JP6767193B2 - Physical condition monitoring system - Google Patents

Description

The present invention relates to a physical condition monitoring system that monitors a physical condition using a load detector.

In the nursing of inpatients in hospitals and the care of residents of nursing care facilities, nurses and long-term care indicate that patients and care recipients cannot control their own excretion, or that urine leaks or excretes on the bed. You may not be able to tell the person yourself. As an excretion detection device that can be used in such a case, the devices described in Patent Document 1 and Patent Document 2 have been proposed.

Patent Document 1 discloses a urination detection device in which a capacitance sensor is built in a diaper or a urine collecting pad, and the presence of urination by the capacitance sensor and the amount of urination are detected. In Patent Document 2, an intake fan is provided on the lower surface of the bed near the center of the bed, and the air taken in by the intake fan is measured by an odor sensor and a humidity sensor to detect whether the diaper is wet or not and the type of excrement. The excrement detection device to be used is disclosed.

Japanese Unexamined Patent Publication No. 2016-47480 Japanese Unexamined Patent Publication No. 2014-33745

Since the urination detection device disclosed in Patent Document 1 uses a sensor built in a diaper or a urine absorbing pad, it cannot be used for a subject who is not wearing a diaper or the like. Further, the excretion detection device disclosed in Patent Document 2 may not perform appropriate detection when the subject excretes at a position different from the installation position of the intake fan.

Therefore, the present invention is a physical condition monitoring system that does not require any special device or instrument to be attached to the subject's body and can detect the subject's urine leakage, excretion, etc. regardless of where the subject is located on the bed. The purpose is to provide.

According to the first aspect of the present invention,
A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separator that separates the respiratory component that vibrates according to the subject's breathing from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's respiratory center of gravity based on the respiratory component.
Provided is a physical condition monitoring system including a physical condition determination unit that determines a subject's physical condition based on a comparison between the position of the overall center of gravity and the position of the respiratory center of gravity.

In the physical condition monitoring system of the first aspect, the magnitude of the load applied to the bed when the position of the total center of gravity and the position of the respiratory center of gravity coincide with each other, and the position of the total center of gravity and the respiratory center of gravity. A load comparison unit may be further provided to compare the magnitude of the load applied to the bed at a time after the position is displaced.

According to the second aspect of the present invention,
A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separation unit that separates the heartbeat component that vibrates according to the subject's heartbeat from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's heartbeat center of gravity based on the heartbeat component.
Provided is a physical condition monitoring system including a physical condition determination unit that determines a physical condition of a subject based on a comparison between the position of the overall center of gravity and the position of the heartbeat center of gravity.

The physical condition monitoring system of the second aspect includes the magnitude of the load applied to the bed when the position of the total center of gravity and the position of the heartbeat center of gravity coincide with each other, and the position of the total center of gravity and the heartbeat center of gravity. A load comparison unit may be further provided to compare the magnitude of the load applied to the bed at a time after the position is displaced.

In the physical condition monitoring system of the first and second aspects, the physical condition of the subject to be determined may be the presence or absence of excretion by the subject.

The physical condition monitoring system of the present invention does not require any special device or instrument to be attached to the subject's body, and can detect urine leakage, excretion, etc. of the subject no matter where the subject is located on the bed. ..

FIG. 1 is a block diagram showing a configuration of a physical condition monitoring system according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the arrangement of the load detector with respect to the bed. FIG. 3 is a flowchart showing a physical condition determination method according to the embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of the physical condition determination unit 33. FIG. 5 is a flowchart showing the details of the physical condition determination process. FIG. 6 is a block diagram showing the overall configuration of the bed system according to the modified example.

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS. 1 to 5.

As shown in FIG. 1, the physical condition monitoring system 100 of the present embodiment mainly includes a load detection unit 1, a control unit 3, a storage unit 4, and a display unit 5. The load detection unit 1 and the control unit 3 are connected via an A / D conversion unit 2. A notification unit 6 and an input unit 7 are further connected to the control unit 3.

