JP2013078566A - Excretion detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excretion detection system of non-contact type which is inexpensive, and capable of detecting any excretion from a care receiver, independent of adult or infant, without making him or her feel uncomfortable, and without imposing any burdens on his or her caregiver, or a child care person.SOLUTION: The excretion detection system includes a mattress 40 for a bed, on which a care receiver or infant is laid, including a plurality of gas paths 41 each having a plurality of holes 41a on the laid side; a portable gas detecting means 44 sending a gas detection signal if detecting any excretion-generated gas sucked by suction pumps 42 proided at the end of each gas path 41; an gas output change detecting means determining whether there is any change in output gas volume based upon the gas detection signal and sending a gas output change detection signal if any; an excretion detecting means determining that there is excretion when finding an increased amount of output gas based upon the gas output change detection signal; a means for notifying of excretion determination to a caregiver; and a recording means for recording at least any one of the results from the gas output change detection signal, excretion determination, and determination notification.

Description

  The present invention relates to an excretion detection system that detects excretion of a cared person or an infant, and more particularly to a non-contact type excretion detection system that can be used repeatedly.

  As a technique for detecting urinary incontinence of a cared person or an infant, there are a urinary incontinence detection system using a wetness sensor and a urinary incontinence detection system using a gas sensor. In a urinary incontinence detection system using a wetness sensor, for example, a sensor is directly embedded in a diaper, and urine is detected based on a potential difference generated when the sensor directly touches urine. In the case of a urinary incontinence detection system using a gas sensor, urine is detected by detecting chemical substances such as urea and ammonia contained in urine. Non-Patent Documents 1 to 4 show examples of a urinary incontinence detection system using a gas sensor.

Masashi Kikuchi, Seaki Shiratori, “Ammonia gas sensor using conductive polymer”, IEICE, pp.55-99, 2001 Yo Kato and Toshiharu Mukai, “Gain Sensor for Detection of Urinary Incontinence for Human-Contact Robots”, 6th System Integration Division Annual Conference (SI2005), pp.225-226, 2005 Tsutsuguchi Yoshio, Yonezawa Yasuto, Yamada Ariga, “Development of Defecation Detection Sensor System”, Technical Fureai Millennium 2000 Abstract, 2000 Makoto Nogata, Kazuhiro Ogawa, Masahiro Kawano, “Development of high-performance sensors for the elderly watching robot”, The Japan Society of Mechanical Engineers Robotics and Mechatronics Lecture '04, Proceedings 2004

  However, in the case of a urinary incontinence detection system using a wetness sensor, it is essential to dispose the wetness sensor every time, and costs are continuously increased. Furthermore, it is necessary to attach the sensor every time the diaper is changed, which takes time. Furthermore, care facilities and hospitals where various users gather must prepare diapers suitable for each size, which is also expensive. On the other hand, in the case of a urinary incontinence detection system using a gas sensor, there is no cost and hassle of disposing the sensor every time. However, when the gas is detected, the tube must be inserted directly into the diaper in order to inhale air, so that the work burden of the caregiver is still generated. Furthermore, the care recipient also has a problem that the tube is inserted into the diaper and feels uncomfortable.

  The object of the present invention is to detect excretion in view of such problems and the like, which is excellent in cost, has no burden on the caregiver, and does not make the cared person or infant uncomfortable. An object of the present invention is to provide a non-contact type excretion detection system.

  The excretion detection system of the present invention is an excretion detection system for detecting the excretion of a cared person or an infant. The mounting table on which the cared person or the infant is placed has the cared person or the infant placed thereon. A plurality of gas passages having a plurality of holes on the inner side, and gas generated from excrement, wherein the gas sucked from the air suction pump provided at the end of each gas passage is Gas detection means for detecting and outputting a gas detection signal, and determining whether there is a change in the gas output based on the gas detection signal from the gas detection means, and if there is a change in the gas output, the gas output change A gas detection output change detecting means for outputting a detection signal, and an excretion determination for determining that there is excretion when a change in gas output increases based on the gas output change detection signal from the gas detection output change detection means A notification means for notifying that the excretion determination means has determined the excretion; an output of a gas output change detection signal by the gas detection output change detection means; an excretion determination by the excretion determination means; or the notification Recording means for recording at least one of notifications by the means.

  The gas detection means may be detachably provided on the mounting table.

