Toilet system

Abstract

To provide a toilet system which is highly convenient in daily life.SOLUTION: A toilet system comprising: a toilet device including a toilet seat on which a user is seated; a skin gas sensor provided in the toilet device and configured to detect skin gas emitted from skin of the user; a feces sensor provided in the toilet device and configured to detect a state of feces discharged to the toilet device; a controller configured to estimate a fatigue state of the user based on a detection result of the skin gas sensor and a detection result of the feces sensor; and a notification part configured to notify an estimation result of the controller.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Aspects of the present invention relate generally to toilet systems. [Background technology]

[0002] A device that detects biological gases and evaluates the degree of fatigue is known (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-78585 Summary of the Invention [Problem to be solved by the invention]

[0004] The evaluation device described in Patent Document 1 cannot evaluate the degree of fatigue unless the indicator is worn, and therefore may lack convenience.

[0005] The aspects of the present invention have been made based on the recognition of such problems, and have an object to provide a toilet system that is highly convenient for everyday use. [Means for solving the problem]

[0006] A first aspect of the present invention is a toilet system comprising: a toilet device having a toilet seat on which a user sits; a skin gas sensor provided in the toilet device that detects skin gas emitted from the user's skin; a stool sensor provided in the toilet device that detects the state of stool excreted into the toilet device; a control unit that estimates the user's state of fatigue based on the detection results of the skin gas sensor and the detection results of the stool sensor; and an alarm unit that notifies the control unit of the estimation result.

[0007] This toilet system can estimate the user's fatigue level based on the detection results of the skin gas sensor and the feces sensor installed in the toilet device. In addition, the user can check their fatigue level when using the toilet device in their daily lives.

[0008] A second aspect of the present invention is the toilet system of the first aspect, wherein the skin gas sensor detects ammonia gas.

[0009] This toilet system can estimate the user's level of fatigue based on the ammonia gas emitted from the user's skin.

[0010] A third aspect of the present invention is the toilet system of the first aspect, characterized in that the control unit calculates the amount of skin gas based on the detection result of the skin gas sensor.

[0011] This toilet system can estimate the user's level of fatigue based on the amount of skin gas.

[0012] A fourth aspect of the present invention is the toilet system of the first aspect, characterized in that the control unit calculates the properties of the stool based on the detection result of the stool sensor.

[0013] This toilet system can estimate the state of fatigue in more detail by detecting the properties of stool.

[0014] A fifth aspect of the present invention is a toilet system in which, in the third aspect, the control unit estimates that the user is experiencing mental stress when the amount of skin gas is above a threshold and the state of the stool meets predetermined conditions.

[0015] This toilet system can estimate mental stress, which is a part of the fatigue state, based on the amount of skin gas and the state of the stool.

[0016] A sixth aspect of the present invention is a toilet system in which, in the third aspect, the control unit estimates that the user is experiencing physical stress when the amount of skin gas is above a threshold and the state of the stool does not satisfy predetermined conditions.

[0017] This toilet system can estimate the level of physical stress, which is part of the fatigue state, based on the amount of skin gas and the state of the stool.

[0018] A seventh aspect of the present invention is a toilet system in which, in the third aspect, the control unit infers that when the amount of skin gas is less than a threshold value and the condition of the stool satisfies predetermined conditions, the user is free from mental stress and physical stress and the cause of the condition of the stool is derived from the user's diet.

[0019] According to this toilet system, it is possible to estimate that the cause of poor stool quality is not mental or physical stress, but rather dietary factors, based on the amount of skin gas and the condition of the stool.

[0020] An eighth aspect of the present invention is a toilet system according to the first aspect, further comprising a memory unit for storing the detection results of the stool sensor, and wherein, when the stool sensor does not detect the stool, the control unit estimates the fatigue state based on the detection results of the skin gas sensor and past detection results of the stool sensor stored in the memory unit.

[0021] According to this toilet system, even if the user does not defecate, the fatigue state can be estimated using the results of past defecation detection.

[0022] A ninth aspect of the present invention is the toilet system of the first aspect, characterized in that the notification unit notifies a recommendation for the fatigue state.

[0023] This toilet system allows the user to respond to the estimated state of fatigue.

[0024] A tenth aspect of the present invention is a toilet system according to the ninth aspect, characterized in that the notification unit notifies the user of suggestions that will help relieve the mental stress if it is estimated that the user is suffering from mental stress.

[0025] This toilet system allows users to recognize how they can relieve mental stress.

[0026] An eleventh aspect of the present invention is a toilet system according to the first aspect, characterized in that the toilet seat has a seating portion on which the user sits, a bottom portion opposite the seating portion, and a recessed portion recessed from the seating portion toward the bottom portion, and the skin gas sensor is located below the upper surface of the seating portion and provided in the recessed portion.

[0027] According to this toilet system, the skin gas sensor can efficiently detect ammonia gas that fills the space within the recess.

[0028] A twelfth aspect of the present invention is a toilet system according to the first aspect, further comprising a seating sensor provided in the toilet device that detects the user sitting on the toilet seat, and the control unit estimates the fatigue state based on the detection results of the skin gas sensor and the detection results of the feces sensor detected while the user is sitting on the toilet seat.

