JP2002288758A - Human body detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a human body detector provided with both functions of measurement of a heart rate and detection of a human body, to reduce troublesome inconvenience that an alarm of the human body detector sounds during the measurement of the heart rate. SOLUTION: This detector is provided with an alarm notification momentarily-stopping means for stopping for a while an alarm notification function in an alarming means when stopping of movement of the human body is detected by a human body detecting sensor, and when the heart rate by a heart rate determining means is within a prescribed range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting a movement of a human body by capturing an image of a monitoring area at predetermined time intervals, and detecting an abnormality such as a stop of the movement of the human body. The present invention relates to a human body detecting device that issues an alarm to a human body.

[0002]

2. Description of the Related Art Conventionally, movement of a human body in a bathroom is detected,
2. Description of the Related Art There is known a human detection device that alerts another person of an abnormal state when the movement of a human body stops.
On the other hand, there is also known a heart rate measuring device which is set in a bathtub of a bathroom of a general household so that an elderly person can measure his own heart rate when taking a bath and easily check his or her own health condition. For example, this measuring device is provided with a pair of electrodes in contact with water on the inner surface of the bathtub, amplifies a signal proportional to the heartbeat of the bather detected by this electrode, counts and displays the heart rate on a digital display unit. This is convenient because the measurement of the heart rate is automatically started when taking a bath in the bathtub.

[0003]

However, when the above-described human detection device and heart rate measurement device are installed in a bathroom in parallel, the detection target of the human detection device is a state where a person does not move (for example, when a person is in a bathtub). Heartbeat measuring device), while it is determined that the person has stopped on the condition that the person is stopped, whereas the heart rate measurement device cannot perform accurate measurement unless the person is stationary and detects it. While doing this measurement,
The human detection device determines that the movement of the person has stopped,
There has been a problem that, even though there is no abnormality, an alarm is sounded by notifying another person that an abnormal state has occurred.

[0004] In view of the above problems, the present invention improves a human body detection device having both functions of heart rate measurement and human body detection, and an alarm sound of the human body detection device sounds during heart rate measurement. It is an object to reduce the complexity of this.

[0005]

In order to solve the above-mentioned problems, a human body detecting device according to the present invention comprises a human body detecting sensor for detecting a human body, and a remote control when detecting a stop of the movement of the human body by the human body detecting sensor. Alarm means for notifying an alarm to a location,
A heart rate sensor for measuring a heart rate of a bather; and a heart rate determination means for determining whether or not the heart rate is within a certain range, wherein the human body detection sensor stops the movement of the human body. The first feature is that an alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means when a heart rate is within a certain range by the heart rate determination means when the alarm is detected is provided. I have. According to the first feature, even if it is determined that the movement of the human body is stopped during the measurement of the heart rate, the heart rate is within a certain range, for example, the range of the heart rate when in a healthy state. If it is within, it is unlikely that you are in an abnormal state,
By temporarily stopping the alarm notification, it is possible to prevent the generation of the alarm sound by the alarm notification subsequent to the detection of the stop. If the heart rate is not within a certain range, it is safe to be alerted to another person.

Further, the human body detection device of the present invention comprises a human body detection sensor for detecting a human body, alarm means for notifying an alarm to a remote location when the human body detection sensor stops the movement of the human body, A heart rate sensor that measures the heart rate of a person, and a spontaneous measurement switch that is used when the bather voluntarily measures the heart rate, when the stop of the movement of the human body is detected by the human body detection sensor. A second feature is that an alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means when the spontaneous measurement switch is used is provided. According to the second feature, even if it is determined that the movement of the human body is stopped during the measurement of the heart rate, if the spontaneous measurement switch is used, the bather can use his or her own. Since the heart rate is measured voluntarily and it is unlikely that the system is in an abnormal state, it is possible to temporarily stop the alarm notification to prevent the alarm sound following the detection of the stop from sounding. You can do it. If the spontaneous measurement switch is not turned on, the alarm is normally notified to the other person, which is safe. Further, the human body detection device of the present invention includes a human body detection sensor for detecting a human body, an alarm unit for notifying an alarm to a remote location when the human body detection sensor detects the stop of the movement of the human body, and a heart rate of the bather. Heart rate sensor, heart rate determination means for determining whether the heart rate is within a certain range, alarm notification temporary stop means for temporarily stopping the alarm notification function of the alarm means,
Primary stop release means for releasing the pause state of the alarm notification by the alarm notification temporary stop means,
When the heart rate determination unit determines that the heart rate is not within a predetermined range during the suspension by the alarm notification suspension unit, the temporary stop release unit cancels the suspension state of the alarm notification when the heart rate does not fall within the predetermined range. Features.
According to the third feature, even if the abnormal state suddenly occurs during the temporary stop, when the heart rate determining means determines that the heart rate is out of the predetermined range, the alarm notification is temporarily stopped. When the state is canceled, an alarm can be issued to another person.

