JP3213216U - Pillow with built-in Doppler sensor - Google Patents

Abstract

A pillow with a built-in Doppler sensor that can make it easier to detect apnea during sleep, regardless of the sleeping posture of the measurement subject. SOLUTION: The position inside the pillow 10 is shifted from the longitudinal center to one end in the longitudinal direction, and one end in the lateral direction from the lateral center. A chest and heart that move due to breathing during sleep of the measurement subject by incorporating the Doppler sensor 13 in a posture in which a radio wave transmission surface faces one end in the short direction at a position shifted to the side And the Doppler sensor 13 so that the chest movement and pulsation due to breathing can be easily detected, and the body detected by the Doppler sensor 13 when the subject turns over. The amplitude of the motion signal waveform is made large so that it can be clearly recognized that the motion is due to rolling over. [Selection] Figure 1

Description

  The present invention relates to a pillow with a built-in Doppler sensor.

  Sleep apnea syndrome is a condition that causes respiratory arrest or hypopnea during sleep. The disease often has weak subjective symptoms. On the other hand, a technique for detecting an apnea state by detecting body movement or acceleration during sleep is known (for example, see Patent Documents 1 to 3).

  The sleep apnea test apparatus described in Patent Literatures 1 to 3 detects a sleep posture of the measurement subject from a three-dimensional acceleration sensor and a DC component obtained from the acceleration sensor, and from an AC component obtained from the acceleration sensor. Signal processing means for detecting the respiration rate and heart rate of the person to be measured, and information necessary for a sleep test or sleep apnea test can be obtained from a single acceleration sensor.

  However, since the acceleration obtained by respiration is not so large, there is a problem that either the breathing state or the apnea state may be erroneously estimated. In addition, when the person to be measured is lying on his / her side or lying down, the acceleration obtained by breathing is further reduced, and there is a problem that erroneous determination may increase.

  On the other hand, the prior art made to detect respiration using a Doppler sensor (or Doppler radar) is also known (see, for example, Patent Documents 4 to 6). In the sleep evaluation apparatus described in Patent Document 4, the radio wave output from the Doppler sensor installed at the bedside of the bed is made to reach mainly the chest, shoulders, etc. of the person under sleep, and the reflected wave from there Is input as a sensor signal to detect body movement (chest movement) accompanying the breathing of the measurement subject.

  In the sleep stage determination device described in Patent Literature 5, the breathing interval of the measurement subject is extracted based on the vibration detected by one microwave radar installed under the bedding on which the measurement subject lies. In the radiation imaging system described in Patent Document 6, the movement of the measurement subject due to respiration is detected by a Doppler sensor arranged in the vicinity of the measurement subject.

JP 2006-247374 A JP 2006-320733 A JP 2006-320734 A JP 2012-187349 A Japanese Patent Laying-Open No. 2015-97636 Japanese Patent Laying-Open No. 2015-208443

  By using a Doppler sensor as the body motion sensor, it becomes relatively easy to detect body motion due to breathing, regardless of the sleeping posture of the person being measured, compared to the case where an acceleration sensor is used. However, the prior arts described in Patent Documents 4 to 6 above are not necessarily not affected at all by the measurement subject's sleeping posture. The signal waveform detected by the Doppler sensor is a composite wave including a waveform representing the chest movement associated with the subject's breathing and a waveform representing body movement other than breathing such as turning over, and is due to body movement associated with breathing. This is because it is difficult to separate the waveform from the waveform due to body movement other than respiration.

  The present invention has been made to solve such problems, and aims to make it easier to detect apnea during sleep regardless of the measurement subject's sleeping posture. And

  In order to solve the above-described problems, in the present invention, the position inside the pillow is shifted from the central portion in the longitudinal direction toward one end in the longitudinal direction, and the central portion in the short direction. The Doppler sensor is built in such a position that the transmission surface of the radio wave faces one end side in the short direction at a position shifted to one end side in the short side direction.

  When detecting the respiratory state during sleep of the measurement subject, if the present invention configured as described above is used, the distance between the chest that moves due to breathing and the Doppler sensor is reduced, so that it is detected by the Doppler sensor along with breathing. As a result, the amplitude of the signal waveform of body movement increases, and the chest movement due to breathing can be easily detected. The heart beat also changes depending on the state of breathing. However, if the present invention configured as described above is used, the distance between the heart and the Doppler sensor is also reduced, so the signal waveform of the beat detected by the Doppler sensor. As a result, the pulsation can be easily detected. On the other hand, when the subject turns over, the distance between the subject and the Doppler sensor is small, so the amplitude of the body motion signal waveform detected by the Doppler sensor when turning over is large, and the movement is due to turning over. Can be clearly recognized. Thus, if measurement is performed using the pillow with a built-in Doppler sensor of the present invention, it is possible to more easily detect apnea during sleep regardless of the measurement subject's sleeping posture.