The load detection unit 1 includes four load detectors 11, 12, 13, and 14. Each of the load detectors 11, 12, 13, and 14 is a load detector that detects a load using, for example, a beam-shaped load cell. Such load detectors are described, for example, in Japanese Patent No. 4829020 and Japanese Patent No. 4002905. The load detectors 11, 12, 13, and 14 are each connected to the A / D conversion unit 2 by wiring.

The four load detectors 11, 12, 13, and 14 of the load detector 1 are arranged under the legs of the bed used by the subject. Specifically, the load detectors 11, 12, 13, and 14 are located under the casters C ₁ , C ₂ , C ₃ , and C ₄ attached to the lower ends of the legs at the four corners of the bed BD, as shown in FIG. Each is placed.

The A / D conversion unit 2 includes an A / D converter that converts an analog signal from the load detection unit 1 into a digital signal, and is connected to the load detection unit 1 and the control unit 3 by wiring, respectively.

The control unit 3 is a dedicated or general-purpose computer, and has a signal separation unit (load separation unit) 31, a center of gravity position calculation unit 32, and a physical condition determination unit 33 built therein.

The storage unit 4 is a storage device that stores data used in the physical condition monitoring system 100, and for example, a hard disk (magnetic disk) can be used. The display unit 5 is a monitor such as a liquid crystal monitor that displays the information output from the control unit 3 to the user of the physical condition monitoring system 100.

The notification unit 6 includes a device that aurally performs a predetermined notification based on information from the control unit 3, for example, a speaker. The input unit 7 is an interface for performing a predetermined input to the control unit 3, and may be a keyboard and a mouse.

As shown in FIG. 3, the physical condition of the subject using the physical condition monitoring system 100 is monitored in the load detection step S1 for detecting the load applied on the bed BD, the load that fluctuates from the detected load according to the subject's breathing. Signal separation step S2 to separate the components, the position of the total center of gravity (details will be described later) is obtained using the load applied on the bed BD, and the position of the respiratory center of gravity (details will be described later) is obtained using the separated load components. The position calculation step S3 includes the physical condition determination step S4 for determining the physical condition of the subject based on the obtained position of the total center of gravity and the position of the respiratory center of gravity, and the display step S5 for displaying the determined physical condition of the subject on the display unit 5. ..

[Load detection process]
In the load detection step S1, load detectors 11, 12, 13, and 14 are used to detect the load applied on the bed BD. This load is all the load applied on the bed BD, and includes not only the load of the subject S but also the load applied to the upper surface of the bed BD by a person other than the subject S, luggage, or the like. The load of an object (for example, bedding, a fall prevention fence, etc.) that is always provided on the upper surface of the bed BD is canceled in advance.

Since the load detectors 11, 12, 13 and 14 are arranged under the casters C ₁ , C ₂ , C ₃ and C ₄ as described above, the load applied to the upper surface of the bed BD is four loads. The detectors are distributed and detected in 11, 12, 13, and 14.

Each of the load detectors 11, 12, 13 and 14 detects the load (load change) and outputs it as an analog signal to the A / D converter 2. The A / D conversion unit 2 converts an analog signal into a digital signal with a sampling period of, for example, 5 milliseconds, and outputs the digital signal to the control unit 3. Hereinafter, the load signals output from the load detectors 11, 12, 13, and 14 and digitally converted by the A / D converter 2 are referred to as load signals s ₁ , s ₂ , s ₃ , and s ₄ , respectively.

[Signal separation process]
In the signal separation step S2, the signal separation unit 31 receives a load component (hereinafter referred to as “respiratory component”) s ₁₁ that fluctuates according to the respiration of the subject S from the load signals s ₁ , s ₂ , s ₃ , and s _4. , S ₂₁ , s ₃₁ , and s ₄₁ are separated.

