Bathroom system

Abstract

To prevent a reduction in the accuracy of estimating a change in the state in a bathroom.SOLUTION: A bathroom system according to an embodiment comprises: a radio wave sensor that is installed in a bathroom formed of a plurality of panels and detects a change in the state in the bathroom; and state estimation means that estimates a change in the state in the bathroom on the basis of output data from the radio wave sensor. The state estimation means estimates a change in the state in a space in the bathroom, with an exclusion of a radio wave reflection area including the surface of the panels.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The disclosed embodiments relate to a bathroom system. [Background technology]

[0002] In recent years, technologies have been provided for estimating the state of various objects by sensing, etc. For example, as a method for detecting the state of a user in a bathroom, a technology is known in which a radio wave radar is provided to estimate the user's posture, etc., and if there is an abnormality such as a fall, an alert is given by displaying, notifying, sounding, etc. (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-158862 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-described conventional technology has room for improvement. For example, when detecting a user's movements in a relatively small bathroom surrounded by walls, the above-described conventional technology may experience strong reflections from the walls, making it difficult to distinguish from a human body, making it difficult to suppress a decrease in estimation accuracy. As such, the above-described conventional technology has room for improvement in terms of suppressing a decrease in accuracy when estimating state changes in a bathroom. Therefore, it is desirable to suppress a decrease in the accuracy of estimating state changes in a bathroom.

[0005] In view of the above, the challenge is to prevent a decline in the accuracy of estimating changes in the state of the bathroom.

[0006] The disclosed embodiment aims to provide a bathroom system that can suppress a decrease in the accuracy of estimating changes in conditions within a bathroom. [Means for solving the problem]

[0007] A bathroom system according to one aspect of the embodiment is installed in a bathroom formed by a plurality of panels and comprises a radio wave sensor that detects state changes within the bathroom, and a state estimation means that estimates state changes within the bathroom based on output data from the radio wave sensor, wherein the state estimation means estimates state changes in the space within the bathroom by excluding radio wave reflection areas including the surfaces of the panels.

[0008] For example, radio waves are strongly reflected by panels (wall surfaces), making it difficult to detect signals from objects such as people inside. Therefore, according to one aspect of the embodiment, a bathroom system excludes the position of the panel from the detection area, making it possible to accurately estimate the position and movement of objects such as people inside the bathroom without being affected by the strong reflected radio wave signals, and to appropriately estimate changes in the state of the bathroom (also called "bathroom"). This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom.

[0009] In a bathroom system according to one aspect of the embodiment, a metal plate that constitutes the radio wave reflection area is arranged on the back side of the plurality of panels.

[0010] For example, in a bathroom (unit bath) where the bathtub, washing area, walls, ceiling, etc. are integrated, steel plates are used on the walls, which strongly reflect signals. Therefore, according to one aspect of the embodiment, since metal plate panels have particularly strong reflection of radio waves, excluding the position of the panels from the detection area makes it possible to accurately estimate the position and movement of objects such as people and appropriately estimate changes in the state of the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, in the case of a unit bath, the walls are made of metal steel plates, and therefore the reflection strength from the wall surface is particularly high, so they are excluded.

[0011] In one aspect of the embodiment, the bathroom system includes a state estimation means for estimating state changes in the space within the bathroom by excluding areas where water droplets are attached on the surface of the panel as the radio wave reflection areas.

[0012] For example, depending on the material of the panel, reflection may not be very strong. However, if water adheres to the panel while the user is using the bathroom, the reflection of radio waves increases, making it difficult to detect people. Therefore, according to one aspect of the bathroom system, by excluding areas where water droplets are likely to adhere, the position and movement of objects such as people can be accurately estimated, and changes in the state of the bathroom can be appropriately estimated. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, in bathroom systems using traditional construction methods, materials such as wood may not have a high reflection intensity, but water droplets that form during use increase the reflection intensity, so these materials are excluded.

[0013] In one aspect of the embodiment, the state estimation means estimates state changes in the space within the bathroom, excluding the four corner areas of the bathroom.

[0014] For example, panels are joined at angles close to a right angle (90 degrees), and irradiating radio waves near these areas can result in mutual reflection between the panels, resulting in increased radio wave intensity. Therefore, according to one aspect of the embodiment, a bathroom system excludes these four corner areas, enabling accurate estimation of the position and movement of objects such as people and appropriate estimation of changes in the state of the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimation of changes in the state of the bathroom. For example, in the bathroom system, corners of the wall surfaces are excluded because they strongly reflect radio waves.

[0015] In one aspect of the embodiment, the bathroom system is configured such that the state estimation means estimates changes in the state of the bathroom based on data excluding received data obtained by reflection from the radio wave reflection area.

[0016] For example, when using a bathroom, water droplets adhere sparsely. The water droplets increase the reflection of radio waves, causing variations in the reflected radio waves and making it difficult to detect people. Therefore, according to one aspect of the embodiment, a bathroom system can accurately estimate the position and movement of objects such as people by excluding signals from areas where water droplets are likely to adhere, thereby enabling appropriate estimation of changes in the state of the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, in a bathroom system, water droplets increase reflection intensity, but the intensity varies due to sparse water droplets, which can easily lead to noise reduction, so they are excluded.

[0017] In one aspect of the embodiment, the bathroom system includes a state estimation means for estimating state changes within the bathroom based on data excluding noise data based on vibration components input to the radio wave sensor.

[0018] For example, it is assumed that vibrations with a constant period are not from a person, but from a washing machine or other device that may be placed in a changing room. Therefore, according to one aspect of the embodiment, by excluding signals that vibrate with a constant period, the bathroom system can accurately estimate the position and movement of objects such as people and appropriately estimate changes in state within the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in state within the bathroom. For example, in the bathroom system, vibrations from a washing machine in a changing room may cause a bathtub or other object to shake, which could be mistaken for a person. In this case, the vibrations are excluded because they are from a washing machine in a changing room.

[0019] In one aspect of the embodiment, the bathroom system is configured such that the state estimation means estimates state changes within the bathroom based on data that excludes noise data based on objects present within the bathroom.

[0020] For example, signals reflected from objects often lack a velocity component. Therefore, according to one aspect of the embodiment, a bathroom system can accurately estimate the position and movement of objects such as people by excluding signals with small velocity components as noise, thereby enabling appropriate estimation of state changes within the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating state changes within the bathroom. For example, in the bathroom system, a bath stool, washbasin, and other items placed in the bathroom increase their reflection intensity when wet, becoming noise sources. However, these items are characterized by not moving, i.e., lacking a velocity component, and can therefore be excluded.

[0021] In one aspect of the embodiment, the bathroom system includes a radio wave sensor installed at a position higher than the top end of a bathtub installed in the bathroom.

[0022] For example, because radio waves cannot penetrate water, placing a sensor lower than a bathtub, where water is likely to accumulate, may result in radio waves not spreading sufficiently throughout the bathroom. Therefore, according to one aspect of the bathroom system, by placing a sensor higher than the bathtub, it is possible to accurately estimate the positions and movements of objects, such as people, throughout the bathroom and appropriately estimate changes in the state of the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, in a bathroom system, the bathtub is often filled with water, and if the sensor were placed lower than the bathtub, the radio waves would be absorbed by the bathwater, making it impossible to grasp the entire bathroom. Therefore, the sensor is placed higher than the bathtub.

[0023] In one aspect of the embodiment, the detection range of the radio wave sensor includes a pillow portion provided in a bathtub installed in the bathroom.

[0024] For example, there is a high possibility that a person's head will be placed on the pillow portion of a bathtub. However, the bathtub water cannot be detected by radio waves. Therefore, according to one aspect of the embodiment, a bathroom system can increase the possibility of detecting body parts that are out of the bathtub water by including the pillow portion in the detection range, thereby enabling appropriate estimation of changes in the bathroom state. This allows the bathroom system to suppress a decrease in the accuracy of estimation of changes in the bathroom state. For example, in a bathroom system, in order to determine the status of a person in the bathtub, it is necessary to detect the head that is out of the water, so the radio wave sensor is positioned so that its detection range includes the pillow side (pillow portion) where the head is located.

[0025] In one aspect of the embodiment, the bathroom system includes a radio wave sensor provided on a panel of the plurality of panels forming the bathroom other than the panel on which the entrance to the bathroom is provided.

[0026] For example, a wall with an entrance may vibrate when the door is opened or closed, causing the sensor to shake and adversely affect detection. Therefore, according to one aspect of the bathroom system, by installing a sensor at a location other than the entrance, stable detection becomes possible, enabling the bathroom to appropriately estimate changes in state within the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in state within the bathroom. For example, in a bathroom system, a sensor can be installed on the side of the bathroom near the bathtub, but the side with the entrance is excluded from the installation locations because the sensor would shake due to the vibrations caused by opening and closing the door.

[0027] In one aspect of the embodiment, the plane direction of the antenna surface of the radio wave sensor intersects with the surface of the panel on which the radio wave sensor is installed.

[0028] For example, radio waves are primarily emitted in the normal direction to the antenna surface. For example, radio waves spread evenly from the normal direction perpendicular to the antenna surface. Therefore, if the antenna is installed parallel to the wall, it may be difficult to observe the entire bathroom unless the sensor is placed in the center of the bathroom. Therefore, according to one aspect of the bathroom system, by installing the antenna surface at an angle rather than parallel to the panel surface (i.e., the surfaces intersect), the detection area can be tilted left and right, up and down, or both, from the normal direction of the panel surface. This allows the bathroom system to detect the entire bathroom without placing the sensor in the center of the bathroom, thereby reducing restrictions on the sensor installation location. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom condition. For example, in a bathroom system, tilting the sensor's antenna surface relative to the wall eliminates the need to place the sensor in the center of the bathroom, increasing the flexibility of sensor placement.

[0029] In one aspect of the embodiment, the bathroom system has an antenna surface of the radio wave sensor arranged facing the center of the bathroom.

[0030] For example, radio waves are primarily emitted in the normal direction relative to the antenna's surface. Therefore, according to one aspect of the bathroom system, by positioning the antenna's surface facing the center of the bathroom, the entire bathroom can be used as a detection area without placing the sensor in the center of the bathroom, reducing restrictions on sensor placement. This allows the bathroom system to minimize a decrease in the accuracy of estimating changes in the bathroom's condition.

[0031] In one aspect of the embodiment, the state estimation means executes a first mode for estimating the movement or position of a user within the bathroom, and a second mode for estimating the breathing of a user located in a bathtub installed within the bathroom.

[0032] For example, the amount of movement to be detected differs significantly between detecting a person's position and detecting a person's breathing. For example, breathing requires detecting even very small movements. For example, when collecting a person's vital signs (biological information), such as breathing status and heart rate, human movement can become noise, so it is necessary to distinguish between observing a person's position and observing breathing, etc. Therefore, according to one aspect of the embodiment, by switching modes, a bathroom system can accurately detect even slight movements and appropriately estimate changes in the bathroom status. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom status. For example, in the bathroom system, by switching modes and differentiating the signal processing content, minute fluctuations in vital signs can be observed.

[0033] A bathroom system according to one aspect of the embodiment includes a mode switching means for switching between the first mode and the second mode based on operation of an operating unit installed in the bathroom.