It is a figure which shows one structural example of the pillow with a built-in Doppler sensor by this embodiment. It is a figure which shows the state in which a to-be-measured person is lying down using the pillow with a built-in Doppler sensor of this embodiment. It is a figure which shows the other structural example of the pillow with a built-in Doppler sensor by this embodiment. It is a figure which shows the other structural example of the pillow with a built-in Doppler sensor by this embodiment. It is a figure which shows the other structural example of the pillow with a built-in Doppler sensor by this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a pillow with a built-in Doppler sensor according to the present embodiment, where (a) shows a plan view and (b) shows a side view.

  As shown in FIG. 1, the pillow 10 with a built-in Doppler sensor according to the present embodiment is suitable for use in measuring breathing and heartbeat during sleep, and when the subject is lying down, the head of the subject is measured. A pillow to support the club. The pillow 10 with a built-in Doppler sensor according to the present embodiment includes a pillow main body 11 that is filled with the contents serving as a cushion material, and a pillow cover 12 that covers the pillow main body 11.

  Any material such as foam beads, urethane chips, soft pipes, polyester cotton, buckwheat husks, hinoki chips can be used as the cushion material filled in the pillow main body 11. However, it is preferable to use a material that maintains the shape of the pillow main body 11 relatively stably when the pillow main body 11 is filled. For example, a soft resin material such as a polyester material or a urethane material that is highly elastic is preferable.

  In addition, the pillow main body 11 is not restricted to the type of filling the contents. For example, a pillow main body 11 made of a low-resilience urethane foam or the like that has a shape that is relatively stable can be maintained. Further, the pillow main body 11 may be formed by knitting bamboo and having a hollow inside. In addition, the pillow main body 11 can be configured using a shape memory material.

  The pillow cover 12 is a cover material configured to be detachable from the pillow main body 11, and the material thereof is arbitrary. When the pillow cover 12 is attached to the pillow main body 11, the pillow cover 12 covers the entire pillow main body 11. In addition, it is not essential to provide the pillow cover 12 in the pillow 10 with a built-in Doppler sensor of this embodiment.

  The pillow 10 with a built-in Doppler sensor according to this embodiment includes a Doppler sensor 13 therein. Specifically, the inside means the inside of the pillow main body 11. More specifically, as shown in FIG. 1, the Doppler sensor 13 is located at a position shifted from the central portion in the longitudinal direction of the pillow main body 11 toward one end portion in the longitudinal direction, and in the central portion in the short direction. Further, it is built in such a position that the radio wave transmission surface faces the one end side in the short direction at a position shifted to one end side in the short side direction.

  In the example of FIG. 1, the description will be made assuming that the left-right direction is the longitudinal direction of the pillow and the front-rear direction (the upper side in the figure is the forward direction that hits the top when the person to be measured lies down) is the short direction of the pillow. . In this case, the Doppler sensor 13 hits the position of the right end in the longitudinal direction of the pillow main body 11 and the position of the rear end in the short direction, the rear end side in the short direction (the body side when the measurement subject lies down). It is built in such a posture that the transmission surface of the radio wave faces (direction).

  FIG. 2 is a diagram illustrating a state in which a person to be measured is lying down using the pillow 10 with a built-in Doppler sensor according to the present embodiment. As shown in FIG. 2, when the subject uses a pillow 10 with a built-in Doppler sensor to detect the respiratory state of the subject under sleep, the Doppler sensor 13 faces toward the subject's body. Use in such a direction. By doing so, the distance between the chest moving by breathing and the Doppler sensor 13 is reduced.

  Since the distance between the chest of the person to be measured and the Doppler sensor 13 is reduced, the amplitude of the signal waveform of the body motion detected by the Doppler sensor 13 increases with breathing, and the chest movement due to breathing is easily detected. be able to. Further, although the heart beat also changes depending on the state of breathing, if the pillow 10 with a built-in Doppler sensor according to the present embodiment is used, the distance between the heart and the Doppler sensor 13 is also reduced, so the beat detected by the Doppler sensor 13. This increases the amplitude of the signal waveform, and makes it easy to detect pulsation.

