JP2003006758A - Human body detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human body detector which makes erroneous detection less probable, thereby eliminating troublesomeness, etc., due to erroneous warning thereafter. SOLUTION: A prescribed threshold is provided previously to the value of a moving quantity for deciding movement. Thus, only when a detected value by a moving quantity arithmetic means exceeds the threshold, the presence of the movement of a human body is decided. By obtaining this threshold in line with the movement of a person by an experiment, etc., it is possible to decide a movement different from a movement made by a mere shadow. By judging the presence/absence of the movement by this moving quantity arithmetic means, it is possible to recognize the movement of a person reliably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detecting apparatus which monitors a bathroom or the like and issues an alarm to another person at a remote place when an abnormality occurs in the movement of the human body.

[0002]

2. Description of the Related Art Conventionally, in this kind of human body detecting device,
A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like is provided, the detection output of the human body detection sensor is captured, and if the detection output is generated, it is determined that the movement of the human body has occurred in the bathroom. , It was moved to the next process.

[0003]

However, in the above-mentioned human body monitoring apparatus, since the movement of a person is detected by the detection output of the human body detection sensor by imaging, an object other than the person, for example, a movement of a cat or a window is detected. "Movement" due to shadows of trees and trees reflected from the room and changes in lighting in the bathroom
Therefore, there is a problem that the person proceeds to the next flow even though the person is not in the bathroom. When the movement stops after this "moving" is determined, the movement of the shadow stops when the movement of the shadow stops, for example, when the trees move by the wind, as in the case of the shadow of the trees. Erroneously judges that this stopped state was caused by a person falling down in the bathroom, and after a predetermined time, an alarm was issued outside the bathroom by a sound, etc. There was a problem that an alarm was issued and the subsequent processing became rather complicated. In addition, after a person actually enters the room, it is necessary to reliably detect the stopped state following the moving state. Furthermore, if an infrared sensor is provided in addition to the human body detection sensor and it is determined that movement has occurred due to both detection signals of the human body detection sensor and the infrared sensor, the detection area of the infrared sensor detects the human body detection sensor. If it is larger than the area, the infrared sensor first detects it in the bathroom before reaching the entrance of the bathroom.
Next, if the human body detection sensor detects the movement of a person's shadow, there is a problem that the movement of the human body is erroneously detected as occurring in the bathroom even though the person is not in the room.

In view of the above problems, it is an object of the present invention to provide a human body detection apparatus which makes it difficult to cause erroneous detection and eliminates the complexity of subsequent false alarms.

[0005]

In order to solve the above-mentioned problems, a human body detecting device of the present invention is a human body detecting sensor having an image pickup device for picking up an image of a bathroom or the like at predetermined time intervals, and the amount of movement of the human body is set to the predetermined amount. A motion amount calculating means for calculating the difference in the amount of received light by comparing both images before and after the time interval, and a threshold value for determining whether or not the detection value calculated by the motion amount calculating means falls within a preset setting range. Firstly, a motion presence / absence determining unit is provided to determine that the human body has moved only when the detected value exceeds the threshold value.
It is a feature of. According to this first feature, a predetermined threshold value is set in advance for the value of the movement amount when determining the movement, and the movement of the human body is performed only when the value detected by the movement amount calculation means exceeds the threshold value. It is decided to judge that there was. Here, the movement amount means a value obtained by comparing two actually captured images and calculating the difference in the amount of received light. By obtaining this threshold value in advance based on the movement of a person through experiments or the like, it is possible to make a judgment different from the movement caused by a mere shadow. Then, by determining whether or not there is movement by this movement amount calculation means, it can be surely recognized that the movement is that of a person.

Further, the human body detecting device of the present invention compares the amount of light received by comparing the human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at predetermined time intervals with the amount of light received by comparing both images before and after the predetermined time interval. A motion amount calculation means for calculating as a difference, and a motion presence / absence determination means for determining whether or not the detection value calculated by the motion amount calculation means falls within a preset setting range are provided. Only when the detected value exceeds the threshold value, it is determined that the human body has moved, and the threshold value for the determination by the motion presence / absence determining means is changed before the entry determination and after the entry determination. The second feature is that the threshold value changing means is provided. According to the second feature, in addition to the above feature, by providing a threshold value changing means for changing the determination threshold value before and after entering the room, the criterion for determining the presence / absence of movement before and after entering the room. Different from the above, it is possible to use a gentle judgment standard before entering the room and a strict judgment standard after entering the room, and it is possible to reduce the probability of false detection. Further, the human body detection device of the present invention,
A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at a predetermined time interval, a movement amount calculation means for calculating a movement amount of the human body as a difference in light receiving amount by comparing both images before and after the predetermined time interval, and the movement amount. A motion presence / absence determination means for determining whether or not the detection value calculated by the calculation means falls within a preset range is provided with a human body only when the detection value exceeds the threshold value. Is provided, and threshold value changing means for changing the threshold value of the determination by the motion presence / absence determining means to a lower value after entering the room than before entering the room is provided. This is the third feature. According to the third feature, in addition to the above feature, the threshold value for the determination by the motion presence / absence determining unit is changed to a lower value after the entry determination than before the entry determination.
Before entering the room, the presence / absence of movement can be slowed down, and, for example, it is possible to eliminate the detection of movement by a cat or shadow of a tree. Further, after entering the room, the presence / absence of movement can be sharply determined, and the stop of movement of a person can be detected with high sensitivity.