Further, the human body detecting device of the present invention includes an imaging device for imaging a monitoring area at predetermined time intervals, an area dividing means for dividing a detection area into an entrance area and an area other than the entrance area, and a motion amount of the human body. Motion amount calculating means for calculating the difference between the received light amount by comparing the two images before and after the predetermined time interval,
Motion presence / absence determination means for determining the presence / absence of motion by the motion amount calculation means; determination means for determining that the movement of the human body has stopped by the motion presence / absence determination means and motion presence / absence detection means; Alarm means for notifying an alarm to a remote location when detecting the heart rate, a heart rate sensor for measuring the heart rate of the bather, a heart rate determination means for determining whether the heart rate is within a certain range, When a stop of the movement of the human body is detected by the human body detection sensor and the heart rate is within a certain range by the heart rate determination means, an alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means is provided. This is a fourth feature of the present invention. According to the fourth feature, it is possible to reliably specify the area where the movement has stopped,
The reliability of the detection can be improved, and furthermore, by temporarily stopping the alarm notification, it is possible to prevent the generation of the alarm sound by the alarm notification subsequent to the detection of the stop. If the heart rate does not fall within a certain range, another person is alerted to the fact that the user has fallen in the bathtub, which is safe.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. FIG. 2 is a block diagram of an electric circuit showing one embodiment of the present invention. FIG. 3 is a circuit diagram showing a configuration of an image core circuit constituting one pixel of the image detection unit of the human body detection sensor. FIG. 4 is an explanatory diagram showing the relationship between the sensor and the alarm notification control unit. FIG. 5 is a control flowchart showing an embodiment of the present invention. FIG. 6 is a flowchart of the alarm notification control according to the embodiment of the present invention. FIG. 7 is an explanatory diagram of one embodiment showing a relationship among a human body detection sensor, a heart rate sensor, a hot water device, and a remote controller. FIG. 8 is a block diagram of electric control according to another embodiment showing a relationship among a human body detection sensor, a heart rate sensor, a hot water device, and a remote controller. FIG. 9 is a flowchart of an alarm notification control according to another embodiment. 10A is a diagram showing a current image and a previous image of the object moved toward the lower right, FIG. 10B is a diagram showing the brightness of the previous image for each pixel, and FIG. 10C is a diagram showing the brightness of the current image. It is a figure shown for every pixel. FIG. 11 is a diagram illustrating a difference image showing a change in brightness at a pixel corresponding to the boundary of the image. FIG. 12 is an electric circuit block diagram showing one embodiment, and FIG. 13 is a flowchart of alarm notification control showing another embodiment. FIG. 14 is an electric circuit block diagram showing another embodiment. FIG. 15 is a flowchart of an alarm notification control according to another embodiment.

FIG. 1 schematically shows an embodiment of the present invention. A bath 1 and a washing tub 3 are provided inside a bathroom 1. Reference numeral 4 denotes an entrance to the bathroom 1. Reference numeral 5 denotes a human body sensor, which is attached to the upper part of the inner wall surface of the bathroom 1, as will be described in detail later. Specifically, it is attached to the upper part of the bathroom wall surface facing the bathroom wall surface in contact with the longitudinal direction of the bathtub 2. The human body sensor 5 is mounted on the wall surface of the bathroom 1 in the present embodiment, but is not limited to this example, and may be mounted on the ceiling surface of the bathroom 1. Human body sensor 5
Is a human body detection sensor 5 that has an imaging device using an artificial retina, and that captures an image of the movement of the human body in the bathroom 1 and performs image processing.
1 and an infrared sensor 52 for detecting a human body by heat detection using infrared rays.

A bathroom 1 has a bath remote control 60 for remotely controlling the hot water equipment 40, and a kitchen has a kitchen remote control 70 for remotely controlling the hot water equipment 40. Here, the hot water device 40 is a device for heating water such as hot water in a bathtub, and is specifically configured by a bath kettle with a water heater, a heater with a water heater, a hot water heater, a water heater, and the like. I have. The hot water equipment may be not only gas-fueled but also oil-fueled.

[0011] The water heater 40, the remote controllers 60 and 70,
With respect to the connection with the human body detection sensor 51, in FIG. 1, the hot water appliance 40 and the kitchen remote controller 70 are first connected by the cable 41, then the kitchen remote controller 70 and the bath remote controller 60 are connected by the cable 41, Further, the bath remote controller 60 and the human body detection sensor 51 are connected to the cable 41.
Connected.

The remote controllers 60 and 70 for controlling the water heater and the like have a display unit such as a liquid crystal display panel for notifying that a bather is present in the bathroom 1.
When the user detects a bather and outputs a detection signal, the display unit may display a light or the like.

The display unit is not limited to the above-mentioned one. If there is no movement of the bather for a certain period of time, it is presumed that the bather is sleeping or falling down, and the bath remote controller 60 first alerts the user with an alarm sound or voice. If there is no response from the bathroom within a predetermined period of time, the kitchen remote controller 70 may notify another person such as a family by an alarm sound or voice.

A heat exchanger and a burner are built in the hot water equipment 40, and various sensors for control are provided. A hot water supply pipe 46 is connected from the hot water equipment 40 to the bathtub 2. The power for operating the human body sensor 5 is introduced from a power plug 47 of the hot water device 40, and is lowered in voltage and supplied to a low voltage via a transformer (not shown) of the controller 42 of the hot water device 40.