[0034] According to one aspect of the embodiment, a bathroom system can appropriately estimate changes in the bathroom state by switching modes based on the operation of an operating unit. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom state. For example, by allowing the bathroom system to switch modes at the user's discretion, it is expected that the bathroom system will be able to accurately detect changes in the bathroom state, such as when the user is not moving.

[0035] The bathroom system according to one aspect of the embodiment includes a mode switching means for switching between the first mode and the second mode based on the position of a user in the bathroom.

[0036] According to one aspect of the embodiment, a bathroom system can appropriately estimate changes in the bathroom condition by switching modes based on the user's location. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom condition. For example, the bathroom system switches modes based on the user's location, and when the user enters the bathtub, the system switches to vital sign measurement mode because there is no need to detect the user's position due to reduced movement.

[0037] In a bathroom system according to one aspect of the embodiment, the detection range of the radio wave sensor includes a first space including a bathtub installed in the bathroom and a second space including the water discharge area of ​​a shower device installed in the bathroom.

[0038] According to one aspect of the embodiment, a bathroom system can accurately estimate changes in the bathroom condition by setting both a first space including a bathtub and a second space including a water discharge area of ​​a shower device as the detection range. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom condition. For example, the bathroom system switches based on the position of a person, separating an area for detecting breathing from an area for detecting position.

[0039] In one aspect of the embodiment, the bathroom system includes a first radio wave sensor having a detection range that includes a first space including a bathtub installed in the bathroom, and a second radio wave sensor that detects a second space that includes the water discharge area of ​​a shower device installed in the bathroom, and the output data includes first output data from the first radio wave sensor and second output data from the second radio wave sensor.

[0040] According to one aspect of the embodiment, a bathroom system uses multiple radio wave sensors to appropriately estimate changes in the bathroom state. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the bathroom state. For example, the bathroom system switches between sensors that detect breathing and sensors that detect position based on the person's position.

[0041] The bathroom system according to one aspect of the embodiment includes a determination means for determining whether or not an object other than the user is present within the detection range of the radio wave sensor based on output data from the radio wave sensor.

[0042] According to one aspect of the embodiment, a bathroom system can appropriately estimate changes in the state of the bathroom by determining the presence or absence of objects other than the user within the detection range of the radio wave sensor based on output data from the radio wave sensor. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, in the bathroom system, since objects other than the user cause noise, the accuracy can be improved by excluding the signals from the bathroom system when making a determination.

[0043] In one aspect of the embodiment, the state estimation means estimates an abnormal state as a state change in the bathroom based on the determination result of the determination means.

[0044] According to one aspect of the embodiment, a bathroom system can appropriately estimate a state change in the bathroom by estimating an abnormal state in the bathroom based on the result of determining whether or not there is an object other than the user. This allows the bathroom system to suppress a decrease in the accuracy of estimating a state change in the bathroom. For example, the bathroom system can take appropriate action if an abnormal state, such as a fall, occurs.

[0045] In one aspect of the embodiment, the state estimation means estimates body movement or movement posture from the water discharge area of ​​a shower device installed in the bathroom to a bathtub installed in the bathroom.

[0046] According to one aspect of the embodiment, a bathroom system can accurately estimate changes in the bathroom state by estimating the user's body movement or posture toward the bathtub from the water discharge area of ​​a shower device installed in the bathroom. This allows the bathroom system to prevent a decrease in the accuracy of estimating changes in the bathroom state. For example, the bathroom system can identify movements toward the bathtub or under the shower and proactively operate the device, allowing for switching. Furthermore, for example, the bathroom system can also assess the user's physical decline (e.g., frailty) by determining whether the user's body is supported differently from usual when moving toward the bathtub.

[0047] In one aspect of the embodiment, the bathroom system is configured such that the state estimation means estimates the user's movements within a water discharge area of ​​a shower device installed in the bathroom.

[0048] According to one aspect of the embodiment, a bathroom system can accurately estimate changes in the state of the bathroom by estimating the user's movements within the water discharge area of ​​a shower device installed in the bathroom. This allows the bathroom system to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. For example, the bathroom system can quickly respond to whether the user is expressing their intention through gestures.

[0049] In one aspect of the embodiment, the bathroom system includes a state estimation means for estimating the respiratory state of a user positioned in a bathtub installed in the bathroom.

[0050] According to one aspect of the embodiment, a bathroom system can estimate the respiratory condition of a user positioned in a bathtub installed in a bathroom, thereby enabling appropriate estimation of changes in the bathroom condition. This allows the bathroom system to suppress a decrease in the accuracy of estimation of changes in the bathroom condition. For example, in the bathroom system, since the user is stationary (sitting, etc.) in the bathtub and does not move much, it is easy to detect slight movements such as breathing status and heart rate. [Effects of the Invention]

[0051] According to one aspect of the embodiment, it is possible to suppress a decrease in the accuracy of estimating changes in the state of the bathroom. [Brief explanation of the drawings]

[0052] [Figure 1] FIG. 1 is a plan view showing an example of a bathroom to which a bathroom system according to an embodiment is applied and a changing room adjacent to the bathroom. [Figure 2] FIG. 2 is a diagram showing an example of the interior of a bathroom to which the bathroom system according to the embodiment is applied. [Figure 3] FIG. 3 is a block diagram showing an example of a configuration related to control of the bathroom system according to the embodiment. [Figure 4] FIG. 4 is a block diagram showing an example of a configuration related to state estimation according to the embodiment. [Figure 5] FIG. 5 is a flowchart illustrating an example of a processing procedure executed by the bathroom system. [Figure 6] FIG. 6 is a diagram showing an example of a point cloud detected by the radio wave sensor of the bathroom system. [Figure 7] FIG. 7 is a diagram showing an example of the intensity distribution of radio waves received by the radio wave sensor of the bathroom system. [Figure 8] FIG. 8 is a diagram showing an example of the distribution of Doppler velocities of radio waves received by the radio wave sensor of the bathroom system. [Figure 9] FIG. 9 is a diagram showing an example of a point cloud detected by the radio wave sensor of the bathroom system. [Figure 10] FIG. 10 is a diagram showing an example of the arrangement of antennas of radio wave sensors. [Figure 11] FIG. 11 is a diagram showing an example of the arrangement of antennas of radio wave sensors. [Figure 12] FIG. 12 is a diagram showing another example of the configuration of the bathroom system. DETAILED DESCRIPTION OF THE INVENTION

[0053] Hereinafter, embodiments of the bathroom system disclosed in the present application will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below.

[0054] <1. Embodiment> <1-1. Bathroom system application examples> First, an overview of the information processing executed in a bathroom system 1 according to an embodiment (see FIG. 3) will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing an example of a bathroom to which a bathroom system according to an embodiment is applied, and a changing room adjacent to the bathroom. FIG. 2 is a diagram showing an example of the interior of a bathroom to which a bathroom system according to an embodiment is applied. Note that the arrangement of radio wave sensor 10a shown in FIGS. 1 and 2 is just one example, and other arrangement examples will be described later.

[0055] In Figures 1 and 2, the bathroom system 1 is applied to a space (water space) including a bathroom 2, which is a bathroom, and a changing room 3, which is a space (adjacent room) adjacent to the bathroom 2, and estimates changes in the state of the space within the bathroom 2.

[0056] For example, bathroom 2 is a room composed of four side panels 2a, 2b, 2c, and 2d, a floor panel 2e, and a ceiling panel 2f. Note that side panels 2a, 2b, 2c, and 2d, floor panel 2e, and ceiling panel 2f may be simply referred to as panels 2a to 2f. Hereinafter, the surface of panels 2a to 2f facing the space inside bathroom 2 will be referred to as the "front surface," and the surface opposite the front surface, facing outside bathroom 2, will be referred to as the "back surface." For example, a metal plate that forms a radio wave reflection area is disposed on the back surface of each of the multiple panels 2a to 2f.

[0057] Of the four side panels 2a, 2b, 2c, and 2d, side panel 2d adjacent to the changing room 3 is partially open, forming a doorway 21 for entering and exiting the bathroom 2 from the changing room 3, and doorway 21 is provided with a door 22 that can be opened and closed. For example, a user of the bathroom 2 (also simply referred to as the "user") opens door 22, enters the bathroom 2 from the changing room 3 through doorway 21, and then closes door 22 to take a bath, shower, or other actions in the bathroom 2. Inside the bathroom 2, a bathtub 4, bathroom counter 5, shower device 6, mirror 7, shower bar 8, and other facilities are arranged. Figure 1 shows a user U positioned inside the bathroom 2.

[0058] The bathtub 4 is arranged along the side panel 2b of the bathroom 2, extending from one side panel 2a adjacent to the side panel 2b to the other side panel 2c, and is configured as a roughly rectangular shape in a top view. For example, the bathtub 4 has an end 41 on the side panel 2a side, an end 42 on the side panel 2b side, an end 43 on the side panel 2c side, and an end 44 on the side panel 2d side in a top view. For example, when bathing, a user positions their body in the longitudinal direction, i.e., along the ends 42 and 44, in a top view. In this way, the user bathes by positioning their head on the end 43 side of the bathtub 4, using the end 43 as a pillow, and their feet on the end 41 side. The end 43, which serves as a pillow, may be provided with a member (such as an air cushion) to stabilize the person's head.

[0059] The overhead shower 6a of the shower device 6 is a fixed shower head fixed to the ceiling panel 2f of the bathroom 2. The side panel 2a of the bathroom 2 may be equipped with a radio wave sensor 10a that emits radio waves into the bathroom 2 and a control unit 100 (see FIG. 3) that controls the water discharge from the shower device 6 based on the signal detected by the radio wave sensor 10a. A fixed shower head refers to a shower head in which the shower head or the piping supporting the shower head is fixed to the ceiling panel or side panel, and includes not only shower heads with a fixed water discharge direction but also shower heads with a variable water discharge direction. The area in the bathroom 2 other than where the bathtub 4 is located, such as an area that includes at least the area where the overhead shower 6a discharges water, may also be referred to as the "washing area."

[0060] The bathroom counter 5 is a shelf attached to the side panel 2a below the shower bar 8 and mirror 7, and extends horizontally at a predetermined height. The mirror 7 is attached to the side panel 2a to the side of the shower bar 8, and is configured as a vertically long rectangle.

[0061] As described above, an overhead shower 6a is fixed to the ceiling panel 2f. A shower bar 8, a mirror 7, and a bathroom counter 5 are attached to one of the side panels 2a of the bathroom 2. The radio wave sensor 10a may be provided on the front side of the side panel 2a, i.e., the side facing the bathroom 2 (front surface), or on the back side of the side panel 2a, i.e., the side facing outside the bathroom 2 (back surface).

[0062] 1 and 2, radio wave sensor 10a is provided on panel 2a, other than panel 2d, which is provided with entrance / exit 21 to bathroom 2, among multiple panels 2a to 2f that form bathroom 2. In this way, radio wave sensor 10a is provided on panels 2a to 2c, 2e, and 2f, other than panel 2d, which is provided with entrance / exit 21 to bathroom 2, among multiple panels 2a to 2f that form bathroom 2.

