WO2016088717A1

WO2016088717A1 - Monitoring device

Info

Publication number: WO2016088717A1
Application number: PCT/JP2015/083616
Authority: WO
Inventors: 和田　滋
Original assignee: コニカミノルタ株式会社
Priority date: 2014-12-01
Filing date: 2015-11-30
Publication date: 2016-06-09

Abstract

The purpose of the present invention is to provide a monitoring device A that has less of a tendency to cause discomfort, fear, or pain to a person to be monitored and can accurately detect the state of the person being monitored. In order to accomplish this, the monitoring device A is arranged so that the distance between a radio wave adjusting part 32 for increasing the directionality of radio waves transmitted by a radio wave transceiver part and a cover 22 covering the radio wave transceiver part and the radio wave adjusting part while allowing the radio waves to pass therethrough is an integer multiple of half the wavelength of the radio waves.

Description

Watch device

に関する It relates to a monitoring device that monitors the condition of the person being watched over.

In elderly care facilities and hospitals (hereinafter referred to as “health facilities”), when the occupants and patients (hereinafter referred to as “persons to be watched over”) have little (or no) visibility at night, , May fall. In preparation for such a case, in the health facility, a switch for an emergency call that conveys an emergency to a caregiver, a nurse, or the like (hereinafter referred to as a watcher) to the bedside where the person being watched is sleeping (So-called nurse call switch) is arranged. When the person to be watched operates an emergency call switch, the person in charge of watching is notified, and the person in charge of watching rushes to the person to be watched.

On the other hand, when an accident such as a sudden change or a fall of the container occurs, the person to be watched may not be able to operate the switch for emergency calls. In such a case, the person in charge of watching over the person to be watched over Is not aware of an emergency, and even a small accident can result in a serious accident. In addition, the person in charge of watching is also looking around the person being watched over, but it is impossible to look around all the time.

Therefore, a monitoring device that detects the state of the person being watched over or detects movement has been proposed. The monitoring device detects the state or movement of the watching target person by attaching a sensor to the watching target person or the bed. For example, sensors that are attached to the person being watched over include sensors that detect vital signs such as respiration, oxygen saturation (SpO2), pulse, blood pressure, and the like. In addition, as a thing to be attached to the bed, such as a mat sensor arranged under the mat, a bed sensor arranged beside the bed edge or the bed, a bed side gate sensor, etc. Mention may be made of sensors that detect contact.

Also, as shown in JP 2010-537672, a monitoring device including an imager (imaging device) for monitoring the state of the patient's body surface has been proposed. In the case of this apparatus, it is possible to determine whether the patient is pale or flushed from the captured image of the patient's body surface. For example, in the case of pallor, it is possible to detect blood loss and other diseases. Moreover, when it is flushed, it can detect that it is in a state such as fever and hyperglycemia.

In this way, by monitoring the person to be watched, even if the person in charge of watching watches the eyes, if there is an abnormality in the person to be watched, various sensors etc. detect and contact the person in charge of watching. Therefore, it is possible to suppress delay in handling.

An active sensor described in Japanese Patent Application Laid-Open No. 2010-78375 irradiates a target with radio waves and detects movement to a building or room using the Doppler effect. When the distance to the outer case is an integral multiple of a quarter wavelength of the irradiated radio wave, a standing wave is generated and the power level of the radio wave is attenuated, so avoid an integral multiple of the quarter wavelength of the radio wave. Thus, what forms an exterior case is disclosed.

By suppressing the standing wave in this way, it is possible to suppress the attenuation of the power level of the radio wave and increase the detection distance. And there exists a thing which detects a body motion by detecting the change of the said monitoring subject using the Doppler sensor using such an electromagnetic wave.

JP 2010-537672 A JP 2010-78375 A

In the conventional monitoring device, a sensor for detecting vital signs is attached to the person being watched over. However, if the person to be watched is an inpatient due to a mild illness or a healthy elderly person, when the sensor is attached even though the vital sign is not required, Causes pain. In addition, by attaching a sensor for acquiring vital signs that are not necessary, the person to be watched may feel that his / her body is worse than he / she thinks and may increase anxiety.

