JP2020052985A - Water sway detection device, bathing system and water sway detection method - Google Patents

Abstract

A water fluctuation detection device, a bathroom system, and a water fluctuation detection method that facilitate detection of abnormalities occurring in bathrooms, water storage facilities, and the like are provided. SOLUTION: A hollow cylindrical frame 10 capable of receiving water injection from the outside, a pressure receiving plate 20 arranged to freely swing inside the hollow cylindrical frame 10, and a board sliding following the swinging of the pressure receiving plate 20. 30, and a light-emitting element 41 and a light-receiving element 42 facing each other so as to sandwich the board 30. It is characterized in that it slides as the pressure receiving plate 20 oscillates due to movement, and changes the amount of light from the light emitting element 41 detected by the light receiving element 42 . [Selection drawing] Fig. 1

Description

  The present invention relates to a water swing detection device, a bathing system, and a water swing detection method.

  It is known that fatal accidents such as the elderly and handicapped in bathrooms occur more frequently in Japan because of the unique Japanese bathing method of soaking hot water in their shoulders than in Western countries. In addition, in a water storage facility such as a pool or a water storage tank, an unexpected death accident or the like can occur.

  Patent Document 1 discloses an antenna unit that can irradiate a linearly polarized radio wave into a bathroom, a sensor unit that can detect the movement of an object in a radio wave irradiation area, and a signal processing unit that processes input / output signals. It describes that the behavior of a bather is sensored using a bathroom behavior detecting device having a part.

JP 2004-348551 A

  As a means to prevent fatal accidents in bathrooms, water storage facilities, and the like, monitoring these with camera images can be considered, but there is a possibility that accidents cannot be prevented by overlooking changes in images.

  In Patent Document 1, although detection noise is suppressed, it is difficult to completely remove the noise, and there is a limit in detection accuracy.

  The present invention has been made in view of the above problems, and provides a water swing detection device, a bathroom system, and a water swing detection method that detect a movement of water to make it easy to detect an abnormality that occurs in a bathroom, a water storage facility, or the like. With the goal.

  In view of the above problems, a water swing detection device according to the present invention includes a hollow cylindrical frame capable of receiving water injection from the outside, a pressure receiving plate that is swingably disposed inside the hollow cylindrical frame, and a pressure receiving plate. A water swing detection device comprising: a board that slides following the swing of the board; and a light emitting element and a light receiving element that are arranged to face each other so as to sandwich the board, wherein the board is the hollow cylinder The light receiving element slides in accordance with the swing of the pressure receiving plate due to the movement of water existing in the frame, and changes the amount of light from the light emitting element detected by the light receiving element.

  In one aspect of the water swing detection device according to the present invention, the board may be provided with one or more slits.

  In one aspect of the water swing detection device according to the present invention, the board is provided with a plurality of slits, and an optical path width of the light emitting element is between the slit width and the slit. The width may be narrower than the width of the light shielding portion.

  In one aspect of the water swing detection device according to the present invention, the light-emitting element and the light-receiving element that are arranged to face each other are arranged side by side at least at two positions in the sliding direction of the board. It may be.

  In one aspect of the water swing detection device according to the present invention, in a state where water does not enter the hollow cylindrical frame, one of the light receiving elements emits light from the opposing light emitting element. May be arranged so as not to receive light, and another one of the light receiving elements may be arranged to receive light from the opposing light emitting element.

  In one aspect of the water swing detection device according to the present invention, light emission from the light emitting element travels in a band-shaped optical path to the light receiving element, and in a state where water does not enter the hollow cylindrical frame, The light-emitting element and the light-receiving element may be arranged so that the strip-shaped optical path straddles the slit and the light-shielding portion where the slit does not exist.

  In one aspect of the water swing detection device according to the present invention, the end of the hollow cylindrical frame is formed so that the opening area gradually increases as the distance from the pressure receiving plate increases. Good.