[0063] As shown in Figure 1, radio wave sensor 10a is installed in bathroom 2, which is a bathroom formed by multiple panels 2a to 2f, and detects changes in the state of bathroom 2. For example, radio wave sensor 10a is a radio wave radar. Radio wave sensor 10a irradiates radio waves into bathroom 2 and receives the reflected radio waves.

[0064] The detection range of radio wave sensor 10a is set to a predetermined range for detecting changes in the state of bathroom 2. For example, the detection range of radio wave sensor 10a includes a first space including a bathtub 4 installed in bathroom 2 and a second space including a water discharge area of ​​shower device 6 installed in bathroom 2. In FIG. 1, the range including the space where bathtub 4 is located (approximately half the space on the left side) corresponds to the first space. Also in FIG. 1, the range including the area where water is discharged by overhead shower 6a corresponds to the second space.

[0065] The detection range of radio wave sensor 10a includes end 43, which functions as the headboard of bathtub 4 installed in bathroom 2. For example, the detection range (e.g., the distance range over which radio waves can be received) of radio wave sensor 10a may include the back surface of at least one of panels 2a-2f that make up bathroom 2. For example, the detection range of radio wave sensor 10a may include an area exceeding at least one of panels 2a-2f that make up bathroom 2. For example, the detection range of radio wave sensor 10a may include the four corners of bathroom 2 when viewed from above. Note that the detection range of radio wave sensor 10a is not limited to the above and can be set to any range as long as the desired detection is possible. In addition, in FIGS. 1 and 2, radio wave sensor 10a is installed at a position higher than the top of bathtub 4 installed in bathroom 2. Note that the above-described placement of radio wave sensor 10a is merely an example, and radio wave sensor 10a may be installed at a position lower than the top of bathtub 4 installed in bathroom 2, for example, when floor panel 2e or the like is included in the detection range.

[0066] The shower device 6 is a shower device capable of shower water discharge and spout water discharge, and has an overhead shower 6a fixed to the ceiling panel 2f, a hand shower 6b held on the shower bar 8, and a spout 6c attached to the side panel 2a.

[0067] The overhead shower 6a is fixed to the ceiling panel 2f of the bathroom 2 and is configured to spray shower water from above toward the bather. In Figures 1 and 2, the overhead shower 6a is located closer to the side panels 2a and 2d than to the side panels 2b and 2c when viewed from above. In other words, of the four corners of the bathroom 2 when viewed from above, the overhead shower 6a is located closer to the corner where the side panel 2a, on which the mirror 7 and other components are mounted, intersects with the side panel 2d on the opposite side of the bathtub 4, and is configured to spray shower water from above the bather's head in front of the mirror 7.

[0068] The shower bar 8 is attached to the side panel 2a and includes a bar member 8a and a head holder 8b that holds the hand shower 6b. The bar member 8a is a vertically extending bar-shaped member fixed to the side panel 2a, extending parallel to the side panel 2a at a predetermined distance. The head holder 8b is attached to the bar member 8a so that it can slide up and down and be adjusted to any height above the bar member 8a. The head holder 8b is configured to hold the hand shower 6b, which can be removed from the head holder 8b for use. In other words, the hand shower 6b is not fixed to the side panel 2a. The hand shower 6b can be used by holding it in the user's hand or by holding it in the head holder 8b. A handrail can also be provided as a bar-shaped member attached to the side panel of the bathroom 2.

[0069] Based on the user's operation of each component of shower apparatus 6, shower apparatus 6 discharges water from the component corresponding to the user's operation in a manner appropriate to the user's operation. For example, when a user operates overhead shower 6a, shower apparatus 6 discharges water from overhead shower 6a in a manner appropriate to the user's operation. For example, bathroom system 1 may accept the user's operation of each component of shower apparatus 6 through physical components such as switches and levers. Bathroom system 1 may also accept the user's gestures, hand signals, etc., through sensors or the like as the user's operation of each component of shower apparatus 6.

[0070] Note that the configuration is merely an example, and the configuration of bathroom 2, etc. is not limited to the above. For example, bathroom 2 may be provided with an operation unit (e.g., an operation panel, etc.) that accepts user operations. For example, an operation unit such as an operation panel may have a display device that displays information and an operation device that accepts operations from any person, such as a user (also referred to as an "operator"). For example, the operation unit is used for mode switching operations, etc., as described below. Furthermore, the above-described manner of accepting user operations for each component of shower apparatus 6 is merely an example, and bathroom system 1 may accept user operations for each component of shower apparatus 6 in various ways. For example, bathroom system 1 may accept user operations for each component of shower apparatus 6 via an operation unit provided in bathroom 2. Furthermore, bathroom system 1 may accept operations for each component of shower apparatus 6 by a user outside bathroom 2 (e.g., changing room 3).

[0071] <1-2. Bathroom system configuration example> Next, an example of the configuration of bathroom system 1 will be described with reference to Figures 3 and 4. Figure 3 is a block diagram showing an example of the configuration related to control of the bathroom system according to the embodiment. Figure 4 is a block diagram showing an example of the configuration related to state estimation according to the embodiment.

[0072] Bathroom system 1 includes, as control-related components (bathroom control system), shower device 6, microphone 9, sensor unit 10, control unit 100, data storage unit 101, input unit 102, notification unit 103, lighting 104, water temperature control unit 105a, water volume control unit 105b, bathtub water temperature control unit 106, shoulder bath / waist bath control unit 107, air conditioning 108, and ventilation fan 109. Note that the control-related components shown in Figure 3 are merely an example, and the control-related components of bathroom system 1 are not limited to the configuration shown in Figure 3. For example, if bathroom system 1 does not have shoulder bath or waist bath functions, bathroom system 1 does not need to include shoulder bath / waist bath control unit 107.

[0073] Shower device 6 has a water discharge / stop control unit 60a (indicated as ON / OFF in FIG. 3) that switches water discharge from the overhead shower 6a (indicated as OH in FIG. 3) on and off. For example, a flow path (water supply path) controlled by water discharge / stop control unit 60a is connected to the overhead shower 6a, and water discharge from the overhead shower 6a is switched on and off according to the control of water discharge / stop control unit 60a.

[0074] Shower device 6 also has a water discharge / stop control unit 60b (labeled ON / OFF in FIG. 3) that switches water discharge from hand shower 6b (labeled HS in FIG. 3) on and off. For example, a flow path (water supply path) controlled by water discharge / stop control unit 60b is connected to hand shower 6b, and water discharge from hand shower 6b is switched on and off according to the control of water discharge / stop control unit 60b.

[0075] Shower device 6 also has a water discharge / stop control unit 60c (labeled "ON / OFF" in FIG. 3) that switches water discharge from spout 6c (labeled "faucet" in FIG. 3) on and off. For example, a flow path (water supply passage) controlled by water discharge / stop control unit 60c is connected to spout 6c, and water discharge from spout 6c is switched on and off according to the control of water discharge / stop control unit 60c. Water discharge / stop control units 60a-60c may be solenoid valves, etc.

[0076] Microphone 9 is a sensor device (microphone) that detects sound. When bathroom system 1 performs personal identification by sound, microphone 9 detects the human voice for the personal identification. When bathroom system 1 performs abnormality inference by sound, microphone 9 detects the sound in bathroom 2 for the abnormality inference.

[0077] The microphone 9 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100. The microphone 9 transmits the acquired information to the control unit 100. The microphone 9 may perform detection in response to instructions from the control unit 100. For example, the microphone 9 is placed in a position where it can detect sound in a desired space, such as the bathroom 2 or the changing room 3. The microphone 9 may be included in the sensor unit 10. Furthermore, when the bathroom system 1 accepts input by sound, the microphone 9 may function as part of the input unit 102.

[0078] Sensor unit 10 has a sensor device that detects information used by bathroom system 1 for control. For example, sensor unit 10 functions as a detection means that detects changes in the state of the bathroom. Sensor unit 10 is connected to control unit 100 so as to be able to send and receive signals (information) to and from control unit 100. Sensor unit 10 transmits the acquired information to control unit 100. Sensor unit 10 may perform detection in response to instructions from control unit 100. For example, sensor unit 10 is installed in a bathroom formed by multiple panels and has a sensor device for detecting changes in the state of the bathroom. Sensor unit 10 has a radio wave sensor 10a.

[0079] 4, the radio wave sensor 10a is connected to the control unit 100 so as to be able to send and receive information to and from the control unit 100. The radio wave sensor 10a outputs data (output data) in response to receiving radio waves. The radio wave sensor 10a transmits the output data to the control unit 100 in response to receiving radio waves.

[0080] Here, we will briefly explain the processing performed by radio wave sensor 10a. Radio wave sensor 10a radiates radio waves into bathroom 2 and receives the reflected radio waves. For example, radio wave sensor 10a radiates radio waves in all directions to scan bathroom 2. The radio waves radiated from radio wave sensor 10a are radiated in all directions to cover the entire detection range of radio wave sensor 10a. Radio wave sensor 10a receives reflected waves of the radiated radio waves. In this way, radio wave sensor 10a radiates radio waves radially into bathroom 2 and detects the radio waves that are reflected back.

[0081] Furthermore, the radio wave sensor 10a radiates radio waves of a predetermined frequency into the bathroom 2 at predetermined time intervals and receives the reflected radio waves. For example, the radio wave sensor 10a radiates millimeter waves in the 60 GHz frequency band and receives the reflected waves. Note that the above is merely an example, and any frequency can be used for the radio waves radiated by the radio wave sensor 10a as long as the desired processing can be performed. For example, the radio waves radiated by the radio wave sensor 10a are preferably in the 24 GHz to 3 THz band, and more preferably in the 60 GHz to 79 GHz band.

[0082] The radio wave sensor 10a can detect how far radio waves emitted in each direction have propagated before being reflected. This provides coordinate information for the point at which the radio waves are reflected, and the radio wave sensor 10a detects objects (reflecting objects) that are located within the detection range of the radio wave sensor 10a and that reflect the radio waves emitted by the radio wave sensor 10a as a point cloud (see, for example, FIG. 6). Note that the detection performed by the radio wave sensor 10a is similar to that performed by conventional radio wave radar, and therefore a detailed description thereof will be omitted.

[0083] Furthermore, sensor unit 10 is not limited to radio wave sensor 10a and may include any other sensor. For example, sensor unit 10 may include a door sensor that detects whether bathroom door 22 is open or closed. For example, sensor unit 10 may include multiple radio wave sensors 10a, including a radio wave sensor 10a for estimating the movement or position of a user in bathroom 2 and a radio wave sensor 10a for estimating the respiratory state of the user in bathroom 2. In this way, sensor unit 10 may include multiple radio wave sensors 10a, which will be described later.

[0084] The control unit 100 is an information processing device that performs various types of information processing in the bathroom system 1. The control unit 100 performs various types of information processing based on information detected by the sensor unit 10, microphone 9, etc. For example, the control unit 100 estimates state changes in the bathroom 2 based on signals detected by the radio wave sensor 10a. The control unit 100 receives output data from the radio wave sensor 10a, such as signals detected by the radio wave sensor 10a, and estimates state changes in the bathroom 2 based on the received output data from the radio wave sensor 10a. For example, the control unit 100 estimates the user's movement or position based on the signal detected by the radio wave sensor 10a. For example, the control unit 100 estimates the user's movement or position within the detection range of the radio wave sensor 10a.

