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WO2024262079A1 - Dispositif de détection d'excrétion - Google Patents

Dispositif de détection d'excrétion Download PDF

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Publication number
WO2024262079A1
WO2024262079A1 PCT/JP2024/002869 JP2024002869W WO2024262079A1 WO 2024262079 A1 WO2024262079 A1 WO 2024262079A1 JP 2024002869 W JP2024002869 W JP 2024002869W WO 2024262079 A1 WO2024262079 A1 WO 2024262079A1
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WO
WIPO (PCT)
Prior art keywords
temperature
temperature sensor
excretion
control unit
detection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/002869
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English (en)
Japanese (ja)
Inventor
信宏 伊藤
靖三 瀬戸口
靖久 山本
道則 野▲崎▼
貴士 西東
宏明 井手
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of WO2024262079A1 publication Critical patent/WO2024262079A1/fr
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/047—Beds for special sanitary purposes, e.g. for giving enemas, irrigations, flushings

Definitions

  • the object of the present invention is therefore to provide an excretion detection device that can more appropriately detect excretion with low power consumption.
  • the excretion detection device comprises a first temperature sensor, a second temperature sensor, a control unit, a first switch, and a second switch.
  • the first temperature sensor is arranged in a first area where the person to be detected for excretion may move, and each of the first temperature sensors comprises a plurality of temperature detection elements arranged in an array.
  • the second temperature sensor is arranged in a second area where the person to be detected for excretion may move, and each of the second temperature detection elements comprises a plurality of temperature detection elements arranged in an array.
  • the control unit detects excretion based on a time change or a distribution change in at least one of the first temperature detection result of the first temperature sensor and the second temperature detection result of the second temperature sensor.
  • the first switch is connected between the first temperature sensor and the control unit, and controls electrical open and close between the first temperature sensor and the control unit.
  • the second switch is connected between the second temperature sensor and the control unit, and controls electrical open and close between the second temperature sensor and the control unit.
  • This invention allows for more accurate detection of excretion with low power consumption.
  • FIG. 1 is a functional block diagram showing an example of the configuration of the excretion detection device according to the first embodiment.
  • the detection device main body 30 includes a plurality of switches 41-43 (switch 41, switch 42, and switch 43), a plurality of AD converters 51-53 (AD converter 51, AD converter 52, and AD converter 53), a control unit 60, a communication unit 70, a clock unit 600, an antenna 700, and a power supply BAT.
  • the plurality of switches 41-43 (switch 41, switch 42, and switch 43), the plurality of AD converters 51-53 (AD converter 51, AD converter 52, and AD converter 53), the control unit 60, the communication unit 70, and the clock unit 600 are each realized by a predetermined electronic circuit, IC, or the like.
  • the plurality of switches 41-43 may be physical switches or electronic switches, and may be any switches that can turn the current-carrying state on (conductive) or off (open).
  • the resistance value of the multiple temperature detection elements St changes according to the temperature near the surface 2101 of the main body 210.
  • the voltage and current according to this resistance value become a temperature detection signal and correspond to the temperature detection result.
  • the multiple temperature detection elements St output their own temperature detection signals.
  • FIGS 3(A) and 3(B) are diagrams showing an example of the arrangement of multiple temperature sensors according to the first embodiment.
  • Figure 3(A) is a plan view
  • Figure 3(B) is a side view.
  • Figures 4(A) and 4(B) are plan views showing an example of a state in which the person to be detected has turned over in his/her sleep.
  • the multiple temperature sensors 21-23 are placed on the surface 801 of the bed (bedding) 80.
  • the surface of each of the multiple temperature sensors 21-23 is approximately parallel to the surface 801 of the bed 80, and the back surface of each of the multiple temperature sensors 21-23 faces and abuts against the surface 801 of the bed 80.
  • One of the multiple temperature sensors 21-23 corresponds to the first temperature sensor, and the other temperature sensor corresponds to the second temperature sensor.
  • the temperature detection signal output by the first temperature sensor corresponds to the first temperature detection result
  • the temperature detection signal output by the second temperature sensor corresponds to the second temperature detection result.
  • the multiple temperature sensors 21-23 are arranged in sequence across the width of the bed 80 (the direction perpendicular to the vertical and thickness directions). For example, in the cases shown in Figures 2(A), 3(A), and 3(B), temperature sensors 21, 22, and 23 are arranged in this order from the left end to the right end of the bed 80. Temperature sensors 21, 22, and 23 may overlap slightly, but it is preferable that they do not overlap.
  • the temperature sensors 21-23 have a temperature detection area in the vertical direction of the bed 80 near the crotch of the person to be detected 90, and a temperature detection area across substantially the entire width of the bed 80 in the width direction. This allows the temperature detection elements St that make up each of the temperature sensors 21-23 to detect the temperature that detects the excretion of the person to be detected 90.
  • the planar area on the temperature sensor that corresponds to the first temperature sensor corresponds to the first area
  • the planar area on the temperature sensor that corresponds to the second temperature sensor corresponds to the second area.
  • the multiple temperature sensors 21-23 are connected to a detection device main body 30, which is placed, for example, next to the bed 80.
  • the switch 41 is connected, for example, between the temperature sensor 21 and the AD converter 51.
  • the switch 41 controls electrical connection and disconnection between the temperature sensor 21 and the AD converter 51 (and thus the control unit 60).
