JP2019024628A - Sleep environment temperature control device and sleep environment temperature control method - Google Patents

Abstract

To provide a sleep environment temperature control device with a simple and low cost configuration that can appropriately determine a deep non-REM sleep stage, and can reduce an occurrence of a wakening state while sleeping by appropriately controlling a control object device according to the determined sleep depth, thereby maintaining the deep non-REM sleep stage.SOLUTION: A sleep depth determination part 3 determines a transition period from a shallow non-REM sleep stage to a deep non-REM sleep stage, and a period of a deep non-REM sleep stage based on a period in which a body motion is occurring when it detects an occurrence of a body motion of a user based on a biological signal and detects that the user is in a bed. A temperature control part 4 controls a control object device 5 depending on whether the sleep depth is in a transition period from a shallow non-REM sleep stage to a deep non-REM sleep stage, a deep non-REM sleep stage, or other stages, that is, a wakening stage and a shallow non-REM sleep stage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sleep environment temperature control device and a sleep environment temperature control method that control a sleep environment temperature to an optimum temperature so that comfortable sleep can be realized.

  Sleep is said to be a barometer of health, and if you can wake up comfortably by a comfortable sleep, you will feel refreshed when you wake up. On the other hand, in the case of insomnia or insomnia, or when forced to sleep with a reversed day / night life due to late-night work or the like, the mood after waking is often poor. That is, regardless of whether it is conscious or unconscious, the state of sleep affects the mood and behavior at the subsequent awakening, which in turn determines the quality of daytime activity after awakening.

  Thus, sleep is a factor that has an important influence on human physical activity and mental activity. If a good sleep can be obtained, healthy physical and mental activities are guaranteed. It's okay. Conventionally, attempts have been made to control the environmental temperature during sleep for the purpose of ensuring comfortable sleep. As a technique that embodies such an attempt, for example, as described in Patent Documents 1 to 3, a sleep depth and a sleep state are determined based on a biological signal, and the determined sleep depth and sleep state are determined. The thing which controls sleep environment temperature according to it is proposed.

  Here, according to the international sleep depth criterion based on so-called sleep polysomnograph (PSG), the sleep depth is determined based on the electroencephalogram, eye movement, electromyogram, etc., and the awakening phase, REM sleep phase, shallow non-REM sleep phase, The sleep stage is divided into a shallow non-REM sleep stage and a deep non-REM sleep stage. The first non-REM sleep stage and the second non-REM sleep stage which are shallow non-REM sleep stages indicate so-called shallow sleep states, and the third non-REM sleep stage and the fourth non-REM sleep stage which are deep non-REM sleep stages are The so-called deep non-REM sleep state. In stable sleep of healthy adults, the arousal stage is 1 to 3%, the first non-REM sleep stage is several%, the second non-REM sleep stage is 50%, and the third and fourth non-REM sleep stages are 20 to 30. %, The REM sleep stage is a ratio of 20 to 30%, and it is known as a guide that REM sleep appears in a cycle of about 90 minutes.

  The techniques described in Patent Document 1 to Patent Document 3 described above all determine sleep depth based on biological signals. For example, as described in Patent Document 4 to Patent Document 6, A technique for controlling the sleep environment temperature in consideration of six stages of sleep depth in the sleep depth criterion is also proposed.

  In general, as the depth of sleep increases, the deep body temperature decreases by about 1.5 ° C., and heat dissipation from the body surface increases, so the temperature in the bed increases. Therefore, in any of the techniques, in a deep non-REM sleep state, the temperature in the bed is suddenly increased due to heat dissipation, and it is often awkward and awakened. Therefore, it is known that when control is performed to reduce the sleep environment temperature, a comfortable temperature is maintained, deep sleep is sustained, and comfortable sleep is obtained.

  In addition, in the patent document 7, the present inventor sets an induction temperature when transitioning from a shallow non-REM sleep stage to a deep non-REM sleep stage, and controls sleep environment temperature including room temperature and bed temperature based on the induction temperature. By doing this, we have proposed a technology for appropriately guiding the user from shallow sleep to deep non-REM sleep without giving the user a sense of incongruity when transitioning from shallow sleep to deep non-REM sleep.