Also, in the case of the device disclosed in Japanese Translation of PCT International Publication No. 2010-537672, the color, state, etc. of the body surface are determined based on the image taken by the imager. When making such a determination, at least the part of the person to be watched that is photographed by the imager needs lighting for sufficiently judging the color, shape, etc., and at night, the person to be watched and the object to be watched by the room May disturb the person's sleep. Further, when an imager is arranged, the person to be watched may feel anxiety and fear due to the presence of the imager.

In addition, the apparatus disclosed in Japanese Patent Application Laid-Open No. 2010-78375 requires a structure for transmitting and receiving radio waves of a plurality of wavelengths, and is configured to select a wavelength having a high intensity by simultaneously emitting a plurality of wavelengths. Therefore, the control is complicated. In addition, if the length from the antenna to the outer case is shifted from an integral multiple of a quarter wavelength of the radio wave, the phase of the reflected radio wave from the outer case is shifted, and the detection accuracy may be reduced.

Therefore, an object of the present invention is to provide a watching device that makes it difficult for the subject to feel discomfort, fear, or pain and that can accurately detect the state of the subject.

In order to achieve the above object, the present invention is a monitoring device that detects the body motion of the watching target person by utilizing the Doppler effect when a reflected wave is detected by irradiating the watching target person with radio waves. A radio transmission / reception unit including a transmission unit that irradiates and a reception unit that receives a radio wave reflected by the person being watched over, a radio wave adjustment unit that increases the directivity of the radio wave transmitted by the radio wave transmission / reception unit, the radio wave transmission / reception unit, and the radio wave adjustment And a cover through which the radio wave is transmitted. The distance of the surface of the cover facing the radio wave transmission / reception unit from the radio wave transmission / reception unit is an integral multiple of a half wavelength of the radio wave.

According to the present invention, it is possible to provide a monitoring device that makes it difficult for the subject to feel discomfort, fear, or pain and that can accurately detect the state of the subject.

It is sectional drawing of an example of the monitoring apparatus concerning this invention. It is a block diagram of the watching apparatus shown in FIG. It is a figure which shows the state which is monitoring the monitoring subject with the monitoring apparatus shown in FIG. It is the schematic of the emergency call system using the monitoring apparatus concerning this invention. It is sectional drawing of the other example of the monitoring apparatus concerning this invention. It is a block diagram of a watching device concerning the present invention. It is a top view of the further another example of the monitoring apparatus concerning this invention. It is a top view of the further another example of the monitoring apparatus concerning this invention.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
An example of a monitoring device according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an example of a watching device according to the present invention, FIG. 2 is a block diagram of the watching device shown in FIG. 1, and FIG. 3 monitors a person to be watched by the watching device shown in FIG. FIG. Since FIG. 3 is a diagram illustrating a radio wave irradiation state, only the microwave sensor unit 3 that irradiates the microwave, the exterior cover 22, the watching target person Th, and the bed Bd are displayed.

As shown in FIG. 3, the monitoring device A according to the present invention irradiates a watching target person Th (hereinafter sometimes simply referred to as a target person) with microwaves, detects the microwave reflected by the target person, Based on the phase difference, the body motion (breathing, getting out of bed, etc.) of the subject is detected, and the state of the subject is detected. That is, the watching device A is a device using the Doppler effect. The watching device A according to the present invention is attached to the ceiling Ce of the living room where the watching target person Th sleeps. The monitoring device A of the present embodiment is disposed directly above a place (here, the bed Bd) where the person to be watched Th on the ceiling Ce of the living room sleeps.

As shown in FIG. 1, the watching device A is embedded in a hole C1 formed in the ceiling Ce. As shown in FIGS. 1 and 2, the monitoring device A includes an embedded box 1, an exposed box 2, a microwave sensor unit 3, a processing unit 4, a communication unit 5, a microphone 7, and a speaker 8. Yes. The embedded box 1 is a cylindrical bottomed box, and is inserted into a hole C1 formed in the ceiling Ce. The embedded box 1 includes a cylindrical portion 11 and a bottom portion 12 formed at one end of the cylindrical portion 11 in the axial direction. The embedded box 1 is inserted into the hole C1 so that the bottom 12 is disposed behind the ceiling. Although the cylindrical portion 11 and the bottom portion 12 of the embedded box 1 are integrated, they may be formed by integral molding or may be separately molded and then assembled. Good. Further, the embedded box 1 can be made of metal, but is not limited thereto.