The bathtub 2 is provided with an electrode 121 of a heart rate sensor 120 for detecting a human heart rate. This heart rate sensor 120 has a connection cord 1 as shown in FIG.
It comprises an electrode 121 connected to 22, an amplifier 123 for amplifying a signal, an A / D converter 124, and an alarm notification control unit 125 composed of a microcomputer.

When measuring the heart rate, the bathtub 2
The subject enters the bathtub 2 and turns on the power switch. Thus, the electromotive force caused by the operating current of the subject's heart is introduced as a potential difference appearing between the electrodes using water as a conduction path, amplified, converted into a digital signal, processed by the CPU, and processed as data by the CPU 64 as a heart rate. It is designed to display digitally. Normally, this measurement is automatically performed by entering the bathtub 2. However, when the bather wants to start measurement consciously, the measurement switch 12 is used.
6 can be measured by turning it on. In particular, it is effective to operate the measurement switch 126 when accurate measurement cannot be performed due to noise during automatic measurement.

A signal from the human body detection sensor 51 is also input to the alarm notification control unit 125.
In this embodiment, the alarm notification control unit 125 is built in the bath remote controller 60, but may be separately provided as a separate operation case.

FIG. 2 shows a specific configuration of a human body sensor 5 including a human body detection sensor 51 using an artificial retinal chip and an infrared sensor 52. Human body detection sensor 51
Is composed of an imaging device 6 for imaging the monitoring area, and a control device 7 for controlling the imaging device 6 and determining processing information. Further, the control device 7 and the external remote controller 60,
The communication with the communication unit 70 is, for example, a communication unit 53 such as a communication IC described later.
To transmit and receive. An infrared sensor 52 is provided in the same case as the infrared sensor 52 in addition to the human body detection sensor 51, and the control device 7 is shared, so that the monitoring when the bathroom 1 is dark is mutually supplemented.

The image pickup unit 8 of the image pickup device 6 includes a low-resolution image detector 9 composed of 32 × 32 pixels (= 1024 pixels), an imaging lens 10, a scanner 11, a multiplexer 12, and a scanner drive controller 13. It is composed of If RAM capacity allows, more pixels (128
× 128 pixels in the horizontal direction), or a large number of pixels may be thinned out and a part of them may be subjected to detection processing. The pixels of the image detection unit 9 have monochrome 256 gradations “level 0 (black) to
255 (white), 256 gradations ".

Then, in the imaging section 8, an image in the bathroom is formed on the image detection section 9 by the imaging lens 10. The drive of the scanner 11 is controlled by a scanner drive control unit 13, and the scanner drive control unit 13 controls each pixel row of the image detection unit 9 so as to sequentially enter a light receiving state (on state) at regular intervals. . A plurality of electric signals are combined into one electric signal by the multiplexer 12 and amplified by the amplifier 14, and then output as an analog voltage. The conversion from analog data to digital data is performed by the control device 7.

Each pixel of the image detecting section 9 is constituted by a pixel core circuit 17 as shown in FIG. The pixel core circuit 17 includes a light receiving element 18, a charge storage circuit 19, and a sensitivity variable circuit 20.
The reset terminal 22 is connected to the scanner 11, and the photocurrent output terminal 23 is connected to the multiplexer 12.

In FIG. 2, the gain adjustment unit 16 checks the image average value (brightness of the image) in the image output unit 15, and if the image average value is out of an appropriate range, the amplifier 14 controls the imaging device 6 The gain is adjusted, and the accumulation time of the image detection unit 9 is adjusted by the scanner drive control unit 13 so that the light is adjusted so that an image with appropriate brightness is obtained. This dimming may be performed for each of the divided detection areas described later.

In the imaging device 6 using the artificial retina, the image average value is the gradation of all the pixels constituting the image detecting section 9 (256 gradations from 0 gradation (black) to 255 gradation (white)). It is an average value and is represented by a value from 0 to 255. The average value of the image is determined by the gain of the amplifier 14 and the accumulation time of the image detector 9.

In FIG. 2, at least an image detecting section 9, a scanner 11, and a scanner driving section 1 which perform image pickup.
3 and the gain adjustment unit 16 are formed by one chip.
This chip is called an artificial retinal chip. A control device 7 is provided at a position on the back surface of the chip. The control device 7 is formed of a microcomputer, and internally divides a detection area for performing a detection process by the human body detection sensor 51 into a plurality of areas. The area dividing means 24 and the like are incorporated as software.

More specifically, a point table for processing image information input to the control device 7 is divided into a plurality of areas. That is, the imaging capability range detectable by the human body detection sensor 51 (corresponding to the entire point table)
Is divided into a detection area where image processing is required and a non-detection area where image processing is not performed.

Further, the detection area is divided into three areas: an entrance area, a washing area, and a bathtub area. The division of the detection area is not limited to this example, and the detection area may be divided into two parts, an entrance area and an area other than the entrance area. For example, the washing area and the bathtub area
It can be set even in one area. Here, the entrance area means an area located in the bathroom in the case of a bathroom and near an entrance door to the bathroom. The washing area refers to an area of the floor where the head and body are mainly washed, and the bathtub area refers to an area where the bathtub is located. Image information is sequentially input to the control device for each of the divided regions, and processing such as detection and calculation is performed for each region.

