JP2018019879A - Falling-asleep determination device, falling-asleep determination method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of suppressing erroneous determination of falling asleep caused by an individual difference.SOLUTION: A falling-asleep determination device comprises: a reception part for receiving biological information indicating pulsation which induces a blood flow in a user; and a determination part which determines whether the user has fallen asleep, on the basis of the relation between the number of pulsations per a unit time of pulsation indicated by the biological information and a determination value corresponding to the number of times per a unit time of pulsation during a period in which the user lies in the bed in the past.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for determining sleep onset.

  Patent Document 1 describes a sleep onset determination system that determines sleep on the basis of a user's heart rate. The sleep onset determination system described in Patent Literature 1 determines sleep onset when the heart rate measured in real time with respect to the average value of the user's 8 beats is lower.

JP 2010-273752 A

  It is known that there are individual differences in the relationship between pulsation (heartbeat or pulse) that causes blood flow in a user and sleep. For this reason, when the sleep characteristic of an individual is not taken into consideration as in the sleep detection system described in Patent Document 1, erroneous determination due to individual differences in the relationship between pulsation and sleep is likely to occur.

  This invention is made | formed in view of the situation mentioned above, and makes it a solution subject to provide the technique which can suppress the misjudgment resulting from an individual difference about the judgment of falling asleep.

  One aspect of the sleep determination apparatus of the present invention is a receiving unit that receives biological information representing a pulsation that causes blood flow in a user, the number of pulsations per unit time represented by the biological information, and the user A determination unit that determines whether or not the user has fallen asleep based on a relationship with a determination value according to the number of times per unit time of the pulsation while the user has been in bed in the past .

  In one aspect of the sleep onset determination apparatus described above, the number of times is preferably a value obtained by multiplying the minimum value by a coefficient.

  In one aspect of the sleep onset determination apparatus described above, it is preferable that the determination unit further determines the coefficient according to the attribute of the user and generates the determination value by multiplying the coefficient by the coefficient.

  In one aspect of the sleep onset determination apparatus described above, it is preferable that the determination unit starts determining whether or not the user has fallen asleep when receiving the bedtime information indicating that the user has gone to bed.

  In one aspect of the sleep onset determination apparatus described above, it is preferable that the determination unit determines that the user has fallen asleep when a state in which the number of beats is lower than the determination value continues for a predetermined time.

  In one aspect of the sleep onset determination apparatus described above, the determination unit repeatedly performs a comparison between the number of beats and the determination value, and the number of beats every time the comparison unit performs the comparison. Is counted up when the value is lower than the determination value, and a counter that clears the count value when the number of beats is equal to or greater than the determination value; and when the count value of the counter exceeds a threshold value, the user It is preferable that the determination unit further changes the threshold based on the attribute of the user.

  In one aspect of the sleep determination apparatus described above, it is preferable that the comparison unit stops the comparison when the sleep determination unit determines that the user has fallen asleep.

  One aspect of the sleep determination method of the present invention is to receive biological information representing a pulsation that causes blood flow in a user, the number of pulsations per unit time represented by the biological information, and the user in the past It is determined whether or not the user has fallen asleep based on a relationship with a determination value corresponding to the number of beats per unit time during bedtime.

  One aspect of the program of the present invention is a receiving procedure for receiving biological information representing a pulsation that causes blood flow in a user, a number of pulsations per unit time represented by the biological information, and the utilization A determination procedure for determining whether or not the user has fallen asleep, based on a relationship with a determination value according to the number of times per unit time of the pulsation while the person has been in bed in the past, Let it run.

1 is a diagram showing a sleep onset determination system 1 including a sleep onset determination device 100. FIG. FIG. It is the figure which showed an example of the heart rate of bedtime. FIG. 4 is an enlarged view of a section indicated by a double arrow A shown in FIG. 3 (a section before and after falling asleep). 5 is a flowchart for explaining a sleep onset determination operation of the sleep onset determination apparatus 100. It is the figure which showed the example of a sleep determination. It is a figure which shows the sleep determination system 1A containing the sleep determination apparatus 100A. It is the figure which showed an example of the coefficient 103b and the threshold value 103c set according to age. 2 is a diagram illustrating an example of a sensor 200.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the size and scale of each part are appropriately different from the actual ones. The embodiments described below are preferred specific examples of the present invention. For this reason, the technically preferable various restrictions are attached | subjected to this embodiment. However, the scope of the present invention is not limited to these forms unless otherwise specified in the following description.