The exposed box body 2 has a larger projected area than the embedded box body 1 and includes a base plate 21 and an exterior cover 22. The base plate 21 is a square thin plate, and a through hole 211 having the same inner diameter as the inner diameter of the cylindrical portion 11 of the embedded box 1 is formed at the center. The base plate 21 and the embedded box 1 are connected to each other, and the through hole 211 and the cylindrical portion 11 are communicated with each other. That is, the embedded box 1 has a configuration that protrudes vertically from one of the main surfaces of the base plate 21.

Further, a peripheral wall portion 212 protruding to the opposite side to the embedded box 1 is formed on the outer peripheral surface of the main surface of the base plate 21 opposite to the surface where the embedded box 1 is connected. Has been. A screw hole (not shown) is formed in the base plate 21, and the monitoring device A is fixed to the ceiling Ce by screwing it to the ceiling Ce using the screw hole. ing. The base plate 21 is made of metal, like the embedded box 1.

The exterior cover 22 is a cover that covers the base plate 21. The exterior cover 22 includes a flat portion 221 that covers the base plate 21 in a plan view, and a side wall portion 222 that is connected to the outer peripheral portion of the flat portion 221. The plane part 221 has a larger projected area than the base plate 21, and the side wall part 222 is arranged in contact with the outside of the peripheral wall part 212 of the base plate 21. The exterior cover 22 is formed of a resin that transmits microwaves emitted from the microwave sensor unit 3 (that is, a material having a low relative dielectric constant). The exterior cover 22 may be made of, for example, a resin having a relative dielectric constant of about 3 such as glass fiber, carbon-free polycarbonate, ABS, or the like.

The exterior cover 22 is detachable from the base plate 21. As a structure for attaching the exterior cover 22 to the base plate 21, for example, an elastic engagement portion provided on the peripheral wall portion 212 and the side wall portion 222 may be used, or a fixing tool such as a screw is used. It may be a thing.

By attaching the exterior cover 22 to the base plate 21, the inside of the watching device A, in particular, the microwave sensor unit 3 can be made invisible from the outside, and the subject is not easily noticed. Thereby, it is difficult for the subject person to recognize that the inspecting apparatus A infringes on the privacy, and the subject person can hardly feel uncomfortable feeling and uncomfortable feeling.

The microwave sensor unit 3 emits a plurality of radio waves (microwaves) having different phases and detects reflected waves. And it is a Doppler sensor which detects the movement of a detection target (target person) by confirming the shift | offset | difference of the phase of the detected reflected wave. The microwave sensor unit 3 is disposed inside the embedded box 1.

The microwave sensor unit 3 increases the directivity of the microwave emitted from the sensor element 31 including the transmitting antenna 311 for transmitting the microwave and the receiving antenna 312 for receiving (both refer to FIG. 2). And a radio wave adjustment unit 32. That is, the sensor element 31 is an example of a radio wave transmission / reception unit.

The sensor element 31 is arranged on a substrate 310 whose entire surface is shielded, and radiates microwaves on the mounting surface side (downward in the watching device A). The microwave sensor unit 3 detects the reflected wave and detects the subject's body movement from the fluctuation of the phase. The movement of the subject detected by the watching device A is a movement in a direction approaching or separating from the watching device A. Therefore, it is preferable to prevent the microwaves from being irradiated to the body other than the subject as much as possible. For this reason, the microwave sensor unit 3 uses the radio wave adjustment unit 32 so as to irradiate the radiated microwave in as narrow an area as possible (increase the directivity).

Accordingly, the radio wave adjustment unit 32 includes a reflection lens cylinder 321 having a metal surface and having a recess in which the sensor element 31 is arranged in the center, and a lens unit 322 arranged so as to close the opening of the reflection lens cylinder 321. . The lens unit 322 is a radio wave lens for refracting microwaves and improving directivity.