  • the switch 41 may be located between the AD converter 51 and the control unit 60.
  • the switch 43 is connected, for example, between the temperature sensor 23 and the AD converter 53.
  • the switch 43 controls electrical connection and disconnection between the temperature sensor 23 and the AD converter 53 (and thus the control unit 60).
  • the switch 41 may be located between the AD converter 51 and the control unit 60.
  • the temperature sensor 21 outputs the temperature detection signal of each temperature detection element to the AD converter 51 through the switch 41, which is controlled to be conductive.
  • the AD converter 51 converts the analog temperature detection signal into a digital temperature detection result and outputs it to the control unit 60.
  • the temperature sensor 22 outputs the temperature detection signal of each temperature detection element to the AD converter 52 through the switch 42, which is controlled to be conductive.
  • the AD converter 52 converts the analog temperature detection signal into a digital temperature detection result, and outputs it to the control unit 60.
  • the temperature sensor 23 outputs the temperature detection signal of each temperature detection element to the AD converter 53 through the switch 43, which is controlled to be conductive.
  • the AD converter 53 converts the analog temperature detection signal into a digital temperature detection result, and outputs it to the control unit 60.
  • the control unit 60 outputs the excretion detection result to the communication unit 70, which converts the excretion detection result into communication data format and transmits it from the antenna 700 to an external PC, portable information terminal, etc.
  • the control unit 60 controls to open the switch connected to the temperature sensor corresponding to the area above the temperature sensor where it has been determined that the person to be detected 90 is not present. Specifically, when it is determined that the person to be detected 90 is not present in the area above the temperature sensor 21, it controls to open the switch 41 connected to the temperature sensor 21. When it is determined that the person to be detected 90 is not present in the area above the temperature sensor 22, it controls to open the switch 42 connected to the temperature sensor 22. When it is determined that the person to be detected 90 is not present in the area above the temperature sensor 23, it controls to open the switch 43 connected to the temperature sensor 23.
  • the control unit 60 performs such an intermittent determination of the presence or absence of the target person 90 at a predetermined time interval (e.g., every 30 minutes). At this time, for example, the control unit 60 uses the time measured by the timer unit 600.
  • the control unit 60 controls the conduction of the switch 41 to pass a current through the temperature sensor 21 and obtains the temperature detection result from the temperature sensor 21.
  • the control unit 60 controls the conduction of the switch 42 to pass a current through the temperature sensor 22 and obtains the temperature detection result from the temperature sensor 22.
  • the control unit 60 controls the conduction of the switch 43 to pass a current through the temperature sensor 23 and obtains the temperature detection result from the temperature sensor 23.
  • the control unit 60 determines the presence or absence of a person 90 to be detected in the areas corresponding to each of the temperature sensors 21-23 based on the temperature detection results. At this time, the control unit 60 stores a temperature threshold value for determining the presence.
  • the control unit 60 acquires the temperature detected by each of the multiple temperature detection elements St that make up the temperature sensor 21 based on the temperature detection result of the temperature sensor 21. If the temperature detected by a predetermined number (e.g., 1/2 or more or 2/3 or more) of the multiple temperature detection elements St is equal to or greater than the temperature threshold value, it determines that a person to be detected 90 is present in the area corresponding to the temperature sensor 21.
  • a predetermined number e.g., 1/2 or more or 2/3 or more
  • the control unit 60 uses a similar method to determine whether the target person 90 is present in the area corresponding to the temperature sensor 22, and whether the target person 90 is present in the area corresponding to the temperature sensor 23.
  • control unit 60 determines that the person to be detected 90 is present in the area corresponding to the temperature sensor 21, and determines that the person to be detected 90 is not present in the areas corresponding to the temperature sensors 22 and 23, it controls the switch 41 connected to the temperature sensor 21 to be conductive, and controls the switch 42 connected to the temperature sensor 22 and the switch 43 connected to the temperature sensor 22 to be open.
  • control unit 60 This allows the control unit 60 to detect excretion while reducing power consumption by the temperature sensor that is not necessary for detecting excretion.
  • the control unit 60 also intermittently and repeatedly determines whether the person to be detected 90 is present. This makes it possible to more reliably determine whether the person to be detected 90 is present in each area, even if the person to be detected 90 turns over in his/her sleep or moves widthwise on the bed 80 as shown in Figures 4(A) and 4(B). Therefore, the excretion detection device 10 can supply power only to the temperature sensors necessary for detecting excretion, depending on the posture of the person to be detected 90, and suppress the supply of power to temperature sensors not necessary for detecting excretion.
  • control unit 60 can also detect the type of excretion more reliably, and furthermore detect the type of excretion (urine, solid stool with little moisture, loose stool with a lot of moisture), as shown below.
  • Figures 5(A), 5(B), 5(C), and 5(D) show the temperature distribution over time for urine in a supine position.
  • Figure 5(A) shows the start (when urine begins to be released)
  • Figure 5(B) shows 1 minute after the start
  • Figure 5(C) shows 3 minutes after the start
  • Figure 5(D) shows 7 minutes after the start.
  • Figures 6(A), 6(B), 6(C), and 6(D) show the temperature distribution over time for solid stool in a recumbent position.
  • Figure 6(A) shows the start (when solid stool begins to be released)
  • Figure 6(B) shows 1 minute after the start
  • Figure 6(C) shows 3 minutes after the start
  • Figure 6(D) shows 7 minutes after the start.
