of the temperatures or humidities are observed, and when appropriate values at 2 time points are picked up from continuous data obtained when the temperatures or humidities are continuously monitored, the rising speed of the temperatures or humidities may be obtained from the values at 2 time points and the time interval.

Fig. 7 shows a set value for determining whether the 1 st criterion is satisfied or not and a set value for determining whether the 2 nd criterion is satisfied or not in such a manner that the positions of the set values in the vertical direction of the graph are aligned. The two setting values are set to values exceeding the observable fluctuation of the baseline at the time of non-urination, and when the rising speeds of the temperature and the humidity exceed the setting values, urination is detected by the urination detecting unit 56, whereby urination can be detected with high accuracy without erroneous detection not only at the time of primary urination but also at the time of the 2 nd urination shown on the right side of fig. 7.

The urination detecting device 1 of the present embodiment includes, in the main body device 2, the sampling time generation unit 51, the temperature and humidity data sampling units 52 and 62, the temperature data holding memory 53, the humidity data holding memory 63, the temperature change detecting unit 54, the humidity change detecting unit 64, and the urination detecting unit 56, which constitute the urination judging unit 5, and a power supply unit (not shown) for supplying power necessary for these units is also provided in the main body device 2. By providing the sampling time generation unit, the data sampling unit, the data holding memory, the change detection unit for one or both of temperature and humidity, the urination detection unit, and the power supply unit in the main body device 2 attached to the outer surface of the diaper, for example, a power supply line for connecting the main body device 2 to the power supply unit is not required, and it is not easy to restrict the movement of the wearer of the diaper to which the main body device 2 is attached. Thus, for example, data on urination can be acquired under conditions close to the daily living environment, and for example, the time for changing a diaper can be predicted and managed more accurately.

The main body device of the present invention preferably includes a sampling time generation unit 51, temperature and humidity data sampling units 52 and 62, a temperature data holding memory 53, a humidity data holding memory 63, a device (not shown) capable of communicating with the outside, and a power supply unit (not shown) for supplying power necessary for them, which constitute the urination judging unit 5, in the main body device 2 attached to the outer surface of the diaper. The main body device 2 includes a sampling time generation unit, a data sampling unit, a data holding memory, a device capable of communicating with the outside, and a power supply unit, and the necessary data is transmitted wirelessly to an auxiliary device capable of communicating with the main body device 2, so that the CPU, a storage device, and the like included in the auxiliary device function as a change detection unit, a urination display unit 58, and the like of one or both of temperature and humidity, thereby suppressing a situation in which the movement of the wearer of the diaper to which the main body device 2 is attached is restricted.

From the viewpoint of enabling detection of urination based on a change in humidity caused by urination, it is preferable that the housing body 7 has ventilation portions 75, 76 in an inner wall body 71 forming a surface on the side contacting the outer surface of the diaper and an outer cover 72 located on the opposite side to the side contacting the outer surface of the diaper, respectively. By measuring the humidity by the humidity sensor 4 in the housing 7 provided with the ventilation portions 75 and 76, the humidity change can be measured while eliminating the influence of the external environment by taking in the humidity from the outer surface of the diaper into the housing 7, and the humidity decrease after the humidity rise can occur relatively early. Further, dew condensation in the storage body 7 can be prevented from occurring, and humidity can be prevented from being difficult to measure.

Thus, urination after the 2 nd time can be easily detected based on the humidity change or the humidity change and the temperature change. The material for forming the housing 7 may be plastic, metal, ceramic, or the like, but is preferably plastic.

By measuring the humidity by the humidity sensor 4 in the housing 7 provided with the ventilation portions 75 and 76, urination of the 2 nd and subsequent times can be measured by the humidity sensor 4 alone. For example, in the example shown in fig. 7, by setting the set value for the 1 st judgment criterion at the set value position shown in fig. 7, when the change rate of humidity exceeds the set value, it is possible to judge that urination is present only in this way, and in this case, it is also possible to judge urination 2 nd and later with high accuracy.

In either the case where urination is determined only by the 1 st determination based on humidity or the case where urination is determined when both the 1 st determination based on humidity and the 2 nd determination based on temperature satisfy the determination criteria, the housing 7 preferably has any one or more of the following features (1) to (4) from the viewpoint of improving the accuracy of the determination of humidity.