Watching device A detects the subject's body movement. Body movement includes movement such as turning over, getting up, and breathing. For example, when turning over, in many cases, the upper body moves and the distance from the watching device A varies. Further, since the chest and abdomen are displaced when breathing, the distance from the watching device A varies. Therefore, in the monitoring device A, the directivity is adjusted by the radio wave adjustment unit 32 so that the radio wave emitted from the transmission antenna 311 is irradiated to the upper body (mainly the chest and abdomen) of the subject. However, the present invention is not limited to this.

The microwave sensor unit 3 includes an azimuth adjusting mechanism 33 for changing the irradiation direction of the microwave. And the direction adjustment mechanism 33 can fix the irradiation direction, after adjusting the irradiation direction of a microwave.

The sensor element 31 of the microwave sensor unit 3 is connected to the processing unit 4. In the microwave sensor unit 3, a microwave whose phase is shifted by the same wavelength and amplitude is radiated from the transmitting antenna 311 toward the subject, and the microwave reflected by the surface of the subject is received by the receiving antenna 312. The processing unit 4 detects the body movement of the subject based on the phase difference of the microwave reflected by the receiving antenna 312.

The detection of the body movement of the processing unit 4 will be described. When the object to be irradiated with the microwave does not move, the distance between the monitoring device A and the object does not vary, and therefore when the reflected wave is received, the phase difference of the reflected wave is the same as the phase difference of the transmitted wave. On the other hand, when the subject moves due to turning over or getting up, the distance between the watching device A and the subject fluctuates, so the phase difference of the reflected wave is different from the phase difference of the transmitted wave. The processing unit 4 detects the movement of the subject by detecting the change in the phase difference.

Also, when the subject is breathing, the chest and abdomen change, and the distance from the monitoring device A to the chest or abdomen changes. When breathing at a constant rhythm, the phase difference of the reflected wave fluctuates at a constant period. On the other hand, when the breathing suddenly becomes faster or slower, the phase difference fluctuation cycle changes. The monitoring device A can detect that the respiration of the subject is unstable by detecting that the phase of fluctuation of the phase difference has changed.

The watching device A includes a communication unit 5 and notifies the person in charge of watching using the communication unit 5. When the communication unit 5 is connected to the processing unit 4 and the processing unit 4 determines that there is an abnormality of the target person, the communication unit 5 transmits an emergency signal through the communication unit 5 to a device that can be recognized by the person in charge of watching. . Note that the communication unit 5 can perform wired connection or wireless connection.

The speaker 8 is used for the person in charge of watching to call the target person by voice in response to an emergency call from the watching apparatus A. Moreover, the microphone 7 receives the voice input of the subject person, and can input a response by the voice of the subject person in response to a call from the person in charge of watching. The microphone 7 and the speaker 8 are preferably arranged so that the sound from the speaker 8 is not collected by the microphone 7. Further, the microphone 7 or the speaker 8 is not always necessary.

Next, the configuration of the watching device A will be described with reference to the drawings. As shown in FIG. 3, the monitoring device A detects the state of the subject by radiating the microwave from the sensor element 31 of the microwave sensor unit 3 to the subject and receiving the reflected wave. At this time, a part of the microwave radiated from the sensor element 31 is reflected by the inner surface of the exterior cover 22.

In this type of apparatus using microwaves, when a cover is attached to the front surface of the microwave generation apparatus, a standing wave is generated between the radio wave adjusting unit 32 and the exterior cover 22 by a reflected wave from the cover. It is known that when a standing wave is formed, the output characteristics of the microwave deteriorate and the distance that the microwave reaches becomes short. Therefore, in a conventional apparatus that detects an object using the Doppler effect using microwaves, a standing wave is prevented from being generated between the inner surface of the exterior cover 22 and the radio wave adjustment unit 32 (or the sensor element 31). Therefore, the distance between the inner surface of the outer cover 22 and the radio wave adjustment unit 32 is adjusted so as not to be an integral multiple of 1/4 of the wavelength of the emitted microwave.

In the monitoring device A according to the present embodiment, since a material having a low relative dielectric constant is used as the exterior cover 22, the reflectance of the microwave on the inner surface of the exterior cover 22 is low, and the power level is attenuated by the standing wave. There are few. Further, in the monitoring device A according to the present embodiment, since the distance from the sensor element 31 provided on the ceiling to the subject on the bed Bd is short, the power level of the radio wave from the sensor element 31 is somewhat due to the standing wave. Even if the detection distance decreases due to attenuation, the detection result has little effect.