  • Figures 7(A), 7(B), 7(C), and 7(D) show the temperature distribution over time in the case of soft stool in a lying position.
  • Figure 7(A) shows the start (when soft stool begins to be released)
  • Figure 7(B) shows 1 minute after the start
  • Figure 7(C) shows 3 minutes after the start
  • Figure 7(D) shows 7 minutes after the start.
  • a temperature detection element St is placed in each unit area into which the area is divided, and the temperature is detected for each unit area. The lighter the hatching of the unit area, the lower the detected temperature, and the darker the hatching, the higher the detected temperature.
  • the time change in temperature rise, the size of the area of temperature rise, and the time change in the size of the area of temperature rise are different for urine, solid stool, and loose stool.
  • the time change or distribution change in temperature is different for urine, solid stool, and loose stool.
  • the control unit 60 acquires the temperature change over time or distribution change as shown in each of the figures above while measuring time with the timing unit 600.
  • the control unit 60 detects excretion and determines the type of excretion based on the acquired temperature change over time or distribution change.
  • the excretion detection device 10 can detect excretion more appropriately with low power consumption.
  • FIG. 8 is a flowchart showing an example of a main process of the excretion detection method according to the first embodiment.
  • Fig. 9 is a flowchart showing an example of a specific process of determining an area where a person to be detected is present.
  • Fig. 10 is a flowchart showing an example of a specific process of detecting excretion. Note that some parts of the processes shown in Figs. 8, 9, and 10 have already been explained in the explanation of the above configuration, and only parts that require additional explanation will be explained here.
  • control unit 60 determines the presence region (area) of the person to be detected 90 based on the temperature detection results of the multiple temperature sensors 21-23 (S11).
  • the control unit 60 maintains the conductive state (ON state) of the temperature sensor corresponding to the area in which the person to be detected 90 is present (S12).
  • the control unit 60 detects excretion based on the temperature detection result of the temperature sensor that maintains a conductive state (S13).
  • control unit 60 controls the plurality of switches 41-43 to be open (OFF) (S101).
  • the control unit 60 controls the switch 41 to be conductive (ON control) and controls the switches 42 and 43 to be open (OFF control) (S102).
  • the control unit 60 counts the number N1 of temperature detection elements (sensor elements) that are equal to or higher than the temperature threshold for determining the presence (S103).
  • the control unit 60 determines that the person to be detected 90 is present in the area 1 corresponding to the temperature sensor 21 (S105). If the number N1 is less than the number threshold THn for determining the presence (S104: NO), the control unit 60 determines that the person to be detected 90 is not present in the area 1 corresponding to the temperature sensor 21.
  • the control unit 60 controls the switch 42 to be conductive (ON control) and controls the switches 41 and 43 to be open (OFF control) (S106).
  • the control unit 60 counts the number N2 of temperature detection elements (sensor elements) that are equal to or higher than the temperature threshold for determining the presence (S107).
  • the control unit 60 determines that the target person 90 is present in the area 2 corresponding to the temperature sensor 22 (S109). If the number N2 is less than the number threshold THn for determining the presence (S108: NO), the control unit 60 determines that the target person 90 is not present in the area 2 corresponding to the temperature sensor 22.
  • the control unit 60 controls the switch 43 to be conductive (ON control) and controls the switches 41 and 43 to be open (OFF control) (S110).
  • the control unit 60 counts the number N3 of temperature detection elements (sensor elements) that are equal to or higher than the temperature threshold for determining the presence (S111).
  • the control unit 60 determines that the person to be detected 90 is present in the area 3 corresponding to the temperature sensor 23 (S113). If the number N3 is less than the number threshold THn for determining the presence (S112: NO), the control unit 60 determines that the person to be detected 90 is not present in the area 3 corresponding to the temperature sensor 23.
  • control unit 60 sequentially determines area 1 corresponding to temperature sensor 21, area 2 corresponding to temperature sensor 22, and area 3 corresponding to temperature sensor 23.
  • control unit 60 may determine area 1 corresponding to temperature sensor 21, area 2 corresponding to temperature sensor 22, and area 3 corresponding to temperature sensor 23 in parallel.
  • the control unit 60 detects whether there is a sensor element with a rising temperature (warming) (S302: YES). If there is no sensor element with a rising temperature (warming) (S302: NO), the control unit 60 does not perform an excretion determination (S311).
  • the control unit 60 detects whether the range of temperature rise has expanded. If there is a sensor element with a temperature drop (cooling down) within a predetermined time after the temperature rise (S303: YES), the control unit 60 does not perform an excretion determination (S311).
  • the control unit 60 detects whether or not there is an increase in temperature throughout the entire area. If there is no expansion of the temperature rise range (S304: NO), the control unit 60 detects excretion and determines that it is solid stool (S323).
  • control unit 60 detects excretion and determines that it is loose stool (S321). If there is no temperature rise in the entire area (S305: NO), the control unit 60 detects excretion and determines that it is urine (S322).
  • Fig. 11(A) is an exploded perspective view showing an example of a temperature sensor of the excretion detection device according to the second embodiment
  • Fig. 11(B) is a side view thereof.
  • the excretion detection device according to the second embodiment differs from the excretion detection device 10 according to the first embodiment in the configuration of the temperature sensor.