First, the signal separation unit 31 performs Fourier analysis on at least one of the load signals s _{1 to} s ₄ to obtain a frequency spectrum in a frequency band corresponding to the respiration of the subject S. Since the number of human breaths is about 12 to 20 times per minute, the frequency of breathing is about 0.2 to 0.33 Hz. Therefore, for example, in the frequency spectrum of the frequency band of 0.1 Hz to 0.35 Hz, the frequency peak appears at the position corresponding to the respiration frequency of the subject S. From the position of this frequency peak, the respiratory frequency ν ₁ of the subject S is specified.

Next, the signal separation unit 31 receives components (that is, respiratory components s ₁₁ , s ₂₁ , s ₃₁ , s ₄₁₎ that fluctuate at the specified respiratory frequency ν ₁ from each of the load signals s ₁ , s ₂ , s ₃ , and s _4. ) Is separated and taken out. The respiratory component is extracted, for example, by performing bandpass filtering on each of the load signals s _{1 to} s ₄ . After that, the signal separation unit 31 outputs the extracted respiratory components s ₁₁ , s ₂₁ , s ₃₁ , and s ₄₁ to the center of gravity position calculation unit 32.

[Center of gravity position calculation process]
In the center of gravity position calculating step S3, the center of gravity position calculating unit 32 calculates the position of the respiratory center of gravity G ₁ position and the subject S of the total center-of-gravity G.

The total center of gravity G is a center of gravity calculated by using the load signals s _{1 to} s ₄ as they are, and is a synthetic center of gravity of all the elements that apply a load to the upper surface of the bed BD. Therefore, if the element that applies the load to the upper surface of the bed BD is only the subject S, the total center of gravity G coincides with the center of gravity of the subject S, but if more luggage or the like is placed on the upper surface of the bed BD, the total center of gravity G is It represents the combined center of gravity of the center of gravity of subject S and the center of gravity of luggage or the like.

The respiratory center of gravity G ₁ of the subject S is the center of gravity calculated by using the respiratory components s _{11 to} s ₄₁ that fluctuate with the respiratory frequency ν ₁ of the subject S among the load signals s _{1 to} s ₄ . Even if there is an element other than the subject S that applies a load to the upper surface of the bed BD, the element other than the subject S breathes because the load component applied by such an element does not fluctuate at the respiration frequency ν ₁ of the subject S. It does not affect the components s _{11 to} s ₄₁ . Therefore respiratory center of gravity G ₁ calculated by using the respiratory component s ₁₁ ~s ₄₁ is moved and the subject S, change of weight balance in the body of the subject S, varies only in accordance with the change of the subject S.

Position of the overall center-of-gravity G, and the calculation of the position of the respiratory center of gravity G ₁ is performed by the following operation.

XY coordinates are set on the bed BD as shown in FIG. 2, and the coordinates of the load detectors 11, 12, 13, 14 are set to (X ₁₁ , Y ₁₁ ), (X ₁₂ , Y ₁₂ ), and (X ₁₃ ), respectively. , Y ₁₃ ), (X ₁₄ , Y ₁₄ ), and the load detection values of the load detectors ₁₁ , ₁₂ , ₁₃ , and ₁₄ , are W ₁₁ , W ₁₂ , W ₁₃ , and W ₁₄ , respectively, and the load is applied on the bed BD. The position G (X, Y) of the center of gravity of the element to be added is calculated by the following equation.

Here, the load detection values W ₁₁ , W ₁₂ , W ₁₃ , and W ₁₄ of the load detectors ₁₁ , ₁₂ , ₁₃ , and ₁₄ are set for each sampling time of the load signals s ₁ , s ₂ , s ₃ , and s ₄ . By using the output value, the position of the total center of gravity G for each sampling time is calculated. Similarly, by using the output values of the respiratory components s ₁₁ , s ₂₁ , s ₃₁ , and s ₄₁ for each sampling time as the detected values W ₁₁ , W ₁₂ , W ₁₃ , and W ₁₄ , the respiratory center of gravity for each sampling time is used. The position of G ₁ is calculated. Position and the position of the respiratory center of gravity G ₁ of the entire obtained center of gravity G is stored in the storage unit 4.