Further, the human body detecting device of the present invention compares a human body detecting sensor having an image pickup device for picking up an image of a bathroom or the like at a predetermined time interval, an infrared sensor, and both images of the amount of movement of the human body before and after the predetermined time interval. And a motion presence / absence determining unit that determines whether a detection value calculated by the motion amount calculating unit falls within a preset range using a threshold value. Is provided so that it is determined that the human body has moved only when the detected value exceeds the threshold value, and the output voltage detected by the infrared sensor falls within a preset range. An output voltage detection determination means for determining whether or not a threshold value is provided, and the threshold value for determination by the motion presence / absence determination means and the threshold value for determination by the output voltage detection determination means are compared with those before the entry determination. hand In that a threshold value changing means for changing the after chamber determination to a lower value is a fourth feature. According to the fourth feature, in addition to the features described above, not only the threshold value for determination by the motion presence / absence determining unit but also the threshold value for determination by the output voltage detection determining unit of the infrared sensor are both high before entering the room. By setting both to low values after entering the room, a double standard is obtained, and it is only when both standards are satisfied that the room can be judged to enter or exit. As a result, the probability of erroneous entry / exit determination can be significantly reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION 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 an embodiment of the present invention. FIG. 3 is a circuit diagram showing the configuration of an image core circuit that constitutes one pixel of the image detection unit of the human body detection sensor. FIG. 4 is an explanatory diagram showing the relationship between the imaging range of the sensor, the detection range, and the detection area. Figure 5
3 is a control flowchart showing an embodiment of the present invention. FIG. 6 is a flowchart of human body stoppage detection showing an embodiment of the present invention. FIG. 7 is an explanatory diagram of an embodiment showing the relationship between the human body detection sensor, the hot water equipment, and the remote controller.
FIG. 8 is a block diagram of electric control of another embodiment showing the relationship among the human body detection sensor, the hot water equipment, and the remote controller. FIG. 9 is an enlarged view of the storage unit showing an embodiment. (A) of FIG.
Is a diagram showing a current image and a previous image of an object moved to the lower right, (b) is a diagram showing the brightness of the previous image for each pixel, (c)
FIG. 4 is a diagram showing the brightness of the current image for each pixel. FIG. 11 is a diagram showing a difference image showing changes in brightness and darkness in pixels corresponding to image boundaries. FIG. 12 is an electric circuit block diagram showing one embodiment, and FIG. 13 is a flowchart of human body monitoring showing one embodiment. FIG. 14 is an electrical block diagram showing the relationship between the remote controller and the human body detection sensor. FIG. 15 is an electric circuit diagram showing the connection relationship between the remote controller, the hot water equipment, and the human body detection sensor according to another embodiment. FIG. 16 is an electrical block diagram showing the display relationship. FIG. 17 is a flow chart for making an entry / exit determination. 18 to 20 show output waveforms of the infrared sensor. FIG. 21 is an explanatory diagram showing the relationship between the imaging device, the infrared sensor, and the control device. 22 to 24 show detection output of the motion amount by the motion amount calculating means.

FIG. 1 shows an outline of an embodiment of the present invention, in which a bathtub 2 and a washroom 3 are provided inside a bathroom 1. Reference numeral 4 is an entrance to the bathroom 1. Reference numeral 5 denotes a human body sensor, which will be described in detail later, but is attached to the upper portion of the inner wall surface of the bathroom 1. Specifically, it is attached at an upper position of the bathroom wall surface facing the bathroom wall surface in contact with the longitudinal direction of the bathtub 2. To the hot water equipment 40, a bath remote control 60 installed in a bathroom and a kitchen remote control 70 installed in a kitchen for operating the hot water equipment 40 from a remote position are connected. Although the human body sensor 5 is attached to the wall surface of the bathroom 1 in this embodiment, the human body sensor 5 is not limited to this example and may be attached to the inner surface of the ceiling of the bathroom 1. The human body sensor 5 has an imaging device using an artificial retina, and is composed of a human body detection sensor 51 that images the movement of the human body in the bathroom 1 and performs image processing, and an infrared sensor 52 that detects the human body by heat detection by infrared rays. is doing. The image pickup device picks up an image of a monitoring area such as a bathroom at predetermined time intervals.

A bath remote controller 60 for remotely controlling the hot water equipment 40 is installed in the bathroom 1, and a kitchen remote controller 70 for remotely controlling the hot water equipment 40 is installed in the kitchen. Here, the hot water device 40 is a device for heating hot water and supplying it to a bathtub or the like, and specifically includes a bath kettle with a water heater, a heater with a water heater, a hot water heater, a water heater, and the like. ing. The hot water equipment may not only use gas as a fuel but may also use oil as a fuel. Regarding the connection of the warm water equipment 40, the remote controllers 60 and 70, and the human body detection sensor 51, in the one shown in FIG. 1 showing one embodiment of the present invention,
First, the hot water equipment 40 and the kitchen remote controller 70 are connected to the cable 41.
Then, the kitchen remote controller 70 and the bath remote controller 60 are connected by the cable 41, and the bath remote controller 60 and the human body detection sensor 51 are connected by the cable 41. Then, the remote controller 6 for controlling the water heater, etc.
0 and 70 have a display unit such as a liquid crystal display panel for notifying that there is a bather in the bathroom 1. When the human body sensor 5 detects the bather and outputs a detection signal, the display unit lights up. And so on. The display unit is not limited to the one described above, and when the bather does not move for a certain period of time, it is presumed that he or she is sleeping in the bathtub or has fallen down. If no response is received within the specified time, the kitchen remote control 7
At 0, the alarm sound or voice is used to notify the alarm to others such as family members.

The hot water equipment 40 has a built-in heat exchanger and burner, and is provided with various sensors for control. A hot water supply drop pipe 46 is connected from the hot water equipment 40 to the bathtub 2. Further, the power source for operating the human body sensor 5 is introduced from the power plug 47 of the water heating device 40, and the controller 42 of the water heating device 40.
It is supplied after being stepped down and lowered in voltage through a transformer (not shown).

FIG. 2 shows a specific structure of the human body sensor 5 which is composed of a human body detection sensor 51 using an artificial retina chip and an infrared sensor 52. Human body detection sensor 51
Is an image pickup device 6 for picking up an image of the monitoring area at predetermined time intervals,
The control device 7 is composed of a microcomputer that controls the imaging device 6 and processes and determines a captured image. In addition, the controller 7 and the remote controller 6 described above.
0 and 70 are transmitted and received by a communication unit 53 such as a communication IC described later. Further, in addition to the human body detection sensor 51, an infrared sensor 52 is provided in the same case body, and the control device 7 thereof is shared so as to mutually complement the monitoring when the bathroom 1 is dark.

The image pickup unit 8 of the image pickup device 6 has a vertical length of 128 ×
It is composed of an image detection unit 9 having a resolution of 128 pixels horizontally, an imaging lens 10, a scanner 11, a multiplexer 12, and a scanner drive control unit 13. The image detection unit 9 may use vertical 32 pixels × horizontal 32 pixels, or may perform image detection processing with a part of a large number of pixels. The pixels of the image detection unit 9 have 256 levels of monochrome “level 0 (black) to 2”, respectively.
It is represented by 256 gradations of 55 (white).

Then, in the image pickup section 8, the image in the bathroom is formed on the image detection section 9 by the image forming lens 10. The scanner 11 is drive-controlled by the 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 be sequentially in a light receiving state (ON state) at regular intervals. . The photocurrents simultaneously output from the pixels in one column in the light receiving state are combined into a single electric signal by the multiplexer 12 and amplified by the amplifier 14 before being output as an analog voltage. The converter of the control unit 7 is used to convert analog data into digital data.