  An excretion detection system according to the present invention is an excretion detection system for detecting excretion of a cared person or an infant, detecting gas generated from excrement and outputting a gas detection signal; and from the gas detection unit Gas detection output change detection means for determining whether or not there is a change in gas output based on a gas detection signal and outputting a gas output change detection signal when there is a change in gas output; and the gas detection output change detection means An excretion determining means for determining that there is excretion when a change in gas output is increased based on a gas output change detection signal from the apparatus, and an informing means for informing that the excretion determining means has determined the excretion. And at least the gas detection means, the gas detection output change detection means, and the excretion determination means are configured on a mounting table on which the care recipient or the infant is placed. And butterflies.

  The excretion detection system of the present invention is an excretion detection system for detecting excretion of a cared person or the infant. Humidity detection means for detecting a change in humidity and a humidity change signal based on a humidity detection signal from the humidity detection means. Humidity detection output change detection means for determining presence or absence and outputting a humidity change detection signal when there is a change in humidity, and a change in humidity output based on the humidity change detection signal from the humidity detection output change detection means An excretion determining means for determining that the excretion has occurred, and a notifying means for notifying that the excretion determining means has determined the excretion, and at least the humidity detecting means and the humidity detection output change detecting means. And the said excretion determination means is comprised in the mounting base in which the said care receiver or the said infant is mounted, It is characterized by the above-mentioned.

  In the case of having a plurality of air suction pumps configured to be laid in a plane with a lattice shape or other arrangement, and the plurality of air suction pumps suck gas generated from the excrement and have gas detection means The gas detection means detects the gas sucked by the plurality of air suction pumps, and when the gas detection means has humidity detection means, the humidity detection means detects the gas sucked by the plurality of air suction pumps. The plurality of air suction pumps may be arranged on a mounting table on which the care recipient or the infant is placed.

  According to the present invention, there is provided a non-contact type excretion detection system that is excellent in cost, has no burden on a caregiver, and can detect excretion without being uncomfortable for a care recipient or an infant. it can.

It is a block diagram which shows the structure of the excretion detection sheet | seat of this embodiment. (A) is a configuration explanatory view of an excretion detection sheet. (B) is AA sectional drawing of FIG. 2 (A). It is a schematic block diagram of the excretion detection system by the other Example 1. It is a graph which shows the output of the gas sensor of the sensor part 24 by the structure of the other Example 1, and the output of a humidity sensor. (A) is a schematic block diagram of other Example 2. FIG. (B) is the top view which looked at FIG. 5 (A) from the A direction. (C) is AA sectional drawing of FIG.5 (B). It is a perspective view of the mattress for beds used for the excretion detection system of other Examples 3. It is principal part AA sectional drawing of FIG. It is principal part BB sectional drawing of FIG. It is principal part AA sectional drawing of FIG. 6 in the case of providing the tube 41c. It is principal part BB sectional drawing of FIG. 6 in the case of providing the tube 41c. It is an external view of a portable gas detection means. It is an internal schematic block diagram of a portable gas detection means. It is a top view at the time of using a sheet | seat. It is a schematic system block diagram of the excretion detection system of the other Example 3.

  The case where the excretion detection system of the present invention is applied to an excretion detection sheet for a cared person will be described as an example.

  FIG. 1 is a block diagram showing the configuration of the excretion detection sheet of the present embodiment. FIG. 2A is a configuration explanatory diagram of the excretion detection sheet. FIG. 2B is a cross-sectional view taken along the line AA in FIG. 2A and 2B, the cared person is indicated by a broken line. Areas 10a and 10B indicating the region of the excretion detection sheet 10 are indicated by alternate long and short dashed lines.

  The excretion detection sheet 10 of the present embodiment includes a sensor unit 2 including a gas sensor 2A as a gas detection unit that detects gas generated from excrement (defecation, urine) and outputs a gas detection signal, and gas from the gas sensor 2A. Change detection means 3A including gas detection output change detection means 3Aa that determines whether or not there is a change in gas output based on the detection signal and outputs a gas output change detection signal when there is a change in gas output, and gas Based on the gas output change detection signal from the detection output change detection means 3Aa, the information processing section 3 including the excretion determination means 3B for determining the presence or absence of excretion, and the excretion determination means 3B of the information processing section 3 have excreted An informing means 4 for informing that the determination has been made is provided. The excretion detection sheet 10 is configured on a placing table 5 such as a bed or a futon or a bed mattress on which a care recipient is placed. Although the gas sensor 2A of the present embodiment is configured to detect gas generated from excrement sucked by the air suction means 1, the air suction means 1 may be omitted when the accuracy of the gas sensor 2 is high. .