  Further, in view of the above problems, a bathing system according to the present invention has a bathtub for bathing, a water swing detection device provided in the bathtub to detect a swing of water in the bathtub, and a bathing bath in the bathtub. Notification means for notifying a caregiver or the bather when the water fluctuation by the water fluctuation detection device is not detected for a predetermined period of time after the person takes a bath. The detection device is a hollow cylindrical frame capable of receiving water injection from the outside, a pressure receiving plate that is swingably disposed inside the hollow cylindrical frame, and a board that slides following the swing of the pressure receiving plate, A light-emitting element and a light-receiving element disposed so as to sandwich the board, and the board slides with the swinging of the pressure receiving plate due to the movement of water existing in the hollow cylindrical frame, The light emitting element detected by a light receiving element Changing the amount of light from, characterized in that.

  In addition, in view of the above problems, the water swing detection method according to the present invention includes a hollow cylindrical frame capable of receiving water injection from the outside, a pressure receiving plate that is swingably disposed inside the hollow cylindrical frame, and A board that slides following the swing of the pressure receiving plate, and a light emitting element and a light receiving element that are arranged to face each other so as to sandwich the board, and a water detection method using a water swing detecting apparatus including: The board slides with the swinging of the pressure receiving plate due to the movement of water present in the hollow cylindrical frame, and changes the amount of light from the light emitting element detected by the light receiving element. .

  Advantageous Effects of Invention According to the present invention, it is possible to provide a water swing detection device, a bathroom system, and a water swing detection method that can easily detect an abnormality occurring in a bathroom, a water storage facility, or the like by detecting movement of water.

  FIG. 2 is an exploded perspective view of the water swing detection device according to the first embodiment.   It is a front sectional view of the water swing detecting device concerning a 1st embodiment.   It is a side sectional view of the water swing detecting device concerning a 1st embodiment.   It is a front sectional view in the state where water moved.   FIG. 5 is a front sectional view showing a state where water has moved in a direction opposite to that of FIG. 4.   It is a front sectional view of the water swing detection device of the modification 1 of a 1st embodiment.   FIG. 10 is a front sectional view of a water swing detection device according to a modification 2 of the first embodiment.   It is a schematic structure figure of the bathing system concerning a 2nd embodiment.   It is a figure showing the flow chart as an example of the processing in the bathing system concerning a 2nd embodiment.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described.

  As shown in FIGS. 1 to 3, the water swing detection device 100 includes a hollow cylindrical frame 10 formed of a hollow cylindrical member, and a pressure receiving plate 20 that swings by receiving water pressure accompanying water movement. , A board 30 that slides following the swing of the pressure receiving plate 20, and a photo interrupter 40 that includes a light emitting element 41 and a light receiving element 42, and is entirely covered by a cover 50. It should be noted that the term “movement of water” in the present specification means not only a water flow but also a movement of water due to a pressure change.

  The hollow cylindrical frame 10 is a resin molded product, and in this embodiment, both axial end surfaces are open. Thereby, when the water swing detection device 100 is installed in a bathtub, a pool, or the like, water flows into the hollow cylindrical frame 10 from the openings at both axial end surfaces, and water is constantly in the hollow cylindrical frame 10. It will be there. When there is movement in the water, the water moves in the axial direction of the hollow cylindrical frame 10, and the axial direction of the hollow cylindrical frame 10 matches the water movement direction. At the center of the upper surface of the hollow cylindrical frame 10, an insertion slit 11 serving as an insertion port of the pressure receiving plate 20 is formed so as to be orthogonal to the axial direction.

  The cross-sectional shape (shape in side view) of the hollow cylindrical frame 10 is not particularly limited as long as water can flow therein. For example, in addition to the squares shown in FIG. 3 and the like, rectangles, circles, ellipses, polygons such as triangles and pentagons, and star shapes may be used. In view of manufacturability, ease of installation, and the like, a quadrangle is preferable.

  The pressure receiving plate 20 is also a resin molded product, and is made of a flat thin plate. The shape of the pressure receiving plate 20 is not particularly limited, but is preferably similar to the cross-sectional shape of the hollow cylindrical frame 10. This is because it can be smoothly swung in the hollow cylindrical frame 10. The size (flat area) of the pressure receiving plate 20 is preferably as close as possible to the cross-sectional area of the internal space (water passage) of the hollow cylindrical frame 10. If the plane area of the pressure receiving plate 20 substantially matches the cross-sectional area of the water passage, the pressure receiving plate 20 completely blocks the water passage. Thereby, the pressure receiving plate 20 efficiently receives the water pressure accompanying the movement of the water, and the detection accuracy is improved.