Further, each pixel of the image detecting section 9 is composed of 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, and a sensitivity variable terminal 21.
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 (image brightness) in the image output unit 15, and if the image average value is out of the appropriate range, the amplifier 14 causes the image pickup device 6 to operate. In addition to adjusting the gain, the scanner drive control unit 13 adjusts the storage time of the image detection unit 9 to perform light control so that an image with appropriate brightness can be obtained. This dimming may be performed for each of the divided detection areas described later.

In the image pickup device 6 using the artificial retina, the image average value is the gradation (0 gradation (black) to 255 gradation (white) of 256 gradations) in all the pixels that constitute the image detecting section 9. It is an average value and is expressed by a value of 0 to 255. This image average value is determined by the gain of the amplifier 14 and the accumulation time of the image detector 9. Here, the gain corresponds to the aperture of the camera, and the accumulation time corresponds to the shutter speed of the camera. Therefore, in order to obtain an appropriate image average value of the image pickup device 6, it is only necessary to fix the gain to an appropriate value and adjust the accumulation time. Alternatively, an appropriate accumulation time may be fixed and the gain may be adjusted.

Then, in FIG. 2, at least an image detecting section 9 for performing image pickup, a scanner 11, and a scanner driving section 1
3 and the gain adjusting unit 16 are configured by one chip.
This chip is called an artificial retina chip. Further, a control device 7 is provided on the back surface of the chip, and the control device 7 is composed of a microcomputer incorporating various kinds of software.
The area dividing means 24 for dividing the detection area for performing the detection processing into a plurality of areas is incorporated as software.

Specifically, as shown in FIG. 4, the point table 25 for processing the image information input to the control device 7 is divided into a plurality of areas. That is, the imaging capability range (corresponding to the entire point table 25) that can be detected by the human body detection sensor 51 is defined as a detection area 26 that requires image processing and a non-detection area 27 that does not perform image processing.
It is divided into and. That is, the entire imaging capability range is not set as the detection area. As a result, a part of the detection processing area where detection processing can be performed is used as a sensor detection area for actually detecting and processing, thereby limiting the image processing range and accelerating the image processing speed. Further, as shown in FIG. 4, the detection area 26 is replaced with an entrance area 29 and a wash area 3
The area is divided into three areas of 0 and the bathtub area 31. The division of the detection area 26 is not limited to this example, and the detection area 26 may be divided into two areas, an entrance area 29 and an area other than the entrance area 29. For example, the washing area 30 and the bath area 31 may be combined into one area. In the case of a bathroom, the entrance area 29 is an area located inside the bathroom and near an entrance door to the bathroom. The washing area 30 mainly means an area of a floor portion where the head and body are washed, and the bath area 31 means an area where the bath is located. Image information is sequentially input to the control device 7 for each of the areas divided in this way, and processing such as detection and calculation is performed for each area.

The imaging lens 10, the image pickup device 6 and the control device 7 constituting the human body sensor 51 are housed together with the infrared sensor 52 in one case, and attached to a wall surface or the like as a human body sensor set. The mounting position may be such that the entire bathroom 1 including the entrance / exit 4 to the bathroom is included in the viewing angle.

Then, the detection output of the image pickup device 6 and the detection output of the infrared sensor 52 are input to the determination means 32, respectively. The determination unit 32 is configured to comprehensively determine the presence or absence of a bather in the bathroom, the movement of the bather, and the like based on the output from the image pickup device 6 and the output from the infrared sensor 52.

The image detected by the artificial retina is image-processed as follows. The control device 7 for controlling and processing the image,
The image information is received from all the pixels forming the image detection unit 9 at regular intervals, and when the image information is received at regular intervals, the image information is processed and the determination means 32 determines the movement of the bather. .

Next, an image processing method for extracting the movement of a person from the image captured by the artificial retina 21 will be described. Upon receiving the image information at predetermined time intervals, the control device 7 including 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.

Specifically, as shown in FIG. 10A, the image (bright image) P of a square object is changed 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. 10 (b) and the current image is represented by FIG. 10 (c). The images before and after this are temporarily stored by the image storage means 115 in FIG. The captured images are sequentially updated so that the latest two images are always stored. Then, the motion amount calculating means 111 compares the two images for each of the divided areas, and for each pixel (x, y) of each area, the previous image p
Received light amount Pp (x, y) of the current image n and received light amount Pn (x, y) of the current image n
The difference (motion amount) D (x, y) = Pn (x, y) -Pp (x, y) from y) is calculated, and the calculation result can be obtained as a difference image as shown in FIG. In the difference image of FIG. 11, a pixel having a positive difference D (x, y) is represented by a + symbol, a negative pixel is represented by a − symbol, and a pixel having a D (x, y) of zero is represented by a 0 symbol. There is. By capturing the sum of such differences,
Whether or not there is motion can be determined for each area, and this determination is performed by the motion presence / absence determining means 114. If there is no motion amount, it is determined that there is no motion, and if there is motion amount, it is determined that there is motion. The presence / absence of motion is determined by the amount of motion equal to or greater than a certain value corresponding to the motion of the human body. This determination method will be described with reference to FIGS.
Will be explained. The detection value of the motion amount calculated by the motion amount calculation means 111 is determined by the motion presence / absence determination means 114 using a threshold value. This threshold value is preset in two stages of a high setting value (C1) and a low setting value (C2). Then, only when the detection output of the movement amount exceeds the threshold value C1, it is determined that the human body is “moving” by the human body detection sensor (FIG. 22). Based on this judgment, the motion presence / absence judging means 114 outputs an ON signal. Therefore, when the detection output of the movement amount is between the high setting value (C1) and the low setting value (C2) as shown in FIG. 23, it is not determined that the human body has moved,
No signal is output. Further, as shown in FIG. 24, when the detection output of the movement amount is below the threshold value of the low set value (C2), it is determined by the human body detection sensor that there is “no movement” of the human body. An off signal is output according to the determination. The threshold value is set high when the human body detection sensor 51 is in the standby state, that is, in the state where the power is turned on and the human body detection sensor 51 can detect the movement of the human body. Further, after the entry judgment after the "moving" of the human body, the threshold value changing means 152 changes the threshold value to a low value.

