JP7222509B2 - Sleep state measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for measuring the sleep state of a subject mainly at home or the like.

2. Description of the Related Art Conventionally, there has been known a device that measures a user's sleep state.

For example, in Patent Document 1, based on the measurement results of the oxygen saturation finger sensor, the resistance change of the chest belt, the microphone attached to the throat, and the flow sensor attached under the nose, apnea per unit time A biological information measuring device for calculating the number of times and the like is shown.

Further, Patent Literature 2 discloses an apnea detection device having a respiratory pace analysis section and an apnea segment extraction section. The breathing pace analysis unit determines the breathing pace of the user based on the ambient sounds emitted from the surroundings and the posture information of the user. Based on the breathing pace and the silent intervals in the ambient sound, the apnea interval extracting unit determines whether or not the silent intervals are included in the intervals in which the user is estimated to be breathing.

JP-A-2000-312669 WO2010/044162

However, in the technique of Patent Document 1, when the sensors are attached under the nose, on the fingers, and on the chest, it is necessary to connect various sensors with cables. may become.

Further, in Patent Document 2, it is determined whether there is sound or silence based on recorded data of ambient sounds, and if there is no sound, an apnea diagnosis is performed. It can be difficult. Another problem is that it cannot be used in a noisy environment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sleep state measuring device that improves the accuracy of grasping the state of a user during sleep.

A sleep state measuring device according to an aspect of the present invention includes a neckband that can be worn along the circumferential direction of a user's neck, and a connection structure that is connected to one open end of the neckband. a sensor unit configured to extend along the user's neck in a worn state, the sensor unit including a respiratory sound acquisition unit that acquires the user's throat sound and a breath sound acquisition unit that is directed toward the user's neck. and an optical sensor having a light emitting part that emits light and a light receiving part that receives light reflected from the inside of the neck, and an acceleration sensor for measuring the body movement of the user. It further comprises a storage unit for accumulating at least one of acquired data information, acquired data information from the optical sensor, and acquired data information from the acceleration sensor for a predetermined period of time. The back surface of the sensor unit is configured to be sandwiched from the outer side of the direction, and the back surface of the sensor unit is a first back surface located in the middle part in the circumferential direction and a front surface in the circumferential direction located on the neck side of the user from the first back surface. The optical sensor is provided on the first back surface, and the respiratory sound acquisition unit is provided on the second back surface.

According to this aspect, the breath sound data acquired from the breath sound acquisition unit provided in the sensor unit connected to the neckband via the connection structure and the vibration amplitude measured by the acceleration sensor are used in combination. Since the user's state (for example, breathing state and sleep state) can be determined, it is possible to improve the accuracy of grasping the state of the user during sleep as compared with the conventional technology. Furthermore, it is possible to improve the accuracy of segmentation of the transition time during sleep as compared with the conventional technology.

Furthermore, since the body movement and body position during sleep can be measured with an accelerometer, it is possible to record the body position when a specific respiratory state (for example, hypopnea or apnea) is determined. That is, it becomes possible to verify in what sleep phase a specific respiratory state (for example, hypopnea/apnea) occurs. Furthermore, since the acceleration sensor and the respiratory sound acquisition unit are provided in a common sensor unit, there is a high correlation between the body position/body movement and the respiratory state.

In the sleep state measuring device, the neckband and the sensor unit may be detachable.

By making the sensor unit detachable in this manner, a common sensor unit can be applied to neckbands of different sizes. This allows, for example, a plurality of users with different neck sizes to use a common sensor unit. Also, for example, the neckband can be replaced according to changes in the body shape of the user.

In the sleep state measuring device, at least the breathing state, sleep mode, and depth of sleep of the user during sleep based on the sound data acquired by the respiratory sound acquisition unit and the light data acquired by the optical sensor unit A judgment unit may be provided for judging any one of them, and when the acceleration sensor detects a body movement of a predetermined amount or more, the measurement result of the sound data during that period may be masked.