[0085] The control unit 100 is also a control device that controls the bathroom system 1. For example, the control unit 100 controls water discharge. The control unit 100 controls notifications by the notification unit 103. The control unit 100 performs various controls based on information detected by the sensor unit 10, microphone 9, etc. For example, the control unit 100 controls the water discharge mode by the shower device 6 based on information detected by the sensor unit 10. The control unit 100 controls the output of information by the notification unit 103 based on information detected by the sensor unit 10, microphone 9, etc. In this case, the control unit 100 controls the water discharge mode of at least one of the overhead shower 6a, hand shower 6b, and spout 6c based on the output data of the radio wave sensor 10a.

[0086] For example, the control unit 100 has a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). For example, the control unit 100 performs various information processing such as state estimation by executing a program (e.g., a control program according to the present disclosure) stored in the control unit 100 or in a data storage unit 101, etc., using a RAM (Random Access Memory) or the like as a working area. The control unit 100 may also have an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

[0087] As shown in Fig. 4, the control unit 100 has a state estimation unit 110 and a determination unit 111. Note that the internal configuration of the control unit 100 is not limited to the configuration shown in Fig. 4, and may be any other configuration as long as it is capable of performing desired information processing.

[0088] The state estimation unit 110 functions as an estimation means that executes various estimation processes. For example, the state estimation unit 110 functions as a state estimation means that executes estimation processes related to various states. The state estimation unit 110 functions as a state estimation means that estimates state changes in the bathroom 2 based on output data from the radio wave sensor 10a. For example, the state estimation unit 110 estimates state changes in the bathroom 2 based on signals detected by the radio wave sensor 10a.

[0089] The state estimation unit 110 estimates state changes in the space within the bathroom 2 by excluding radio wave reflection areas including the surfaces of the panels 2a to 2f. The state estimation unit 110 estimates state changes in the space within the bathroom 2 by excluding areas with water droplets on the surfaces of the panels 2a to 2f as radio wave reflection areas. The state estimation unit 110 estimates state changes in the space within the bathroom 2 by excluding the four corner areas of the bathroom 2.

[0090] State estimation unit 110 estimates state changes within bathroom 2 based on data excluding received data obtained by reflection from the radio wave reflection area. State estimation unit 110 estimates state changes within bathroom 2 based on data excluding noise data based on vibration components input to radio wave sensor 10a. State estimation unit 110 estimates state changes within bathroom 2 based on data excluding noise data based on objects present in bathroom 2.

[0091] The state estimation unit 110 operates in a first mode to estimate the movement or position of a user in the bathroom 2, and in a second mode to estimate the breathing of a user positioned in a bathtub 4 installed in the bathroom 2. The state estimation unit 110 also functions as a mode switching means that switches between the first mode and the second mode based on the operation of an operation unit (e.g., an operation panel) installed in the bathroom 2. For example, the state estimation unit 110 switches between the first mode and the second mode in response to the user's operation of the operation unit installed in the bathroom 2.

[0092] The above is merely an example, and the state estimation unit 110 may perform switching in various ways. For example, the state estimation unit 110 may also function as a mode switching means that switches between the first mode and the second mode based on the user's position in the bathroom 2. In this case, the state estimation unit 110 may set the mode to the second mode when the user is located inside the bathtub 4, and may set the mode to the first mode when the user is located outside the bathtub 4.

[0093] For example, the state estimation unit 110 estimates a change in the state of the bathroom 2 using point cloud information obtained by detection by the radio wave sensor 10a. For example, the state estimation unit 110 estimates a moving object in the bathroom 2 using the point cloud information obtained by detection by the radio wave sensor 10a. For example, the state estimation unit 110 identifies a moving object in the bathroom 2 using the point cloud information obtained by detection by the radio wave sensor 10a.

[0094] For example, the state estimation unit 110 estimates that the identified moving object in the bathroom 2 is a user. For example, the state estimation unit 110 estimates the height of the identified user located in the bathroom 2 based on the vertical length of the point cloud corresponding to the user in the bathroom 2. For example, the state estimation unit 110 estimates the user's behavior in the bathroom 2 based on changes in the point cloud obtained by detection by the radio wave sensor 10a.

[0095] For example, the state estimation unit 110 estimates the user's movement in the bathroom 2 (such as stepping over into the bathtub 4) based on changes in the shape of the point cloud obtained by detection by the radio wave sensor 10a. For example, the state estimation unit 110 estimates the user's movement in the bathroom 2 based on changes in the position of the point cloud obtained by detection by the radio wave sensor 10a.

[0096] The above-described process is merely an example, and the state estimation unit 110 may estimate a state change in the bathroom 2 using various information. For example, the state estimation unit 110 may estimate a state change in the bathroom 2 using point cloud information when no user is located in the bathroom 2. For example, the state estimation unit 110 may estimate a state change in the bathroom 2 using point cloud information when no user is located in the bathroom 2 and point cloud information when a user is located in the bathroom 2. For example, the state estimation unit 110 may estimate the position and movement of a user in the bathroom 2 based on the difference between the point cloud information when no user is located in the bathroom 2 and the point cloud information when a user is located in the bathroom 2.

[0097] The state estimation unit 110 estimates that the state change in the bathroom 2 is an abnormal state based on the determination result of the determination unit 111. When the determination unit 111 determines that there is an abnormality with respect to a user located in the bathroom 2, the state estimation unit 110 estimates that there is an abnormal state in the bathroom 2. For example, when the determination unit 111 determines that the state of the user located in the bathroom 2 is abnormal, the state estimation unit 110 estimates that there is an abnormal state in the bathroom 2. For example, when the determination unit 111 determines that the posture of the user located in the bathroom 2 is abnormal, the state estimation unit 110 estimates that there is an abnormal state in the bathroom 2.

[0098] The state estimation unit 110 estimates the body movement or moving posture from the water discharge area of ​​the shower device 6 installed in the bathroom 2 to the bathtub 4 installed in the bathroom 2. The state estimation unit 110 estimates the user's movements within the water discharge area of ​​the shower device 6 installed in the bathroom 2. The state estimation unit 110 estimates the breathing state of the user located in the bathtub 4 installed in the bathroom 2. Note that the above-described processing is merely an example, and the state estimation unit 110 may estimate various state changes in the bathroom 2 using various information.

[0099] Furthermore, the state estimation unit 110 may have a function as information generation means for generating various types of information to be notified by the notification unit 103. In this case, the state estimation unit 110 generates various types of information using information acquired from other devices, information stored in the data storage unit 101, etc. The state estimation unit 110 generates information using information acquired from the sensor unit 10, etc. The state estimation unit 110 generates information using an estimation result.

[0100] The state estimation unit 110 generates various information such as a screen (image information) to be provided to an external information processing device by appropriately using various techniques. The state estimation unit 110 generates a screen (image information) to be provided to a display device or the like. For example, the state estimation unit 110 generates a screen (image information) to be provided to a display device or the like based on information stored in the data storage unit 101.

[0101] The state estimation unit 110 may generate a screen (image information) or the like by any process as long as it is possible to generate a screen (image information) or the like to be provided to an external information processing device. For example, the state estimation unit 110 generates a screen (image information) to be provided to a display device or the like by appropriately using various technologies related to image generation, image processing, etc. For example, the state estimation unit 110 generates a screen (image information) to be provided to a display device or the like by appropriately using various technologies such as Java (registered trademark).

[0102] The determination unit 111 functions as a determination means for making various determinations. The determination unit 111 determines whether or not an object other than the user is present in the detection range of the radio wave sensor 10a based on the output data of the radio wave sensor 10a. The determination unit 111 determines, based on the output data of the radio wave sensor 10a when the user is not in the bathroom 2, that an object other than the user is present in the detection range of the radio wave sensor 10a in an area where the intensity is equal to or greater than the threshold when the user is not in the bathroom 2.

[0103] For example, the determination unit 111 determines whether or not there is an object other than the user present in the detection range of the radio wave sensor 10a, using point cloud information obtained by detection by the radio wave sensor 10a. For example, the determination unit 111 may determine whether or not there is an object other than the user present in the detection range of the radio wave sensor 10a, using point cloud information when no user is present in the bathroom 2.

[0104] For example, the determination unit 111 may determine the presence or absence of an object other than the user present in the detection range of the radio wave sensor 10a by using point cloud information when no user is present in the bathroom 2 and point cloud information when a user is present in the bathroom 2. For example, the determination unit 111 may determine the presence or absence of an object other than the user present in the detection range of the radio wave sensor 10a based on the difference between the point cloud information when no user is present in the bathroom 2 and the point cloud information when a user is present in the bathroom 2. Note that the above is merely an example, and the determination unit 111 may determine the presence or absence of an object other than the user present in the detection range of the radio wave sensor 10a by appropriately using various information.

[0105] Furthermore, the determination unit 111 may estimate (determine) an abnormality in the user located in the bathroom 2. For example, the determination unit 111 determines whether or not the state of the user located in the bathroom 2 is abnormal. For example, the determination unit 111 determines whether or not the state of the user located in the bathroom 2 estimated by the state estimation unit 110 is abnormal.

[0106] For example, when the position of the user in the bathroom 2 remains stationary for a predetermined period of time, the determination unit 111 determines that the user's condition is abnormal. For example, the determination unit 111 determines whether the posture of the user in the bathroom 2 is abnormal. For example, the determination unit 111 determines whether the posture of the user in the bathroom 2 estimated by the state estimation unit 110 is abnormal. For example, the determination unit 111 determines that the user's condition is abnormal when the user is sleeping somewhere other than the bathtub 4 in the bathroom 2. Note that the above is merely an example, and the determination unit 111 may estimate (determine) that various states are abnormal.

[0107] Note that the control unit 100 may include units that perform various processes other than those described above. For example, the control unit 100 may include an acquisition unit that acquires various information used for the processes. For example, the control unit 100 may include an alarm control unit that controls the alarm unit 103. In this case, the control unit 100 controls the output of information by the alarm unit 103, for example, using the alarm control unit.

[0108] The control unit 100 may also have a personal identification unit that performs processing for personal identification (personal authentication) of the user. The personal identification unit functions as an identification means that performs processing for personal identification of the user. The personal identification unit may perform personal identification of the user who uses a wet space such as the bathroom 2. For example, the personal identification unit may perform personal identification of the user using sensor information detected by the sensor unit 10. The personal identification unit performs personal identification (personal authentication) using information such as the physique, posture, and gait of the person in the bathroom 2 obtained by detection by the radio wave sensor 10a.

[0109] For example, the personal identification unit may perform personal identification of a user based on point cloud information obtained by detection by the radio wave sensor 10a. For example, the personal identification unit may estimate that a user whose height is estimated based on the point cloud information obtained by detection by the radio wave sensor 10a is the user who used the bathroom space on the date and time the point cloud information was obtained.

[0110] The above is just one example, and any process may be used to identify a user using a wet space such as the bathroom 2, as long as it is possible to identify the user. For example, the personal identification unit may identify the user based on the user's operation (such as pressing a switch) on an operating unit or the like installed in the bathroom 2. The personal identification unit may also identify the user through voice recognition using voice recognition technology. The personal identification unit may also identify the user using fingerprint information detected from a location touched by the user. In this case, the sensor unit 10 may have a fingerprint sensor on a location touched by a person (such as a doorknob) on a door 22 or the like installed in the wet space. For example, smooth personal identification (personal authentication) is possible by using a person's biometric information.