(1) The moisture discharge portion 76 formed in the outer cover 72 and the moisture introduction portion 75 formed in the inner wall body 71 are ventilation portions formed of through holes, and the opening area ratio of the through holes 76 formed in the outer cover 72 is equal to or smaller than the opening area ratio of the through holes 75 formed in the inner wall body 71. With this configuration, both the availability of moisture in the storage body 7 and the promotion of the decrease in humidity after the increase in humidity due to urination are easily achieved, and the detection accuracy of urination is improved. From the viewpoint of further improving the effect, the opening area ratio of the through-hole 76 formed in the outer cover 72 is preferably lower than the opening area ratio of the through-hole 75 formed in the inner wall body 71.

From the viewpoint of further improving the above-described effects, the opening area ratio is preferably in the following range.

The ratio of the opening area ratio of the through hole 76 formed in the outer cover 72 to the opening area ratio of the through hole 75 formed in the inner wall body 71 (outer cover 72/inner wall body 71) is preferably 10% or more, more preferably 30% or more, further preferably 100% or less, more preferably 80% or less, further preferably 10% or more and 100% or less, more preferably 30% or more and 80% or less.

The opening area ratio of the through hole 75 formed in the inner wall body 71 is preferably 1% or more, more preferably 3% or more, further preferably 50% or less, more preferably 30% or less, further preferably 1% or more and 50% or less, more preferably 3% or more and 30% or less.

The opening area ratio of the through hole 76 formed in the outer cover 72 is preferably 0.1% or more, more preferably 1% or more, further preferably 30% or less, more preferably 10% or less, further preferably 0.1% or more and 30% or less, more preferably 1% or more and 10% or less.

The opening area ratio (%) is a value expressed as a percentage of the total area of the through holes (ventilation portions) to the total area of the surface (including the area of the ventilation portions) with respect to each of the outer cover 72 and the inner wall body 71.

(2) A part of the housing 7 is formed of a moisture-permeable material. For example, in place of the ventilation portions formed by the through holes, ventilation portions formed by a moisture-permeable material (moisture-permeable material) may be provided at positions where the ventilation portions 75, 76 formed by the through holes are provided in the housing body 7 shown in fig. 1. The moisture-permeable material is a material that allows moisture to pass through, and examples thereof include mesh sheets, nonwoven fabrics, water-repellent sheets having fine pores, and breathable sheets. The "fine pores" are voids between fibers constituting the water repellent sheet, and are formed by hole forming processing using a cutting device or the like, except for holes formed in the water repellent sheet. By forming the ventilation portion formed of a moisture-permeable material in a part of the housing body 7, the measurement accuracy of humidity is improved, and also, moisture or foreign matter can be prevented from entering the housing body 7 from the outside.

The moisture permeability of the moisture permeability material, for example, the moisture permeability measured according to JIS Z0208 cup method is preferably 24g/m ² 24Hr or more, more preferably 48g/m ² 24Hr or more, and 2400g/m is preferable ² 24Hr or less, more preferably 1200g/m ² 24Hr or less, and preferably 24g/m ² 24Hr or higher and 2400g/m ² 24Hr or less, more preferably 48g/m ² 24Hr or higher and 1200g/m ² 24Hr or less.

(3) The outer cover 72 and the inner wall body 71 are respectively formed with ventilation portions made of a breathable material, and the ventilation portions of the inner wall body 71 have higher moisture permeability than the ventilation portions of the outer cover 72. By making the ventilation portion of the inner wall 71 higher in moisture permeability than the ventilation portion of the outer cover 72, the accuracy of detecting changes in humidity is improved. The moisture permeability can be determined by using the moisture permeability measured according to JIS Z0208 cup method.

From this viewpoint, the moisture permeability of the ventilation portion of the inner wall body 71 is preferably 2 times or more, more preferably 3 times or more, further preferably 100 times or less, more preferably 10 times or less, further preferably 2 times or more and 100 times or less, more preferably 3 times or more and 10 times or less, the moisture permeability of the ventilation portion of the outer cover 72.