According to the present invention, by providing the breath sound acquisition section, the optical sensor, and the acceleration sensor in the sensor unit connected to the neckband, it is possible to improve the accuracy of grasping the state of the user during sleep.

Schematic diagram showing the wearing state of the sleep state measuring device Perspective view of the sleep state measuring device as seen from diagonally below The perspective view which shows the rotation state of the sleep state measuring apparatus The perspective view which shows the state which removed the sensor unit from the sleep state measuring device. Bottom view of sleep measuring device Front view of sleep state measuring device Side view of sleep state measuring device VI-VI line sectional view of Fig. 5 VII-VII line sectional view of FIG. Enlarged view of region VIII in FIG. Enlarged view of region IX in FIG. Block diagram showing a schematic configuration of a sleep state measuring device Block diagram showing a schematic configuration of the control unit A diagram showing an example of a display screen of a terminal device

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its applicability or its uses.

<Structure of sleep state measuring device>
FIG. 1 is an external view showing a state in which a sleep state measuring device A is worn on a subject. The sleep state measuring device A is of a neckband type, and is configured to measure the sleep state of the user by being attached to the user's neck during sleep.

As shown in FIG. 1, it comprises a neckband 11 that can be worn along the circumference of the user's neck, and a sensor unit 2 attached to the neckband 11 .

The neckband 11 is arranged so that each sensor 21, 22, 23, 24 of the sensor section 20, which will be described later, can receive measurement signals from the neck. That is, the neckband 11 is configured to be wearable along the circumferential direction of the user's neck. In addition, the specific configuration is not particularly limited.

For example, as shown in FIG. 2A, the neckband 11 is formed in a substantially C shape using an elastic material. The neckband 11 is worn from the back side of the neck toward the neck after the opening is widened on both sides by the user so as to sandwich the neck of the user from the outside in the circumferential direction. (See Figure 1). The shape of the neckband 11 is not limited to the substantially C-shape, as long as the sensor portion of the sensor unit 2 can be in close contact with the user's skin.

The sensor unit 2 is provided at one open end of the neckband 11 . The sensor unit 2 includes a housing 50 having a display section 42 on the front and a push-button type operation section 45 on the side surface (for example, the bottom surface) in the vertical direction. This makes it easy to operate even when the user wears it. Note that the operation unit 45 may be provided on another side surface of the housing 50 .

Further, as shown in FIG. 2A, the other open end of the neckband 11 is provided with a non-slipper 14 so that the sleeping state measuring device A does not slip in the circumferential direction of the user's neck after being worn. there is In this embodiment, the up-down direction and the left-right direction are defined based on the user's wearing state. In addition, the front (chest) side of the user is defined as front, and the back side is defined as rear.

As shown in FIGS. 2B and 2C, the sensor unit 2 can be rotated with respect to the neckband 11 toward the human body (inner side), and can be attached to and removed from the neckband 11. may be configured to Specifically, the sensor unit 2 integrally protrudes outward from an end (hereinafter referred to as a base end) on the side of the neckband 11 in the longitudinal direction of the housing 50 (hereinafter referred to as “the longitudinal direction of the housing”). A support portion 51 is provided. The support portion 51 is formed integrally with a plate-like support main body portion 51a (see FIG. 6) protruding outward from the base end portion of the housing 50 and at the tip of the support main body portion 51a. and a hook-shaped engaging protrusion 51b (see FIG. 6) in a cross-sectional view formed to have a diameter slightly larger than the thickness of the plate.

A fitted portion 12 supported rotatably with respect to the neckband 11 is provided at the end portion of the neckband 11 on the side of the housing 50 .

The fitted portion 12 is pivotally supported by a support shaft 13 (see FIG. 6) extending in the width direction of the neckband 11 . Furthermore, the fitted portion 12 is formed in a substantially U-shape with a bottom in a cross-sectional view, so that the support portion 51 can be fitted therein. Specifically, the fitted portion 12 has a fitting opening with an opening width slightly smaller than the diameter of the engaging protrusion 51 b of the support portion 51 . The fitted portion 12 is continuously formed with a retainer portion 12a having a pair of plate-shaped side walls arranged opposite to each other across the width of the opening of the fitting port, and an end portion on the bottom side of the retainer portion 12a, A housing portion 12b having a substantially circular housing space in a cross-sectional view formed to be slightly larger in diameter than the engaging projection 51b is provided.

