WO2016159347A1

WO2016159347A1 - State determining device

Info

Publication number: WO2016159347A1
Application number: PCT/JP2016/060917
Authority: WO
Inventors: 佳宜石橋; 宏暢前澤
Original assignee: パラマウントベッド株式会社
Priority date: 2015-04-02
Filing date: 2016-04-01
Publication date: 2016-10-06

Abstract

The state determining device according to the present invention is provided with a load sensor for sensing a load applied to a bed, a load data acquiring unit for acquiring load data indicating the load sensed by the load sensor, a biological information data acquiring unit for acquiring biological information data indicating biological information of a user, and a determination unit for determining, as the state of the user, whether the user is occupying the bed on the basis of the load data and the biological information data. Through this configuration the cost of sensors and other equipment is low, the state of the user with respect to the bed can be rapidly determined when there is a change in the state, and erroneous determination of people and objects (erroneous determination whereby an object is sensed as a user) can be prevented.

Description

State determination device

The present invention relates to a state determination apparatus capable of performing state determination such as leaving or staying of a user who uses a bed or a lift (hereinafter referred to as a bed including a lift etc.) with high accuracy.

In a hospital or a nursing home, etc., a patient or a care recipient (elderly person) or the like lies on a bed of a bed to receive treatment or care and take rest and sleep in life. At this time, whether the patient or the cared person (hereinafter referred to as the user) is on the bed berth (is in bed) or is it separated from the bed (is it going out of bed), nursing The teacher or carer needs to know. For this reason, there has been proposed a state determination device that determines the state of the user in the bed.

Load cells are installed on the four legs supporting the bed, and the load detection values detected by the four load cells from time to time are used to determine the presence and absence of the user on the bed. There is something to judge. However, in this state determination device, load cells are installed on the four support legs, calculation results of detection results of each load cell are calculated to calculate the weight on the bed, and the barycentric position of the bed is determined. The device is bulky and expensive to determine if the user is sleeping on the bed, sitting at the end of the bed, or leaving the bed.

Therefore, in the technique described in Patent Document 1, the change of the load value on the bed is not performed by comparing the load value every moment, but the average value of the short time corresponding to the current load value, The bed leaving or staying is determined by comparing with the long-time average value corresponding to the long-time load value up to. For this reason, in patent document 1, the absolute precision of a load sensor becomes unnecessary. Moreover, there is an advantage that it is hard to be influenced by the judgment result with respect to the disturbance such as increase and decrease of the load by placing an object on the bed.

Further, in Patent Document 2, the safety of nursing and nursing care is improved by discriminating the state of a person using the biological information of the hospitalized resident etc. on the bedding such as a futon or bed, and the hospital admission. A bed departure alarm device is disclosed that is configured to quickly and accurately determine a person's bed leaving operation or a preparation operation for bed leaving and to warn of this.

Patent No. 4963101 gazette Patent No. 5027638 gazette

However, in the technology described in Patent Document 1 described above, it is necessary to determine the average value of the load values for a relatively long time in comparing the load for determining the state, and the bed or lift, etc. ) And the user can not immediately perform the state determination. In addition, if a load is placed on a bed or the like and removed, or if a bed mounted article such as a side rail mounted on a side frame of the bed is removed, an erroneous determination is made. There is a problem. In addition, initial settings for each user are required. Furthermore, since the state determination is performed by comparing the average values of the long and short time load values, an erroneous determination occurs when the user performs an operation such that the difference between the average values does not occur.

Moreover, in patent document 2, it is necessary to retrofit several sensors on a bed, and there exists a problem that the installation cost of this sensor is high. In addition, since it is necessary to retrofit a large number of sensors, it is not possible to determine the bed departure if the sensor and the bed can not be matched, such as the margin of the installation place of the sensors.

The present invention has been made in view of such problems, and the cost of equipment such as sensors is low, and when the condition of the user relative to the bed changes, it can be determined quickly, and the person and the object It is an object of the present invention to provide a state determination device in which the erroneous determination (the erroneous determination such as the determination of an object as a user) is prevented.

A state determination device according to the present invention includes a load sensor that detects a load applied to a bed of a bed, a load data acquisition unit that acquires load data representing the load detected by the load sensor, and biological information of a user Whether or not the user is present on the bed as the state of the user, based on the biological information data acquiring unit for acquiring biological information data representing the human body, and the load data and the biological information data. A determination unit is included.
The state determination device according to the present invention includes a load sensor for detecting a load acting on a bed of a bed, a load data acquisition unit for acquiring load data by inputting a load signal detected by the load sensor, and the load signal As a state of the user based on a biological information data acquisition unit that acquires biological information data representing biological information of the user by performing frequency analysis, for example, fast Fourier transform, and based on the load data and the biological information data And a determination unit that determines whether the user is on the bed.

According to the present invention, it is not necessary to retrofit a large-scale sensor, it is not necessary to collect data for a long time, and it is possible to quickly determine the condition of the user such as a patient on a bed such as a bed.
And according to the present invention, since a person and an object can be distinguished, an erroneous determination between the person and the object is prevented.