On the other hand, the motion presence / absence detection unit 112 detects whether or not there is a motion in each of the divided regions described above. That is, the captured image captured by the imaging device 6 is read by the control device 7 at regular intervals in the order of the entrance area 29, the washing area 30, and the bathtub area 31, and by analyzing this image data, there is movement. The area is detected. This detection may be performed, for example, by detecting the area where the above-described amount of movement has occurred as a moving area. Alternatively, the change in voltage caused by the movement of a person may be detected, and the changed area may be determined as the moving area and the detected area may be detected. Then, whether or not the area in which the motion is occurring corresponds to the area specified in advance is determined by the specific area corresponding determination means 113. The specific area means the bath area 31 or the wash area 30, and is an area excluding the entrance area 29. Whether or not the moving area is the specific area depends on, for example, whether or not the signals match, or by sequentially searching other detection areas and determining that if there is no movement in the area other than the specific area, it corresponds to the specific area. There is. In such a search, the state is sequentially transited based on the presence / absence of a motion and the signal of the region having the motion, and the search is performed in the microcomputer.

Further, the human body detection sensor 51 is provided with a sensitivity adjustment circuit (not shown) for automatically adjusting the sensitivity,
The detection accuracy is increased by increasing the sensitivity when the bathroom is dark and decreasing the sensitivity when the bathroom is bright.

Next, determination of whether or not a person has entered the bathroom 1 will be described. In FIG. 5, when a person starts to enter the bathroom 1, first, the infrared sensor 52 in the standby state detects the human body and turns on (step S1). Next, when the human body detection sensor 51 detects the movement amount by the movement amount calculation means 111 (step S2), the movement presence / absence determination means 114 determines the presence / absence of movement of the person. Then, the output signal from the motion presence / absence determining unit 114 and the infrared sensor 5
When both the output signal of 2 and the output signal of 2 are turned on, the human body determining unit 118 determines that the human body has moved (step SA). In this determination of movement of the human body (step SA), since the human body detection by the human body detection sensor 51 requires time for imaging and calculation of the movement amount, or because the monitoring sensitivity is low when the bathroom 1 is dark,
An infrared sensor 52 is used together, and after the infrared sensor 52 detects a human body, the human body detection sensor 51 detects the amount of movement, thereby compensating for the weak points of the human body detection sensor 51 and ensuring the certainty of motion determination. Is. Further, when a person moves from the entrance area to the wash area, the specific area matching determination means 11
It is detected by 3 that a person is in the washroom (step S
3). It is determined that the person has entered the room by detecting the movement of the human body in the washroom by the specific area matching determination means 113 (step S4). That is, it is possible to confirm that the person has entered the bathroom reliably by this entry determination that follows the determination that the human body is moving.

Further, even when the user exits the bathroom 1, if the output signal of the infrared sensor 52 is turned off (NO in step S5), the human body detection sensor 51 does not detect the amount of movement. When the output signal from the motion presence / absence determining means is turned off (NO in step S6), it is determined that the user has exited the bathroom 1 (step S7). If the infrared sensor 52 alone remains stationary near the entrance, it may be erroneously determined to have exited. Therefore, it is possible to make a reliable exit determination by the non-detection of the human body by both sensors, and the weak point of this infrared sensor 52 may be This is complemented by the use of sensors.

Even if the human body detection sensor 51 does not detect a person in the washroom 3 (NO in step S3), it detects a person in the bathtub 2 (step S3).
8) If both the infrared sensor 52 and the human body detection sensor 51 detect a person (steps S9 and S10),
It is determined that the user has entered the room (step S4). In addition, after it is determined that the user has entered the room, a timer may be set so that the detection duration of the sensor corresponds to the average bathing time.

FIG. 21 shows an embodiment of the present invention, which is a human body detection sensor 51 and an infrared sensor 5.
2 shows a method of detecting the presence or absence of movement of a human body according to 2. The control device 7 determines whether the output voltage detected by the infrared sensor 52 falls within a preset setting range by using a threshold value to detect the output voltage detection determining means 150 and the infrared sensor 52 during detection. A threshold value changing means 151 for changing the threshold value is provided. Further, a motion presence / absence determining unit 114 for determining whether or not the detection value calculated by the above-described motion amount calculating unit falls within a preset setting range by using a threshold value, and a threshold value for the determination is a room entry determination. A threshold value changing means 152 is provided for changing before and after entering the room. FIG. 17 shows a detection flow, and when in the standby state (step S50), both determination means 15
The threshold values of 0 and 114 are set high (step S
51). Then, when the output voltage of the infrared sensor 52 exceeds the preset range (Yes in step S52), it is determined that there is movement of a person by the infrared sensor (step S53). Specifically, FIG.
As shown in, when the output voltage becomes equal to or higher than the threshold value A1 (or equal to or lower than A2), the ON signal is output. As a result, the detection area of the infrared sensor 52 is wider than the detection area of the human body detection sensor 51. For example, even when a person moves outside the detection area of the human body detection sensor 51 as shown in FIG. Is made dull compared to after entering the room, the infrared sensor 52 is not erroneously determined to be moving. When a person moves outside the detection area of the human body detection sensor, for example, it is judged that there is movement in the bathroom in front of the entrance of the bathroom, and the threshold should be set higher before entering the room. Now, there is no longer such a false detection. Further, in the present embodiment, when the detected value of the movement amount is equal to or larger than the predetermined threshold value (C1) (step S54), the movement presence / absence determining unit 114 determines that there is movement by the human body detection sensor 51. (Step S61). As a result, the heat-sensitive infrared sensor 52 does not detect only the movement of the shadow reflected on the floor of the bathroom, so that erroneous detection does not occur. Further, when a small animal such as a cat accidentally enters the bathroom, it is possible to make a determination different from that of a person because the amount of movement is different. That is, as shown in FIG. 23, the threshold value (C1) is designated in advance based on the amount of movement of a person, so that the threshold value C1 does not exceed in the movement of cats and dogs, and therefore erroneous detection is prevented. be able to. The threshold value may not be provided on the infrared sensor side, but may be provided only on the motion presence / absence determining unit 114. Then, the entry determination is performed based on the determination that there is movement of the infrared sensor 52 (step S53) and the determination that there is a movement amount in the specific area (step S5).
5). As a result, it can be reliably determined that a person has entered the bathroom. An output signal based on this determination may be displayed to indicate that the user is taking a bath. When the entry determination is made, the threshold value changing means 151, 11
4, the threshold value is changed from high to low (step S56). With this, specifically, as shown in FIG. 20, when the output voltage is between the threshold values B2 and B1, the OFF signal is output. When the output voltage per unit time of the infrared sensor 52 falls within the set range (Yes in step S57), the output signal is turned off by the determination by the output voltage detection determination means 15, and it is determined that there is no human movement by the infrared sensor. (Step S58). Furthermore, the detection output of the motion amount per unit time by the human body detection sensor 51 is a low threshold value (C
2) When the following is true (in the case of YES in step S59),
The motion presence / absence determining unit 114 outputs an off signal. In this way, after the entry determination, the determination threshold of the determination unit is set as a strict reference to make the determination of the presence or absence of the movement strict and improve the detection accuracy of the movement stop. When both the output signal of the infrared sensor 52 and the output signal of the human body detection sensor are turned off, it is considered that the movement of the human body has disappeared from the bathroom, and the exit determination is performed (step S).
60). As a result, the exit determination is not made only by turning off one of the output signals, and the exit determination is made by turning off both of them, so that the exit from the bathroom can be reliably determined. If the display of the moving image is stopped by this exit determination, the exit status can be grasped from outside the bathroom.