[Physical condition determination process]
In physical state determining step S4, a body state determination unit 33, based on a comparison between the position of the total center-of-gravity G and the position of the respiratory center of gravity G _1, it determines the physical condition of the subject S. In the present specification and the present invention, the determination of the physical condition means the determination of whether or not the subject has discharged some object from the body to the outside of the body, and specifically, for example, excretion (including urine leakage). , Vomiting, bleeding, etc.

The determination of the physical condition of the subject S by the physical condition determination unit 33 is performed based on the following principle.

Since the total center of gravity G calculated in the center of gravity position calculation step S3 is the synthetic center of gravity of all the elements that apply a load to the upper surface of the bed BD, when a person other than the subject S (for example, a visitor) sits on the bed BD, or It also changes when luggage is placed. On the other hand, the respiratory center of gravity G ₁ of the subject S is a center of gravity calculated using the respiratory components s _{11 to} s ₄₁ that fluctuate with the respiratory frequency ν ₁ of the subject S, and is affected by visitors and luggage other than the subject S. Therefore, it does not fluctuate even when the load due to these is applied to the upper surface of the bed BD.

Here, when elements by applying a load to the upper surface of the bed BD is only subject S is coincident with the position of the respiratory center of gravity G ₁ position and the subject S of combined center of gravity G. Here, if the subject S urinates, for example, urine, which is an inanimate object different from the subject S, appears on the upper surface of the bed BD. Therefore, the position of the synthetic center of gravity G changes due to the load of urine, which is an inanimate object different from the subject S.

In addition, the urination of the subject S removes the urine existing in the body (inside the bladder) of the subject S. Accordingly, the position of the respiratory center of gravity G ₁ is varied by a certain weight has been localized to a part of the body of the subject S is removed.

That is, when the subject S is discharged to the outside of the urine (or other object) from the body, the position of the whole was consistent center of gravity G, the deviation between the position of the respiratory center of gravity G ₁ occurs. The physical condition determination unit 33 determines that the subject S has excreted or the like based on the occurrence of this deviation.

As shown in FIG. 4, the physical condition determination unit 33 has a center of gravity position comparison unit 331 and a load comparison unit 332. As shown in FIG. 5, the physical condition determination step S4 includes a center of gravity position comparison step S41 and a load comparison step S42.

In the center of gravity position comparison step S41, the center of gravity position comparison unit 331, it compares the position of the overall center-of-gravity G and the position of the respiratory center of gravity G _1. Gravity position comparator 331, if it is determined that the position of the overall center-of-gravity G and the position of the respiratory center of gravity _{G 1} is different (S41: Yes), the load comparing step S42 is executed. On the other hand, the center-of-gravity position comparator unit 331, when it is determined that the position of the overall center-of-gravity G and the position of the respiratory center of gravity G ₁ is consistent: The (S41 No), is repeated barycentric position comparison step S41 again.

In the load comparison step S42, the load comparison unit 332 receives the total load P2 applied to the upper surface of the bed BD when (or after) the position of the total center of gravity G and the position of the respiratory center of gravity G ₁ deviate from each other. premeasured and stored in the storage unit 4, it compares the total load P1 which has been added to the upper surface of the bed BD before a shift in the position of the overall center-of-gravity G and the position of the respiratory center of gravity G ₁ is caused.

When the total load P2 and the total load P1 match, the physical condition determination unit 33 determines that the subject S has excreted or the like, and ends the physical condition determination step S4. On the other hand, when the total load P2 is larger than the total load P1, it is determined that a load due to some external element is applied to the upper surface of the bed BD, and when the total load P2 is smaller than the total load P1, some abnormality occurs. It is determined that it has occurred, and the physical condition determination step S4 is completed.