[0029] This toilet system makes it possible to accurately estimate the user's level of fatigue. [Effects of the Invention]

[0030] According to aspects of the present invention, a toilet system that is highly convenient for everyday use is provided. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a perspective view showing a toilet unit of a toilet system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing a communication system of the toilet system. [Figure 3] FIG. 10 is a side view showing the positional relationship between a user seated on a toilet seat and a skin gas sensor. [Figure 4] 2 is a cross-sectional view of the toilet seat and the skin gas sensor in FIG. 1, as viewed from the direction of arrow AA. [Figure 5] FIG. 10 is an explanatory diagram showing a series of flows of actions of a user using a toilet unit and a control process for estimating the user's fatigue state. [Figure 6] 10 is a flowchart showing a skin gas and stool property control process executed by the control unit. [Figure 7] FIG. 10 is an explanatory diagram showing an example of the detection result of the skin gas sensor displayed on the notification unit of the information terminal. [Figure 8] FIG. 10 is an explanatory diagram showing an example of the detection result of the feces sensor displayed on the notification unit of the information terminal. [Figure 9] FIG. 10 is an explanatory diagram showing an example in which the control unit estimates mental stress; [Figure 10] FIG. 10 is an explanatory diagram showing an example of a case where the control unit estimates physical stress. [Figure 11] FIG. 10 is an explanatory diagram showing an example in which the control unit estimates that the state of stool is derived from food. [Figure 12] FIG. 10 is an explanatory diagram showing an example in which the control unit has estimated the state to be normal; DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, like components are designated by like reference numerals and detailed descriptions thereof will be omitted where appropriate.

[0033] FIG. 1 is a perspective view showing a toilet unit of a toilet system according to an embodiment of the present invention. FIG. 2 is a block diagram showing a communication system of the toilet system. FIG. 3 is a side view showing the positional relationship between a user seated on a toilet seat and the skin gas sensor. FIG. 4 is a cross-sectional view of the toilet seat and the skin gas sensor in FIG. 1 as viewed from the direction of arrow AA.

[0034] The toilet system 200 estimates the fatigue state (health state) of a user U. The toilet system 200 includes a toilet unit 2, an information terminal 60, and a management device 70. As shown in FIG. 1, the toilet unit 2 includes a toilet device 10, a skin gas sensor 40, and a stool sensor 51. The toilet device 10 is installed in a toilet room. The toilet device 10 includes a toilet bowl 11, a casing 12, a toilet seat 20, and a toilet lid 30. The toilet bowl 11 is a so-called seated toilet bowl. The toilet bowl 11 has a concave bowl portion 11a that is recessed downward. The toilet bowl 11 receives excrement such as urine and feces from the user U in the bowl portion 11a.

[0035] In this specification, the terms "upper," "lower," "front," "rear," "left side," and "right side" refer to directions as seen by a user U sitting on the toilet seat 20 with their back to the open toilet lid 30.

[0036] The casing 12 is installed on top of the toilet bowl 11. The casing 12 may be attached integrally to the toilet bowl 11, or may be detachably attached to the toilet bowl 11. The casing 12 houses a plurality of functional parts for operating the functions of the toilet unit 2. The functional parts include, for example, an opening / closing unit that controls the opening and closing of the toilet seat 20 and the toilet lid 30, a toilet seat heating unit that controls the temperature of the toilet seat 20, a private parts washing unit that cleans private parts of the human body, a deodorizing unit that reduces odorous components, and a communication unit that can communicate with a remote control, an information terminal 60, and the like. These functional parts are provided as needed. The casing 12 also houses a control unit 15 that controls these functional parts and a memory unit 17 that stores information about the functional parts.

[0037] The toilet seat 20 has an outer edge curved to match the external shape of the toilet bowl 11, and is pivotally supported relative to the casing 12. The toilet seat 20 has an opening 20a that penetrates into the bowl portion 11a. As shown in FIG. 1, this example shows a so-called O-shaped toilet seat 20 with the opening 20a formed in the center of the toilet seat 20. The toilet seat 20 is not limited to an O-shape and may be U-shaped or the like. A user U can defecate into the bowl portion 11a while sitting on the toilet seat 20. The toilet seat 20 has a seating portion 21 on which the user U sits, a bottom portion 22 facing the seating portion 21, and a recessed portion 23 recessed from the seating portion 21 toward the bottom portion 22.

[0038] Seating section 21 forms the upper surface of toilet seat 20 when toilet seat 20 is placed on toilet bowl 11 in the closed state, and is the part on which user U sits. Bottom section 22 faces the top surface of toilet bowl 11 in the vertical direction when closed. A heater wire and a heat insulating material are provided inside toilet seat 20 to keep seating section 21 warm. Also provided inside toilet seat 20 is a skin gas sensor 40, which will be described later.

[0039] As shown in FIG. 4, the recessed portion 23 is provided inside the toilet seat 20. The recessed portion 23 is provided in a portion of the toilet seat 20 that is located below the thigh U1 of a user U seated on the seating portion 21. As shown in FIG. 1, in this example, the recessed portion 23 is provided to the left of the center in the left-right direction of the toilet seat 20. In other words, the recessed portion 23 is located below the left thigh U1 of a user U seated on the toilet seat 20. Note that the recessed portion 23 may also be provided to the right of the center in the left-right direction of the toilet seat 20.

[0040] Recess 23 has sidewall 23a extending from seat 21 toward bottom 22, and undersurface 23b connecting the lower ends of sidewall 23a. The upper side of recess 23 is covered by seat 21. That is, recess 23 is located on the undersurface 21b side of seat 21, and forms space S that is surrounded above, below, in front, behind, left, and right sides. Skin gas sensor 40 is provided in this space S.

[0041] The seat 21 has a through-hole 24 that penetrates from the upper surface 21a to the lower surface 21b at a position corresponding to the recess 23. The through-hole 24 connects the space S to the outside of the toilet seat 20. The through-hole 24 serves as a gas flow path that guides skin gas G emitted from the thighs U1 of a user U seated on the seat 21 into the space S of the recess 23. Here, skin gas refers to gas containing volatile components that is emitted from the surface of a person's body. The emission pathways of skin gas can be classified into surface-reaction-derived pathways, in which components of sweat and sebum interact with resident bacteria and are emitted from the skin surface; skin gland-derived pathways, in which components in blood volatilize and are emitted directly from the skin; and blood-derived pathways, in which components in blood volatilize and are emitted directly from the skin. In this example, blood-derived skin gas is the target. The through-hole 24 may be provided with a filter (not shown) that allows gas to pass through but blocks liquid from passing through. This can prevent water and the like from entering the inside of the recessed portion 23.