[0111] The data storage unit 101 is a storage means (storage device) that stores various types of information. The data storage unit 101 is realized by, for example, a semiconductor memory element such as a RAM or a flash memory, or a storage device such as a hard disk or an optical disk. For example, the data storage unit 101 is a computer-readable recording medium that non-temporarily records data used by a control program. The data storage unit 101 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100.

[0112] Data storage unit 101 transmits the stored information to control unit 100 in response to a request from control unit 100. Data storage unit 101 stores information received from control unit 100. Data storage unit 101 is also connected to sensor unit 10 so as to be able to send and receive signals (information) to and from sensor unit 10, and stores information (sensor information) acquired by detection by sensor unit 10. Data storage unit 101 stores various types of information used for control in bathroom system 1.

[0113] The data storage unit 101 stores various information related to the space (wet space) including the bathroom 2 and the changing room 3. The data storage unit 101 stores the user's behavior history including information related to the user's behavior and status in the wet space. For example, the data storage unit 101 stores usage log data obtained from an analysis of the history (log) related to the use of the wet space as the user's behavior history.

[0114] The data storage unit 101 stores information regarding the user's use of the bathroom 2. For example, the data storage unit 101 stores the number of times the bathroom 2 has been used and the date and time of use. The data storage unit 101 also stores information regarding the user's bathing in the bathtub 4. For example, the data storage unit 101 stores the number of times the bath has been taken and the date and time of use. The data storage unit 101 also stores information regarding the user's use of the shower device 6. For example, the data storage unit 101 stores the number of times the shower device 6 has been taken and the date and time of use.

[0115] The data storage unit 101 stores information related to the cleaning of the wet space. For example, the data storage unit 101 stores information indicating the cleaning of the bathroom 2. For example, the data storage unit 101 stores the number of cleanings and the date and time of cleaning. For example, when multiple users are expected to use the space (wet space) including the bathroom 2 and the changing room 3, the data storage unit 101 stores information identifying the user (for example, a user ID) in association with the user's information.

[0116] The data storage unit 101 also stores information (also referred to as "user information") about users of the space (wet space) including the bathroom 2 and the changing room 3. For example, when multiple users of the wet space are expected, the data storage unit 101 stores user information including information for identifying each user (also referred to as "user identification information"). For example, the data storage unit 101 stores user information including user identification information indicating the physical characteristics of each user. For example, the data storage unit 101 stores user information including the height, weight, etc. of each user.

[0117] For example, the data storage unit 101 stores a list of users who have been pre-registered as users of the bathroom 2. The user list includes a list of users (e.g., multiple users such as a family) who have been pre-registered as users of the bathroom 2, as well as information used for personal identification (personal authentication) of each user included in the list. For example, the user list may include information indicating each user's physical characteristics, such as height, which is used for personal identification. Furthermore, if personal identification is performed by voice, the user list may also include audio information indicating the characteristics of each user's voice (audio).

[0118] Note that data storage unit 101 is not limited to the above and may store various types of information depending on the purpose. For example, data storage unit 101 stores information indicating conditions (also referred to as "abnormality estimation conditions") for estimating that an abnormality has occurred in bathroom 2. For example, data storage unit 101 stores information indicating abnormality estimation conditions including at least one of the following: a user has fallen in bathroom 2; the user has been in a low posture and has not moved for a predetermined period of time; an abnormal sound has been detected in bathroom 2; an abnormality related to the user's breathing has been detected; and an abnormality related to the user's heart rate has been detected.

[0119] For example, the data storage unit 101 stores external data. For example, the data storage unit 101 stores external data (external information) collected by other services, etc. For example, the data storage unit 101 stores information about a user collected by a terminal device (wearable terminal, etc.) carried by the user as external information. The data storage unit 101 stores information about the user's behavior collected by the user's terminal device as external information.

[0120] Note that the above is merely an example, and the data storage unit 101 stores various types of information used in processing. The data storage unit 101 stores information used for control. The data storage unit 101 stores information used by the control unit 100 to control various components such as the shower device 6. The data storage unit 101 stores various types of information used in estimation processing. The data storage unit 101 stores information used to estimate changes in the state of the bathroom. For example, the data storage unit 101 may store various types of detection information such as first detection information, which will be described later. For example, the data storage unit 101 may store various types of point cloud information such as first point cloud information, which will be described later.

[0121] Various types of information are input to the input unit 102. For example, the input unit 102 functions as a reception unit that receives input of various types of information. The input unit 102 is connected to the control unit 100 so as to be able to transmit and receive signals (information) to and from the control unit 100. The input unit 102 transmits the acquired information to the control unit 100. The input unit 102 may receive input in response to an instruction from the control unit 100.

[0122] Input unit 102 receives various operations from an operator, such as a manager of bathroom system 1 or a user of the space (wet space) including bathroom 2 and changing room 3. For example, input unit 102 may be integrated with a display device for displaying information. In this case, input unit 102 may accept various operations from the operator using buttons provided on the display device. Input unit 102 may also accept various operations from the operator via a display surface (e.g., a liquid crystal display) of the display device using a touch panel function.

[0123] For example, input unit 102 may have a display device that displays information and an operation device that accepts operations from an operator such as a user, and may function as an operation unit such as an operation panel. For example, input unit 102 may be placed in any location, such as a wet area or a living room of a residence in which bathroom 2 is installed. In this case, input unit 102 may also function as a remote control device that is placed in a residence in which bathroom 2 is installed, displays information about bathroom 2, and accepts operations related to bathroom 2. For example, the remote control device may have the function of input unit 102 and the function of notification unit 103, and may perform processes such as accepting operations from an operator, displaying information, and outputting audio.

[0124] Furthermore, for example, the input unit 102 may be provided in a terminal device (such as a display device) owned by the operator. The terminal device is a device used by the operator. The terminal device may be realized by, for example, a smartphone, a mobile phone, a PDA (Personal Digital Assistant), a tablet terminal, or a notebook PC (Personal Computer). For example, the terminal device may be a smartphone used by a family member or the like residing in a house in which the bathroom 2 is installed. For example, the terminal device may function as an output device that outputs information notified (transmitted) from the notification unit 103.

[0125] The notification unit 103 functions as a notification means for notifying various types of information. The notification unit 103 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100. The notification unit 103 performs various types of notifications in response to instructions from the control unit 100. For example, the notification unit 103 notifies a predetermined target person of information. The notification unit 103 notifies the predetermined target person of information by displaying the information, communicating the information, outputting the information as sound, etc.

[0126] For example, the notification unit 103 has a configuration with a communication function such as a communication circuit or a communication device, and transmits information to be notified to a predetermined target person to a device (information processing device) corresponding to the predetermined target person. For example, the notification unit 103 is connected to a predetermined network such as the Internet via a wired or wireless connection, and transmits and receives information to and from an external information processing device. For example, the notification unit 103 transmits and receives information to and from other devices with communication functions, such as a remote control device or a terminal device, via a predetermined network such as the Internet.

[0127] The notification unit 103 transmits information to an external information processing device. For example, the notification unit 103 transmits various information to a remote control device, a terminal device, etc. The notification unit 103 notifies a predetermined target person by transmitting information estimated by the control unit 100 to the remote control device, the terminal device, etc. The notification unit 103 notifies a predetermined target person by transmitting information generated by the control unit 100 to the remote control device, the terminal device, etc.

[0128] Note that the above is merely an example, and the notification unit 103 may be in any form and may have any configuration as long as it is capable of providing the desired notification. For example, the notification unit 103 may have a display function when displaying information to a predetermined target person. In this case, the notification unit 103 may be a display device. The notification unit 103 may also be integrated with a display device having a function of displaying information, such as a remote control device or a terminal device. The notification unit 103 may also have an audio output function when outputting information as audio (audio output) to a predetermined target person. In this case, the notification unit 103 may be an audio output device. The notification unit 103 may also be integrated with a device having a function of audio outputting information, such as a remote control device or a terminal device.

[0129] The lighting 104 has a lighting device that illuminates a predetermined space. The lighting 104 has a lighting device that illuminates the bathroom 2. The lighting 104 has a lighting device that illuminates the changing room 3. The lighting 104 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100. The lighting 104 may dim the lighting device in response to an instruction from the control unit 100. The lighting 104 may turn on the lighting device in response to an instruction from the control unit 100. The lighting 104 may turn off the lighting device in response to an instruction from the control unit 100.

[0130] For example, the lighting 104 receives control instruction information from the control unit 100 and controls the lighting device based on the received control instruction information. The lighting 104 performs dimming control of the lighting device based on the control instruction information. For example, the lighting 104 turns the lighting device on or off based on the control instruction information.

[0131] Hot water temperature control unit 105a functions as a hot water temperature control means that controls the temperature of hot water (water) supplied to shower device 6. Hot water temperature control unit 105a is connected to control unit 100 so as to be able to send and receive signals (information) to and from control unit 100. Hot water temperature control unit 105a controls the temperature of hot water (water) supplied to shower device 6 in accordance with instructions from control unit 100. For example, hot water temperature control unit 105a has a valve (temperature adjustment valve) for adjusting the temperature of hot water (water) supplied to shower device 6. For example, the flow path (water supply path) controlled by hot water temperature control unit 105a is connected to the flow path (water supply path) controlled by hot water volume control unit 105b.

[0132] Hot water quantity control unit 105b functions as hot water quantity control means that controls the amount of hot water (cold water) supplied to shower device 6. Hot water quantity control unit 105b is connected to control unit 100 so as to be able to send and receive signals (information) to and from control unit 100. Hot water quantity control unit 105b controls the amount of hot water in accordance with instructions from control unit 100. For example, hot water quantity control unit 105b has a valve (flow rate adjustment valve) for adjusting the flow rate of hot water (cold water) supplied to shower device 6. For example, the flow path (water supply path) controlled by hot water quantity control unit 105b is connected to the flow path (water supply path) controlled by water discharge / stop control units 60a to 60c.

[0133] The bathtub water temperature control unit 106 functions as a water temperature control means that controls the temperature of the hot water (water) supplied to the bathtub 4. The bathtub water temperature control unit 106 is connected to the control unit 100 so that signals (information) can be sent and received between the control unit 100. The bathtub water temperature control unit 106 controls the temperature of the hot water (water) supplied to the bathtub 4 in accordance with instructions from the control unit 100. For example, the bathtub water temperature control unit 106 has a valve (temperature adjustment valve) for adjusting the temperature of the hot water (water) supplied to the bathtub 4.

[0134] The shoulder bath / waist bath control unit 107 functions as a water temperature control means for controlling the temperature of the hot water (water) supplied to the shoulder bath outlet and the waist bath outlet provided in the bathtub 4. The shoulder bath / waist bath control unit 107 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100. The shoulder bath / waist bath control unit 107 controls the temperature of the hot water (water) supplied to at least one of the shoulder bath outlet and the waist bath outlet in accordance with instructions from the control unit 100. For example, the shoulder bath / waist bath control unit 107 has a valve (temperature adjustment valve) for adjusting the temperature of the hot water (water) supplied to the shoulder bath outlet and the waist bath outlet.