<First Embodiment>
FIG. 1 is a diagram showing an overall configuration of a sleep onset determination system 1 including a sleep onset determination apparatus 100 according to the first embodiment of the present invention. The sleep onset determination system 1 includes a sleep onset determination device 100 and a sensor 200. The sleep onset determination system 1 determines the sleep onset of the user E who is taking a supine posture on the bed 5.

The sensor 200 is, for example, a sheet-like piezoelectric element. The sensor 200 is disposed below the mattress of the bed 5 or the like.
When the user E goes to bed, the sensor 200 outputs a detection signal of a predetermined level or higher. For this reason, when the sensor 200 outputs a detection signal of a predetermined level or higher, it is possible to detect the user E's bed.
In addition, when the user E goes to bed, biometric information including the component of the heartbeat of the user E is detected as a change in pressure on the sensor 200. The heartbeat is an example of a pulsation that causes blood flow in the user E. The sensor 200 outputs a detection signal on which biological information is superimposed.
Although FIG. 1 shows a configuration in which the detection signal is transmitted to the sleep detection apparatus 100 by wire for convenience, a configuration in which the detection signal is transmitted wirelessly may be used.

  The sleep onset determination apparatus 100 determines the sleep onset of the user E using the detection signal output from the sensor 200. The sleep onset determination apparatus 100 is, for example, a portable terminal, a personal computer, or a dedicated sleep determination apparatus.

  FIG. 2 is a diagram mainly showing the sleep onset determination apparatus 100 in the sleep onset determination system 1. The sleep onset determination apparatus 100 includes a clock unit 101, a display unit 102, a storage unit 103, and a processing unit 104.

  The clock unit 101 is, for example, an RTC (Real Time Clock). The clock unit 101 measures time. The display unit 102 displays various information. For example, the display unit 102 displays the determination result of the user E falling asleep.

  The storage unit 103 is an example of a computer-readable recording medium. Furthermore, the storage unit 103 is a non-transitory recording medium. The storage unit 103 is, for example, a known arbitrary type recording medium such as a semiconductor recording medium, a magnetic recording medium, or an optical recording medium, or a recording medium in which these recording media are combined. In this specification, “non-transient” recording media are all computer-readable except for recording media such as transmission lines that temporarily store transitory propagating signals. However, this does not exclude volatile recording media.

  The storage unit 103 stores a program 103a that defines the operation of the sleep onset determination apparatus 100, and various information (coefficient 103b, threshold 103c, and minimum beat rate 103d) used for sleep onset determination. The program 103a may be provided in the form of distribution via a communication network (not shown) and then installed in the storage unit 103. The coefficient 103b, the threshold value 103c, and the minimum beat number 103d will be described later.

  The processing unit 104 is a processing device (computer) such as a CPU (Central Processing Unit). The processing unit 104 reads and executes the program 103a stored in the storage unit 103, whereby the first receiving unit 104a, the bed detection unit 104b, the pulsation number measurement unit 104c, and the minimum pulsation number detection unit 104d. And the determination unit 104e.

  The first receiving unit 104a receives a detection signal on which biological information is superimposed from the sensor 200. The first receiving unit 104a supplies the detection signal to the bed detection unit 104b and the pulsation rate measuring unit 104c.

  When the bed detection unit 104b receives a detection signal of a predetermined level or higher from the sensor 200, the bed detection unit 104b detects the bed of the user E. While detecting the bed of the user E, the bed detection unit 104b continues to supply bed number information indicating that the user E is going to bed to the pulsation number measurement unit 104c and the determination unit 104e. .

  The heart rate per unit time (for example, 1 minute) of the user E is based on the biological information (heart rate component) superimposed on the detection signal while receiving the bedtime information. (Hereinafter referred to as “number of beats”). That is, the pulsation number measuring unit 104c measures the pulsation number while the user E is in bed.

  When the user E is in bed, the beat number measuring unit 104c measures the number of beats at a specific time interval (for example, every 4 seconds) based on the time between the latest heartbeat and the immediately preceding heartbeat. To do. The pulsation number measurement unit 104c is an example of a measurement unit that repeatedly measures the pulsation number based on biological information. The specific time interval is not limited to 4 seconds and can be changed as appropriate. The specific time interval may be, for example, an interval of 10 seconds. Each time the number of beats is measured, the beat number measuring unit 104c supplies the number of beats to the minimum beat number detecting unit 104d and the determining unit 104e.

