JP6078899B2 - Sleep environment temperature control device and sleep environment temperature control method - Google Patents

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 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.

  Generally, as the depth of sleep increases, the deep body temperature decreases and the heat dissipation from the body surface increases, so the temperature in the bed increases. Therefore, in any technique, in a deep sleep state, it is normal to perform control that lowers the sleep environment temperature in accordance with the temperature increase due to heat dissipation.

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

  By the way, the inventor's earnest research has revealed that there is a predetermined time lag when transitioning from shallow sleep to deep sleep. The conventional techniques including Patent Document 1 to Patent Document 6 described above do not consider this point at all. For example, in the techniques described in Patent Literature 4 to Patent Literature 6, it is possible to distinguish between a REM sleep state and a state of awakening on the way, but no mention is made of transition from shallow sleep to deep sleep. Therefore, in the prior art, by controlling based on the behavior of the biological signal indicating that the shallow sleep condition has ended, the temperature setting of the deep sleep is set even though the deep sleep stage has not yet been reached. There is a problem that the user feels uncomfortable such as cold.

  The present invention has been made in view of such circumstances, and performs optimal control when transitioning from shallow sleep to deep sleep, and leads from shallow sleep to deep sleep without giving the user a sense of incongruity. An object of the present invention is to provide a sleep environment temperature control device and a sleep environment temperature control method that can be performed.

  As a result of intensive studies on the behavior of biological signals at each sleep depth, the inventor of the present application has found a method for optimally controlling the sleep environment temperature, and has completed the present invention.

That is, the sleep environment temperature control device according to the present invention that achieves the above-described object includes the temperature in the bed of the user who uses the bedding having the temperature adjustment function and / or the room temperature of the room in which the bedding is arranged. In the sleep environment temperature control device for controlling the sleep environment temperature, the biological signal detection means for detecting the user's biological signal non-invasively and unconstrained, and gain control for the biological signal detected by the biological signal detection means The biological signal intensity calculating means for controlling the peak value to be constant by performing the calculation , calculating the intensity of the biological signal using the gain value at that time, and normalizing the calculated biological signal intensity data, and the biological signal the data are calculated normalized biosignal intensity by the intensity calculating means, and the dispersion value calculating means for calculating a variance value indicating a variation in the data for a predetermined time, the partial Based on the time series data of the variance value of the biological signal intensity obtained by the value calculation 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 an air conditioner arranged in the room and / or the bedding to control a sleep environment temperature, and the air conditioner and / or at the time of entering the floor under the operation of the user. A sleep environment temperature setting means for setting a sleep environment temperature of the bedding, and a temperature lower than the sleep environment temperature set by the sleep environment temperature setting means under the operation of the user, and an awakening stage, The target set temperature and the target set temperature for setting the target set temperature of the sleep environment temperature and the predetermined induction temperature for each of the REM sleep stage, the shallow non-REM sleep stage, and the deep non-REM sleep stage. And a derived temperature setting means.

Here, the sleep depth determination means can distinguish and determine at least a deep non-REM sleep stage and an awakening stage, a REM sleep stage, and a shallow non-REM sleep stage, which are other sleep depths, and the dispersion value Is determined to have transitioned from a shallow non-REM sleep stage to a deep non-REM sleep stage when the state of being less than or equal to a predetermined value continues for a predetermined time. Then, the air temperature control means adjusts the air conditioning so as to be the target setting temperature of the sleep environment temperature set by the target setting temperature and the induction temperature setting means according to each sleep depth determined by the sleep depth determination means. Target input corresponding to the target set temperature of the sleep environment temperature set by the target set temperature and the induction temperature setting means according to each sleep depth determined by the sleep depth determination means, which controls the device The bedding is controlled so as to have a calorific value, and in the middle of the transition time from the shallow non-REM sleep stage to the deep non-REM sleep stage, in the deep non-REM sleep stage that is lower than the target set temperature in the shallow non-REM sleep stage One of controlling the air conditioner and / or the bedding so that the induction temperature is higher than the target set temperature. If it is determined by the sleep depth determination means that the transition from the deep non-REM sleep stage to the shallow non-REM sleep stage is made, the target corresponding to the shallow non-REM sleep stage immediately without performing the control at the induction temperature The air conditioner and / or the bedding is controlled so as to have a set temperature.

In addition, the sleep environment temperature control method according to the present invention that achieves the above-described object includes the temperature in the bed of the user who uses the bedding having the temperature adjustment function and / or the room temperature of the room in which the bedding is arranged. 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, and a processor that performs signal processing include: The peak value is controlled to be constant by performing gain control on the biological signal detected in the signal detection step, and the strength of the biological signal is calculated using the gain value at that time . a biological signal strength calculation step of normalizing the data, the processor, the data of the biological signal intensity is calculated normalized by the biological signal strength calculation step, a predetermined time A variance value calculating step for calculating a variance value indicating a variation in data; and the processor sleeps based on time series data of the variance value of the biological signal intensity obtained in the variance value calculating step. The temperature which controls the sleep environment temperature by controlling the air conditioner and / or the bedding arranged in the room based on the sleep depth determination step for determining the depth and the sleep depth determined in the sleep depth determination step A control process, and a sleep environment temperature setting process for setting a sleep environment temperature of the air conditioner and / or the bedding when entering the floor via a predetermined sleep environment temperature setting means under the operation of the user; the to the original user's operation, via the predetermined target setting temperature and induced temperature setting means, a temperature lower than the set sleep environment temperature in the sleeping environment temperature setting step, waking stage REM sleep stages, shallow non-REM sleep stage, and comprises a target setting temperature of the sleeping environment temperature for each deep non-REM sleep stages, and a target setting temperature and induced temperature setting step for setting a predetermined induction temperature.

Here, in the sleep depth determination step, at least the deep non-REM sleep stage and the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage which are other sleep depths can be distinguished and determined, and the variance value Is determined to have transitioned from a shallow non-REM sleep stage to a deep non-REM sleep stage when the state of being less than or equal to a predetermined value continues for a predetermined time. And in the said temperature control process, it is set as the target setting temperature of the sleep environment temperature set in the said target setting temperature and induction temperature setting process according to each sleep depth determined in the said sleep depth determination process. Controlling the air conditioner and / or the target setting temperature of the sleep environment temperature set in the target setting temperature and the induction temperature setting step according to each sleep depth determined in the sleep depth determination step The bedding is controlled to have a corresponding target input heat amount, and is lower and deeper than the target set temperature in the shallow non-REM sleep stage in the middle of the duration from the shallow non-REM sleep stage to the deep non-REM sleep stage. While controlling the air conditioner and / or the bedding so that the induction temperature is higher than the target set temperature in the non-REM sleep stage, the sleep If it is determined that the transition from the deep non-REM sleep stage to the shallow non-REM sleep stage is performed in the degree determination step, the target set temperature corresponding to the shallow non-REM sleep stage immediately without performing the control at the induction temperature and The air conditioner and / or the bedding is controlled so as to be.