  The air suction means 1 is constituted by a micro air pump as a plurality of air suction pumps. For example, a micro blower (size 20 × 20 × 1.85 mm) manufactured by Murata Manufacturing Co., Ltd. is used. A plurality of micro air pumps configured to spread in a flat pattern in a grid or other arrangement sucks gas generated from excrement.

  The sensor unit 2 includes a gas sensor 2A as a gas detection unit, a pressure sensor 2B, and a humidity sensor 2C as a humidity detection unit. The gas sensor 2A detects components in the air. Specifically, chemical substances such as urea and ammonia generated from excrement sucked by the air suction means 1 are detected. As the gas sensor 2A, for example, TGS2602 manufactured by Figaro Giken Co., Ltd. is used. The pressure sensor 2 </ b> B detects pressure caused by the weight of the care recipient placed on the excretion detection sheet 10 and outputs a pressure detection signal. The humidity sensor 2C detects a change in the relative humidity of the air during urinary incontinence and outputs a humidity detection signal. Specifically, the humidity of the gas generated from the excrement sucked by the air suction means 1 is detected. For example, CHS-GSS manufactured by TDK Corporation is used as the humidity sensor 2C.

  The information processing unit 3 includes change detection means 3A, excretion determination means 3B, and seizure determination means 3C. Specifically, it is constituted by a microcomputer or the like. For example, H8 / 3694F manufactured by Renaissance Electronics Co., Ltd. is used as the microcomputer.

  The change detection unit 3A includes a gas detection output change detection unit 3Aa, a pressure detection output change detection unit 3Ab, and a humidity detection output change detection unit 3Ac. The gas detection output change detection means 3Aa determines the presence or absence of a change in gas output based on the gas detection signal from the gas sensor 2A, and when there is a change in gas output, the gas output change detection signal is output as the excretion determination means 3B. Output to. The pressure detection output change detection means 3Ab determines the presence / absence of a pressure change based on the pressure detection signal from the pressure sensor 2B, and outputs a pressure change detection signal to the seizure determination means 3C when there is a pressure change. The humidity detection output change detection means 3Ac determines whether there is a change in humidity based on the humidity detection signal from the humidity sensor 2C, and outputs a humidity change detection signal to the excretion determination means 3B when there is a change in humidity.

  When the excretion determination means 3B receives the gas output change detection signal or the humidity change detection signal from the change detection means 3A, it determines the presence or absence of excretion based on each signal. Specifically, it is determined that excretion has occurred when the change in gas output based on the gas output change detection signal from the change detection means 3A has increased, or when the gas output has exceeded a predetermined threshold level. Further, when the humidity change based on the humidity change detection signal from the change detection means 3A increases or when the humidity becomes equal to or higher than a predetermined threshold level, it is determined that there is excretion. Then, the excretion determination means 3B outputs an excretion notification signal to the notification means 4 when it is determined that there is excretion.

  The seizure determination means 3C, upon receiving the pressure detection signal from the change detection means 3A, determines the presence or absence of a seizure based on the pressure detection signal. Specifically, it is determined that there has been a seizure when the change in pressure based on the pressure detection signal from the change detection means 3A has increased, or when the pressure has exceeded a predetermined threshold level. Moreover, when the change in pressure becomes a pressure change peculiar to the seizure, it may be determined that the seizure has occurred. Then, the seizure determination unit 3C outputs a seizure notification signal to the notification unit 4 when it is determined that there is a seizure.

  The notification means 4 includes an alarm device that notifies that there is excretion or a seizure, and an information transmission / reception unit configured to be able to exchange information. When the notification means 4 receives the excretion notification signal from the excretion determination means 3B, the caregiver is mainly informed of excretion by an alarm device comprising a buzzer, a lamp, a vibrator, a display unit, etc. wirelessly or by wire via the information transmission / reception unit. . Moreover, when the notification means 4 receives the seizure notification signal from the seizure determination means 3C, the alert is mainly notified to the caregiver by the alarm device by wireless or wired via the information transmitting / receiving unit. Different notification methods may be used for excretion notification and seizure notification. In the case of a seizure, since an emergency is required, all alarm devices may be activated, or a telephone may be connected to a predetermined line (for example, a nurse center).

  Such an excretion detection sheet 10 is laid on a placing table 5 such as a futon, a bed, or a mattress for a bed, and a cared person is placed on the excretion detection sheet 10 and used.