  On the other hand, when the subject turns over, the distance between the subject and the Doppler sensor 13 is small, so that the amplitude of the signal waveform of the body motion detected by the Doppler sensor 13 when turning over is large, and the movement caused by turning over I can clearly recognize that there is. As described above, if measurement is performed using the pillow 10 with a built-in Doppler sensor according to the present embodiment, it is possible to more easily detect apnea during sleep regardless of the sleep posture of the measurement subject.

  The configuration shown in FIG. 1 is merely an example of the configuration for realizing the pillow with a built-in Doppler sensor according to the present invention, and the configuration is not limited thereto. For example, as illustrated in FIG. 3, the Doppler sensor 13 may be disposed outside the pillow main body 11 and inside the pillow cover 12.

  In addition, as shown in FIG. 4, the pillow main body 11 ′ has a purpose of keeping the Doppler sensor 13 sufficiently in a posture in which the transmission surface of the radio wave faces one end side in the short direction. A support member 14 for fixing the position and posture of the Doppler sensor 13 may be provided at least in part. The support member 14 can be made of, for example, a soft resin material or bamboo material.

  In the example of FIG. 4, a support member 14 having a substantially U-shaped cross section is provided at the position on the rear end side in the short direction of the pillow main body 11 ′ across the entire area from the left end to the right end in the longitudinal direction, A Doppler sensor 13 is arranged. Here, although the cross section of the support member 14 is formed in a substantially U-shape, it is not limited to this formation. Here, the support member 14 is provided over the entire region from the left end to the right end in the longitudinal direction. However, the support member 14 may be provided only around the position where the Doppler sensor 13 is disposed.

In addition, as shown in FIG. 5, two Doppler sensors 13 may be provided. That is, in the example of FIG. 5, provided with a first Doppler sensor 13 _-1 in the same position as that shown in FIG. 1, is provided with a second Doppler sensor 13 _-2 different position from that.

The second Doppler sensor 13 _-2 is located inside the pillow, at a position shifted from the central portion in the longitudinal direction toward the other end in the longitudinal direction, and in the lateral direction from the central portion in the lateral direction. Is installed in such a position that the transmission surface of the radio wave faces to one end side in the short direction at a position shifted to one end side. In the example shown in FIG. 5, the second Doppler sensor 13 _-2 is short inside the pillow main body 11 at the left end position in the longitudinal direction of the pillow main body 11 and the rear end position in the short direction. It is built in such a posture that the radio wave transmission surface faces the rear end of the hand.

As described above, when the two Doppler sensors 13 _-1 and 13 _-2 are provided, the distance between at least one Doppler sensor and the chest and heart of the subject is determined no matter which direction the subject turns over. Since it becomes small, it can be in the state where it is always easy to detect chest movement and pulsation due to respiration. Also, when the subject turns over, the difference in amplitude between the signal waveforms detected by the two Doppler sensors 13 _-1 and 13 _-2 increases, so that the movement caused by turning over is more clearly recognized. Can do.

  Moreover, although the said embodiment demonstrated the example whose cross-sectional shape of the pillow main body 11 is a rectangle, a square may be sufficient. In this case, the direction of one side is regarded as the longitudinal direction, and the direction of the other side perpendicular thereto is regarded as the short direction, and the Doppler sensor 13 is built in as in the above embodiment.

  In addition, each of the above-described embodiments is merely an example of actualization in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

10 Pillow with built-in Doppler sensor 11 Pillow body 12 Pillow cover 13 Doppler sensor 14 Support member

Claims (5)

  A position inside the pillow for supporting the measurement subject's head when the measurement subject lies down, shifted from the central portion in the longitudinal direction toward one end in the longitudinal direction, and short The Doppler sensor is built in such a position that the radio wave transmission surface faces the one end side in the short direction at a position shifted from the central part of the direction toward one end side in the short direction. A pillow with a built-in Doppler sensor. The above circle is composed of a pillow main body and a pillow cover covering the pillow main body,
The pillow according to claim 1, wherein the Doppler sensor is disposed inside the pillow main body. The above circle is composed of a pillow main body and a pillow cover covering the pillow main body,
The pillow with a built-in Doppler sensor according to claim 1, wherein the Doppler sensor is disposed outside the pillow main body and inside the pillow cover.   The pillow according to claim 2 or 3, wherein the pillow main body includes at least a support member for fixing the position and posture of the Doppler sensor.   Inside the pillow, at a position shifted from the central portion in the longitudinal direction toward the other end in the longitudinal direction, and shifted from the central portion in the lateral direction toward one end in the lateral direction. 5. The second Doppler sensor is further incorporated at a position where the radio wave transmitting surface faces toward one end in the short direction. Pillow with built-in Doppler sensor described in 1.