  • the other configuration of the excretion detection device according to the second embodiment is similar to that of the excretion detection device 10 according to the first embodiment, and a description of similar parts will be omitted.
  • the temperature sensor 21A includes a plurality of temperature detection elements St11, a plurality of temperature detection elements St12, and a plurality of temperature detection elements St13.
  • the multiple temperature detection elements St11 are two-dimensionally arranged parallel to the surface 2101 to form a first arrangement layer.
  • the multiple temperature detection elements St12 are two-dimensionally arranged parallel to the surface 2101 to form a second arrangement layer.
  • the temperature detection elements St13 are two-dimensionally arranged parallel to the surface 2101 to form a third arrangement layer.
  • the first arrangement layer of multiple temperature detection elements St11, the second arrangement layer of multiple temperature detection elements St12, and the third arrangement layer of multiple temperature detection elements St13 are arranged in order in a direction perpendicular to the surface 2101.
  • temperature sensor 21A has multiple temperature detection elements arranged in a three-dimensional manner.
  • the excretion detection device can detect not only two-dimensional temperature distribution, but also three-dimensional temperature distribution.
  • the excretion detection device can detect not only two-dimensional temperature distribution in a plane parallel to the detection target surface, but also temperature distribution in the depth direction of the sensor, which is perpendicular to the detection target surface. This makes it possible to express temperature changes as vectors and determine whether the heat is from the human body or the equipment, thereby enabling excretion detection with improved accuracy.
  • the excretion detection device according to the second embodiment can obtain a more diverse temperature distribution than the excretion detection device 10 according to the first embodiment, improving the accuracy of detecting excretion and the accuracy of detecting the type of excretion.
  • the number of layers in the temperature detection element array is not limited to three, but can be set to any number greater than or equal to two.
  • Fig. 12(A) is a plan view showing an example of a temperature sensor of the excretion detection device according to the third embodiment
  • Fig. 12(B) is a side view thereof.
  • the excretion detection device according to the third embodiment differs from the excretion detection device according to the second embodiment in the configuration of the temperature sensor.
  • the other configuration of the excretion detection device according to the third embodiment is the same as that of the excretion detection device according to the second embodiment, and a description of similar parts will be omitted.
  • the temperature sensor 21B has multiple temperature detection elements St11 and multiple temperature detection elements St12.
  • the multiple temperature detection elements St11 are two-dimensionally arranged parallel to the surface 2101 to form a first arrangement layer.
  • the multiple temperature detection elements St12 are two-dimensionally arranged parallel to the surface 2101 to form a second arrangement layer.
  • the first array layer of multiple temperature detection elements St11 and the second array layer of multiple temperature detection elements St12 are sequentially arranged in a direction perpendicular to the surface 2101.
  • the multiple temperature detection elements St11 constituting the first array layer and the multiple temperature detection elements St12 constituting the second array layer are arranged at different positions when viewed in a direction perpendicular to the surface 2101 (detection target surface). In other words, the temperature detection elements St11 and the temperature detection elements St12 are arranged so as not to overlap each other.
  • temperature sensor 21B can achieve the same effect as temperature sensor 21A while suppressing the difference in thickness between the placement position and non-placement position of the temperature detection element. In other words, temperature sensor 21B can suppress unevenness of surface 2101 compared to temperature sensor 21A. This reduces the discomfort felt by the detection target person 90 when using the excretion detection device.
  • FIG. 13 is a functional block diagram showing an example of the configuration of the excretion detection device according to the fourth embodiment.
  • the excretion detection device 10C according to the fourth embodiment differs from the excretion detection device 10 according to the first embodiment in that it includes a temperature sensor 29o and a detection device main body 30C.
  • the detection device main body 30C differs from the detection device main body 30 in that it includes an AD converter 59 and a control unit 60C.
  • the other configuration of the detection device main body 30C is the same as that of the detection device main body 30, and a description of similar parts will be omitted.
  • Temperature sensor 29o detects the temperature of the space to be detected and outputs the outside air temperature detection result to AD converter 59. Temperature sensor 29o corresponds to the third temperature sensor.
  • the AD converter 59 converts the analog outside air temperature detection result into a digital outside air temperature detection result and outputs it to the control unit 60C.
  • the control unit 60C uses the outside air temperature detection results in addition to the temperature detection results of the multiple temperature sensors 21-23 to determine the presence or absence of the target person 90. Specifically, the control unit 60C performs calculations to suppress the effect of the outside air temperature on the temperature detection results of the multiple temperature sensors 21-23 (the detected temperatures of each temperature detection element).
  • control unit 60C prestores a correction value corresponding to the amount of temperature increase or decrease due to the outside air temperature relative to the temperature detection result. Based on the temperature detection result, the control unit 60C corrects the temperature indicated by the temperature detection result with the correction value. The control unit 60C determines whether or not the target person 90 is present using the corrected temperature detection result, the temperature threshold value for presence determination described above, and the number threshold value for presence determination described above, THn.
  • the excretion detection device 10C can more reliably determine the presence or absence of the person to be detected 90, taking into account the outside air temperature. This allows the excretion detection device 10C to achieve more appropriate power saving.
  • the excretion detection device 10C can also use this correction based on the outside air temperature to detect excretion. This allows the excretion detection device 10C to more appropriately detect excretion.