[0042] The toilet lid 30 is pivotally supported on the casing 12. When closed, the toilet lid 30 covers the toilet seat 20. The toilet lid 30 is provided as needed and can be omitted.

[0043] Skin gas sensor 40 is provided in toilet device 10 and detects skin gas G emitted from the skin of user U. Skin gas sensor 40 detects skin gas G derived from the blood of user U. Skin gas sensor 40 can be, for example, a semiconductor gas sensor, an electrochemical sensor, a gas heat transfer sensor, a surface acoustic wave sensor, a catalytic combustion sensor, an optical sensor, a carbon nanotube sensor, a graphene sensor, an optical fiber sensor, a thin film sensor, a MEMS thermal conduction sensor, a micro thermoelectric sensor, an electromotive force change sensor, a gas chromatography measurement sensor, a VOC (volatile organic compound) sensor, or the like.

[0044] Skin gas sensor 40 is provided on toilet seat 20. Specifically, as shown in FIG. 4 , skin gas sensor 40 is located below upper surface 21a of seating portion 21 and provided in recess 23. That is, skin gas sensor 40 is provided in recess 23 without contacting thigh U1 of user U. Skin gas G emitted from thigh U1 of user U flows into space S through through-hole 24. Skin gas sensor 40 detects skin gas G that has filled space S. The detection results of skin gas sensor 40 are transmitted to management device 70 via information terminal 60, which will be described later. Management device 70 estimates the fatigue state of user U based on the detection results of skin gas sensor 40.

[0045] The seating sensor 45 detects whether the user U sits on or leaves the toilet seat 20. The seating sensor 45 is a contact sensor such as a tactile switch, electrostatic sensor, or strain sensor provided on the toilet seat 20. The seating sensor 45 may also be a pyroelectric sensor or distance sensor (infrared sensor) provided on the casing 12. The detection result of the seating sensor 45 is transmitted to the management device 70 via the information terminal 60 described below. The seating sensor 45 is provided as needed.

[0046] The stool sensor 51 is provided inside the casing 12. The stool sensor 51 has, for example, a light-emitting element that emits light toward the stool and a light-receiving element that receives light reflected from the stool, and detects the presence or absence of stool and its condition. The light-emitting element is, for example, a light-emitting element such as an LED. The light-receiving element has a lens and a light-receiving element. The light-emitting element is, for example, formed by a line sensor or area sensor in which CCD sensors or CMOS sensors are arranged. The light-receiving element may also have a spectroscopic function such as a spectral filter. The detection results of the stool sensor 51 are transmitted to the management device 70 via the information terminal 60, which will be described later.

[0047] Control unit 15 is provided inside casing 12. Control unit 15 is connected to skin gas sensor 40, seating sensor 45, and feces sensor 51. Control unit 15 transmits the detection results of skin gas sensor 40, seating sensor 45, and feces sensor 51 to information terminal 60 via a communication unit (not shown). Control unit 15 also controls the operation of functional units provided inside casing 12. Note that the control of the functional units may be performed by a control unit separate from control unit 15.

[0048] Memory unit 17 stores information on skin gas sensor 40, seat sensor 45, feces sensor 51, and functional unit information. Skin gas sensor 40 information includes the detection results of skin gas sensor 40. Seat sensor 45 information includes the detection results of seat sensor 45. Feces sensor 51 information includes the detection results of feces sensor 51. Memory unit 17 also stores a program for controlling the operation of the functional units. Control unit 15 operates the functional units based on the program stored in memory unit 17.

[0049] The information terminal 60 is, for example, a smartphone or tablet terminal owned by the user U. However, the information terminal 60 is not limited to these and may be any terminal usable by the user U, such as a PC terminal. The information terminal 60 may be, for example, a remote control for operating the functional units of the toilet device 10. The information terminal 60 has a control unit 60a and a notification unit 60b.

[0050] The information terminal 60 is directly connected to the toilet device 10 via wireless communication. The information terminal 60 is capable of communicating with the toilet device 10 according to a Bluetooth (registered trademark) standard such as BLE (Bluetooth Low Energy). The information terminal 60 is also connected to the management device 70 via a network (e.g., the Internet). The information terminal 60 transmits various pieces of information transmitted from the toilet device 10 to the management device 70. The information terminal 60 also transmits various pieces of information transmitted from the management device 70 to the toilet device 10.

[0051] A program (application software) for using the toilet system 200 is installed in the information terminal 60. The control unit 60a operates the toilet system 200 based on the program. The control unit 60a also causes the notification unit 60b to notify various pieces of information transmitted from the toilet device 10 and the management device 70. The notification unit 60b is, for example, a display screen that displays various pieces of information. The notification unit 60b may also be an audio output unit that notifies various pieces of information by voice. The notification unit 60b notifies the fatigue state estimation result estimated by the control unit 70a of the management device 70.

[0052] The management device 70 is installed at a location away from the toilet room. The management device 70 is, for example, a cloud server, and is connected to the information terminal 60 via a network. The management device 70 may be installed in a building in which the toilet room is installed. The management device 70 has a control unit 70a and a storage unit 70b.

[0053] The control unit 70a estimates the fatigue state of the user U based on the detection results of the skin gas sensor 40 and the detection results of the stool sensor 51. The memory unit 70b stores a program for skin gas and stool property control processing for estimating the fatigue state of the user U.

[0054] FIG. 5 is an explanatory diagram showing a series of flows of the behavior of a user who uses the toilet unit and the control process for estimating the fatigue state.