When the support portion 51 of the housing 50 is fitted into the fitted portion 12, the side wall of the retaining portion 12a bends and the width of the retaining portion 12a widens, thereby permitting the insertion operation of the engaging protrusion 51b. , and the engaging projection 51b can be fitted into the accommodating portion 12b. On the other hand, after the engaging projection 51b is fitted into the housing portion 12b, the retaining portion 12a prevents the engaging projection 51b from coming out in the direction opposite to the fitting direction unless the side wall thereof is bent. .

Furthermore, a spring 15 (see FIG. 6) may be provided in the neckband 11 to urge the fitted portion 12 from the rotating state toward the normal use state.

In this embodiment, as shown in FIG. 1, the state in which the sleep state measuring device A can be attached to the human body is called a normal use state, and the sensor unit 2 is in a neck state as shown in FIG. 2B. A state in which the belt 11 is rotated with respect to the band 11 is called a rotated state.

The rotation structure and attachment/detachment structure of the sensor unit 2 are not limited to the structures shown in FIGS. 2A to 2C, and other structures having similar functions may be realized.

Further, the sensor unit 2 is provided with a communication connector 65 that opens rearward on the side end face of the base end side of the housing 50 . The communication connector 65 is configured so that a communication cable such as a USB (Universal Serial Bus) cable can be connected, and is used for communication with an external device (for example, a personal computer) or for charging the battery 61 from the outside. can be used for Since the conventional technology can be applied to the specific configuration of the communication connector 65, detailed description thereof will be omitted here.

By providing the communication connector 65 at such a position, the communication connector 65 is exposed to the outside when the sensor unit 2 is rotated, but is not exposed to the outside during normal use. As a result, the design of the sleep state measuring device A can be improved, and dust and the like can be prevented from entering the communication connector 65 .

As shown in FIGS. 4 and 6, the housing 50 is arranged to extend along the longitudinal direction of the housing. A substrate 60 arranged in such a manner is accommodated.

On the surface of the substrate 60, an acceleration sensor 23 is provided in the center, and a respiration sensor 24 as a sound sensor is provided on the tip side. Optical sensors 21 and 22 are provided at the center of the back surface of the substrate 60 . That is, the respiratory sensor 24, the optical sensors 21 and 22, and the acceleration sensor 23 are arranged close to each other. In this embodiment, regarding the direction of the substrate 60, the direction along the longitudinal direction of the housing is called the longitudinal direction, and the direction orthogonal to the longitudinal direction is called the width direction. Further, the surface of the substrate 60 on the user's neck side is defined as the back surface, and the surface on the opposite side is defined as the front surface. In addition, the end on the neckband 11 side in the longitudinal direction of the substrate 60 is referred to as a proximal end, and the end on the open end side is referred to as a distal end.

The respiratory sensor 24 acquires the user's throat sound. Although the specific configuration is not particularly limited, for example, conventionally known microphones such as MEMS microphones can be applied. In this embodiment, since the respiratory sensor 24 is provided on the substrate 60, as shown in FIG. In addition, a sound guide path 59 surrounded by a wall portion 58 is provided to guide sound from the sound hole 57 to the respiratory sensor 24 . The wall portion 58 includes a wall portion 58a integrally formed with the outer wall of the housing 50 and formed so that the sound guide path 59 extends from the sound hole 57 toward the inside of the housing 50, the wall portion 58a and the substrate 60. and a rubber cushioning material 58b sandwiched between them to absorb vibrations. By providing the sound guide path 59 in this manner, it is possible to prevent reverberation noise within the housing 50 . Here, it is preferable that the respiratory sensor 24 is provided on the front end side of the substrate 60, that is, on the front end side of the sensor unit 2, and on the open end side of the sleep state measuring device A. FIG. This makes it possible to acquire the pharyngeal sound at a position closer to the airway of the user. Therefore, it is preferable to provide the sound hole 57 on the front end side of the housing 50, and from the viewpoint of facilitating the routing of the sound guide path 59, it is also preferable to provide the respiration sensor 24 on the front end side of the substrate.