  • FIG. 14 is a flowchart showing an example of main processes of the excretion detection method according to the fourth embodiment. As with the description of Fig. 8, only parts of the processes shown in Fig. 14 that require additional explanation will be described.
  • control unit 60C observes the outside air temperature (S10).
  • the control unit 60C refers to the outside air temperature and determines the presence area of the person 90 to be detected (which area the person is in) based on the temperature detection results of the multiple temperature sensors 21-23 (S11C).
  • the control unit 60C maintains the conductive state (ON state) of the temperature sensor corresponding to the area in which the person to be detected 90 is present (S12).
  • the control unit 60C references the outside air temperature and detects excretion based on the temperature detection results of the temperature sensor that maintains a conductive state (S13C).
  • [Modification of Temperature Sensor] 15(A), 15(B), and 15(C) are diagrams showing modified examples of the structure in which the temperature sensor is arranged.
  • the structure 200X1 shown in FIG. 15(A) is a flexible cylinder, such as a belly band.
  • Multiple temperature sensors 21-23 are arranged on the cylindrical inner surface of the structure 200X1.
  • the multiple temperature sensors 21-23 are arranged in sequence along the circumferential direction.
  • the structure 200X1 is positioned to cover an area including the crotch 900 and buttocks of the person to be detected 90. This allows the structure 200X1 to keep the multiple temperature sensors 21-23 in contact with the clothing of the person to be detected 90. Therefore, excretion can be detected regardless of the body position of the person to be detected 90, such as when the person to be detected 90 turns over in bed or lies on his/her side.
  • the structure 200X2 shown in FIG. 15(B) is an arc having a predetermined width.
  • Multiple temperature sensors 21-23 are arranged along the inner circumferential surface of the arc of the structure 200X2.
  • the buttocks move in an arc, but because the inner circumferential surface of the structure 200X2 is almost the same as the arc of the orbit of the buttocks, the distance between the multiple temperature sensors 21-23 and the buttocks can always be kept close and approximately constant.
  • the structure 200X3 shown in FIG. 15(C) is in the shape of a chair.
  • the temperature sensors 21-23 are arranged in sequence along the width direction of the seat.
  • Figures 16(A), 16(B), 16(C), and 16(D) are diagrams showing other modified examples of structures in which temperature sensors are arranged.
  • the structure 200Y1 shown in FIG. 16(A) includes a temperature sensor 21, a heat insulator 251, and a cover 252.
  • the temperature sensor 21 has, for example, the configuration shown in FIG. 2(A) and FIG. 2(B) above.
  • An insulator 251 is disposed on the back surface 2102 side of the temperature sensor 21.
  • the insulator 251 has a shape in plan view that is substantially the same as that of the temperature sensor 21. Note that the insulator 251 only needs to be of a size that at least overlaps the multiple temperature detection elements St disposed in the temperature sensor 21, but it is preferable that the insulator 251 be substantially the same as that of the temperature sensor 21.
  • the insulator 251 is made of a material with lower thermal conductivity (highly insulating material) than the main body 210 of the temperature sensor 21.
  • the insulator 251 is made of, for example, a polystyrene panel, polystyrene foam, cork, etc. The lower the thermal conductivity of the insulator 251, the more preferable, and for example, 1 W/mK or less is more preferable.
  • the temperature sensor 21 can detect the temperature with greater accuracy.
  • the cover 252 is bag-shaped and covers the laminate of the temperature sensor 21 and the insulator 251.
  • the cover 252 is made of a material with excellent shock absorption properties. More specifically, the cover 252 is made of a material with higher shock absorption properties than the main body 210 of the temperature sensor 21.
  • a portion of the cover 252 is disposed on the surface 2101 side of the temperature sensor 21. Therefore, when the person to be detected 90 lies down on the structure 200Y1, the cover 252 comes into contact with the person to be detected 90.
  • the cover 252 has high shock absorption properties, so that the body pressure of the person to be detected 90 is dispersed.
  • the structure 200Y1 can prevent bedsores in the person to be detected 90.
  • the structure 200Y1 can also prevent damage to the multiple temperature detection elements St and wiring pattern of the temperature sensor 21 due to body pressure.
  • the cover 252 has low friction. This allows the structure 200Y1 to more reliably prevent bedsores in the detection target person 90.
  • the cover 252 has high thermal conductivity.
  • the thermal conductivity of the cover 252 is preferably, for example, 8 W/mk to 20 W/mk, and preferably high. This allows heat transmitted from the person to be detected 90 (heat used for excretion detection) to be transmitted with low loss (high efficiency) to the temperature detection element St of the temperature sensor 21. Therefore, the temperature sensor 21 can detect temperature with greater accuracy.
  • the cover 252 further has at least one of the following properties: waterproof, antibacterial, deodorizing, and durability, and it is even more preferable that it is easy to wash.
  • the structure 200Y2 shown in FIG. 16(B) includes a temperature sensor 21, a heat insulator 251, and a cushioning material 253.
  • the structure 200Y2 shown in FIG. 16(B) differs from the structure 200Y1 shown in FIG. 16(A) in that the cover 252 is replaced with a cushioning material 253.
  • the other configuration of the structure 200Y2 is similar to that of the structure 200Y1, and a description of similar parts will be omitted.
  • the cushioning material 253 is disposed on the surface 2101 of the temperature sensor 21.