It is a schematic diagram which shows the state determination apparatus which concerns on 1st Embodiment. It is a block diagram showing a state judging device concerning a 1st embodiment. It is a functional block diagram for demonstrating operation | movement of the state determination apparatus which concerns on 1st Embodiment. It is a figure which shows a load signal. It is a figure which shows spectral distribution when performing a fast Fourier transformation (FFT) with respect to the weight signal of FIG. It is a figure which shows the signal of the alternating current component of the load signal of FIG. It is a figure which shows the biometric information data showing respiration among the signals of the alternating current component of the load signal of FIG. It is a figure which shows the biometric information data showing a heartbeat among the signals of the alternating current component of the load signal of FIG. It is a figure for demonstrating the whole of the system by which the state determination apparatus which concerns on 2nd Embodiment was applied. It is a block diagram which shows the structure of the state determination apparatus which concerns on 2nd Embodiment. It is a flowchart which shows operation | movement of the state determination apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating the whole of the system by which the state determination apparatus which concerns on 3rd Embodiment was applied. It is a block diagram which shows the structure of the state determination apparatus which concerns on 3rd Embodiment. It is a flowchart which shows operation | movement of the state determination apparatus which concerns on 3rd Embodiment.

First Embodiment
Hereinafter, embodiments of the present invention will be specifically described with reference to the attached drawings. As shown in FIG. 1, in the bed, the four corners of a rectangular base frame 1 are supported by

support legs

5 and 6, respectively, and these

support legs

5 and 6 can be moved by a caster. There is. A bed frame 2 on which a plurality of bottoms such as a back bottom, a waist bottom, and a leg bottom are placed on the base frame 1 is vertically movably supported by

columns

7 and 8. The base end 3 a of the cylinder of the actuator 3 is swingably connected to the base frame 1, and the tip 3 b of the piston of the actuator 3 is swingably connected to the bed frame 2. As a result, the bed frame 2 is vertically driven by the actuator 3 so that the height of the bed frame 2, that is, the height of the bed on which the bed user sleeps can be adjusted. ing. In the present embodiment, a load sensor 4 is interposed at the connection portion between the base end 3 a of the actuator 3 and the base frame 1, and the base frame 1 via the actuator 3 from the bed frame 2 (that is, bed). The load sensor 4 detects the load applied to the vehicle (load applied to the bed).

As shown in FIG. 2, the load signal detected by the load sensor 4 is input to the signal processing unit 10 for frequency analysis (the sensor signal input of FIG. 3). As shown in FIG. 3, the load signal of the load sensor 4 is amplified by a differential amplifier after removing low frequency noise by a high pass filter (HPF). Thereafter, the load signal is amplified by the gain adjustment amplifier whose amplification degree is adjusted by the gain adjustment switch circuit. The gain adjustment amplifier adjusts the gain to maximize the load signal within the working voltage. Thereafter, a low frequency filter (LPF), for example, extracts a relatively low frequency signal of 10 to 20 Hz as a load signal. Then, this low frequency signal is A / D converted into a digital signal. Next, the load signal is input to the load data acquisition unit 11, and the load data acquisition unit 11 acquires load data 12 corresponding to the load value. The load signal is also input from the signal processing unit 10 to the biological information data acquisition unit 13 (the biological signal filter in FIG. 3), and the biological information data acquisition unit 13 acquires the frequency response of the biological information data 14 described later. Be taken out (biosignal extraction in FIG. 3). The frequency response of the biological information data 14 represents biological information such as respiration and heart rate.

The biological information data acquisition unit 13 performs fast Fourier transform (FFT) on the load signal to perform frequency analysis. When the user's living body lies on the mattress placed on the bottom of the bed frame 2, micro-vibration appears in the load signal. When the load signal accompanied by the minute vibration is subjected to fast Fourier transform (FFT), biological information data 14 representing biological information such as the user's respiration and heart rate can be obtained as a change of the minute distance.

The load data 12 and the biological information data 14 are input to the determination unit 15, and the determination unit 15 determines the state of the user on the bed. That is, when the load data 12 exceeds a specific threshold in a state in which biological information data 14 including frequency responses representing biological information such as respiration and heart rate are detected, it is assumed that a living user is present on the bed It is judged. This threshold is, for example, 20 kg, which is an appropriate load as the weight of the user. When the load data 12 exceeds the threshold but the biometric information data 14 can not be received, it can be determined that the user's living body does not exist on the bed and that the luggage or the like is placed on the bed. In this manner, by combining the load data 12 and the biological information data 14, it is possible to determine the state of the user in the bed.

Further, in the present embodiment, since the load data 12 and the biological information data 14 are combined, initial setting is unnecessary. In addition, collection of load data 12 for a long time is not necessary in order to determine the state of the user in the bed. That is, after the load sensor 4 of the actuator 3 detects the fluctuation of the load signal, the state determination device of the present embodiment immediately starts the determination function. Then, it is possible to determine whether the fluctuation of the load is due to the user of the patient or the like or the object such as the luggage according to the biological information data 14, thereby preventing an erroneous determination. Also, no erroneous determination is made by the user of the bed no matter what the action is. That is, when it is going to detect a user's motion on a bed only with load data 12 like before, when a load change amount is small, or when disturbances, such as putting a load on a bed, occur. Although there is a possibility of an erroneous determination, in the present embodiment, since the condition of the user on the bed is determined in combination with the biological information data 14, the erroneous determination is prevented.