[0055] First, after entering the toilet, the user U performs personal authentication using the information terminal 60. The user U, for example, starts up application software on the information terminal 60, and performs personal authentication between the user U and the toilet device 10. Note that any method may be used to perform personal authentication of the user U who has entered the toilet, as long as it is possible to perform personal authentication of the user U.

[0056] Furthermore, the toilet system 200 obtains consent from the user U to skin gas detection and feces detection. For example, the toilet system 200 obtains consent from the user U to skin gas detection and feces detection by the user U operating the information terminal 60. Note that the toilet system 200 may obtain consent from the user U to skin gas detection and feces detection by any method. When consent from the user U is obtained, the toilet system 200 becomes available for use.

[0057] Thereafter, when user U sits on toilet seat 20, sensor detection is performed by skin gas sensor 40 and stool sensor 51. That is, skin gas sensor 40 detects skin gas G emitted from user U's skin (thigh U1). Stool sensor 51 detects stool excreted by user U. Control unit 15 of toilet device 10 transmits the detection results of skin gas sensor 40 and stool sensor 51 to information terminal 60. In addition, information terminal 60 transmits the received detection results to management device 70 together with the user's unique identification information.

[0058] When user U leaves the toilet seat 20, sensor detection by the skin gas sensor 40 and the stool sensor 51 ends. The control unit 15 of the toilet device 10 transmits the end of detection by the skin gas sensor 40 and the stool sensor 51 to the information terminal 60. The information terminal 60 also transmits the end of detection together with the user's unique identification information to the management device 70. Note that the control unit 15 of the toilet device 10 may transmit the detection results while the user was sitting on the toilet seat 20 to the information terminal 60 together after the user leaves the toilet seat 20.

[0059] Control unit 70a of management device 70 estimates the fatigue state of user U from the detection results of skin gas sensor 40 and stool sensor 51. A calibration curve showing the relationship between known gas amounts and the output value of skin gas sensor 40 is stored in memory unit 70b of management device 70. Control unit 70a calculates the difference between the output value of skin gas sensor 40 detected when user U is seated on toilet seat 20, for example, and the maximum output value of skin gas sensor 40 detected while user U is seated on toilet seat 20.

[0060] It should be noted that skin gas from the user U who previously used the toilet device 10 may remain in the recess 23. Therefore, the control unit 70a may determine that the fatigue state cannot be estimated if the output value of the skin gas sensor 40 detected when the user U sits on the toilet seat 20 is equal to or greater than a predetermined value.

[0061] The control unit 70a calculates the amount E of skin gas G (hereinafter referred to as gas amount E) by applying the calculated difference value to a calibration curve stored in the memory unit 70b. The gas amount E is, for example, a diffusion flux. The fatigue state of the user U may be estimated from the concentration of skin gas G.

[0062] The control unit 70a also calculates the condition of the stool from the detection result of the stool sensor 51. The condition of the stool is, for example, a stool property Bs based on the Bristol scale. That is, the control unit 70a calculates whether the detected stool is hard stool (rabbit feces), hard stool, slightly hard stool, normal stool, slightly soft stool, muddy stool, or watery stool.

[0063] The control unit 70a estimates the fatigue state of the user U based on the calculated gas amount E and stool properties Bs. The control unit 70a transmits the calculated gas amount E, stool properties Bs, and the estimated results of the fatigue state of the user U to the information terminal 60. The control unit 60a of the information terminal 60 causes the notification unit 60b to notify the received gas amount E, stool properties Bs, and estimated results of the fatigue state. The user U can recognize his or her own fatigue state by checking the notification unit 60b. The control unit 70a also stores the estimated results of the gas amount E, stool properties Bs, and fatigue state in the memory unit 70b.

[0064] Next, the skin gas and stool condition control process executed by the control unit 70a will be described with reference to Fig. 6. The control unit 70a estimates the stress state as the fatigue state of the user U. The stress state includes mental stress and physical stress. Mental stress is, for example, stress felt by the mind of the user U. Physical stress is, for example, stress felt by the body of the user U, such as muscle fatigue.

[0065] The control unit 70a can estimate the stress state based on the amount of ammonia gas emitted from the user U's skin and the characteristics of the stool. Ammonia is mainly produced in the intestines through the breakdown of proteins and transported to the liver via the blood. Ammonia is metabolized to urea in the liver and excreted from the body. In this case, when a person feels mental fatigue and their autonomic nervous system is disturbed, liver function declines. As a result, the urea metabolism of ammonia does not progress, and the ammonia concentration in the blood increases. Ammonia is highly volatile, so it evaporates from the blood and is emitted from the body surface. Note that the control unit 70a may estimate the stress state using, for example, dimethyl trisulfide or allyl mercaptan, rather than ammonia gas. On the other hand, when a person feels mental fatigue or their autonomic nervous system is disturbed, their stool becomes watery or hard.

[0066] FIG. 6 is a flowchart showing the skin gas and stool property control process executed by the control unit. The control process shown in FIG. 6 is stored in advance in the storage unit 70b of the management device 70.

[0067] Here, the user U performs an initial setting before using the toilet system 200. This initial setting is to store the amount of ammonia gas emitted from the skin of the user U as an initial value in the memory unit 70b. Note that the initial setting is preferably performed when the user U is not feeling fatigue (stress).

[0068] After user U is personally authenticated using information terminal 60, he or she operates information terminal 60 to input initial settings and sits on toilet seat 20. Skin gas sensor 40 detects ammonia gas emitted from the skin (thigh U1) of user U seated on toilet seat 20. In this case, through-hole 24 of toilet seat 20 is blocked by user U's thigh U1 when he or she is seated. Therefore, gases other than skin gas G are prevented from entering depression 23 from the air. This allows skin gas sensor 40 to efficiently detect ammonia gas emitted from user U.