The imaging lens 10, the imaging device 6, and the control device 7 constituting the human body sensor 51 are housed in one case together with the infrared sensor 52, and mounted on a wall or the like as a human body sensor set. The mounting position may include the entire bathroom 1 including the entrance 4 to the bathroom within the viewing angle as a monitoring area.

Then, the detection output of the imaging device 6 and the detection output of the infrared sensor 52 are input to the judgment means 32, respectively. The determining means 32 comprehensively determines the presence or absence of a bather and the movement of the bather in the bathroom based on the output from the imaging device 6 and the output from the infrared sensor.

The image detected by the artificial retina is processed as follows. The control device 7 for controlling and processing the image includes:
When image information is received at predetermined time intervals from all the pixels constituting the image detection unit 9, and when image information is received at predetermined time intervals, the image information is processed, and the movement of the bather is determined by the determination means 32. .

Next, an image processing method for extracting a motion of a person from an image captured by the imaging device 6 will be described. When receiving the image information at predetermined time intervals, the control device 7 constituted by a microcomputer analyzes the movement of the bather from the image information according to a predetermined analysis algorithm, and monitors the movement of the bather.

More specifically, as shown in FIG. 10A, an image (bright image) P of a square object is moved from position P1 to position P2.
Suppose you moved to At this time, if a bright pixel is represented by a symbol B and a dark pixel is represented by a symbol D, the previous image is represented by FIG. 10B and the current image is represented by FIG. The images before and after this are temporarily stored by the image storage unit 115 of the control device 7 shown in FIG. The taken images are sequentially updated so that the latest two images are always stored. Then, the two images are compared for each of the divided areas by the motion amount calculating means 111, and for each pixel (x, y) of each area, the received light amount Pp (x, y) of the previous image p is calculated. The difference (movement amount) D (x, y) = Pn (x, y) -Pp (x, y) from the received light amount Pn (x, y) of the current image n is calculated, and the calculation result is as shown in FIG. The difference image can be obtained as follows.

In the difference image shown in FIG.
Pixels where (x, y) are positive are represented by + symbols, and negative pixels are-
Pixels in which D (x, y) is zero are represented by a symbol. By capturing the sum of such differences, it is possible to determine whether or not there is a motion for each region. This determination is performed by the motion presence / absence determining unit 114 of the control device 7. If there is no movement amount, it is determined that there is no movement, and if there is a movement amount, it is determined that there is movement.

On the other hand, the motion presence / absence area detection means 112 of the control device 7 detects whether or not each of the divided areas has a motion. That is, the captured image captured by the imaging device 6 is read into the control device 7 at regular intervals in the order of the entrance area, the washroom area, and the bathtub area, and a moving area is detected by analyzing the image data. It is like that. For example, a change in the photon voltage due to the movement of a person may be captured, and a region having a change may be regarded as a region having a motion, and the region may be detected. Or,
A region with a motion may be detected by capturing a region with a motion amount described above. That is, since the amount of motion is calculated for each area, the area where the amount of motion occurs is converted to the area having motion,
What is necessary is just to detect the area in which the amount of motion does not occur as the area without motion. Then, the specific area corresponding determination means 113 determines whether or not the area in which the motion occurs corresponds to the area specified in advance. The specific area means a bathtub area or a washing area in the case of a bathroom, and is an area excluding an entrance area. Specifically, the state transition table is stored in the microcomputer in advance, signals of the presence / absence of movement and the area of movement are input, and the monitoring place is sequentially transitioned so that the area where the current person is located is specified. It is determined whether the area is an area.

FIG. 14 shows another embodiment, which is provided with an entrance area corresponding judging means 116 for judging whether or not the last area where motion has stopped is an entrance area. Are the same as those in FIG.

The human body detection sensor has a sensitivity adjustment circuit for automatically adjusting the sensitivity. The sensitivity is increased when the interior of the bathroom 1 is dark, and is decreased when the interior of the bathroom 1 is bright. This increases the detection accuracy.

Next, determination of whether or not a person has entered the bathroom 1 will be described. In FIG. 5, when a person starts entering the bathroom 1, first, the infrared sensor 52 in a standby state detects a human body and is turned on (step S1), and a timer is set (step S2). When a person is detected in the washing room (step S
3) It is determined that the user has entered the room (step S4).

In this entry determination, the human body detection sensor 5
1 requires a long time for imaging and calculation of the amount of motion, or when the bathroom 1 is dark, the monitoring sensitivity is low. Therefore, the infrared sensor 52 is used in combination, The detection sensor 51 detects a person together, thereby compensating for the weakness of the human body detection sensor 51 and ensuring the entry into the room.

Also, when leaving the bathroom 1, the infrared sensor 52 is turned off (No in step S5), and the human body detection sensor 51 does not detect the amount of movement (in step S6). (No), it is determined that the person has left the bathroom 1 (step S7). If only the infrared sensor 52 is stopped at the entrance, it will be turned off, and it may be erroneously determined that the user has exited. This is complemented by the use of sensors.