Such a sleep environment temperature control device and sleep environment temperature control method according to the present invention automatically determines the sleep depth using the dispersion value of the biosignal intensity obtained based on the biosignal detected non-invasively and without constraint. The sleep environment temperature is controlled according to the determined sleep depth. At this time, the sleep environment temperature control device and the sleep environment temperature control method according to the present invention can be generalized without individual differences by normalizing the data of the calculated biological signal intensity. The sleep environment temperature control device and the sleep environment temperature control method according to the present invention provide a shallow non-REM sleep without setting the temperature of the deep non-REM sleep stage at the time of transition from the shallow non-REM sleep stage to the deep non-REM sleep stage. The air conditioner and the bedding are controlled so that the induction temperature is induced from the stage to the deep non-REM sleep stage. On the other hand, the sleep environment temperature control device and the sleep environment temperature control method according to the present invention, when transitioning from a deep non-REM sleep stage to a shallow non-REM sleep stage, immediately performs shallow non-REM sleep without performing control at the induction temperature. The air conditioner and the bedding are controlled so that the target set temperature corresponding to the stage is reached.

  In the present invention, since the induction temperature is set at the time of transition from the shallow non-REM sleep stage to the deep non-REM sleep stage and the sleep environment temperature including the room temperature and the bed temperature is controlled based on the induction temperature, the sleep is shallow. It is possible to appropriately guide from shallow sleep to deep sleep without giving the user a sense of discomfort when transitioning from deep sleep to deep sleep.

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 flowchart which shows a series of procedures at the time of controlling sleep environment temperature in the sleep environment temperature control apparatus shown as the 1st Embodiment of this invention. It is a figure which shows the specific example of the dialog for settings, such as target setting temperature. It is a figure which shows the specific example of the time series data of heart rate intensity. It is a figure which shows the specific example of the time series data of the dispersion value of heart rate intensity. It is a figure which shows the specific example of the time series data of the determination result of the sleep depth as a specific example in the 1st Embodiment of this invention. It is a figure which shows the specific example of the time series data of target set temperature as a specific example in the 1st Embodiment of this invention. It is a figure which shows the specific example of the time series data of room temperature as a specific example in the 1st Embodiment of this invention. It is a figure which shows the specific example of the time series data of the temperature in the bed which carried out temperature control as a specific example in the 1st Embodiment of this invention. It is a figure which shows the structure of the sleep environment temperature control apparatus shown as the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of the determination result of the sleep depth as a specific example in the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of the target setting temperature as a specific example in the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of the determination result of the sleep depth as a specific example in the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of the target input heat amount as a specific example in the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of room temperature as a specific example in the 2nd Embodiment of this invention. It is a figure which shows the specific example of the time series data of the temperature in the bed where temperature control was carried out as a specific example in the 2nd Embodiment of this invention. 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.

  First, as a first embodiment of the present invention, a sleep environment temperature control device that performs feedback control based on a measured bed temperature is described.

  FIG. 1 shows a configuration representing a process of the sleep environment temperature control device shown as the first embodiment of the present invention as a block, and FIG. 2 is a partial cross-sectional view when viewed from the direction of the arrow in FIG. Show. 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 filter unit 3 that performs a filtering process on the biological signal amplified by the signal amplifying unit 2, and gain control is automatically performed on a heartbeat signal and / or a respiratory signal that has passed through the filter unit 3. Automatic gain control unit 4, signal intensity calculation unit 5 that calculates the intensity of the heart rate signal and / or respiration signal, and variance that calculates the dispersion value of the heart rate intensity and / or respiration intensity calculated by this signal intensity calculation unit 5 The heart rate intensity and / or respiratory intensity calculated by the value calculating unit 6 and the signal intensity calculating unit 5 and / or the heart rate intensity and / or respiratory intensity calculated by the variance value calculating unit 6 Based on the value, the sleep depth determination unit 7 that determines the sleep depth, and the thermal sheet 9 laid on the bed 21 based on the sleep depth determined by the sleep depth determination unit 7 and the temperature measured by the temperature sensor 10 A temperature control unit 8 that controls the temperature in the surrounding bed (sleeping environment temperature). Among these units, at least the signal intensity calculation unit 5, the variance value calculation unit 6, the sleep depth determination unit 7, and the temperature control unit 8 are, for example, a CPU (Central Processing Unit) in a computer that performs signal processing, It can be implemented as a program executable using hardware such as a memory, or can be implemented using 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. Therefore, it is suitable for detecting a minute pressure applied to the pressure detection tube 1a through a biological signal passing through the body surface. The frequency characteristic shows a substantially flat output value between 0.1 Hz and 20 Hz, and is suitable for detecting minute biological signals such as heartbeat and respiration.

  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 amplified by the signal amplifying unit 2 is supplied to the filter unit 3.

  The filter unit 3 extracts a heartbeat signal and a respiratory signal by removing unnecessary signals from the biological signal amplified by the signal amplification unit 2 using a bandpass filter or the like. That is, the biological signal detected by the biological signal detection unit 1 is a signal in which various vibrations emitted from the human body are mixed, and various types of body motion signals such as a heartbeat signal and a respiratory signal, and a body motion signal indicating a turnover are included therein. The signal is included. Among these, the heartbeat signal is a signal in which a change in pressure (that is, blood pressure) based on the pump function of the heart becomes vibration and is included in the biological signal. In addition, the respiratory signal is included in the biological signal as a change in body movement based on the movement of the lungs becomes a vibration. In the sleep environment temperature control device, this is extracted by the filter unit 3 so as to be recognized as a heartbeat signal and a respiratory signal. The heartbeat signal and the respiratory signal that have passed through the filter unit 3 are respectively supplied to the automatic gain control unit 4. Note that the sampling period of the heartbeat signal and the respiration signal is 20 milliseconds.

  The automatic gain control unit 4 is a so-called AGC circuit that automatically performs gain control so that the output of the filter unit 3 falls within a predetermined signal level range. The gain control by the automatic gain control unit 4 sets the gain so that the amplitude of the output signal becomes small when the peak value of the signal exceeds a predetermined upper limit threshold, and the peak value falls below the predetermined lower limit threshold. In such a case, the gain is set so that the amplitude increases. The automatic gain control unit 4 supplies the gain value (coefficient) when such gain control is performed to the signal strength calculation unit 5.

  The signal strength calculation unit 5 calculates the strength of the heartbeat signal and / or the respiration signal based on the gain control coefficient applied to the heartbeat signal and / or the respiration signal in the automatic gain control unit 4. In the present specification, the value based on the gain control coefficient is referred to as “intensity” and is clearly distinguished from the amplitude of the signal waveform. Specifically, the gain value obtained from the automatic gain control unit 4 described above is set to be small when the signal size is large and large when the signal size is small. Represents the signal strength in an inversely proportional relationship. Specifically, in FIG. 5 to be described later, the time-series data of 1-second pitch of the heartbeat signal intensity is shown together with the amplitude of the heartbeat signal waveform, but the gain value is inversely proportional to the envelope of the waveform amplitude. As a result, the heart rate intensity approximates the envelope of the waveform amplitude. The signal intensity calculation unit 5 normalizes the calculated heart rate signal and / or respiratory signal intensity to eliminate the individual difference and normalizes the intensity to a percentage expression value, and supplies the normalized value to the variance value calculation unit 6.