  A support 21 is provided at the center of the upper edge of the pressure receiving plate 20, and a fulcrum body 22 is provided in the middle of the support 21. The fulcrum body 22 is cylindrical, and its axial direction coincides with the swing direction of the pressure receiving plate 20. The thickness of the pressure receiving plate 20 and the support column 21 is smaller than the opening width (width in the axial direction) of the insertion slit 11 provided in the hollow cylindrical frame 10. On the other hand, the diameter of the fulcrum body 22 is larger than the opening width (axial direction width) of the insertion slit 11. Therefore, when the pressure receiving plate 20 is inserted from the insertion slit 11 into the hollow cylindrical frame 10, the fulcrum body 22 cannot pass through the insertion slit 11 and is received by the top surface of the hollow cylindrical frame 10, so that the pivoting support point of the pressure receiving plate 20 is Becomes Thereby, the pressure receiving plate 20 is swingably disposed with respect to the hollow cylindrical frame 10. In other words, according to the principle of leverage, the fulcrum body 22 is a fulcrum, the force point at which the passive plate 20 swings due to water pressure, and the tip of the column 21 are the action points.

  The boat 30 is also a resin molded product. In the present embodiment, the boat 30 is a flat thin plate member having a predetermined length, and a plurality of slits 30a are formed in the board 30 entirely in the longitudinal direction. . The slits 30a are all the same in size and are arranged at equal intervals. The board part existing between the slits 30a functions as a light shielding part 30b.

  A recess 30c is formed in the center of the lower edge of the board 30. Then, the board 30 is arranged in parallel with the axial direction of the hollow cylindrical frame 10 in a state where the tip of the column 21 is received in the concave portion 30c. In other words, the board 30 is arranged parallel to the direction of water movement. In other words, the board 30 is disposed in parallel with the swinging direction of the pressure receiving plate 20. As a result, the slits 30a are arranged in parallel to the swing direction of the pressure receiving plate 20. Then, the slit board 30 slides in the swing direction following the swing of the pressure receiving plate 20.

  As shown in each drawing, the leading edge of the support 21 and the back edge (bottom edge) of the recess 30c may be flat, but the leading edge of the support 21 and the back edge (bottom edge) of the recess 30c may be flat. It is preferable that at least one, and preferably both, have an arc shape. This allows the board 30 to slide more smoothly following the swing of the pressure receiving plate 20.

  When the light from the light-emitting element 41 is received by the light-receiving element 42, a large amount of current flows and the voltage drops, while the light path is blocked by some object, and the light from the light-emitting element 41 A circuit is provided in which no current flows and the voltage rises when no light is received. In the present embodiment, the movement of water is detected based on this voltage change.

  As the photo interrupter 40, a commercially available product in which the current circuit, the light emitting element 41, and the light receiving element 42 are incorporated in advance can be used. Specifically, a light emitting element 41 and a light receiving element 42 are arranged opposite to each other on a circuit board 43 provided with a current circuit, and the light emitting element 41 and the light receiving element 42 are covered by a cover 44 so as to exist independently. ing. Optical path slits 44 a for irradiating the light from the light emitting element 41 and receiving the light by the light receiving element 42 are formed on the respective opposing surfaces of the cover 44. The opening width of each optical path slit 44a, that is, the optical path width from the light emitting element 41 to the light receiving element 42 is smaller than the width of the slit 30a of the board 30 and the width of each light shielding part 30b. In this embodiment, the photo interrupter 40 having two sets of the light emitting element 41 and the light receiving element 42 is used.

  The photo-interrupter 40 is covered from above so that the board 30 exists between the opposing light-emitting element 41 and light-receiving element 42 while being fixed to the inner surface of the top wall of the cover 50. In other words, the light emitting element 41 and the light receiving element 42 are opposed to each other with the board 30 interposed therebetween, and an optical path from the light emitting element 41 to the light receiving element 42 (an optical path whose width is limited by the optical path slit 44a and has a band shape) is blocked by the board 30. Is done. In addition, the photointerrupter 40 of the present embodiment has two sets of the light emitting element 41 and the light receiving element 42, so that the light emitting element 41 and the light receiving element 42 are arranged at two places in the sliding direction of the board 30. .