[0135] The air conditioning 108 has an air conditioning device that adjusts the state of air in a specified space. The air conditioning 108 has an air conditioning device that adjusts the state of air in the bathroom 2. The air conditioning 108 has an air conditioning device that adjusts the state of air in the undressing room 3. For example, the air conditioning device has the function of adjusting at least one of temperature, humidity, and flow rate (airflow). The air conditioning 108 is connected to the control unit 100 so as to be able to send and receive signals (information) to and from the control unit 100. The air conditioning 108 may control the operation of the air conditioning device in accordance with instructions from the control unit 100.

[0136] For example, the air conditioner 108 receives control instruction information from the control unit 100 and controls the air conditioner based on the received control instruction information. The air conditioner 108 controls the operation of the air conditioner based on the control instruction information. For example, the air conditioner 108 starts or stops the air conditioner based on the control instruction information. The air conditioner 108 may have various functions as long as they are capable of adjusting the air condition in a specified space. For example, the air conditioner 108 may have a function (drying function) for drying laundry in the bathroom 2, i.e., a so-called bathroom drying function.

[0137] Ventilation fan 109 has a ventilation device that ventilates a predetermined space. Ventilation fan 109 has a ventilation device that ventilates bathroom 2. Ventilation fan 109 has a ventilation device that ventilates undressing room 3. Ventilation fan 109 is connected to control unit 100 so as to be able to send and receive signals (information) to and from control unit 100. Ventilation fan 109 may control the driving of the ventilation device in response to instructions from control unit 100.

[0138] For example, the ventilation fan 109 receives control instruction information from the control unit 100 and controls the ventilation device based on the received control instruction information. The ventilation fan 109 performs dimming control of the ventilation device based on the control instruction information. For example, the ventilation fan 109 drives or stops the ventilation device based on the control instruction information.

[0139] Note that the above is merely an example, and bathroom system 1 can employ any device configuration that can achieve the desired processing. In bathroom system 1, air conditioning 108 may have all the functions of regulating the air condition of a specified space, including ventilation. In this case, air conditioning 108 and ventilation fan 109 may be integrated. For example, if air conditioning 108 has a ventilation function, bathroom system 1 does not need to have ventilation fan 109.

[0140] Furthermore, for example, bathroom system 1 may have various sensors for collecting information about the space (wet space) including bathroom 2 and changing room 3. For example, sensor unit 10 of bathroom system 1 may have a door sensor that detects the opening and closing of the door to changing room 3 as an entry detection sensor for collecting information about users entering and leaving changing room 3. For example, bathroom system 1 functions as a bathroom management system that provides services related to bathroom management with the above configuration. Also, for example, bathroom system 1 functions as a bathroom monitoring system that provides services related to bathroom monitoring with the above configuration.

[0141] <1-3. Processing example using radio wave sensor> Next, we will outline an example of processing using a radio wave sensor. Radio wave sensor 10a, which is a radio wave radar as described above, emits radio waves into bathroom 2 and receives the reflected radio waves. In this way, radio wave sensor 10a receives the reflected radio waves, and bathroom system 1 can detect the coordinates of the point from which the radio waves are reflected, the intensity of the reflected radio waves, and the speed in the direction of travel of the radio waves at the point from which the radio waves are reflected (Doppler velocity). Therefore, bathroom system 1 can obtain, from the detection signal by radio wave sensor 10a, coordinate information of the point group from which the radio waves are reflected, information on the intensity of the reflected waves from each point, and information on the moving speed of each point.

[0142] For example, when a user is located (entered) in bathroom 2 (also referred to as the "user entry state"), radio waves reflected by an object (reflecting object) including the user are detected by radio wave sensor 10a, and point cloud information representing the object (reflecting object) including the user is detected.

[0143] 1 and 2, when user U is located in bathroom 2 (user entered state), radio wave sensor 10a detects radio waves reflected by objects such as the configuration related to panels 2a-2f in addition to user U. As a result, when user U is located in bathroom 2, bathroom system 1 acquires point cloud information representing objects such as the configuration related to panels 2a-2f in addition to user U.

[0144] On the other hand, for example, when a user is not present (entered) in bathroom 2 (also referred to as a "user-absent state"), radio waves reflected by objects (reflecting objects) that do not include the user are detected by radio wave sensor 10a, and point cloud information representing objects (reflecting objects) that do not include the user, i.e., objects other than the user, is detected. In this way, when a user is not present in bathroom 2 (user-absent state), point cloud information representing objects that are not necessary for estimating the user's position or movement is detected.

[0145] 1 and 2, when no user is present in bathroom 2 (user absent state), radio wave sensor 10a detects radio waves reflected by objects other than the user, such as the components related to panels 2a-2f. As a result, when no user is present in bathroom 2, bathroom system 1 can acquire point cloud information representing objects other than the user, such as the components related to panels 2a-2f.

[0146] Here, radio waves reflected from the components related to panels 2a-2f of bathroom 2 may affect the estimation of changes in the state of the space within bathroom 2, such as the estimation of the location and movement of a user within bathroom 2. Panels 2a-2f of bathroom 2 are made of panel-shaped materials such as polyvinyl chloride (PVC), resin, or hard plastic. Furthermore, for example, metal plates may be provided on the back surfaces of panels 2a-2f. When metal plates are provided on the back surfaces of panels 2a-2f, the metal plates form radio wave reflection areas, increasing the strength of radio waves reflected from the components related to panels 2a-2f of bathroom 2, which may affect the estimation of changes in the state of the space within bathroom 2.

[0147] Furthermore, even if no metal plate is provided on the backside or the like of panels 2a-2f, water droplets may adhere to the surfaces of panels 2a-2f due to the user's use or cleaning of shower device 6. In such cases, the areas on the surfaces of panels 2a-2f where water droplets adhere (water droplet adhesion areas) constitute radio wave reflection areas, and the strength of radio waves reflected from the configuration related to panels 2a-2f in bathroom 2 increases, which may affect the estimation of changes in the state of the space within bathroom 2.

[0148] In this way, when there are radio wave reflection areas where the strength of reflected radio waves can be strong, it can be difficult to properly estimate changes in the state of the space within bathroom 2. Therefore, bathroom system 1 excludes such radio wave reflection areas to estimate changes in the state of the space within bathroom 2. For example, bathroom system 1 excludes wall surfaces such as panels 2a-2f from the detection range because the reflection strength is high on those surfaces. Note that exclusion is not limited to excluding these areas from the data when bathroom system 1 performs estimation processing, and can take any form as long as the desired processing can be performed, such as excluding them from the output data output by radio wave sensor 10a.

[0149] For example, bathroom system 1 acquires detection information (also referred to as "first detection information") due to reflection from objects (reflecting objects) other than the user, such as radio wave reflection areas, when a user is not present. For example, bathroom system 1 performs detection when a user is not present, and acquires, as first detection information, point cloud information (also referred to as "first point cloud information") detected due to reflection from objects (reflecting objects) other than the user, such as radio wave reflection areas.

[0150] Then, bathroom system 1 acquires detection information (also referred to as "second detection information") due to reflection from objects (reflecting objects) including the user when the user has entered the room. For example, bathroom system 1 performs detection when the user has entered the room and acquires, as second detection information, point cloud information (also referred to as "second point cloud information") detected due to reflection from objects (reflecting objects) including the user.

[0151] Then, bathroom system 1 uses the first detection information and the second detection information to generate detection information (also referred to as "third detection information") in which the influence of the radio wave reflection area has been removed. For example, bathroom system 1 generates point cloud information (also referred to as "third point cloud information") in which the influence of the radio wave reflection area has been removed from the second point cloud information based on a comparison between the second point cloud information (for example, point cloud information such as that shown in FIG. 6) and the first point cloud information, as the third detection information. For example, bathroom system 1 generates the third point cloud information by deriving the difference between the second point cloud information and the first point cloud information.

[0152] Then, bathroom system 1 uses the third detection information to estimate state changes in the space within bathroom 2. For example, bathroom system 1 uses the third point cloud information to estimate state changes in the space within bathroom 2. Bathroom system 1 may further remove information that could be noise (such as dynamic noise) from the third detection information. For example, bathroom system 1 may generate detection information (also referred to as "fourth detection information") from which noise has been further removed from the third detection information. In this case, bathroom system 1 uses the fourth detection information to estimate state changes in the space within bathroom 2. Dynamic noise may include, for example, radio waves reflected from an object that is not stationary due to vibrations or the like (such as a washing machine).

[0153] For example, bathroom system 1 may further perform processing to remove dynamic noise and the like using the third point cloud information. As a result, bathroom system 1 generates point cloud information (also referred to as "fourth point cloud information") from which various influences (noises) other than the influence of the radio wave reflection area have been removed as fourth detection information. In this case, bathroom system 1 uses the fourth point cloud information (for example, point cloud information as shown in FIG. 9) to estimate state changes in the space within bathroom 2.

[0154] <1-4. Processing example> Based on the above, an example of the processing performed by bathroom system 1 will now be described with reference to Fig. 5. Fig. 5 is a flowchart showing an example of the procedure of processing performed by the bathroom system. For example, Fig. 5 is a flowchart showing an example of a state estimation processing performed by bathroom system 1 according to the embodiment. Note that although the processing will be described with bathroom system 1 as the processing subject, each processing may be performed by any device, such as sensor unit 10 (radio wave sensor 10a, etc.), control unit 100, etc., depending on the device configuration included in bathroom system 1.

[0155] Bathroom system 1 emits radar and derives the distance to each reflection point, azimuth angle, elevation angle, radio wave intensity, and Doppler velocity from the received signal (step S101). For example, bathroom system 1 emits radar from radio wave sensor 10a, and control unit 100 derives the distance to each reflection point, azimuth angle, elevation angle, radio wave intensity, and Doppler velocity based on the received signal received by radio wave sensor 10a, thereby acquiring second detection information.

[0156] For example, bathroom system 1 derives the distance to each reflection point, azimuth angle, elevation angle, radio wave intensity, and Doppler velocity based on detection when a user enters bathroom 2, and acquires point cloud information (second point cloud information) from objects (reflecting objects) including the user as second detection information. For example, bathroom system 1 acquires point cloud information (second point cloud information) including the user, as shown in FIG. 6. FIG. 6 is a diagram showing an example of a point cloud detected by a radio wave sensor of the bathroom system. FIG. 6 shows an example of a point cloud (point cloud data) when a user is located in bathroom 2.

[0157] When there is no moving object, bathroom system 1 excludes wall surfaces and corners with high reflection intensity from the detection range (step S102). For example, bathroom system 1 excludes wall surfaces and corners with high reflection intensity from the detection range based on detection when no user is present in bathroom 2.

[0158] For example, bathroom system 1 acquires first detection information obtained by detection in a user-absent state, where a user is not located in bathroom 2. For example, bathroom system 1 acquires first point cloud information as the first detection information from data storage unit 101. For example, bathroom system 1 may perform detection in a user-absent state before the processing of step S101, derive the distance to each reflection point, azimuth angle, elevation angle, radio wave intensity, and Doppler velocity based on the detection in the user-absent state, and acquire point cloud information (first point cloud information) from objects (reflecting objects) that do not include a user.