The optical sensors 21 and 22 have a light-emitting portion (not shown) that emits light toward the user's neck and a light-receiving portion (not shown) that receives reflected light from inside the neck.

FIG. 8 shows a configuration example around the optical sensors 21 and 22 . As shown in FIG. 8, a resin-made transparent plate 53 is arranged in the light irradiation direction (human body side) of the optical sensors 21 and 22 . Further, the optical sensors 21 and 22 are surrounded by a resin member 52 having high light shielding properties in order to obliquely transmit light from the outside. Furthermore, in order to improve the alignment accuracy between the position of the housing 50 and the fixed position of the substrate 60, a positioning boss 55 for positioning as shown in FIG. 9 is provided between the substrate and the housing.

In this embodiment, as the optical sensors 21 and 22, an infrared optical sensor 21 and an optical sensor 22 using a red light source are used. When the optical sensors 21 and 22 are to be distinguished from each other, an infrared sensor is sometimes called an infrared sensor 21 and a sensor using a red light source is sometimes called a red light sensor 22 . However, in this embodiment, the optical sensors 21 and 22 are described separately for convenience of explanation of functions and operations, but the functions of the two optical sensors 21 and 22 may be realized by a single module. .

The acceleration sensor 23 is a sensor for measuring body movement and/or posture of the user. Although the acceleration sensor is arranged at the center of the substrate surface in FIGS. 4 and 6, the present invention is not limited to this. Specifically, the acceleration sensor 23 may be arranged close to other sensors, and may be arranged anywhere on the front and rear surfaces of the substrate. In addition, the configuration of the acceleration sensor 23 can use a conventionally known one, and the method of measuring body movement and/or body posture based on the acceleration sensor 23 can also use conventional technology. A detailed description thereof will be omitted.

Further, the board 60 is provided with the above-described communication connector (charging connector) 65 at the base end in the longitudinal direction, and has an external device (for example, a terminal device 80 such as a mobile phone) on the surface of the distal end in the longitudinal direction. A communication module 62 configured to enable wireless communication is provided. Also, a battery 61 is provided at a location near the proximal end in the center of the surface of the substrate 60 so as to be sandwiched between the inner wall surface of the housing 50 and the substrate 60 .

Although not specifically illustrated, an antenna is built in the distal end side of the communication module 62 so that the battery 61 and the antenna do not overlap in plan view (see FIG. 4). This can prevent the battery 61 from affecting the communication quality of the antenna of the communication module 62 . The communication module 62 is, for example, a module compatible with BLE (Bluetooth Low Energy) configured to enable communication by Bluetooth (registered trademark), and is capable of two-way communication with an external device. However, the communication method of the communication module 62 is not limited to BLE, and may be another method. Also, the type of the external device to be communicated with is not particularly limited. For example, as shown in FIG. 1, it may be a terminal device 80, or it may be configured to communicate and operate in cooperation with other measuring devices and control devices built in pillows, lighting equipment, etc. good. Also, a server device (not shown) or the like connected via a network may be a communication target.

The surface of the substrate 60 is further provided with a control section 3 that controls the operation of the entire sensor unit 2 and a storage section 44 that stores data determined by the control section 3 .

The control unit 3 can be realized by, for example, a microcomputer, and executes various calculations and controls. The control unit 3 calculates the blood oxygen concentration, pulse, body movement and/or breathing sound based on the measurement data of the sensors 21, 22, 23, and 24, and based on the results of these calculations, calculates the respiratory state. , sleep mode and/or depth of sleep.