  In the present embodiment, in a still water state (initial state) shown in FIG. 2 where water does not move, one of the pair of elements 41 and 42 provided in two places is one of the elements 41 and 42 of the slit board 30. The other elements 41 and 42 are opposed to the light shielding unit 30 so as to straddle the light shielding unit 30b and the slit 30a. That is, in the initial state shown in FIG. 2, one light receiving element 41 cannot receive light from the opposing light emitting element 42, but the other light receiving element 41 can receive light from the opposing light emitting element 42. Has become.

  The cover 50 is also a resin molded product, and has an upper portion in a box shape with an open lower surface, and a lower portion with an opening at both axial end surfaces and the lower surface of the hollow cylindrical frame 10. Therefore, when covered by the cover 50, the upper part of the top wall of the hollow cylindrical frame 10 is entirely covered by the cover 50, but the axial ends of the hollow cylindrical frame 10 are not covered by the cover 50. An engagement claw 50a is formed on the lower edge of the cover 50. Therefore, when the cover 50 is mounted on the hollow cylindrical frame 10, the engaging claws 50 a of the cover 50 engage with the lower surface of the hollow cylindrical frame 10 and are fixed.

  Next, the principle of detecting the movement of water by the water swing detection device 100 will be described. In the initial state (hydrostatic state) shown in FIG. 2, the left light path slit 44 a is blocked by the light blocking part 30 b on the basis of the drawing (hereinafter, for convenience of description, this direction will be referred to), so that the light receiving element 42 Cannot receive light from the light emitting element 41. On the other hand, since the right optical path slit 44a straddles the slit 30a, the light from the light emitting element 41 is received by the light receiving element 42.

  Then, when a water flow or pressure fluctuation occurs and the water in the hollow cylindrical frame 10 moves, the pressure receiving plate 20 receives the water pressure and swings around the fulcrum body 22. Along with this, the tip of the column 21 swings around the fulcrum body 22 in the direction opposite to the pressure receiving plate 20. Then, the board 30 slides following the pressure receiving plate 20 because the tip of the column 21 is in the recess 30c. Accordingly, the positional relationship between the respective optical path slits 44a and the slit board 30 is shifted, so that the light receiving state of the light receiving element 42 changes, and the movement of water can be detected and detected as a voltage change.

  Since the strength of the water flow and the like and the water pressure received by the pressure receiving plate 20 are proportional to each other, the larger the water flow and the like, the more the swing amount (swing angle) of the pressure receiving plate 20 and, consequently, the sliding amount of the board 30 following the same. growing. Accordingly, the light receiving element 42 repeats the light receiving state and the non-light receiving state. By measuring the number of repetitions of the light receiving state and the non-light receiving state, that is, the number of voltage changes, the strength of the water current and the like and the fluctuation of the water are also measured. It can also be detected.

  Further, in the present embodiment, since two sets of the elements 41 and 42 are provided side by side in the sliding direction of the board 30, the direction of movement of water can also be detected. Specifically, for example, when water moves to the left as shown in FIG. 4, the board 30 slides to the right. Then, the light receiving element 42 on the left side (one side), which was in the non-light receiving state in the initial state, is in the light receiving state at the time of initial operation. On the other hand, the light receiving element 42 on the right side (the other side), which was in the light receiving state in the initial state, is in the non-light receiving state in the initial operation. Conversely, when the water moves to the right as shown in FIG. 5, the board 30 slides to the left. Then, the light receiving element 42 on the left side (one side), which was in the non-light receiving state in the initial state, is in the light receiving state at the time of initial operation. On the other hand, the light receiving element 42 on the right side (the other side) which was in the light receiving state in the initial state is maintained in the light receiving state even when the light receiving element 42 on the left side is in the light receiving state at the time of initial movement. As described above, the light receiving state at the time of the initial movement by the light receiving element 42 differs depending on the direction in which the water moves, so that the direction in which the water moves can also be detected.

  Further, as shown in FIG. 6, the board 30 may be formed in an arc shape (Modification 1). In this case, since the sliding width of the board 30 is smaller than that in the case of a rectangular shape, the size of the device can be reduced. Note that even when the board 30 has an arc shape, the board 30 is sandwiched between the opposing light emitting element 41 and light receiving element 42. Further, the relative positional relationship between the slits 30a and the light shielding portions 30b on the board 30 and the light emitting elements 41 and the light receiving elements 42 may be the same as in the case of the rectangular shape described above.