  The variance value calculation unit 6 calculates a variance value HID indicating the variation in data for a predetermined time for the signal strength data calculated by the signal strength calculation unit 5. In this embodiment, when an index indicating a variation in data sampled within a certain time until a certain time point is referred to as a variance value, the standard deviation of the data is adopted as the variance value. Yes. Specifically, assuming that the signal strength data is measured every second, the variance value calculation unit 6 calculates the variance value of the data for 50 seconds, for example, among the series of signal strength data. In this case, the process of calculating the variance value of the data for 50 seconds retroactively from a certain point in time and then calculating the variance value of the data for 50 seconds retroactively after the next one second is repeatedly performed. As a result, the variance value calculation unit 6 can obtain time-series data at intervals of 1 second with respect to variations in signal intensity (variance values). The variance value calculation unit 6 supplies the time series data thus obtained to the sleep depth determination unit 7.

  The sleep depth determination unit 7 is based on the heartbeat intensity and / or the respiratory intensity distribution value calculated by the variance value calculation unit 6, that is, the sleep depth of the user, that is, the awakening stage, the REM sleep stage, and the first non-REM sleep. The six types of the 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 (deep non-REM sleep stage) are determined. When there is a body motion, the signal shakes greatly and the variance value HID of the signal intensity also increases. Therefore, in order to remove the influence of such an abnormal value, the sleep depth determination unit 7 performs an abnormal value process such as replacing the variance value HID of the signal intensity exceeding the predetermined value with the predetermined value. Then, the sleep depth determination unit 7 outputs time series data of heart rate intensity and / or respiratory intensity, time series data of variance value HID, etc., and displays them on a display device (not shown), prints them with a printing device, and stores them. The apparatus is stored as data in the apparatus, and the determined sleep depth information is supplied to the temperature control unit 8.

  Based on the sleep depth determined by the sleep depth determination unit 7 and the temperature measured by the temperature sensor 10, the temperature control unit 8 performs on / off control of a power supply (not shown) of the thermal sheet 9 laid on the bed 21. By doing so, the temperature in the bed is controlled. The thermal sheet 9 is generally a bedding having a temperature adjustment function, such as a thermal mattress or an electric blanket. In other words, the sleep environment temperature control device is a bedding having a temperature adjustment function. In addition to sheet-like members, any material can be applied. In addition to electric heating methods such as thermal mattresses and electric blankets, a temperature-adjusting mat containing temperature-controlled fluid and temperature-controlled air The thing provided with the air supply means to supply in the bed may be used. Further, the temperature sensor 10 includes a sensor that measures the temperature in the bed around the thermal sheet 9, particularly the temperature in the bed under the knee of the user, and a sensor that measures the room temperature of the room in which the bed 21 including the thermal sheet 9 is disposed. It is composed of That is, the temperature control unit 8 controls the sleep environment temperature based on the sleep depth determined by the sleep depth determination unit 7 and the bed temperature and room temperature measured by the temperature sensor 10.

  Such a sleep environment temperature control device measures the temperature in the bed according to a series of procedures as shown in FIG. 3, and performs sleep environment temperature control according to the sleep depth. In the following description, it is assumed that processing is performed based on a heartbeat signal among biological signals.

  First, in the sleep environment temperature control apparatus, as shown in FIG. 3, in step S <b> 1, the sleep environment temperature of the thermal sheet 9 at the time of entering the floor is arbitrarily set under the operation of the user. In this step, the user himself / herself may adjust the set volume value of the temperature or input heat amount that he / she feels comfortable for falling asleep at the time of awakening at the time of entering the bed. Since the comfortable temperature in the bed at the time of awakening when entering the floor varies depending on the individual, it is assumed that each individual sets it. In addition, in the sleep environment temperature control device, the bedtime, a set time for raising to a comfortable pre-bed temperature based on the bed time, and a comfortable pre-bed temperature after bed are maintained. Time and the like may be settable. Note that the sleep environment temperature control device may be provided with a selection button for automatically setting these parameters and starting control or starting control by manual setting.

  Subsequently, in the sleep environment temperature control device, in step S2, under the operation of the user, the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage (the first non-REM sleep stage and the second non-REM sleep stage). The target set temperature of the in-bed temperature for each of the deep non-REM sleep stages (the third non-REM sleep stage and the fourth non-REM sleep stage) is arbitrarily set. In step S2, a target set temperature as an induction temperature described later is also set. This step may be set to a temperature that the user himself / herself feels comfortable at each stage, for example, by inputting a desired value using a setting dialog as shown in FIG. In addition, since the heat dissipation from the body surface increases as the sleep depth increases, the temperature set in step S2 is lower than the temperature set in step S1.

  In the sleep environment temperature control device, when the above preparation is completed and the user enters the floor, a heart rate intensity signal is captured in step S3. That is, in the sleep environment temperature control device, the biological signal detected by the biological signal detection unit 1 is amplified by the signal amplification unit 2, and unnecessary signals are removed by the filter unit 3 using a bandpass filter or the like, so that the heartbeat signal and body Detecting a motion signal. Since the body motion signal is larger than the heartbeat signal, the heartbeat signal is a signal included in the body motion signal. The body motion signal is generated during awakening and shallow sleep, and frequently occurs particularly during awakening. Therefore, the sleep environment temperature control device also uses such a phenomenon to determine the sleep depth.

  In the sleep environment temperature control device, the peak value is controlled by performing gain control on the heartbeat signal including the body motion signal by the automatic gain control unit 4, and the signal intensity (amplitude) is limited to a predetermined range. . Thereby, in the sleep environment temperature control device, the body motion signal included in the heartbeat signal is detected and eliminated as an abnormally large value, and there is an effect of improving data reliability. In the sleep environment temperature control device, the signal strength calculation unit 5 calculates the signal strength using the gain value applied to the heartbeat signal by the automatic gain control unit 4. At this time, the data of the heart rate intensity signal is sampled, for example, every second, and time series data of the heart rate intensity as shown in FIG. 5 is obtained. Here, a function proportional to the reciprocal of the gain is set as the signal strength. 5 is normalized by a predetermined intensity.

  Subsequently, in the sleep environment temperature control device, the variance value calculation unit 6 calculates the variance value HID of the heart rate intensity in step S4. Specifically, the variance value calculating unit 6 retroactively calculates from each time point, for example, a variance value (standard deviation) of data for 30 seconds. As a result, time-series data of the heartbeat intensity variance HID as shown in FIG. 6 is obtained. The heart rate intensity variance value HID shown in FIG. 6 is a variance value of data for 100 seconds, the unit of which is a percentage based on the assumed maximum heart rate intensity variance value, and the maximum scale is 45. %.

  In the sleep environment temperature control device, the sleep depth determination unit 7 determines the sleep depth in step S5. Here, it has been found by the inventor's research that the transition to the deep non-REM sleep stage does not occur suddenly from the shallow non-REM sleep stage but always occurs after a predetermined time elapses from the shallow non-REM sleep stage. Specifically, when the dispersion value HID of heart rate intensity is 3.3% or less during the shallow non-REM sleep stage and the state continues for about 600 seconds, the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage is made. Therefore, the sleep environment temperature control device lowers the sleep environment temperature according to the temperature rise due to heat dissipation in the deep sleep state, but also appropriately controls the temperature at the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage, It is characterized by induction from shallow non-REM sleep to deep non-REM sleep.