And in this embodiment, it is not necessary to install many sensors only by installing the load sensor 4 in the actuator 3 of a raising / lowering bed, and installation cost is low. Further, the load sensor 4 is originally incorporated in the bed in order to detect the bed load, and in the present embodiment, only the signal processing of the output signal is performed. Since there is no need to add it, there is no need to consider the consistency between the sensor and the device (the margin of the installation location).

In this embodiment, the load sensor 4 is provided on the bed frame lifting / lowering actuator 3 in the lifting bed, but the installation location of the load sensor 4 is not limited to this. However, in order to detect the user's biometric information data 14 on the bed mattress, it is preferable to install the load sensor 4 at the position where it contacts the bed frame 2 as much as possible. When the present invention is applied to a bed that performs a back-raising operation to raise the back and bottom, the load sensor 4 is provided to an actuator (not shown) for back-up and the measurement is performed by the load sensor 4 installed on this actuator. Load data 12 and biometric information data 14 can be acquired from the load signal.

[Supplement]
Here, the method of acquiring the load data 12 (load value) and the biological information data 14 (respiration, heart rate) from the load signal will be supplemented with reference to FIGS.

FIG. 4 is a diagram showing the load signal SG. The load signal SG represents the signal level detected by the load sensor 4 and includes a signal SG1 of a non-time-varying component (DC component) and a signal SG2 of a time-varying component (AC component). The signal SG1 of the DC component represents the value (load value) of the load (load applied to the bed) applied to the base frame 1 from the bed frame 2 (that is, the bed) via the actuator 3; , Referred to as load data D10 in FIG. Signal SG2 of the alternating current component corresponds to living body information data 14 (hereinafter referred to as living body information data D20 in FIG. 4).

FIG. 5 is a diagram showing a spectrum distribution when frequency analysis, for example, fast Fourier transform (FFT) is performed on the weight signal SG of FIG. 4. The spectral distribution includes a spectral component SC10 corresponding to the load data D10, a spectral component SC21 corresponding to the respiration of the biological information data D20, and a spectral component SC22 corresponding to the heartbeat of the biological information data D20. Spectral component SC10 represents the zero frequency and its neighboring components. Although the load signal SG is subjected to FFT, frequency analysis such as discrete Fourier transform (DFT) may be used other than FFT.

FIG. 6 is a diagram showing a signal SG2 of the AC component of the load signal SG of FIG. The signal SG2 of the alternating current component is obtained by cutting the spectral component SC10 (zero frequency) of FIG. 5 from the load signal SG of FIG. That is, the signal SG2 of the alternating current component is obtained by cutting the signal SG1 of the direct current component from the load signal SG of FIG. Here, normally, the signal SG1 of the direct current component is a signal originating in the living body, but when the signal SG2 of the alternating current component is absent, it means that the signal SG1 of the direct current component is not originating in the living body. That is, the load applied to the bed frame 2 (bed) means that it is not an object by the user but an object placed on the bed frame 2 (bed).

FIG. 7 is a diagram showing biological information data D21 representing respiration (for example, a cycle of 10 to 30 times per minute) in the signal SG2 of the alternating current component of the load signal SG of FIG. The biological information data D21 representing respiration is obtained by cutting the spectral component SC22 of FIG. 5 from the signal SG2 of the alternating current component.

FIG. 8 is a diagram showing biological information data D22 representing a heartbeat (for example, a cycle of 20 to 200 times per minute) in the signal SG2 of the alternating current component of the load signal SG of FIG. The biological information data D22 representing the heartbeat is obtained by cutting the spectral component SC21 of FIG. 5 from the signal SG2 of the alternating current component.

As described above, in the state determination device according to the first embodiment, the load sensor 4 detects the load applied to the bed (bed frame 2) of the bed as the load signal SG, and the load signal SG detected by the load sensor 4 From the load data acquisition unit 11 that acquires the load data 12 (load data D10) corresponding to the component SG1 that does not change with time and that represents the load, the time from the load signal SG detected by the load sensor 4 The biological information data acquisition unit 13 acquires biological information data 14 (biological information data D21 and / or biological information data D22) corresponding to the signal SG2 of the changing component and representing the user's biological information, and the load data 12 Based on (load data D10) and biological information data 14 (biological information data D21 and / or biological information data D22), As the state of use's, which includes a determination unit 15 whether the user is Zaiyuka the bed (bed frame 2), the. Specifically, determination unit 15 acquires both load data 12 (load data D10) and biological information data 14 (biometric information data D21 and / or biological information data D22), and load data 12 (load) If the value represented by the data D10) exceeds the threshold value, it is determined that the user is present in the bed (bed frame 2) as the state of the user. Thereby, in the state determination apparatus according to the first embodiment, as described above, the equipment cost of the sensor or the like can be low, and when the state of the user with respect to the bed changes, it can be determined quickly.

Here, when the biological information data 14 (the biological information data D21 and / or the biological information data D22) is acquired, but the load data 12 (the load data D10) can not be acquired, the user falls from the bed frame 2 (bed) It is expected to be on the verge of When load data 12 (load data D10) is acquired but biological information data 14 (biological information data D21 and / or biological information data D22) can not be acquired, heavy baggage is placed on bed frame 2 (bed). ing. For this reason, in the state determination device according to the first embodiment, since a person and an object are distinguished, it is possible to prevent an erroneous determination such as determining an object as a user.