JP 2008-119454 A JP 2009-247846 A JP 2006-198023 A JP 2003-339664 A JP 2005-152310 A JP 2005-152537 A JP, 2014-042773, A

  By the way, although the technology described in Patent Document 1 to Patent Document 7 described above performs control based on the sleep stage, it requires complex hardware and / or software to realize the control, and the cost increases. There was a problem of being invited.

  The present invention has been made in view of such circumstances, and accurately determines that it is a deep non-REM sleep stage based on a simple and low-cost configuration, and bedding such as an electric blanket in winter. And a sleep environment temperature control device capable of reducing the occurrence of arousal during sleep and maintaining a deep non-REM sleep stage by appropriately controlling controlled devices such as air conditioners such as air conditioners and electric fans in summer An object is to provide a sleep environment temperature control method.

  The sleep environment temperature control device according to the present invention that achieves the above-described object is a sleep environment temperature control device that controls a sleep environment temperature, and a biological signal detection unit that detects the user's biological signal non-invasively and unconstrained. Based on the time-series data of the biological signal detected by the biological signal detection means, based on the sleep depth determination means for determining the sleep depth of the user and the sleep depth determined by the sleep depth determination means, Temperature control means for controlling a sleep target temperature by controlling a device to be controlled having a temperature adjustment function, wherein the sleep depth determination means is based on a biological signal detected by the biological signal detection means. When detecting the occurrence of body movement and detecting that the user is in bed, from a shallow non-REM sleep stage based on the period during which the body movement is occurring A transition period to a non-REM sleep stage and a period of a deep non-REM sleep stage, and when the control target device is a bedding having a temperature adjustment function, the user is present The bedding is controlled only when it is determined that the user is present, and the bedding is turned on until a first predetermined time elapses after the user enters the floor. The sleep depth is determined by the sleep depth determining means until the second predetermined time elapses after the end of the detected body movement of the user. In response to determining that it is a transition period from the stage to the deep non-REM sleep stage, the input heat amount of the bedding is set to 50% of the input heat amount as set by the user, and after the second predetermined time has elapsed, Depth of sleep In response to determining that the sleep depth is the deep non-REM sleep stage by means, the input heat amount of the bedding is set to 30% of the input heat amount as set by the user, and the deep non-REM sleep stage from the shallow non-REM sleep stage The bed temperature control is performed with the input heat amount of the bedding set as the input heat amount of the user when the awake stage and the shallow non-REM sleep stage other than the transition period to the deep non-REM sleep stage period. It is said.

  In addition, the sleep environment temperature control device according to the present invention that achieves the above-described object is a sleep environment temperature control device that controls sleep environment temperature, wherein the biosignal detection of the user is performed non-invasively and unconstrained. A sleep depth determination unit that determines the sleep depth of the user based on time series data of the biological signal detected by the biological signal detection unit, and a sleep depth determined by the sleep depth determination unit And a temperature control means for controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function, wherein the sleep depth determination means is based on the biological signal detected by the biological signal detection means. A non-REM sleep stage that is shallow based on a period during which the body motion is occurring when the occurrence of the body motion of the person is detected and the presence of the user is detected. A transition period to a deep non-REM sleep stage and a deep non-REM sleep stage period, and the temperature control means determines whether the user is present when the control target device is an air conditioner or a fan. The fan is controlled only when it is determined that it is present, and the power of the fan is turned on until a first predetermined time elapses after the user enters the floor. From the non-REM sleep stage where the sleep depth is determined by the sleep depth determination means after the first predetermined time and until the second predetermined time elapses after the user's body movement detected. In response to determining that it is a transition period to a deep non-REM sleep stage, the power of the electric fan is turned on 50% and off 50% per minute, and after the second predetermined time has elapsed, the sleep depth determination In response to determining that the sleep depth is the deep non-REM sleep stage depending on the stage, the fan is always turned on, the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage, and the deep non-REM sleep stage In the wakefulness stage and the shallow non-REM sleep stage other than the period, the room temperature control is performed by turning on the electric power of the fan 10% and 90% per minute.