  That is, the sleep depth determination unit 7 determines the sleep depth based on the time-series data of the heartbeat intensity variance HID obtained in step S4. For example, the sleep depth determination unit 7 determines each sleep depth based on the value of the variance value HID of the heart rate intensity and its holding time (a time when a certain value satisfies a predetermined condition in terms of time). The sleep depth determination unit 7 can employ any method as long as it can appropriately determine the sleep depth using the variance value HID of the heart rate intensity.

  In step S6, the sleep environment temperature control device determines whether the sleep depth is one of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage. Here, in the sleep environment temperature control device, when it is determined that the sleep environment temperature is in one of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage, in step S7, the temperature in the bed is changed to each sleep in step S2. The temperature control unit 8 controls the temperature of the thermal sheet 9 so that the target set temperature set for the depth is reached, and the processing from step S3 is repeated. In the sleep environment temperature control device, the arousal stage, the REM sleep stage, or the shallow non-REM sleep stage is individually determined, and the target set temperature is not set individually, but as a sleep depth that is not a deep non-REM sleep stage. Judgment may be made collectively and the target set temperature may be set uniformly.

  On the other hand, in the sleep environment temperature control device, when it is determined that it is not any of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage, the process proceeds to step S8, and the dispersion value HID is equal to or less than a predetermined value. It is determined whether or not this state continues for a predetermined time. Specifically, when the state where the variance HID is 3.3% or less continues for 600 seconds, the sleep depth determination unit 7 is in the middle of the duration of 600 seconds. It is determined whether or not the state where the dispersion value HID is 3.3% or less continues for a predetermined time (for example, 200 seconds).

  Here, in the sleep environment temperature control device, it waits until the state where the dispersion value HID is 3.3% or less continues for 200 seconds, and when it continues for 200 seconds, in step S9, in the non-REM sleep stage where the temperature in the bed is shallow. The temperature control unit 8 controls the temperature of the thermal sheet 9 so that the temperature is slightly lower than the target set temperature (hereinafter referred to as induction temperature). In the sleep environment temperature control device, it is possible to eliminate the sense of incongruity caused by setting the temperature of the deep non-REM sleep stage quickly by providing an induction temperature that induces from the shallow non-REM sleep stage to the deep non-REM sleep stage. It becomes.

  Then, in the sleep environment temperature control device, in step S10, it is determined whether or not the transition to the deep non-REM sleep stage is complete. That is, the sleep depth determination unit 7 determines whether or not the state where the dispersion value HID is 3.3% or less continues for 600 seconds. In the sleep environment temperature control device, when it is determined that the transition to the deep non-REM sleep stage is made, in step S11, the temperature control unit 8 controls the thermal sheet 9 so that the bed temperature becomes the target set temperature for the deep non-REM sleep stage. The temperature is controlled and the processing from step S3 is repeated. The target set temperature here is a value lower than the induction temperature. That is, the relationship between the set temperatures at each stage is as follows: the set temperature at the time of entering the floor set at step S1> the target setting for each of the awakening stage, REM sleep stage, and shallow non-REM sleep stage set at step S2. Temperature> Induction temperature> Target set temperature for deep non-REM sleep stage.

  In the sleep environment temperature control apparatus, the sleep environment temperature can be appropriately controlled according to each sleep depth according to such a series of procedures.

  In addition, in the sleep environment temperature control device, when turning from a deep non-REM sleep stage to a shallow non-REM sleep stage, such as when turning over from a deep non-REM sleep stage, the transition is made in a short time. Control may be performed so that the sleep environment temperature for the shallow non-REM sleep stage is obtained, and control may be performed so that the target set temperature is immediately corresponding to the transition to the REM sleep stage or the awakening stage.

  In addition, it is important to promote a comfortable awakening when waking up. Therefore, it is desirable to perform temperature control to wake up by raising the deep body temperature. Therefore, in the sleep environment temperature control device, it is possible to set the scheduled wake-up time, and the target set temperature is set so as to gradually increase the temperature in the bed when the scheduled wake-up time such as 30 minutes before the scheduled wake-up time approaches May be. In the sleep environment temperature control device, by performing such control, the user's deep body temperature gradually rises and the sleep depth becomes shallow, so indoor lighting, external light, sound (alarm clock), etc. It is possible to wake up easily and comfortably by the stimulation.

  Furthermore, in the sleep environment temperature control device, control that takes into account the change in the room temperature measured by the temperature sensor 10 may be performed. Specifically, each time the room temperature decreases by 1 ° C., the target set temperature is set to the normal temperature. Raise the target temperature by 0.5 ° C. In the sleep environment temperature control device, a comfortable bed temperature can be obtained by changing the target set temperature according to a change in room temperature.

  Hereinafter, an actual control example will be described.

  First, the target set temperature condition and the sleep depth determination condition are as follows.

  That is, the target set temperature T0D in the deep non-REM sleep stage was 38 ° C. (when the room temperature was 10 ° C.). As described above, the determination of the deep non-REM sleep stage for setting the target set temperature T0D is that the state where the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) is the predetermined time tm2 (600 seconds). ) It was supposed to be done if continued. However, even if the state where the variance value HID ≦ S3 occurs intermittently, there is a high probability that it may be determined that the sleep depth is the same continuous sleep depth. Therefore, in the state where the variance value HID ≦ S3 Even if the state where the dispersion value HID ≧ S3 occurs in the meantime for a predetermined short time ts ≦ S0 (about 40 seconds), the state where the dispersion value HID ≦ S3 as a whole is the predetermined time tm2 (600 seconds). If continued, it was determined to be a continuous deep non-REM sleep stage.

  In addition, the target set temperature T0M for guiding from the shallow non-REM sleep stage to the deep non-REM sleep stage was set to 40 ° C. (when the room temperature was 10 ° C.). The determination for setting the target set temperature T0M is performed when the state where the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) continues for the predetermined time tm1 (200 seconds). As described above, even when the state where the dispersion value HID ≦ S3 occurs intermittently, the state where the dispersion value HID ≦ S3 as a whole continues for a predetermined time tm1 (200 seconds). The target set temperature T0M was set.

  Furthermore, the target set temperature T0L in the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage was uniformly 42 ° C. (when the room temperature was 10 ° C.). The determination to set the target set temperature T0L is performed when a state in which the dispersion value HID for 100 seconds exceeds the predetermined value S2 (4%) continues for a predetermined time tm3 (about 40 seconds) from the deep non-REM sleep stage. It was supposed to be. That is, when body movement or the like occurs, the target set temperature T0L is immediately set after the predetermined time tm3 has elapsed.

  Furthermore, as the control corresponding to the room temperature, the target set temperature is raised by 0.5 ° C. from the normal target set temperature every time the room temperature measured by the temperature sensor 10 decreases by 1 ° C.

  Moreover, the control content of the thermal sheet 9 is as follows.

