WO2018030017A1

WO2018030017A1 - Moving body detection unit and care support system

Info

Publication number: WO2018030017A1
Application number: PCT/JP2017/023637
Authority: WO
Inventors: 楠田　将之
Original assignee: コニカミノルタ株式会社
Priority date: 2016-08-09
Filing date: 2017-06-27
Publication date: 2018-02-15
Also published as: JP6984601B2; JPWO2018030017A1

Abstract

A moving body detection unit is installed in a ceiling portion of a living space, and detects information about a subject as a moving body in the living space. The moving body detection unit is provided with an optical detection section that photographs the interior of the living space to acquire an image, a state detection section that detects the state of the subject by emitting and receiving radio waves, and a unit control section that controls the emission frequency of radio waves emitted from the state detection section. The unit control section switches control of the emission frequency on the basis of the image acquired by the optical detection section (S1 to S5).

Description

Motion detection unit and care support system

The present invention relates to a moving body detection unit that is installed on a ceiling portion of a living room and detects information on a subject as a moving body in the living room, and a care support system including the moving body detection unit.

2. Description of the Related Art Conventionally, a detection device for detecting various behaviors of a monitored person such as an elderly person (hereinafter referred to as “subject” in the sense of a detection target) has been proposed in a care facility. For example, in the detection apparatus of Patent Document 1, the imaging range of an imaging camera that images the floor surface from the ceiling of the subject's room is separated and identified into a plurality of areas (for example, a bed area and a floor area). When the detection area determination unit detects the presence and operation of the subject and detects that the subject is in a predetermined state in the predetermined area or over the predetermined area and its adjacent area, the determination processing section A notification to that effect is sent to the supervisor. As a result, the supervisor can cope with various behavior patterns of the subject. For example, when a long-time stationary state of the subject on the floor is detected and a notification to that effect is given to the supervisor, the supervisor falls on the subject's floor or falls from the bed. Can be dealt with.

JP 2001-307246 A (refer to claims 1 and 6, paragraphs [0001], [0030] to [0033], FIG. 1 and the like)

Incidentally, FIG. 13A schematically shows a state where the subject Q stands at a position far away on the floor surface 500b from the camera 501 installed in the ceiling 500a of the living room 500, and FIG. An image taken by the camera 501 at that time is shown. FIG. 14A schematically shows a state where the subject Q is falling at a position close to the floor surface 500b from the camera 501 installed in the ceiling portion 500a of the living room 500 (for example, directly below the camera 501). FIG. 14B shows an image taken by the camera 501 at that time. In a system in which the camera 501 is installed on the ceiling 500a and the interior of the living room 500 is monitored, the camera 501 captures the interior of the living room 500 at a wide angle. Therefore, as can be seen by comparing FIG. 13B and FIG. 14B, the subject Q standing at a position far from the camera 501 and the subject Q falling at a position near the camera 501 fall. They look the same on the image, making it difficult to distinguish them by image recognition.

Therefore, as in Patent Document 1, in a configuration in which a subject's fall is detected based on a two-dimensional image and elapsed time from a ceiling-mounted camera, for example, the subject is located far away from the camera in the room. Even when standing and standing still, if the state continues for a long time, it may happen that it is erroneously detected as “falling”, and it is impossible to accurately detect the falling of the subject.

In recent years, a state detection unit that detects the respiratory state of a subject by emitting and receiving radio waves for the purpose of managing the biological information (respiratory state, etc.) of the subject in a nursing facility or a hospital. Devices equipped with (Doppler sensors) are being used. If such a state detection unit can be used to accurately detect the fall of the subject in the room, there is no need to provide a separate sensor dedicated to fall detection, and the subject can be configured with a simple configuration of the apparatus. It is desirable because it can detect the fall of

The present invention has been made to solve the above-described problems, and its object is to provide a moving object detection unit capable of accurately detecting a fall of a subject in a living room with a simple configuration, and its To provide a care support system including a motion detection unit.

A moving object detection unit according to an aspect of the present invention is a moving object detection unit that is installed on a ceiling portion of a living room and detects information on a subject as a moving object in the living room, and acquires an image by photographing the living room. An optical detection unit, a state detection unit that detects the state of the subject by radiation and reception of radio waves, and a unit control unit that controls a radiation frequency of radio waves radiated from the state detection unit, A control part switches control of the said radiation frequency based on the said image acquired in the said optical detection part.