  The area 10b of the excretion detection sheet 10 is provided with a pressure sensor 2C. The area 10a includes a gas sensor 2A, a pressure sensor 2B, a humidity sensor 2C, an information processing unit 3, and a notification unit 4. In the area 10a, a plurality of air suction pumps constituting the air suction means 1 are arranged on a plane. Further, the area 10a is provided with a power supply circuit (not shown) for supplying necessary power to the sensors 2A to 2C, the information processing unit 3, and the notification unit 4. In the present embodiment, the notification unit 4 is also included in the seat, but may be configured outside. In this case, a signal from the information processing unit 3 is output to the notification unit 4 provided outside via a code, a bus, a wired cable, a wireless cable, or the like.

  In addition, it is preferable that the areas 10a and 10b have a smooth upper surface so that the care recipient does not feel uncomfortable due to various members. For example, the upper surface is covered with a cloth, a nonwoven fabric or the like in consideration of the sensitivity of the sensors 2A to 2C provided in the excretion detection sheet 10. The cloth, non-woven fabric, etc. are preferably of a thickness and material that do not hinder the sensing of the sensors 2A to 2C.

  According to the excretion detection sheet 10 described above, since it is configured to be repeatedly usable using the gas sensor 2A and the humidity sensor 2C, an excretion detection sheet excellent in cost can be provided. Furthermore, since the excretion detection sheet 10 is configured in a sheet shape and placed on the mounting table 5 so that the cared person is placed, there is no burden on the carer and the cared person becomes uncomfortable. And excretion can be detected.

  The seizure determination means 3C is not limited to the seizure, and may be used to determine whether the care recipient is lying in a correct posture and whether there is no danger of bed slipping. For example, it may be detected based on the pressure detection signal that the cared person is in the same posture for a long time, lying in a bad posture, or the like. For example, when the output of the pressure detection signal does not change for a predetermined time or more, it may be determined that there is a danger of bed slip and the notification signal may be output to the notification unit 4. As described above, since the pressure sensor 2B, the pressure detection output change detection means 3Ab, and the seizure determination means 3C are provided, it is possible to cope with the seizure notification and the prevention of bedsores, thereby realizing a comprehensive care support sheet (care support system). it can.

  Next, other embodiments 1, 2 and 3 of the excretion detection system of the present invention will be described.

  FIG. 3 is a schematic configuration diagram of an excretion detection system according to another embodiment. In another embodiment 1, a suction pump, a sensor unit, a data processing unit, etc. are installed outside, and air is supplied through a tube from an air suction port incorporated in a placing table such as a futon, a sheet, a bed or a bed mattress. It was configured to detect gas output changes and humidity changes by suction.

  The air suction port 21 is configured by being incorporated in a mounting table 22 such as a futon, a sheet, a bed, or a bed mattress. Then, the suction pump 23, the sensor unit 24, and the data processing unit 25 are installed outside the mounting table 22. The suction pump 23 sucks air from the air suction port 21 through the tube 26. The sucked air is detected by the sensor unit 24 via the tube 26 by the sensor unit 24. In addition, it is preferable to make the upper surface of the mounting table 22 incorporating the air suction port 21 smooth so that the care recipient does not feel uncomfortable. For example, the upper surface is covered with a cloth, a nonwoven fabric or the like. The cloth, non-woven fabric and the like are preferably of a thickness and material that do not hinder the suction of the air suction port 21.

  The sensor unit 24 includes a gas sensor (not shown) and a humidity sensor (not shown). The data processing unit 25 includes change detection means (not shown) and excretion determination means (not shown). The data processing unit 25 determines excretion based on a signal from the sensor unit 24. When excretion is determined by the data processing unit 25, the excretion is notified by an informing means (not shown).

  In addition, since the operation | movement and apparatus example of a gas sensor and a humidity sensor with which Example 1 is provided are the same as those of the gas sensor 2A and the humidity sensor 2C described above, description thereof is omitted. The operation of the data processing unit 25 is the same as the operation of the information processing unit 3 and the device example described above, and thus the description thereof is omitted. Specifically, the change detection means includes a gas detection output change detection means (not shown) and a humidity detection output change detection means (not shown). Then, the gas detection output change detection means performs the same operation as the gas detection output change detection means 3Aa described above. The humidity detection output change detection means performs the same operation as the humidity detection output change detection means 3Ac described above. Moreover, since the operation | movement of an excretion determination means is the same as that of the excretion determination means 3B mentioned above, description is abbreviate | omitted. Further, since the operation of the notification means (not shown) is the same as the operation of the notification means 4 described above, the description thereof is omitted.