Next, a connection configuration of another embodiment between respective members such as a sensor and a remote controller which constitute the entire apparatus will be described with reference to FIG.
Will be explained. Bath remote control 60 and kitchen remote control 7
0 is connected to the controller 90 of the controller in the hot water equipment 40 by the cable 41 of the wired remote controller.

The human body detection sensor 51 is a cable 41.
Is connected to the bath remote controller 60. The bath remote controller 60 is provided with a connecting terminal 85 for connecting the cable 41, and power for operating the human body detection sensor 51 is supplied from the bath remote controller 60. The connection between the human body detection sensor 51 and the hot water equipment 40 or the remote controls 60, 70 is not limited to the above example, and as shown in FIG. 8, a kitchen remote controller connected to the hot water equipment 40 via the communication IC from the human body detection sensor 51. 7
You may connect from 0 through the bath remote controller 60. In addition, the kitchen remote controller 70 and the bath remote controller 60 are connected via the communication IC.
The hot water equipment 40 may be connected in this order. Alternatively, as shown in FIG. 15, the human body detection sensor 51 and the hot water device 40 may be directly connected via a communication IC, similarly to the connection between the bath remote controller 60 and the kitchen remote controller 70.

In FIG. 7, the control unit 90 includes a water heater control unit 91 for controlling the hot water equipment 40, and a speaker or the like provided on each of the remote controllers 60 and 70 which is operated by an abnormality detection signal from the human body detection sensor 51. Notification means 61, 71
Is provided with a notification operation unit 92 for operating the above, and a notification canceling unit 93 for canceling the notification by the notification means. The notification operation unit 92 and the notification canceling unit 93 may be provided on the sensor side or the remote controller side. This can reduce the control load on the hot water equipment side.

Further, the bath remote controller 60 has an intercom switch which is a notification canceling means 62 for canceling the notification, an operation switch 63 for operating the hot water equipment,
Display means 64 such as a liquid crystal display plate and a touch panel for displaying is provided. Further, the kitchen remote controller 70 is provided with an intercom switch which is a notification canceling means 72 for canceling the notification, an operating switch 73 for operating the hot water equipment, and a display means 74 for displaying. In addition, a notifying means 6 provided for each remote controller for notifying a voice.
It is recommended that 1 and 71 be composed of a speaker and a voice IC.

Further, when the notification canceling means 72 does not cancel the notification, a telephone calling section 100 for calling a specific telephone number for emergency contact may be provided in the control section 90.

FIG. 8 shows a human body detection sensor 51 and each remote controller 6
It is an example of a circuit diagram showing a communication connection relationship between the 0.70 and the hot water equipment 40, and this embodiment is connected using a communication IC. The human body detection sensor 51 includes, in addition to the above-described imaging device 6, a control device 7 and a communication unit 53 including a communication IC for communication.
Is provided. This communication unit 53 is an analog communication unit 55.
And the digital communication unit 56, and the analog communication unit 55 is, for example, ASK (amplitude shift keying).
It may be configured by a method. Further, the digital communication unit 56 may employ, for example, a QPSK (quadri phase shift keying) system or a digital high-speed modulation system such as M16QAM, GFSK, or BPSK.

In the bath remote controller 60, in addition to the operation switches described above, a display means 64, a bath remote controller controller 65,
Analog communication unit 6 similar to the above, which comprises a communication IC for communication
6. A digital communication unit 67 is provided. Further, the bath remote controller 60 has a speaker 61 and a voice IC 6 for notification.
8. A PCM codec 69 is provided. This PCM
The codec 69 encodes and decodes audio information and video information by a PCM (pulse code modulation) method such as ADPCM and DPCM.

Further, the intercom switch 62 of the bath remote control 60 is for pressing a call button to bring it into a call state with the speaker of the intercom provided in the kitchen remote control 70. It may also be used as a microphone switch. Then, when the intercom stops are detected, or when an alarm is issued by the notification means, the intercom can be used to talk between the bath and the kitchen without pressing the call button. An intercom operating means 120 is provided. The intercom operating means 120 is programmed in the microcomputer as software, and the microcomputer itself may be provided in the bath remote controller, or may be provided in the human body detection sensor 51 or the controller of the hot water equipment. . In FIG. 12, the human body detection sensor 5
1 is programmed in the microcomputer of the controller 7. The remote control case of the bath remote control 60 is provided with a connection terminal 85 for connecting the cable 41. The human body detection sensor is passed through the bath remote control 60 via the kitchen remote control 70 connected to the hot water equipment 40 by the cable 41. A power supply for operation is supplied to 51.

Further, the human body detection sensor 51 is provided with a data storage unit 54 including a voice storage unit and an image storage unit described later. In the kitchen remote controller 70, in addition to the operation switch 73 described above, a display unit 74, a kitchen remote controller 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 are provided. It is provided. Reference numeral 78 denotes a voice IC which is an IC for notifying the speaker 71 or the like. 79 is a PCM codec. Further, the intercom switch 62 of the kitchen remote controller 70 is in a call state with the speaker of the intercom provided in the bath remote controller 60 by pressing the call button. It may also be used as a microphone switch. Then, similarly to the above, when the stop of the movement of the human body is detected, or when the alarm by the notifying means is issued, the call between the bath and the kitchen is enabled and the intercom can be talked without pressing the call button. It is designed to work. The hot water equipment 40 is provided with the above-described control unit 90, hot water supply control unit 91, an analog communication unit 95 including a communication IC for communication, a transformer 96 for lowering the commercial power supply voltage, and the like.

The analog communication section 55 and the digital communication section 56 of the human body detection sensor 51 are connected to the bath remote controller 60.
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 bath remote controller 60, and the analog communication unit 76 and the digital communication unit 77 of the kitchen remote controller 70 connect the hot water device 40. It is connected to the analog communication unit 95. The cable 41 between these communication parts uses a power superposition type two-core cable,
The signal for the sensor and the control signal for the normal hot water supply control may be superimposed and transmitted.