  Furthermore, the sleep environment temperature control method according to the present invention that achieves the above-described object is the sleep environment temperature control method for controlling the sleep environment temperature. A biological signal detection step for detecting by restraint, and a sleep depth determination step in which a processor that performs signal processing determines the sleep depth of the user based on time-series data of the biological signal detected in the biological signal detection step. And a temperature control step for controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined in the sleep depth determination step, and the sleep depth In the determination step, the occurrence of the user's body movement is detected based on the biological signal detected in the biological signal detection step, and the presence of the user is detected. In the temperature control step, the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the deep non-REM sleep stage period are determined based on the period during which the body movement occurs. It is determined whether or not the user is in bed, and the bedding is controlled only when it is determined that the user is in bed, and until the first predetermined time elapses after the user enters the bed The sleep depth is determined in the sleep depth determination step after the first predetermined time elapses and until the second predetermined time elapses after the detected body movement of the user is kept on. Is determined to be a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage, the input heat amount of the bedding is set to 50% of the input heat amount as set by the user, and the second predetermined amount is set. After the time has passed, In accordance with determining that the sleep depth is the deep non-REM sleep stage in the sleep depth determination step, the heat input amount of the bedding is set to 30% of the input heat amount as set by the user, and the shallow non-REM sleep stage Bed temperature control using the amount of heat input to the bedding as the amount of input heat set by the user during the awakening phase and shallow non-REM sleep phase other than the transition period from the deep non-REM sleep phase to the deep non-REM sleep phase It is characterized by performing.

  Furthermore, a sleep environment temperature control method according to the present invention that achieves the above-described object is a sleep environment temperature control method for controlling a sleep environment temperature. A biological signal detection step for detecting without restriction, and a processor that performs signal processing determines sleep depth of the user based on time-series data of the biological signal detected in the biological signal detection step. And a temperature control step in which the processor controls a sleep target temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined in the sleep depth determination step, and the sleep In the depth determination step, the occurrence of body movement of the user is detected based on the biological signal detected in the biological signal detection step, and the user is present If detected, the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the deep non-REM sleep stage period are determined based on the period during which the body movement is occurring, and in the temperature control step, the control target When the apparatus is an air conditioner and a fan, it is determined whether or not the user is present, and only when it is determined that the user is present, the fan is controlled. The electric power of the electric fan is kept on until the first predetermined time elapses after entering the floor, and after the first predetermined time elapses after the user's detected body movement is detected and the second Until the predetermined time elapses, according to determining that the sleep depth is a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage in the sleep depth determination step, the power supply of the electric fan is 50% per minute 50% off, and after the second predetermined time has elapsed, the electric power of the electric fan is always turned on according to the sleep depth determination step determining that the sleep depth is the deep non-REM sleep stage. During the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage, and in the awakening stage and the shallow non-REM sleep stage other than the deep non-REM sleep stage, the power of the fan is turned on 10% per minute and 90% It is characterized in that indoor temperature control is performed with the switch off.

  Such a sleep environment temperature control device and sleep environment temperature control method according to the present invention automatically determines a sleep depth based on a biological signal detected non-invasively and unconstrained, and sleeps according to the determined sleep depth. Control the environmental temperature. At this time, when the sleep environment temperature control device and the sleep environment temperature control method according to the present invention detect the occurrence of the user's body movement and detect that the user is present, the body movement occurs. A bedding having a temperature adjustment function as a control target device or an air conditioner having a temperature adjustment function by determining a transition period from a shallow non-REM sleep stage to a deep non-REM sleep stage and a period of a deep non-REM sleep stage based on the period being operated Control.

  In the present invention, it is possible to accurately determine that it is a deep non-REM sleep stage under a simple and low-cost configuration, and appropriately controlling the control target device according to the determined sleep depth, The occurrence of arousal during sleep can be reduced, and a deep non-REM sleep stage can be sustained.

It is a figure which shows the structure of the sleep environment temperature control apparatus shown as the 1st Embodiment of this invention. It is a figure which shows the structure of the sleep environment temperature control apparatus shown as the 1st Embodiment of this invention, and is partial sectional drawing when it sees from the arrow direction in FIG. It is a figure which shows the specific example of a user's leg temperature, the temperature inside a comforter (bed bed temperature), and the time series data of room temperature. It is a figure which shows the specific example of the time series data of a user's chest body surface temperature, leg body surface temperature, and deep body temperature which were measured corresponding to the time series data of the temperature of FIG. It is a figure which shows the specific example of a biological signal when a big body motion generate | occur | produces. It is a figure which shows the specific example of a biomedical signal when a small body motion generate | occur | produces. It is a figure which shows the specific example of the biomedical signal containing the period without a body motion. It is a figure which shows the specific example of a biomedical signal, and is a figure for demonstrating the detection of a bed leaving and bed presence. It is a figure which shows the structure of another biological signal detection part.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  This embodiment is a sleep environment temperature control device that controls the sleep environment temperature. In particular, this sleep environment temperature control device optimally controls the sleep environment temperature based on a user's biological signal.