  As shown in FIG. 7, a tapered flange 12 whose opening area gradually increases toward the tip (outward in the axial direction) is provided at both ends in the axial direction of the hollow cylindrical frame 10, and the axial direction of the hollow cylindrical frame 10 is increased. Both ends may have a trumpet shape (Modification 2). According to this, since the movement of water is easily guided into the hollow cylindrical frame 10 by the tapered flange 12, the detection accuracy of the movement of water can be improved.

  If it is not necessary to detect the direction of movement of water, only one pair of the light emitting element 41 and the light receiving element 42 may be opposed. Further, even when two pairs of opposing light emitting elements 41 and light receiving elements 42 are provided side by side, the two light receiving elements 42 may be set so that the light receiving / non-light receiving state is simultaneously switched.

  In the present embodiment, both axial end surfaces are open. However, the present invention is not limited to such an aspect, and it is sufficient that at least the hollow cylindrical frame 10 receives water injection. It suffices that a part of the end face of the opening 10 is opened so that water can be received.

  In the present embodiment, a plurality of slits 30a and light-shielding portions 30b are arranged on the board 30, but the present invention is not limited to such an embodiment. If the swing of the board 30 changes the amount of light received by the light receiving element 42 and the swing of water in the hollow cylindrical frame 10 can be detected, the board 30 is provided with the slit 30a. It does not matter. Further, the slits 30a do not necessarily have to be arranged at equal intervals, the widths of the light shielding portions 30b and the slits 30a do not have to be the same, and the slits 30a and the light shielding portions 30b do not have the same width. Is also good. Although the two light receiving elements 42 in the present embodiment detect the light receiving state and the non-light receiving state and measure the number of repetitions, the swing of water is detected. The present invention is not limited to such an embodiment. For example, a pair of a light emitting element 41 and a light receiving element 42 are arranged, and the swing of water is detected based on a change in the amount of light received by the light receiving element 42. You may.

  The water swing detection device 100 according to the present embodiment can be used not only for detecting a movement of water in a facility or a structure for storing water, such as a water tank, a reservoir, or a pool, but also in a bathtub. For example, in a water storage facility or structure such as a water storage tank, a water reservoir, or a pool, if the movement of water is detected in a still water state where water is not used, it is possible to detect that the foreign matter has submerged. Further, it is possible to avoid occurrence of a water accident when a person falls into the water.

[Second embodiment]
Next, a bathing system 200 according to a second embodiment will be described. As shown in FIG. 8, the bathing system 200 includes a water swing detection device 100, a bathtub 101, a relay panel unit 102, and a notification unit 104.

  As shown in the figure, the water swing detection device 100 can be used for preventing an accident in a bathtub of a bather (especially an elderly person or a disabled person). In the second embodiment, a water swing detection device 100 is embedded in an inner wall surface of a bathtub 101, and a signal from the water swing detection device 100 is transmitted to a relay panel unit 102 existing in a bathroom. It should be noted that the water swing detection device 100 can be installed in various ways as long as water can enter the hollow cylindrical frame 10. Specifically, it may be floated on the water surface, may be attached to the inner surface of the bathtub, or may be configured to be integrated with an assisting device such as a handrail in the bathtub.

  The relay panel unit 102 is arranged near the bathtub 101 and has a configuration including an operation panel for an operation of additional cooking, an audio output unit, a timer processing unit, and the like.

  In the present embodiment, the behavior of the bather can be detected by the movement of the water (hot water) accumulated in the bathtub by the water swing detection device 100. Specifically, when hot water is poured into the bathtub 101, when a set amount of hot water is stored and a bather takes a bath, when the bather goes out, the swing of the pressure receiving plate 20 and the board 30 is different. Therefore, the bathing state can be determined based on the signal received by the relay panel unit 102.

  When pouring water into the bathtub 101, if the water swing detection device 100 is below the surface of the water, the water continues to move regularly while the hot water is stored in the bathtub, so that the hot water is stored. Can also be detected. When a predetermined amount of hot water is accumulated and the supply of water stops, the shaking converges and the water becomes still. This makes it possible to detect that the set amount of hot water has accumulated. When the water swing detection device 100 is floated on the water surface, there is an advantage that the water supply state and the still water state can be detected regardless of the amount of hot water supplied (the height of the water surface). Also, there is an advantage that the labor for installing the water swing detection device 100 in the bathtub 101 can be omitted.