FIG. 9 is an explanatory diagram showing the contents of the data storage section 54 provided in the human body detection sensor for operating the human body detection sensor and informing the notification means.

In FIG. 9, a voice storage unit 101 stores voice data for informing the voices to the above-mentioned remote control notifying means 61, 71, and is an EEPROM.
Etc. The voice storage unit 101 has at least an operation request notification voice storage unit 107 that stores voice data for notifying a bather of a request to move the body with a message “Please move”, and a bath. The alarm notification voice storage unit 108 stores voice data for issuing an alarm to another person when the movement of the person stops and a predetermined time elapses. . Further, the operation request notification voice storage section 107 and the notification means 61, 71 constitute an operation request notification means.

An image storage unit 102 stores image display data for displaying an image for human body detection on the display means 64, 74. This image storage unit 102
Is for displaying a function necessary for human body detection by an image. For example, an operation image storage unit 103 for storing image data for displaying a screen required for initial operation of human body detection on a display unit, a human body Image storage unit 104 for storing image data for displaying the state in which the movement of the display unit is stopped, and an image storage unit for notification for storing image data for displaying the state in which the notification unit is notified on the display unit. 105 and other storage unit 106 for storing data necessary for displaying other images. The other storage unit 106 stores image data for displaying a moving image to show that the human body is moving. The moving image is not an actual captured image of the human body but a pseudo image showing that the human body is moving, such as an image of a moving doll animation. We are trying to protect privacy by anthropomorphizing not only moving images but also still images.

Although the image storage unit 102 is provided on the human body detection sensor 51 side in this embodiment, the present invention is not limited to this example, and as shown in FIG. 16, the remote controller side, for example, the bath remote controller 60 of the bath remote controller 60. The microcomputer of 65 may be provided integrally or separately. Then, the bath remote controller control unit 65 calls the image data from the other storage unit 106 of the image storage unit 102 to display the image data on the display unit 6.
The motion image display means 133 for displaying at 4 and 74 is programmed. The motion image display means 133 is operated by a signal of motion amount detection by the motion amount calculation means 111.

Further, the bath remote controller control unit 65 is programmed with a stop image display means 134 for calling image data from the stop image storage unit 103 of the image storage unit 102 and displaying it on the display units 64 and 74. The display by the stop image display means 134 is canceled by the display canceling means. The releasing means is configured to be released in response to a detection signal obtained by detecting movement of a human body, for example. A moving image may be displayed at the same time as the release.

Further, the stop image display means 134 is adapted to be operated by a signal for judging the stop of the human body by the judging means 32. The bath remote controller control unit 65 is programmed with a switching unit 135 for canceling the display by the stationary image display unit 134 and operating the moving image display unit 133 to switch to a moving image. Switching means 135
Is specifically operated by a signal from the operation switch 129 of the remote controller.

When operating the human body detecting device,
By operating the operation switch of the remote controller in advance, an initial screen image required for the operation is called from the operation image storage unit 103 on the human body detection sensor 51 side and displayed on the display means 64 and 74,
Select a specific screen from that screen to start the operation. Two
From the first time, these may be stored and used. Simultaneously with the operation, a part of the voice data is called from the voice storage unit 101 on the human body detection sensor 51 side and is notified by voice by the notification means 61, 71 such as a speaker.

Next, when the entry determination is made as described above, as shown in FIG. 6, the human body stop detection flow is entered, and the image of the human body is picked up by the image pickup device 6 at a predetermined time interval as described above ( In step S11), the captured previous image and the current image after a predetermined time are temporarily stored in the control device 7 (step S12).

Next, the motion amount calculating means 111 programmed in the control device 7 calculates the difference (motion amount) between the light receiving amount of the previous image and the light receiving amount of the current image for each pixel in each area. (Step S13). By detecting the movement of the human body by the movement amount calculation, the image data is called from the image storage unit, and the movement image display unit 133 displays the display units 64 and 7.
A moving image is displayed in step 4 (step S21).
It may be displayed only when both the motion detection by the infrared sensor 52 and the motion detection by the motion amount calculation are performed. This moving image may be composed of, for example, an animation of moving a hand, a picture of moving a body up and down, left and right, and the like, and by using the display plates of the display means 64 and 74 as a matrix display unit, a matrix is displayed. By combining the light and darkness of each dot (white, black) to form a plurality of symbols, and by repeatedly displaying the plurality of symbols in a fixed order, the still image moves using the afterimage phenomenon. It is recommended to display in a pseudo manner like an image. On the other hand, the motion presence / absence detection unit 112 detects a region in which motion is occurring (step S1).
4).

Then, these pieces of information are sent to the judging means 32 of the control device 7. In the judging means 32, the specific area matching judging means 113 judges whether or not the area in which the motion is occurring corresponds to a previously specified area, that is, the bathtub area 31 or the washing area 30. Further, in parallel with the determining means 32, the motion presence / absence determining means 114 determines whether or not there is a motion.

When the area in which the motion is occurring corresponds to the bathtub area 31 or the wash area 30 (in the case of YES in step S15) and when it is determined that there is no motion (in the case of YES in step S16) ), It is assumed that the bather has fallen in the bathroom, and it is determined that the movement of the person has stopped (step S17). By this stop determination, the process moves to the alarm step.

If it is determined that there is movement in the bathtub or the washing area (NO in step S16), imaging, calculation and determination are repeated at predetermined time intervals and repeated as described above. Of. Further, step S15
In the case where the area where the motion is occurring is other than the bathtub or the wash area (in the case of NO in step S15) and it is determined that there is no motion thereafter (in the case of YES in step S18), the infrared rays are detected. On the assumption that the output signal of the sensor 52 is turned off (Yes in step S19), it is determined that the user has exited the bathroom (step S20). Further, when the area in which the movement is occurring is other than the bathtub or the washing area (in the case of No in step 15), and the movement continues after that (step S18).
When the answer is NO), it is considered that the activity is near the entrance of the bathroom, so continuous monitoring is performed. As described above, even when the vehicle stops at the entrance area, it is not determined that the vehicle has stopped, so that an alarm due to an erroneous determination is not generated.

Next, the human body monitoring flow shown in FIG. 13 will be described. When the stop determination is made as described above (step S30), the stop determination signal is output,
The moving image is stopped and the stopped image display means 13
4 operates, and an image showing the stopped state is displayed on the display means 64, 7.
4 is displayed (step S30). This stop image is
It is configured by using one still image that constitutes a part of the moving image described above. Alternatively, they may be separately created and configured. Sharing images simplifies image creation.