However, as shown in Japanese Translation of PCT International Publication No. 2010-537672, when the distance between the sensor element 31 and the outer cover 22 is adjusted so as not to be an integral multiple of ¼ wavelength, the microwave is constant in the outer cover 22. The radio wave intensity of the microwave reflected by the portion having the above amplitude and reflected by the exterior cover 22 incident on the receiving antenna 312 may be strong. On the other hand, since the reflected wave on the surface of the subject is a microwave reflected at a position farther from the exterior cover 22, the output is attenuated, and the reception sensitivity of the receiving antenna 312 is reduced by the microwave reflected by the subject. When the adjustment is performed so that the signal can be received with high accuracy, the microwave reflected by the exterior cover 22 may be detected even if the reflectance of the exterior cover 22 is low.

For example, when the phase of the microwave reflected by the exterior cover 22 is known, the influence of the microwave reflected by the exterior cover 22 can be removed by removing the reception of the microwave of that phase.

However, in a private room or a hospital of a nursing home, an air conditioner is often attached to the ceiling Ce, and vibration during operation of the air conditioner may be transmitted to the watching device A through the ceiling Ce. When vibration is transmitted to the watching device A, since the base plate 21 and the exterior cover 22 are separate members, the base plate 21 and the exterior cover 22 vibrate relatively. When the base plate 21 and the exterior cover 22 relatively vibrate, the distance between the sensor element 31 and the exterior cover 22 varies, so that the phase of the microwave reflected by the exterior cover 22 varies.

It is difficult to grasp in advance and remove the influence on the detection result due to the change in the phase of the microwave caused by the vibration of the air conditioner. If the phase of the reflected microwave fluctuates, it becomes noise or a suspicious signal, leading to false detection. Even if the distance between the sensor element 31 and the exterior cover 22 slightly changes, the noise and the suspicion signal greatly affect the detection accuracy. In particular, when a slight change in body movement due to the breathing of the subject on the bed Bd is detected by a change in the phase of the microwave reflected from the subject, high detection accuracy is required. The impact on accuracy is significant.

In the monitoring device A according to the present embodiment, since a material having low reflectance is used for the exterior cover 22, even if a standing wave is generated between the sensor element 31 and the exterior cover 22, it is emitted from the sensor element 31. Since the microwave field strength is higher than the standing wave, it is not easily affected by the standing wave. Further, by arranging the exterior cover 22 so that the inner surface of the microwave node overlaps the inner surface of the exterior cover 22 and reflecting it at the node portion, the radio wave intensity when entering the receiving antenna 312 is suppressed. The microwave reflected by the exterior cover 22 is unlikely to adversely affect the detection of the microwave reflected by the subject.

In addition, since the exterior cover 22 is disposed so that the microwave is reflected by the exterior cover 22 at the node portion, even if the distance between the sensor element 31 and the exterior cover 22 changes, the emitted microwaves are applied to the node. Since the light is reflected at a close portion, the radio wave intensity of the microwave reaching the receiving antenna of the sensor element 31 is also reduced. Thereby, it can suppress that the detection accuracy of the microwave reflected by the surface of the subject falls.

That is, the monitoring device A according to the present embodiment places the sensor element 31 and the exterior cover 22 so that the distance L between the inner surface of the exterior cover 22 and the sensor element 31 is an integral multiple of a half wavelength of the microwave. (Refer to FIG. 3 etc.).

In the monitoring apparatus A according to the present embodiment, the body motion of the subject person is detected using the Doppler effect with microwaves. Therefore, the monitoring apparatus A is in the direction of approaching and retreating to the monitoring apparatus A of the subject person. Detect movement. That is, the watching device A can detect the body movement of the subject that can be detected by the movement in the approaching and retreating direction.

Next, a monitoring system using the monitoring device A will be described with reference to the drawings. FIG. 4 is a schematic diagram of an emergency call system using the watching device according to the present invention. The watching system Es shown in FIG. 4 is a system that monitors the state of a subject who is sleeping in a private room such as a nursing home and reports an abnormality detection.