A care support system according to another aspect of the present invention includes the above-described moving body detection unit and a management server that receives and manages information transmitted from the moving body detection unit.

According to the above configuration, it is possible to accurately detect (determine) whether or not the subject has fallen with a simple configuration regardless of the position of the subject in the room.

It is explanatory drawing which shows the structure of the outline of the care support system which concerns on one Embodiment of this invention. It is explanatory drawing which shows typically the mode in the living room where the moving body detection unit of the said care support system was installed. It is a block diagram which shows the schematic structure of the said moving body detection unit. It is a block diagram which shows the detailed structure of the optical detection part which the said moving body detection unit has. It is explanatory drawing which shows typically an example of the image acquired by imaging | photography with the said optical detection part. It is explanatory drawing which shows typically the imaging | photography range of the said optical detection part, and the respiration detection range of an electromagnetic wave detection part. It is explanatory drawing which shows typically the waveform of the frequency of a 1st drive mode. It is explanatory drawing which shows typically the waveform of the frequency of a 2nd drive mode. It is explanatory drawing which shows an example of the transmission wave in the said 2nd drive mode, and a reflected wave. It is a flowchart which shows the flow of operation | movement in the said moving body detection unit. It is explanatory drawing which shows typically the state where a cared person is on the bed. It is explanatory drawing which shows typically the state where a cared person is not on the bed. It is explanatory drawing which shows typically the state in which the subject is standing in the position far away on the floor surface from the camera installed in the ceiling part of the living room. It is explanatory drawing which shows the image which image | photographed the subject with the said camera. It is explanatory drawing which shows typically the state in which the subject has fallen in the position near on the floor surface from the said camera. It is explanatory drawing which shows the image which image | photographed the subject with the said camera.

An embodiment of the present invention will be described below with reference to the drawings. In this specification, when the numerical range is expressed as A to B, the numerical value range includes the values of the lower limit A and the upper limit B.

[Care Support System]
FIG. 1 is an explanatory diagram showing a schematic configuration of a care support system 1 of the present embodiment. The care support system 1 is a system for supporting the daily life of a cared person living in a care facility or a patient admitted to a hospital (nurse), and is also referred to as a monitoring system. . The cared person and the cared person are objects to be supported by the care support system 1, that is, a target person (subject) managed by recognition or detection in the image recognition system 20 or the radio wave detection unit 30 described later. . Here, as an example, a case where the care support system 1 is constructed in a care facility will be described.

In the nursing facility, a staff station 100 and a living room 101 are provided. The staff station 100 is a so-called stuffing station for caregivers who support the lives of the care recipients who spend at the care facilities. The staff station 100 is provided with a management server 100a and a display unit 100b. The management server 100a is a terminal device that is communicably connected to a later-described moving object detection unit 10 installed in the living room 101 via the communication line 200, and includes a central processing unit (CPU; Central Processing Unit). Composed. The communication line 200 is configured by, for example, a wired LAN (Local Area Network), but may be a wireless LAN.

The management server 100a receives various types of information (for example, a captured image in the living room 101 and biological information of the care recipient (for example, information indicating a breathing state)) transmitted from the moving object detection unit 10 via the communication line 200. And the received information is displayed on the display unit 100b. Thereby, the caregiver of the care facility can grasp the health status of the care recipient by looking at the information displayed on the display unit 100b. The display unit 100b can be configured by a display of a personal computer, for example. In addition, when it is recognized that the care receiver's operation is abnormal, such as the care receiver falls down on the floor surface, by the image recognition process in the image recognition system 20 described later, the management server 100a displays the moving object detection unit. 10 is transmitted to the mobile terminal owned by the caregiver and the data of the captured image in the living room 101 acquired by the optical detection unit 23 of the moving object detection unit 10 is received. It is also possible to inform the caregiver. Note that, when image data is transmitted from the moving body detection unit 10 to the management server 100a and when image data is transmitted from the management server 100a to the portable terminal, the capacity, size, resolution, and the like of the image are appropriately adjusted.