[Display process]
In the display step S5, the control unit 3 displays the result of the determination in the physical condition determination unit 33 on the display unit 5. The display is performed, for example, by displaying character information or a symbol mark. When the subject S excretes or the like, the notification unit 6 may be used to perform voice notification.

The effects of the physical condition monitoring system 100 of this embodiment are summarized below.

Physical condition monitoring system 100 of the present embodiment, by urine or the like that was in the body of the subject S is discharged to the outside of the subject S, it is shifted to the whole center of gravity G that were in the same position and the breathing center of gravity G ₁ focusing occurring point, based on whether the deviation between the overall center of gravity G in the respiratory center of gravity G ₁ is caused, it is determined the occurrence of excretion. Therefore, it is not necessary to attach any special device or instrument to the body of the subject, and the excretion of the subject can be detected no matter where the subject is located on the bed.

Physical condition monitoring system 100 of the present embodiment, compared to the total load P1 before the deviation occurs between the overall center of gravity G and respiratory center of gravity G _1, and a total load P2 after shift occurs, it matches If this happens, it is judged that excretion has occurred. In this way, by adding a judgment based on the total load applied to the upper surface of the bed BD, the reliability of monitoring can be further improved.

<Modification example>

In physical condition monitoring system 100 of the above embodiments may be used cardiac center of gravity G ₂ in place of the respiratory center of gravity G _1. The heartbeat center of gravity G ₂ of the subject S is a load component (hereinafter, “heartbeat component”) s ₁₂ to which fluctuates depending on the frequency of the heartbeat of the subject S (hereinafter, “heartbeat frequency ν ₂ ”) among the load signals s _{1 to} s _4. It is the center of gravity calculated using s ₄₂ . Even if there is an element other than the subject S that applies a load to the upper surface of the bed BD, the load component applied by such an element does not fluctuate at the heart rate frequency ν ₂ of the subject S, so that the element other than the subject S is the heartbeat. It does not affect the components s _{12 to} s ₄₂ . Therefore, the heartbeat center of gravity G ₂ calculated by using the heartbeat components s _{12 to} s ₄₂ fluctuates only based on the change of the subject S such as the movement of the subject S and the change of the weight balance in the body of the subject S.

If the subject S has performed excretion, etc., for the same reason as shift occurs between the position location and the respiratory center of gravity G ₁ of the overall center of gravity G, also between the overall center of gravity G and heart center of gravity G ₂ There will be a gap. Therefore, even when replacing the respiratory center of gravity G ₁ to heartbeat centroid G _2, it is possible to determine the same in the case of using breathing centroid G _1.

If done using a heart centroid _{G 2} determined physical condition of the subject S, the signal separation step S2, the signal separating unit 31, from the load signal _{s 1, s 2, s 3} , s 4, heart rate component of the subject S Separate s ₁₂ , s ₂₂ , s ₃₂ , and s ₄₂ . Separation of heart rate components s ₁₂ , s ₂₂ , s ₃₂ , s ₄₂ is performed in the same manner as separation of respiratory components s ₁₁ , s ₂₁ , s ₃₁ , s ₄₁ , but the heart rate frequency is about 0.5 to 3.3 Hz. Therefore, for example, a frequency spectrum in a frequency band of 0.5 Hz to 3.5 Hz is obtained, and the heartbeat frequency ν _{2 of the} subject S is specified from the position of the frequency peak included in this frequency spectrum. Next, the signal separation unit 31 separates and takes out the heartbeat components s ₁₂ , s ₂₂ , s ₃₂ , and s ₄₂ from each of the load signals s ₁ , s ₂ , s ₃ , and s ₄ by bandpass filtering, and positions the center of gravity. calculator 32 calculates the heart center of gravity _{G 2} using a heartbeat component _{s 12, s 22, s 32} , s 42.