  FIG. 1 shows a configuration representing a process of the sleep environment temperature control device shown as an embodiment of the present invention as a block, and FIG. 2 shows a partial cross-sectional view when viewed from the direction of the arrow in FIG. . That is, the sleep environment temperature control device includes a biological signal detection unit 1 that detects a biological signal of a user lying on the bed 21 and a signal amplification unit that amplifies the biological signal detected by the biological signal detection unit 1. 2, a sleep depth determination unit 3 that determines the sleep depth based on the biological signal amplified by the signal amplification unit 2, a bedding such as an electric blanket based on the sleep depth determined by the sleep depth determination unit 3, and And / or a temperature control unit 4 for controlling the sleep target temperature by controlling the control target device 5 such as an air conditioner such as an air conditioner or a fan. Of these units, at least the sleep depth determination unit 3 and the temperature control unit 4 are implemented as programs that can be executed using hardware such as a CPU (Central Processing Unit) and a memory in a computer that performs signal processing, for example. Or a dedicated processor such as a DSP (Digital Processing Unit) mounted on an expansion board that can be mounted on a computer.

  The biological signal detection unit 1 is a non-invasive and unconstrained sensor that detects a minute biological signal of a user. Specifically, the biological signal detection unit 1 includes a pressure detection tube 1a and a minute differential pressure sensor 1b that is a sensor that detects minute pressure fluctuations in the air accommodated in the pressure detection tube 1a. Thus, a non-invasive and non-constrained biological signal detection means is configured.

  As the pressure detection tube 1a, a tube having an appropriate elasticity so that the internal pressure fluctuates corresponding to the pressure fluctuation range of the biological signal is used. Further, as the pressure detection tube 1a, it is necessary to appropriately select the volume of the hollow portion of the tube in order to transmit the pressure change to the fine differential pressure sensor 1b at an appropriate response speed. When the pressure detection tube 1a cannot satisfy the appropriate elasticity and the volume of the hollow portion at the same time, the hollow portion of the pressure detection tube 1a is loaded with a core wire of an appropriate thickness over the entire length of the tube, and the volume of the hollow portion is set appropriately. Can be taken.

  Such a pressure detection tube 1 a is disposed on a hard sheet 22 laid on the bed 21. In the sleep environment temperature control device, an elastic cushion sheet 23 is laid on the hard sheet 22, and the user lies on the pressure detection tube 1a. Note that the pressure detection tube 1a may be configured to be incorporated in the cushion sheet 23 or the like to stabilize the position of the pressure detection tube 1a.

  The minute differential pressure sensor 1b is a sensor that detects minute fluctuations in pressure. In the present embodiment, a low-frequency condenser microphone type sensor is used as the fine differential pressure sensor 1b. However, the present invention is not limited to this, and any sensor having an appropriate resolution and dynamic range may be used. Good. The low-frequency condenser microphone used in the present embodiment is replaced with a general acoustic microphone that does not consider the low-frequency region, and a low-frequency region characteristic is provided by providing a chamber behind the pressure-receiving surface. Is significantly improved, and is suitable for detecting minute pressure fluctuations in the pressure detection tube 1a. In addition, this condenser microphone is excellent for measuring minute differential pressure, has a resolution of 0.2 Pa and a dynamic range of about 50 Pa, and is compared with a fine differential pressure sensor using a ceramic that is usually used. It is suitable for detecting minute pressure applied to the pressure detection tube 1a through a biological signal through the body surface and detecting minute body movement with high sensitivity. can do.