  When the water swing detection device 100 is installed in the bathtub 101, it is preferable that the water oscillation detection device 100 be installed at a height position where hot water enters the hollow cylindrical frame 10 even when at least a minimum amount of hot water is stored. When a certain amount of hot water has accumulated and the water surface has reached a level equal to or higher than the height position of the water swing detection device 100, it can be detected that the water supply has been stopped and a still water state has been reached.

  Then, when the bather immerses in the bathtub from the still water state, the water moves again, so that it can be detected that the bather has begun bathing. At the time of entering and exiting the bath, the fluctuation of the water surface of the bathtub 101 becomes large, so that the pressure receiving plate 20 and the board 30 of the water swing detection device 100 swing greatly. Further, the direction in which water pressure is applied to the pressure receiving plate 20 when a bather takes a bath and the direction in which water pressure is applied to the pressure receiving plate 20 when taking a bath tend to be opposite to each other. By arranging two pairs of the light emitting element 41 and the light receiving element 42 as in the water swing detection device 100, it is possible to determine whether to enter or leave the bath.

  When the bather in the bathtub 101 is taking a bath, the swaying motion of the water during the bathing tends to converge faster than the swaying motion of the water after the bathing because the bather functions as a buffer. Therefore, bathing may be determined based on the convergence time of such a swing, and when the convergence time is equal to or longer than a predetermined time, it is determined that the movement is a swaying motion of water when taking a bath. You may make it. A bathtub of a general household having a volume of 150 liters or more and 250 liters or less becomes a still water state within about one minute after bathing when the bather is immersed in hot water and maintains a predetermined posture.

  Then, in a state where the bather is rising or there is a risk of drowning, the still water state in the bathtub 101 tends to continue for a long time. When the relay panel unit 102 determines that there is an abnormality in the bather by receiving a signal from the water swing detection device 100, the relay panel unit 102 transmits the notification to the notification unit 103 connected by wire or wirelessly. . The caregiver or the like can receive the alarm from the notification means 103 and go to the bather for safety confirmation.

  Specifically, it is rare for a bather to change his / her posture in the bathtub at all, and usually moves his limbs or torso. Therefore, in the bathing system 200 of the second embodiment, when the water swing detection device 100 does not detect the water swing due to such behavior for a predetermined period, an alarm is sent from the relay panel 102 to the notification unit 103. The instruction to generate is transmitted.

  Drawing 9 is a figure showing an example of processing of bathing system 200 of a 2nd embodiment. In the bathing watching process shown in the figure, first, a process (S111) of detecting bathing of a bather in the bathtub 102 is executed. In the present embodiment, bathing is detected by detecting a large sway of water that exceeds a predetermined threshold and period after detecting water injection.

  Thereafter, in S112, a process of detecting that the swing of the water has converged is performed. The convergence referred to here may be a state in which the water flow in the bathtub 101 has completely disappeared, or a state in which the water oscillates slightly in the bathtub 101 with a slight water swing remaining. It may be in a state. After the water swing detection device 100 detects the convergence of the water swing, the timer processing unit of the relay panel unit 102 starts the process of measuring the time (S113).

  Then, in S114a and S114b, a process of detecting the water swing caused by the bather changing his posture or the water swing caused by taking a bath is performed. Specifically, if the swing of the water is larger than a predetermined threshold value or period (YES in S114b), it is determined that the person has taken a bath, and the bathing watching process is terminated. . Further, when the water fluctuation detecting device 100 detects the water fluctuation and the water fluctuation is relatively small such that the water fluctuation does not exceed a predetermined threshold value or period (NO in S114b). Is returned to the processing of S112, and the measurement of the still water time is initialized (S113).

  Then, after the start of the time measurement process (S113), if a predetermined period has elapsed in the still water state without detecting water swing (in the case of YES in S114c), a signal is sent from the relay panel unit 102 to the notification unit 103. The information is transmitted and an alarm is output to the caregiver (S115).

