Monitoring systems and wireless tags

Abstract

To determine a condition of a watching target person on appropriate conditions.SOLUTION: A watching system comprises a wireless tag 10 and a receiver. The wireless tag 10 includes a triaxial acceleration sensor 22, an atmospheric pressure sensor 24, a tag-side arithmetic device 26 and a wireless circuit 28. The tag-side arithmetic device 26 acquires an atmospheric pressure detection value of the atmospheric pressure sensor 24 and an acceleration detection value of the triaxial acceleration sensor 22. The wireless circuit 28 transmits a sensor signal including the atmospheric pressure detection value and the acceleration detection value. The receiver receives the sensor signal and determines a condition of a watching target person with the wireless tag 10 mounted thereon on the basis of the atmospheric pressure detection value and the acceleration detection value. The receiver transmits a signal corresponding to the condition of the watching target person toward a management computer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a monitoring system and a wireless tag, and in particular to a technology for determining the state of a person being monitored. [Background technology]

[0002] Research and development is being conducted on systems that monitor the status of people being monitored (those requiring care, assistance, patients, etc.) in nursing homes, hospitals, etc. Some of these monitoring systems use infrared sensors or cameras to recognize the behavior of the people being monitored.

[0003] The following Patent Documents 1 and 2 describe monitoring systems. In the monitoring system described in Patent Document 1, the state of the person being watched over is captured as an image, and the image information is sent to a management device. In this system, it is detected when the person being watched over moves outside a predetermined area. In the monitoring system described in Patent Document 2, a plurality of infrared receiving elements arranged on the bed determine whether the person being watched over is lying down, and the determination result is sent to an administrator server device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-149003 [Patent Document 2] Patent No. 6582305 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, some conventional monitoring systems detect when the person being monitored moves outside a predetermined area. However, these systems often notify the caregiver too late, and by the time the caregiver arrives at the person being monitored, the person may have already fallen. Furthermore, some conventional monitoring systems determine whether the person being monitored is lying down. However, these systems may also issue a warning to the caregiver if the person being monitored simply rolls over or sits up.

[0006] The present invention aims to determine the state of a person being watched over under appropriate conditions. [Means for solving the problem]

[0007] The present invention provides a wireless tag including a barometric pressure sensor, an acceleration sensor, and a wireless circuit for transmitting a sensor signal including a barometric pressure detection value acquired by the barometric pressure sensor and an acceleration detection value acquired by the acceleration sensor, and a receiver for receiving the sensor signal and judging the state of a person being watched over to which the wireless tag is attached based on the barometric pressure detection value and the acceleration detection value, the receiver having a correction barometric pressure sensor and acquiring a correction barometric pressure detection value from the correction barometric pressure sensor, determining the height of the wireless tag based on the difference between the barometric pressure detection value and a barometric pressure reference value and the difference between the correction barometric pressure detection value and the correction barometric pressure reference value, judging the state of the person being watched over based on the height of the wireless tag and the acceleration detection value, and transmitting a signal according to the state of the person being watched over. The receiver determines that the person being watched over has moved to a sitting position or a lateral position based on the height of the wireless tag and the vibration amount of the wireless tag obtained based on the acceleration detection value. It is characterized by: The present invention also provides a wireless tag having a barometric pressure sensor, an acceleration sensor, and a wireless circuit that transmits a sensor signal including a barometric pressure detection value acquired by the barometric pressure sensor and an acceleration detection value acquired by the acceleration sensor, and a receiver that receives the sensor signal and determines the state of the person being monitored to which the wireless tag is attached based on the barometric pressure detection value and the acceleration detection value, wherein the receiver has a correction barometric pressure sensor, acquires a correction barometric pressure detection value from the correction barometric pressure sensor, determines the height of the wireless tag based on the difference between the barometric pressure detection value and the difference between the correction barometric pressure detection value and the correction barometric pressure reference value, determines the state of the person being monitored based on the height of the wireless tag and the acceleration detection value, and transmits a signal corresponding to the state of the person being monitored, and the barometric pressure reference value and the correction barometric pressure reference value are values ​​acquired by the barometric pressure sensor and the correction barometric pressure sensor, respectively, when the person being monitored is in a supine or lateral position. The present invention also provides a wireless tag having a barometric pressure sensor, an acceleration sensor, and a wireless circuit for transmitting a sensor signal including the barometric pressure detection value acquired by the barometric pressure sensor and the acceleration detection value acquired by the acceleration sensor; and a receiver that receives the sensor signal and determines the state of the person being monitored to which the wireless tag is attached based on the barometric pressure detection value and the acceleration detection value, wherein the receiver has a corrective barometric pressure sensor and acquires a corrective barometric pressure detection value from the corrective barometric pressure sensor, and determines the height of the wireless tag based on the difference between the barometric pressure detection value and the difference between the corrective barometric pressure detection value and the corrective barometric pressure reference value, determines the state of the person being monitored based on the height of the wireless tag and the acceleration detection value, and transmits a signal according to the state of the person being monitored, and the receiver determines whether the person being monitored is in one of the following positions based on the acceleration detection values ​​in three orthogonal axis directions: supine, prone, lateral, lateral with head upright, semi-sitting, long-sitting, or edge-sitting.

[0008] Preferably, the signal according to the state of the person being watched over indicates the state of the person being watched over.

[0009] Preferably, the receiver is No recordThe receiver determines whether the person being watched over needs assistance based on the height of the wire tag and the vibration amount of the wireless tag calculated based on the acceleration detection value, and transmits a signal according to the state of the person being watched over. The receiver may transmit a warning signal according to the state of the person being watched over.

[0013] Preferably, the wireless tag acquires the detected air pressure value by the air pressure sensor at a frequency corresponding to the detected acceleration value, and the wireless circuit transmits the sensor signal at a frequency corresponding to the detected acceleration value. 。

[0014] The present invention is a wireless tag, comprising: an atmospheric pressure sensor; an acceleration sensor; The device comprises a wireless circuit that communicates with a receiver, and an arithmetic device that determines the state of the person being watched over to which the wireless tag is attached, wherein the receiver is equipped with a correction air pressure sensor and obtains a correction air pressure detection value using the correction air pressure sensor, the arithmetic device obtains the air pressure detection value using the air pressure sensor, the wireless circuit communicates with the receiver to obtain the correction air pressure detection value, calculates the height of the wireless tag based on the difference between the air pressure detection value and a reference air pressure value and the difference between the correction air pressure detection value and a reference air pressure value, and determines the state of the person being watched over based on the height of the wireless tag and the acceleration detection value obtained by the acceleration sensor, and the wireless circuit The signal corresponding to the state of the person being watched over To the receiver Send Ruko It is characterized by the following.

[0015] Preferably, the signal according to the state of the person being watched over indicates the state of the person being watched over.