  In the present embodiment, two sets of pressure detection tubes 1a are provided so that one detects a biological signal of the user's chest region and the other detects the user's buttocks region. A biological signal is detected regardless of the person's sleeping posture. In the sleep environment temperature control device, the pressure detection tube 1a may be arranged only in one of the chest region and the buttocks region. The biological signal detected by such a biological signal detection unit 1 is supplied to the signal amplification unit 2. The sleep environment temperature control device can be easily used in daily life by adopting such a non-invasive and non-constrained configuration for detecting a biological signal, and is particularly suitable for the elderly.

  The signal amplification unit 2 amplifies the signal detected by the biological signal detection unit 1 so that it can be processed in a later processing step, and further performs an appropriate signal shaping process by removing a signal of an apparently abnormal level. Do. The biological signal time-series data amplified by the signal amplification unit 2 is supplied to the sleep depth determination unit 3.

  Based on the biological signal amplified by the signal amplification unit 2, the sleep depth determination unit 3 performs a so-called third non-REM sleep stage and a fourth non-REM sleep stage (deep non-REM sleep stage) out of the user's sleep depth. judge. That is, the sleep depth includes the awakening stage, the REM sleep stage, the first non-REM sleep stage and the second non-REM sleep stage (shallow non-REM sleep stage), and the third non-REM sleep stage and the fourth non-REM sleep stage ( There are six types of deep non-REM sleep stages), and the sleep environment temperature control device controls the sleep environment temperature by determining only the deep non-REM sleep stages. And the sleep depth determination part 3 outputs the time-series data of the biological signal, displays it on a display device (not shown), prints it with a printing device, stores it as data in the storage device, and determines the sleep depth determined. Information is supplied to the temperature controller 4.

  Based on the sleep depth determined by the sleep depth determination unit 3, the temperature control unit 4 controls the sleep environment temperature such as the temperature in the bed and the room temperature by performing on / off control of a power source (not illustrated) of the control target device 5. To do. In general, the control target device 5 is a bedding having a temperature adjustment function using a thermal mattress, an electric blanket, or the like as a specific example in winter, and using a combination of an air conditioner and a fan as a specific example in summer. Although it is an air conditioner having a temperature adjustment function, in other words, any device can be applied as the sleep environment temperature control device as long as it has a temperature adjustment function. As the bedding, in addition to an electric heating method such as a thermal mattress or an electric blanket, a temperature adjustment mat that accommodates a temperature-adjusted fluid, an air supply means that supplies temperature-adjusted air into the bed, etc. There may be. That is, the temperature control unit 4 controls the sleep environment temperature based on the sleep depth determined by the sleep depth determination unit 3.

  Such a sleep environment temperature control device performs sleep environment temperature control according to the sleep depth based on the following principle.

  FIG. 3 shows an example of time series data of the leg temperature of the user, the temperature inside the comforter (bed bed temperature), and room temperature, and FIG. 4 shows the measurement corresponding to the time series data of temperature in FIG. The example of the time series data of a user's chest body surface temperature, leg body surface temperature, and deep body temperature is shown. As can be seen from these figures, the deep body temperature decreases in the deep non-REM sleep stage, but when the deep non-REM sleep stage continues, the temperature in the bed rapidly rises due to heat dissipation from the body surface, leading to arousal.

  The sleep environment temperature control device performs control to reduce the occurrence of such arousal during sleep and to maintain a deep non-REM sleep stage.

  First, in the sleep environment temperature control device, the following method is adopted in order to accurately detect even a small body motion. In the sleep environment temperature control device, for example, when a biological signal having a value of 0 to 1000 (biological signal amplified by the signal amplification unit 2) is input, a continuous variation of 5 seconds or more continues 5 times or more. It is detected that a large body movement has occurred. For example, when a biological signal as shown as an S waveform in FIG. 5 is obtained, a period in which a variation that continues for 5 seconds or more lasts 5 times or more is detected as a period in which a large body movement has occurred. The biological signal obtained by the signal amplifying unit 2 is a signal in which various vibrations emitted from the human body are mixed, and various signals such as a body motion signal indicating a turnover including a heartbeat signal and a respiratory signal are included therein. However, in the sleep environment temperature control device, such a biological signal is used as it is without being processed to detect the occurrence of body movement. In the sleep environment temperature control device, when a biological signal having a value from 0 to 1000 is input, the upper limit threshold is set to 800 and the lower limit threshold is set to 200, and continuous fluctuations exceeding these thresholds are twice in 2 seconds. If it continues, it is detected that one small body movement has occurred. For example, when a biological signal as shown in FIG. 6 is obtained, a period in which continuous fluctuations exceeding the threshold value continue twice in 2 seconds is detected as a period in which a small body motion has occurred.