The temperature in the bed was controlled by using a thermal sheet 9 capable of turning on / off the power supply. Specifically, the temperature control unit 8 turns on / off the power source of the thermal sheet 9, measures the temperature T1 after a predetermined time t1 has elapsed, and performs feedback control based on the temperature T1. . More specifically, assuming that the target set temperature is T0, a temperature difference A = (T1−T0) is calculated, and the same on / off control is repeated until the temperature difference A enters the target range. The target range for power on / off control is as follows.
When the temperature difference A is A1 or more and less than A2 (A1 = 1 ° C., A2 = 2 ° C.), the power supply is turned off. When the temperature difference A is A2 or more, the power supply is turned off. The temperature difference A is −A1 or less and −A2. If the temperature difference is less than -A2, the power is turned on.

  Under such conditions and control contents, the temperature in the bed was controlled while the user was actually sleeping. When the determination result of the sleep depth as shown in FIG. 7 was obtained, the target set temperature became as shown in FIG. Then, as a result of controlling the temperature in the bed under the environment where the room temperature change as shown in FIG. 9 exists, as shown in FIG. 10, the temperature control reflecting the room temperature change could be realized.

  As described above, in the sleep environment temperature control device shown as the first embodiment of the present invention, an induction temperature is set when transitioning from a shallow non-REM sleep stage to a deep non-REM sleep stage, and this induction temperature is set to this induction temperature. By controlling the temperature in the bed based on this, it is possible to guide the user to an appropriately deep non-REM sleep stage without giving the user a feeling of strangeness such as coldness. Therefore, in the sleep environment temperature control device, the deep non-REM sleep stage can be lengthened, the user can be provided with a good night sleep, and the sleep environment temperature control according to the early corresponding sleep depth can be realized. it can. In addition, in the sleep environment temperature control device, in addition to the dispersion value HID of the heart rate intensity, temporal parameters such as the predetermined times tm1, tm2, tm3, and ts described above, and the target set temperature can be arbitrarily set. Therefore, there is also an advantage that the user can easily change the sleep depth determination process.

  Next, as a second embodiment of the present invention, a sleep environment temperature control device that performs feedforward control based on sleep depth and room temperature without measuring the in-bed temperature will be described.

  In FIG. 11, the structure which represented as a block the process of the sleep environment temperature control apparatus shown as the 2nd Embodiment of this invention is shown. In addition, a partial cross-sectional view when viewed from the direction of the arrow in FIG. 11 is the same as FIG. That is, the sleep environment temperature control apparatus includes the biological signal detection unit 1, the signal amplification unit 2, the filter unit 3, the automatic gain control unit 4, the signal intensity calculation unit 5, and the variance value calculation unit 6 described as the first embodiment. In addition to the sleep depth determination unit 7, the temperature in the bed around the thermal sheet 9 laid on the bed 21 based on the sleep depth determined by the sleep depth determination unit 7 and the temperature measured by the temperature sensor 16, and And / or a temperature control unit 15 that controls the room temperature (the bed temperature and the room temperature are set as the sleep environment temperature) controlled by the air conditioner 17. Of these units, at least the signal strength calculation unit 5, the variance value calculation unit 6, the sleep depth determination unit 7, and the temperature control unit 15 use hardware such as a CPU and a memory as described above. It can be implemented as an executable program, or can be implemented using a dedicated processor such as a DSP mounted on an expansion board that can be mounted on a computer.

  The temperature control unit 15 performs on / off control of a power supply (not shown) of the thermal sheet 9 laid on the bed 21 based on the sleep depth determined by the sleep depth determination unit 7 and the temperature measured by the temperature sensor 16. By doing so, the temperature in the bed is controlled. The temperature control unit 15 can also control the room temperature by controlling the air conditioner 17 based on the sleep depth determined by the sleep depth determination unit 7 and the temperature measured by the temperature sensor 16. In addition, the temperature sensor 16 is comprised from the sensor which measures the room temperature of the room where the bed 21 is arrange | positioned. That is, the temperature control unit 15 performs the feedforward control of the sleep environment temperature based on the sleep depth determined by the sleep depth determination unit 7 and the room temperature measured by the temperature sensor 16, and the bed temperature Control bed temperature without taking measurements. That is, feedback control by measuring the bed temperature is not performed.

  Similar to the first embodiment, such a sleep environment temperature control device performs sleep environment temperature control according to the sleep depth according to a series of procedures as shown in FIG. In the following description, it is assumed that processing is performed based on a heartbeat signal among biological signals.

  First, in the sleep environment temperature control device, as shown in FIG. 3, in step S <b> 1, under the user's operation, the temperature (temperature in the bed) of the thermal sheet 9 at the time of entering the floor and the room temperature are included. Set the sleep environment temperature arbitrarily. In this process, the user himself / herself may adjust the setting volume value of the room temperature and the amount of heat input to the thermal seat 9 that he / she feels comfortable for falling asleep at the time of awakening when entering the floor. Since the sleep environment comfortable temperature at the time of awakening at the time of entering the floor is different for each individual, it is assumed that each individual sets it. In addition, in the sleep environment temperature control device, the bedtime, a set time for raising the sleep environment temperature to a comfortable pre-bed sleep environment temperature based on this bedtime, a comfortable sleep environment before bedtime It is possible to set the time for holding the temperature. Note that the sleep environment temperature control device may be provided with a selection button for automatically setting these parameters and starting control or starting control by manual setting.

  Subsequently, in the sleep environment temperature control device, in step S2, under the operation of the user, the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage (the first non-REM sleep stage and the second non-REM sleep stage). In addition, the target set temperature of the room temperature and the target set temperature of the thermal seat 9 (corresponding to the target input heat amount) are arbitrarily set for each of the deep non-REM sleep stages (the third non-REM sleep stage and the fourth non-REM sleep stage). To do. In step S2, a target set temperature as an induction temperature described later and a target input heat amount corresponding to the induction temperature are also set. This step may be set to a temperature that the user himself / herself feels comfortable at each stage, such as inputting a desired value using the setting dialog as shown in FIG. Since the heat dissipation from the body surface increases as the sleep depth increases, the temperature and input heat amount set in step S2 are lower than the temperature and input heat amount set in step S1.

  In the sleep environment temperature control device, when the above preparation is completed and the user enters the floor, a heart rate intensity signal is captured in step S3. That is, in the sleep environment temperature control device, the biological signal detected by the biological signal detection unit 1 is amplified by the signal amplification unit 2, and unnecessary signals are removed by the filter unit 3 using a bandpass filter or the like, so that the heartbeat signal and body Detecting a motion signal. Since the body motion signal is larger than the heartbeat signal, the heartbeat signal is a signal included in the body motion signal. The body motion signal is generated during awakening and shallow sleep, and frequently occurs particularly during awakening. Therefore, the sleep environment temperature control device also uses such a phenomenon to determine the sleep depth.

  In the sleep environment temperature control device, the peak value is controlled by performing gain control on the heartbeat signal including the body motion signal by the automatic gain control unit 4, and the signal intensity (amplitude) is limited to a predetermined range. . Thereby, in the sleep environment temperature control device, the body motion signal included in the heartbeat signal is detected and eliminated as an abnormally large value, and there is an effect of improving data reliability. In the sleep environment temperature control device, the signal strength calculation unit 5 calculates the signal strength using the gain value applied to the heartbeat signal by the automatic gain control unit 4. At this time, the data of the heart rate intensity signal is sampled, for example, every second, and the time series data of the heart rate intensity as shown in FIG. 5 is obtained.