  • the cushioning material 253 covers substantially the entire surface 2101 of the temperature sensor 21. Note that it is sufficient that the cushioning material 253 overlaps at least the multiple temperature detection elements St of the temperature sensor 21 in a plan view.
  • structure 200Y2 can achieve the same effects as structure 200Y1.
  • the structure 200Y3 shown in FIG. 16(C) comprises a temperature sensor 21, a heat insulator 251, a cover 252, and a cushioning material 253.
  • the structure 200Y3 shown in FIG. 16(C) has a configuration that combines the configuration of the structure 200Y1 shown in FIG. 16(A) and the configuration of the structure 200Y2 shown in FIG. 16(B).
  • Each component of the structure 200Y3 is similar to the structures 200Y1 and 200Y2, and a description of similar parts will be omitted.
  • the insulator 251 is disposed on the back surface 2102 of the temperature sensor 21.
  • the buffer material 253 is disposed on the front surface 2101 of the temperature sensor 21.
  • the cover 252 covers the laminate of the buffer material 253, the temperature sensor 21, and the insulator 251.
  • structure 200Y3 can achieve the same effects as structures 200Y1 and 200Y2.
  • the structure 200Y4 shown in FIG. 16(D) includes a temperature sensor 21, a heat insulator 251, and a cover 252D.
  • the structure 200Y4 shown in FIG. 16(D) differs from the structure 200Y1 shown in FIG. 16(A) in that the cover 252 is replaced with a cover 252D.
  • the other configuration of the structure 200Y4 is the same as that of the structure 200Y1, and a description of similar parts will be omitted.
  • Cover 252D has an opening SL. Opening SL can be opened and closed. This configuration allows the laminate of temperature sensor 21 and insulator 251 to be inserted and removed through cover 252D. This makes it possible, for example, to replace only temperature sensor 21, or to remove cover 252D from the laminate of temperature sensor 21 and insulator 251 and wash only cover 252D.
  • Figures 17(A) and 17(B) are diagrams showing other modified examples of structures in which temperature sensors are arranged.
  • the structure 200Z1 shown in FIG. 17(A) has a configuration in which, for example, in the structure 200Y1 shown in FIG. 16(A), multiple temperature sensors 21, 22, and 23 are arranged in an array within the cover 252.
  • Structure 200Z1 is placed on surface 801 of bed 80. Structure 200Z1 is placed so that surface FS260 is on the opposite side to surface 801 of bed 80.
  • the mark M21 overlaps the temperature sensor 21
  • the mark M22 overlaps the temperature sensor 22
  • the mark M23 overlaps the temperature sensor 23.
  • the structure 200Z2 shown in FIG. 17(B) differs from the structure 200Z1 shown in FIG. 17(A) in that it has a mark M26.
  • the other configuration of the structure 200Z2 is similar to that of the structure 200Z1, and a description of similar parts will be omitted.
  • mark M26 overlaps multiple temperature sensors 21, 22, and 23.
  • the mark is not limited to one that indicates the position of the temperature sensor, but may also indicate the surface 2101 side of the temperature sensor.
  • the mark may indicate the side that faces the person to be detected 90 when the structure is placed on the bed 80 or the like.
  • the mark may indicate the position of the temperature sensor and also indicate the surface 2101 side of the temperature sensor.
  • FIGS 18(A), 18(B), and 18(C) are diagrams showing other modified examples of the structure, each of which has an anti-slip member provided.
  • the structure 200Z3 shown in FIG. 18(A) has the same configuration as the structures 200Z1 and 200Z2, except that the structure 200Z3 has multiple anti-slip members AS1 on the back surface FB260 of the cover.
  • the multiple anti-slip members AS1 are made of a material that has a high coefficient of friction with respect to the bed 80, such as rubber.
  • the multiple anti-slip members AS1 are arranged near both ends of the structure 200Z3 in the longitudinal direction (L direction in FIG. 18A).
  • the multiple anti-slip members AS1 are shaped to extend in the lateral direction of the structure 200Z3 (W direction in FIG. 18A).
  • the anti-slip members AS1 are preferably arranged such that, in a plan view of the structure 200Z3, the region REAS1 having the anti-slip members AS1 at both ends in the longitudinal direction overlaps with the temperature sensors 21-23. This allows the temperature sensors 21-23 to be stably fixed to the bed 80, etc.
  • the structure 200Z4 shown in FIG. 18(B) has the same configuration as the structures 200Z1 and 200Z2, except that the structure 200Z4 has an anti-slip member AS2 on the back surface FB260 of the cover.
  • the anti-slip member AS2 is made of a material that has a high coefficient of friction against the bed 80, such as rubber. Note that it is preferable that the anti-slip member AS2 has a high coefficient of friction over the entire surface, but it may also have a high coefficient of friction only partially (for example, a peripheral portion along the outer edge).
  • the anti-slip member AS2 is preferably positioned so as to overlap the temperature sensors 21-23 when viewed from above the structure 200Z4. This allows the temperature sensors 21-23 to be stably fixed to the bed 80, etc.
  • the structure 200Z5 shown in FIG. 18(C) has the same configuration as the structures 200Z1 and 200Z2, except that the structure 200Z5 has a plurality of anti-slip members AS3 on the back surface FB260 of the cover.