Second Embodiment
In the state determination device according to the first embodiment, the load data 12 (load data D10 in FIG. 4) and the biological information data 14 (respiration in FIG. 7) from the load signal (load signal SG in FIG. 4) detected by the load sensor 4 Biological information data D21 representing H, and biological information data D22) representing the heartbeat in FIG. On the other hand, in the state determination device according to the second embodiment, the load data D10 is acquired from the load signal (load signal SG in FIG. 4) detected by the load sensor, and the biological information detected by the biological information sensor is used as the biological information data. Acquired as D1 and D2.

FIG. 9 is a diagram for explaining the entire system to which the state determination device 200 according to the second embodiment is applied. The state determination device 200 according to the second embodiment is provided in the bed 100.

The bed 100 includes a base frame 101, a bed frame 102, an actuator 103 (drive unit),

support legs

105 and 106, and

support posts

107 and 108.

One end and the other end of the base frame 101 are supported by

support legs

105 and 106, respectively. One end of the base frame 101 corresponds to the side (head side) to which the head of the user 300 faces when the user 300 sleeps on the bed 100. The other end of the base frame 101 corresponds to the side (foot side) to which the foot of the user 300 faces when the user 300 sleeps on the bed 100. The

support legs

105, 106 are supported by

castors

109, 110, respectively, and the bed 100 is movable by the

castors

109, 110.

One end of the

columns

107 and 108 is provided on the base frame 101, and the other end of the

columns

107 and 108 is provided on the bed frame 102. On the base frame 101, one ends of the

columns

107 and 108 are provided near the head and foot sides of the base frame 101, respectively. In the bed frame 102, the other ends of the

columns

107 and 108 are provided near the head and foot sides of the base frame 101, respectively. The

columns

107 and 108 are configured to allow the bed frame 102 to move up and down. On the bed frame 102, a plurality of bottoms (not shown) such as a back bottom, a waist bottom and a leg bottom of the bed 100 are placed.

The actuator 103 is a drive unit having a cylinder and a piston. The base end 103 a of the cylinder of the actuator 103 is swingably connected to the base frame 101. The tip end portion 103 b of the piston of the actuator 103 is swingably connected to the bed frame 102. The bed frame 102 is vertically driven by the actuator 103 vertically driving the

columns

107 and 108. That is, the height of the bed frame 102 (the height of the bed on which the user 300 of the bed 100 sleeps) is adjusted.

The state determination device 200 according to the second embodiment includes a main body 210 of the state determination device 200, a load sensor 310, and a biological information sensor 320.

The load sensor 310 is connected to the main body 210 of the state determination device 200 via a signal line. The load sensor 310 is a sensor capable of measuring a load. The load sensor 310 is interposed at a connecting portion between the base end portion 103 a of the actuator 103 and the base frame 101. The load sensor 310 detects a load applied to the base frame 101 from the bed frame 102 (that is, the bed) via the actuator 103 (load applied to the bed) as a load signal SG. Similar to the first embodiment, the load signal SG includes a signal SG1 of a non-time-varying component (DC component) and a signal SG2 of a time-varying component (AC component).

The biological information sensor 320 is connected to the main body 210 of the state determination device 200 via a signal line. The biological information sensor 320 is a sensor that can simultaneously measure respiration and heart rate. The biological information sensor 320 is provided on the bed frame 102 independently of the load sensor 310. For example, the mattress 120 is mounted on the bed frame 102, and the biological information sensor 320 is provided between the bed frame 102 and the mattress 120. Specifically, the biometric information sensor 320 is provided between the bed frame 102 and the mattress 120 so as to be provided under the chest of the user 300. For example, when the user 300 is on the mattress 120, the biological information sensor 320 detects biological information representing the blood pressure and the temperature of the user 300 as biological information B1 and B2, respectively.

The state determination device 200 according to the second embodiment is connected to another device (output destination 400) via a network. For example, as the output destination 400, the terminal device 410 and the portable terminal device 420 can be mentioned. The mobile terminal 420 is connected to the network via an access point (AP) 430.

The terminal device 410 is a terminal device provided in a nurse station or a management room. Even if the terminal device 410 is separated from the state determination device 200, staff (such as a nurse or assistance staff) of the nurse station or the management room can receive the state of the user 300 by receiving the determination result from the state determination device 200. (Abed or stay) can be grasped. The mobile terminal device 420 is, for example, a terminal device that can be connected to a LAN (Local Area Network) wirelessly. Even if the portable terminal device 420 is separated from the state determination device 200, staff (such as nurses or assistance staff) who are not present at the nurse station or the management room can receive the determination result from the state determination device 200. It is possible to grasp the state (bed up or stay).

FIG. 10 is a block diagram showing the configuration of the state determination device 200 according to the second embodiment. The main unit 210 of the state determination apparatus 200 includes a control unit 220, a storage unit 230, a drive control unit 240, a load data acquisition unit 250, a biological information data acquisition unit 260, a determination unit 270, an output unit 280. Is equipped.

The control unit 220 is a functional unit for controlling the entire state determination device 200. The control unit 220 implements various functions by reading and executing various computer programs (hereinafter referred to as programs) stored in the storage unit 230, and is configured by, for example, a CPU (Central Process Unit) or the like. ing.

The storage unit 230 is a functional unit in which various programs necessary for the operation of the state determination device 200 and various data are stored. The storage unit 230 is configured of, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. The storage unit 230 stores setting load data Dth10 representing a specific threshold value.