Then, even when the human body detection sensor 51 does not detect a person in the washing room 3 (No in step S3), if a person is detected in the bathtub 2 (step S3).
8) If both the infrared sensor 52 and the human body detection sensor 51 detect a person within a predetermined time (step S
9, S10), it is determined that the person has entered the room (step S4). After determining that the person has entered the room, the timer may be set so that the detection continuation time of the sensor matches the average bathing time.

In FIG. 4, a human body detection sensor 51
And a signal from the heart rate sensor 120, the alarm notification control unit 125 for controlling alarm notification includes a heart rate determination unit 12 for determining whether the heart rate is within a certain range.
7, an alarm notification operating unit 128 for operating the alarm unit 61 such as a speaker, an alarm notification temporary stop unit 129 for temporarily stopping the alarm notification function for the alarm unit 61, and cancels the alarm notification pause state. Pause release means 130
Are provided. These are all programmed and incorporated as software in a microcomputer.

Next, a connection configuration of another embodiment between members such as a sensor and a remote controller constituting the entire apparatus will be described with reference to FIG. The bath remote controller 60 and the kitchen remote controller 70 are connected to a controller 90 of a controller in the water heater 40 via a cable 41 of a wired remote controller.

The human body detection sensor 51 is connected to the cable 41
Is connected to the bath remote control 60. The bath remote controller 60 is provided with a connection terminal 85 for connecting the cable 41, and supplies power for operating the human body detection sensor 51 and the heart rate sensor 120 from the bath remote controller 60. I have. The connection between the human body detection sensor 51, the heart rate sensor 120, and the hot water device 40 or the remote controllers 60 and 70 is not limited to the above-described example, and as shown in FIG. The kitchen remote controller 70 to be connected may be connected via the bath remote controller 60. Alternatively, the kitchen remote controller 70, the bath remote controller 60, and the hot water device 40 may be connected in this order via the communication IC.

In FIG. 7, the control unit 90 of the hot water equipment 40 includes a water heater control unit 91 for controlling the hot water equipment 40.
And an alarm notification control unit 92 that operates in response to an abnormality detection signal from the human body detection sensor 51 and a signal from the heart rate sensor and controls alarm notification. By providing the alarm notification control unit 92 on the hot water equipment side, it is possible to reduce the control burden on the remote controller side.

The bath remote controller 60 is provided with an intercom switch 62, an operation switch 63 for operating the hot water equipment, a liquid crystal display panel for displaying, and a display means 64 such as a touch panel. The kitchen remote controller 70 has an intercom switch 72, an operation switch 73 for operating the hot water equipment, and a display means 74 for display.
Etc. are provided. The alarm means 61 and 71 provided for each remote control for sound notification are provided with a speaker and a sound IC.
It is recommended to configure with

FIG. 8 shows a human body detection sensor 51 and a heart rate sensor 1.
FIG. 1 is an example of a circuit diagram showing a communication connection relationship between a remote controller 60, remote controllers 60 and 70, and hot water equipment 40.
Connected using. The human body detection sensor 51 is provided with a control unit 7 and a communication unit 53 including a communication IC for communication, in addition to the imaging device 6 described above. The communication unit 53 includes an analog communication unit 55 and a digital communication unit 56. The analog communication unit 55 is, for example, an ASK (amplitud
e shift keying). The digital communication unit 56 is, for example, a QPSK (quadri phase shift k).
eying) method, M16QAM, GFSK, BPSK
And the like may be adopted.

The bath remote controller 60 includes a display means 64 and a bath remote controller controller 6 in addition to the operation switches described above.
5. An analog communication unit 66 and a digital communication unit 67 similar to the above, each of which includes a communication IC for communication, are provided. Further, the bath remote controller 60 is provided with a sound IC 68 for notification and a PCM codec 69 on an alarm means 61 such as a speaker. The PCM codec 69 is, for example, an ADPC
PCM (pulse code modulation) such as M and DPCM
It encodes and decodes audio information and video information according to the method. The bath remote controller 65 is provided with an alarm controller for performing the above-described alarm control using the same microcomputer. Of course, they may be provided separately.

When the intercom switch 62 of the bath remote controller 60 is turned on, a communication with a speaker of the intercom provided on the kitchen remote controller 70 is established. It may also be used as a microphone switch. A connection terminal 85 for connecting the cable 41 is provided on a remote control case of the bath remote control 60.
1 supplies power for operation to the human body detection sensor 51 and the heart rate sensor 120 via the bath remote controller 60 via the kitchen remote controller 70 connected to the water heater 40.

Further, the human body detection sensor 51 is provided with a data storage section 54 comprising a voice storage section and an image storage section described later. The kitchen remote control 70 includes a display unit 74, a kitchen remote control control unit 75, an analog communication unit 76 including a communication IC for analog communication, and a digital communication unit 77 including a communication IC for digital communication, in addition to the operation switch 73 described above. It is provided. Reference numeral 78 denotes a voice IC which is an IC for informing the alarm means 71 such as a speaker, and 79 denotes a PC.
It is M codec. Further, the intercom switch 62 of the kitchen remote controller 70 is set to be in a talking state with a speaker of the intercom provided in the bath remote controller 60 by an ON operation. It may also be used as a microphone switch. The water heater 40 is provided with an analog communication unit 95 including a communication IC for communication, a transformer 96 for lowering the voltage of a commercial power supply, and the like, in addition to the control unit 90 and the hot water supply control unit 91 described above.