  • the plurality of anti-slip members AS3 are made of a material that has a high coefficient of friction with respect to the bed 80, such as rubber.
  • the multiple anti-slip members AS3 are arranged near both ends of the short side of the structure 200Z5 (W direction in FIG. 18(A)).
  • the multiple anti-slip members AS3 are shaped to extend in the long side of the structure 200Z5 (L direction in FIG. 18(C)).
  • the anti-slip members AS3 are preferably arranged such that, in a plan view of the structure 200Z5, the area REAS3 having the anti-slip members AS3 at both ends in the short direction overlaps with the temperature sensors 21-23. This allows the temperature sensors 21-23 to be stably fixed to the bed 80, etc.
  • FIG. 19 is a diagram showing another embodiment of a temperature sensor. As shown in FIG. 18, the temperature sensor 20W includes multiple temperature detection elements St, a main body 210W, and a buffer material 270.
  • the cushioning material 270 has shock absorbing properties and thermal insulation properties.
  • the cushioning material 270 is made of an insulating sponge made of polyurethane or other materials.
  • the cushioning material 270 is flat and has a front surface FS270 and a back surface FB270.
  • the cushioning material 270 is configured with a predetermined thickness that takes into consideration cushioning properties and durability.
  • a groove 279 is formed in the buffer material 270.
  • the groove 279 has a shape that extends mainly in a direction parallel to the front surface FS270 and the back surface FB270.
  • the groove 279 has a portion close to the front surface FS270 and a portion close to the back surface FB270 in the extending direction.
  • the portion close to the front surface FS270 and the portion close to the back surface FB270 are, for example, arranged alternately in the extending direction.
  • the cushioning material 270 has an opening OP270 near the surface FS270 that is connected to a groove 279 and exposed to the surface FS270.
  • the main body 210W is placed in the groove 279.
  • a wiring pattern is formed on the main body 210W, and is formed of, for example, a flexible cable.
  • the temperature detection element St is disposed in the opening OP270.
  • the temperature detection element St is mounted on the main body 210W.
  • the main body 210W on which multiple temperature detection elements St are mounted is inserted into the groove 279, and the multiple temperature detection elements St are exposed to the surface FS270 through the opening OP279.
  • the temperature sensor 21W can achieve the same function as the structure 200Y1, etc., which is equipped with the temperature sensor 21 shown in FIG. 16(A) and the like described above. Furthermore, since the temperature sensor 21W has fewer components than the structure 200Y1, etc., it can achieve the same function as the structure 200Y1, etc., with a simple configuration.
  • a portion of the groove 279 is positioned close to the back surface FB270, and the main body 210W is inserted into this portion.
  • the distance between the front surface FS270 of the cushioning material 270 and the groove 279 is long.
  • the thickness of the cushioning material 270 sandwiched between the front surface FS270 and the main body 210W can be increased. This makes it possible to more reliably prevent damage to the main body 210W due to the body pressure of the person 90 to be detected.
  • the multiple temperature detection elements St are exposed from the surface of the cushioning material 270. Therefore, the multiple temperature detection elements St can detect the temperature used for excretion detection with greater accuracy.
  • a first temperature sensor is disposed in a first area in which a person to be detected for excretion may move, and each of the first temperature sensors includes a plurality of temperature detection elements arranged in an array;
  • a second temperature sensor is disposed in a second area where the person to be detected for excretion may move, the second temperature sensor including a plurality of temperature detection elements arranged in an array;
  • a control unit that detects excretion based on a time change or a distribution change of at least one of a first temperature detection result of the first temperature sensor and a second temperature detection result of the second temperature sensor; a first switch connected between the first temperature sensor and the control unit and configured to control electrical connection and disconnection between the first temperature sensor and the control unit; a second switch connected between the second temperature sensor and the control unit and configured to control electrical connection and disconnection between the second temperature sensor and the control unit; Equipped with The control unit is determining whether or not the target person is present in the first area using the first temperature detection result; determining whether or not the target person is present in the
  • ⁇ 2> The excretion detection device of ⁇ 1>, wherein the plurality of temperature detection elements are thermistor elements that output a temperature detection result depending on the electrical conduction state with the control unit.
  • ⁇ 3> The excretion detection device of ⁇ 2>, in which the control unit intermittently determines the presence or absence of the target person at a predetermined time interval based on electrical conduction to the first temperature sensor and electrical conduction to the second temperature sensor.
  • ⁇ 4> An excretion detection device according to any one of ⁇ 1> to ⁇ 3>, wherein the first area and the second area are placed on the surface of bedding on which the person to be detected is lying down.
  • a third temperature sensor is provided to detect the temperature of the space to be detected and output an outside air temperature detection result,
  • the excretion detection device according to any one of ⁇ 1> to ⁇ 4>, wherein the control unit further uses the outside air temperature detection result to determine whether or not the target person is present.
  • ⁇ 6> An excretion detection device according to any one of ⁇ 1> to ⁇ 5>, wherein the control unit determines the presence or absence of the target person based on a temperature threshold different from that for detecting the excretion.
  • the first temperature sensor and the second temperature sensor each have a temperature detection target surface
  • the excretion detection device according to any one of ⁇ 1> to ⁇ 6>, wherein the plurality of temperature detection elements are two-dimensionally arranged in a layer parallel to the detection target surface.