[0016] Preferably, the computing device No record The wireless circuit determines whether the person being watched over needs assistance based on the height of the line tag and the vibration amount of the wireless tag calculated based on the acceleration detection value, and transmits a signal according to the state of the person being watched over. The wireless circuit may also transmit a warning signal according to the state of the person being watched over. Preferably, the computing device determines that the person being monitored has made a long sitting or lateral movement based on the height of the wireless tag's position and the vibration amount of the wireless tag calculated based on the acceleration detection value.

[0017] Preferably, when the person being monitored is in a supine or lateral position, the computing device uses the value obtained by the air pressure sensor as the air pressure reference value, calculates the height of the wireless tag based on the difference between the air pressure reference value and the air pressure detection value, and determines the condition of the person being monitored based on the height of the wireless tag and the acceleration detection value.

[0018] Preferably, the computing device calculates the detected air pressure value and the correcting air pressure value at a frequency corresponding to the detected acceleration value. detection and the wireless circuit transmits a signal according to the state of the person being watched over at a frequency according to the acceleration detection value. Preferably, the computing device determines whether the person being watched over is in one of the following positions based on the acceleration detection values ​​in three orthogonal axial directions: supine, prone, lateral, lateral with head upright, semi-sitting, long-sitting, and edge-sitting.

[0019] The present invention provides a wireless tag including an acceleration sensor and a wireless circuit that transmits a sensor signal including an acceleration detection value acquired by the acceleration sensor, and a receiver that receives the sensor signal and determines the state of a person being watched over to whom the wireless tag is attached based on the acceleration detection value, wherein the receiver: Based on the number of vibrations of the wireless tag obtained based on the acceleration detection value, it is determined that the person being watched over needs help, and The device is characterized in that it transmits a signal according to the state of the person being watched over. Preferably, when the receiver determines, based on the acceleration detection values ​​in three orthogonal axial directions, that the person being watched over is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the receiver determines, based on the number of vibrations of the wireless tag obtained based on the acceleration detection values, that the person being watched over has taken action to get out of bed.The present invention also includes a wireless tag including an acceleration sensor and a wireless circuit that transmits a sensor signal including the acceleration detection values ​​acquired by the acceleration sensor, and a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection values, wherein the receiver determines that the person being watched over needs help based on the total time that the wireless tag is in a state determined based on the acceleration detection values, and transmits a signal corresponding to the state of the person being watched over in accordance with the determination. Preferably, when the receiver determines based on the acceleration detection values ​​in three orthogonal axis directions that the person being monitored is in one of the following positions: side-lying with head upright, semi-sitting, long-sitting, or edge-sitting, it determines that the person being monitored has taken action to get out of bed based on the total amount of time that the wireless tag is vibrating and in the state determined based on the acceleration detection values.

[0020] Preferably, the signal according to the state of the person being watched over indicates the state of the person being watched over.

[0021] Preferably, the receiver determines that the person being watched over needs assistance based on the vibration amount of the wireless tag obtained based on the acceleration detection value, and transmits a signal corresponding to the state of the person being watched over in accordance with the determination. The receiver may also transmit a warning signal as a signal corresponding to the state of the person being watched over in accordance with the determination.

[0022] Preferably, the receiver determines that the person being watched over needs assistance based on the number of vibrations of the wireless tag obtained based on the acceleration detection value, and transmits a signal corresponding to the state of the person being watched over in accordance with the determination. The receiver may also transmit a warning signal as a signal corresponding to the state of the person being watched over in accordance with the determination.

[0023] Preferably, the wireless circuit transmits the sensor signal at a frequency corresponding to the detected acceleration value.

[0024] The present invention is a wireless tag comprising an acceleration sensor, a computing device that determines the state of a person being watched over to which the wireless tag is attached based on an acceleration detection value acquired by the acceleration sensor, and a wireless circuit that transmits a signal according to the state of the person being watched over. The computing device determines whether the person being watched over needs help based on the number of vibrations of the wireless tag obtained based on the acceleration detection value, and the wireless circuit transmits a signal according to the state of the person being watched over in response to the determination. It is characterized by the following. Preferably, when the arithmetic device determines, based on the acceleration detection values ​​in three orthogonal axial directions, that the person being watched over is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the arithmetic device determines, based on the number of vibrations of the wireless tag obtained based on the acceleration detection values, that the person being watched over has taken action to get out of bed.The present invention also relates to a wireless tag comprising an acceleration sensor, a arithmetic device that determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection values ​​acquired by the acceleration sensor, and a wireless circuit that transmits a signal according to the state of the person being watched over, wherein the arithmetic device determines that the person being watched over needs help based on the total time that the wireless tag is in a state determined based on the acceleration detection values, and the wireless circuit transmits a signal according to the state of the person being watched over in response to the determination. Preferably, when the computing device determines, based on the acceleration detection values ​​in three orthogonal axis directions, that the person being monitored is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, it determines that the person being monitored has taken action to get out of bed based on the total amount of time that the wireless tag was vibrating and in the state determined based on the acceleration detection values.

[0025] Preferably, the signal according to the state of the person being watched over indicates the state of the person being watched over.

[0026] Preferably, the computing device determines that the person being watched over needs assistance based on the vibration amount of the wireless tag obtained based on the acceleration detection value, and the wireless circuit transmits a signal corresponding to the state of the person being watched over in response to the determination.The wireless circuit may also transmit a warning signal as a signal corresponding to the state of the person being watched over in response to the determination.

[0027] Preferably, the computing device determines that the person being watched over needs assistance based on the number of vibrations of the wireless tag obtained based on the acceleration detection value, and the wireless circuit transmits a signal corresponding to the state of the person being watched over in response to the determination.The wireless circuit may also transmit a warning signal as a signal corresponding to the state of the person being watched over in response to the determination.

[0028] Preferably, the wireless circuit transmits a signal according to the state of the person being watched over at a frequency according to the detected acceleration value. [Effects of the Invention]

[0029] According to the present invention, the state of the person being watched over can be determined under appropriate conditions. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is a diagram illustrating a monitoring system. [Figure 2] FIG. 2 is a diagram illustrating the configuration of a wireless tag. [Figure 3] FIG. 1 is a diagram illustrating the configuration of a receiver. [Figure 4] FIG. 10 is a diagram showing an example of a body position of a person requiring care. [Figure 5] FIG. 10 is a diagram showing the behavior of a care-requiring person before getting out of bed. DETAILED DESCRIPTION OF THE INVENTION

[0031] (1) Configuration of the monitoring system and basic processing performed by the monitoring system FIG. 1 shows a monitoring system 100 according to an embodiment of the present invention. The monitoring system 100 includes a wireless tag 10 and a receiver 12. The wireless tag 10 is fixed to the body of a care recipient and includes a condition detector for detecting the condition of the care recipient. The wireless tag 10 transmits a sensor signal including a detection value of the condition detector. The receiver 12 receives the sensor signal and determines the condition of the care recipient, such as the care recipient's position in bed, based on the detection value included in the sensor signal. The receiver 12 is connected to a nurse call connector 14. The nurse call connector 14 is connected to a communication line leading to a nurse call center. When the receiver 12 determines that the care recipient needs to be alerted (the care recipient as the person being monitored needs help), such as when the care recipient gets out of bed, the receiver 12 generates an alarm signal and transmits the alarm signal to a nurse station. A management computer is installed in the nurse station, and the management computer alerts the care recipient by sounding an alarm in response to the alarm signal. When the care recipient recognizes the alarm from the management computer, they head to the care recipient's room as needed to provide care.