The control device 7 for the human body detection sensor 51
The timer means 117 provided in step S31 starts the stop count operation (step S31). The timer means 117 is started by a stop determination signal from the determination means 32 and counts a predetermined time. This predetermined time is divided into two steps, and the predetermined time of the first step is, for example, 90 seconds,
The predetermined time of the second stage following this is set to 30 seconds. The predetermined time is not limited to this example, and can be arbitrarily set other than this.

Then, the timer means 117 and the display means 6
In relation to Nos. 4 and 74, the timer means 117 uses the clock function of the microcomputer of the control means of the human body detection sensor 51 to count the time under normal conditions. This time display is displayed on the display means 64 of the bath remote controller 60 by the time display means 130 of the microcomputer of the bath remote controller 60 provided in the bath remote controller 60. Further, the microcomputer of the bath remote control unit 65 is provided with the timer means 117 after the stop determination.
After the set time has elapsed from the start of counting by the display means 6
Count display means 13 for displaying the count on 4
1 is provided. Specifically, the count display means 131 starts to display a number on the display means 64 after 60 seconds have elapsed after the stop determination, until the predetermined time of 90 seconds, which is the first step, has elapsed. During the period, that is, from the start of the display, the count status is displayed by numbers for 30 seconds. It is recommended that the count display be counted down from 30 every 1 second. Thereby, the bather can instantly grasp the remaining time until the later notification of the operation request. In addition, the microcomputer of the bath remote controller 65 has a display means 64.
There is provided a switching display means 132 for switching the time display from the time display to the count display.

In FIG. 13, when the set time elapses after the stop determination (Yes in step S40), the count display means 131 causes the display means 64,
A numerical value is displayed on 74 (step S41). Instead of numerical values, different pictorial diagrams may be displayed according to the passage of time. Although the count is started here, by delaying the display of the count only by the set time from the start of the count, which is the time when the stop is determined, the bather may feel anxiety that the count will start immediately after the stop. Can be wiped off.
Further, in response to an operation request described later, when the movement is started, the timer is released, the count display itself can be omitted, and the number of times of switching to the clock display can be reduced.

Further, when the motionless state continues for the first predetermined time (90 seconds) (step S33), a motion request signal is output from the human body detection sensor 51 side (step S33).
34), the bath remote controller 60 notifies the bather of the operation request (step S35). Regarding this notification procedure, the previously stored information corresponding to the stopped scene is read from the operation request notification voice storage unit 107 of the voice storage unit 101 side of the human body detection sensor 51 and the stopped image storage unit 104 of the image storage unit 102. Then, the data is transmitted via the analog communication unit 55 and the digital communication unit 56, and the remote control unit is notified by voice and displayed as an image.

More specifically, this notification may be made, for example, by voice information and a character image such as "There is no movement in the bathroom. Please move." This is to prevent the false alarm of the human body detection sensor by requesting the bather to move in the bathtub because the motion may stop if the user stays still in the bathtub. This notification is given after a while after it is soaked in the bathtub and does not move, that is, after the stop determination and after a predetermined time elapses. Therefore, the operation request is not made immediately after being immersed in the bathtub.

When the human body detection sensor 51 detects the movement of a person within the above predetermined time after the stop determination (step S3)
(No in 2), it can be assumed that the bather is alive and the timer is canceled (step S42). And at the same time,
In response to the detection signal obtained by detecting the movement of the human body, the display of the still image by the still image display means 134 is canceled (step S43). After being released, the moving image display means 133
Therefore, the moving image may be displayed again. This allows family members to know from a remote location that they have started moving after a stop.

Then, even after the operation request is notified (step S35), if the still stopped state continues for the second predetermined time (30 seconds) (Yes in steps S36 and 37), An abnormal state is determined, an abnormality detection signal is output from the determination unit 32, and the alarm notification voice storage unit 108 and the image storage unit 1 of the voice storage unit 101 are output.
Information stored in advance for notifying another person of an abnormal state is transmitted from the notification image storage unit 105 of No. 02 via the communication unit 53, and the notification units 61 and 71 of each remote controller are audibly alarmed and the display unit is displayed. Images are displayed on 64 and 74 (step S38).

The alarm (step S38) is specifically made by, for example, the voice information "Look at the bathroom" and the character image. As a result, the abnormality information of the human body detected by the human body detection sensor 51 can be simultaneously issued to the kitchen as well as the bathroom.

This alarm signal is transmitted as shown in FIG. 8 via the communication section composed of the communication IC. That is, the voice storage unit 101 and the image storage unit 10 provided in the human body detection sensor 51.
2, the voice and the image data are called according to the above-mentioned signals and transmitted to the kitchen remote controller 70 via the analog and digital communication units 66 and 76, and the notification means 71 and the display means such as a speaker provided in the kitchen remote controller 70. Notification and display at 74. Image detection and processing is performed in each of the areas 2 described above.
Since it is performed every 9, 30, and 31, the response speed for notification and display will be accelerated.

Since the intercom is already in a call-enabled state, a bather who does not move but can speak is as long as he or she can speak in an emergency in an abnormal state without pressing the call button. It is convenient to be able to contact the family outside the bathroom immediately.

When the human body detection sensor 51 detects the movement of a person within a predetermined time after the notification of the operation request (step S3)
(No in 6), the bather can be inferred to be in good health, and the timer is canceled similarly to the above (step S44). At the same time, in response to the detection signal from the detection of the movement of the human body, the display of the stop image by the stop image display means 134 is canceled (step S45). After the cancellation, the moving image may be displayed again. As a result, the state of the bathroom up to the alarm notification can be grasped from a remote place.

After the alarm is given, a family member rushes to the bathroom and rescues. The notification and the cancellation of the stop image display may be performed by, for example, turning off the operation switch 129 (step S39). After the operation switch is turned off, the motion amount may be displayed again by detecting the motion amount again.

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 range. Further, although the system bathroom has been described in the present embodiment, the present invention is not limited to this example, and the system bathroom can be installed in other existing bathrooms. Furthermore, the human body detection sensor is C
A CD camera may be used. Further, although the human body detection sensor and the notifying means are connected by wire, they may be connected by wireless.