  Subsequently, in the sleep environment temperature control device, the variance value calculation unit 6 calculates the variance value HID of the heart rate intensity in step S4. Specifically, the variance value calculating unit 6 retroactively calculates from each time point, for example, a variance value (standard deviation) of data for 30 seconds. Thereby, time-series data of the dispersion value HID of the heart rate intensity as shown in FIG. 6 is obtained.

  In the sleep environment temperature control device, the sleep depth determination unit 7 determines the sleep depth in step S5. Here, it has been found by the inventor's research that the transition to the deep non-REM sleep stage does not occur suddenly from the shallow non-REM sleep stage but always occurs after a predetermined time elapses from the shallow non-REM sleep stage. Specifically, when the dispersion value HID of heart rate intensity is 3.3% or less during the shallow non-REM sleep stage and the state continues for about 600 seconds, the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage is made. Therefore, the sleep environment temperature control device lowers the sleep environment temperature according to the temperature rise due to heat dissipation in the deep sleep state, but also appropriately controls the temperature at the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage, It is characterized by induction from shallow non-REM sleep to deep non-REM sleep.

  That is, the sleep depth determination unit 7 determines the sleep depth based on the time-series data of the heartbeat intensity variance HID obtained in step S4. For example, the sleep depth determination unit 7 determines each sleep depth based on the value of the variance value HID of the heart rate intensity and its holding time (a time when a certain value satisfies a predetermined condition in terms of time). The sleep depth determination unit 7 can employ any method as long as it can appropriately determine the sleep depth using the variance value HID of the heart rate intensity.

  In step S6, the sleep environment temperature control device determines whether the sleep depth is one of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage. Here, in the sleep environment temperature control device, if it is determined that the sleep environment temperature is any one of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage, in step S7, the sleep environment temperature including the room temperature and the bed temperature The temperature control unit 15 controls the temperature of the air conditioner 17 or controls the amount of heat input to the thermal seat 9 so that the target set temperature and target amount of input heat set for each sleep depth in step S2 are obtained. Then, the processing from step S3 is repeated. In the sleep environment temperature control device, the arousal stage, the REM sleep stage, or the shallow non-REM sleep stage is individually determined, and the target set temperature is not set individually, but as a sleep depth that is not a deep non-REM sleep stage. Judgment may be made collectively and the target set temperature may be set uniformly.

  On the other hand, in the sleep environment temperature control device, when it is determined that it is not any of the awakening stage, the REM sleep stage, or the shallow non-REM sleep stage, the process proceeds to step S8, and the dispersion value HID is equal to or less than a predetermined value. It is determined whether or not this state continues for a predetermined time. Specifically, when the state where the variance HID is 3.3% or less continues for 600 seconds, the sleep depth determination unit 7 is in the middle of the duration of 600 seconds. It is determined whether or not the state where the dispersion value HID is 3.3% or less continues for a predetermined time (for example, 200 seconds).

  Here, in the sleep environment temperature control device, it waits until the state where the dispersion value HID is 3.3% or less continues for 200 seconds, and when it continues for 200 seconds, in step S9, the sleep environment including room temperature and bed temperature The temperature control unit 15 controls the temperature of the air conditioner 17 so that the temperature is slightly lower than the target set temperature in the non-REM sleep stage where the temperature is shallow (hereinafter, referred to as induction temperature), or is inserted into the thermal seat 9. Control the amount of heat. In the sleep environment temperature control device, it is possible to eliminate the sense of incongruity due to the rapid setting of the temperature of the deep non-REM sleep stage by providing an induction temperature that induces from the shallow non-REM sleep stage to the deep non-REM sleep stage. It becomes.

  Then, in the sleep environment temperature control device, in step S10, it is determined whether or not the transition to the deep non-REM sleep stage is complete. That is, the sleep depth determination unit 7 determines whether or not the state where the dispersion value HID is 3.3% or less continues for 600 seconds. When it is determined that the sleep environment temperature control device has transitioned to the deep non-REM sleep stage, in step S11, the sleep environment temperature including the room temperature and the temperature in the bed becomes the target set temperature and the target input heat amount for the deep non-REM sleep stage. In addition, the temperature controller 15 controls the temperature of the air conditioner 17 or controls the amount of heat input to the thermal sheet 9, and repeats the processing from step S3. The target set temperature here is a value lower than the induction temperature. That is, the relationship between the set temperatures at each stage is as follows: the set temperature at the time of entering the floor set in step S1> the target setting for each of the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage set in step S2. Temperature (target input heat amount)> induced temperature (input heat amount corresponding thereto)> target set temperature (target input heat amount) for the deep non-REM sleep stage.

  In the sleep environment temperature control apparatus, the sleep environment temperature can be appropriately controlled according to each sleep depth according to such a series of procedures.

  Even in the second embodiment, when a transition from a deep non-REM sleep stage to a shallow non-REM sleep stage occurs, such as when turning over from a deep non-REM sleep stage, the transition occurs in a short time. Control should be performed so that the sleep environment temperature for the shallow non-REM sleep stage is instantaneously adjusted. Good.

  Also in this second embodiment, it is possible to set the scheduled wake-up time, and the target set temperature is set so as to gradually increase the in-bed temperature when the scheduled wake-up time such as 30 minutes before the scheduled wake-up time approaches. May be set.

  Furthermore, in the sleep environment temperature control device, the input heat amount control to the thermal sheet 9 taking into account the change in the room temperature measured by the temperature sensor 16 may be performed. Specifically, every time the room temperature decreases by 1 ° C. Then, the amount of heat input to the thermal sheet 9 is controlled so that the target set temperature of the bed temperature is raised by 0.5 ° C. from the normal target set temperature. In the sleep environment temperature control device, a comfortable sleep environment temperature can be obtained by changing the amount of heat input to the thermal sheet 9 according to a change in room temperature.

  Hereinafter, an actual control example will be described.

  First, a control example of the air conditioner 17 in summer will be described. The control of the sleep environment temperature by the air conditioner 17 is a control content in which a user sets a temperature that the user thinks is an appropriate temperature at the time of awakening at the time of entering the floor, and then the room temperature is lowered according to the sleep depth.

  The target set temperature condition and the sleep depth determination condition are as follows.

  That is, the target set temperature TL as the room temperature in the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage was uniformly set to 28 ° C. The determination for setting the target set temperature TL when shifting from the deep non-REM sleep stage to these stages is that the dispersion value HID for 100 seconds exceeds the predetermined value S2 (4%) from the deep non-REM sleep stage. This is performed when the predetermined time tm3 (about 40 seconds) is continued. That is, when body movement or the like occurs, the target set temperature TL is immediately set after the elapse of the predetermined time tm3.