[0032] If information can be transmitted and received via a wireless communication line between the receiver 12 and the management computer, the receiver 12 may transmit the sensor signal to the management computer via the wireless communication line.

[0033] FIG. 2 shows the configuration of the wireless tag 10. The wireless tag 10 includes a status detector 20, a tag-side arithmetic device 26, a wireless circuit 28, a storage device 30, and a battery 32. The wireless tag 10 operates using power output from the battery 32. The status detector 20 includes a triaxial acceleration sensor 22 and an atmospheric pressure sensor 24. The triaxial acceleration sensor 22 outputs acceleration detection values ​​corresponding to accelerations applied to the wireless tag 10 in each of the orthogonal x-, y-, and z-axis directions to the tag-side arithmetic device 26. The wireless tag 10 is fixed to the care recipient so that the positive x-axis direction corresponds to the left of the care recipient, the positive y-axis direction corresponds to the direction toward the care recipient's head, and the positive z-axis direction corresponds to the front of the care recipient. The atmospheric pressure sensor 24 detects the atmospheric pressure around the wireless tag 10 and outputs the detected atmospheric pressure value to the tag-side arithmetic device 26.

[0034] The tag-side arithmetic device 26 may be a processor that executes a program stored in the storage device 30. Numerical values ​​obtained during processing executed by the tag-side arithmetic device 26 or as a result of processing may be stored in the storage device 30. The storage device 30 may be a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory).

[0035] The tag-side calculation device 26 generates a sensor signal including an acceleration detection value in the x-axis direction, an acceleration detection value in the y-axis direction, and an acceleration detection value in the z-axis direction (hereinafter referred to as the x-axis detection value, the y-axis detection value, and the z-axis detection value, respectively), and an air pressure detection value, and outputs the signal to the wireless circuit 28. The wireless circuit 28 wirelessly transmits the sensor signal.

[0036] 3 shows the configuration of the receiver 12. The receiver 12 includes a receiver-side computing device 40, a wireless circuit 42, a correction barometric pressure sensor 44, a storage device 46, and a communication interface 48. The communication interface 48 is connected to the nurse call connector 14. The receiver-side computing device 40 is connected to a communication line leading to the nurse station via the communication interface 48 and the nurse call connector 14, and transmits and receives information to and from the management computer. The communication interface 48 and the nurse call connector 14 are for wired communication, but the communication line leading from the nurse call connector 14 to the nurse station may include either a wireless communication line or a wired communication line.

[0037] The wireless circuit 42 receives the sensor signal transmitted from the wireless tag 10 and outputs it to the receiver-side computing device 40. The receiver-side computing device 40 may include a processor that executes a program stored in the storage device 46. Numerical values ​​obtained during processing executed by the receiver-side computing device 40 or as a result of the processing may be stored in the storage device 46. The storage device 46 may be a memory such as a ROM or RAM.

[0038] The receiver-side computing device 40 extracts the air pressure detection value, x-axis detection value, y-axis detection value, and z-axis detection value from the sensor signal. The receiver-side computing device 40 executes a body position determination process (described later) using the air pressure detection value, x-axis detection value, y-axis detection value, and z-axis detection value to determine the condition of the care recipient. The receiver-side computing device 40 generates a care recipient signal (monitored person signal) representing the condition of the care recipient and transmits the care recipient signal via the communication interface 48 and the nurse call connector 14 to a communication line. The management computer receives the care recipient signal from the communication line. The caregiver understands the condition of the care recipient from the information provided by the management computer.

[0039] Furthermore, the receiver-side computing device 40 generates a warning signal in addition to the care-requiring person signal when the care-requiring person needs attention, such as when the care-requiring person is out of bed. The receiver-side computing device 40 transmits the warning signal to the communication line via the communication interface 48 and the nurse call connector 14, and transmits the warning signal to the management computer. In response to the warning signal, the management computer sounds an alarm or otherwise alerts the care-requiring person. Upon recognizing the alarm from the management computer, the care-requiring person heads to the care-requiring person's room to provide care, as necessary.

[0040] (2) Posture determination processing The following describes the body position determination process executed by the receiver-side computing device 40. FIG. 4 shows examples of body positions of a care recipient. FIGS. 4(a) to 4(c) show the care recipient in the supine position, semi-sitting position, and side-lying position with head raised, respectively. The supine position is a position in which the care recipient lies on their back. The semi-sitting position is a position in which the care recipient sits leaning against a backrest that is raised diagonally from the horizontal. The side-lying position with head raised is a position in which the care recipient lies with the front-to-back direction of the body facing horizontally, supporting the upper body with the arms and raising the head. FIGS. 4(d) to 4(f) show the care recipient in the long-sitting position, edge-sitting position, and out-of-bed position, respectively. The long-sitting position shows a position in which the upper body is raised on the bed without using a backrest or the like. The edge-sitting position is a position in which the care recipient sits on the edge of the bed. The out-of-bed position is a position in which the care recipient stands beside or away from the bed. Although not shown in Figure 4, there are also situations in which the person requiring care is lying face down on the bed.

[0041] Under typical physical phenomena, the higher the pressure detection value of the pressure sensor, the lower the position of the pressure sensor, and the lower the pressure detection value, the higher the position of the pressure sensor. The receiver-side arithmetic device 40 uses a height measurement process that utilizes this physical phenomenon to determine the height H of the position of the wireless tag 10 based on the detected pressure value. The height measurement process will be described later.

[0042] When the following conditions (A) to (F) are satisfied for a time exceeding a predetermined determination time T0, the receiver-side arithmetic device 40 determines that the state of the care recipient is in the supine position, prone position, lateral position, lateral position with the head raised, semi-reclining position, long seat position, or end seat position, respectively. However, g is the gravitational acceleration, and Δx and Δz are the allowable ranges (margins) at the time of determination.

[0043] (A) Conditions for determining the supine position z-axis detection value ≤ -g + Δz (B) Conditions for determining the prone position z-axis detection value ≥ g - Δz (C) Conditions for determining the lateral position y-axis detection value > semi-reclining position determination value Y1, and (x-axis detection value ≥ g - Δx, or x-axis determination value ≤ -g + Δx) (D) Conditions for determining the lateral position with the head raised y-axis detection value ≤ semi-reclining position determination value Y1, and y-axis detection value > long seat position determination value Y2, and (x-axis detection value ≥ g - Δx, or x-axis determination value ≤ -g + Δx) (E) Conditions for determining the semi-reclining position y-axis detection value ≤ semi-reclining position determination value Y1, and y-axis detection value > long seat position determination value Y2, and x-axis detection value < g - Δx, and x-axis detection value > -g + Δx (F) Conditions for determining the long seat or end seat position y-axis detection value ≤ long seat position determination value Y2

[0044] The receiver-side arithmetic device 40 determines the state of the care recipient according to the above conditions (A) to (F), and generates a care recipient signal representing the state of the care recipient. The receiver-side arithmetic device 40 transmits the care recipient signal to the communication line via the communication interface 48 and the nurse call connector 14. The management computer receives the care recipient signal from the communication line. Also, the receiver-side arithmetic device 40 may output the care recipient signal to the wireless circuit 42. In this case, the wireless circuit 42 wirelessly transmits the care recipient signal to the management computer.

[0045] (3) Transmission of warning signal 5(a) to 5(c) show the actions of the care recipient before getting out of bed. FIG. 5(a) shows a long sitting movement in which the care recipient moves while maintaining a long sitting position. FIG. 5(b) shows a side-lying movement in which the care recipient moves while maintaining a side-lying position with the head upright. FIG. 5(c) shows an action just before standing in which the care recipient attempts to stand up from a sitting-on-the-edge position. In these actions, the wireless tag 10 is in a position higher than the height indicated by the predetermined semi-sitting position determination value H1, and the time the care recipient moves their body from that position, i.e., the time the care recipient vibrates, continues for a predetermined period of time or longer.

[0046] Therefore, the receiver-side computing device 40 first determines whether the following condition (G) is satisfied for a period of time exceeding a predetermined determination time T1. Condition (G) is a height-related condition that the height H is equal to or greater than the half-sitting position determination value H1, and is equivalent to the air pressure-related condition that the detected air pressure value is equal to or less than a predetermined value corresponding to the half-sitting position determination value H1. (G) Height Requirements Height H ≥ Semi-sitting position judgment value H1 If condition (G) is met, the care-requiring person is likely to be in a lateral position with his / her head raised, a semi-sitting position, or a long-sitting or edge-sitting position.

[0047] When the condition (G) is met, the receiver-side arithmetic device 40 determines whether the next condition (H) is met. (H) Conditions regarding the duration of vibration of the care recipient After condition (G) is met, the total time that the care-requiring person is in a vibrating state exceeds the judgment time T2, or the state in which condition (G) is met continues for a time that exceeds the judgment time T3.

[0048] The state in which the care-requiring person is vibrating is defined, for example, as the vibration amount of the wireless tag 10 exceeding a vibration reference value αs. The vibration amount of the wireless tag 10 is defined, for example, by the fluctuation width of the total acceleration detection value within a predetermined time period, or the value obtained by subtracting the minimum value from the maximum value within a predetermined time period. The total acceleration detection value is the square root of the value obtained by adding together the square of the x-axis detection value, the square of the y-axis detection value, and the square of the z-axis detection value.

[0049] In this way, by making a determination based on the time the care recipient is in a vibrating state in addition to the height condition (G), it is possible to quickly grasp the long sitting position shown in Fig. 5(a) and the lateral recumbent position shown in Fig. 5(b). Furthermore, by combining the atmospheric pressure sensor 24 and the triaxial acceleration sensor 22, when attaching the wireless tag 10 to the care recipient, the relationship between the coordinate axes defined by the triaxial acceleration sensor 22 and the orientation of the care recipient can be set arbitrarily. This eliminates the need to pay attention to the orientation of the wireless tag 10 when attaching it to the care recipient, making it easier to attach the wireless tag 10.

[0050] When it is determined that the care recipient is taking action before getting out of bed, the receiver-side computing device 40 generates a care recipient signal indicating that the care recipient is taking action before getting out of bed. The receiver-side computing device 40 further generates a warning signal, transmits the care recipient signal and the warning signal to the communication line via the communication interface 48 and the nurse call connector 14, and transmits the care recipient signal and the warning signal to the management computer. The receiver-side computing device 40 may also output the care recipient signal and the warning signal to the wireless circuit 42. The wireless circuit 42 wirelessly transmits the care recipient signal and the warning signal to the management computer. The caregiver grasps the condition of the care recipient based on the information indicated by the management computer. The management computer also sounds an alarm in response to the warning signal to alert the caregiver. When the caregiver recognizes the alarm from the management computer, they head to the care recipient's room to provide care as needed.

[0051] The receiver-side computing device 40 may also generate and transmit a warning signal when the following conditions (i) to (v) are met: (i) Conditions for determining that the care recipient has taken the action immediately before standing After the above condition (G) is met, the height H increases beyond the judgment value X within the predetermined judgment time Tx. In other words, from a semi-sitting, long-sitting, or edge-sitting position, the height H increases beyond the judgment value X within the predetermined judgment time Tx. Note that instead of condition (G), it may be determined that the height H increases beyond the judgment value X within the predetermined judgment time Tx after the above condition (E) or (F) is met. (ii) Conditions for determining that a care recipient has fallen Reference height H0 > height H, or decrease in height H within a specified time > reference decrease rate D1 (iii) Conditions for determining whether the care recipient is taking pre-bedtime actions After any of the above conditions (D), (E), or (F) is met (after it is determined that the person in need of care is in a side-lying position with their head upright, a semi-sitting position, or a long-sitting or edge-sitting position), the total time that the person in need of care is in a vibrating state exceeds the judgment time T2. Or, the state in which any of the above conditions (D), (E), or (F) is met continues for a time that exceeds the judgment time T3. (iv) Conditions for determining that the vibration of the care recipient has continued while lying face down, or conditions for determining that the care recipient has been lying face down for a long period of time. After the condition (B) above is met (after it is determined that the care recipient is lying face down), the total time that the care recipient is vibrating in that state exceeds the judgment time T3, or the face down state continues for a time that exceeds the judgment time T5. (v) Conditions for determining that body movement has stopped The person requiring care does not vibrate for a period of time exceeding the judgment time T6.

[0052] The set of settings, such as the half-sitting position determination value Y1, half-sitting position determination value H1, long-sitting position determination value Y2, allowable ranges Δx, Δy, Δz, determination times T1 to T6, reference height H0, reference decrease rate D1, determination time Tx, determination value X, and vibration reference value αs, may be read by a management computer in response to an operation by a user such as a caregiver. In this case, the management computer transmits the set of settings to the receiver 12 via a communication line. Alternatively, the management computer may transmit the set of settings by wireless signal. In this case, the receiver-side computing device 40 included in the receiver 12 acquires the set of settings from a signal received by the wireless circuit 42.

[0053] Examples of the set values ​​included in the set value group are as follows: Semi-sitting position determination value Y1 = -5.5 [m / s 2 ], semi-sitting position judgment value H1 = 20 [cm], long sitting position judgment value Y2 = -9.0 [m / s 2 ], allowable range Δx=3.8[m / s 2 ], allowable range Δz = 3.8 [m / s 2 ], judgment time T1 = 0.5 [s], judgment time T2 = 2 [s], judgment time T3 = 30 [s], judgment time T4 = 10 [s], judgment time T5 = 600 [s], judgment time T6 = 1200 [s], reference height H0 = -30 [cm], reference decrease rate D1 = 10 cm / 0.5 s, judgment value X = 15 [cm].

[0054] (4) Height measurement processing The receiver 12 may measure the height of the position of the wireless tag 10 while correcting the time fluctuation of the air pressure detection values ​​sequentially acquired over time by the air pressure sensor 24 of the wireless tag 10, that is, while correcting the time fluctuation of the air pressure detection values ​​sequentially transmitted by the sensor signals from the wireless tag 10. The correction air pressure detection value by the correction air pressure sensor 44 is used to correct the time fluctuation of the air pressure detection values.

[0055] When measuring the height of the wireless tag 10, the receiver-side computing device 40 calculates the atmospheric pressure reference value. The receiver-side computing device 40 may calculate the atmospheric pressure reference value P0 when it determines that the care-requiring person is in a supine position, i.e., when it determines that condition (A) is met. If the care-requiring person was not previously determined to be in a supine position, the receiver-side computing device 40 may calculate the atmospheric pressure reference value P0 when it determines that the care-requiring person is in a lateral position, i.e., when it determines that condition (C) is met. The receiver-side computing device 40 may also update the atmospheric pressure reference value P0 at predetermined time intervals. For example, if the latest atmospheric pressure detection value P is greater than the most recently calculated atmospheric pressure reference value, the latest atmospheric pressure detection value P may be updated as the atmospheric pressure reference value P0.

[0056] The correction atmospheric pressure sensor 44 sequentially detects the atmospheric pressure around the receiver 12 over time and outputs a correction atmospheric pressure detection value Q to the receiver-side calculation device 40. The receiver-side calculation device 40 sets the correction atmospheric pressure detection value output from the correction atmospheric pressure sensor 44 when the above-mentioned atmospheric pressure reference value P0 is calculated as the correction atmospheric pressure reference value Q0. The receiver-side calculation device 40 calculates the atmospheric pressure increase ΔP relative to the atmospheric pressure reference value P0 based on the atmospheric pressure detection value P, the atmospheric pressure reference value P0, the correction atmospheric pressure detection value Q, and the correction atmospheric pressure reference value Q0 according to the following (Equation 1).

[0057] (Math 1)ΔP=P-(P0-(Q-Q0))

[0058] (Equation 1) means that the time fluctuation of the atmospheric pressure reference value P0 is compensated for by the value obtained by subtracting the correction atmospheric pressure reference value Q0 from the correction atmospheric pressure detected value Q.

[0059] The receiver-side calculation device 40 stores a table in which the height (altitude) of the atmospheric pressure sensor 24 relative to a predetermined height can be calculated from the atmospheric pressure increment ΔP, and calculates the height based on the atmospheric pressure increment ΔP. Alternatively, the atmospheric pressure sensor 24 may use the atmospheric pressure increment ΔP as an input value (independent variable) to a predetermined function and calculate the height by calculating the output value (dependent variable) of the function.

[0060] The receiver 12 does not necessarily have to use the correction atmospheric pressure sensor 44. In this case, the receiver-side calculation device 40 calculates the atmospheric pressure increase ΔP based on (Equation 2) in which Q−Q0 in (Equation 1) is set to 0.

[0061] (Math 2)ΔP=P-P0

[0062] (5) Intermittent operation If there is no change exceeding a predetermined range in any of the x-axis, y-axis, and z-axis detected values ​​within a predetermined time, the tag-side computing device 26 acquires the x-axis, y-axis, and z-axis detected values ​​from the triaxial acceleration sensor 22 every time interval Ts elapses. On the other hand, if there is a change exceeding a predetermined range in any of the x-axis, y-axis, and z-axis detected values ​​within a predetermined time, the tag-side computing device 26 acquires the x-axis, y-axis, and z-axis detected values ​​from the triaxial acceleration sensor 22 every time interval Tm elapses. The time interval Ts is longer than the time interval Tm. For example, the time interval Ts may be on the order of seconds, and the time interval Tm may be on the order of milliseconds.

[0063] Furthermore, if there is no change exceeding a predetermined range in any of the x-axis, y-axis, and z-axis detected values ​​within a predetermined time, the radio circuit 28 in the radio tag 10 wirelessly transmits a sensor signal every time a time interval Ts elapses. On the other hand, if there is a change exceeding a predetermined range in any of the x-axis, y-axis, and z-axis detected values ​​within a predetermined time, the radio circuit 28 in the radio tag 10 wirelessly transmits a sensor signal every time a time interval Tm elapses.

[0064] In this way, the wireless tag 10 acquires each atmospheric pressure detection value at time intervals according to the x-axis, y-axis, or z-axis detection value, i.e., at a frequency according to the acceleration detection value, using the atmospheric pressure sensor 24. Then, the wireless circuit 28 transmits a sensor signal at time intervals according to the x-axis, y-axis, or z-axis detection value, i.e., at a frequency according to the acceleration detection value.

[0065] The wireless tag 10 may cut off power to some or all of the internal circuits constituting the tag-side computing device 26 while the tag-side computing device 26 is not acquiring x-axis, y-axis, or z-axis detected values ​​and while it is not outputting a sensor signal. Also, the wireless tag 10 may cut off power to some or all of the internal circuits constituting the wireless circuit 28 while the wireless circuit 28 is not wirelessly transmitting a sensor signal. Such intermittent operation reduces power consumption of the battery 32.

[0066] If the total acceleration detection value (the square root of the value obtained by adding together the squares of the x-axis detection value, the y-axis detection value, and the z-axis detection value) does not change beyond a predetermined range within a predetermined time, the tag-side computing device 26 may acquire the x-axis detection value, the y-axis detection value, and the z-axis detection value from the triaxial acceleration sensor 22 every time interval Ts elapses.If the total acceleration detection value changes beyond a predetermined range within the predetermined time, the tag-side computing device 26 may acquire the x-axis detection value, the y-axis detection value, and the z-axis detection value from the triaxial acceleration sensor 22 every time interval Tm elapses.

[0067] Similarly, the radio circuit 28 in the radio tag 10 may wirelessly transmit a sensor signal every time a time interval Ts elapses if the total acceleration detection value does not change beyond a predetermined range within a predetermined time. Then, the radio circuit 28 in the radio tag 10 may wirelessly transmit a sensor signal every time a time interval Tm elapses if the total acceleration detection value changes beyond a predetermined range within a predetermined time.

[0068] (6) Processing performed by the tag-side computing device The above describes an embodiment in which the receiver-side arithmetic device 40 extracts the air pressure detection value, x-axis detection value, y-axis detection value, and z-axis detection value from the sensor signal transmitted from the wireless tag 10, and then performs the height measurement process and the body position determination process based on these detection values ​​and the corrected air pressure detection value. The height measurement process and the body position determination process may also be performed by the tag-side arithmetic device 26.

[0069] In this case, the tag-side arithmetic device 26 performs height measurement processing and body position measurement processing based on the atmospheric pressure detection value acquired from the atmospheric pressure sensor 24 and the x-axis, y-axis, and z-axis detection values ​​acquired from the three-axis acceleration sensor 22. When performing the height measurement processing, by using (Equation 2), it is not necessary to use the corrected atmospheric pressure detection value acquired by the correction atmospheric pressure sensor 44 in the receiver 12. Note that the radio circuit 28 may communicate with the receiver 12 to acquire the corrected atmospheric pressure measurement value, and the radio circuit 28 may output the corrected atmospheric pressure measurement value to the tag-side arithmetic device 26. In this case, the tag-side arithmetic device 26 performs the height measurement processing using (Equation 1).

[0070] The tag-side computing device 26 transmits a care-requiring person signal or a warning signal, instead of transmitting a sensor signal as in the above embodiment. That is, the tag-side computing device 26 generates a care-requiring person signal by executing a height measurement process and a body position determination process, and outputs the care-requiring person signal to the wireless circuit 28. The wireless circuit 28 transmits the care-requiring person signal. The wireless circuit 42 included in the receiver 12 receives the care-requiring person signal and outputs it to the receiver-side computing device 40. The receiver-side computing device 40 transmits the care-requiring person signal to the management computer. Furthermore, the tag-side computing device 26 generates a warning signal according to the condition of the care-requiring person and outputs it to the wireless circuit 28. The wireless circuit 28 transmits the warning signal. The wireless circuit 42 included in the receiver 12 outputs the warning signal to the receiver-side computing device 40. The receiver-side computing device 40 transmits the warning signal to the management computer.

[0071] (7) Processing without using a barometric pressure sensor In the above section "(3) Transmission of Warning Signal," the height H of the wireless tag 10 is calculated using the atmospheric pressure detection value from the atmospheric pressure sensor 24, and when the condition (G) that the height H is equal to or greater than the semi-sitting position determination value H1 is met, the state of the care-requiring person is determined based on the acceleration detection value from the triaxial acceleration sensor 22. In this process, the care-requiring person is determined to be in one of the following positions: a lateral position with the head upright, a semi-sitting position, or a long-sitting or edge-sitting position, and a care-requiring person signal and a warning signal are generated according to the determination result. As will be described below, the receiver-side computing device 40 may also perform processing that does not use the atmospheric pressure detection value.

[0072] The receiver-side computing device 40 determines that the care-requiring person has taken an action to get out of bed when the above conditions (D) to (F) are met and the total time the care-requiring person has been in a vibrating state (the wireless tag 10 has been vibrating) exceeds a predetermined determination time T7. That is, when the condition (D) is met and the total time the care-requiring person has been in a vibrating state exceeds the determination time T7, the receiver-side computing device 40 determines that the care-requiring person has taken an action to get out of bed from a lateral position with their head upright. When the condition (E) is met and the total time the care-requiring person has been in a vibrating state exceeds the determination time T7, the receiver-side computing device 40 determines that the care-requiring person has taken an action to get out of bed from a semi-sitting position. When the condition (F) is met and the total time the care-requiring person has been in a vibrating state exceeds the determination time T7, the receiver-side computing device 40 determines that the care-requiring person has taken an action to get out of bed from a long-sitting position or an edge-sitting position.

[0073] In addition, the receiver-side calculation device 40 may determine that the person in need of care has taken action to get out of bed if the above conditions (D) to (F) are met for a period of time exceeding a predetermined judgment time T8.

[0074] Furthermore, when the above conditions (D) to (F) are met, the receiver-side computing device 40 may determine that the care-requiring person has taken an action to get out of bed if the number of times the care-requiring person has been in a vibrating state (the number of vibrations of the care-requiring person) is equal to or greater than a predetermined determination number N. That is, when condition (D) is met, the receiver-side computing device 40 may determine that the care-requiring person has taken an action to get out of bed from a lateral position with their head upright if the number of vibrations of the care-requiring person is equal to or greater than the determination number N. When condition (E) is met, the receiver-side computing device 40 may determine that the care-requiring person has taken an action to get out of bed from a semi-sitting position if the number of vibrations of the care-requiring person is equal to or greater than the determination number N. When condition (F) is met, the receiver-side computing device 40 may determine that the care-requiring person has taken an action to get out of bed from a long-sitting position or an edge-sitting position if the number of vibrations of the care-requiring person is equal to or greater than the determination number N.

[0075] The receiver-side computing device 40 generates a care-requiring person signal indicating the state of the care-requiring person and a warning signal in response to the determination result that the care-requiring person has attempted to get out of bed. Note that the set values ​​for the determination times T7, T8, the number of determinations N, etc. may be acquired by the receiver-side computing device 40 through the same processing as for the set of set values ​​described above.

[0076] The receiver-side computing device 40 transmits the care-requiring person signal and the warning signal to the communication line via the communication interface 48 and the nurse call connector 14, and transmits the care-requiring person signal and the warning signal to the management computer. The receiver-side computing device 40 may also output the care-requiring person signal and the warning signal to the wireless circuit 42. The wireless circuit 42 wirelessly transmits the care-requiring person signal and the warning signal to the management computer. The caregiver grasps the condition of the care-requiring person based on the information provided by the management computer. The management computer also sounds an alarm in response to the warning signal to alert the caregiver. When the caregiver recognizes the alarm from the management computer, they head to the room of the care-requiring person to provide care as needed.

[0077] In this way, when processing is performed based on acceleration detection values ​​rather than atmospheric pressure detection values, the status detector 20 does not need to be equipped with an atmospheric pressure sensor 24. In this case, the tag-side computing device 26 generates a sensor signal that includes x-axis, y-axis, and z-axis detection values ​​from the three-axis acceleration sensor 22, but does not include atmospheric pressure detection values, and outputs the signal to the wireless circuit 28. The wireless circuit 28 wirelessly transmits the sensor signal. In the above "(5) Intermittent Operation," processing related to the atmospheric pressure sensor 24 and atmospheric pressure detection values ​​is not performed.

[0078] Furthermore, the tag-side computing device 26 may perform the body position determination process and the generation and transmission of the care-required person signal and the warning signal instead of the receiver-side computing device 40. In this case, the tag-side computing device 26 performs the body position measurement process based on the x-axis, y-axis, and z-axis detected values ​​acquired from the triaxial acceleration sensor 22. The tag-side computing device 26 transmits a care-required person signal or a warning signal instead of transmitting a sensor signal as in the above embodiment. That is, the tag-side computing device 26 performs the body position determination process to generate a care-required person signal and output it to the wireless circuit 28. The wireless circuit 28 transmits the care-required person signal. The wireless circuit 42 included in the receiver 12 receives the care-required person signal and outputs it to the receiver-side computing device 40. The receiver-side computing device 40 transmits the care-required person signal to the management computer.

[0079] Furthermore, the tag-side computing device 26 generates a warning signal according to the state of the care-requiring person determined based on the acceleration detection value, and outputs the signal to the wireless circuit 28. The wireless circuit 28 transmits the warning signal. The wireless circuit 42 included in the receiver 12 outputs the warning signal to the receiver-side computing device 40. The receiver-side computing device 40 transmits the warning signal to the management computer.

[0080] (8) Other The receiver 12 may be provided with a control switch for selecting a time period for monitoring the care-requiring person. This switch may be provided with a light sensor and may operate in response to the detection result of the light sensor and user operation. The control switch turns on the power of the receiver 12 when the illuminance detected by the light sensor is equal to or less than a predetermined reference value β1 for a period exceeding a predetermined time τ1. At this time, if the user operates the control switch to turn off, the control switch turns off the power of the receiver 12. Furthermore, the control switch turns on the power of the receiver 12 when the illuminance detected by the light sensor is equal to or less than the predetermined reference value for a period exceeding the predetermined time τ1, and turns off the power of the receiver 12 when a predetermined time τ2 has elapsed without user operation.

[0081] The control switch may have a timer function, in which case the control switch turns on the power of the receiver 12 during a predetermined on time period and turns off the power of the receiver 12 during a predetermined off time period.

[0082] The setting information defining the reference value β1, time τ1, time τ2, on-time period, off-time period, etc. may be read by a management computer in response to a user operation. In this case, the management computer transmits the setting information to the receiver 12 via a communication line. Alternatively, the management computer may transmit the setting information by wireless signal. In this case, the receiver-side computing device 40 included in the receiver 12 acquires the setting information from the signal received by the wireless circuit 42.

[0083] Although the above describes an embodiment for watching over or caring for a person requiring care, the present invention may also be used in a system for watching over people who require assistance, hospitalized patients, or other people who have not been certified as needing care by a public institution.

[0084] According to the monitoring system of the embodiment of the present invention, the determination of whether a care-requiring person needs assistance is performed under appropriate conditions. This eliminates the problem of delayed notification to the caregiver. Furthermore, it is possible to avoid unnecessary warnings being issued when the care-requiring person simply rolls over in bed or sits up, which is not a problem. [Explanation of symbols]

[0085] 10 wireless tag, 12 receiver, 14 nurse call connector, 20 status detector, 22 three-axis acceleration sensor, 24 barometric pressure sensor, 26 tag side calculation device, 28, 42 wireless circuit, 30, 46 memory device, 32 battery, 40 receiver side calculation device, 44 correction barometric pressure sensor, 48 communication interface, 100 monitoring system.

Claims

1. A barometric pressure sensor; An acceleration sensor; a wireless circuit that transmits a sensor signal including the atmospheric pressure detection value acquired by the atmospheric pressure sensor and the acceleration detection value acquired by the acceleration sensor; a wireless tag comprising: a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the detected air pressure value and the detected acceleration value; The receiver includes: a correction air pressure sensor, and acquiring a correction air pressure detection value from the correction air pressure sensor; determining the height of the wireless tag based on the difference between the atmospheric pressure detection value and a reference atmospheric pressure value and the difference between the correction atmospheric pressure detection value and a correction atmospheric pressure reference value; determining a state of the person being watched over based on the height of the wireless tag and the acceleration detection value; Transmitting a signal according to the state of the person being watched over; A monitoring system characterized in that the receiver determines that the person being monitored has made a long sitting or lateral movement based on the height of the wireless tag's position and the vibration amount of the wireless tag calculated based on the acceleration detection value.

2. A barometric pressure sensor; An acceleration sensor; a wireless circuit that transmits a sensor signal including the atmospheric pressure detection value acquired by the atmospheric pressure sensor and the acceleration detection value acquired by the acceleration sensor; a wireless tag comprising: a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the detected air pressure value and the detected acceleration value; The receiver includes: a correction air pressure sensor, and acquiring a correction air pressure detection value from the correction air pressure sensor; determining the height of the wireless tag based on the difference between the atmospheric pressure detection value and a reference atmospheric pressure value and the difference between the correction atmospheric pressure detection value and a correction atmospheric pressure reference value; determining a state of the person being watched over based on the height of the wireless tag and the acceleration detection value; Transmitting a signal according to the state of the person being watched over; A monitoring system characterized in that the air pressure reference value and the corrective air pressure reference value are values ​​obtained by the air pressure sensor and the corrective air pressure sensor, respectively, when the person being monitored is in a supine or lateral position.

3. A barometric pressure sensor; An acceleration sensor; a wireless circuit that transmits a sensor signal including the atmospheric pressure detection value acquired by the atmospheric pressure sensor and the acceleration detection value acquired by the acceleration sensor; a wireless tag comprising: a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the detected air pressure value and the detected acceleration value; The receiver includes: a correction air pressure sensor, and acquiring a correction air pressure detection value from the correction air pressure sensor; determining the height of the wireless tag based on the difference between the atmospheric pressure detection value and a reference atmospheric pressure value and the difference between the correction atmospheric pressure detection value and a correction atmospheric pressure reference value; determining a state of the person being watched over based on the height of the wireless tag and the acceleration detection value; Transmitting a signal according to the state of the person being watched over; A monitoring system characterized in that the receiver determines whether the person being monitored is in one of the following positions based on the acceleration detection values ​​in three orthogonal axis directions: supine, prone, lateral, lateral with head upright, semi-sitting, long-sitting, or edge-sitting.

4. The monitoring system according to any one of claims 1 to 3, A monitoring system, characterized in that the signal according to the state of the person being monitored indicates the state of the person being monitored.

5. The monitoring system according to any one of claims 1 to 4, A monitoring system characterized in that the receiver determines that the person being monitored is in a state where they need help based on the height of the wireless tag's position and the vibration amount of the wireless tag calculated based on the acceleration detection value, and transmits a signal corresponding to the state of the person being monitored in accordance with that determination.

6. The monitoring system according to any one of claims 1 to 5, The wireless tag is The atmospheric pressure sensor acquires the atmospheric pressure detection value at a frequency corresponding to the acceleration detection value; The radio circuit A monitoring system characterized in that the sensor signal is transmitted at a frequency according to the acceleration detection value.

7. A wireless tag, The device comprises an air pressure sensor, an acceleration sensor, a wireless circuit for communicating with a receiver, and a computing device for determining the state of a person being watched over to whom the wireless tag is attached; The receiver includes: a correction air pressure sensor, and a correction air pressure detection value is obtained by the correction air pressure sensor; The computing device The atmospheric pressure sensor acquires an atmospheric pressure detection value; The wireless circuit communicates with the receiver to obtain the correction air pressure detection value, determining the height of the wireless tag based on the difference between the atmospheric pressure detection value and a reference atmospheric pressure value and the difference between the correction atmospheric pressure detection value and a correction atmospheric pressure reference value; determining a state of the person being watched over based on the height of the wireless tag and the acceleration detection value acquired by the acceleration sensor; The radio circuit A wireless tag that transmits a signal to the receiver according to the state of the person being watched over.

8. 8. The wireless tag according to claim 7, A wireless tag characterized in that the signal corresponding to the state of the person being watched over indicates the state of the person being watched over.

9. 9. The wireless tag according to claim 7, The wireless tag is characterized in that the computing device determines that the person being monitored is in a state where they need help based on the height of the wireless tag's position and the vibration amount of the wireless tag calculated based on the acceleration detection value, and the wireless circuit transmits a signal corresponding to the state of the person being monitored in accordance with the determination.

10. 9. The wireless tag according to claim 7, The wireless tag is characterized in that the computing device determines that the person being monitored has made a long sitting or lateral movement based on the height of the wireless tag's position and the vibration amount of the wireless tag calculated based on the acceleration detection value.

11. 11. The wireless tag according to claim 7, The wireless tag is characterized in that the computing device uses the value obtained by the air pressure sensor when the person being monitored is in a supine or lateral position as an air pressure reference value, calculates the height of the wireless tag based on the difference between the air pressure reference value and the air pressure detection value, and determines the condition of the person being monitored based on the height of the wireless tag and the acceleration detection value.

12. 12. The wireless tag according to claim 7, The computing device acquiring the atmospheric pressure detection value and the correction atmospheric pressure detection value at a frequency corresponding to the acceleration detection value; The radio circuit A wireless tag characterized by transmitting a signal corresponding to the state of the person being watched over at a frequency corresponding to the detected acceleration value.

13. 13. The wireless tag according to claim 7, The wireless tag is characterized in that the computing device determines whether the person being monitored is in one of the following positions based on the acceleration detection values ​​in three orthogonal axis directions: supine, prone, lateral, lateral with head upright, semi-sitting, long-sitting, or edge-sitting.

14. An acceleration sensor; a wireless circuit for transmitting a sensor signal including an acceleration detection value acquired by the acceleration sensor; a wireless tag comprising: a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection value; A monitoring system characterized in that the receiver determines whether the person being monitored is in a state where they need help based on the number of vibrations of the wireless tag obtained based on the acceleration detection value, and transmits a signal corresponding to the state of the person being monitored in accordance with that determination.

15. The monitoring system according to claim 14, A monitoring system characterized in that when the receiver determines, based on the acceleration detection values ​​in three orthogonal axis directions, that the person being monitored is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the receiver determines that the person being monitored has taken action to get out of bed based on the number of vibrations of the wireless tag obtained based on the acceleration detection values.

16. An acceleration sensor; a wireless circuit for transmitting a sensor signal including an acceleration detection value acquired by the acceleration sensor; a wireless tag comprising: a receiver that receives the sensor signal and determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection value; A monitoring system characterized in that the receiver determines that the person being monitored needs help based on the total amount of time the wireless tag is in a vibrating state, a state determined based on the acceleration detection value, and transmits a signal corresponding to the state of the person being monitored in accordance with this determination.

17. The monitoring system according to claim 16, A monitoring system characterized in that when the receiver determines, based on the acceleration detection values ​​in three orthogonal axes, that the person being monitored is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the receiver determines that the person being monitored has taken action to get out of bed based on the total time that the wireless tag is in a vibrating state, a state determined based on the acceleration detection values.

18. The monitoring system according to any one of claims 14 to 17, A monitoring system, characterized in that the signal according to the state of the person being monitored indicates the state of the person being monitored.

19. The monitoring system according to any one of claims 14 to 18, A monitoring system characterized in that the receiver determines that the person being monitored is in a state where they need help based on the vibration amount of the wireless tag obtained based on the acceleration detection value, and transmits a signal corresponding to the state of the person being monitored in accordance with that determination.

20. The monitoring system according to any one of claims 14 to 19, The radio circuit A monitoring system characterized in that the sensor signal is transmitted at a frequency according to the acceleration detection value.

21. A wireless tag, An acceleration sensor; a computing device that determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection value acquired by the acceleration sensor; a wireless circuit for transmitting a signal according to the state of the person being watched over; the computing device determines that the person being watched over needs help based on the number of vibrations of the wireless tag obtained based on the acceleration detection value; The wireless tag is characterized in that the wireless circuit transmits a signal corresponding to the state of the person being monitored in response to the judgment.

22. 22. The wireless tag according to claim 21, The wireless tag is characterized in that when the computing device determines, based on the acceleration detection values ​​in three orthogonal axes, that the person being monitored is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the computing device determines that the person being monitored has taken action to get out of bed based on the number of vibrations of the wireless tag obtained based on the acceleration detection values.

23. A wireless tag, An acceleration sensor; a computing device that determines the state of the person being watched over to which the wireless tag is attached based on the acceleration detection value acquired by the acceleration sensor; a wireless circuit for transmitting a signal according to the state of the person being watched over; The wireless tag is characterized in that the computing device determines that the person being monitored is in a state where they need help based on the total amount of time the wireless tag is in a vibrating state, a state determined based on the acceleration detection value, and the wireless circuit transmits a signal corresponding to the state of the person being monitored in accordance with this determination.

24. 24. The wireless tag according to claim 23, The wireless tag is characterized in that when the computing device determines, based on the acceleration detection values ​​in three orthogonal axes, that the person being monitored is in one of the following positions: lateral recumbent position with head upright, semi-sitting position, long-sitting position, or edge-sitting position, the computing device determines that the person being monitored has taken action to get out of bed based on the total time that the wireless tag is in a vibrating state, a state determined based on the acceleration detection values.

25. 25. The wireless tag according to claim 21, A wireless tag characterized in that the signal corresponding to the state of the person being watched over indicates the state of the person being watched over.

26. 26. The wireless tag according to claim 21, The wireless tag is characterized in that the computing device determines that the person being monitored is in a state where they need help based on the vibration amount of the wireless tag obtained based on the acceleration detection value, and the wireless circuit transmits a signal corresponding to the state of the person being monitored in accordance with the determination.

27. 27. The wireless tag according to claim 21, The radio circuit A wireless tag characterized by transmitting a signal corresponding to the state of the person being watched over at a frequency corresponding to the detected acceleration value.

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