(4) In a part of the housing 7, it is preferable that a ventilation portion formed of a material having water repellency and moisture permeability is provided in a part of each of the outer cover 72 and the inner wall 71. A moisture permeability of 24g/m as measured by JIS Z0208 cup method of a material having water repellency and moisture permeability ² 24Hr or more. As the moisture-proof and moisture-permeable material, a water-proof nonwoven fabric, a moisture-permeable and liquid-impermeable film, such as a microporous film, or the like is preferably used. The microporous film is obtained by melt-kneading a hydrophobic thermoplastic resin, a fine inorganic filler such as calcium carbonate, or an organic polymer that is not compatible with the thermoplastic resin to form a film, and uniaxially or biaxially stretching the film. Examples of the water-repellent nonwoven fabric include a nonwoven fabric of water repellent raw cotton and a nonwoven fabric which has been water repellent by dense surface irregularities.

In addition, when the temperature of the surface facing the outer surface S1 of the diaper is measured by the main body device 2, it is preferable that the main body device 2 includes a temperature transmission member (not shown) for transmitting the temperature of the outer surface S1 of the diaper to the temperature sensor 3. For example, the temperature transmission member is disposed so as to penetrate the center of the through hole formed in the inner wall body 71, and when the main body device 2 is attached to the diaper outer surface S1, the other part of the temperature transmission member can be brought into contact with the diaper outer surface S1 by bringing a part of the temperature transmission member into contact with the temperature sensor. The temperature transmission member is preferably made of a material having high thermal conductivity, and is preferably made of a metal having relatively high thermal conductivity such as stainless steel, copper, or aluminum, or a ceramic such as alumina. The thermal conductivity of the temperature transmission member is preferably 20W/mK or more, more preferably 100W/mK or more.

The temperature transmission member may be a gel for a coolant or the like. Examples of the gelling agent include a structure in which a polymer film is coated with a gelling agent in which a solvent is impregnated into a polymer absorber.

By disposing the temperature transmission member, the heat of the outer surface of the diaper can be easily transmitted to the temperature sensor, the heat of the outer surface S1 of the diaper can be easily detected, and the influence on urination detection due to an external temperature change can be reduced.

As shown in fig. 1, the main body device 2 is preferably provided with a fastening member 73 for fastening to the outer surface of the diaper on the surface opposite to the outer surface of the diaper. The fixing member 73 may be an adhesive layer formed by applying an adhesive, a male member of a mechanical surface fastener, or the like. The method of attaching the main body device 2 to the outer surface S1 of the diaper is not particularly limited, and examples thereof include a method of fixing with an adhesive tape, a method of fixing with a stretchable net, a method of pressing with a stretchable tubular fixing member attached to the periphery of the waist, and the like. Preferably removably secured to the outer surface of the diaper.

The urination detection device 1 according to the above embodiment is used to measure the humidity of the outer surface of the diaper, or the humidity and temperature of the outer surface of the diaper, by fixing the body device 2 to the outer surface of the diaper at the urination site, and the urination detection method for determining that urination is present when the rising speed of the humidity, or the rising speed of the humidity and the rising speed of the temperature exceed the set values is an example of the preferred embodiment of the urination detection method according to the present invention, and the preferred configuration and description of the urination detection device 1 are applicable to the urination detection method according to the present invention.

The diaper to which the body device of the urination detecting device of the present invention is attached or the diaper in the urination detecting method of the present invention preferably includes the absorber 14 and the moisture-permeable leakage preventing sheet disposed on the outer surface side (non-skin-facing surface side) of the absorber 14. The portion of the outer surface S1 of the diaper where the main body device 2 is attached and the leakage preventing sheet having moisture permeability overlap is preferable from the viewpoint of: releasing moisture from the outer surface of the diaper at the time of urination, it is easy to detect a change in humidity caused by urination; the humidity and temperature of the outer surface are efficiently reduced before the next urination, and thus the next urination and the urination can be easily detected.

As the moisture-permeable leakage preventing sheet, a moisture-permeable and liquid-impermeable film such as a microporous film or the like is preferably used. The microporous film is obtained by melt-kneading a hydrophobic thermoplastic resin, a fine inorganic filler such as calcium carbonate, or an organic polymer that is not compatible with the thermoplastic resin to form a film, and uniaxially or biaxially stretching the film.