  Further, the target set temperature TM as the room temperature for inducing from the shallow non-REM sleep stage to the deep non-REM sleep stage was set to 27 ° C. The determination for setting the target set temperature TM is performed when the state where the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) continues for the predetermined time tm1 (200 seconds). As described above, even when the state where the dispersion value HID ≦ S3 occurs intermittently, the state where the dispersion value HID ≦ S3 as a whole continues for a predetermined time tm1 (200 seconds). The target set temperature TM was set.

  Further, the target set temperature TD as the room temperature in the deep non-REM sleep stage was set to 26 ° C. As described above, the determination of the deep non-REM sleep stage for setting the target set temperature TD is performed when the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) for the predetermined time tm2 (600 seconds). ) It was supposed to be done if continued. However, even if the state where the variance value HID ≦ S3 occurs intermittently, there is a high probability that it may be determined that the sleep depth is the same continuous sleep depth. Therefore, in the state where the variance value HID ≦ S3 Even if the state where the dispersion value HID ≧ S3 occurs in the meantime for a predetermined short time ts ≦ S0 (about 40 seconds), the state where the dispersion value HID ≦ S3 as a whole is the predetermined time tm2 (600 seconds). If continued, it was determined to be a continuous deep non-REM sleep stage.

  Furthermore, at the time of getting up, the target set temperature TR as the room temperature is set so that the room temperature is raised to 29 ° C. 30 minutes before the scheduled time.

  Under such conditions, the air conditioner 17 was controlled by the temperature control unit 15 while the user was actually sleeping. When the sleep depth determination result as shown in FIG. 12 was obtained, room temperature control as shown in FIG. 13 could be realized.

  Next, a control example of the thermal sheet 9 in winter will be described. The control of the sleep environment temperature by the thermal sheet 9 is a control content in which the user sets a temperature that is considered to be an appropriate temperature at the time of awakening at the time of entering the floor, and the input heat amount is reduced according to the sleep depth from there. .

  The control content of the thermal sheet 9 is as follows.

  The temperature in the bed was controlled by using a thermal sheet 9 capable of turning on / off the power supply. Specifically, the temperature control unit 15 performs on / off control of the power source of the thermal sheet 9 according to a predetermined pattern, thereby controlling the input heat amount. At this time, the temperature in the bed is not measured at all.

The pattern of the amount of heat input to the thermal sheet 9 is as follows: within a predetermined time T = Ton + Toff (here, 100 seconds), a time Ton for turning on the power and a time Toff for turning off the power. The ratio was set in advance.
E00 pattern: Ton = 0%, Toff = 100% (0% of initial input heat amount)
E10 pattern: Ton = 10%, Toff = 90% (10% of initial input heat amount)
E20 pattern: Ton = 20%, Toff = 80% (20% of initial input heat amount)
E30 pattern: Ton = 30%, Toff = 70% (30% of initial input heat amount)
E40 pattern: Ton = 40%, Toff = 60% (40% of initial input heat amount)
E50 pattern: Ton = 50%, Toff = 50% (50% of initial input heat amount)
E60 pattern: Ton = 60%, Toff = 40% (60% of initial input heat amount)
E70 pattern: Ton = 70%, Toff = 30% (70% of initial input heat amount)
E80 pattern: Ton = 80%, Toff = 20% (80% of initial input heat amount)
E90 pattern: Ton = 90%, Toff = 10% (90% of initial input heat amount)
E100 pattern: Ton = 100%, Toff = 0% (100% of initial input heat amount)

  Moreover, the target input heat amount and the sleep depth determination conditions are as follows.

  That is, the target input heat amount in the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage was the E60 pattern (when the room temperature was 15 ° C.). The determination for setting the target input heat amount at the time of transition to these stages is that the state where the dispersion value HID for 100 seconds exceeds the predetermined value S2 (4%) from the deep non-REM sleep stage is the predetermined time tm3 (40 seconds). Degree) It was supposed to be performed if continued. That is, when body movement or the like occurs, the target input heat amount is immediately set to the E60 pattern after the predetermined time tm3 has elapsed.

  Moreover, the target input calorie | heat amount induced | guided | derived from a shallow non-REM sleep stage to a deep non-REM sleep stage was made into E40 pattern. The determination for setting the target input heat amount is performed when the state where the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) continues for the predetermined time tm1 (200 seconds). As described above, even when the state where the dispersion value HID ≦ S3 occurs intermittently, the state where the dispersion value HID ≦ S3 as a whole continues for a predetermined time tm1 (200 seconds). The target input heat amount of the E40 pattern was set.

  Furthermore, the target input calorie | heat amount in the deep non-REM sleep stage was made into E20 pattern. As described above, the determination of the deep non-REM sleep stage for setting the target input heat amount is that the state where the dispersion value HID for 100 seconds is equal to or less than the predetermined value S3 (3.3%) is the predetermined time tm2 (600 seconds). It was supposed to be done if continued However, even if the state where the variance value HID ≦ S3 occurs intermittently, there is a high probability that it may be determined that the sleep depth is the same continuous sleep depth. Therefore, in the state where the variance value HID ≦ S3 Even if the state where the dispersion value HID ≧ S3 occurs in the meantime for a predetermined short time ts ≦ S0 (about 40 seconds), the state where the dispersion value HID ≦ S3 as a whole is the predetermined time tm2 (600 seconds). If continued, it was determined to be a continuous deep non-REM sleep stage.

  Furthermore, when waking up, the target input heat amount was set to the E70 pattern so as to increase the temperature in the bed 30 minutes before the scheduled time.

  Further, as the control corresponding to the room temperature, the target input heat amount is increased by 5% from the normal target input heat amount every time the room temperature measured by the temperature sensor 16 decreases by 1 ° C.

  Under such conditions and control contents, the amount of heat input to the thermal sheet 9 was controlled while the user was actually sleeping. When the determination result of the sleep depth as shown in FIG. 14 was obtained, the target input heat amount was as shown in FIG. Then, as a result of measuring the temperature in the bed while controlling the amount of input heat in an environment where there is a change in room temperature as shown in FIG. 16, as shown in FIG. 17, the temperature control in the bed reflecting the change in room temperature is realized. I was able to.

  As described above, in the sleep environment temperature control apparatus shown as the second embodiment of the present invention, since feedforward control is performed, without performing complicated bed temperature measurement necessary for feedback control, Control of the sleep environment temperature including the temperature in the bed can be realized with an extremely simple configuration.

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

  For example, in the above-described embodiment, as a method for detecting a heartbeat signal, a method for extracting a heartbeat signal from a biological signal obtained by the unconstrained biological signal detection unit 1 laid under the user's body has been shown. However, the present invention is applicable to any detection means that can continuously obtain a heartbeat signal or a signal equivalent to the heartbeat signal. For example, the present invention can be applied as the biological signal detection unit 1 as long as it is a heart rate meter or pulse meter of the type worn on the body such as the wrist or the upper arm, and can record data continuously. is there.

  Further, as the biological signal detection unit 1, an air mat type detection unit as shown in FIG. 18 may be used instead of using the hollow tube described above. That is, the biological signal detection unit 30 shown in FIG. 18 is configured by connecting an air tube 30b to one end of an air mat 30a enclosing air therein, 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.