The analog communication section 55 and the digital communication section 56 of the human body detection sensor 51
The analog communication unit 66 and the digital communication unit 67 of the bath remote controller 60 are connected to the analog communication unit 66 and the digital communication unit 67 of the bathroom remote controller 70 via the analog communication unit 76 and the digital communication unit 77 of the kitchen remote controller 70. It is connected to the analog communication unit 95. The cable 41 between these communication units uses a power superimposition type two-core cable,
The signal for the sensor and the control signal for normal hot water supply control may be transmitted in a superimposed manner.

The data storage unit 54 includes an operation request notification voice storage unit that stores voice data for notifying a bather of a request to perform a body movement with a message “Please move”, And a warning notification voice storage unit that stores voice data for issuing a warning to another person when a predetermined time has elapsed after the movement of the user has stopped.

The image storage section of the data storage section 54 is for displaying the functions required for human body detection by means of an image. For example, an image storage section for displaying a screen required for an initial operation of human body detection on the display means. An operation image storage unit for storing data, a stopped image storage unit for storing image data for displaying a state in which the movement of the human body is stopped on the display unit, and a state for notifying the notification unit on the display unit. It comprises a notification image storage unit for storing image data and other storage units for storing data necessary for displaying images.

When operating the human body detecting device,
By operating an operation switch of the remote controller in advance, an initial screen image necessary for the operation is called out from the operation image storage unit of the human body detection sensor 51 on the display means 64, 74 and displayed, and a specific screen is selected from the screen. To start the operation. At the same time, a part of the voice data is called out from the voice storage unit of the human body detection sensor 51 and the voice is notified by the speakers 61 and 71.

Next, as shown in FIG. 6, when the above-mentioned entry judgment is made (step S11), the flow enters the detection flow for stopping the human body, and the imaging area is used to change the monitoring area at predetermined time intervals as described above. The control unit 7 captures the image and temporarily stores the previous image and the current image (step S12). Next, the motion amount calculating means 11 programmed in the control device 7
According to 1, the difference (movement amount) between the light reception amount of the previous image and the light reception amount of the current image is calculated for each pixel in each region (step S13). On the other hand, the area in which a motion has occurred is detected by the motion presence / absence area detecting means 112.

The information is sent to the judgment means 32 of the control device 7. In the judging means 32, the specified area corresponding judging means 113 judges whether or not the area in which the movement occurs corresponds to the previously specified area, that is, the bathtub area 31 or the washing area 30. Further, the determination means 32 determines in parallel whether or not there is a movement by the movement presence / absence determination means 114.

In the case where the area where movement has occurred corresponds to the bathtub area 31 or the washroom area 30 and if it is determined that there is no movement, it is assumed that the bather has fallen in the bathroom. It is determined that the movement of the person has stopped (step S15). With this stop determination, the above-described alarm notification operation means 128 shifts to the above-described alarm notification step.

Now, as shown in FIG. 6, when the bather is immersed in the bathtub 2 and is stationary, that is, the heart rate sensor 120 can automatically measure the bather's heart rate. In the case where the bather falls asleep in the bathtub (Yes in step S14), the human body detection sensor 51 determines that there is no movement in the bathtub and stops moving the human body, for example. (In the case of YES in step S15).

At this time, if the measured value is within a certain range by the heart rate judging means 127 (step S16), the alarm notification is temporarily stopped by the alarm notification temporary stop means 129 instead of immediately proceeding to the alarm notification. The function is temporarily stopped (step S17). Accordingly, when the heart rate is within a certain range, for example, within the range of the heart rate in a healthy state, it is not considered that an abnormal state has occurred, and the alarm notification function is temporarily stopped. By this, the sound of the motion request following the detection of the stop,
Alternatively, it is possible to prevent the alarm sound from sounding by the alarm notification.

Here, the “constant range” is a concept including not only a case where the measured heart rate is within a certain range but also a case where the measured heart rate is equal to or less than a certain value. When the heart rate is not within a certain range, or when a certain time has elapsed (step S
At 18), the warning is normally given to another person, and the operation is safe (step S19).

When the heart rate measurement is not being performed (NO in step S14), for example, when there is a bather in the wash area and it is determined that there is a motion (NO in step S20), The imaging, calculation, and determination are updated and repeated at predetermined time intervals. Also,
When the stop of the movement of the human body is detected (step S20)
In the case of YES), the alarm notification function is activated by the alarm notification operating means 128, and an alarm is notified to the above-mentioned alarm means (step S19).

FIG. 13 shows a further improvement of the above. Hereinafter, the same steps will be described with the same numbers. After the alarm notification function is temporarily stopped (Step S17), if the measured value of the heart rate is out of the predetermined range until the predetermined time elapses (No in Step S21) (Yes in Step S22). ), The temporary stop state of the alarm notification is released by the temporary stop release means 130 of the alarm notification control unit 125 (step S23).

As a result, even if the bather's condition suddenly changes within a certain period of time, the temporary stop state is released, the alarm notification function is activated, and another person is notified of an alarm. Become. The present invention is not limited to the examples shown in FIGS. 6 and 13, and other methods can be used. This will be described in accordance with the flow shown in FIG.