It is also preferable that the portion where the main body device 2 is attached be displayed by printing, disposing a member to which the fastening member is easily fastened, or the like on the diaper where the main body device 2 is attached.

The urination detecting device of the present invention may preferably include a body device including a 1 st urination detecting unit for detecting urination based on humidity or a change in humidity and humidity, and a 2 nd urination detecting unit for detecting urination by using an optical urination detecting device.

Examples of the optical urination detecting device include the following devices: the diaper comprises an illumination unit and an optical sensor, and is configured such that light irradiated from the illumination unit is reflected on the outer surface of a urination site of the diaper, and the reflected light is input to the optical sensor, and changes in color or the like occurring in the urination site due to urination are optically detected to detect urination. When urination is detected by the 1 st urination detecting unit and urination is also detected by the optical urination detecting device, urination is detected, and thus urination can be detected with high accuracy by further suppressing erroneous detection. In order to change the color or the like at the urination site due to urination, it is preferable to dispose an indicator that changes the color by contact with urine on the absorbent article.

The present invention has been described above based on preferred embodiments thereof, but the present invention is not limited to the above embodiments.

For example, the urination detecting device may be constituted only by a main body device having a urination determining section, but the function of the urination determining section may be shared by the main body device and the auxiliary device. For example, in the urination detecting devices of embodiments 1 and 2, the urination determining unit 5 and the power supply unit such as a battery are disposed in the main body device 2, but the whole or a part of the function of the urination determining unit 5 may be provided in an auxiliary device capable of communicating with the main body device 2. In this case, a communication unit capable of transmitting data wirelessly with an auxiliary device using a wire, wi-Fi (registered trademark), or the like may be provided in the main body device 2, and the data of the temperature or humidity from the temperature sensor or the humidity sensor may be output to the auxiliary device in which a necessary application or program is installed, so that the auxiliary device may perform the judgment of the urination detecting unit 56 and display of the judgment result. The auxiliary device may be configured to perform a function other than the urination display means in the urination determination unit 5. The auxiliary device is, for example, a mobile terminal such as a smart phone, a desktop or laptop personal computer, or the like. The battery included in the power supply unit is preferably a rechargeable battery (2-time battery) such as a lithium ion battery or a nickel metal hydride battery, but may be a dry battery or a hydrogen battery which cannot be charged.

The shape of the main body 2 may be changed as appropriate, and for example, a planar shape may be a polygonal shape such as an oval, triangle, or quadrangle, or a heart shape of the poker, instead of a circular shape. The body device 2 is preferably flat with a height T smaller than the diameter in plan view or the equivalent circular diameter, but may be non-flat. Instead of the dome shape, the outer cover may have a hat shape including a dome-shaped portion and a flat portion extending outward from the periphery of the portion, a cylindrical body having a flat top surface, or the like. The top view shape of the inner wall body may or may not coincide with the top view shape of the outer cover. In the latter case, for example, a surface of the main body device 2 opposed to the outer surface S1 of the diaper 10 is formed of an inner side wall body in contact with the outer surface S1 and a step surface located farther from the outer surface S1 than the inner side wall body.

The shape and the formation position of the ventilation portion as the through hole, the ventilation portion formed of the moisture-permeable material, and the ventilation portion formed of the water-resistant and moisture-permeable material can be appropriately changed. Fig. 9 shows another example of the shape and formation position of these ventilation portions. Fig. 9 (a) shows an example in which a ventilation portion 76 formed of a through hole is provided in the outer cover 72 covering the side opposite to the side in contact with the outer surface of the diaper, fig. 9 (b) shows an example in which a ventilation portion 76 formed of a moisture-permeable material or a water-repellent and moisture-permeable material is provided in the outer cover 72, and fig. 9 (c) and (d) show an example in which a ventilation portion 75 is provided in the inner wall 71 forming the side in contact with the outer surface of the diaper.

Further, if it is determined that urination is occurring based on a simultaneous occurrence of a change in temperature and a change in humidity, the detection reliability of urination is improved, and thus, it is not necessary to form ventilation portions in both the outer cover 72 and the inner wall 71, and for example, only the inner wall 71 of the outer cover 72 and the inner wall 71 may have ventilation portions 75.

In the temperature change detection and humidity change detection unit in the above embodiment, the temperature and humidity change accompanying urination is detected based on whether or not the rate of change in temperature and the rate of change in humidity satisfy predetermined set values, but for example, when the humidity exceeds a predetermined value, for example, 70% relative humidity, the 1 st judgment to cause the change in humidity accompanying urination may be made. Further, the detection of primary urination may be different from the detection method of the second and subsequent times. The set value for the 1 st judgment reference or the 2 nd judgment reference may be changed according to the number of urination, based on the urination number information stored in the urination number detection number memory 57.

The above-described embodiments of the present invention further disclose a urination detecting device or a urination detecting method as follows.

＜1＞

A urination detecting device having a body device with a humidity sensor mounted on the outer surface of a diaper,

A urination judging unit is provided in the main body device or in an auxiliary device capable of communicating with the main body device, and records a change in humidity of the outer surface of the diaper in a state in which the main body device is attached to the outer surface of the diaper, and can detect that urination has occurred 2 nd and subsequent times on the same diaper based on the change in humidity.

＜2＞

The urination detecting device according to claim 1, wherein,

the main body device is internally provided with the humidity sensor and the temperature sensor,

the urination determining unit also records a change in temperature of the outer surface of the diaper, and determines that urination is present when a predetermined change is measured in both the humidity and the temperature of the outer surface of the diaper.

＜3＞

The urination detecting device according to claim 1 or 2, wherein,

the urination determining unit also records a change in temperature of the outer surface of the diaper, and determines that urination has occurred after the 1 st urination, when a predetermined change is measured in both the humidity and the temperature of the outer surface of the diaper, respectively.

＜4＞

The urination detecting device according to claim 1 or 2, wherein,

the urination determining unit also records a change in temperature of the outer surface of the diaper, and determines that urination has occurred 2 nd and subsequent times when the relative humidity of the outer surface of the diaper is 75% or more and a predetermined change is measured in temperature of the outer surface.

＜5＞

The urination detection device according to claim 2 or 3, wherein,

the urination determining unit also records a change in temperature of the outer surface of the diaper, and determines that urination has occurred 2 nd and subsequent times when the absolute humidity and the temperature of the outer surface of the diaper are simultaneously increased.

＜6＞

The urination detection device according to any one of < 2 > to < 5 >, wherein,

the predetermined change in the humidity is an increase in relative humidity at a rate of 3%/1 minute or more.

＜7＞

The urination detecting device according to claim 6, wherein,

the rise rate is a rise in relative humidity of 4%/1 min to 50%/1 min.

＜8＞

The urination detection device according to any one of < 2 > to < 7 >, wherein,

the predetermined change in the humidity was a rise rate of (1.5 g/m ³ ) An absolute humidity rise of 1 minute or more.

＜9＞

The urination detection device according to any one of < 6 > to < 8 >, wherein,

the acquisition interval of the humidity data is 2 minutes or less, and the rising speed of the humidity is calculated from the difference between the humidity data and the humidity data obtained in the previous time.

＜10＞

The urination detecting device according to claim 9, wherein,

the acquisition interval of the humidity data is preferably 2 minutes or less, more preferably 1 second or more, still more preferably 10 seconds or more, still more preferably 1 second or more and 2 minutes or less, still more preferably 1 second or more and 1 minute or less, still more preferably 10 seconds or more and 1 minute or less.

＜11＞

The urination detection device according to any one of < 2 > to < 10 >, wherein,

the predetermined change in the temperature is a temperature increase having a rate of increase of 0.2 ℃/1 minute or more.

＜12＞

The urination detecting device according to claim 11, wherein,

the rising speed is more than 0.2 ℃/1 minute and less than 5 ℃/1 minute.

＜13＞

The urination detection device according to claim 11 or 12, wherein,

the interval of acquisition of temperature data is 2 minutes or less, and the rate of rise of the temperature is calculated from the difference from the temperature at the time of the previous acquisition.

＜14＞

The urination detecting device according to claim 13, wherein,

the interval of acquisition of the temperature data is preferably 1 minute or less, more preferably 1 second or more, still more preferably 10 seconds or more, still more preferably 1 second or more and 2 minutes or less, still more preferably 1 second or more and 1 minute or less, still more preferably 10 seconds or more and 1 minute or less.

＜15＞

The urination detection device according to any one of < 1 > to < 14 >, wherein,

comprises a warning means for prompting the change of a diaper when the relative humidity is a predetermined value or more and the temperature rise rate is a predetermined value or less by utilizing the fact that the temperature rise rate at the time of urination is reduced with the increase of the number of urination or the total absorption amount,

the conditions for issuing the warning are:

the relative humidity is 75% or more, and the temperature rise rate is 0.2deg.C/1 min or more and 1deg.C/1 min or less, or

The relative humidity is 75% or more, and the temperature rise rate is 0.2 ℃ per 1 minute or more and 0.5 ℃ per 1 minute or less.

＜16＞

The urination detection device according to any one of < 1 > to < 15 >, wherein,

the main body device includes a housing body in which at least the humidity sensor is disposed, and the housing body is formed with: a moisture introducing portion for introducing moisture discharged from the outer surface of the diaper; and a moisture discharge unit for discharging moisture, which has contacted the humidity sensor in the housing, to the outside.

＜17＞

The urination detecting device according to claim 16, wherein,

the storage body has: an inner side wall body forming a surface on a side contacting an outer surface of the diaper; and an outer cover covering the side opposite to the side contacting the outer surface of the diaper, wherein the moisture inlet is formed on the inner side wall body, and the moisture outlet is formed on the outer cover.

＜18＞

The urination detecting device according to claim 17, wherein,

the moisture introducing portion and the moisture discharging portion are through holes formed in the housing body, and an opening area ratio of the through holes formed in the outer cover is equal to or smaller than an opening area ratio of the through holes formed in the inner wall body.

＜19＞

The urination detecting device according to claim 18, wherein,

the ratio of the opening area ratio of the through hole formed in the outer cover to the opening area ratio of the through hole formed in the inner wall body is 10% or more, preferably 30% or more, and further 100% or less, preferably 80% or less, and further 10% or more and 100% or less, preferably 30% or more and 80% or less.

＜20＞

The urination detecting device according to claim 18, wherein,

the opening area ratio of the through hole formed in the inner wall body is 1% or more, preferably 3% or more, and is 50% or less, preferably 30% or less, and is 1% or more and 50% or less, preferably 3% or more and 30% or less.

＜21＞

The urination detecting device according to claim 18, wherein,

the opening area ratio of the through hole formed in the outer cover is 0.1% or more, preferably 1% or more, and is 30% or less, preferably 10% or less, and is 0.1% or more and 30% or less, preferably 1% or more and 10% or less.

＜22＞

The urination detection device according to any one of < 16 > to < 21 >, wherein,

one or both of the moisture introducing portion and the moisture discharging portion are ventilation portions provided with a moisture permeable material.

＜23＞

The urination detecting device according to claim 22, wherein,

the moisture permeability of the moisture permeable material was 24g/m as measured according to JIS Z0208 cup method ² 24Hr or more, more preferably 48g/m ² 24Hr or more, and 2400g/m is preferable ² 24Hr or less, more preferably 1200g/m ² 24Hr or less, and preferably 24g/m ² 24Hr or higher and 2400g/m ² 24Hr or less, more preferably 48g/m ² 24Hr or higher and 1200g/m ² 24Hr or less.

＜24＞

the moisture permeability of the moisture introducing portion is higher than the moisture permeability of the moisture discharging portion.

＜25＞

The urination detecting device according to claim 24, wherein,

The moisture permeability of the moisture introducing portion measured according to JIS Z0208 cup method is 2 times or more, preferably 3 times or more, further 100 times or less, preferably 10 times or less, further 2 times or more and 100 times or less, preferably 3 times or more and 10 times or less, of the moisture discharging portion.

＜26＞

one or both of the moisture introduction portion and the moisture discharge portion are ventilation portions provided with a material having water repellency and moisture permeability.

＜27＞

The urination detection device according to any one of < 1 > to < 26 >, wherein,

a fastening member for fastening to the outer surface of the diaper is provided on the main body device.