Here, the user 300 is provided with an operation unit (remote controller) (not shown) in order to use the bed 100. The operation unit is used when the user 300 or staff (such as a nurse or assisting staff) adjust the height of the bed frame 102 (the height of the bed on which the user 300 of the bed 100 sleeps).

The drive control unit 240 drives the actuator 103 (drive unit) via a signal line (see FIG. 9) so that the bed frame 102 is driven up and down according to the operation of the operation unit by the user 300 or the staff. Control).

The load data acquisition unit 250 uses the load signal SG detected by the load sensor 310 to represent the value (load value) represented by the signal SG1 (see FIG. 4) of the DC component (component not changing with time). Get as. The load data D10 may be obtained directly from the load signal SG instead of the signal SG1 of the direct current component.

The biological information data acquisition unit 260 acquires the biological information B1 and B2 (for example, blood pressure and body temperature) detected by the biological information sensor 320 as the aforementioned biological information data D1 and D2, respectively.

The determination unit 270 determines, based on the load data D10 and the biological information data D1 and D2, whether or not the user 300 is in the bed frame 102 (bed) as the state of the user 300. Specifically, when both the load data D10 and the biological information data D1 and D2 are acquired, and the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10, The determination unit 270 determines that the user 300 is on the bed frame 102 (sleeping) as the state of the user 300. Otherwise, the determination unit 270 determines that the user 300 has left the bed frame 102 (bed) as the state of the user 300.

The output unit 280 outputs the determination result of the determination unit 270 to the output destination 400 (terminal device 410, mobile terminal device 420). When the output destination 400 (the terminal device 410, the portable terminal device 420) receives the determination result from the state determination device 200, the staff (nurse, assistance staff, etc.) of the nurse station or the management room (Abed or stay) can be grasped.

FIG. 11 is a flowchart showing the operation of the state determination device 200 according to the second embodiment.

First, the determination unit 270 checks whether the load data acquisition unit 250 has acquired the load data D10 (step S201).

When the load data acquisition unit 250 has not acquired the load data D10 (No in step S201), no load is applied to the bed frame 102 (bed). In this case, step S201 is performed until the load data acquisition unit 250 acquires the load data D10.

On the other hand, when the load data acquisition unit 250 acquires the load data D10 (step S201-Yes), the load is applied to the bed frame 102 (bed). In this case, the determination unit 270 determines whether the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10 (step S202).

Here, when the value (load value) represented by the load data D10 does not exceed the value (threshold) represented by the set load data Dth10 (No in step S202), the load applied to the bed frame 102 (bed) is There is a possibility that the user 300 has left the bed while the light object is placed on the bed frame 102 (bed) instead of the user 300. In this case, the determination unit 270 determines bed departure as the state of the user 300, and generates a determination result indicating that the user 300 is out of bed (step S205). At this time, the output unit 280 outputs the determination result (the leaving of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S206).

Specifically, the output unit 280 outputs the determination result (the user's 300 leaving the floor) to the terminal device 410 of the nurse station or the management room to notify the user 300 that the user 300 has left the floor. Notify the staff (nurse, assistance staff, etc.) in the management room. The output unit 280 outputs the determination result (the user's 300 leaving the floor) to the portable terminal device 420 to notify that the user 300 is not at the floor, a staff (nurse or nurse) who is not at the management room. Assist staff etc.) Thereafter, step S201 is performed.

On the other hand, when the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10 (step S202-Yes), the determination unit 270 is added to the bed frame 102 (bed) The load may be from the user 300. In this case, the determination unit 270 checks whether or not the biological information data acquisition unit 260 acquires the biological information data D1 and D2 (step S203).

Here, when the biological information data acquisition unit 260 does not acquire the biological information data D1 and D2 (Step S203-No), the load applied to the bed frame 102 (bed) is not by the user 300, and There is a possibility that the user 300 leaves the bed while the heavy object is placed on the bed frame 102 (bed). In this case, the determination unit 270 determines bed departure as the state of the user 300, and generates a determination result indicating that the user 300 is out of bed (step S205). At this time, the output unit 280 outputs the determination result (the leaving of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S206).

On the other hand, when the biological information data acquisition unit 260 acquires the biological information data D1 and D2 (step S203-Yes), the load applied to the bed frame 102 (bed) is by the user 300, and the use The person 300 is on the bed frame 102 (sleeping bed). In this case, the determination unit 270 determines the presence of the floor as the state of the user 300, and generates a determination result indicating that the user 300 is present (step S204). At this time, the output unit 280 outputs the determination result (the floor of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S206).

Specifically, the output unit 280 outputs the determination result (the presence of the user 300) to the terminal device 410 of the nurse station or the management room, thereby indicating that the user 300 is present. Notify the staff (nurse, assistance staff, etc.) who are in the station or administration room. The output unit 280 outputs the determination result (the presence of the user 300) to the portable terminal device 420, so that the staff 300 who is not present at the nurse station or the management room can notify that the user 300 is present. Notify the teacher and the support staff etc. Thereafter, step S201 is performed.