  The minimum beat number detecting unit 104d detects the minimum beat number 103d. The minimum pulsation rate 103d is the minimum value of the pulsation rate of the user E during the period in which bedtime information is continuously supplied. A base heart rate representing a heart rate in a deep sleep state may be used instead of the minimum beat rate 103d. In this case, the minimum beat number detection unit 104d detects the base heart rate instead of the minimum beat number 103d. This base heart rate can be obtained from the heart rate of the user E by a known method. The minimum pulsation rate 103d is a value based on the sleep characteristics of the user E. The minimum beat number detection unit 104 d stores the minimum beat number 103 d in the storage unit 103. When the minimum beat number 103d is already stored in the storage unit 103, the minimum beat number detection unit 104d changes the already stored minimum beat number 103d to the newly detected minimum beat number 103d. Update. The newly stored minimum pulsation rate 103d is used for subsequent sleep detection.

Here, an example of the minimum number of beats 103d will be described.
FIG. 3 is a diagram showing an example of the heart rate during the bedtime. In FIG. 3, a section indicated by a double arrow A is a section before and after falling asleep. FIG. 4 is an enlarged view of a section indicated by a double arrow A shown in FIG. 3 (a section before and after falling asleep).
As shown in FIG. 4, the heart rate (the number of pulsations) fluctuates even in a resting state (bedroom state) in which the user E is lying down. And this variation has individual differences. For this reason, there is a high possibility that the minimum heart rate (minimum pulsation rate) during the bedtime period varies from user to user. Therefore, when a value corresponding to the minimum number of beats of a fixed value that is not related to the sleep characteristic of the user E is used as a determination value for sleep determination, the minimum number of beats of the fixed value and the user E's A misjudgment due to a difference from the actual minimum beat rate (individual difference of the minimum beat rate) is likely to occur.
Therefore, in the present embodiment, the actual minimum number of beats of the user E is used as the minimum number of beats used for sleep detection.

Next, a temporal relationship between detection of the minimum number of beats 103d and sleep determination will be described.
In a situation where the minimum beat rate 103 d is not stored in the storage unit 103, the sleep onset determination device 100 detects the minimum beat rate 103 d without performing sleep onset determination, and stores the minimum beat rate 103 d in the storage unit 103. To do.
When the minimum beat number 103 d is stored in the storage unit 103, the sleep onset determination apparatus 100 determines the relationship between the determination value corresponding to the minimum beat number 103 d stored in the storage unit 103 and the latest beat number. Based on this, it is determined whether or not the user E has fallen asleep. Then, the minimum pulsation number detection unit 104d newly detects the minimum pulsation number 103d in the bedtime period, and updates the minimum pulsation number 103d stored in the storage unit 103 to the latest minimum pulsation number 103d. .

The determination unit 104e determines whether or not the user E has fallen asleep based on the relationship between the number of beats measured by the number-of-beats measurement unit 104c and the determination value corresponding to the minimum number of beats 103d.
For example, the determination unit 104e determines that the user E has fallen asleep when a state in which the number of beats is lower than the determination value continues for a predetermined time (for example, 2 minutes). The predetermined time is not limited to 2 minutes and can be changed as appropriate. Moreover, the determination part 104e will start determination whether the user E fell asleep, if bedtime information is received.
The determination unit 104e includes a determination value generation unit 104e1, a comparison unit 104e2, a counter 104e3, and a sleep onset determination unit 104e4.

  The determination value generation unit 104e1 generates a determination value by multiplying the minimum number of beats 103d stored in the storage unit 103 by the coefficient 103b that is also stored in the storage unit 103. The coefficient 103b is “1.12”, for example. The coefficient 103b is not limited to “1.12,” and can be changed as appropriate. The determination value generation unit 104e1 supplies the determination value to the comparison unit 104e2.

Each time the comparison unit 104e2 receives the number of beats from the number-of-beats measurement unit 104c, the comparison unit 104e2 compares the number of beats with the determination value. That is, the comparison unit 104e2 repeatedly performs comparison between the number of beats and the determination value. In the present embodiment, the comparison unit 104e2 performs comparison between the number of beats and the determination value only when the bed information is received from the bed detection unit 104b. The bed detection unit 104b may also supply bed information to the determination value generation unit 104e1, and the determination value may be generated only when the determination value generation unit 104e1 receives the bed information.
The comparison unit 104e2 counts up the counter 104e3 when the number of beats is lower than the determination value every time the comparison is performed, and clears the count value of the counter 104e3 when the number of beats is equal to or greater than the determination value. .

When the bedtime determination unit 104e4 starts to receive bedtime information, the sleep time determination unit 104e4 stores the time measured by the clock unit 101 at the reception start time, that is, the bedtime of the user E in the storage unit 103.
Further, when the count value of the counter 104e3 becomes equal to or greater than the threshold value 103c stored in the storage unit 103, the sleep onset determination unit 104e4 is in a state where the number of beats is lower than the determination value for a predetermined time (predetermined time = specific time Interval × threshold 103c) If it continues, it is determined that user E has fallen asleep. The threshold 103c is used to determine a predetermined time.
When the sleep determination unit 104e4 determines that the user E has fallen asleep, it supplies a comparison stop instruction to the comparison unit 104e2. When receiving the comparison stop instruction, the comparison unit 104e2 stops the comparison operation.
The sleep onset determination unit 104e4 stores the time measured by the clock unit 101 when it is determined that the user E has fallen asleep, that is, the sleep time of the user E in the storage unit 103. The sleep determination unit 104e4 may display the sleep time of the user E on the display unit 102.
Also, the sleep determination unit 104e4 calculates the time required for the user E to go to sleep after going to bed (hereinafter referred to as "sleep time") by subtracting the bedtime from the sleep time. The sleep onset determination unit 104e4 stores the sleep onset time in the storage unit 103. The sleep determination unit 104e4 may display the sleep time on the display unit 102.

  Next, the operation will be described. In the following, it is assumed that the minimum number of beats 103 d is already stored in the storage unit 103. FIG. 5 is a flowchart for explaining the sleep onset determination operation of the sleep onset determination apparatus 100.

  When receiving the detection signal on which the biological information (heartbeat component) is superimposed from the sensor 200, the first receiving unit 104a supplies the detection signal to the bed detection unit 104b and the pulsation rate measuring unit 104c. Based on the level of the detection signal, the bed detection unit 104b determines whether the user E is in bed (step S501). Specifically, the bed detection unit 104b determines that the user E is in bed when the level of the detection signal is equal to or higher than a predetermined level, and when the level of the detection signal is lower than the predetermined level. Determines that user E is not in bed.

  When the user E is in bed (step S501: YES), the bed detection unit 104b supplies the bed information to the pulsation rate measurement unit 104c, the comparison unit 104e2, and the sleep determination unit 104e4. When the sleep determination unit 104e4 starts receiving bedtime information, the bedtime determination unit 104e4 stores the time at that time, that is, the bedtime of the user E in the storage unit 103. While receiving bed information, the pulsation rate measuring unit 104c executes a process of measuring the pulsation rate based on the biological information superimposed on the detection signal at specific times (step S502). The pulsation number measurement unit 104c supplies the pulsation number to the comparison unit 104e2 and the minimum pulsation number detection unit 104d.

  When the comparison unit 104e2 receives the number of pulsations under the condition of receiving bed information, the comparison unit 104e2 determines whether or not the number of pulsations is lower than the determination value generated by the determination value generation unit 104e1 (step S503). . In addition, the determination value generation unit 104e1 generates a determination value by multiplying the minimum number of beats 103d and the coefficient 103b in response to the start of operation of the sleep onset determination apparatus 100.

  The comparison unit 104e2 counts up the counter 104e3 when the number of beats is lower than the determination value (step S504). On the other hand, when the number of beats is equal to or greater than the determination value, the comparison unit 104e2 clears the count value of the counter 104e3 (step S505).

Subsequently, the sleep onset determination unit 104e4 determines whether or not the count value of the counter 104e3 is equal to or greater than the threshold value 103c stored in the storage unit 103 (step S506).
When the count value of the counter 104e3 is greater than or equal to the threshold 103c (step S506: YES), the sleep onset determination unit 104e4 determines that the user E has fallen asleep (step S507).

  Subsequently, the sleep onset determination unit 104e4 calculates a sleep onset time (step S508). Specifically, the sleep determination unit 104e4 calculates the sleep time by subtracting the bedtime from the sleep time. The sleep onset determination unit 104e4 stores the sleep onset time in the storage unit 103.

  On the other hand, when the count value of the counter 104e3 is less than the threshold 103c (step S506: NO), the sleep onset determination unit 104e4 determines that the user E is awake (step S509). Thereafter, the process returns to step S601.

In FIG. 6, “52” is used as the minimum number of beats, “58.24” is used as the determination value, “10-second intervals” is used as the specific time interval, and “12” is used as the threshold value. It is the figure which showed the example of sleep determination in case.
In the example shown in FIG. 6, when the number of beats is lower than the determination value “58.24” in the situation where the user E is in bed, “1” is added to the count value, and the number of beats Is equal to or greater than the determination value “58.24”, the count value is cleared to “0”. Then, when the count value becomes “12”, it is determined to fall asleep.

  In addition to the sleep onset determination operation illustrated in FIG. 5, the sleep onset determination device 100 also performs a detection operation of the minimum number of beats 103d. Specifically, the minimum pulsation number detection unit 104d detects the minimum value of the pulsation number of the user E during the period in which bedtime information is continuously supplied, that is, the minimum pulsation number 103d. Thereafter, the minimum beat number detection unit 104 d stores the minimum beat number 103 d in the storage unit 103.

  In addition, when the minimum number of beats 103d is not stored in the storage unit 103, the determination value generation unit 104e1 cannot generate a determination value, and thus the determination unit 104e does not perform an operation. In this case, first, detection of the minimum number of beats 103d is executed.

  According to the present embodiment, a value corresponding to the minimum number of beats 103d of the user is used as the determination value. For this reason, compared with the case where the determination value is a constant value that does not vary depending on the user, erroneous determination of falling asleep due to individual differences in falling asleep can be suppressed.

  Since the determination value is a value obtained by multiplying the minimum number of beats 103d by the coefficient 103b, the determination value can be easily set according to the minimum number of beats 103d of the user E.

  When receiving the bedtime information, the determination unit 104e starts determining whether or not the user E has fallen asleep. For this reason, it becomes possible to avoid the unnecessary sleep determination of determining sleep onset when the user E is not in bed.

  The determination unit 104e determines that the user has fallen asleep when the state in which the number of beats is lower than the determination value continues for a predetermined time. For this reason, for example, the accuracy of the user's sleep detection can be increased as compared with the case where sleep is determined when the number of beats is lower than the determination value.

  Each time the comparison unit 104e2 performs comparison, the counter 104e3 counts up when the number of beats is lower than the determination value, and clears the count value when the number of beats is equal to or greater than the determination value. Then, the sleep determination unit 104e4 determines that the user E has fallen asleep when the count value of the counter 104e3 exceeds a threshold value. For this reason, it becomes possible to perform sleep onset with a simple configuration of the comparison unit 104e2, the counter 104e3, and the sleep onset determination unit 104e4.

  When the sleep determination unit 104e4 determines that the user E has fallen asleep, the comparison unit 104e2 stops the comparison. For this reason, it becomes possible to avoid an unnecessary sleep determination of executing the sleep determination of the user E even after the user E falls asleep.

Second Embodiment
In the first embodiment, each of the coefficient 103b and the threshold value 103c is fixed. On the other hand, in the second embodiment of the present invention, each of the coefficient 103b and the threshold value 103c is changed according to the attribute (for example, age) of the user E.

FIG. 7 is a diagram illustrating a sleep onset determination system 1A including a sleep onset determination apparatus 100A according to the second embodiment. In FIG. 7, the same components as those shown in FIG.
The sleep determination apparatus 100A includes a coefficient 103b and a threshold 103c that are set according to age, a point having an input unit 105, a point using a program 103a1 instead of the program 103a, and a processing unit 104 including a program 103a1. To realize the first receiving unit 104a, the bed detecting unit 104b, the pulsation number measuring unit 104c, the minimum pulsation number detecting unit 104d, the determining unit 104e, and the second receiving unit 104f, and the determining unit 104e. 2 differs from the sleep onset determination apparatus 100 shown in FIG. 2 in that it includes a determination value generation unit 104e1a instead of the determination value generation unit 104e1 and that the determination unit 104e includes a sleep onset determination unit 104e4a instead of the sleep onset determination unit 104e4. . Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 8 is a diagram illustrating an example of the coefficient 103b and the threshold 103c set for each age. The coefficient 103b and the threshold value 103c illustrated in FIG. 8 are stored in the storage unit 103. In the example illustrated in FIG. 8, coefficients X1 to X9 are set for each age as the coefficient 103b, and thresholds Y1 to Y9 are set for each age as the threshold 103c. For this reason, it becomes possible to freely set a coefficient and a threshold for each age.