<Block configuration and operation of sleep state measuring device>
FIG. 10 is a block diagram showing the configuration of the sleep state measuring device A, and FIG. 11 is a block diagram showing the configuration of the controller 3. As shown in FIG. The structural features of the sleep state measuring device A have been described in the above "Structure of the sleep state measuring device", and here, the features of the electrical configuration (block configuration) will be mainly described. and

As shown in FIG. 10 , the data obtained by the sensors 21 , 22 , 23 and 24 of the sensor section 20 are sent to the control section 3 . Specifically, the optical sensor 21 outputs measurement data (including period information) received by a light receiving section (not shown) to the control section 3 as infrared processed data DR1. Similarly, the optical sensor 22 outputs measurement data (including period information) received by a light receiving section (not shown) to the control section 3 as red processing data DR2. The acceleration sensor 23 outputs acceleration measurement data as acceleration data DG. The respiratory sensor 24 outputs measurement data of throat sounds to the control unit as respiratory sound data DA.

As shown in FIG. 11 , the control unit 3 includes a calculation unit 31 , a determination unit 33 and a signal generation unit 39 .

The computing unit 31 computes the blood oxygen concentration, pulse, body movement and/or breathing sound based on the measurement data of the sensors 21 , 22 , 23 and 24 . There are various calculation methods, the specific method can be arbitrarily selected, and the parameters and the like used for the calculation can be arbitrarily set. In the following description, an example of the calculation method will be described in order to facilitate understanding of the invention, but it is not intended to limit the calculation method of the present invention. The same applies to the determination method by the determination unit 33, which will be described later.

The calculation unit 31 calculates the blood oxygen concentration based on the infrared processed data DR1 and the red processed data DR2. For example, FFT processing is performed on the infrared processed data DR1 and the red processed data DR2 to extract the frequency components, and based on the result of the comparison operation between the frequency components of the infrared processed data DR1 and the frequency components of the red processed data DR2. to determine the blood oxygen level. Note that the calculation interval of the blood oxygen concentration can be set arbitrarily. That is, the calculation unit 31 may constantly calculate the blood oxygen concentration, or may calculate it at predetermined time intervals. Further, when calculating the blood oxygen concentration at predetermined time intervals, the optical sensors 21 and 22 may be operated at predetermined time intervals. That is, the operation intervals of the optical sensors 21 and 22 may be set/changed arbitrarily. By narrowing the calculation interval (sensor operation interval), measurement accuracy can be improved, and by widening the calculation interval (sensor operation interval), power consumption can be reduced. The same applies to other sensors described below.

The calculator 31 calculates the pulse rate based on the red processed data DR2. Specifically, the cycle of the arterial flow is calculated based on the red processed data DR2, and the pulse rate is calculated based on the cycle.

The calculator 31 calculates body motion and body posture based on the acceleration data DG. Specifically, since it is possible to acquire information on the degree of inclination, movement speed, and size of the sleep state measuring device A from the acceleration data DG, body movement and body position (hereinafter simply referred to as body movement) can be obtained based on this information. may be described).

The calculation unit 31 obtains data that serves as a basis for grasping the respiratory state based on the respiratory sound data DA. For example, the calculation unit 31 extracts frequency components of breath sounds (hereinafter simply referred to as breath sounds) based on the breath sound data DA.

The determination unit 33 determines the respiratory state and sleep state of the user based on the calculation results of the blood oxygen concentration, pulse rate, body movement, and breath sounds calculated by the calculation unit 31 .

The first determination unit 35 determines whether the person is in a hypopnea state or an apnea state based on the breath sounds.

The determination of hypopnea is made, for example, when the amplitude value of the user's throat sound is less than or equal to a predetermined percentage of a predetermined reference value (for example, normal amplitude) and continues for a predetermined period of time. state. The apnea state can also be determined based on the same principle.

Data used as the predetermined reference value is not particularly limited. For example, measurement may be performed for each user, or data arbitrarily set by a manufacturer or the like may be used.

A method for detecting that "a state of a predetermined percentage or less has continued for a predetermined period" is not particularly limited. For example, there are a method of measuring the peak interval of the amplitude value of the throat sound, a method of obtaining and utilizing a moving average of the throat sound, and a method of binarizing and determining whether or not a predetermined reference value is exceeded.