  FIG. 4 is a graph illustrating the output of the gas sensor of the sensor unit 24 and the output of the humidity sensor according to the configuration of the first embodiment. This is the output of each sensor when a diaper used in an actual care facility is worn and urination is performed. The horizontal axis is the real time axis (time), and an auxiliary line is drawn every 30 [sec]. The vertical axis represents a 10-bit AD conversion value using an H8 / 3694F microcomputer manufactured by Renaissance Electronics Corporation. Time T indicated by a bold line is a time when urination is performed.

  4A shows the AD output of the gas sensor when the distance L from the excretion point X1 to the point X2 of the air suction port 21 in FIG. 3 is 0 mm. FIG. 4B shows the AD output of the humidity sensor when the distance L from the excretion point X1 to the point X2 of the air suction port 21 in FIG. 3 is 0 mm. The point X2 of the air suction port 21 refers to a point on the mounting table 22 where the air suction port 21 is incorporated in the lower part. 4 (A) and 4 (B), it can be seen that after excretion, the AD output increases for both the gas sensor and the humidity sensor, and excretion is detected.

  On the other hand, FIG. 4C shows the AD output of the gas sensor when the distance L from the excretion point X1 to the point X2 of the air suction port 21 is 100 mm. FIG. 4D shows an AD output of the humidity sensor when the distance L from the excretion point X1 to the point X2 of the air suction port 21 in FIG. 3 is 100 mm. As shown in FIG. 4C, even when the distance L is 100 mm, the gas sensor shows that the AD output increases after excretion, and excretion is detected. However, as shown in FIG. 4D, when the distance L is 100 mm, the humidity sensor does not show an increase in AD output even after excretion, and excretion is not detected. From the above, taking into account the physique, body shape, gender, etc. of the cared person, the air suction port 21 specifies in advance a position where the gas sensor and humidity sensor can detect excretion, and the air suction port 21 is installed at the position. It is preferable.

  As described above, according to the excretion detection system according to the other embodiment 1, since it is configured to be repeatedly usable using the gas sensor and the humidity sensor, an excretion detection system excellent in cost can be provided. Moreover, since the sensor is not disposable, there is no burden on the caregiver. Furthermore, since the configuration is such that the cared person is not contacted, the cared person is not uncomfortable and excretion can be detected.

  Next, another embodiment 2 and another embodiment 3 will be described. Other Examples 2 and 3 are examples in which the excretion detection system of the present invention is applied to a bed mattress.

  FIG. 5A is a schematic configuration diagram of another embodiment 2. FIG. 5B is a plan view of FIG. 5A viewed from the direction A, and FIG. 5C is a cross-sectional view taken along line AA of FIG. The sensing plate 31 is provided over almost the entire surface of the bed mattress 30. The sensing plate 31 includes a pressure sensor (not shown), a gas sensor (not shown), and a humidity sensor (not shown). The pressure sensor (not shown) is preferably provided on substantially the entire surface of the sensing plate 31. The gas sensor and the humidity sensor are preferably provided at a position where the lower body is placed when the cared person is placed on the bed mattress 30. Specifically, it is preferable to be provided at the position of the buttocks when the cared person is placed on his back. In the example of FIGS. 5A and 5B, it is preferably provided on the information processing unit 33 provided at the lower part of the sensing plate 31.

  The device storage portion 32 is preferably provided at a position where the lower body is placed when the care recipient is placed on the bed mattress 30. Specifically, when the cared person is placed on his / her back, it is preferable to be provided at the buttocks and around the buttocks.

  The device storage unit 32 includes an information processing unit 33, a power supply circuit 34, and a notification unit 35 inside. The power supply circuit 34 is for supplying power to each sensor and information processing unit 33 and the notification means 35 via the wiring plug connector 37 and the power supply wiring 36.

  The operations and device examples of the gas sensor (not shown), pressure sensor (not shown) and humidity sensor (not shown) are the same as the operations and device examples of the gas sensor 2A, pressure sensor 2B and humidity sensor 2C described above. Description is omitted. Since the operation of the information processing unit 33 is the same as the operation of the information processing unit 3 described above, the description thereof is omitted. Since the operation of the notification unit 35 is the same as the operation of the notification unit 4 described above, description thereof is omitted.