  The input unit 105 is, for example, a touch panel or an operation button. The input unit 105 receives various inputs. For example, the input unit 105 receives the age of the user E. The age of the user E is an example of the attribute of the user E.

  The second receiving unit 104 f receives the age of the user E from the input unit 105. The second receiving unit 104f supplies the age of the user E to the determination value generation unit 104e1a and the sleep onset determination unit 104e4a.

When the determination value generation unit 104e1a receives the age of the user E, the determination value generation unit 104e1a determines the coefficient 103b according to the age of the user E. Specifically, the determination value generation unit 104e1a determines the coefficient corresponding to the age of the user E among the coefficients X1 to X9 as the coefficient 103b used for generating the determination value. The determination value generation unit 104e1a generates a determination value by multiplying the determined coefficient 103b and the minimum number of beats 103d.
On the other hand, when the age of the user E is not received, the determination value generation unit 104e1a determines by multiplying a predetermined coefficient (for example, coefficient X4) out of the coefficients X1 to X9 and the minimum beat number 103d. Generate a value. The predetermined coefficient is not limited to the coefficient X4 and can be changed as appropriate.

The sleep onset determination unit 104e4a has a function of changing the threshold 103c based on the age of the user E (hereinafter referred to as “threshold change function”) in addition to the function of the sleep onset determination unit 104e4. Hereinafter, the threshold value changing function will be described.
When the sleep determination unit 104e4a receives the age of the user E, the sleep sleep determination unit 104e4a determines a threshold corresponding to the age of the user E among the thresholds Y1 to Y9 as the threshold 103c used for sleep detection. The sleep onset determination unit 104e4a determines the sleep onset of the user E based on the magnitude relationship between the determined threshold 103c and the count value of the counter 104e3.

  It is known that the sleep state varies depending on the age. According to the present embodiment, the determination unit 104e determines the coefficient 103b according to the age of the user E, and generates a determination value by multiplying the determined coefficient 103b by the minimum number of beats 103d. For this reason, a determination value can be changed according to age, and it becomes possible to adjust sleep determination according to age.

  Further, the determination unit 104e changes the threshold 103c based on the age of the user E. For this reason, it becomes possible to adjust sleep determination according to age.

<Modification>
Each of the above embodiments can be variously modified. Specific modifications are exemplified below. Two or more aspects arbitrarily selected from the following examples can be appropriately combined as long as they do not contradict each other.

<Modification 1>
The determination unit 104e (for example, the sleep onset determination unit 104e4 or 104e4a) may change the threshold 103c based on the measurement interval (specific time interval) of the number of beats. For example, the sleep determination unit 104e4 or 104e4a sets the threshold based on the measurement interval (specific time interval) of the number of beats so that the multiplication result (predetermined time) of the specific time and the threshold becomes a constant value (for example, 2 minutes). 103c may be changed.

<Modification 2>
As a pulsation that causes blood flow in the user E, a pulse may be used instead of a heartbeat.

<Modification 3>
The attribute of the user E is not limited to age but can be changed as appropriate.

<Modification 4>
In the second embodiment, the coefficient 103b is set every 10 years, but the coefficient 103b may not be set every 10 years. For example, the coefficient 103b may be set every 20 years or every 30 years.

<Modification 5>
In the second embodiment, the threshold 103c is set every 10 years, but the threshold 103c may not be set every 10 years. For example, the threshold 103c may be set every 20 years or every 30 years.