  As the time measurement processing in S113 and S1114c, the setting may be such that the caregiver can be notified at a timing of 30 seconds or more and 180 seconds or less after the convergence of the water swing, or 40 seconds or more and 150 seconds or less. The caregiver may be notified at the timing. Further, it is preferable that the caregiver be notified at a timing of 50 seconds or more and 120 seconds or less, or 60 seconds or more and 90 seconds or less, and the setting may be made in such a range.

  In the second embodiment, the notification means 103 is installed outside the bathroom to emit a caution sound or a caution sound to a caregiver. For example, the notification means 103 is placed in the bathroom to take a bath. A caution sound or a caution sound may be emitted directly to the person to encourage movement. When the movement of the water is detected after the generation of the caution sound, it is understood that the bather is conscious. On the other hand, if the movement of the water cannot be detected, it is likely that some kind of problem has occurred, such as the bather losing consciousness. Is also good. In addition, the notification means 103 is not limited to generating a warning sound or the like as described above, and may be, for example, a means for blinking a warning light or a means for outputting a sound such as "Are you OK?" There may be.

  In the second embodiment, the detection of bathing and bathing is performed by the water swing detection device 100. However, the present invention is not limited to such an embodiment. For example, the relay panel unit 102 in the bathroom may be used. It is also possible to determine whether to enter or leave the bathtub 101 by another means such as an infrared sensor disposed in the above.

  Note that the detection signal from the water swing detection device 100 is not limited to being transmitted by connecting a cord (not shown) extending from the circuit board 43 to the relay panel unit 102, and may be, for example, an external PC or a notification unit. 103 or a wireless signal may be sent to the PC or the notification means 103 by radio waves.

  The present invention is not limited to the embodiments described above, and various modifications are possible. For example, the configuration described in the above embodiment can be replaced by a configuration having substantially the same configuration, a configuration having the same operation and effect, or a configuration capable of achieving the same object.

Reference Signs List 10 hollow cylindrical frame 20 pressure receiving plate 22 fulcrum body 30 board 30a slit 30b light shielding part 0
Reference Signs List 40 photo interrupter 41 light emitting element 42 light receiving element 43 circuit board 44a optical path slit 50 cover 50a engaging claw 100 water swing detecting device 101 bathtub 102 relay panel 103 notification means

Claims (5)

A hollow cylindrical frame that can accept water injection from the outside,
A pressure receiving plate slidably arranged inside the hollow cylindrical frame,
A board that slides following the swing of the pressure receiving plate,
A water swing detection device comprising: a light emitting element and a light receiving element arranged to face each other so as to sandwich the board,
The board slides with the swing of the pressure receiving plate due to the movement of water present in the hollow cylindrical frame, and changes the amount of light from the light emitting element detected by the light receiving element.
A water swing detection device, characterized in that: It is a water swing detection device according to claim 1,
The board is provided with one or more slits,
A water swing detection device, characterized in that: A water swing detection device according to claim 2,
On the board, a plurality of slits are arranged side by side,
The optical path width of the light emitting element is smaller than the width of the slit, and the width of the light shielding portion existing between the slits,
A water swing detection device, characterized in that: A bathtub for bathing,
A water swing detection device that is provided in the bathtub and detects water swing in the bathtub,
Notification means for notifying a caregiver or the bather when the water swing by the water swing detection device is not detected for a predetermined period of time after the bather takes a bath in the bathtub. hand,
The water swing detection device,
A hollow cylindrical frame that can accept water injection from the outside,
A pressure receiving plate slidably arranged inside the hollow cylindrical frame,
A board that slides following the swing of the pressure receiving plate,
A light-emitting element and a light-receiving element arranged to face each other so as to sandwich the board,
The board slides with the swing of the pressure receiving plate due to the movement of water present in the hollow cylindrical frame, and changes the amount of light from the light emitting element detected by the light receiving element.
A bathing system characterized by the following. A hollow cylindrical frame that can accept water injection from the outside,
A pressure receiving plate slidably arranged inside the hollow cylindrical frame,
A board that slides following the swing of the pressure receiving plate,
A water oscillation detection method using a water oscillation detection device including a light emitting element and a light receiving element that are arranged to face each other so as to sandwich the board,
The board slides with the swing of the pressure receiving plate due to the movement of water present in the hollow cylindrical frame, and changes the amount of light from the light emitting element detected by the light receiving element.
A water swing detection method characterized by the above-mentioned.

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