As described above, in the state determination device according to the second embodiment, the time from the load sensor 310 for detecting the load applied to the bed (bed frame 102) of the bed 100 and the load signal SG detected by the load sensor 310 A load data acquisition unit 250 that acquires a signal SG1 of a component that does not change as the load data D10, a biological information sensor 320 that is provided on the bed 100 independently of the load sensor 310 and detects biological information of the user 300, a living body Based on the biological information data acquisition unit 260 that acquires the biological information detected by the information sensor 320 as biological information data D1 and D2, and based on the load data D10 and the biological information data D1 and D2, use as a state of the user 300 Determination unit 2 that determines whether the occupant 300 is on the bed (bed frame 102) 0, and includes an output section 280 for outputting a determination result of the determination unit 270 to the destination 400, a. Specifically, when both the load data D10 and the biological information data D1 and D2 are acquired and the value represented by the load data D10 exceeds the threshold, the determination unit 270 determines the user 300 as the state of the user 300. It is determined that 300 is on the bed (bed frame 102). Thus, in the state determination apparatus according to the second embodiment, as in the first embodiment, the equipment cost of the sensor or the like is low, and when the state of the user with respect to the bed changes, it is determined quickly. Can. In addition, since a person and an object are distinguished, it is possible to prevent an erroneous determination such as determining an object as a user.

The state determination device 200 according to the second embodiment further includes a second biological information data acquisition unit (not shown) in addition to the first biological information data acquisition unit (biological information data acquisition unit 260). May be In this case, the second biological information data acquisition unit acquires the signal SG2 of the AC component (the component that changes with time) from the load signal SG detected by the load sensor 310, and the biological information from the signal SG2 of the AC component. Data D21 and D22 are acquired. The determination unit 270 acquires the biological information data D1 and D2 and the biological information data D21 and D22 by the first biological information data acquisition unit (biological information data acquisition unit 260) and the second biological information data acquisition unit, respectively. When the value represented by the load data D10 exceeds the threshold (or, as in the first embodiment, the biometric information data D21 and D22 are acquired by the biometric information data acquiring unit 262, and the value represented by the load data D10 Determines that the user 300 is on the bed (bed frame 102) as the state of the user 300 (when the threshold exceeds the threshold).

Here, the biological information data D1 and D2 acquired from the first biological information data acquisition unit (biological information data acquisition unit 260) and the biological information data D21 and D22 acquired from the second biological information data acquisition unit May be different. For example, the biological information data D1 and D2 acquired from the first biological information data acquisition unit (biological information data acquisition unit 260) represent blood pressure and body temperature, respectively, and are acquired from the second biological information data acquisition unit. The biological information data D21 and D22 may represent breathing and heartbeat, respectively.

Further, the biological information data acquired from the first biological information data acquisition unit (biological information data acquisition unit 260) is not only blood pressure and body temperature but also respiration and heart rate in order to increase the determination accuracy of the state of the user 300. May be represented.

Third Embodiment
In the state determination device 200 according to the second embodiment, the biological information sensor 320 is provided between the bed frame 102 and the mattress 120. On the other hand, in the state determination device 200 according to the third embodiment, the biological information sensor 320 is provided in contact with or accompanying the user 300.

FIG. 12 is a diagram for describing the entire system to which the state determination device 200 according to the third embodiment is applied. The state determination device 200 further includes a wearable biometric information sensor unit 330. The wearable biometric information sensor unit 330 is attached to, for example, at least one of the torso, arms, feet, and neck of the user 300.

FIG. 13 is a block diagram showing the configuration of the state determination device 200 according to the third embodiment. In the state determination device 200, the wearable living body information sensor unit 330 includes the living body information sensor 320 described above and a wireless unit 332. The wireless unit 332 is, for example, a device capable of near field communication such as LAN or Bluetooth (registered trademark). The wearable living body information sensor unit 330 is detected by the living body information sensor 320 by near field communication of the wireless unit 332 even if it is separated from the bed 100 (specifically, the state determination device 200 provided in the bed 100). The biological information B1 and B2 (blood pressure and body temperature) can be transmitted to the state determination device 200.

Here, the wearable living body information sensor unit 330 transmits the living body information B1 and B2 (blood pressure and body temperature) to the state determination device 200 by the short distance wireless communication of the wireless unit 332, but the operation of the user 300 is hindered. If there is not, the biological information B1 and B2 (blood pressure, body temperature) may be transmitted to the state determination device 200 by a wired line (for example, a signal line).

In addition to the first biological information data acquisition unit (biological information data acquisition unit 260), the state determination device 200 according to the third embodiment also includes a second biological information data acquisition unit (biological information data acquisition unit 262). Furthermore, it possesses. The biological information data acquisition unit 262 acquires a signal SG2 of an alternating current component (a component that changes with time) from the load signal SG detected by the load sensor 310, and the biological information data D21 and D22 from the signal SG2 of the alternating current component. get.

Here, the biological information data D1 and D2 acquired from the biological information data acquisition unit 260 may be different from the biological information data D21 and D22 acquired from the biological information data acquisition unit 262. For example, the biological information data D21 and D22 acquired from the biological information data acquisition unit 260 represent blood pressure and body temperature, respectively, and the biological information data D21 and D22 acquired from the biological information data acquisition unit 262 respectively breathe and heart rate It may be represented.

Further, in order to increase the determination accuracy of the state of the user 300, the biological information data acquired from the biological information data acquisition unit 260 may represent not only blood pressure and body temperature but also respiration and heart rate.