  As described above, according to the bed mattress 30 according to the second embodiment, the bed mattress 30 can be repeatedly used by using the gas sensor 2A and the humidity sensor 3C. Therefore, it is possible to provide an excretion detection system excellent in cost. it can. Furthermore, each sensor, the information processing unit 33 and other constituent members are incorporated in the bed mattress 30 so that the caregiver is not burdened, and the cared person is not uncomfortable and can detect excretion. It becomes possible.

  In the second embodiment described above, the excretion detection system according to the present invention is applied to the bed mattress 30. However, the bed mattress may not be a bed mattress as long as the care receiver is placed thereon. For example, the present invention can be applied to mattresses, beds, sheets, and other mounting tables.

  In each embodiment, both the gas sensor and the humidity sensor are used as detectors for excretion detection. However, only the gas sensor or only the humidity sensor may be used as a detector.

  Furthermore, when a gas sensor and a humidity sensor are used, the excretion determination means 3B determines whether there is excretion based on the gas output change detection signal, and determines whether there is excretion based on the humidity change detection signal. However, if it can be determined that there was excretion based on one of the signals, it may be determined that there was excretion, and if it can be determined that both the gas output change detection signal and the humidity change detection signal were excreted It may be determined that there is excretion only. The determination condition may be appropriately changed according to the sensitivity of the gas sensor and the humidity sensor.

  FIG. 6 is a perspective view of a bed mattress used in the excretion detection system of another embodiment 3. 7 is a cross-sectional view taken along line AA of the main part of FIG. 6, and FIG. 8 is a cross-sectional view taken along line BB of the main part of FIG. The bed mattress 40 is an example of a mounting table, and is made of, for example, urethane. The bed mattress 40 includes a plurality of gas paths 41.

The gas path 41 is preferably provided at a position where the lower body is placed when the care recipient is placed on the bed mattress 40. Specifically, it is preferable to be provided at the position of the buttocks when the cared person is placed on his back. The gas path 41 includes a tube-shaped cavity 41b, and a plurality of holes 41a are formed on the side of the cavity 41b on which a care receiver is placed.
An air suction pump 42 (hereinafter referred to as a suction pump) is provided at the end of each gas path 41. As the suction pump 42, for example, a micro blower (size 20 × 20 × 1.85 mm) manufactured by Murata Manufacturing Co., Ltd. is used. The suction pump 42 is activated in response to power supply from a power supply unit (not shown) provided in the connector 43.
The connector 43 includes gas detection means and the like which will be described later. Although the connector 43 is provided in the lower part of the some suction pump 42 in FIG. 6, it should just be able to detect the gas from the suction pump 42, and an installation position is not limited.

Gas generated from the excrement of the cared person placed on the bed mattress 40 is sucked by the suction pump 42 and taken into the cavity 41b through the hole 41a. And the gas detection means with which the connector 43 is equipped passes through the inside of the cavity part 41b, and detects the said gas.
It is preferable that the holes 41 a are arranged along the direction of the gas path 41. 7 shows a cross section of the main part AA of FIG. 6 at a position where the hole 41a is not formed, and FIG. 8 shows a cross section of the main part BB of FIG. 6 at a position where the hole 41a is formed. .

  The hollow portion 41b of the gas path 41 may be provided with a tube 41c made of a rubber material, a resin material, or the like. 9 and 10 are cross-sectional views of the main part when the tube 41c is provided in the hollow part 41b, and FIG. 9 is a cross-sectional view of the main part AA in FIG. 6 at a position where the hole 41a is not formed. 10 is a cross-sectional view taken along the line BB in FIG. 6 at a position where the hole 41a is formed. The thickness of the portion where the hole 41a of the bed mattress 40 is formed is, for example, about several tens of mm. Therefore, for example, when the hardness of the urethane material of the bed mattress 40 is small and the cared person is placed, the gas path 41, that is, the hole 41a or the cavity 41b is blocked, etc., the tube 41c is interposed. This is useful because gas can be collected.

FIG. 11 is an external view of the portable gas detection means 44 provided with the gas detection means and the like provided in the connector 43, and FIG. As shown in FIG. 11, the portable gas detection means 44 includes a window 44a in the housing. The gas sucked by the suction pump 42 described above is taken into the portable gas detection means 44 through the window 44a.
The portable gas detection means 44 includes a power sensor 46 including a gas sensor 45 as a gas detection means, a suction pump 42, various storage batteries, or various commercial batteries (for example, AA batteries). The portable gas detection means 44 is configured to be removable from the connector 43 and portable.

When the portable gas detection means 44 is installed in the connector 43, the gas sensor 45 detects the gas from the suction pump 42 provided at the end of each gas path 41, and the gas is detected via a communication network (described later). Send the detection signal to the outside. The gas sensor 45 is activated in response to power supply from a power supply unit (not shown) provided in the connector 43. Moreover, when the power supply part 46 is comprised by storage batteries, such as a lithium ion battery, the power supply part 46 is charged by receiving the power supply from the power supply part (not shown) with which the connector 43 is equipped.
For example, when the portable gas detection means 44 is detached from the connector 43 and used, such as when a cared person or an infant goes out, the suction pump 42 and the gas sensor 45 provided in the portable gas detection means 44 are connected to the power supply unit. The power supply from 46 is started. The suction pump 42 provided in the portable gas detection means 44 sucks the gas from the outside through the window 44a, and the gas sensor 45 detects the gas. The portable gas detection means 44 is carried, for example, near a cared person or an infant's buttocks.

  FIG. 13 is a plan view when a sheet 60 is used as an example of the mounting table. A plurality of gas paths 61 are provided in the sheet 60. A suction pump 62 is provided at each end of each gas path 61. The gas sucked by the suction pump 62 is detected by a gas sensor (not shown) provided in the portable gas detection means 64 provided in the connector 63. The other configuration of the gas path 61 is the same as that of the gas path 41, the other configuration of the suction pump 62 is the same as that of the suction pump 42, and the other configuration of the connector 63 is the same as that of the connector 43. Since the other structure of the means 64 is the same as that of the portable gas detection means 44, description is abbreviate | omitted.

  FIG. 14 is a schematic system configuration diagram of an excretion detection system according to another embodiment 3. A connector 43 of the bed mattress 40 includes a USB terminal, a Bluetooth module, a TA (Terminal Adapter) terminal, a dock terminal for charging, and the like, and a communication network 50 (for example, Internet communication, LAN cable, Dock connector, USB cable). Or wireless communication such as Bluetooth (registered trademark), wireless LAN (IEEE-802.11 standard Wi-Fi, etc.), infrared (IrDA DATA1.0 etc.), terminal 51, Wi-Fi access point 52, the system manager, the caregiver and other users 53 operate the smartphone 54, the server or computer 55a in the cloud 55, the computer 56a in the local system 56 installed in the nurse center, etc. To do.

  The smartphone 54, the server or computer 55a in the cloud 55, and the computer 56a in the local system 56 may be any means of gas detection output change detection means, excretion determination means, notification means, and recording means depending on the application provided in each device. Or it functions as all means. Specifically, the smartphone 54, the server or computer 55a in the cloud 55, and the computer 56a in the local system 56 receive a gas detection signal from the gas sensor 45 provided in the connector 43 via the communication network 50 and the like, and detect the gas detection. Based on the signal, the presence / absence of a change in gas output is determined, and when there is a change in gas output, a gas output change signal is output. And based on a gas output change detection signal, when the change of the output of gas increases, it determines with having excreted. In addition, it notifies that the excretion has been determined. Furthermore, at least one of the output of the gas output change detection signal, the excretion determination, or the notification is recorded in a recording unit such as a hard disk inside the apparatus. The smartphone 54, the server or computer 55a in the cloud 55, and the computer 56a in the local system 56 are not limited to a configuration that functions as gas detection output change detection means, excretion determination means, notification means, and recording means. Any one of the smartphone 54, the server or computer 55a in the cloud 55, and the computer 56a in the local system 56 connected so as to be able to exchange information from the connector 43 is a gas detection output change detection means, excretion determination means, and notification means. , It is configured to function as any one of the recording means. For example, only the computer 56a in the local system 56 may function as all these means, and the server 54 or the computer 55a in the smartphone 54 and the cloud 55 may function only as notification means. The smartphone 54 may function as a gas detection output change detection unit, an excretion determination unit, and a notification unit, and the computer 56a in the local system 56 may receive information from the smartphone 54 and function as a recording unit.

  Further, in the above-described embodiment, the urination determination is made based on the presence or absence of the gas output change by the gas sensor and the gas detection output change detecting means, but the humidity may be detected. In this case, a humidity sensor as a humidity detection means is provided in the portable gas detection means 44, and the portable gas detection means 44 is also functioned as a humidity detection means for detecting a change in humidity. Any one of the smartphone 54, the server or computer 55a in the cloud 55, and the computer 56a in the local system 56 may function as the humidity detection output change detection means. The excretion determining means determines that there is excretion based on either or both of the humidity change detection signal from the humidity detection output change detection means and the gas output change detection signal from the gas detection output change detection means. Configure to

  About each Example mentioned above, you may comprise so that it can discriminate | determine whether it is urination or defecation using both the sensor which detects ammonia gas as a gas sensor, and the sensor which detects odor gas. In addition, since the gas sensor, the humidity sensor, and the pressure sensor have temperature dependency, a temperature sensor for performing temperature compensation may be further provided.

  The scope of application of the present invention is not limited to the above embodiment. INDUSTRIAL APPLICABILITY The present invention can be widely applied to an excretion detection system that can detect excretion in a non-contact manner for a cared person or an infant.

10 excretion detection sheet, 10a, 10b area, 1 air suction means (air suction pump), 2 sensor section, 2A gas sensor, 2B pressure sensor, 2C humidity sensor, 3 information processing section, 3A change detection means, 3Aa gas detection output change Detection means, 3Ab pressure detection output change detection means, 3Ac humidity detection output change detection means, 3B excretion determination means, 4 notification means, 5, 22 mounting table, 21 air suction port, 23 suction pump, 24 sensor unit, 25 data processing Part, 30, 40 mattress for bed, 31 sensing plate, 33 information processing part, 35 informing means, 41, 61 gas path, 41a hole, 41b hollow part, 41c tube, 42, 62 suction pump, 43, 63 connector, 44 , 64 Portable gas detection means, 44a Window part 45 Gas sensor, 46 Power supply part, 50 Communication network, 51 Terminal, 52 W -Fi access points, 53 user, 54 smartphone, 55 cloud 56 local system, 60 sheets

Claims (5)

In the excretion detection system that detects the excretion of the care recipient or infant,
The mounting table on which the care receiver or the infant is placed is configured by internally forming a plurality of gas paths having a plurality of holes on the side on which the care receiver or the infant is placed,
Gas detection means for detecting gas that is generated from excrement and sucked from an air suction pump provided at an end of each gas path and outputting a gas detection signal;
Gas detection output change detection means for determining the presence or absence of a change in gas output based on a gas detection signal from the gas detection means, and outputting a gas output change detection signal when there is a change in gas output;
Based on the gas output change detection signal from the gas detection output change detection means, excretion determination means for determining that there was excretion when the change in gas output increased,
Informing means for informing that the excretion determining means has determined excretion;
A recording unit that records at least one of an output of a gas output change detection signal by the gas detection output change detection unit, an excretion determination by the excretion determination unit, or a notification by the notification unit;
An excretion detection system comprising:   The excretion detection system according to claim 1, wherein the gas detection means is detachably provided on the mounting table. In the excretion detection system that detects the excretion of the care recipient or infant,
Gas detection means for detecting gas generated from excrement and outputting a gas detection signal;
Gas detection output change detection means for determining the presence or absence of a change in gas output based on a gas detection signal from the gas detection means, and outputting a gas output change detection signal when there is a change in gas output;
Based on the gas output change detection signal from the gas detection output change detection means, excretion determination means for determining that there was excretion when the change in gas output increased,
Informing means for informing that the excretion determining means has determined excretion;
Have
An excretion detection system, wherein at least the gas detection means, the gas detection output change detection means, and the excretion determination means are configured on a mounting table on which the care receiver or the infant is placed. In the excretion detection system that detects the excretion of the care recipient or infant,
Humidity detection means for detecting humidity changes;
Humidity detection output change detection means for determining the presence or absence of a change in humidity based on the humidity detection signal from the humidity detection means, and outputting a humidity change detection signal when there is a change in humidity;
Based on the humidity change detection signal from the humidity detection output change detection means, excretion determination means for determining that there is excretion when the change in the output of humidity has increased,
Informing means for informing that the excretion determining means has determined excretion;
Have
An excretion detection system, wherein at least the humidity detection means, the humidity detection output change detection means, and the excretion determination means are configured on a mounting table on which the care receiver or the infant is placed. It has a plurality of air suction pumps that are laid out in a flat form in a grid or other arrangement,
The plurality of air suction pumps sucks gas generated from the excrement,
In the case of having a gas detection means, the gas detection means detects the gas sucked by the plurality of air suction pumps,
When having a humidity detection means, the humidity detection means detects the humidity of the gas sucked by the plurality of air suction pumps,
5. The excretion detection system according to claim 3, wherein the plurality of air suction pumps are configured to be spread on a mounting table on which the care recipient or the infant is mounted.