As shown in FIG. 4, the watching system Es has a watching device A attached to each of a plurality of rooms. A plurality of watching devices A are connected to the server Sv. Furthermore, the server Sv transmits an alarm signal to the alarm device Ar provided in the waiting room of the person in charge of watching, and notifies the person in charge of abnormality of the target person. That is, in the watching system Es, a plurality of watching devices A are connected to the server Sv, and the server Sv is connected to the alarm device Ar.

The monitoring system Es normally detects the state of the subject (sleeping state, body movement such as breathing) with the monitoring device A provided in each room. When breathing is detected, the number of breaths may be transmitted to the server Sv at regular time intervals. The server Sv monitors information on the number of breaths. In addition, the monitoring device A in each room may start the monitoring operation when a predetermined time comes, or start the operation in conjunction with the electrical appliance (for example, lighting or television) in the room. You may make it do. Alternatively, the watching operation may be started by detecting that the subject has entered the bed.

When the monitoring device A provided in each room detects an abnormality of the subject person, an emergency signal is transmitted to the server Sv using the communication line. The server Sv transmits information indicating that the abnormality has occurred in the subject in which the abnormality has occurred to the alarm device Ar and notifies the person in charge of watching.

Thus, by using the monitoring device A, the abnormality of the subject can be achieved without arranging a large number of detectors around the sleeping place (for example, a bed) or attaching a sensor to the subject's body. Therefore, it is possible to quickly inform the person in charge of the monitoring of the abnormality of the target person. As a result, even if there are few watchers in charge, it is possible to surely recognize the abnormality of the target person and respond quickly. In addition, since the monitoring device A constantly monitors the body movement (breathing) of the subject, it can be used to monitor changes in breathing while sleeping and to help find diseases (such as sleep apnea syndrome).

Note that a mobile terminal may be distributed to each person in charge of watching and may be transmitted to the mobile terminal simultaneously with transmission of a signal to the alarm device Ar. In addition, the alarm device Ar and / or a device (such as a microphone or a speaker) that performs a call to the mobile terminal is provided, and a mutual communication is performed with the monitoring device A that has notified that an abnormality has occurred. It may be.

In addition, in this embodiment, although the monitoring apparatus A shall be embedded in the hole C1 provided in the ceiling Ce, it is not limited to this, You may provide in the side wall or the floor surface. Moreover, if it is a structure which is hard to be recognized by the subject, it is not limited to the embedded type, and may be a structure attached to the outside of the attachment surface.

(Second Embodiment)
Another example of the watching device according to the present invention will be described with reference to the drawings. FIG. 5 is a sectional view of another example of the watching device according to the present invention, and FIG. 6 is a block diagram of the watching device according to the present invention. A watching device A2 shown in FIG. 5 has a configuration in which the watching device shown in the first embodiment includes a camera unit 6 that photographs a subject. Therefore, substantially the same parts are denoted by the same reference numerals, and detailed description of the same parts is omitted.

In the watching device A2 shown in FIG. 5 and FIG. 6, a camera unit 6 (imaging unit) is arranged in the display box 2. The camera unit 6 includes an imaging device that receives infrared light and images a subject, and includes a so-called infrared camera. The camera unit 6 is an imaging device having a wide angle of view and uses a well-known device, and thus detailed description thereof is omitted.

And as shown in FIG. 5, the camera part 6 is arrange | positioned along with the microwave sensor part 3 in the direction along a ceiling surface. The infrared light receiving unit of the camera unit 6 is provided with an optical system. By using the optical system, the angle of view can be enlarged / reduced, the focus can be adjusted, and the like. The camera unit 6 is configured to optically image the subject, and it is preferable to always image the entire subject. Therefore, the optical system of the camera unit 6 has a wide angle and is disposed close to the exterior cover 22.

And the camera part 6 is arrange | positioned from the position which remove | deviates from the irradiation range of the microwave radiate | emitted from the microwave sensor part 3, ie, the outside area | region of the radio wave irradiated from the sensor element 31 which is a radio wave transmission / reception part. Thereby, the fall of the precision which detects the subject's body motion using the Doppler effect of the microwave sensor part 3 is suppressed. The camera unit 6 may capture the subject at regular time intervals, or may capture continuously such as moving image shooting.