FIG. 14 is a flowchart showing the operation of the state determination device 200 according to the third embodiment.

First, the determination unit 270 checks whether the biological information data acquisition unit 260 acquires the biological information data D1 and D2 from the wearable biological information sensor unit 330 (step S301).

For example, when the biological information data acquisition unit 260 does not acquire the biological information data D1 and D2 from the wearable biological information sensor unit 330 (step S301-No), the user 300 does not wear the wearable biological information sensor unit 330 It is a state. In this case, step S301 is executed until the biological information data acquisition unit 260 acquires the biological information data D1 and D2 from the wearable biological information sensor unit 330.

For example, even if the biological information data acquisition unit 260 acquires the biological information data D1 and D2 from the wearable biological information sensor unit 330, the load data acquisition unit 250 and the biological information data acquisition unit 262 from the load sensor 310 load data D10, When the biological information data D21 and D22 are not acquired (steps S301-Yes, S302-No), the user 300 is in the state of leaving the bed 100. Alternatively, the user 300 may have been in the bed 100, but soon the user 300 may have left the bed.

In this case, the determination unit 270 determines bed departure as the state of the user 300, and generates a determination result indicating that the user 300 is out of bed (step S305). At this time, the output unit 280 outputs the determination result (the leaving of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S306).

Specifically, the output unit 280 outputs the determination result (the user's 300 leaving the floor) to the terminal device 410 of the nurse station or the management room to notify the user 300 that the user 300 has left the floor. Notify the staff (nurse, assistance staff, etc.) in the management room. The output unit 280 outputs the determination result (the user's 300 leaving the floor) to the portable terminal device 420 to notify that the user 300 is not at the floor, a staff (nurse or nurse) who is not at the management room. Assist staff etc.) Thereafter, step S301 is performed.

Meanwhile, the biological information data acquisition unit 260 acquires the biological information data D1 and D2 from the wearable biological information sensor unit 330, and the load data acquisition unit 250 and the biological information data acquisition unit 262 from the load sensor 310 load data D10, a living body When the information data D21 and D22 are acquired (steps S301-Yes, S302-Yes), the user 300 is in the bed 100. In this case, the determination unit 270 determines whether the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10 (step S303).

Alternatively, even if the biological information data acquisition unit 260 does not acquire the biological information data D1 and D2 from the wearable biological information sensor unit 330, the load data acquisition unit 250 and the biological information data acquisition unit 262 receive load data from the load sensor 310. In the case where D10 and biometric information data D21 and D22 are acquired (steps S301-Yes, S302-Yes), the user 300 wears the wearable biometric information sensor unit 330 while the user 300 is in the bed 100. It is in the removed state. Even in this case, the determination unit 270 determines whether the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10 (step S303).

Here, when the value (load value) represented by the load data D10 does not exceed the value (threshold) represented by the set load data Dth10 (No in step S303), the load applied to the bed frame 102 (bed) is There is a possibility that the user 300 has left the bed while the light object is placed on the bed frame 102 (bed) instead of the user 300. In this case, the determination unit 270 determines bed departure as the state of the user 300, and generates a determination result indicating that the user 300 is out of bed (step S305). At this time, the output unit 280 outputs the determination result (the leaving of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S306).

On the other hand, when the value (load value) represented by the load data D10 exceeds the value (threshold) represented by the set load data Dth10 (step S303-Yes), the load applied to the bed frame 102 (bed) is used The user 300 is on the bed frame 102 (sleeping bed). In this case, the determination unit 270 determines the presence of the floor as the state of the user 300, and generates a determination result indicating that the user 300 is present (step S304). At this time, the output unit 280 outputs the determination result (the floor of the user 300) to the output destination 400 (the terminal device 410, the portable terminal device 420) (step S306).

Specifically, the output unit 280 outputs the determination result (the presence of the user 300) to the terminal device 410 of the nurse station or the management room, thereby indicating that the user 300 is present. Notify the staff (nurse, assistance staff, etc.) who are in the station or administration room. The output unit 280 outputs the determination result (the presence of the user 300) to the portable terminal device 420, so that the staff 300 who is not present at the nurse station or the management room can notify that the user 300 is present. Notify the teacher and the support staff etc. Thereafter, step S301 is performed.

As described above, in the state determination device according to the third embodiment, the time from the load sensor 310 for detecting the load applied to the bed (bed frame 102) of the bed 100 and the load signal SG detected by the load sensor 310 The load data acquisition unit 250 acquires the signal SG1 of the component that does not change as the load data D10, the biological information sensor 320 mounted on the user 300 and detecting the biological information of the user 300, and the biological information sensor 320 A biological information data acquiring unit 260 for acquiring biological information as biological information data D1 and D2 and a living body for acquiring a signal SG2 of a time-varying component as biological information data D21 and D22 from a load signal SG detected by the load sensor 310. Information data acquisition unit 262, load data D10 and biometric information data D1, As a state of the user 300 based on the second, D21, and D22, a determination unit 270 that determines whether the user 300 is on the bed (bed frame 102) and a determination result of the determination unit 270 And an output unit 280 configured to output to an output destination 400. Specifically, in the determination unit 270, the biological information data D1, D2 and the biological information data D21, D22 are respectively acquired by the biological information data acquisition unit 260 and the biological information data acquisition unit 262 (or similar to the first embodiment) In the case where the biological information data D21 and D22 are acquired by the biological information data acquisition unit 262) and the value represented by the load data D10 exceeds the threshold, the user 300 sleeps (bed It is determined that a frame 102) is present. Thereby, in the state determination apparatus according to the third embodiment, as in the first embodiment, the equipment cost of the sensor or the like is low, and when the state of the user with respect to the bed changes, it is determined quickly Can.