The first determination unit 35 may determine whether or not the person is in a hypopnea state or an apnea state using blood oxygen concentration in addition to breath sounds. For example, in addition to the determination based on the breath sounds, a criterion of whether or not the blood oxygen concentration has decreased by a predetermined value or more from a predetermined reference value may be added. As a result, it is possible to improve the accuracy of determination of hypopnea or apnea.

Further, body motion information may be added to the determination of hypopnea or apnea. Specifically, when there is body movement, there is a tendency for noise to be added to the measurement results of the respiration sensor 24 . Therefore, if there is body movement of a predetermined amount or more, the measurement results during that period may be masked. This makes it possible to further improve the determination accuracy.

Then, when hypopnea or apnea occurs, the first determination unit 35 or the signal generation unit 39 (to be described later) associates the respiratory state with body movement or body position. This makes it possible to visualize in what position the hypopnea state or apnea state has occurred, making it easier for the user to take countermeasures such as devising a sleep orientation. At this time, the respiratory state is determined based on the throat sound obtained at the user's neck, and the body movement is observed by the acceleration sensor 23 provided in the vicinity, so the body direction (neck direction) It is characterized by being able to increase the degree of correlation between the breathing condition and the breathing condition.

In the technique of the present disclosure, the respiratory sensor 24, the optical sensors 21 and 22, and the acceleration sensor 23 are arranged close to each other. , less susceptible to external noise. Therefore, more accurate measurement results and judgment results can be obtained. Furthermore, data can be linked with the time lag minimized. In addition, in the technology of the present disclosure, since only the sleep state measuring device A attached to the neck of the user is used, unlike Patent Document 1, there is no need to attach sensors to multiple locations on the body, and the user can It is characterized by less burden on

The second determination unit 36 determines the depth of sleep based on the pulse rate, body movement and breathing sounds. For example, the second determination unit 36 determines that the sleep is deep when the breathing sound indicates a normal breathing state, the pulse rate is stable, and the amount of body movement is equal to or less than a predetermined reference value. Here, the normal breathing state refers to a state in which the breath sound does not correspond to hypopnea, apnea, or snoring, which will be described later. In addition, it can be determined that the pulse rate is stable, for example, by determining that the amount of fluctuation during a predetermined period is equal to or less than a predetermined value.

In the technology of the present disclosure, as described above, the respiratory sensor 24, the optical sensors 21 and 22, and the acceleration sensor 23 are arranged close to each other. For example, it is less susceptible to external noise than when the microphone is placed away from the body. Therefore, it is possible to determine the sleeping state with higher accuracy.

The third determination unit 37 determines whether the normal breathing mode or the sleep mode is entered based on the pulse rate and the body motion. For example, when the pulse rate is stable for a certain period of time, the third determination unit 37 determines that during that period, the amplitude of the measurement result (body movement) of the acceleration sensor is less than or equal to a predetermined value, and is stable, it is determined that the sleep mode has been entered. Whether or not the breath sounds are stable can be determined, for example, based on the peak positions of the breath sounds and the intervals between the peak positions, depending on whether or not predetermined conditions are satisfied.

The fourth determination unit 38 determines whether or not the person is snoring (referred to as a snoring state) based on the breath sounds. Whether or not the user is snoring is determined by whether or not the breathing sound exceeds a predetermined standard. Snoring can be easily determined because its volume is several times higher than that of other respiratory states.

The signal generation section 39 has a function of receiving the determination results of the first determination section 35 to the fourth determination section 38 and generating a signal. Specifically, each data is linked and a processed signal is generated. It also converts the data into data that can be output via the signal output unit 41 (corresponding to the communication connector 65) and the data transmission unit 43 (corresponding to the communication module 62) in the subsequent stage, and generates data to be displayed on the display unit 42. A signal generated by the signal generation unit 39 is transmitted to an external device (for example, the terminal device 80 ) via the signal output unit 41 and the data transmission unit 43 or displayed on the display unit 42 . Also, the control unit 3 may store the data generated by the signal generation unit 39 in the storage unit 44 .