[0069] The control unit 15 of the toilet device 10 transmits the output value of the skin gas sensor 40 to the information terminal 60. The information terminal 60 transmits the received output value of the skin gas sensor 40 as initial setting information together with the user's unique identification information to the management device 70 via the Internet.

[0070] Control unit 70a of management device 70 stores gas amount E calculated from the output value (difference value) of skin gas sensor 40 transmitted from information terminal 60 in memory unit 70b as an initial value. Control unit 70a stores this initial value as threshold Ex in memory unit 70b. Note that threshold Ex may be calculated based on the initial value. The initial value and threshold Ex are stored in memory unit 70b in association with identification information unique to the user. The initial value may be the result of a single detection by skin gas sensor 40 detected at initial settings, or may be the average of multiple detection results by skin gas sensor 40 detected at initial settings. Threshold Ex may be a value previously stored in memory unit 70b.

[0071] When the initial value and threshold value Ex are stored in memory unit 70b in the initial setting, control unit 70a estimates user U's fatigue state (stress state) based on S201 to S211 of FIG. 6. That is, skin gas sensor 40 detects ammonia gas while seat sensor 45 detects seating on toilet seat 20. Stool sensor 51 detects stool excreted in toilet bowl 11. Control unit 70a estimates user U's fatigue state based on the detected amount E of ammonia gas and stool property Bs. Note that stool property Bs may use the property of the currently excreted stool, or the property of the stool excreted by user U in the past (for example, the previous time).

[0072] In S201, it is determined whether or not feces have been detected. That is, the control unit 70a determines whether or not the feces sensor 51 has detected the presence of feces (whether or not the user U has excreted feces). If it is determined "YES" in S201, that is, that feces have been detected, the process proceeds to S202. On the other hand, if it is determined "NO" in S201, that is, that feces have not been detected, the process proceeds to S203.

[0073] In S202, the stool property Bs is calculated. That is, the control unit 70a calculates the property of the stool excreted this time based on the detection result of the stool sensor 51. The control unit 70a stores the calculated stool property Bs in the memory unit 70b, linking it to the user's unique identification information and the date and time of detection.

[0074] In S203, the past stool condition Bs is acquired. That is, if the user U has not excreted, the control unit 70a acquires the stool condition Bs of the user U calculated in the past (previous time) from the storage unit 70b.

[0075] In the next step S204, the amount E of ammonia gas is calculated. That is, control unit 70a calculates the amount E of gas from the output value of skin gas sensor 40 transmitted from information terminal 60. Control unit 70a also acquires threshold Ex of identification information that is the same as the user-specific identification information transmitted from information terminal 60. Control unit 70a also stores the calculated amount E of gas in memory unit 70b.

[0076] In S205, it is determined whether the gas amount E is equal to or greater than the threshold value Ex (E≧Ex). The control unit 70a compares the currently calculated gas amount E with the threshold value Ex. If S205 returns "YES," that is, if it is determined that the gas amount E is equal to or greater than the threshold value Ex, the process proceeds to S206. On the other hand, if S205 returns "NO," that is, if it is determined that the gas amount E is less than the threshold value Ex, the process proceeds to S209.

[0077] In S206, it is determined whether the stool condition Bs satisfies a predetermined condition. This predetermined condition is an undesirable state of the stool condition Bs. The predetermined condition is, for example, hard stool or watery stool. The predetermined condition may also include hard stool and muddy stool. The control unit 70a determines whether the stool condition Bs calculated in S202 or the stool condition Bs acquired in S203 is hard stool or watery stool.

[0078] If S206 returns "YES," i.e., if it is determined that the stool condition Bs satisfies the predetermined conditions, the process proceeds to S207. On the other hand, if S206 returns "NO," i.e., if it is determined that the stool condition Bs does not satisfy the predetermined conditions, the process proceeds to S208.

[0079] In S207, it is estimated that mental stress is present. That is, if the currently calculated ammonia gas amount E is large (greater than or equal to the threshold value Ex) and the stool condition Bs is poor (hard stool or watery stool), the control unit 70a estimates that mental stress is present and ends the process. The control unit 70a also transmits a mental stress signal to the information terminal 60. The information terminal 60 issues a notification based on the mental stress signal from the notification unit 60b. The control unit 70a also stores the estimation result in the memory unit 70b.

[0080] In S208, it is estimated that physical stress is present. That is, even if the currently calculated amount of ammonia gas E is large (greater than or equal to the threshold value Ex), if the stool condition Bs is good (for example, normal stool), the control unit 70a estimates that physical stress is present and ends the process. The control unit 70a also transmits a physical stress signal to the information terminal 60. The information terminal 60 issues a notification based on the physical stress signal from the notification unit 60b. The control unit 70a also stores the estimation result in the memory unit 70b.

[0081] In S209, it is determined whether or not the stool condition Bs satisfies a predetermined condition. In S209, the same control process as in S206 is executed. Then, if S209 returns "YES", that is, if it is determined that the stool condition Bs satisfies the predetermined condition, the process proceeds to S210. On the other hand, if S209 returns "NO", that is, if it is determined that the stool condition Bs does not satisfy the predetermined condition, the process proceeds to S211.

[0082] In S210, it is estimated that the cause is dietary (no mental stress or physical stress). That is, if the currently calculated amount of ammonia gas E is small (less than the threshold Ex) but the stool condition Bs is poor (hard stool or watery stool), the control unit 70a estimates that the mental stress and physical stress are low but the cause of the poor stool condition is dietary-derived by the user U, and the process ends. The control unit 70a also transmits a food-derived signal to the information terminal 60. The information terminal 60 issues a notification based on the food-derived signal from the notification unit 60b. The control unit 70a also stores the estimation result in the memory unit 70b.