  In the sleep environment temperature control device, the period from 300 seconds to 500 seconds after the end of the body motion excluding small body motions among the body motions thus detected is changed from the shallow non-REM sleep stage to the deep non-REM sleep stage. For example, as shown in FIG. 7, when a period without such body movement continues for a certain time (for example, 501 seconds) or more, it is determined that a deep non-REM sleep stage has been reached.

This determination is performed only when the user is present. Therefore, in the sleep environment temperature control device, the determination of being in the bed and getting out of bed is performed as follows. That is, in the sleep environment temperature control apparatus, in order not to inadvertently determine instantaneous bed leaving as a bed leaving, as shown in FIG. And
| (F (Tn) −f (Tn + 1) | <15
If it is, it is determined as getting out of bed. In addition, in the sleep environment temperature control device, in order not to inadvertently determine the presence of bed even if it is instantaneously, the sampling points Tn and Tn + 1 with a 1-second pitch are consecutive for 30 seconds,
| (F (Tn) −f (Tn + 1) |> 30
Is determined to be in bed.

  In the sleep environment temperature control device, when the deep non-REM sleep stage is determined in this way, the control target device 5 is controlled as follows. The awakening stage and the shallow non-REM sleep stage mean a period other than the transition period to the deep non-REM sleep stage and the deep non-REM sleep stage.

  First, a case where an electric blanket is used as the control target device 5 will be described as an example of control in winter. In the deep non-REM sleep stage, as described above, the deep body temperature decreases by about 1.5 ° C. and the heat dissipation from the body surface increases, causing the temperature in the bed to rise and causing inadvertent awakening Let Therefore, in the sleep environment temperature control device, the input heat amount of the electric blanket as the control target device 5 is controlled as follows.

First, in the sleep environment temperature control device, the power supply of the electric blanket as the control target device 5 is turned on to start energization. Then, after the user enters the floor, for example, the electric blanket is kept on for 40 minutes, and the temperature in the bed is controlled after 40 minutes. Specifically, in the sleep environment temperature control device, after 40 minutes have elapsed, the sleep depth determination unit 3 always determines the sleep depth, and the temperature control unit 4 controls according to the sleep depth at that time. In addition, by turning on / off the power of the electric blanket, the amount of input heat is changed in units of one minute as follows.
Arousal stage and shallow non-REM sleep stage: 100% (input heat as set by the user)
Transition period to deep non-REM sleep stage: 50% (50% of heat input as set by the user)
Deep non-REM sleep stage: 30% (30% of heat input as set by the user)

  At this time, in the sleep environment temperature control device, the bed leaving such as urination at night is treated as being in the awakening stage within 40 minutes after entering the bed, and treated as being left after 40 minutes. In the sleep environment temperature control device, when bed leaving is detected by the above-described processing, the power of the electric blanket is turned off. On the other hand, when bed presence is detected after 40 minutes, the same control is performed again.

  In addition, reducing the amount of heat input to 50% as set by the user during the transition period to the deep non-REM sleep stage promotes deep non-REM sleep by providing an induction temperature as described in Patent Document 7. Because.

  In the sleep environment temperature control device, by performing such processing, the awakening during sleep is generated by turning on / off the control target device 5 according to the sleep depth without measuring the temperature in the bed. And can maintain a deep non-REM sleep stage.

  Next, as an example of control in summer, a case where a fan is used as the control target device 5 will be described. In summer, since comforters are generally thin, room temperature control is optimized rather than bed temperature control. Here, in the room where the air conditioner is installed, the temperature measurement place of the air conditioner and the bedding place are separated, so the temperature of the bedding place is about 2-3 ° C. higher than the temperature of the temperature measurement place of the air conditioner. Is normal. For this reason, users tend to be awakened due to heat in the middle of the night, and tend to lower the set temperature of the air conditioner more than necessary. In order to avoid such a situation, it is desirable to control the driving of the fan by setting the temperature of the air conditioner to a slightly higher temperature (for example, 28 ° C.). In addition, it is desirable to arrange the electric fan so that the direction of the wind is not directed toward the user and is directed upward by about 1 m from the user. This is based on the reason that the electric fan reduces the temperature distribution in the room in order to avoid the sleepiness caused by feeling the heat, especially in the deep non-REM sleep stage. And in a sleep environment temperature control apparatus, the drive of the electric fan as the control object apparatus 5 is controlled as follows.