FIG. 12 shows a display example on the display screen 81 of the terminal device 80. As shown in FIG. The technology of the present disclosure is characterized in that a plurality of determination results can be associated and displayed. For example, as shown in FIG. 12, the breathing state (in FIG. 12, the size of snoring) can be displayed, and the direction in which the body is facing can be displayed at the time of the breathing state. Thereby, the convenience of the user can be enhanced. For example, as described above, it becomes easier for the user to take countermeasures such as changing the sleeping direction.

Note that the control unit 3 of the sleep state measuring device A controls the calculation results of the calculation unit 31 (blood oxygen concentration, pulse rate, body movement and posture, breathing sounds, etc.) and the determination results of the determination unit 33 (respiratory state, sleep depth of sleep, sleep mode, presence/absence of snoring, etc.) may be stored in the storage unit 44 . As a result, the controller 3 of the sleep state measuring device A or an external device such as a terminal device can perform quantitative evaluation based on these accumulated data. By doing so, it is possible to show the user measures for improving sleep, etc., before a specific symptom appears, for example, before an apnea symptom appears.

INDUSTRIAL APPLICABILITY The present invention is useful mainly as a device for measuring the sleep state of a subject at home or the like.

A sleep state measuring device 2 sensor unit 3 control unit 11 neckband 20 sensor units 21 and 22 optical sensor 23 acceleration sensor 24 respiration sensor (sound sensor)
33 decision unit

Claims (7)

a neckband configured to be worn along the circumferential direction of the user's neck;
a sensor unit connected to one open end of the neckband via a connecting structure and configured to extend along the neck of the user in a worn state;
The sensor unit is an optical sensor having a respiratory sound acquisition section that acquires a user's throat sound, a light-emitting section that emits light toward the neck of the user, and a light-receiving section that receives light reflected from the neck. and an acceleration sensor for measuring body movement of the user,
further comprising a storage unit for accumulating at least one of data information obtained from the breath sound obtaining unit, data information obtained from the optical sensor, and data information obtained from the acceleration sensor for a predetermined period of time;
It is configured to sandwich the user's neck from the outside in the circumferential direction when worn,
The back surface of the sensor unit includes a first back surface located in a circumferentially intermediate portion and a second back surface located in a circumferential tip portion and formed to be inclined toward the user's neck from the first back surface. and
The optical sensor is provided on the first back surface, and the breath sound acquisition unit is provided on the second back surface.
Sleep state measuring device. The breath sound acquisition unit
a sound sensor provided in the sensor unit;
a contact portion protruding from the rear surface of the sensor unit toward the user side at the tip of the sensor unit and having a sound hole for acquiring the breathing sound of the user's neck;
2. The sleep state measuring device according to claim 1, further comprising a sound guide path for guiding sound from said sound hole to said sound sensor. 3. The sleep state measuring device according to claim 1, wherein the neckband and the sensor unit are detachable. Based on the sound data acquired by the respiratory sound acquiring unit and the light data acquired by the optical sensor, at least one of the user's breathing state during sleep, sleep mode, and depth of sleep is determined. having a determination unit,
2. The sleep state measuring apparatus according to claim 1, wherein when the acceleration sensor detects a body motion of a predetermined amount or more, the measurement result of the sound data during that period is masked. The storage unit stores the information on the breathing state of the user during sleep determined by the determination unit and the information on the body movement or posture of the user obtained by the acceleration sensor in association with each other,
5. The control unit according to claim 4, further comprising a control unit that evaluates at least one of the user's respiratory state during sleep, sleep mode, and depth of sleep for a predetermined period based on the information accumulated in the storage unit. Sleep state measuring device. 5. The sleep state measuring apparatus according to claim 4, wherein the determination unit determines the respiratory state when a variation width of the measured value of the acceleration sensor is within a predetermined range for a predetermined time or longer. 7. The sleep state measuring device according to any one of claims 1 to 6, comprising a communication module for communicating with an external device.

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