Steps common to those in FIG. 6 are assigned the same numbers, and are identical in that they are imaged at predetermined time intervals, the preceding and succeeding images are stored, and the motion amount for each area is calculated. Then, during the measurement of the heart rate (step S14), when the stop of the movement of the human body is determined by the human body detection sensor 51 (in the case of YES in step S15), the one shown in FIG. While it is determined whether or not it is within a certain range, FIG.
Is a measurement switch 126 provided on the bath remote control 60.
Is turned on (in the case of YES in step S24), the alarm notification temporary stop unit 129 temporarily stops the alarm notification function to the alarm unit (step S17).

Thus, if the bather voluntarily presses the switch, it is not considered that the bather has fallen into an abnormal state. Therefore, the alarm notification function is temporarily stopped.
It is possible to prevent the generation of the alarm sound by the alarm notification following the detection of the stop. After a predetermined time has elapsed (step S18), the alarm notification function is activated (step S19).

Further, the present invention may be a flow shown in FIG. This flow is in addition to that of FIG. 6, and when the stop of the movement of the human body is determined by the human body detection sensor 51 during the heart rate measurement (step S14) (step S15).
If the measurement value of the heart rate is out of the predetermined range (NO in step S16) and the measurement switch 126 is turned on (YES in step S25), Time (Step S2
6) The alarm notification function is temporarily stopped (step S17). If the bather presses the switch spontaneously, it is not considered to be in an abnormal state, so by temporarily stopping the warning notification function, the warning sound following the detection of the stop is output. Can be prevented from ringing.

After the lapse of a predetermined time (step S26)
If the answer is yes), the alarm notification function is activated. Of course, when the measurement switch 126 is out of the predetermined range (NO in step S16) and the measurement switch 126 is not pressed (step S25).
In the case of No, the alarm notification function is activated (step S19).

When the alarm notification function is activated, the operation request notification voice storage unit of the voice storage unit of the human body detection sensor 51 and the stop image storage unit of the image storage unit are read after the suspension time and the predetermined time have elapsed. The information stored in advance corresponding to the stopped scene is read out, and the analog communication unit 55
The information is transmitted through the digital communication unit 56, and is notified to the remote control unit by voice and displayed by an image. By supplying power to the human body detection sensor 51 from the remote controllers 60 and 70 for controlling the hot water equipment 40 and notifying by the remote controller,
Not only the wiring work is simplified, but it is not necessary to separately provide a sensor notification member.

More specifically, the notification may be made, for example, by voice information and a character image saying “No movement in the bathroom. Please move”. This is because the motion stops in the bathtub during the heart rate measurement, so that the bather is requested to move and the human body detection sensor is prevented from erroneous detection.

If the human body detection sensor 51 detects the movement, it can be inferred that the bather is alive. On the other hand, if the stop state continues for a predetermined time, it is determined that the state is abnormal, and a signal is output from the determination means 32. Information stored in advance for notification is transmitted to the abnormality detection signal via the communication unit 53, and the alarm means 61, 7 of each remote controller is transmitted.
1 and an image is displayed on the display means 64 and 74.

More specifically, the notification is made by voice information and a character image saying "Please go to the bathroom". Thus, the abnormality information of the human body by the human body detection sensor 51 can be simultaneously notified to the kitchen as well as the bathroom as an alarm.

The abnormality detection signal is transmitted as shown in FIG. 8 via a communication unit including a communication IC. That is, voice and image data are called from the data storage unit 54 provided in the human body detection sensor 51 in accordance with the above-described signal, and the kitchen remote controller 70 is transmitted through the analog and digital communication units 66 and 76.
To the alarm unit 71 such as a speaker provided on the kitchen remote controller 70 and the display unit 74 for display. Image detection and processing are performed for each of the regions 29, 30, and 31 described above, thereby increasing the response speed for notification and display.

The notification release after the notification may be performed by, for example, a signal of the intercom switch 62 for releasing the notification. By using the cable 41 for controlling the water heater from a remote position, it is not necessary to lay a special cable for transmitting the release command.

The above-described embodiment shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope. For example, in the present embodiment, the system bathroom has been described. However, the present invention is not limited to this example and can be installed in other existing bathrooms. Furthermore, in the present embodiment, an example is shown in which the sensor and the remote controller are connected by wire, but they can also be linked wirelessly. Further, the human body detection sensor may be a detection member using a CCD or infrared rays.

[0073]

As described above, according to the present invention, even if it is determined that the movement of the human body is stopped during the measurement of the heart rate, if the heart rate is within a certain range, the alarm is issued. By temporarily stopping the notification, it is possible to prevent the generation of the alarm sound by the alarm notification following the detection of the stop. Further, the present invention is to temporarily stop the alarm notification when the spontaneous measurement switch is used even if it is determined that the movement of the human body is stopped while measuring the heart rate. Thus, it is possible to prevent the generation of the alarm sound by the alarm notification following the detection of the stop. Furthermore, even if the present invention suddenly becomes abnormal during the pause, when the heart rate determination unit determines that the heart rate has deviated from the predetermined range, the pause state of the alarm notification is released. Usually, you can alert others. Further, according to the present invention, it is possible to reliably specify the area of the motion stop, improve the reliability of the detection, and temporarily stop the alarm notification, so that an alarm sound is generated by the alarm notification following the detection of the stop. Will be prevented. If the heart rate does not fall within a certain range, another person is alerted to the fact that the user has fallen in the bathtub, which is safe.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram of an electric circuit showing one embodiment of the present invention.