At least one living room 101 is provided in a care facility, and FIG. 1 shows a case where two living rooms 101 are provided as an example. In the living room 101, one bed 102 used by the care recipient is installed. In addition, when two or more care recipients move in one living room 101, a plurality of beds 102 corresponding to each of the care recipients are installed.

FIG. 2 is an explanatory diagram schematically showing the inside of the living room 101 in which the moving object detection unit 10 is installed. As shown in FIGS. 1 and 2, the moving body detection unit 10 is installed on the ceiling portion 101 a of each living room 101 and is communicably connected to a communication line 200. When the living room 101 is a multi-bed room in which a plurality of beds 102 are installed, one moving body detection unit 10 is installed for one bed 102.

[Motion detection unit]
Next, the details of the moving object detection unit 10 will be described. FIG. 3 is a block diagram showing a schematic configuration of the moving object detection unit 10. The moving body detection unit 10 is a unit that detects information of a cared person (subject) as a moving body in the living room 101, and includes an image recognition system 20, a radio wave detection unit 30, and a unit control unit 40. Details of the image recognition system 20 will be described later. Since the moving body detection unit 10 includes various sensors such as the above-described radio wave detection unit 30 and an optical detection unit 23 described later, it is also called a sensor box.

The radio wave detection unit 30 is a sensor (state detection unit) that detects the state of the cared person in the living room 101 by radiating and receiving radio waves. In the present embodiment, the radio wave detection unit 30 is configured by a microwave Doppler sensor for individually detecting biological information of a cared person by radiating and receiving radio waves. The radio wave detection unit 30 includes a radiation unit and a reception unit (not shown). For example, microwaves in a 24 GHz band are radiated toward the bed in each room, and reflected waves that are reflected by the care recipient and are Doppler shifted. Receive. Thereby, the radio wave detection unit 30 can detect the care receiver's breathing state, sleep state, heart rate, and the like as biological information from the received reflected waves.

In addition, when the cared person is breathing (including during sleep), minute movements of the body due to the cared person's breathing (micromotion) occur. For this reason, detecting the care recipient's breathing state and sleep state is the same as detecting the care receiver's micromotion. From this, it can also be said that the radio wave detection unit 30 functions as a microscopic motion detection unit that detects microscopic motion of a care recipient (subject).

The unit control unit 40 controls the operations of the image recognition system 20 and the radio wave detection unit 30, and performs image processing and signal processing on information obtained from the image recognition system 20 and the radio wave detection unit 30, and results obtained Is a control board that outputs to the management server 100a as information on the status of the care recipient. The unit control unit 40 controls the radiation frequency of the radio wave radiated from the radio wave detection unit 30, and details of this point will be described later.

The unit control unit 40 includes a main control unit 41, an information processing unit 42, an interface unit 43, a storage unit 24, and an image recognition unit 25. The storage unit 24 and the image recognition unit 25 are provided in the unit control unit 40 here, but may be provided independently of the unit control unit 40. Details of the storage unit 24 and the image recognition unit 25 will be described later.

The main control unit 41 is composed of a CPU that controls the operation of each unit in the moving object detection unit 10. The information processing unit 42 and the image recognition unit 25 may be configured by the above-described CPU (may be integrated with the main control unit 41), or may be another arithmetic unit or a circuit that performs a specific process. It may be configured.

The information processing unit 42 performs predetermined processing on information (for example, image data) output from the optical detection unit 23 (to be described later) of the image recognition system 20 and information (for example, data on the respiratory state) output from the radio wave detection unit 30. Signal processing based on the algorithm is performed. Information obtained by the signal processing is used for image recognition in the image recognition system 20 (particularly, the image recognition unit 25).

The network cable (not shown) of the communication line 200 is electrically connected to the interface unit 43. Information relating to the status of the cared person detected by the moving object detection unit 10 based on images and microwaves is transmitted to the management server 100a via the interface unit 43 and the communication line 200.

Next, details of the image recognition system 20 will be described. The image recognition system 20 includes an illumination unit 21, an illumination control unit 22, and an optical detection unit 23.