First, in the sleep environment temperature control device, the electric power of the electric fan as the control target device 5 is turned on to start driving. As in the winter, the fan is not driven when leaving the bed, including urination at night, and control is performed only when the user is in bed. In the sleep environment temperature control device, after the user enters the floor, for example, for 40 minutes, the electric fan is kept on and the sleep depth determination unit 3 always determines the sleep depth after 40 minutes have passed. Then, according to the sleep depth at that time, room temperature is controlled by performing the power on / off operation of the electric fan under the control of the temperature control unit 4.
Arousal and shallow non-REM sleep stages: 10% (10% on and 90% off per minute)
Transition to deep non-REM sleep stage: 50% (50% on and 50% off per minute)
Deep non-REM sleep stage: 100% (always on)

  In the sleep environment temperature control device, the control target device 5 is processed according to the sleep depth without performing any processing on the detected biological signal, or measuring the temperature in the bed or the room temperature, by performing such processing. By turning on / off the power, the occurrence of wakefulness during sleep can be reduced, and a deep non-REM sleep stage can be sustained.

  The present invention is not limited to the embodiment described above.

  For example, as the biological signal detection unit 1, an air mat type detection unit as shown in FIG. 9 may be used instead of using the hollow tube described above. That is, the biological signal detection unit 30 shown in FIG. 9 is configured by connecting an air tube 30b to one end of an air mat 30a in which air is sealed, and further connecting a fine differential pressure sensor 30c to the air tube 30b. . In addition, the thing similar to what was demonstrated in the case of the biosignal detection part 1 using a hollow tube can be used for the micro differential pressure sensor 30c.

  Further, in the above-described embodiment, the threshold value and elapsed time of the biological signal used for determination of body movement, the driving amount of the control target device 5 according to the sleep depth, and the like have been described using specific values. The specific value is merely an example, and can be changed to an appropriate value according to the magnitude of the biological signal determined depending on the system, the type of the control target device 5, and the like.

  Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,30 Biosignal detection part 1a Pressure detection tube 1b, 30c Slight difference pressure sensor 2 Signal amplification part 3 Sleep depth determination part 4 Temperature control part 5 Control object apparatus 21 Bed 22 Hard sheet 23 Cushion seat 30a Air mat 30b Air tube

Claims (4)