＜28＞

The urination detection device according to any one of < 1 > to < 27 >, wherein,

also comprises an optical urination detection device.

＜29＞

The urination detection device according to any one of < 1 > to < 28 >, wherein,

the main body device includes a sampling time generation unit, a data sampling unit, a data holding memory, a change detection unit for one or both of temperature and humidity, a urination detection unit, and a power supply unit.

＜30＞

The urination detection device according to any one of < 1 > to < 29 >, wherein,

the main body device includes a sampling time generation unit, a data sampling unit 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 unit for supplying necessary power.

＜31＞

A urination detecting method measures humidity and temperature of an outer surface of a diaper at a urination site of the diaper, and determines that urination is present when both the humidity and the temperature rise rate exceed respective set values.

Industrial applicability

According to the urination detection device and the urination detection method of the present invention, it is possible to realize a high-precision and sanitary urination detection, and it is possible to detect the 1 st urination and also detect the 2 nd and subsequent urination.

Claims

1. A urination detection device, characterized in that:

a body means having a built-in humidity sensor mounted on the outer surface of the diaper,

2. The urination detection device of claim 1, wherein:

3. The urination detection device according to claim 1 or 2, wherein:

4. The urination detection device according to claim 1 or 2, wherein:

5. A urination detection device as defined in claim 2 or 3, wherein:

6. The urination detection device according to any one of claims 2 to 5, wherein:

7. The urination detection device of claim 6, wherein:

the rise rate is a rise in relative humidity of 4%/1 min to 50%/1 min.

8. The urination detection device according to any one of claims 2 to 7, wherein:

9. The urination detection device according to any one of claims 6 to 8, wherein:

10. The urination detection device of claim 9, wherein:

the acquisition interval of the humidity data is 1 second or more and 2 minutes or less.

11. The urination detection device according to any one of claims 2 to 10, wherein:

12. The urination detection device of claim 11, wherein:

the rising speed is more than 0.25 ℃/1 minute and less than 5 ℃/1 minute.

13. The urination detection device according to claim 11 or 12, wherein:

14. The urination detection device of claim 11, wherein:

the interval of acquisition of the temperature data is 1 second or more and 2 minutes or less.

15. The urination detection device according to any one of claims 1 to 14, wherein:

the diaper changing device includes a warning means for warning a change of a diaper when the relative humidity is a predetermined value or more and the temperature rise rate is a predetermined value or less, by using a case where the temperature rise rate at the time of urination decreases with an increase in the number of times of urination or the total absorption amount.

16. The urination detection device according to any one of claims 1 to 15, wherein:

17. The urination detection device of claim 16, wherein:

18. The urination detection device of claim 17, wherein:

19. The urination detection device of claim 18, wherein:

The ratio of the opening area ratio of the through hole formed in the outer cover to the opening area ratio of the through hole formed in the inner wall body is 10% to 100%.

20. The urination detection device of claim 18, wherein:

the opening area ratio of the through hole formed in the inner wall body is 1% to 50%.

21. The urination detection device of claim 18, wherein:

the opening area ratio of the through hole formed in the outer cover is 0.1% or more and 30% or less.

22. The urination detection device according to any one of claims 16 to 21, wherein:

23. The urination detection device of claim 22, wherein:

the moisture permeability of the moisture permeable material was 24g/m as measured according to JIS Z0208 cup method ² 24Hr or higher and 2400g/m ² 24Hr or less.

24. The urination detection device according to any one of claims 16 to 21, wherein:

25. The urination detection device of claim 24, wherein:

the moisture permeability of the moisture inlet portion measured according to JIS Z0208 cup method is 2 times or more and 100 times or less of the moisture permeability of the moisture outlet portion.

26. The urination detection device according to any one of claims 16 to 21, wherein:

27. The urination detection device of any one of claims 1 to 26, wherein:

28. The urination detection device of any one of claims 1 to 27, wherein:

also comprises an optical urination detection device.

29. The urination detection device of any one of claims 1 to 28, wherein:

30. The urination detection device of any one of claims 1 to 29, wherein:

31. A urination detection method, characterized in that:

the humidity and temperature of the outer surface of the diaper at the urination site of the diaper are measured, and urination is determined when the rising speeds of the humidity and the temperature exceed the respective set values.