The illumination unit 21 includes an LED (LightＬＥＤEmitting Diode) that emits infrared light (for example, near-infrared light) to enable photographing in the dark, and is provided at the center of the ceiling 101a of the living room 101. Located to illuminate the interior of the living room 101. For example, the illumination unit 21 has a plurality of LEDs and illuminates a floor surface 101b (see FIG. 2) in the living room 101 and a wall connecting the ceiling portion 101a and the floor surface 101b. The illumination control unit 22 controls illumination (infrared light emission) by the illumination unit 21.

The optical detection unit 23 is an imaging unit that captures an image of the interior of the living room 101 under the illumination of the illumination unit 21 and is configured by a camera, for example. FIG. 4 is a block diagram illustrating a detailed configuration of the optical detection unit 23, and FIG. 5 schematically illustrates an example of an image acquired by photographing with the optical detection unit 23. The optical detection unit 23 is disposed adjacent to the illumination unit 21 in the central portion of the ceiling 101a of the living room 101, and acquires an image of an immediately above viewpoint with a viewing direction directly below by photographing. The optical detection unit 23 includes a lens 51, an image sensor 52, an AD (analog / digital) conversion unit 53, an image processing unit 54, and a control calculation unit 55.

The lens 51 is, for example, a fixed focus lens, and is configured by a general super wide angle lens or fisheye lens. As the super wide angle lens, a lens having a diagonal angle of view of 150 ° or more can be used. As a result, as shown in FIG. 5, the entire living room 101 can be photographed from the ceiling 101 a toward the floor surface 101 b, and the cared person in the living room 101 and the entire room can be photographed without blind spots. It becomes possible.

The imaging element 52 is configured by an image sensor such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Metal Oxide Semiconductor). The image sensor 52 is configured by removing the IR cut filter so that the state of the cared person can be detected as an image even in a dark environment. An output signal from the image sensor 52 is input to the AD conversion unit 53.

The AD conversion unit 53 receives an analog image signal of an image captured by the image sensor 52 and converts the analog image signal into a digital image signal. The digital image signal output from the AD conversion unit 53 is input to the image processing unit 54.

The image processing unit 54 receives the digital image signal output from the AD conversion unit 53 and executes image processing such as black correction, noise correction, color interpolation, and white balance on the digital image signal. . A signal after image processing output from the image processing unit 54 is input to the image recognition unit 25.

The control calculation unit 55 executes calculations such as AE (Automatic Exposure) related to the control of the image sensor 52 and controls the image sensor 52 such as exposure time and gain. Moreover, the control calculating part 55 performs control while performing calculations, such as a suitable light quantity setting and light distribution setting, with respect to the illumination part 21, as needed. The control calculation unit 55 may have the function of the illumination control unit 22 described above.

The image recognition system 20 described above further includes the storage unit 24 and the image recognition unit 25 described above.

The storage unit 24 is a memory that stores a control program executed by the unit control unit 40 and various types of information, and includes, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a nonvolatile memory, and the like.

Moreover, in this embodiment, the memory | storage part 24 has memorize | stored beforehand the positional information on the sleeping area R (refer FIG. 6) in the living room 101. FIG. The sleeping region R is a region that is used by the care recipient in the living room 101 when sleeping, and more specifically, is a region in which the bed 102 is arranged in the living room 101. In the living room 101, a futon may be arranged instead of the bed 102. In this case, the area where the futon is arranged in the living room 101 is the sleeping area R. As the position information of the sleeping region R, for example, the position coordinates (planar coordinates) of the sleeping region R when an arbitrary position in the living room 101 is set as the origin in a plane parallel to the floor surface 101b can be considered. The position information of the sleeping region R may be set and input by the management server 100a, transmitted from the management server 100a to the moving object detection unit 10, and stored in the storage unit 24.

The image recognition unit 25 performs image recognition processing on the image data of the image acquired by the optical detection unit 23. More specifically, the image recognition unit 25 receives a signal after the image processing unit 54 of the optical detection unit 23 performs image processing, extracts the contour of the object, for example, and shapes it by a method such as pattern matching. An image recognition process for recognizing the image is executed. Thereby, the image recognition part 25 can recognize the state of the cared person in the living room 101.