In the sleep environment temperature control device for controlling the sleep environment temperature,
Biological signal detection means for detecting the user's biological signal non-invasively and unconstrained;
A sleep depth determination means for determining the sleep depth of the user based on time-series data of the biological signal detected by the biological signal detection means;
A temperature control means for controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined by the sleep depth determination means;
The sleep depth determination means detects the occurrence of the user's body movement based on the biological signal detected by the biological signal detection means, and detects that the user is in bed, Determine the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the period of the deep non-REM sleep stage based on the period during which body movement is occurring,
In the case where the device to be controlled is a bedding having a temperature adjustment function, the temperature control means determines whether or not the user is present and only when it is determined that the user is present. The bedding is to be controlled, and the bedding is kept on until the first predetermined time has elapsed after the user enters the floor, and after the detected body movement of the user is completed. After the first predetermined time has elapsed and until the second predetermined time has elapsed, the sleep depth determination means determines that the sleep depth is a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage. The amount of input heat of the bedding is 50% of the input amount of heat as set by the user, and after the second predetermined time has elapsed, the sleep depth determination means determines that the sleep depth is the deep non-REM sleep stage. According to The amount of heat input to the bedding is 30% of the amount of heat input as set by the user, the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage, and the arousal stage and the shallow non-REM other than the deep non-REM sleep stage A sleep environment temperature control device that performs bed temperature control using the input heat amount of the bedding as the input heat amount set by the user during the sleep stage. In the sleep environment temperature control device for controlling the sleep environment temperature,
Biological signal detection means for detecting the user's biological signal non-invasively and unconstrained;
A sleep depth determination means for determining the sleep depth of the user based on time-series data of the biological signal detected by the biological signal detection means;
A temperature control means for controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined by the sleep depth determination means;
The sleep depth determination means detects the occurrence of the user's body movement based on the biological signal detected by the biological signal detection means, and detects that the user is in bed, Determine the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the period of the deep non-REM sleep stage based on the period during which body movement is occurring,
The temperature control means determines whether or not the user is present when the device to be controlled is an air conditioner and a fan, and controls the fan only when it is determined that the user is present. The electric fan is kept on until the first predetermined time has elapsed after the user enters the floor, and after the detected body movement of the user is completed, the first Until the second predetermined time elapses and the sleep depth determination means determines that the sleep depth is a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage. The power supply is turned on 50% per minute and 50% off, and after the second predetermined time has elapsed, the sleep depth determination means determines that the sleep depth is the deep non-REM sleep stage, When the power supply of the fan is always turned on, and the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the awakening stage and the shallow non-REM sleep stage other than the deep non-REM sleep stage period, The sleep environment temperature control device is characterized in that indoor temperature control is performed with 10% ON and 90% OFF per unit. In the sleep environment temperature control method for controlling the sleep environment temperature,
A biological signal detection step of detecting the user's biological signal non-invasively and unconstrained by a predetermined biological signal detection means;
A processor that performs signal processing, a sleep depth determination step of determining the sleep depth of the user based on time-series data of the biological signal detected in the biological signal detection step;
The processor includes a temperature control step of controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined in the sleep depth determination step;
In the sleep depth determination step, when detecting the occurrence of the user's body movement based on the biological signal detected in the biological signal detection step and detecting that the user is in bed, Determine the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the period of the deep non-REM sleep stage based on the period during which the body movement is occurring,
In the temperature control step, it is determined whether or not the user is present, and the bedding is controlled only when it is determined that the user is present. Until the predetermined time elapses, the bedding is kept on and after the detected body movement of the user is detected, after the first predetermined time elapses and until the second predetermined time elapses. In addition, according to determining that the sleep depth is a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage in the sleep depth determination step, the input heat quantity of the bedding is set according to the user's setting. And after the second predetermined time has elapsed, according to determining that the sleep depth is the deep non-REM sleep stage in the sleep depth determination step, the input heat amount of the bedding is determined by the user. 30% of the input heat amount as set In the awake stage and shallow non-REM sleep stage other than the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the deep non-REM sleep stage, the input heat amount of the bedding is set according to the setting of the user. A sleep environment temperature control method characterized in that the temperature inside the bed is controlled as the amount of input heat. In the sleep environment temperature control method for controlling the sleep environment temperature,
A biological signal detection step of detecting the user's biological signal non-invasively and unconstrained by a predetermined biological signal detection means;
A processor that performs signal processing, a sleep depth determination step of determining the sleep depth of the user based on time-series data of the biological signal detected in the biological signal detection step;
The processor includes a temperature control step of controlling a sleep environment temperature by controlling a control target device having a temperature adjustment function based on the sleep depth determined in the sleep depth determination step;
In the sleep depth determination step, when detecting the occurrence of the user's body movement based on the biological signal detected in the biological signal detection step and detecting that the user is in bed, Determine the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage and the period of the deep non-REM sleep stage based on the period during which the body movement is occurring,
In the temperature control step, when the devices to be controlled are an air conditioner and a fan, it is determined whether or not the user is present, and the control of the fan is performed only when it is determined that the user is present. The electric fan is kept on until the first predetermined time has elapsed after the user enters the floor, and after the detected body movement of the user is completed, the first Until the second predetermined time elapses after the predetermined time elapses, according to determining that the sleep depth is a transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage in the sleep depth determination step. According to determining that the sleep depth is the deep non-REM sleep stage in the sleep depth determination step after the second predetermined time has elapsed, with the power supply of the fan set to 50% on and 50% off per minute. , The electric fan When the power is always turned on, and during the transition period from the shallow non-REM sleep stage to the deep non-REM sleep stage, the awakening stage other than the deep non-REM sleep stage, and the shallow non-REM sleep stage, the electric power of the fan is set to 10 per minute. A sleep environment temperature control method comprising performing indoor temperature control with% on and 90% off.