FIG. 3 is a circuit diagram showing a configuration of an image core circuit forming one pixel of an image detection unit of the human body detection sensor.

FIG. 4 is an explanatory diagram showing a relationship between a sensor and a warning notification control unit.

FIG. 5 is a flowchart showing an embodiment of the present invention.

FIG. 6 is a flowchart showing a flow of alarm notification control of the present invention.

FIG. 7 is a block diagram showing one embodiment showing the entire apparatus of the present invention.

FIG. 8 is a block diagram showing another embodiment showing a communication relationship.

FIG. 9 is a flowchart illustrating a flow of alarm notification control according to another embodiment.

10A is a diagram showing a current image and a previous image of an object moved to the lower right, FIG. 10B is a diagram showing the brightness of the previous image for each pixel, and FIG. FIG. 3 is a diagram illustrating lightness and darkness of an image for each pixel.

FIG. 11 is a diagram illustrating a difference image showing a change in brightness at a pixel corresponding to a boundary of an image.

FIG. 12 is an electric circuit block diagram showing one embodiment.

FIG. 13 is a flowchart illustrating a flow of alarm notification control according to another embodiment.

FIG. 14 is an electric circuit block diagram showing another embodiment.

FIG. 15 is a flowchart illustrating a flow of alarm notification control according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathroom 2 Bathtub 3 Washing place 4 Doorway 5 Human body sensor 6 Imaging device 7 Control device 9 Image detection part 15 Image output part 17 Image core circuit 24 Area division means 32 Judgment means 40 Hot water equipment 41 Cable 42 Controller 47 Power plug 51 Human body detection Sensor 52 Infrared sensor 54 Data storage unit 55 Analog communication unit 56 Digital communication unit 60 Bath remote control 61 Alarm means 66 Analog communication unit 67 Digital communication unit 70 Kitchen remote control 71 Alarm means 76 Analog communication unit 77 Digital communication unit 85 Terminal 90 Control unit 111 Movement amount calculation means 112 Motion presence / absence area detection means 113 Specific area corresponding determination means 114 Motion presence / absence determination means 116 Entrance area correspondence determination means 120 Heart rate sensor 121 Electrode 122 Connection code 123 Amplifier 125 Alarm notification control unit 12 6 Measurement switch 127 Heart rate determination means 128 Alarm notification operation means 129 Alarm notification temporary stop means 130 Temporary stop release means

Claims (4)

[Claims] 1. A human body detection sensor for detecting a human body, an alarm unit for notifying an alarm to a remote location when the human body detection sensor detects a stop of the movement of the human body, and a heart rate sensor for measuring a heart rate of a bather And a heart rate determining means for determining whether or not the heart rate is within a certain range, wherein the human body detection sensor detects the stop of the movement of the human body and the heart rate determination A human body detection device, further comprising an alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means when the heart rate is within a certain range by the means. 2. A human body detecting sensor for detecting a human body, alarm means for notifying an alarm to a remote location when the human body detecting sensor detects a stop of the movement of the human body, and a heart rate sensor for measuring a heart rate of a bather. And a spontaneous measurement switch used when the bather voluntarily measures the heart rate, wherein the spontaneous measurement switch is used when the human body detection sensor detects the stop of the movement of the human body. A human body detection device provided with an alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means. 3. A human body detection sensor for detecting a human body, alarm means for notifying an alarm to a remote place when the human body detection sensor detects a stop of the movement of the human body, and a heart rate sensor for measuring a heart rate of a bather. Heart rate determination means for determining whether the heart rate is within a certain range, alarm notification temporary stop means for temporarily stopping an alarm notification function of the alarm means, and alarm notification temporary stop means. Primary stop release means for releasing the pause state of the alarm notification, wherein the heart rate determination means determines that the heart rate is not within a certain range during the pause by the alarm notification temporary stop means. The human body detection device, wherein the temporary stop state of the alarm notification is released by the primary stop release means when the operation is performed. 4. An imaging device for capturing an image of a monitoring area at a predetermined time interval, area dividing means for dividing a detection area into an entrance area and an area other than the entrance area, and a motion amount of a human body before and after the predetermined time interval. A motion amount calculating means for calculating the difference in the amount of received light by comparing the images; a motion presence / absence determining means for determining the presence / absence of a motion by the motion amount calculating means; Determination means for determining that the movement has stopped; warning means for notifying a remote location of an alarm when the movement of the human body is detected; a heart rate sensor for measuring the heart rate of the bather; A heart rate determination means for determining whether or not the heart rate is within a predetermined range, and when the heart rate detection means detects that the movement of the human body has stopped and the heart rate is within a certain range, A human body detection device provided with alarm notification temporary stop means for temporarily stopping an alarm notification function of the notification means.