[0083] In S211, it is estimated to be normal. That is, if the currently calculated ammonia gas amount E is small (less than the threshold value Ex) and the stool condition Bs is good (for example, normal stool), the control unit 70a estimates it to be normal and ends the process. Furthermore, the control unit 70a transmits a normal signal to the information terminal 60. The information terminal 60 issues a notification based on the normal signal from the notification unit 60b. Furthermore, the control unit 70a stores the estimation result in the memory unit 70b.

[0084] Next, the content notified by the notifying unit 60b of the information terminal 60 will be described. FIG. 7 is an explanatory diagram showing an example of the detection result of the skin gas sensor displayed on the notification unit of the information terminal. FIG. 8 is an explanatory diagram showing an example of the detection result of the feces sensor displayed on the notification unit of the information terminal. FIG. 9 is an explanatory diagram showing an example of a case where the control unit estimates mental stress. FIG. 10 is an explanatory diagram showing an example of a case where the control unit estimates physical stress. FIG. 11 is an explanatory diagram showing an example in which the control unit estimates that the state of stool is of dietary origin. FIG. 12 is an explanatory diagram showing an example of a case where the control unit has estimated the state to be normal.

[0085] As shown in FIG. 7, the notification unit 60b of the information terminal 60 displays, for example, the amount E of ammonia gas emitted from the user U. The notification unit 60b may also display a comparison between the current gas amount E and the initial value of the gas amount of the user U. As shown in FIG. 7, the notification unit 60b displays that the skin gas score, which is calculated by converting the current amount E of ammonia gas emitted from the user U into a score (point), is 70 points. The skin gas score is, for example, 0 to 50 points representing "low: no stress" and 51 to 100 points representing "high: stressed." The notification unit 60b may also display the amount of ammonia gas or the gas concentration.

[0086] Notification unit 60b of information terminal 60 may display only the current detection result of skin gas sensor 40, or may display the current detection result of skin gas sensor 40 as well as the previous detection results of skin gas sensor 40. Notification unit 60b of information terminal 60 may also display changes in the detection results of skin gas sensor 40 in the form of a diagram or graph. Examples of diagrams and graphs showing changes in the detection results of skin gas sensor 40 include scatter plots and bar graphs. Diagrams and graphs showing changes in the detection results of skin gas sensor 40 may also display moving averages or medians. In the example of FIG. 7, notification unit 60b of information terminal 60 displays a line indicating the initial value of user U along with a scatter plot showing changes in the detection results of skin gas sensor 40 over a one-week period.

[0087] Notification unit 60b of information terminal 60 can display, for example, the detection results of skin gas sensor 40 on a daily, weekly, monthly, or yearly basis, allowing user U to understand changes over time in the detection results of skin gas sensor 40.

[0088] As shown in FIG. 8, the notification unit 60b of the information terminal 60 displays the stool condition of the user U. Stool conditions are classified into seven stages, ranging from hard stool to watery stool. In the example of FIG. 8, the notification unit 60b displays that the stool condition is watery stool. The notification unit 60b can display the detection results of the stool sensor 51, for example, on a daily, weekly, monthly, or yearly basis. This allows the user U to understand changes over time in the detection results of the stool sensor 51.

[0089] As shown in Fig. 9, when notification unit 60b receives a mental stress signal (estimated as "Mental stress present" in S207 in Fig. 6), it notifies that mental stress is present. In the example of Fig. 9, notification unit 60b displays that mental stress is high and a stress score calculated from the detection results of skin gas sensor 40 and stool sensor 51. The stress score is calculated based on, for example, the amount of ammonia gas E and stool properties Bs. For example, the stress score increases as the amount of ammonia gas E increases.

[0090] The notification unit 60b also notifies users of suggestions that can help alleviate mental stress. For example, the notification unit 60b notifies users of suggestions that encourage exercise or sleep in order to alleviate mental stress. In the example of FIG. 9, the notification unit 60b displays, "Have you been feeling tired lately? Your stress score is high. Try to get enough sleep." By checking the notification unit 60b, the user U can recognize that he or she is experiencing (high) mental stress and how to relieve the mental stress.

[0091] As shown in Fig. 10, when notification unit 60b receives a physical stress signal (estimated as "physical stress present" in S208 in Fig. 6), it notifies that physical stress is present. In the example of Fig. 10, notification unit 60b displays that the physical stress is high and a stress score calculated from the detection results of skin gas sensor 40 and stool sensor 51. The stress score is calculated based on, for example, the amount of ammonia gas E and the stool properties Bs. For example, the stress score increases as the amount of ammonia gas E increases.

[0092] The notification unit 60b also notifies the user of suggestions that can help alleviate physical stress. For example, the notification unit 60b may notify the user of suggestions such as taking a bath or getting a massage to relieve physical stress. In the example of FIG. 10, the notification unit 60b displays, "You appear tired. A massage can relieve your physical fatigue." By checking the notification unit 60b, the user U can recognize that he or she has (high) physical stress and how to relieve the physical stress.

[0093] As shown in FIG. 11, when notification unit 60b receives a food-derived signal (estimated as "food-derived" in S210 in FIG. 6), it notifies that the poor stool condition Bs is caused by food. In the example of FIG. 11, notification unit 60b displays that stress is relatively low and a stress score calculated from the detection results of skin gas sensor 40 and feces sensor 51. The stress score is calculated based on, for example, the amount of ammonia gas E and stool condition Bs. The stress score increases, for example, when the amount of ammonia gas E is high.

[0094] The notification unit 60b also notifies the user of recommendations for normalizing the stool condition Bs. The notification unit 60b notifies, for example, recommendations for improving dietary habits in order to alleviate the deterioration of the stool condition Bs. In the example of FIG. 11, the notification unit 60b displays, "You're managing your stress well. <Dietary Habits Warning> Have your eating habits been irregular lately? Try to eat a balanced diet slowly." By checking the notification unit 60b, the user U can recognize that he or she has no (low) mental stress and physical stress and can recognize ways to alleviate the deterioration of the stool condition Bs.

[0095] As shown in Fig. 12, when notification unit 60b receives a normal signal (estimated as "normal" in S211 in Fig. 6), it notifies that the condition is normal. In the example of Fig. 12, notification unit 60b displays that stress is relatively low and a stress score calculated from the detection results of skin gas sensor 40 and stool sensor 51. The stress score is calculated based on, for example, the amount of ammonia gas E and the stool condition Bs. For example, the stress score increases when the amount of ammonia gas E is high.

[0096] The notification unit 60b also notifies the user of a recommendation for maintaining a normal state. In the example of Fig. 12, the notification unit 60b displays, "You're doing well. Keep going like this." By checking the notification unit 60b, the user U can recognize that he or she is not under mental or physical stress and that the stool condition Bs is good.

[0097] The effects of the toilet system 200 will be described below. The toilet system 200 estimates the fatigue state of the user U based on the detection results of the skin gas sensor 40 and the feces sensor 51 provided in the toilet device 10. The notification unit 60b then notifies the user U of the fatigue state estimated by the control unit 70a.

[0098] That is, the control unit 70a estimates whether the user U is experiencing mental stress (mental fatigue) and physical stress (muscular fatigue) based on the detection results of the skin gas sensor 40. The control unit 70a then estimates whether the user U is experiencing mental stress (mental fatigue) or physical stress (muscular fatigue) based on the stool condition Bs of the user U. This allows the user U to understand the state of fatigue. Furthermore, the user U can also check their state of fatigue when using the toilet device 10 in their daily lives.

[0099] The skin gas sensor 40 detects ammonia gas. The toilet system 200 can estimate the fatigue state of the user U based on the ammonia gas emitted from the skin.

[0100] The control unit 70a calculates the amount E of skin gas based on the detection result of the skin gas sensor 40. The toilet system 200 can estimate the level of fatigue state of the user U based on the amount E of skin gas.

[0101] The control unit 70a calculates the properties of the stool based on the detection results of the stool sensor 51. By detecting the properties of the stool, the toilet system 200 can estimate the fatigue state in more detail.

[0102] The control unit 70a estimates that the user U is experiencing mental stress when the amount of skin gas E is equal to or greater than the threshold value Ex and the state of the stool satisfies a predetermined condition. The toilet system 200 can estimate mental stress, which is part of the fatigue state, based on the amount of skin gas E and the state of the stool.

[0103] The control unit 70a estimates that the user U is experiencing physical stress when the amount of skin gas E is equal to or greater than the threshold value Ex and the state of the stool does not satisfy a predetermined condition. The toilet system 200 can estimate the physical stress component of the fatigue state based on the amount of skin gas E and the state of the stool.

[0104] If the amount of skin gas E is less than the threshold value Ex and the state of the stool satisfies a predetermined condition, the control unit 70a estimates that the user U is not under mental or physical stress and that the cause of the state of the stool is due to the diet of the user U. Based on the amount of skin gas E and the state of the stool, the toilet system 200 can estimate that the cause of the poor stool quality is not mental or physical stress but rather due to the diet.

[0105] The toilet system 200 further includes a memory unit 70b that stores the detection results of the stool sensor 51, and when the stool sensor 51 does not detect stool, the control unit 70a estimates the fatigue state based on the detection results of the skin gas sensor 40 and the past detection results of the stool sensor 51 stored in the memory unit 70b. Even when the user U does not excrete stool, the toilet system 200 can estimate the fatigue state using the past stool detection results.

[0106] The notification unit 60b notifies the user U of the advice on the fatigue state, thereby enabling the user U to deal with the estimated fatigue state.

[0107] When it is estimated that the user U is under mental stress, the notification unit 60b notifies the user U of a suggestion that will lead to the alleviation of the mental stress. This allows the user U to recognize how to relieve the mental stress.

[0108] Skin gas sensor 40 is provided in recess 23, located below upper surface 21a of seating portion 21. This allows skin gas sensor 40 to efficiently detect ammonia gas that fills space S within recess 23.

[0109] The control unit 70a estimates the fatigue state of the user U based on the detection results of the skin gas sensor 40 and the detection results of the feces sensor 51 detected while the user U is seated on the toilet seat 20. This allows the toilet system 200 to accurately estimate the fatigue state of the user U.

[0110] In the above-described embodiment, an example has been described in which the control unit 70a of the management device 70 estimates the health condition of the user U. However, the present invention is not limited to this, and the health condition of the user U may be estimated by the control unit 15 of the toilet device 10 or the control unit 60a of the information terminal 60, for example.

[0111] In the above-described embodiment, the management device 70 and the information terminal 60 are communicatively connected via a network. However, the present invention is not limited to this. For example, the toilet device 10 and the management device 70 may be communicatively connected via a network. In other words, the detection results of the skin gas sensor 40 and the like may be transmitted to the management device 70 without going through the information terminal 60.

[0112] In the above-described embodiment, an example has been described in which the health condition is estimated based on the amount of skin gas detected while the seating sensor 45 detects that the user is sitting on the toilet seat 20. However, the present invention is not limited to this, and for example, the seating sensor 45 may not be provided. In this case, the health condition may be estimated based on the amount of skin gas detected for a predetermined time period from when the user U is personally authenticated (or until the personal authentication is released).

[0113] Embodiments may include the following features.