<Modification 6>
In each of the embodiments described above, the bed detection unit 104b detects the bed of the user E based on the detection signal from the sensor 200.
However, the bed detection unit 104b may detect the bed of the user E when the user E operates a bed button (not shown), for example.
Further, the sensor 200 as shown in FIG. 9, specifically, the piezoelectric element 200 a provided on the head side of the user E and the piezoelectric element 200 b provided on the foot side of the user E overlap each other. In the case where the sensor 200 arranged without any other is used, the bed detection unit 104b may detect the bed of the user E when receiving the detection signal from each of the piezoelectric elements 200a and 200b.
When the sensor 200 as shown in FIG. 9 is used, the pulsation number measuring unit 104c measures the pulsation number based on, for example, the detection signal output from the piezoelectric element 200a.
The bed detection unit 104b may detect the bed of the user E when the level of the detection signal is equal to or higher than a predetermined level and the biological information is superimposed on the detection signal.

<Modification 7>
The minimum beat number detecting unit 104d updates the minimum beat number 103d already stored in the storage unit 103 to an average value of the already stored minimum beat number 103d and the newly detected minimum beat number. May be. In this case, this average value is used as the minimum number of beats 103d. The minimum beat number detection unit 104d may update the average value to an average value of the average value and the newly detected minimum beat number. This average value update operation may be executed only a predetermined number of times. In this case, the final average value then functions as a default value.

<Modification 8>
In the second embodiment, both the coefficient 103b and the threshold value 103c are changed according to the age of the user E. However, only one of the coefficient 103b and the threshold value 103c may be changed according to the age of the user E. Good.

<Modification 9>
Functional units (first receiving unit 104a, bed detection unit 104b, pulsation number measurement unit 104c, minimum pulsation number detection unit 104d, determination unit 104e, and second unit realized by the processing unit 104 executing the program. All or part of the receiving unit 104f) may be realized by an electronic circuit.

DESCRIPTION OF SYMBOLS 1,1A ... Sleeping determination system, 100,100A ... Sleeping determination apparatus, 101 ... Clock part, 102 ... Display part, 103 ... Memory | storage part, 104 ... Processing part, 104a ... 1st receiving part, 104b ... Bed detection part, 104c ... beat rate measurement unit, 104d ... minimum beat rate detection unit, 104e ... determination unit, 104e1, 104e1a ... determination unit generation unit, 104e2 ... comparison unit, 104e3 ... counter, 104e4, 104e4a ... sleep detection determination unit, 104f ... Second receiving unit, 105... Input unit.

Claims (9)

A receiving unit for receiving biological information representing pulsation causing blood flow in the user;
Based on the relationship between the number of pulsations per unit time represented by the biological information and the determination value according to the number of pulsations per unit time while the user was in the past A determination unit for determining whether the user has fallen asleep,
A sleep determination apparatus including: The determination value is a value obtained by multiplying the number of times by a coefficient.
The sleep determination apparatus according to claim 1. The determination unit further determines the coefficient according to the attribute of the user, and generates the determination value by multiplying the coefficient by the coefficient.
The sleep determination apparatus according to claim 2. The determination unit starts determining whether the user has fallen asleep when receiving the bed information indicating that the user has gone to bed,
The sleep determination apparatus according to any one of claims 1 to 3. The determination unit determines that the user has fallen asleep when the state in which the number of beats is lower than the determination value continues for a predetermined time.
The sleep determination apparatus according to any one of claims 1 to 4. The determination unit
A comparison unit that repeatedly performs comparison between the number of beats and the determination value;
A counter that counts up when the number of beats is lower than the determination value each time the comparison unit performs the comparison, and clears the count value when the number of beats is equal to or greater than the determination value;
A sleep determination unit for determining that the user has fallen asleep when the count value of the counter is equal to or greater than a threshold value,
The determination unit further changes the threshold based on the attribute of the user.
The sleep onset determination device according to any one of claims 1 to 5. When the sleep determination unit determines that the user has fallen asleep, the comparison unit stops the comparison.
The sleep determination apparatus according to claim 6. Receives biological information representing the pulsation that causes blood flow in the user,
Based on the relationship between the number of pulsations per unit time represented by the biological information and the determination value according to the number of pulsations per unit time while the user was in the past To determine whether the user has fallen asleep,
Sleep detection method. On the computer,
A receiving procedure for receiving biometric information representing pulsations that cause blood flow in the user;
Based on the relationship between the number of pulsations per unit time represented by the biological information and the determination value according to the number of pulsations per unit time while the user was in the past A determination procedure for determining whether or not the user has fallen asleep,
A program for running