The camera unit 6 is also connected to the processing unit 4 of the watching device A2, and the imaging data of the subject imaged by the camera unit 6 is acquired. Then, image processing is performed on the imaged data to recognize the position of the subject person. Then, the processing unit 4 recognizes that some abnormality has occurred in the subject when the subject has deviated from a predetermined position or when the subject has not been confirmed in the imaging data. When it is determined that an abnormality has occurred in the subject person, the processing unit 4 performs emergency communication via the communication unit 5.

For example, from the result of image processing of captured data, if the subject is confirmed away from the bed, it is determined that the subject is separated from the sleeping place (for example, bed) for some reason and falls down at the separated place. it can. In addition, when a certain period of time has elapsed since the subject is no longer confirmed in the imaging data, it is determined that an abnormality has occurred in the subject at a location that cannot be detected by the watching device A2.

In the monitoring device A2 of this embodiment, the microwave sensor unit 3 detects the movement of the subject in the approaching and retreating direction due to the Doppler effect. And the movement of the direction which cross | intersects a subject's approaching / retreating direction is detected with the camera part 6. FIG. That is, the types (directions) of body movements of the target person that can be detected increase. Therefore, it is possible to detect the body movement, movement, etc. of the subject with high accuracy, and thus it is possible to detect many abnormalities that have occurred in the subject.

It should be noted that, as an arrangement direction of the microwave sensor unit 3 and the camera unit 6, the aspect minor axis direction of the angle of view of the camera unit 6 can be exemplified. By arranging in this way, the microwave sensor unit 3 and the camera unit 6 can be arranged close to each other, so that the watching device A2 can be downsized.

Other parts are the same as in the first embodiment.

(Third embodiment)
Still another example of the monitoring apparatus according to the present invention will be described with reference to the drawings. FIG. 7 is a plan view of still another example of the watching device according to the present invention. The watching device A3 shown in FIG. 7 has the same configuration as the watching device A2 of the second embodiment except that the exterior cover 22 is different. Therefore, in the watching device A3, the same reference numerals are given to substantially the same portions as the watching device A2, and detailed description of the same portions is omitted.

Although the camera unit 6 uses a near-infrared camera, since an imaging optical system (lens or the like) is used, the presence of the camera unit 6 may be noticed depending on the subject. And some of the subjects are photographed with a camera, so they feel anxiety and fear, become mentally unstable, or cause distrust to the person in charge of watching. May not be able to sleep properly.

Therefore, the exterior cover 22 of the watching device A3 includes a filter unit 223 (a blindfold) that cuts visible light at a portion covering the camera unit 6. Since the imaging device of the camera unit 6 is configured to receive infrared light and generate imaging data, even if the exterior cover 22 includes the filter unit 223, the subject person can be imaged through the filter unit 223. it can. On the other hand, since the filter part 223 cuts visible light, even if the subject looks at the watching device A3, he does not notice that the camera part 6 is arranged. Thereby, while being able to reduce a mental burden of a subject, it becomes difficult for a subject to refuse installation of watching device A3, and a burden on a watching person in charge can be reduced.

When microwaves emitted from the microwave sensor unit 3 pass through the exterior cover 22, the microwaves are refracted when passing through a boundary portion between a different (different dielectric constant) filter unit 223 and other portions. When the microwave is refracted, it is difficult to accurately detect the body motion of the subject due to the Doppler effect. Therefore, in the watching device A3, the microwave sensor unit 3 and the camera unit 6 are disposed and the exterior cover 22 is configured so that the microwaves emitted from the microwave sensor unit 3 do not pass through the filter unit 223. By comprising in this way, a subject's state can be detected more correctly.

Other features are the same as those in the first embodiment and the second embodiment.

(Fourth embodiment)
Still another example of the monitoring apparatus according to the present invention will be described with reference to the drawings. FIG. 8 is a plan view of still another example of the watching device according to the present invention. The watching device A4 shown in FIG. 8 has the same configuration as the watching device A3 shown in the third embodiment except that the camera unit 6b is different. Therefore, substantially the same parts as those of the watching apparatus A3 of the watching apparatus A4 are denoted by the same reference numerals, and detailed description of the same parts is omitted.