[0114] (Configuration 1) a toilet device having a toilet seat on which a user sits; a skin gas sensor provided in the toilet device and configured to detect skin gas emitted from the skin of the user; a stool sensor provided in the toilet device for detecting the state of stool excreted into the toilet device; a control unit that estimates a fatigue state of the user based on a detection result of the skin gas sensor and a detection result of the stool sensor; A toilet system comprising: an alarm unit that notifies the estimation result of the control unit. (Configuration 2) 2. The toilet system according to claim 1, wherein the skin gas sensor detects ammonia gas. (Configuration 3) 3. The toilet system according to claim 1, wherein the control unit calculates the amount of skin gas based on the detection result of the skin gas sensor. (Configuration 4) 4. The toilet system according to any one of configurations 1 to 3, wherein the control unit calculates the properties of the stool based on the detection result of the stool sensor. (Configuration 5) The toilet system described in any one of configurations 1 to 4, wherein the control unit estimates that the user is experiencing mental stress when the amount of skin gas is equal to or greater than a threshold value and the state of the stool satisfies predetermined conditions. (Configuration 6) The toilet system described in any one of configurations 1 to 5, wherein the control unit estimates that the user is experiencing physical stress when the amount of skin gas is equal to or greater than a threshold value and the state of the stool does not satisfy predetermined conditions. (Configuration 7) The toilet system of any one of configurations 1 to 6, wherein the control unit, when the amount of skin gas is less than a threshold value and the condition of the stool satisfies predetermined conditions, estimates that the user is not under mental or physical stress and that the cause of the condition of the stool is due to the user's diet. (Configuration 8) The device further includes a storage unit that stores the detection result of the feces sensor, The toilet system of any one of configurations 1 to 7, wherein when the feces sensor does not detect the feces, the control unit estimates the fatigue state based on the detection result of the skin gas sensor and past detection results of the feces sensor stored in the memory unit. (Configuration 9) The toilet system according to any one of configurations 1 to 8, wherein the notification unit notifies the user of a recommendation for dealing with the fatigue state. (Configuration 10) The toilet system according to configuration 9, wherein the notification unit notifies the user of a suggestion that will lead to relief of mental stress when it is estimated that the user is suffering from mental stress. (Configuration 11) The toilet seat is a seating section on which the user sits; a bottom portion facing the seating portion; a recessed portion recessed from the seating portion toward the bottom portion; and 11. The toilet system according to any one of configurations 1 to 10, wherein the skin gas sensor is provided in the recessed portion, positioned below the upper surface of the seating portion. (Configuration 12) The toilet device further includes a seat sensor that detects whether the user is sitting on the toilet seat. The toilet system according to any one of configurations 1 to 11, wherein the control unit estimates the fatigue state based on the detection results of the skin gas sensor and the detection results of the feces sensor detected while the user is seated on the toilet seat.

[0115] The above describes embodiments of the present invention. However, the present invention is not limited to these descriptions. Design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they incorporate the features of the present invention. For example, the shape, dimensions, materials, arrangement, installation form, etc. of each element of a toilet system are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they incorporate the features of the present invention. [Explanation of symbols]

[0116] 2 Toilet Unit 10 Toilet equipment 11 Toilet 11a Bowl section 12 Casing 15 Control Unit 17 Memory section 20 toilet seats 20a opening 21 Seating area 21a Top side 21b Bottom side 22 Bottom 23 Recess 23a Side wall part 23b Bottom part 24 through holes 30 toilet lid 40 Skin gas sensor 45 Seat sensor 51 Feces sensor 60 Information terminal 60a Control unit 60b Notification Department 70 Management device 70a Control section 70b Storage section 200 Toilet System G Skin gas S space U User U1 thigh

Claims

1. a toilet device having a toilet seat on which a user sits; a skin gas sensor provided in the toilet device and configured to detect skin gas emitted from the skin of the user; a stool sensor provided in the toilet device for detecting the state of stool excreted into the toilet device; a control unit that estimates a fatigue state of the user based on a detection result of the skin gas sensor and a detection result of the stool sensor; A toilet system comprising: an alarm unit that notifies the estimation result of the control unit.

2. 2. The toilet system according to claim 1, wherein the skin gas sensor detects ammonia gas.

3. The toilet system according to claim 1 , wherein the control unit calculates the amount of the skin gas based on the detection result of the skin gas sensor.

4. The toilet system according to claim 1, wherein the control unit calculates the properties of the stool based on the detection result of the stool sensor.

5. The toilet system according to claim 3, characterized in that the control unit estimates that the user is experiencing mental stress when the amount of skin gas is above a threshold and the state of the stool satisfies a predetermined condition.

6. The toilet system described in claim 3, characterized in that the control unit estimates that the user is experiencing physical stress when the amount of skin gas is above a threshold value and the state of the stool does not meet a predetermined condition.

7. The toilet system described in claim 3, characterized in that when the amount of skin gas is less than a threshold value and the condition of the stool meets predetermined conditions, the control unit assumes that the user is not under mental or physical stress and that the cause of the condition of the stool is due to the user's diet.

8. The device further includes a storage unit that stores the detection result of the feces sensor, The toilet system described in claim 1, characterized in that when the feces sensor does not detect the feces, the control unit estimates the fatigue state based on the detection results of the skin gas sensor and past detection results of the feces sensor stored in the memory unit.

9. The toilet system according to claim 1 , wherein the notification unit notifies the user of a recommendation for the fatigue state.

10. The toilet system according to claim 9, wherein the notification unit notifies the user of a suggestion that will lead to relief of mental stress when it is estimated that the user is suffering from mental stress.

11. The toilet seat is a seating section on which the user sits; a bottom portion facing the seating portion; a recessed portion recessed from the seating portion toward the bottom portion; and 2. The toilet system according to claim 1, wherein the skin gas sensor is provided in the recessed portion, positioned below an upper surface of the seat.

12. The toilet device further includes a seat sensor that detects whether the user is sitting on the toilet seat. The toilet system according to claim 1, wherein the control unit estimates the fatigue state based on the detection results of the skin gas sensor and the detection results of the feces sensor detected while the user is seated on the toilet seat.

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