Here, when a heavy load is placed on the bed frame 102 (bed) when the user 300 leaves the bed, an erroneous determination may be made such that an object is determined as the user. Therefore, in the determination unit 270, the biological information data D1, D2 and the biological information data D21, D22 are acquired by the biological information data acquisition unit 260 and the biological information data acquisition unit 262, respectively, and the value represented by the load data D10 is a threshold. If it exceeds (or, as in the first embodiment, the biological information data D21, D22 is acquired by the biological information data acquisition unit 262, and the value represented by the load data D10 exceeds the threshold), use As the state of the person 300, it is determined that the user 300 is in the bed frame 102 (sleeping). For this reason, in the state determination device according to the third embodiment, it is possible to prevent an erroneous determination such as determining an object as a user.

[Modification]
As described above, the present invention is not limited to the above-described embodiment, and various modifications are possible. That is, embodiments obtained by combining appropriately modified technical means are also included in the technical scope of the present invention.

For example, in the state determination device 200 according to the second and third embodiments, the load data acquisition unit 310 is provided in the actuator 103, but if the load data D10 can be acquired, the base frame 101, the bed frame 102, and the

support

107, 108,

caster

109, 110 etc. may be provided. Further, as long as the load data D10 can be acquired, a weight scale may be provided on the bed 100 instead of the load sensor 310.

In the state determination apparatus 200 according to the third embodiment, if the biological information data acquisition unit 262 can acquire the biological information data D21 and D22 from the load sensor 310 in step S302 in FIG. May be skipped to step S304 of FIG.

Further, in the state determination apparatus 200 according to the third embodiment, steps S201 to S206 in FIG. 11 in the second embodiment may be performed after step S301 in FIG.

1: Base frame 2: Bed frame 3: Actuator 3 a: Base end 3 b: Tip 4: Sensor (load sensor)
5: Support leg 6: Support leg 7: Support 8: Support 10: Signal processing unit 11: Load data acquisition unit 12: Load data 13: Biological information data acquisition unit 14: Biological information data 15: Judgment unit 100: Bed 101: Bed 101: Foundation frame 102: Bed frame (sleeping)
103: Actuator (drive unit)
103a: base end 103b: tip 105: support leg 106: support leg 107: support 108: support 109: caster 110: caster 200: state determination device 210: main body 220: control unit 230: storage unit 240: drive control Unit 250: load data acquisition unit 260: biometric information data acquisition unit 262: biometric information data acquisition unit 270: determination unit 280: output unit 300: user 310: load sensor 320: biometric information sensor 330: wearable biometric information sensor unit 332 : Wireless unit 400: Output destination 410: Terminal device 420: Mobile terminal device 430: Access point (AP)
B1: Biological information (blood pressure)
B2: Biological information (body temperature)
D1: Biological information data (blood pressure)
D2: Biometric data (body temperature)
D10: Load data D20: Biological information data D21: Biological information data (respiration)
D22: Biological information data (heart rate)
SC10: Spectral component SC21: Spectral component SC22: Spectral component SG: Load signal SG1: Signal (DC component)
SG2: Signal (AC component)

Claims

A load sensor that detects the load applied to the bed of the bed;
A load data acquisition unit that acquires load data representing the load detected by the load sensor;
A biometric information data acquisition unit that acquires biometric information data representing a user's biometric information;
A determination unit that determines whether the user is on the bed as the state of the user based on the load data and the biological information data;
A state determination apparatus comprising:
When the determination unit acquires both the load data and the biological information data, and the value represented by the load data exceeds a threshold, the user is on the bed as the state of the user. The state determination device according to claim 1, wherein the state determination device determines that the user is doing.
An output unit that outputs the determination result of the determination unit to an output destination;
The state determination device according to claim 1, further comprising:
The load sensor detects a load applied to the bed as a load signal.
The load data acquisition unit acquires, as the load data, a signal of a component that does not change with time, from the load signal detected by the load sensor.
The said biometric information data acquisition part acquires the signal of the component which changes with time from the said load signal detected by the said load sensor as said biometric information data, It is characterized by the above-mentioned. State determination apparatus as described.
A biological information sensor provided on the bed independently of the load sensor and detecting the biological information of the user;
Further equipped,
The state determination apparatus according to any one of claims 1 to 4, wherein the biological information data acquisition unit acquires the biological information detected by the biological information sensor as the biological information data.
A biological information sensor which is attached to the user and detects the biological information of the user;
Further equipped,
The state determination apparatus according to any one of claims 1 to 4, wherein the biological information data acquisition unit acquires the biological information detected by the biological information sensor as the biological information data.
A load sensor that detects the load acting on the bed of the bed;
A load data acquisition unit that receives a load signal detected by the load sensor and acquires load data;
A biological information data acquisition unit that performs frequency analysis on the load signal to acquire biological information data representing biological information of the user;
A determination unit that determines whether the user is on the bed as the state of the user based on the load data and the biological information data;
A state determination apparatus comprising: