JP2022011939A - Body motion detector - Google Patents

Abstract

To provide a body motion detector capable of simplifying work related to data evaluation.SOLUTION: A body motion detector comprises: a pressure sensitive pipe in which an internal pressure varies according to body motion of a subject; a pressure sensor 230 for measuring an internal pressure of the pressure sensitive pipe; a body motion determination part 2111 for determining presence of the body motion of the subject, on the basis of a pressure measurement result by the pressure sensor 230; a storage part 212 for storing the pressure measurement result as data; and a communication part 280 for outputting the data stored in the storage part 212 to an external unit. The storage part 212 has a data block for storing, as body motion absence immediate before data, a pressure measurement result in a prescribed period until it is determined that there is no body motion, and a data block for storing, as normal time data, the pressure measurement result in the prescribed period when it is determined that there is body motion. The communication part 280 can output the body motion absence immediate before data and the normal time data.SELECTED DRAWING: Figure 3

Description

The present invention relates to a body motion detection device.

A body movement detection device (apnea detection device) that detects the body movement (breathing) of a subject is known for the purpose of suppressing the death of infants and the like due to sudden infant death syndrome (hereinafter abbreviated as SIDS). For example, Patent Document 1).

In the body movement detection device of Patent Document 1, a detection mat provided with a pressure-sensitive part for detecting body movement is laid under a mattress, a futon, or the like, and the body movement by the subject is captured as a pressure change of the pressure-sensitive part of the subject. It is configured to be able to detect body movements.

Japanese Unexamined Patent Publication No. 2000-107154

By the way, in the diagnosis of SIDS, the evaluation is made by comparing the data of the pressure change immediately before the inanimate movement state (data immediately before the intangible movement) with the data of the pressure change in the normal state (tangible movement state) (normal time data). It is known that doing so may be effective.

The body motion detection device of Patent Document 1 is configured to be able to output pressure changes, detection results, and the like via an external output terminal. However, in Patent Document 1, the data immediately before the intangible movement and the normal time data are not separately output. Therefore, in order to perform the above evaluation, it is necessary for doctors and the like to separate and evaluate the data immediately before immobility and the normal time data from the output data, so it is troublesome to separate the data. There was a problem such as this.

An object of the present invention is to provide a body motion detection device that can simplify the work related to data evaluation.

The body motion detection device of the present invention includes a pressure-sensitive member whose internal pressure changes according to the body movement of a subject, a pressure measuring device for measuring the internal pressure of the pressure-sensitive member, and a pressure measurement result by the pressure measuring device. A body movement determination unit that determines the presence or absence of the body movement of the subject based on the above, a storage unit that stores the pressure measurement result as data, and a data output that outputs the data stored in the storage unit to an external device. The storage unit has a unit, and when the body movement determination unit determines that there is no body movement, the storage unit obtains the pressure measurement result for a predetermined period until it is determined that there is no body movement. A data storage unit immediately before involuntary movement, which is stored as data immediately before involuntary movement, and a normal time data storage unit, which stores the pressure measurement result for a predetermined period in which the body movement determination unit determines that the body movement is present, as normal time data. The data output unit is characterized in that it is configured to be able to output the data immediately before the intangible movement and the normal time data.

In the present invention, the storage unit that stores the pressure measurement result as data is the intangible movement immediately preceding data storage unit that stores the pressure measurement result for a predetermined period until it is determined that there is no body movement as the intangible movement immediately preceding data, and the body. It has a normal time data storage unit that stores pressure measurement results for a predetermined period determined to have motion as normal time data. The data output unit is configured to be able to output the data immediately before the intangible movement and the data at the normal time. As a result, in the data output from the body movement detection device, the data immediately before the body movement and the normal time data are separated, so that a person who evaluates the data such as a doctor can select the data immediately before the body movement and the normal time data. There is no need to separate. Therefore, the work related to the evaluation of the data can be simplified.

In the body movement detection device of the present invention, it is preferable that the predetermined period in the normal time data is the same as the predetermined period in the data immediately before the no-body movement.
In this configuration, since the predetermined period in the normal time data and the predetermined period in the data immediately before the involuntary movement are the same, it is possible to facilitate the evaluation of the data. Further, since the data capacity can be made equal between the normal time data and the data immediately before the intangible movement, these data can be efficiently stored in the storage unit.

In the body motion detection device of the present invention, the normal time data storage unit continuously updates the normal time data by updating the oldest stored pressure measurement result to the newest pressure measurement result. It is preferable to memorize in.
In this configuration, the normal time data storage unit continuously stores the normal time data by updating the oldest pressure measurement result to the newest pressure measurement result, so that the latest normal time data can be continuously stored with a small storage capacity. Can be memorized.

In the body motion detection device of the present invention, the storage unit has a plurality of storage blocks, one of the plurality of storage blocks is configured as the normal time data storage unit, and the other storage blocks are the same. It is preferable to configure it as a data storage unit immediately before intangible movement.
In this configuration, since the storage unit has a plurality of storage blocks for storing normal time data and data immediately before immobility, one storage unit can separately store a plurality of data. Therefore, for example, it is not necessary to provide a plurality of storage devices such as RAMs, and the configuration of the body motion detection device can be simplified.

In the body motion detection device of the present invention, the storage unit sequentially replaces the storage block constituting the normal time data storage unit with the storage block constituting the non-body motion immediately preceding data storage unit, while performing the normal time operation. It is preferable to store the data and the data immediately before the involuntary movement.
Here, since the data is usually rewritten frequently in the normal data storage unit, the storage block constituting the normal data storage unit tends to be deteriorated. However, in this configuration, since the data is stored while exchanging the storage blocks constituting the data storage unit at normal times, it is possible to prevent the storage blocks from being biased and deteriorated.

In the body motion detection device of the present invention, the body motion determination unit is temporarily intangible when the absolute value of the pressure measurement result by the pressure measuring device is equal to or less than a predetermined value for the first hour or more and less than the second hour. It is configured to determine that there is no body movement when the absolute value of the pressure measurement result by the pressure measuring device is equal to or less than a predetermined value for the second time or more, and the storage unit is configured to determine that there is no body movement. When the motion determination unit determines that the temporary intangible movement occurs more than a predetermined number of times, the data immediately before the temporary intangible movement that stores the pressure measurement result until the determination of the temporary intangible movement as the data immediately before the temporary intangible movement. It is preferable to have a storage unit.
In this configuration, the body movement determination unit determines that the movement is temporary inactivity when the absolute value of the pressure measurement value by the pressure measuring device is equal to or less than a predetermined value for the first hour or more and less than the second hour. Then, when the body movement determination unit determines that the movement is temporary inactivity more than a predetermined number of times, the storage unit stores the pressure measurement result until the determination as temporary inactivity as temporary data immediately before the inactivity. It is equipped with a data storage unit immediately before intangible movement. Therefore, although it is not determined that there is no body movement, the pressure measurement result in the case where the body movement is not detected temporarily can be stored, so that the data can be evaluated in more detail in the diagnosis of SIDS.

In the body movement detection device of the present invention, when the body movement determination unit determines that there is no body movement, the storage unit measures the pressure for a predetermined period after it is determined that there is no body movement. It is preferable to provide a post-movement data storage unit that stores the result as post-movement data.
In this configuration, the pressure measurement result for a predetermined period after it is determined that there is no body movement can be stored as post-body movement data, so that the data can be evaluated in more detail in the diagnosis of SIDS.

The schematic diagram which shows the outline of the body motion detection apparatus which concerns on 1st embodiment of this invention. The exploded perspective view which shows the outline of the detection mat of 1st Embodiment. The block diagram which shows the circuit structure of the monitoring apparatus of 1st Embodiment. The figure which shows the pressure change during the body movement detection of 1st Embodiment. The block diagram which shows the schematic structure of the storage part of 1st Embodiment. The figure which shows the data storage method of the storage part of 1st Embodiment. The figure which shows the data storage method of the storage part of 1st Embodiment. The figure which shows the data storage method of the storage part of 1st Embodiment. The block diagram which shows the circuit structure of the monitoring apparatus of 2nd Embodiment. The block diagram which shows the schematic structure of the storage part of 2nd Embodiment. The flowchart explaining the body motion detection method of 2nd Embodiment. The figure which shows the data migration of the storage part of 2nd Embodiment. The block diagram which shows the circuit structure of the monitoring apparatus of 3rd Embodiment. The figure which shows the pressure change during the body movement detection of the 3rd embodiment. The block diagram which shows the schematic structure of the storage part of 3rd Embodiment.

[First Embodiment]
The first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing an outline of the body motion detection device 1 of the present embodiment.
As shown in FIG. 1, the body motion detection device 1 includes a detection mat 100 and a monitor device 200.
The detection mat 100 is installed, for example, in a newborn bed or the like. Then, usually, a mattress or the like is placed on the upper part of the detection mat 100, and a newborn baby or the like as a subject is placed on the upper part of the mattress. The details of the detection mat 100 will be described later.

The monitoring device 200 is connected to the detection mat 100 by a connecting tube 10 made of resin or the like. The monitoring device 200 includes a case 201 and a nozzle 202 connecting the case 201 and the connecting tube 10, and is configured to be capable of measuring pressure fluctuations generated inside the detection mat 100. A device fixture 20 is attached to the back side of the monitor device 200. The details of the monitor device 200 will be described later.

The device mounting tool 20 has a mounting tool main body 21 formed in a substantially rectangular plate shape, and the mounting tool main body 21 is provided with an opening 22 in the central portion along the longitudinal direction. The fixture main body 21 is configured to be bendable in the longitudinal direction. As a result, the monitor device 200 can be attached to, for example, the outer frame of the newborn bed.

[Detection mat 100]
FIG. 2 is an exploded perspective view showing an outline of the detection mat 100.
As shown in FIG. 2, the detection mat 100 includes a cover 110, an upper plate 120, a lower plate 130, a cushion material 140, a pressure-sensitive pipe 150, a connecting pipe 160, and the like.

The cover 110 is formed in a substantially rectangular shape, and houses the upper plate 120, the lower plate 130, the cushion material 140, the pressure-sensitive pipe 150, the connecting pipe 160, and the like inside. Further, the cover 110 is integrally formed by welding the upper cover 111 and the lower cover 112, and is made of a resin member such as a soft plastic sheet or a cloth. As a result, when measuring the change in the internal pressure of the pressure-sensitive pipe 150, the influence on the measurement sensitivity is reduced.

The upper plate 120 is formed of, for example, a resin plate, a wooden plate, a cardboard, or the like in a substantially rectangular plate shape, and is configured to be elastically deformable. A fulcrum portion 121 is formed on the outer peripheral portion of the upper plate 120 toward the lower plate 130, and is configured to act as a leaf spring with the fulcrum portion 121 as a fulcrum. As a result, the upper plate 120 is elastically deformed according to the breathing of the subject, so that the internal pressure of the pressure-sensitive pipe 150 arranged in contact with the upper plate 120 changes according to the breathing of the subject. Has been done.

The lower plate 130 is formed of, for example, a hard member such as a metal plate or a hard plastic so as not to be elastically deformed. The lower plate 130 is formed in a substantially rectangular plate shape, and a pressure-sensitive pipe 150 is arranged in the central portion along the longitudinal direction. Further, cushioning materials 140 are arranged at the four corners of the lower plate 130.

As described above, the cushion material 140 is arranged at the four corners of the lower plate 130, and is fixed to the lower plate 130 by, for example, bolts or an adhesive. As a result, for example, even if the four corners of the detection mat 100 collide with the frame of the newborn bed or the like while carrying the detection mat 100, the impact is alleviated by the cushion material 140, so that the detection mat 100 can be used. It can be prevented from being damaged.

The pressure-sensitive pipe 150 is composed of, for example, an elastically deformable pipe-shaped hollow body such as a silicon tube. One end 151 of the pressure-sensitive pipe 150 is sealed with a stopper or the like. Further, one end of the connecting pipe 160 is connected to the other end portion 152. The other end of the connecting pipe 160 is connected to the connecting tube 10 (see FIG. 1). As a result, the pressure-sensitive pipe 150 is connected to the monitoring device 200 via the connecting pipe 160 and the connecting tube 10.

As described above, the internal pressure of the pressure-sensitive pipe 150 changes according to the respiration of a subject such as a newborn baby placed on the upper part of the upper cover 111. In the present embodiment, as will be described later, the change in the internal pressure of the pressure-sensitive pipe 150 is measured by the pressure sensor 230 of the monitor device 200 so that the body movement of the subject can be detected. That is, the pressure-sensitive pipe 150 is an example of the pressure-sensitive member of the present invention.
The pressure-sensitive pipe 150 is not limited to the above configuration, and may be formed in the shape of a flat balloon, for example, and may be configured so that the pressure fluctuates according to the respiration of a newborn baby or the like.

[Circuit configuration of monitor device 200]
FIG. 3 is a block diagram showing an outline of the circuit configuration of the monitor device 200.
As shown in FIG. 3, the monitor device 200 includes a control circuit 210, a motion sensor 220, a pressure sensor 230, an operation unit 240, a display unit 250, a buzzer 260, an LED 270, a communication unit 280, and a contact output housed in the case 201. It is configured to include a unit 290 and the like.
The monitor device 200 may be configured to include a battery as a power source, or may be configured to be able to supply current from a household outlet by an AC adapter or the like.

The control circuit 210 is provided, for example, on a circuit board or the like, and includes a control device 211 and a storage unit 212. The control circuit 210 is electrically connected to a motion sensor 220, a pressure sensor 230, an operation unit 240, a display unit 250, a buzzer 260, an LED 270, a communication unit 280, a contact output unit 290, and the like, and controls their operations.

[Control device 211]
The control device 211 is composed of an arithmetic unit such as a microcomputer or a CPU (Central Processing Unit), and includes a body movement determination unit 2111 and an alarm signal output unit 2112.
The body movement determination unit 2111 determines the presence or absence of body movement of the subject based on the measurement result of the pressure sensor 230.

FIG. 4 is a diagram showing an example of a change in the internal pressure of the pressure sensitive pipe 150 during body motion detection by the body motion detection device 1.
As shown in FIG. 4, when a subject such as a newborn baby is placed on the upper part of the detection mat 100, the internal pressure of the pressure-sensitive pipe 150 changes according to the body movement of the subject. Specifically, when the subject is inhaling, the internal pressure of the pressure-sensitive pipe 150 increases, and when the subject is exhaling, the internal pressure decreases. Therefore, the change in the internal pressure of the pressure-sensitive pipe 150 according to the body movement of the subject is measured by the pressure sensor 230.
The body movement determination unit 2111 determines whether or not the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are measured at regular intervals. Specifically, in the body movement state shown on the left side of FIG. 4, the body movement determination unit 2111 measures the pressure above the first threshold value D1 and the pressure below the second threshold value D2 at regular intervals. It is determined that the motion is detected normally. On the other hand, in the inactive state shown on the right side of FIG. 4, the body movement determination unit 2111 does not measure the pressure above the first threshold value D1 and the pressure below the second threshold value D2 during the determination time TN. Is not detected. The determination time TN is set to, for example, 15 seconds.
Further, the body movement determination unit 2111 may be configured to interrupt the determination of the subject's body movement when the subject is not on the detection mat.

Returning to FIG. 3, the alarm signal output unit 2112 outputs an alarm signal based on the determination result by the body movement determination unit 2111. Specifically, when the body movement determination unit 2111 determines that the subject's body movement is not detected, the alarm signal output unit 2112 outputs an alarm signal to the buzzer 260 and the LED 270.

[Memory unit 212]
FIG. 5 is a block diagram showing a schematic configuration of the storage unit 212.
As shown in FIG. 5, the storage unit 212 is composed of a RAM (Random Access Memory), a ROM (Read Only Memory), and the like.
In the present embodiment, the storage unit 212 includes two areas, a data storage area and an address storage area. The data storage area includes six data blocks of the first to sixth data blocks, and the address storage area includes six address blocks of the first to sixth address blocks.
Then, in the present embodiment, for example, the normal time data is stored in the first data block, and the data immediately before the intangible movement is stored in the second to sixth data blocks. In addition, address data is stored in each address block. The details of the data storage area and the address storage area will be described later.

Here, the data immediately before no body movement is a pressure measurement result for a predetermined time until it is determined that there is no body movement when it is determined by the body movement determination unit 2111 that there is no body movement. Specifically, the data immediately before no body movement is a pressure measurement result for 5 minutes immediately before it is determined that no body movement is detected. The second to sixth data blocks in which the data immediately before the intangible movement is stored are an example of the data storage unit immediately before the intangible movement of the present invention.

The normal time data is a pressure measurement result for a predetermined period in which the body movement determination unit 2111 determines that there is body movement. Here, in the present embodiment, the pressure measurement result for 5 minutes, which is determined to have body movement, is stored in the first data block as normal data. That is, the predetermined period of the normal time data and the predetermined time of the data immediately before the involuntary movement are the same. The first data block for storing normal data is an example of the normal data storage unit of the present invention.
That is, in the present embodiment, the storage unit 212 has six data blocks, the first data block is configured as a normal time data storage unit, and the other second to sixth data blocks are data storage units immediately before immobilization. It is configured as. Each data block is an example of a storage block of the present invention.
Further, the details of the method of storing the normal time data and the data immediately before the involuntary movement in the storage unit 212 will be described later.

[Human sensor 220]
Returning to FIG. 3, the motion sensor 220 is configured to include, for example, a pyroelectric sensor, an AC amplifier circuit, or the like, and is configured to be able to detect a user such as a nurse who assists a newborn baby. Then, in the present embodiment, when the user is detected by the motion sensor 220, the body movement determination unit 2111 is configured to interrupt the body movement determination. This makes it possible to prevent, for example, when a newborn baby is picked up by a nurse or the like, it is erroneously determined that there is no body movement.

[Pressure sensor 230]
The pressure sensor 230 is connected to the pressure-sensitive pipe 150 of the detection mat 100 via the connecting pipe 160 and the connecting tube 10, and is configured to be capable of measuring changes in the internal pressure of the pressure-sensitive pipe 150. The pressure sensor 230 is configured to include, for example, a diaphragm, a strain gauge for detecting the amount of strain in the diaphragm, and the like. The pressure sensor 230 is an example of the pressure measuring device of the present invention.
Further, the pressure sensor 230 is provided with a filter unit (not shown) that gradually releases the pressure inside the pressure sensor 230. As a result, the internal pressure of the pressure-sensitive pipe 150 is gradually released through the filter portion.

[Operation unit 240]
The operation unit 240 is for operating the monitor device 200, and includes a communication button 241, a stop button 242, a power button 243 (see FIG. 1), and the like.
In the present embodiment, when the communication button 241 is pressed, the operation unit 240 outputs a communication operation signal to the control device 211. When the communication operation signal is input, the control device 211 outputs the normal time data and the data immediately before immobility stored in the storage unit 212 to the external device via the communication unit 280.
Further, when the stop button 242 is pressed, the operation unit 240 outputs a stop signal to the control device 211. When the stop signal is input to the control device 211, the body movement determination unit 2111 interrupts the body movement determination.

[Display unit 250]
The display unit 250 is composed of a liquid crystal display (LCD) or the like. In the present embodiment, when the body movement of the subject is detected by the body movement determination unit 2111, a bar graph is displayed on the display unit 250. Then, the bar graph displayed on the display unit 250 swings up and down according to the pressure change measured by the pressure sensor 230.
The display unit 250 is not limited to displaying a bar graph, and may be configured to digitally display the measured value of the pressure sensor 230, or may display due to fluctuations in the measured value. It may be configured to change the color.

[Buzzer 260]
The buzzer 260 is configured to input an alarm signal output from the alarm signal output unit 2112 of the control device 211 and emit an alarm sound.

[LED270]
The LED 270 is configured to emit light based on the signal output from the control device 211. In the present embodiment, the LED 270 is composed of a high-brightness three-color light emitting diode (Light Emitting Diode).
The LED 270 blinks red when an alarm signal output from the alarm signal output unit 2112 of the control device 211 is input. As a result, the top surface of the case 201 flashes red.
Further, in the present embodiment, when the body movement determination unit 2111 interrupts the determination of the body movement of the subject, the interruption signal is output to the LED 270. Then, the LED 270 blinks green when the interruption signal is input. As a result, the top surface of the case 201 flashes green.

[Communication unit 280]
The communication unit 280 is provided with a USB port or the like, and is configured to be able to communicate with an external device via a USB cable or the like. Then, in the present embodiment, the communication unit 280 is configured to be able to output the normal time data and the data immediately before the immobility stored in the storage unit 212 to the external device. That is, the communication unit 280 is an example of the data output unit of the present invention.
The communication unit 280 is not limited to the above configuration, and may be configured to include, for example, a module such as a wireless LAN or Bluetooth (registered trademark).

[Contact output unit 290]
The contact output unit 290 is configured by a photomos relay or the like, and when an alarm signal is input from the alarm signal output unit 2112, the contact is turned on. For example, a transmitter or the like is connected to the contact output unit 290, and it is possible to configure the contact output unit 290 so that the output of an alarm signal can be transmitted to an external device.

[Data storage method]
Next, a data storage method by the storage unit 212 will be described.
6 to 8 are diagrams showing a data storage method of the storage unit 212.
First, as shown in FIG. 6, when the body movement measurement is started, for example, the pressure measurement result in the first data block of the storage unit 212, that is, the storage of the normal time data is started. Here, in the present embodiment, each data block has a storage capacity of 10,000 addresses of 0000 to 9999. Then, the pressure measurement result for 0.1 seconds is stored in one address. That is, each data block is configured to be able to store the pressure measurement result for 1000 seconds. Then, after storing the pressure measurement results for 1000 seconds, each data block continuously updates the normal time data by updating the oldest stored pressure measurement results to the newest pressure measurement results. Remember.

Here, for example, when the alarm is generated at the time when the pressure measurement result is stored in the 4999 address, that is, when the body movement determination unit 2111 determines that the inactivity has occurred, the storage unit 212 is the first at that time. Stop storing the pressure measurement result in the data block. Then, the storage unit 212 stores the address data of 2000 to 4999 in the first address block of the address storage area. That is, each address block stores the address in which the data immediately before the immobility is stored in each data block as the address data. As a result, it is stored in the first address block that the data immediately before the immobility is stored in the 3000 addresses (capacity for 5 minutes) of 2000 to 4999 of the first data block.

Next, as shown in FIG. 7, when the latest data immediately before immobility is stored in the first data block, the pressure measurement result in the second data block of the storage unit 212, that is, the storage of the normal time data is stored. It will be started.
Here, for example, if the power of the monitoring device 200 is turned off when the pressure measurement result is stored in the 3999 address, the storage unit 212 stops storing the pressure measurement result in the second data block at that time. .. Then, the storage unit 212 shifts the address data (2000 to 4999) in which the data immediately before the intangible movement in the first data block described above is stored from the first address block to the second address block, and stores the address data of 1000 to 3999. Store in the first address block. As a result, it is stored in the first address block that the normal data is stored in the 3000 addresses (capacity for 5 minutes) of 1000 to 3999 of the second data block.
After that, when the power of the monitoring device 200 is turned on, the pressure measurement result of the storage unit 212 in the second data block, that is, the storage of the normal time data is started. When the power of the monitor device 200 is turned off again in this state, the storage unit 212 does not transfer the data of each address block, and the address data immediately before the power of the monitor device 200 is turned off is used as the first address block. Overwrite.

On the other hand, as shown in FIG. 8, for example, if an alarm occurs at the time when the pressure measurement result is stored at the 6999 address, the storage unit 212 stops storing the pressure measurement result in the second data block at that time. do. Then, the storage unit 212 shifts the address data (2000 to 4999) in which the data immediately before the intangible movement in the first data block described above is stored from the first address block to the second address block, and stores the address data of 4000 to 6999. Store in the first address block. As a result, it is stored in the first address block that the data immediately before the immobility is stored in the 3000 addresses (capacity for 5 minutes) of 4000 to 6999 of the second data block.

After that, when the latest data immediately before immobility is stored in the second data block, the pressure measurement result of the storage unit 212 in the third data block, that is, the storage of the normal time data is started, and the above processing is performed. Is repeated.
As described above, in the present embodiment, the storage unit 212 stores the normal time data and the data immediately before the intangible movement while sequentially exchanging the data block for storing the normal time data and the data block for storing the data immediately before the intangible movement. It is configured as follows.

[Effect of the first embodiment]
In the present embodiment as described above, the following effects can be obtained.
(1) In the present embodiment, the storage unit 212 that stores the pressure measurement result as data has a data block that stores the pressure measurement result for 5 minutes until it is determined that there is no body movement as data immediately before the body movement, and the body. It has a data block that stores the pressure measurement result for 5 minutes, which is determined to have motion, as normal data. The communication unit 280 is configured to be able to output the data immediately before the intangible movement and the data at the normal time. As a result, in the data output from the body movement detection device 1, the data immediately before the body movement and the normal time data are separated, so that a person who evaluates the data such as a doctor can use the data immediately before the body movement and the normal time data. There is no need to separate. Therefore, the work related to the evaluation of the data can be simplified.

(2) In the present embodiment, since the normal time data and the data immediately before the intangible movement are data for the same period, it is possible to facilitate the evaluation of the data. Further, since the data capacity can be made equal between the normal time data and the data immediately before the intangible movement, these data can be efficiently stored in the storage unit 212.

(3) In the present embodiment, each data block continuously stores the normal time data by updating the oldest stored pressure measurement result to the newest pressure measurement result, so that the amount of storage is small. The latest normal data can be continuously stored in capacity.

(4) In the present embodiment, since the storage unit 212 has a plurality of data blocks for storing normal time data and data immediately before immobility, one storage unit 212 can separate and store a plurality of data. can. Therefore, for example, it is not necessary to provide a plurality of storage devices such as RAMs, and the configuration of the body motion detection device 1 can be simplified.

(5) In the present embodiment, since the storage unit 212 stores data while exchanging the data blocks constituting the normal data storage unit, it is possible to prevent the data blocks from being biased and deteriorated.

[Second Embodiment]
Next, the second embodiment of the present invention will be described with reference to the drawings.
The second embodiment is different from the first embodiment in that the storage unit 212A includes a first block for storing normal time data and second to sixth blocks for storing data immediately before immobility. In the second embodiment, the same or similar configurations as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

[Circuit configuration of monitor device 200A]
FIG. 9 is a block diagram showing an outline of the circuit configuration of the monitor device 200A of the second embodiment. Similar to the monitor device 200 of the first embodiment described above, the monitor device 200A includes a control circuit 210A, a motion sensor 220, a pressure sensor 230, an operation unit 240, a display unit 250, a buzzer 260, and an LED 270 housed in the case 201. , Communication unit 280, contact output unit 290, and the like.
In the present embodiment, the control circuit 210A includes a control device 211A and a storage unit 212A.

[Control device 211A]
Similar to the control device 211 of the first embodiment described above, the control device 211A is composed of an arithmetic unit such as a microcomputer or a CPU (Central Processing Unit), and includes a body movement determination unit 2111A and an alarm signal output unit 2112. Is configured with.
The body movement determination unit 2111A determines whether or not the subject has body movement based on the measurement result of the pressure sensor 230, similarly to the body movement determination unit 2111 of the first embodiment described above. Specifically, it is determined whether or not the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are measured during the determination time TN (see FIG. 4).

FIG. 10 is a block diagram showing a schematic configuration of the storage unit 212A.
As shown in FIG. 10, the storage unit 212A is configured by a RAM (Random Access Memory), a ROM (Read Only Memory), or the like, and includes six storage blocks of the first to sixth blocks.
Then, in the present embodiment, the normal time data is stored in the first block, and the data immediately before the intangible movement is stored in the second to sixth blocks.

[Body movement detection method]
Next, a body motion detection method using the body motion detection device 1 of the present embodiment will be described.
FIG. 11 is a flowchart illustrating the interruption process during body movement detection.
As shown in FIG. 11, first, the monitoring device 200A starts the body motion measurement by the pressure sensor 230 when the power button 243 is pressed (step S1).

Next, when the body movement measurement is started in step S1, the storage of the pressure measurement result (normal time data) in the first block of the storage unit 212A is started (step S2). At this time, in the first block, the normal time data is continuously stored by updating the oldest stored pressure measurement result to the newest pressure measurement result.

Next, the control device 211A determines whether or not the power of the monitor device 200A has been turned off (step S3).
If YES is determined in step S3, that is, when the power button 243 is pressed, the control circuit 210A turns off the power of the monitoring device 200A and proceeds to step S7 described later.

On the other hand, if NO is determined in step S3, the body movement determination unit 2111A determines whether or not no body movement has occurred (step S4). Specifically, the body movement determination unit 2111A determines that no body movement has occurred when the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are not measured in 15 seconds, and the body movement determination unit 2111A determines that no body movement has occurred for 15 seconds. When the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are measured, it is determined that no intangible movement has occurred.

If NO is determined in step S4, the process returns to step S2 and the process is repeated. That is, in the present embodiment, the normal time data is stored in the first block of the storage unit 212A while being updated until it is determined that the power of the monitor device 200A is turned off or that no body movement has occurred.
On the other hand, if YES is determined in step S4, the data immediately before the intangible movement is stored (step S5). At this time, among the pressure measurement results stored in the first block of the storage unit 212A, the data for 5 minutes immediately before the occurrence of the intangible movement is stored as the data immediately before the intangible movement. That is, when intangible movement occurs, the data immediately before the intangible movement is stored in the first block.

Further, when the intangible movement occurs, the buzzer 260 emits an alarm sound, and the LED 270 blinks in red, so that the user such as a nurse recognizes that the intangible movement has occurred. Then, usually, a user such as a nurse turns off the power of the monitor device 200A (step S6) and confirms the state of the newborn baby.

Next, when the power button 243 is pressed and the power of the monitor device 200A is turned on (step S7), the control device 211A determines whether or not there is a communication request (step S8). Here, in the present embodiment, when the control device 211A is connected to the external device via the communication unit 280, the control device 211A is configured to be able to receive a communication request from the external device. Then, as described above, the control device 211A is configured to determine whether or not there is a communication request from the external device when the power of the monitor device 200A is turned on.

If NO is determined in step S8, the process proceeds to step S10, which will be described later.
On the other hand, if YES is determined in step S8, the control device 211A outputs the normal time data and the data immediately before immobility stored in the storage unit 212A to the external device via the communication unit 280 (step S9). ).

Next, the control device 211A determines whether or not the data immediately before the immobility is stored in the first block of the storage unit 212A (step S10). Here, when the power of the monitor device 200A is turned off in step S3, since the normal time data is stored in the first block, it is determined as NO in step S10. In this case, the process returns to step S1 and the process is repeated.

On the other hand, as described above, when the intangible movement occurs, the data immediately before the intangible movement is stored in the first block in step S5, so that it is determined as YES in step S10. In this case, the data stored in the storage unit 212A is transferred (step S11).

FIG. 12 is a diagram showing data migration of the storage unit 212A.
As shown in FIG. 12, before the data is transferred in step S11, the intangible motion immediately preceding data A stored in step S5 is stored in the first block of the storage unit 212A. Further, in the second to sixth blocks, the intangible motion immediately preceding data B to F stored before the intangible motion immediately preceding data A are stored. Of the data B to F immediately before the intangible movement, the data B immediately before the intangible movement is the newest data, and the data F immediately before the intangible movement is the oldest data. That is, the data immediately before the intangible movement is stored in the sixth block to the second block in the order in which the intangible movement occurs.

Then, when the data is transferred in step S11, the data F immediately before the intangible movement stored in the sixth block is erased, and the data E immediately before the intangible movement stored in the fifth block is transferred to the sixth block. Then, the intangible motion immediately preceding data A to D stored in the first to fourth blocks are transferred to the second to fifth blocks, respectively. That is, the oldest data is erased, and the data A to E immediately before the intangible movement are stored in the second to sixth blocks in the order of newest data.
Then, by returning to step S1 and repeating the process, the normal time data is stored in the first block. That is, in the present embodiment, the normal data is always stored in the first block.

[Effect of the second embodiment]
In the present embodiment as described above, the following effects can be obtained.
(6) In the present embodiment, the normal time data is stored in the first block, and the data immediately before the intangible movement is stored in the second to sixth blocks, so that a person who evaluates the data such as a doctor can store the data immediately before the intangible movement. And normal data can be easily identified. Therefore, the work related to the evaluation of the data can be simplified.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings.
In the third embodiment, the storage unit 212B is different from the first and second embodiments in that it has a storage block for storing data immediately before temporary immobility. In the third embodiment, the same or similar configurations as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

[Circuit configuration of monitor device 200B]
FIG. 13 is a block diagram showing an outline of the circuit configuration of the monitor device 200B of the third embodiment. The monitor device 200B has a control circuit 210B, a motion sensor 220, a pressure sensor 230, an operation unit 240, and a display unit 250, which are housed in the case 201, similarly to the monitor devices 200 and 200A of the first and second embodiments described above. It is configured to include a buzzer 260, an LED 270, a communication unit 280, a contact output unit 290, and the like.
In the present embodiment, the control circuit 210B includes a control device 211B and a storage unit 212B.

[Control device 211B]
The control device 211B is composed of an arithmetic unit such as a microcomputer or a CPU (Central Processing Unit), like the control devices 211 and 211A of the first and second embodiments described above, and includes a body movement determination unit 2111B and an alarm signal. It is configured to include an output unit 2112.
The body movement determination unit 2111B determines whether or not the subject has body movement based on the measurement result of the pressure sensor 230, similarly to the body movement determination units 211, 2111A of the first and second embodiments described above. Specifically, it is determined whether or not the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are measured during the determination time TN (see FIG. 4).
Further, in the present embodiment, the body movement determination unit 2111B determines whether or not a temporary intangible movement in which no body movement is temporarily detected has occurred.

FIG. 14 is a diagram showing an example of a change in the internal pressure of the pressure-sensitive pipe 150 during the body motion detection of the present embodiment.
As shown in FIG. 14, in the present embodiment, when the determination time TM or more and the absolute value of the pressure measurement result by the pressure sensor 230 is not more than a predetermined value, the body movement determination unit 2111B determines that the body movement is temporary.
Here, in the present embodiment, the determination time TM is set to a time shorter than the determination time TN for determining the presence or absence of body movement of the subject. For example, when the determination time TN is set to 15 seconds, the determination time TM is set to 10 seconds. In this case, if the pressure above the first threshold value D1 and the pressure below the second threshold value D2 are not measured for 10 seconds or more and less than 15 seconds, the body movement determination unit 2111B determines that the body is temporarily inactive. .. Further, when the pressure of the first threshold value D1 or more and the pressure of the second threshold value D2 or less are not measured for 15 seconds or more, the body movement determination unit 2111B determines that the body is inactive. The determination time TM is an example of the first time of the present invention, and the determination time TN is an example of the second time of the present invention.

[Memory unit 212B]
FIG. 15 is a block diagram showing a schematic configuration of the storage unit 212B.
As shown in FIG. 15, similarly to the storage unit 212A of the second embodiment described above, the storage unit 212B is configured to include six storage blocks of the first to sixth blocks.
Then, in the present embodiment, the data immediately before the temporary intangible movement is stored in the third block, the fifth block, and the sixth block.

Here, the data immediately before the temporary intangible movement is the pressure measurement result of the determination time TM until the temporary inactive movement is determined by the body movement determination unit 2111B. Then, in the present embodiment, when the body movement determination unit 2111B determines that the body movement is temporary inactivity more than a predetermined number of times, the pressure measurement result of the determination time TM until the determination is made as temporary inactivity after the predetermined number of times is temporary. It is stored as data just before the intangible movement. For example, when the temporary intangible movement is determined twice or more after the power is turned on, the pressure measurement result of the determination time TM from the second time onward until the temporary intangible movement is determined is as the data immediately before the temporary intangible movement. It will be remembered.

Specifically, when the body movement determination unit 2111B determines the temporary inactivity twice, the pressure measurement result of the determination time TM until the second determination of the temporary inactivity is stored in the first block. To. Then, the data transfer process as in the first embodiment described above is performed, and the pressure measurement result stored in the first block is transferred to the second block. That is, in the present embodiment, the second to sixth blocks function as the data storage unit immediately before the intangible movement and the data storage unit immediately before the temporary intangible movement of the present invention.
In this embodiment, the alarm signal output unit 2112 may be configured to output an alarm signal even when the temporary inactivity is determined twice or more after the power is turned on.

[Effect of the third embodiment]
In the present embodiment as described above, the following effects can be obtained.
(7) In the present embodiment, the body movement determination unit 2111B determines that the body movement is temporarily absent when the absolute value of the pressure measurement result by the pressure sensor 230 is equal to or less than a predetermined value while it is TM or more and less than TN. Then, when the body movement determination unit 2111B determines that the temporary inactivity is more than a predetermined number of times, the storage unit 212B stores the pressure measurement result until the determination of the temporary inactivity as the data immediately before the temporary inactivity. .. Therefore, although it is not determined that there is no body movement, the pressure measurement result in the case where the body movement is not detected temporarily can be stored, so that the data can be evaluated in more detail in the diagnosis of SIDS.

[Modification example]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.
In each of the above embodiments, the alarm signal output unit 2112 is configured to output an alarm signal to the buzzer 260 and the LED 270, but is not limited thereto. For example, the alarm signal output unit 2112 may be configured to output an alarm signal to an external device such as a management device connected via the communication unit 280. In this case, the buzzer 260 and the LED 270 may not be provided on the monitor devices 200 and 200A.

In each of the above-described embodiments, the storage units 212, 212A, and 212B are configured to store the pressure measurement results during normal times and the pressure measurement results until it is determined that there is no body movement, but the present invention is not limited thereto. .. For example, the storage unit may include a post-movement data storage unit that stores the pressure measurement result for a predetermined period after it is determined that there is no body movement as post-body movement data.
In this configuration, the pressure measurement result for a predetermined period after it is determined that there is no body movement can be stored as post-body movement data. Therefore, the data can be evaluated in more detail in the diagnosis of SIDS. Can be done.

1 ... Body motion detection device, 10 ... Connecting tube, 20 ... Device fixture, 100 ... Detection mat, 110 ... Cover, 120 ... Upper plate, 130 ... Lower plate, 140 ... Cushion material, 150 ... Pressure sensitive pipe (pressure sensitive) (Member), 160 ... Connection pipe, 200, 200A, 200B ... Monitor device, 201 ... Case, 210, 210A, 210B ... Control circuit, 211, 211A, 211B ... Control device, 212, 212A, 212B ... Storage unit, 220 ... Human sensor, 230 ... Pressure sensor (pressure measuring device), 240 ... Operation unit, 250 ... Display unit, 260 ... Buzzer, 270 ... LED, 280 ... Communication unit (data output unit), 290 ... Contact output unit, 2111, 2111A, 2111B ... Body movement determination unit 2112 ... Alarm signal output unit.

Claims (7)

A pressure-sensitive member whose internal pressure changes according to the subject's body movement,
A pressure measuring device that measures the internal pressure of the pressure-sensitive member,
A body movement determination unit that determines the presence or absence of the body movement of the subject based on the pressure measurement result by the pressure measuring device, and
A storage unit that stores the pressure measurement result as data,
It has a data output unit that outputs the data stored in the storage unit to an external device, and has.
The storage unit is
When the body movement determination unit determines that there is no body movement, the pressure measurement result for a predetermined period until it is determined that there is no body movement is stored as the data immediately before the body movement. Department and
It has a normal time data storage unit that stores the pressure measurement result for a predetermined period determined by the body movement determination unit as normal time data.
The data output unit is a body movement detection device characterized in that it is configured to be able to output the data immediately before the non-body movement and the normal time data. In the body motion detection device according to claim 1,
A body movement detection device characterized in that the predetermined period in the normal time data and the predetermined period in the data immediately before the no-body movement are the same. In the body motion detection device according to claim 1 or 2.
The normal time data storage unit is characterized in that it continuously stores the normal time data by updating the oldest stored pressure measurement result with the newest pressure measurement result. Motion detector. The body motion detection device according to any one of claims 1 to 3.
The storage unit has a plurality of storage blocks, one of the plurality of storage blocks is configured as the normal time data storage unit, and the other storage blocks are configured as the immobility immediately preceding data storage unit. A body movement detection device characterized by this. In the body motion detection device according to claim 4,
The storage unit stores the normal time data and the data immediately before the intangible movement while sequentially exchanging the storage block constituting the normal time data storage unit and the storage block constituting the data storage unit immediately before the intangible movement. A body motion detection device characterized by the ability to do so. The body motion detection device according to any one of claims 1 to 5.
When the absolute value of the pressure measurement result by the pressure measuring device is equal to or less than a predetermined value for the first hour or more and less than the second hour, the body movement determination unit determines that the person is temporarily absent, and determines that the person is temporarily inactive for the second hour or longer. During the period, when the absolute value of the pressure measurement result by the pressure measuring device is equal to or less than a predetermined value, it is determined that there is no body movement.
When the body movement determination unit determines that the temporary inactivity is more than a predetermined number of times, the storage unit stores the pressure measurement result until the determination of the temporary inactivity as data immediately before the temporary inactivity. A body movement detection device characterized by having a data storage unit immediately before temporary inactivity. The body motion detection device according to any one of claims 1 to 6.
When the body movement determination unit determines that there is no body movement, the storage unit stores the pressure measurement result for a predetermined period after the determination that there is no body movement as post-movement data. A body motion detection device characterized by having a post-body motion data storage unit.

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