[0159] For example, bathroom system 1 uses the second detection information and the first detection information to generate third detection information by removing the influence (noise) of reflections from walls and corners with high reflection intensity from the second detection information. For example, bathroom system 1 uses the second point cloud information and the first point cloud information to generate point cloud information (third point cloud information) by removing from the second point cloud information point clouds based on reflections from walls and corners with high reflection intensity. In this way, bathroom system 1 excludes radio wave reflection areas such as walls and corners with high reflection intensity from areas other than the user from its detection range.

[0160] Bathroom system 1 then executes the processes of steps S103 and S104. Note that steps S103 and S104 are step numbers used for convenience in explaining the processes, and may be executed in any order. For example, step S104 may be executed before step S103.

[0161] Bathroom system 1 removes low-intensity noise from reflection points based on the radio wave intensity (step S103). For example, bathroom system 1 automatically adjusts a threshold using a CFAR (Constant False Alarm Rate) detection process, and removes information from reflection points with an intensity below that threshold as noise.

[0162] An overview of the processing in step S103 will now be described with reference to FIG. 7. FIG. 7 is a diagram showing an example of the intensity distribution of radio waves received by the radio wave sensor of the bathroom system. FIG. 7 is a graph showing a schematic diagram in which the horizontal axis represents the intensity of the radio waves reflected from each point, and the vertical axis represents the frequency (number of points) of the points indicating that intensity. For example, if no metal plate is placed on the backside of panels 2a-2f or if there are no water droplet-adhered areas on the surfaces of panels 2a-2f, the intensity of the waves emitted from radio wave sensor 10a and reflected by panels 2a-2f will be low. In such cases, the influence (noise) of reflections from panels 2a-2f may be included in the third point cloud information.

[0163] Furthermore, because many of the radio waves emitted from radio wave sensor 10a are reflected by panels 2a-2f, etc., the frequency (number of points) of such radio waves increases. As a result, the graph in FIG. 7 shows one peak in the region of low reflected wave intensity. On the other hand, the reflected waves reflected by a user entering bathroom 2 have relatively high intensity, so the graph in FIG. 7 shows another peak due to the reflected waves reflected by the user in the region of high reflected wave intensity. Of the received reflected waves, radio waves below a predetermined intensity threshold (corresponding to the threshold in FIG. 7) are determined to be noise and are deleted from the data (point cloud information, etc.) used for processing. As a result, bathroom system 1 can appropriately remove reflected waves with low intensity and noise that were not removed in the processing of step S102.

[0164] Furthermore, the predetermined intensity threshold (corresponding to the threshold in FIG. 7) for determining that a received radio wave is noise can be changed based on the detected reflected wave. In bathroom system 1, the predetermined intensity threshold is determined using the CFAR method. Generally, the lower the predetermined intensity threshold is set, the higher the detection probability of the target to be detected, but the higher the probability of a false alarm (detection). On the other hand, setting the predetermined intensity threshold higher reduces the false alarm probability, but decreases the target detection probability. Thus, the target detection probability and the false alarm probability change depending on the setting of the predetermined intensity threshold, resulting in a trade-off. The CFAR method is generally known as a method for setting a predetermined intensity threshold based on the intensity distribution of the received reflected wave so that the false alarm probability remains constant.

[0165] Bathroom system 1 also removes static noise from the reflection points (step S104). For example, bathroom system 1 removes noise with a small Doppler velocity from the reflection points.

[0166] An overview of this processing will be explained using Figure 8. Figure 8 is a diagram showing an example of the distribution of Doppler velocities of radio waves received by the radio wave sensors of the bathroom system. Figure 8 is a graph showing a schematic diagram in which the horizontal axis represents the Doppler velocity of each point that reflected the radio waves, and the vertical axis represents the frequency (number of points) of the points that indicate that velocity. Here, the Doppler velocity calculated from the waves irradiated from radio wave sensor 10a and reflected by stationary objects such as panels 2a-2f is almost zero.

[0167] Furthermore, because many of the radio waves emitted from radio wave sensor 10a are reflected by panels 2a-2f, etc., the frequency (number of points) of such radio waves increases. As a result, the graph in FIG. 8 shows a single peak near the Doppler velocity of zero. Meanwhile, because a user who has entered bathroom 2 moves, the reflected waves reflected by the user are distributed from the area where the Doppler velocity is negative (approaching radio wave sensor 10a) to the area where the Doppler velocity is positive (moving away from radio wave sensor 10a). Of the received reflected waves, radio waves whose absolute value of the Doppler velocity is below a predetermined velocity threshold (for example, corresponding to the range between the dashed dotted lines in FIG. 8) are determined to be noise and are deleted from the data (point cloud information, etc.) used for processing.

[0168] Bathroom system 1 obtains point cloud information representing users in bathroom 2 by multiplying the information on the strength of the radio waves reflected from each point obtained in steps S103 and S104 with the information on the speed of each point (step S105). For example, bathroom system 1 generates point cloud information (fourth point cloud information) representing users from which various influences other than those in the radio wave reflection area have been removed by removing data determined to be noise based on the information on the strength of the radio waves reflected from each point and the information on the speed of each point.

[0169] This allows bathroom system 1 to detect users more accurately. Figure 9 shows an example of a user detected as a point cloud in this way. Figure 9 is a diagram showing an example of a point cloud detected by the radio wave sensor of the bathroom system.

[0170] Bathroom system 1 estimates the position of the person from the data from which noise has been removed (step S106). For example, as shown in FIG. 9, bathroom system 1 estimates the position of the user from point cloud information (fourth point cloud information) corresponding to the user from which various influences other than those in the radio wave reflection area have been removed. For example, bathroom system 1 estimates the position of the user based on the relationship between the space and coordinates of bathroom 2. Bathroom system 1 obtains information about the user's position within bathroom 2 by calculating the center of gravity of the point cloud that reflects the radio waves.

[0171] Note that the processing flow shown in Figure 5 is merely an example, and the processing flow executed by bathroom system 1 is not limited to the processing flow shown in Figure 5, and may be any processing flow as long as the desired processing can be executed. For example, bathroom system 1 may not execute at least one of steps S103 and S104. For example, bathroom system 1 may not execute step S104.

[0172] Bathroom system 1 may also estimate various information using fourth detection information, such as point cloud information (fourth point cloud information) indicating the user. Bathroom system 1 may also estimate the user's height, posture, etc. based on the height of the highest point in the point cloud. Bathroom system 1 may also acquire information such as the user's height, posture, etc. based on the height of the highest point in the point cloud.

[0173] Bathroom system 1 may also estimate bodily movement or moving posture from the water discharge area of ​​shower device 6 provided in bathroom 2 to bathtub 4 also provided in bathroom 2. For example, bathroom system 1 may estimate information related to the user's movement based on changes in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user. For example, bathroom system 1 may estimate at least one of the user's bodily movement or moving posture based on changes over time in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user.

[0174] For example, bathroom system 1 may estimate the user's physical movement from the water spouting area of ​​shower device 6 to bathtub 4 based on a time series change from the fourth point cloud information at a first time when the user is located in the water spouting area of ​​shower device 6 to the fourth point cloud information at a second time when the user is located in bathtub 4. For example, bathroom system 1 may estimate the user's movement posture from the water spouting area of ​​shower device 6 to bathtub 4 based on a time series change from the fourth point cloud information at a first time when the user is located in the water spouting area of ​​shower device 6 to the fourth point cloud information at a second time when the user is located in bathtub 4. Note that the above is merely an example, and bathroom system 1 may use various information to estimate the user's physical movement or movement posture from the water spouting area of ​​shower device 6 installed in bathroom 2 to bathtub 4 installed in bathroom 2.

[0175] Bathroom system 1 may also estimate the user's movements within the water discharge area of ​​shower device 6 installed in bathroom 2. For example, bathroom system 1 may estimate information related to the user's movements based on changes in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user. For example, bathroom system 1 may estimate the user's movements based on changes over time in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user.

[0176] For example, bathroom system 1 may estimate the user's movements within the water-discharge area of ​​shower device 6 based on a time series change from the fourth point cloud information at a first time when the user is located within the water-discharge area of ​​shower device 6 to the fourth point cloud information at a second time when the user is located within the water-discharge area of ​​shower device 6. Note that the above is merely one example, and bathroom system 1 may use various information to estimate the user's movements within the water-discharge area of ​​shower device 6 installed in bathroom 2. For example, if multiple radio wave sensors 10a are installed, bathroom system 1 may estimate the user's movements within the water-discharge area of ​​shower device 6 using information obtained by detection by radio wave sensors 10a located near the water-discharge area of ​​shower device 6.

[0177] Bathroom system 1 may also estimate the respiratory state of a user positioned in bathtub 4 installed in bathroom 2. For example, bathroom system 1 may estimate information related to the user's breathing based on changes in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user. For example, bathroom system 1 may estimate the user's respiratory state based on changes over time in fourth detection information, such as point cloud information (fourth point cloud information) indicating the user.

[0178] For example, bathroom system 1 may estimate the respiratory state of a user in bathtub 4 based on a time series change from the fourth point cloud information at a first time when the user is in bathtub 4 to the fourth point cloud information at a second time when the user is in bathtub 4. Note that the above is merely one example, and bathroom system 1 may use various information to estimate the respiratory state of a user in bathtub 4 installed in bathroom 2. For example, if multiple radio wave sensors 10a are provided, bathroom system 1 may estimate the respiratory state of a user in bathtub 4 using information obtained by detection by radio wave sensors 10a (e.g., radio wave sensors 10a2 and 10a3 in FIG. 12 ) arranged near end 43 that functions as a pillow section.

[0179] <1-5. Radio wave sensor antenna placement example> Here, an example of the arrangement of the antenna of the radio wave sensor will be described. For example, the arrangements shown in Fig. 10 and Fig. 11 may be used. Fig. 10 and Fig. 11 are diagrams showing an example of the arrangement of the antenna of the radio wave sensor. Specifically, Fig. 10 is a diagram showing an example of the orientation of the antenna of the radio wave sensor when the bathroom is viewed from above. Also, Fig. 11 is a diagram showing an example of the orientation of the antenna of the radio wave sensor when the bathroom is viewed from the side. Note that explanations of points similar to those described above will be omitted as appropriate.

[0180] 10 and 11 show a schematic configuration of the radio wave sensor 10a. Note that in order to explain the orientation of the antenna 12 of the radio wave sensor, only the housing 11 and the antenna 12 are shown in Fig. 10 and 11, but the radio wave sensor 10a has various components other than the housing 11 and the antenna 12 to function as a radio wave radar.

[0181] 10 and 11, radio wave sensor 10a is disposed so that antenna surface 121 of antenna 12 disposed within housing 11 intersects with the surface of panel 2a on which radio wave sensor 10a is mounted. In this manner, the plane direction of antenna surface 121 of antenna 12 of radio wave sensor 10a intersects with the surface of the panel on which radio wave sensor 10a is mounted. Radio wave sensor 10a is disposed so that antenna surface 121 of antenna 12 disposed within housing 11 faces the center of bathroom 2. In this manner, antenna surface 121 of antenna 12 of radio wave sensor 10a is oriented to face the center of bathroom 2.