  • the layer is a plurality of layers,
  • the excretion detection device of ⁇ 8> in which the temperature detection elements arranged in each of the layers are arranged at different positions when viewed in a direction perpendicular to the detection target surface.
  • the first temperature sensor or the second temperature sensor A flat membrane main body on which the plurality of temperature detection elements are mounted; a buffer material disposed on a rear surface of the main body, the buffer material having a higher elastic modulus and a lower thermal conductivity than the main body;
  • the excretion detection device according to any one of ⁇ 1> to ⁇ 9>,
  • a plurality of temperature detection elements that detect a temperature for detecting excretion of a detection target person;
  • a flat membrane main body on which the plurality of temperature detection elements are mounted;
  • a buffer material disposed on a rear surface of the main body, the buffer material having a higher elastic modulus and a lower thermal conductivity than the main body;
  • An excretion detection device comprising:
  • An excretion detection device comprising a cover that covers at least the front surface of the main body, has thermal conductivity, and has higher shock absorption than the main body.
  • the first temperature sensor or the second temperature sensor A flat membrane main body on which the plurality of temperature detection elements are mounted; A buffer material having a groove; Equipped with The main body is inserted into the groove, The excretion detection device according to any one of ⁇ 1> to ⁇ 9>, wherein the plurality of temperature detection elements are connected to the groove and disposed in a plurality of openings exposed to the outside of the cushioning material.
  • a plurality of temperature detection elements that detect a temperature for detecting excretion of a detection target person;
  • the control unit The excretion detection device according to any one of ⁇ 1> to ⁇ 18>, which determines that the type of excretion is urine, solid stool with little moisture, or soft stool with a lot of moisture.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

L'invention concerne un dispositif de détection d'excrétion comprenant un premier capteur de température, un second capteur de température, une unité de commande, un premier commutateur et un second commutateur. Le premier capteur de température est disposé dans une première zone où une personne soumise à une détection d'excrétion peut se déplacer, et est pourvu d'un réseau d'une pluralité d'éléments de détection de température dans chacun. Le second capteur de température est disposé dans une seconde zone où la personne soumise à une détection d'excrétion peut se déplacer, et est pourvu d'un réseau d'une pluralité d'éléments de détection de température dans chacun. L'unité de commande détecte une excrétion sur la base d'un changement temporel ou d'un changement de distribution dans au moins l'un d'un premier résultat de détection de température provenant du premier capteur de température et d'un second résultat de détection de température provenant du second capteur de température. Le premier commutateur est connecté entre le premier capteur de température et l'unité de commande, et commande l'isolation électrique et la conduction entre le premier capteur de température et l'unité de commande. Le second commutateur est connecté entre le second capteur de température et l'unité de commande, et commande l'isolation électrique et la conduction entre le second capteur de température et l'unité de commande. L'unité de commande détermine la présence ou l'absence de la personne soumise à une détection dans la première zone à l'aide du premier résultat de détection de température. L'unité de commande détermine la présence ou l'absence de la personne soumise à une détection dans la seconde zone à l'aide du second résultat de détection de température. L'unité de commande effectue une commande pour ouvrir le commutateur qui est connecté au capteur de température correspondant à la zone dans laquelle l'absence de la personne soumise à la détection a été déterminée.
PCT/JP2024/002869 2023-06-22 2024-01-30 Dispositif de détection d'excrétion Pending WO2024262079A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-102174 2023-06-22
JP2023102174 2023-06-22

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Publication Number Publication Date
WO2024262079A1 true WO2024262079A1 (fr) 2024-12-26

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000320849A (ja) * 1999-05-13 2000-11-24 Matsushita Electric Ind Co Ltd 採暖具
JP2010264009A (ja) * 2009-05-13 2010-11-25 Showa Denko Kk 離床センサ
WO2012093572A1 (fr) * 2011-01-07 2012-07-12 株式会社村田製作所 Capteur de température et structure à laquelle le capteur de température est fixé
JP2014033745A (ja) * 2012-08-07 2014-02-24 Hitoshi Mifuji 排泄検出センサ及び排泄検出装置
WO2018165109A1 (fr) * 2017-03-07 2018-09-13 Medline Industries, Inc. Capteur pour élément absorbant
US11020055B1 (en) * 2020-06-19 2021-06-01 Edward Li Intelligent multifunction bed monitor
WO2021199647A1 (fr) * 2020-03-31 2021-10-07 株式会社村田製作所 Capteur de température et ensemble de capteurs de température

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000320849A (ja) * 1999-05-13 2000-11-24 Matsushita Electric Ind Co Ltd 採暖具
JP2010264009A (ja) * 2009-05-13 2010-11-25 Showa Denko Kk 離床センサ
WO2012093572A1 (fr) * 2011-01-07 2012-07-12 株式会社村田製作所 Capteur de température et structure à laquelle le capteur de température est fixé
JP2014033745A (ja) * 2012-08-07 2014-02-24 Hitoshi Mifuji 排泄検出センサ及び排泄検出装置
WO2018165109A1 (fr) * 2017-03-07 2018-09-13 Medline Industries, Inc. Capteur pour élément absorbant
WO2021199647A1 (fr) * 2020-03-31 2021-10-07 株式会社村田製作所 Capteur de température et ensemble de capteurs de température
US11020055B1 (en) * 2020-06-19 2021-06-01 Edward Li Intelligent multifunction bed monitor

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