In the watching device A4 shown in FIG. 8, a light source unit 62 is arranged so as to sandwich the imaging part 61 in the camera unit 6b. The imaging part 61 has the same configuration as the camera unit 6 of the second embodiment and the third embodiment. The light source unit 62 has a configuration in which a plurality of light emitting elements are arranged side by side. The light source unit 62 is an element that emits light including infrared light, and a near-infrared LED element is used. However, the present invention is not limited to this.

The light source unit 62 in which the near-infrared LED elements are arranged is arranged at a position hidden by the filter unit 223 when viewed from the subject side. Near-infrared LED elements emit infrared light, but also emit light in the visible light region. Since the light source unit 62 is hidden by the filter unit 223, visible light visible to the subject is cut out of the light emitted from the light source unit 62. For this reason, it is possible to prevent the subject from feeling anxiety, discomfort, and distrust.

Examples of the arrangement direction of the infrared LED elements of the light source unit 62 include a direction orthogonal to the arrangement direction of the microwave sensor unit 3 and the imaging part 61. By arranging in this way, the area of the filter part 223 can be reduced. Further, by arranging the light emitted from the light source unit 62 to pass through the filter unit 223 and irradiate the subject, the imaging unit 6b can accurately capture the subject by suppressing the luminance. Is possible.

Other features are the same as those in the first to third embodiments.

A ... watching device, 1 ... embedded box, 11 ... cylindrical part, 12 ... bottom part, 2 ... exposed box, 21 ... base plate, 211 ... -Through-hole, 212 ... peripheral wall part, 22 ... exterior cover, 221 ... flat part, 222 ... side wall part, 223 ... filter part, 3 ... microwave sensor part, 31 .. Sensor element, 311... Transmitting antenna, 312... Receiving antenna, 32 .. radio wave adjustment unit, 321... Reflective lens tube, 322. ... Communication part, 6 ... Camera part, 6b ... Camera part, 61 ... Imaging part, 62 ... Light source part, 7 ... Microphone, 8 ... Speaker

Claims

A monitoring device that detects the body movement of the watching target person using the Doppler effect when the reflected wave is detected by irradiating the watching target person with radio waves,
A radio transmission / reception unit including a transmission unit that emits radio waves and a reception unit that receives radio waves reflected by the watching target;
A radio wave adjustment unit that increases the directivity of the radio wave transmitted by the radio wave transmission / reception unit;
A cover that covers the radio wave transmission and reception unit and the radio wave adjustment unit and transmits the radio wave;
The monitoring apparatus, wherein a distance of the surface of the cover facing the radio wave transmission / reception unit from the radio wave transmission / reception unit is an integer multiple of a half wavelength of the radio wave.
The monitoring device according to claim 1, further comprising an imaging unit that images the person to be monitored within a range covered by the cover.
The monitoring device according to claim 2, wherein the imaging unit is disposed outside a region through which the radio wave emitted from the radio wave transmission / reception unit is transmitted.
The cover covers the imaging unit, and includes a blindfold that suppresses transmission of light in the visible light range,
The monitoring device according to claim 2, wherein the imaging unit and the radio wave transmission / reception unit are arranged so that radio waves emitted from the radio wave transmission / reception unit do not interfere with a boundary between the blindfolds.
The monitoring device according to any one of claims 2 to 4, wherein the imaging unit includes an imaging element and an illumination unit.
The monitoring device according to claim 5, wherein the light emitted from the illumination unit includes light in an infrared region.
The illumination unit has a structure in which a plurality of light emitting elements are arranged,
The monitoring device according to claim 5 or 6, wherein an arrangement direction of the light emitting elements is a direction orthogonal to a line connecting the radio wave transmission / reception unit and the imaging element.
The watching device according to any one of claims 1 to 7, wherein an angle at which the radio wave transmission / reception unit emits radio waves can be changed.
The monitoring device according to any one of claims 1 to 8, further comprising a voice input unit and a voice output unit.
It has a communication unit with external equipment,
The monitoring device according to any one of claims 1 to 9, wherein the communication unit transmits a signal notifying the state of the person to be monitored.