[0182] Area AR11 shown in Figures 10 and 11 shows an example of the range in which radio wave sensor 10a receives reflected waves. Radio wave sensor 10a transmits radio waves at a predetermined angle and receives reflections from panels 2a-2f of bathroom 2. As shown in Figures 10 and 11, depending on the placement position of radio wave sensor 10a, antenna surface 121 of antenna 12 can be positioned so that it faces the center of bathroom 2, eliminating the need to place radio wave sensor 10a in the center of bathroom 2 and improving the flexibility of placement of radio wave sensor 10a.

[0183] <1-6. Other examples of bathroom system configurations> The above-described configuration and processing are merely examples of the configuration and processing of the bathroom system, and the bathroom system may have various configurations and perform various processes. Some examples will be described below.

[0184] 3, i.e., the arrangement of the sensor devices of the sensor unit 10, is an example, and the bathroom system may arrange the sensor devices of the sensor unit 10 in any location. The sensor unit 10 may have multiple radio wave sensors 10a.

[0185] For example, the sensor unit 10 may have multiple radio wave sensors 10a, including a first radio wave sensor 10a whose detection range is a first space including a bathtub 4 installed in the bathroom 2, and a second radio wave sensor 10a that detects a second space including a water discharge area of ​​a shower device 6 installed in the bathroom 2. In this case, the output data of the sensor unit 10 includes first output data from the first radio wave sensor 10a and second output data from the second radio wave sensor 10a.

[0186] The bathroom system may also have three or more radio wave sensors 10a. An example of this case will be described using FIG. 12. FIG. 12 is a diagram showing another example configuration of a bathroom system. Bathroom system 1A in FIG. 12 has radio wave sensor 10a1, radio wave sensor 10a2, and radio wave sensor 10a3. Note that when describing radio wave sensor 10a1, radio wave sensor 10a2, and radio wave sensor 10a3 without making any particular distinction, radio wave sensor 10a will be referred to. In this way, bathroom system 1A has three radio wave sensors 10a, each located in a different position.

[0187] Radio wave sensors 10a1, 10a2, and 10a3 are each installed at a position higher than the upper end of bathtub 4 installed in bathroom 2. In FIG. 12, radio wave sensor 10a1 is positioned similarly to radio wave sensor 10a in FIG. 3. Radio wave sensor 10a2 is positioned along panel 2b near end 43, which functions as the pillow section of bathtub 4. Radio wave sensor 10a2 is positioned along panel 2c near the pillow section and end 43, which functions as the pillow section of bathtub 4. In this way, by placing radio wave sensor 10a near end 43, which functions as the pillow section of bathtub 4, the accuracy of detecting the breathing of a user bathing in bathtub 4 can be improved.

[0188] Further advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

[0189] The above-described embodiments and modifications may have the following configurations, but are not limited to these. (1) a radio wave sensor that is installed in a bathroom formed by a plurality of panels and detects changes in the state of the bathroom; and a state estimation means for estimating a state change in the bathroom based on output data from the radio wave sensor, The state estimation means estimates a state change in the space within the bathroom, excluding a radio wave reflection area including the surface of the panel. A bathroom system characterized by: (2) A metal plate that forms the radio wave reflection area is disposed on the rear surface side of the plurality of panels. A bathroom system as described in (1). (3) The state estimation means estimates a state change in the space within the bathroom by excluding a water droplet-adhered area on the surface of the panel as the radio wave reflection area. A bathroom system according to (1) or (2). (4) The state estimation means estimates a state change in the space within the bathroom, excluding four corner areas of the bathroom. The bathroom system according to any one of (1) to (3) above. (5) The state estimation means estimates a state change in the bathroom based on data excluding reception data obtained by reflection from the radio wave reflection area. The bathroom system according to any one of (1) to (4) above. (6) The state estimation means estimates a state change in the bathroom based on data from which noise data based on vibration components input to the radio wave sensor has been removed. The bathroom system according to any one of (1) to (5) above. (7) The state estimation means estimates a state change in the bathroom based on data from which noise data based on objects present in the bathroom has been removed. The bathroom system according to any one of (1) to (6) above. (8) The radio wave sensor is installed at a position higher than the upper end of a bathtub installed in the bathroom. The bathroom system according to any one of (1) to (7) above. (9) The detection range of the radio wave sensor includes a pillow portion provided in a bathtub installed in the bathroom. The bathroom system according to any one of (1) to (8) above. (10) The radio wave sensor is provided on a panel other than a panel on which an entrance to the bathroom is provided, among the plurality of panels forming the bathroom. The bathroom system according to any one of (1) to (9) above. (11) The plane direction of the antenna surface of the radio wave sensor intersects with the surface of the panel on which the radio wave sensor is installed. The bathroom system according to any one of (1) to (10) above. (12) The antenna surface of the radio wave sensor is disposed facing the center of the bathroom. The bathroom system according to any one of (1) to (11) above. (13) The state estimation means executes a first mode for estimating the movement or position of a user in the bathroom and a second mode for estimating the breathing of a user positioned in a bathtub installed in the bathroom. The bathroom system according to any one of (1) to (12) above. (14) a mode switching means for switching between the first mode and the second mode based on an operation of an operation unit installed in the bathroom; The bathroom system according to (13) is characterized by having: (15) a mode switching means for switching between the first mode and the second mode based on the user's position in the bathroom; The bathroom system according to (13) is characterized by having: (16) The detection range of the radio wave sensor includes a first space including a bathtub installed in the bathroom and a second space including a water discharge area of ​​a shower device installed in the bathroom. The bathroom system according to any one of (1) to (15) above. (17) The radio wave sensor includes a first radio wave sensor having a detection range that covers a first space including a bathtub installed in the bathroom, and a second radio wave sensor that detects a second space that covers a water discharge area of ​​a shower device installed in the bathroom, and the output data includes first output data from the first radio wave sensor and second output data from the second radio wave sensor. The bathroom system according to any one of (1) to (16) above. (18) a determination means for determining whether or not an object other than the user is present within the detection range of the radio wave sensor based on the output data of the radio wave sensor; The bathroom system according to any one of (1) to (17) above, characterized by comprising: (19) The state estimation means estimates that the state change in the bathroom is an abnormal state based on the determination result of the determination means. A bathroom system as described in (18). (20) The state estimation means estimates a body movement or a moving posture from a water discharge area of ​​a shower device provided in the bathroom to a bathtub provided in the bathroom. The bathroom system according to any one of (1) to (19) above. (twenty one) The state estimation means estimates the user's movement within a water discharge area of ​​a shower device installed in the bathroom. The bathroom system according to any one of (1) to (20) above. (twenty two) The state estimation means estimates the respiratory state of a user positioned in a bathtub installed in the bathroom. The bathroom system according to any one of (1) to (21) above. [Explanation of symbols]

[0190] 1. Bathroom System 2 Bathroom 2a~2d Side panels 2e Floor panel 2nd floor ceiling panel 3. Dressing room (adjacent room) 4. Bathtub 5. Bathroom counter 6. Shower equipment 6a Overhead shower (OH) 6b Hand shower (HS) 6c Spout (Flange) 7 mirror 8. Shower Bar 8a Bar member (bar-shaped member) 8b Head holding part 9. Mike 10 Sensor section 10a Radio wave sensor 11. Housing 12 Antenna 100 control unit (control device) 101 Data storage unit 102 Input section 103 Information Department 104 Lighting 105a Water temperature control unit 105b Hot water volume control unit 106 Bathtub water temperature control unit 107 Shoulder bath / waist bath control unit 108 Air conditioning 109 Ventilation fan 110 State estimation unit 111 Judgment section

Claims

1. a radio wave sensor that is installed in a bathroom formed by a plurality of panels and detects changes in the state of the bathroom; and a state estimation means for estimating a state change in the bathroom based on output data from the radio wave sensor, The state estimation means estimates a state change in the space within the bathroom, excluding a radio wave reflection area including the surface of the panel. A bathroom system characterized by:

2. A metal plate that forms the radio wave reflection area is disposed on the rear surface side of the plurality of panels.

2. The bathroom system according to claim 1.

3. The state estimation means estimates a state change in the space within the bathroom by excluding a water droplet-adhered area on the surface of the panel as the radio wave reflection area.

2. The bathroom system according to claim 1.

4. The state estimation means estimates a state change in the space within the bathroom, excluding four corner areas of the bathroom.

2. The bathroom system according to claim 1.

5. The state estimation means estimates a state change in the bathroom based on data excluding reception data obtained by reflection from the radio wave reflection area.

2. The bathroom system according to claim 1.

6. The state estimation means estimates a state change in the bathroom based on data from which noise data based on vibration components input to the radio wave sensor has been removed.

2. The bathroom system according to claim 1.

7. The state estimation means estimates a state change in the bathroom based on data from which noise data based on objects present in the bathroom has been removed.

2. The bathroom system according to claim 1.

8. The radio wave sensor is installed at a position higher than the upper end of a bathtub installed in the bathroom.

2. The bathroom system according to claim 1.

9. The detection range of the radio wave sensor includes a pillow portion provided in a bathtub installed in the bathroom.

2. The bathroom system according to claim 1.

10. The radio wave sensor is provided on a panel other than a panel on which an entrance to the bathroom is provided, among the plurality of panels forming the bathroom.

2. The bathroom system according to claim 1.

11. The plane direction of the antenna surface of the radio wave sensor intersects with the surface of the panel on which the radio wave sensor is installed.

2. The bathroom system according to claim 1.

12. The antenna surface of the radio wave sensor is disposed facing the center of the bathroom.

2. The bathroom system according to claim 1.

13. The state estimation means executes a first mode for estimating the movement or position of a user in the bathroom and a second mode for estimating the breathing of a user positioned in a bathtub installed in the bathroom.

2. The bathroom system according to claim 1.

14. a mode switching means for switching between the first mode and the second mode based on an operation of an operation unit installed in the bathroom; The bathroom system according to claim 13, characterized in that it comprises:

15. a mode switching means for switching between the first mode and the second mode based on the user's position in the bathroom; The bathroom system according to claim 13, characterized in that it comprises:

16. The detection range of the radio wave sensor includes a first space including a bathtub installed in the bathroom and a second space including a water discharge area of ​​a shower device installed in the bathroom.

2. The bathroom system according to claim 1.

17. The radio wave sensor includes a first radio wave sensor having a detection range that covers a first space including a bathtub installed in the bathroom, and a second radio wave sensor that detects a second space that covers a water discharge area of ​​a shower device installed in the bathroom, and the output data includes first output data from the first radio wave sensor and second output data from the second radio wave sensor.

2. The bathroom system according to claim 1.

18. a determination means for determining whether or not an object other than the user is present within the detection range of the radio wave sensor based on the output data of the radio wave sensor; The bathroom system according to claim 1, further comprising:

19. The state estimation means estimates that the state change in the bathroom is an abnormal state based on the determination result of the determination means.

19. A bathroom system according to claim 18.

20. The state estimation means estimates a body movement or a moving posture from a water discharge area of ​​a shower device provided in the bathroom to a bathtub provided in the bathroom.

2. The bathroom system according to claim 1.

21. The state estimation means estimates the user's movement within a water discharge area of ​​a shower device installed in the bathroom.

2. The bathroom system according to claim 1.

22. The state estimation means estimates the respiratory state of a user positioned in a bathtub installed in the bathroom.

2. The bathroom system according to claim 1.

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