Here, the state of the cared person in the living room 101 is assumed to be rising, getting out of bed, entering the floor, falling over, and the like. These cared person states are distinguished from minute movements (small movements of the body due to breathing, etc.) detected by the radio wave detection unit 30 in that they involve the size movements (body movements) of the cared person's body. Is done.

FIG. 6 schematically shows the imaging range of the optical detection unit 23 and the respiration detection range of the radio wave detection unit 30 when the moving object detection unit 10 is installed in the ceiling 101a of the living room 101 different from FIG. ing. In the area other than the bed 102 (sleeping area R) in the living room 101, it is necessary to detect the fall of the care recipient. At this time, in the fall detection based on the photographed image of the optical detector 23 installed on the ceiling, the fall cannot be accurately detected when the cared person is far from the moving object detection unit 10 in the living room 101 as described above. is there. For this reason, in this embodiment, when the care receiver is in an area other than the bed 102 in the living room 101, that is, when the care receiver is to be detected to fall, the unit controller 40 detects the radio wave detection section. By switching the control of the radiation frequency with respect to 30, the presence or absence of the cared person's fall is detected (determined). The details will be described below.

[Control of the unit controller]
The unit controller 40 (particularly the main controller 41) controls the radiation frequency of the radio waves radiated from the radio wave detector 30. As the control of the radiation frequency, there are a control by the first drive mode and a control by the second drive mode.

FIG. 7 schematically shows the frequency waveform of the first drive mode, and FIG. 8 schematically shows the frequency waveform of the second drive mode. The first drive mode is a mode in which the radio wave detection unit 30 is driven without modulation (without modulation) of the radiation frequency of the radio wave radiated from the radio wave detection unit 30. Both the CW (Continuous Wave) mode and the Doppler mode are used. be called. In the drive in the first drive mode, the sensor sensitivity is high and the radio wave detection unit 30 can detect the care recipient's breathing. However, since the distance to the care receiver cannot be measured, the fall detection based on the distance is possible. Can not do.

On the other hand, the second drive mode is a mode for driving the radio wave detection unit 30 by modulating the radiation frequency, and is also called FMCW (Frequency-Modulated-Continuous-Wave) mode or distance measurement mode. In the driving in the second driving mode, since the distance between the radio wave detection unit 30 and the cared person can be measured, the fall of the cared person can be detected based on the measured distance, but on the other hand, the sensor Since the sensitivity is low, the radio wave detection unit 30 cannot detect respiration.

Here, for example, as shown in FIG. 9, when the frequency is changed linearly, the distance D (m) between the radio wave detection unit 30 and the cared person is the frequency difference (beats) between the transmitted wave and the reflected wave. Frequency) and the like. Specifically, the distance D is obtained by the following equation.
D = (c · T · fB) / (2 · fw)
However,
c: speed of light (= 3 × 10 ⁸ ) (m / s)
T: Transmission time (s)
fB: Beat frequency (= frequency of transmitted wave−frequency of reflected wave) (Hz)
fw: frequency sweep width (Hz)

When the distance D is obtained, the unit control unit 40 can determine whether the care receiver is standing or falling based on the magnitude of the distance D. For example, the height from the floor surface 101b of the living room 101 to the ceiling portion 101a is 2.4 m, the height of the care recipient is 1.65 m, and image recognition based on the image photographed by the optical detection unit 23 is performed. In the case where it is known that the cared person is directly below the moving object detection unit 10, when the distance D obtained by the above formula is 0.70 to 0.80 m, the cared person is It can be determined that the person is standing right below, and if the calculated distance D is 2.2 to 2.3 m, the care recipient can be determined to be in a state of falling right below the moving object detection unit 10. . Similarly, even when the cared person is located away from the moving object detection unit 10, when the cared person is standing, the distance between the moving object detection unit 10 and the cared person (for example, the head) is relatively Since the distance D is relatively large when the cared person is falling, the presence or absence of the cared person can be determined based on the magnitude of the distance D.

In the present embodiment, the unit control unit 40 (particularly the main control unit 41) controls the radiation frequency in the first drive mode and the second drive mode based on the image acquired by the optical detection unit 23. I try to switch. Hereinafter, the entire operation of the moving object detection unit 10 including such control will be described.