In physical condition monitoring system 100 of the above embodiment, the condition determining unit 33, based on the deviation between the position of the total center-of-gravity G and the position of the respiratory center of gravity G ₁ or heart center of gravity G ₂ exceeds a predetermined value It may be determined that excretion or the like has occurred. Further, the condition judging unit 33 estimates the quantity and amount of bleeding size excrement and vomit based on of deviation between the position of the total center-of-gravity G and the position of the respiratory center of gravity G ₁ or heart center of gravity G ₂ You may.

The physical condition monitoring system 100 of the above embodiment does not have to have the load comparison unit 34. In this case, it is determined physical condition based on only the comparison between the position of the total center-of-gravity G and the position of the respiratory center of gravity G ₁ or heart centroid G _2.

In the case element applies a load to the upper surface of the bed BD is only subject S, and the position of the overall center-of-gravity G, in the above embodiment as the position or the position of the heart center of gravity G ₂ respiratory center of gravity G ₁ is coincident Although the explanation was given, the two may not match depending on the subject or the measurement conditions. In that case, the deviation between the position of the total center of gravity G and the position of the respiratory center of gravity G ₁ or the position of the heartbeat center of gravity G ₂ that occurs when the element that applies the load to the upper surface of the bed BD is only the subject S. After the correction, the step described above may be performed. Alternatively, the position of the overall center-of-gravity G, based on the fact that the distance between the position or location of the heart center of gravity G ₂ respiratory center of gravity G ₁ has changed, it may be determined that the excretion such as the subject S.

In physical condition monitoring system 100 of the embodiment snare is deviation of a state of the overall center of gravity G and respiratory center of gravity G _{1 (or} heart center of gravity G ₂₎ of the subject S (shift direction, shift amount, shift speed, etc.), excretion , Urine leakage, bleeding, vomiting, etc., and reference data associated with each may be stored in the storage unit 4. In this case, the physical condition determination unit 233 can determine whether the subject has excretion, urine leakage, prolonged bleeding, or vomiting by referring to the reference data of the storage unit 4. it can. Alternatively, the physical condition monitoring system 100 may be configured as an excretion detection monitoring system used for the subject S who is not expected to experience vomiting or bleeding and only needs to detect excretion (including urine leakage).

In the above embodiment, the load detectors 11, 12, 13 and 14 are not limited to the load sensor using the beam type load cell, and for example, a force sensor can also be used.

In the above embodiment, the number of load detectors is not limited to four. Five or more load detectors may be used with additional legs on the bed BD. Alternatively, the load detector may be placed on only three of the legs of the bed BD. Even when there are three load detectors, the position G of the center of gravity of the subject S on the bed BD surface can be detected unless they are arranged in a straight line.

In the above embodiment, the load detectors 11, 12, 13 and 14 are arranged under the casters C ₁ , C ₂ , C ₃ and C ₄ attached to the lower ends of the legs of the bed BD, respectively. Not limited to this. The load detectors 11, 12, 13 and 14, respectively, may be provided between the four legs of the bed BD and the floor plate of the bed BD, or the four legs of the bed BD may be vertically split. For example, it may be provided between the upper leg and the lower leg. Further, the load detectors 11, 12, 13 and 14 may be integrated with the bed BD to form a bed system BDS including the bed BD and the physical condition monitoring system 100 of the present embodiment (FIG. 6). In the present specification, the "load detector provided on the bed" refers to the load detector provided between the four legs of the bed BD and the floor plate of the bed BD as described above, or the upper leg. It means a load detector provided between the lower leg and the lower leg.

In the above embodiment, a signal amplification unit that amplifies the load signal from the load detection unit 1 and a filtering unit that removes noise from the load signal may be provided between the load detection unit 1 and the A / D conversion unit 2. good.

In the physical condition monitoring system 100 of the above embodiment, the display unit 5 is not limited to displaying information on the monitor so that the user can visually recognize it. For example, the display unit 5 may be a printer that prints and outputs the physical condition, or may display the display unit using a simple visual expression such as turning on a lamp when excretion occurs. Alternatively, the display unit 5 may convey the physical condition by voice. Further, the physical condition monitoring system 100 does not have to have the display unit 5, and may only have an output terminal for outputting information. A monitor (display device) or the like for displaying is connected to the physical condition monitoring system 100 via the output terminal.

Although the notification unit 6 of the above embodiment has been audibly notified, the notification unit 6 may be configured to visually notify by blinking light or the like, and to be notified by vibration. There may be. Further, the physical condition monitoring system 100 of the above embodiment does not have to have the notification unit 6.

As long as the features of the present invention are maintained, the present invention is not limited to the above-described embodiment, and other modes considered within the scope of the technical idea of the present invention are also included within the scope of the present invention. ..

The physical condition monitoring system of the present invention can easily detect excretion, vomiting, bleeding, etc. of a subject without attaching any device to the subject. Therefore, the physical condition monitoring system of the present invention can improve the quality of nursing care for patients and care recipients.

1 Load detection unit 11, 12, 13, 14 Load detector 2 A / D conversion unit 3 Control unit 31 Signal separation unit (load separation unit)
32 Center of gravity position calculation unit 33 Physical condition determination unit 4 Storage unit 5 Display unit 6 Notification unit 7 Input unit 100 Physical condition monitoring system BD Bed BDS Bed system GT Center of gravity trajectory S Subject

Claims (6)

A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separator that separates the respiratory component that vibrates according to the subject's breathing from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's respiratory center of gravity based on the respiratory component.
A physical condition determination unit that determines the physical condition of the subject based on the comparison between the position of the overall center of gravity and the position of the respiratory center of gravity .
The size of the load applied to the bed when the position of the total center of gravity and the position of the respiratory center of gravity coincide with each other, and the bed after the position of the total center of gravity and the position of the respiratory center of gravity deviate from each other. A physical condition monitoring system equipped with a load comparison unit that compares the magnitude of the load applied to . The physical condition monitoring system according to claim 1, wherein the physical condition of the subject to be determined is the presence or absence of excretion by the subject. A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separator that separates the respiratory component that vibrates according to the subject's breathing from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's respiratory center of gravity based on the respiratory component.
It is provided with a physical condition determination unit that determines the physical condition of the subject based on the comparison between the position of the overall center of gravity and the position of the respiratory center of gravity.
The physical condition of the subject to be determined is a physical condition monitoring system indicating the presence or absence of excretion by the subject. A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separation unit that separates the heartbeat component that vibrates according to the subject's heartbeat from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's heartbeat center of gravity based on the heartbeat component.
A physical condition determination unit that determines a subject's physical condition based on a comparison between the position of the overall center of gravity and the position of the heartbeat center of gravity.
The size of the load applied to the bed when the position of the total center of gravity and the position of the heartbeat center of gravity coincide with each other, and the bed after the position of the total center of gravity and the position of the heartbeat center of gravity deviate from each other. A physical condition monitoring system equipped with a load comparison unit that compares the magnitude of the load applied to the bed. The physical condition monitoring system according to claim 4, wherein the physical condition of the subject to be determined is the presence or absence of excretion by the subject. A physical condition monitoring system that monitors the physical condition of a subject on the bed.
Multiple load detectors installed on the bed or under the legs of the bed to detect the load applied to the bed,
A load separation unit that separates the heartbeat component that vibrates according to the subject's heartbeat from the load applied to the bed.
A center of gravity position calculation unit that obtains the position of the entire center of gravity based on the load applied to the bed and obtains the position of the subject's heartbeat center of gravity based on the heartbeat component.
It is provided with a physical condition determination unit that determines the physical condition of the subject based on the comparison between the position of the overall center of gravity and the position of the heartbeat center of gravity.
The physical condition of the subject to be determined is a physical condition monitoring system indicating the presence or absence of excretion by the subject.

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