[0067]

As described above, according to the present invention, a predetermined threshold value is set in advance for the value of the motion amount when determining the motion, and only when the value detected by the motion amount calculating means exceeds the threshold value. By determining that there is a movement of the human body, it is possible to make a determination different from the movement caused by a simple shadow or the like, and it is possible to reliably recognize that the movement is a human movement. Further, according to the present invention, by providing a threshold value changing means for changing the determination threshold value before and after entering the room, the determination criteria for the presence / absence of movement are different before and after entering the room, and before entering the room, there is a gradual change. Strict criteria can be used after entering the room, and the probability of false detection can be reduced. Further, the present invention, by changing the threshold value of the determination by the motion presence determination means to a lower value after entering the room than before entering the room, it is possible to make the determination of the presence or absence of motion before entering the room dull, for example, when a cat moves or It becomes possible to eliminate the detection of the motion due to the shadow of the tree. Further, after entering the room, the presence / absence of movement can be sharply determined, and the stop of movement of a person can be detected with high sensitivity. Further, according to the present invention, not only the threshold value for determination by the motion presence / absence determination means but also the threshold value for determination by the output voltage detection determination means of the infrared sensor are both high before the entry determination and low after the entry determination. Thereby, a double standard is obtained, and the entrance / exit is judged only when both the criteria are satisfied, and the probability of erroneous judgment of entrance / exit can be greatly reduced.

[Brief description of 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 an embodiment of the present invention.

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

FIG. 4 is an explanatory diagram showing a relationship between an image pickup range of a sensor, a detection range, and a detection region.

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

FIG. 6 is a flowchart showing a flow of human body monitoring of the present invention.

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

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

FIG. 9 is a block diagram showing an outline of a storage unit.

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 brightness and darkness of the previous image for each pixel, and FIG. It is a figure which shows the brightness of an image for every pixel.

FIG. 11 is a diagram showing a difference image showing a change in lightness and darkness in a pixel corresponding to an image boundary.

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

FIG. 13 is a flowchart of human body monitoring showing an embodiment.

FIG. 14 is an electrical block diagram showing another embodiment.

FIG. 15 is an electric block diagram showing another embodiment of the present invention.

FIG. 16 is an electrical block diagram showing an embodiment of the present invention.

FIG. 17 is a detection flowchart of the infrared sensor according to the embodiment.

FIG. 18 is an output waveform diagram of the infrared sensor.

FIG. 19 is an output waveform diagram of the infrared sensor.

FIG. 20 is an output waveform diagram of the infrared sensor.

FIG. 21 is an electrical block diagram showing an embodiment of the present invention.

FIG. 22 is a waveform chart of the detection output of the motion amount of the human body detection sensor.

FIG. 23 is a waveform diagram of the detection output of the motion amount of the human body detection sensor.

FIG. 24 is a waveform diagram of the detection output of the motion amount of the human body detection sensor.

[Explanation of symbols]

1 bathroom 2 bathtubs 3 washroom 4 doorways 5 human body sensor 6 Imaging device 7 Control device 9 Image detector 15 Image output section 17 Image core circuit 24 area dividing means 26 Detection area 29 Entrance area 30 washroom area 31 Bath area 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 Department 56 Digital Communications Department 60 bath remote control 61 Notification means 62 Release means 66 Analog communication unit 67 Digital Communications Department 70 kitchen remote control 71 Notification means 76 Analog communication unit 77 Digital Communications Department 85 terminals 90 Control unit 100 telephone call department 101 voice memory 102 image storage unit 103 Operation image storage unit 104 still image storage unit 105 Notification image storage unit 106 Other storage section 107 operation request notification voice storage unit 108 Alarm notification voice storage unit 111 Motion amount calculation means 112 Motion Presence / Absence Area Detection Means 113 Specific Area Applicability Determination Means 114 motion presence / absence determining means 115 image storage means 116 Entrance area applicable determination means 117 timer means 118 Human Body Judgment Means 120 Intercom operation means 130 time display means 131 count display means 132 switching display means 133 motion image display means 134 Stop image display means 135 switching means 150 Output voltage detection determination means 151 Threshold change means 152 threshold value changing means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G08B 25/04 G01V 9/04 S (72) Inventor Yoshiyuki Fujii 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Stock Company's Noritsu F-term (reference) 2D032 GA00 5C086 AA22 BA04 CA12 CA28 CB16 CB36 DA01 DA08 DA33 5C087 AA02 AA03 AA10 AA25 AA37 AA44 BB03 BB65 DD03 DD24 EE05 EE06 EE08 EE18 GG02 GG66 GG31 GG36

Claims (4)

[Claims] 1. A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at a predetermined time interval, and a movement amount calculation means for calculating a movement amount of the human body as a difference in light receiving amount by comparing both images before and after the predetermined time interval. And a motion presence / absence determining means for determining whether or not the detection value calculated by the movement amount calculating means falls within a preset setting range by using a threshold value, and the detection value determines the threshold value. A human body detection device, characterized in that it is determined that the human body has moved only when it exceeds. 2. A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at predetermined time intervals, and a movement amount calculation means for calculating the amount of movement of the human body as a difference in light receiving amount by comparing both images before and after the predetermined time interval. And a motion presence / absence determining means for determining whether or not the detection value calculated by the movement amount calculating means falls within a preset setting range by using a threshold value, and the detection value determines the threshold value. Only when it exceeds, it is determined that there is a movement of the human body, and threshold value changing means for changing the threshold value of the judgment by the movement presence / absence judging means before and after entering the room is provided. A human body detection device characterized by the above. 3. A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at a predetermined time interval, and a movement amount calculation means for calculating a movement amount of the human body as a difference in light receiving amount by comparing both images before and after the predetermined time interval. And a motion presence / absence determining means for determining whether or not the detection value calculated by the movement amount calculating means falls within a preset setting range by using a threshold value, and the detection value determines the threshold value. A threshold value for determining that there has been movement of the human body only when it exceeds the threshold value, and changing the threshold value of the determination by the motion presence / absence determination means to a lower value after entering the room than before entering the room A human body detection device comprising a changing means. 4. A human body detection sensor having an image pickup device for picking up an image of a bathroom or the like at predetermined time intervals, an infrared sensor, and the amount of movement of the human body is calculated as a difference in the amount of received light by comparing both images before and after the predetermined time interval. A motion amount calculation unit and a motion presence / absence determination unit that determines whether or not the detection value calculated by the motion amount calculation unit falls within a preset range, are provided. It is determined that the human body has moved only when the threshold value is exceeded, and the threshold value is used to determine whether the output voltage detected by the infrared sensor falls within a preset range. An output voltage detection determination means is provided to determine the threshold value of the determination by the motion presence determination means and the determination threshold value of the output voltage detection determination means to a lower value after the entry determination than before the entry determination. Change A human body detection device comprising a threshold value changing means.