FIG. 10 is a flowchart showing an operation flow in the moving object detection unit 10 of the present embodiment. FIG. 11 schematically shows a state where the cared person P is on the bed 102, and FIG. 12 schematically shows a state where the cared person P is not on the bed 102 (a state where the cared person P is separated from the bed 102). It shows. First, the optical detection unit 23 captures an image of the interior of the living room 101 from the ceiling 101a toward the floor 101b (S1). Next, the image recognition unit 25 performs image recognition processing on the image data of the image, and recognizes the position of the care recipient P in the living room 101 (S2). Then, the unit control unit 40 determines the positional relationship between the care receiver P and the bed 102 (sleeping region R) on the image, and determines whether or not the care receiver P is on the bed 102 ( S3).

Note that the storage unit 24 stores position information (position coordinates) of the bed 102 in the real space, but the position of the object that actually exists in the living room 101 and the object in the image obtained by photographing the inside of the living room 101. Therefore, the unit control unit 40 determines the position of the bed 102 on the image (the position corresponding to the position information on the image) from the position information stored in the storage unit 24. Can be grasped.

When it is determined in S3 that the cared person P is on the bed 102 (see FIG. 11), the unit control unit 40 drives the radio wave detection unit 30 in the first drive mode in which the radiation frequency is not modulated (see FIG. 11). S4). Thereby, the radio wave detection unit 30 can detect the biological information (for example, the breathing state) of the cared person P on the bed 102.

On the other hand, when it is determined in S3 that the care receiver P is not on the bed 102 (see FIG. 12), the unit control unit 40 drives the radio wave detection unit 30 in the second drive mode that modulates the radiation frequency. (S5). Thereby, the radio wave detection unit 30 can measure the distance to the cared person P, and the unit control unit 40 determines whether the cared person P has fallen as described above based on the measured distance. It becomes possible to judge.

In the flowchart of FIG. 10, the process from S1 to S4 or S5 is shown only once. However, after S4 or S5, the process returns to S1 and the subsequent processes are repeated, so that respiration detection or fall detection is always performed. It can be carried out.

As described above, the unit control unit 40 of the moving object detection unit 10 controls the radiation frequency of the radio wave radiated from the radio wave detection unit 30 based on the image acquired by the optical detection unit 23, and modulates the radiation frequency. Switching between the first driving mode that is not performed and the second driving mode that modulates the radiation frequency. Thereby, the radio wave detection unit 30 can perform respiration detection in the first drive mode and distance measurement in the second drive mode. At this time, the distance measured by the radio wave detection unit 30 is a distance obtained by a predetermined calculation and is substantially equal to the actual distance. Therefore, the unit controller 40 does not depend on the position of the cared person P in the living room 101 (whether the cared person P is close to or far from the moving object detection unit 10 in the living room 101). Based on the measured distance, the presence or absence of a fall can be accurately determined. Moreover, since the radio wave detection unit 30 that detects the breathing state of the cared person P is used for the fall detection, there is no need to separately provide a sensor dedicated to the fall detection, and the apparatus (moving object detection unit 10) With a simple configuration (using the existing configuration effectively), the fall of the care recipient P can be accurately detected.

Further, the unit controller 40 determines the positional relationship between the position of the care recipient P and the bed 102 (sleeping region R) in the living room 101 based on the image acquired by the optical detector 23. The control of the radiation frequency is switched according to the positional relationship. This makes it possible to reliably detect information to be detected (biological information or falls) depending on whether the care receiver P is on the bed 102 or not. That is, when the cared person P is on the bed 102, the control of the radiation frequency can be switched to the first drive mode to perform respiration detection. When the cared person P is not on the bed 102, the radiation is emitted. The frequency control can be switched to the second drive mode to perform distance measurement and fall detection.

Further, since the position information of the bed 102 in the living room 101 is stored in the storage unit 24 in advance, the unit control unit 40 uses the image recognition unit 25 on the image acquired by the optical detection unit 23. Based on the recognized position of the cared person P and the position of the bed 102 corresponding to the position information stored in the storage unit 24 and the image on the image, the positional relationship between the cared person P and the bed 102 (cared Whether the person P is on the bed 102 or not).

Further, the unit controller 40 switches the control of the radiation frequency depending on whether or not the radiation frequency is modulated. Thereby, in the control (first driving mode) in which the radiation frequency is not modulated, the radio wave detection unit 30 can detect the respiratory state of the care receiver P. On the other hand, in the control for modulating the radiation frequency (second drive mode), since the radio wave detection unit 30 can measure the distance to the care receiver P, the unit control unit 40 can determine the care receiver based on the measured distance. It is possible to detect whether or not P has fallen.

The unit control unit 40 switches the control of the radiation frequency between the first drive mode and the second drive mode according to the positional relationship between the position of the care recipient P and the bed 102. Thereby, the radio wave detection unit 30 can detect the breathing state of the cared person P in the first drive mode and can measure the distance from the cared person P in the second drive mode. Therefore, the unit controller 40 can detect whether the care receiver P has fallen based on the distance measured in the second drive mode.

Further, the care support system 1 of the present embodiment includes a moving body detection unit 10 and a management server 100a that receives and manages information transmitted from the moving body detection unit 10. Even in such a system, since the moving object detection unit 10 described above is included, a care receiver P is not provided regardless of the position of the care receiver P in the living room 101 without separately providing a sensor dedicated to fall detection. The effect of this embodiment that the presence / absence of falling can be detected with high accuracy can be obtained.

In the above, the example in which the measurement (calculation) of the distance between the moving object detection unit 10 and the care recipient is performed by the radio wave detection unit 30 itself that transmits and receives radio waves has been described. However, the distance calculation is performed by the unit control unit 40. You may go. That is, based on the information output from the radio wave detection unit 30, the unit control unit 40 may measure the distance from the care recipient and detect (determine) the presence or absence of a fall.

The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention.

The moving object detection unit and the care support system of the present embodiment described above can be expressed as follows, and it can be said that the following effects can be obtained.

The moving body detection unit of the present embodiment is a moving body detection unit that is installed on a ceiling portion of a living room and detects information on a subject as a moving body in the living room, and acquires an image by photographing the living room. A state detection unit that detects the state of the subject by radiation and reception of radio waves, and a unit control unit that controls a radiation frequency of radio waves radiated from the state detection unit, the unit control unit includes: The control of the radiation frequency is switched based on the image acquired by the optical detection unit.

Since the moving body detection unit is installed on the ceiling of the living room, the optical detection unit included in the moving body detection unit images the room from the ceiling of the living room toward the floor. The unit control unit switches the control of the radiation frequency of the radio wave radiated from the state detection unit based on the image acquired by the optical detection unit. Thereby, for example, when the unit control unit determines from the above image that the subject is in a specific position (for example, on the bed) in the room, the state detection unit in the drive mode in which the radiation frequency is not modulated. When the subject is determined to be in another position (for example, a position on the floor surface), the state detection unit can be driven in a driving mode in which the radiation frequency is modulated. In the former case, the state detection unit can detect the biological information (for example, respiratory state) of the subject by radiating and receiving radio waves. On the other hand, in the latter case, the state detection unit can measure the distance between the state detection unit (moving object detection unit) and the subject by radiating and receiving radio waves. Based on the measured distance, the unit control unit clearly distinguishes whether the subject is standing on the floor or whether the subject is standing or falling. can do.

In this way, the unit control unit switches the control of the radiation frequency based on the image acquired by the optical detection unit, so that the fall of the subject can be performed regardless of the position of the subject in the room. Presence / absence can be detected (judged) with high accuracy. In addition, because the same state detection unit can be used to detect the patient's biological information and falls, there is no need to provide a separate sensor dedicated to fall detection, and the fall of the subject can be accurately performed with a simple configuration. Can be detected.

The unit control unit determines the positional relationship between the position of the subject in the living room and the sleeping area where the bed or the futon is arranged in the living room based on the image, and according to the determined positional relationship The control of the radiation frequency may be switched.

For example, when the subject is in the sleeping area, it is not necessary to detect the fall of the subject, and it is desirable to detect the breathing state of the subject. On the other hand, when the subject is outside the sleeping area, it is not necessary to detect the breathing state of the subject, and it is necessary to detect the fall of the subject. As described above, according to the position of the subject in the room, the unit control unit switches the control of the radiation frequency according to the positional relationship between the subject and the sleeping area in the room, Information to be detected (biological information or the presence or absence of a fall) can be reliably detected.

The moving body detection unit includes an image recognition unit that recognizes the position of the subject by performing an image recognition process on the image, and a storage unit that stores in advance the position information of the sleeping region in the living room. The unit control unit further includes a position of the subject recognized by the image recognition unit, a position corresponding to the position information of the sleeping region stored in the storage unit and a position on the image. Based on this, the positional relationship may be determined.

Since the position information of the sleeping region is stored in the storage unit in advance, the unit control unit stores the position information corresponding to the stored sleeping region position information on the image and the subject recognized by the image recognition unit. Based on the position, the positional relationship between the subject and the sleeping area in the living room can be reliably determined.

The unit control unit may switch the control of the radiation frequency depending on whether or not the radiation frequency is modulated.

In the control in which the unit control unit does not modulate the radiation frequency, the state detection unit can detect the biological information of the subject by emitting and receiving radio waves. In the control in which the unit control unit modulates the radiation frequency, the state detection unit can measure the distance between the state detection unit and the subject by radiating and receiving radio waves. As a result, the unit control unit can detect (determine) whether or not the subject has fallen based on the measured distance.

The unit control unit modulates the radiation frequency according to the positional relationship between the position of the subject and the sleeping area, the first drive mode in which the radiation frequency is not modulated, and the radiation frequency is modulated. The second driving mode may be switched.

The unit control unit switches the control of the radiation frequency between the first drive mode and the second drive mode in accordance with the positional relationship, so that the state detection unit can detect the subject in the first drive mode. The biological information can be detected, and the distance between the state detection unit and the subject can be measured in the second drive mode. As a result, the unit control unit can detect (determine) whether or not the subject has fallen based on the distance measured in the second drive mode.

The care support system of the present embodiment includes the above-described moving body detection unit and a management server that receives and manages information transmitted from the moving body detection unit. In this case, the above-described effects can be obtained in the care support system including the moving object detection unit and the management server.

The present invention can be used for a care support system that supports the daily life of a subject such as a care recipient in a living room.

DESCRIPTION OF SYMBOLS 1 Care support system 10 Moving body detection unit 23 Optical detection part 24 Memory | storage part 25 Image recognition part 30 Radio wave detection part (state detection part)
40 Unit control unit 100a Management server 101 Living room 101a Ceiling part 102 Bed P Caregiver (examinee)
R sleeping area

Claims

A moving body detection unit that is installed on a ceiling of a living room and detects information of a subject as a moving body in the living room,
An optical detector that captures an image of the room and acquires an image;
A state detector that detects the state of the subject by emitting and receiving radio waves;
A unit controller that controls the radiation frequency of the radio waves radiated from the state detector
The unit control unit is a moving body detection unit that switches control of the radiation frequency based on the image acquired by the optical detection unit.
The unit control unit determines the positional relationship between the position of the subject in the living room and the sleeping area where the bed or the futon is arranged in the living room based on the image, and according to the determined positional relationship The moving body detection unit according to claim 1, wherein the control of the radiation frequency is switched.
An image recognition unit that recognizes the position of the subject by performing image recognition processing on the image;
A storage unit that stores in advance position information of the sleeping area in the living room;
The unit control unit is based on the position of the subject recognized by the image recognition unit, the position information of the sleeping region stored in the storage unit, and the corresponding position on the image, The moving object detection unit according to claim 2, wherein the positional relationship is determined.
The moving object detection unit according to any one of claims 1 to 3, wherein the unit control unit switches the control of the radiation frequency depending on whether or not the radiation frequency is modulated.
The unit control unit modulates the radiation frequency according to the positional relationship between the position of the subject and the sleeping area, the first drive mode in which the radiation frequency is not modulated, and the radiation frequency is modulated. The moving body detection unit according to claim 2, wherein the moving body detection unit switches between the second driving mode and the second driving mode.
The moving object detection unit according to any one of claims 1 to 5,
A care support system including a management server that receives and manages information transmitted from the moving object detection unit.