  Furthermore, in the above-described embodiment, the description is centered on the processing based on the heartbeat signal, but the present invention may determine the respiratory intensity and its variance based on the respiratory signal and use it for sleep depth determination. You may make it perform final sleep depth determination with the logical product of the determination by a heartbeat signal, and the determination by a respiration signal.

  Furthermore, in the above-described embodiment, the standard deviation is adopted as the variance value indicating the variation in heart rate intensity. However, the present invention may employ, for example, statistics such as variance, sum of deviation squares, and a predetermined range. .

  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 Living body signal detection part 1a Pressure detection tube 1b, 30c Slight difference pressure sensor 2 Signal amplification part 3 Filter part 4 Automatic gain control part 5 Signal intensity calculation part 6 Variance calculation part 7 Sleep depth determination part 8,15 Temperature control Part 9 Thermal sheet 10, 16 Temperature sensor 17 Air conditioner 21 Sleeper 22 Hard sheet 23 Cushion sheet 30a Air mat 30b Air tube

Claims (12)

In a sleep environment temperature control device for controlling a sleep environment temperature including a bed temperature of a user who uses a bedding having a temperature adjustment function and / or a room temperature of a room in which the bedding is disposed,
Biological signal detection means for detecting the user's biological signal non-invasively and unconstrained;
The peak value is controlled to be constant by performing gain control on the biological signal detected by the biological signal detection means, and the intensity of the biological signal is calculated using the gain value at that time, and the calculated biological signal intensity Biosignal intensity calculating means for normalizing the data of
A dispersion value calculation means for calculating a dispersion value indicating a variation in data for a predetermined time for the data of the biological signal intensity calculated and normalized by the biological signal intensity calculation means;
A sleep depth determination means for determining a sleep depth of the user based on time-series data of the dispersion values of the biological signal strength obtained by the dispersion value calculation means;
Based on the sleep depth determined by the sleep depth determination means, temperature control means for controlling the sleep environment temperature by controlling the air conditioner arranged in the room and / or the bedding ,
Under the user's operation, sleep environment temperature setting means for setting the sleep environment temperature of the air conditioner and / or the bedding when entering the floor,
Under the user's operation, the temperature is lower than the sleep environment temperature set by the sleep environment temperature setting means, and the wakefulness stage, the REM sleep stage, the shallow non-REM sleep stage, and the deep non-REM sleep stage A target setting temperature and induction temperature setting means for setting a target setting temperature of the sleep environment temperature and a predetermined induction temperature for each,
The sleep depth determination means can distinguish and determine at least a deep non-REM sleep stage and a wake stage, a REM sleep stage, and a shallow non-REM sleep stage that are other sleep depths, and the variance value is a predetermined value. When the state that is below continues for a predetermined time, it is determined that the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage,
The temperature control means controls the air conditioner so as to be a target set temperature of the sleep environment temperature set by the target set temperature and the induction temperature setting means according to each sleep depth determined by the sleep depth determination means. Control and / or the target input heat amount corresponding to the target set temperature of the sleep environment temperature set by the target set temperature and the induction temperature set unit according to each sleep depth determined by the sleep depth determination unit The bedding is controlled so that the target setting in the deep non-REM sleep stage is lower than the target set temperature in the shallow non-REM sleep stage in the middle of the duration from the shallow non-REM sleep stage to the deep non-REM sleep stage. Controlling the air conditioner and / or the bedding so that the induction temperature is higher than the temperature, When it is determined by the sleep depth determination means that the transition from the deep non-REM sleep stage to the shallow non-REM sleep stage is performed, the target set temperature corresponding to the shallow non-REM sleep stage is immediately performed without performing the control at the induction temperature. The sleep environment temperature control device characterized by controlling the air conditioner and / or the bedding. A bed temperature measuring means for measuring the temperature of the user's bed,
The temperature control means controls the sleep environment temperature by controlling the bedding based on the sleep depth determined by the sleep depth determination means and the temperature measured by the in-bed temperature measurement means. The sleep environment temperature control device according to claim 1. Room temperature measuring means for measuring the room temperature of the room in which the bedding is arranged,
The sleep environment temperature control device according to claim 2, wherein the target set temperature is changed in accordance with a change in room temperature measured by the room temperature measuring means. Room temperature measuring means for measuring the room temperature of the room,
The temperature control means controls the air conditioner and / or the bedding arranged in the room based on the sleep depth determined by the sleep depth determination means and the room temperature measured by the room temperature measurement means. The sleep environment temperature control device according to claim 1, wherein the sleep environment temperature is controlled. The sleep environment temperature control device according to claim 4, wherein the target set temperature is changed according to a change in room temperature measured by the room temperature measuring means. The temperature control means controls the air conditioner and / or the bedding so that the set temperature for the awakening stage, the REM sleep stage, and the shallow non-REM sleep stage> the induction temperature> the set temperature for the deep non-REM sleep stage. The sleep environment temperature control device according to any one of claims 2 to 5, wherein The said temperature control means controls the said air conditioner and / or the said bedding so that a sleep environment temperature may be raised at the time of awakening, The any one of Claims 2 thru | or 5 characterized by the above-mentioned. Sleep environment temperature control device. The sleep environment according to any one of claims 2 to 5, wherein the temperature control means raises the sleep environment temperature to a predetermined temperature before entering the floor based on the set entrance time. Temperature control device. The sleep environment temperature control device according to claim 1, wherein the bedding is of an electric heating type. The sleep environment temperature control device according to claim 1, wherein the bedding is a temperature adjustment mat that contains a temperature-controlled fluid. The sleep environment temperature control device according to claim 1, wherein the bedding includes air supply means for supplying temperature-adjusted air into the bed. In a sleep environment temperature control method for controlling a sleep environment temperature including a bed temperature of a user who uses a bedding having a temperature adjustment function and / or a room temperature of a room in which the bedding is disposed,
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 controls the peak value to be constant by performing gain control on the biological signal detected in the biological signal detection step, and the intensity of the biological signal is determined using the gain value at that time. A biosignal strength calculation step for calculating and normalizing the calculated biosignal strength data ;
A variance value calculating step in which the processor calculates a variance value indicating a variation in data of a predetermined time for the data of the vital signal strength calculated and normalized in the vital signal strength calculating step;
A sleep depth determination step in which the processor determines the sleep depth of the user based on time-series data of the variance values of the biological signal intensity obtained in the variance value calculation step;
Based on the determined sleep depth in the sleep depth determining step, a temperature control step of said air-conditioning device is arranged in the room and / or by controlling the bedding controlling the sleep environment temperature,
Under the user's operation, a sleep environment temperature setting step for setting the sleep environment temperature of the air conditioner and / or the bedding when entering the floor via a predetermined sleep environment temperature setting means,
Under the operation of the user, the temperature is lower than the sleep environment temperature set in the sleep environment temperature setting step via a predetermined target set temperature and induction temperature setting means, A target setting temperature and an induction temperature setting step for setting a target setting temperature of a sleep environment temperature and a predetermined induction temperature for each of a sleep stage, a shallow non-REM sleep stage, and a deep non-REM sleep stage ,
In the sleep depth determination step, at least a deep non-REM sleep stage and a wake stage, a REM sleep stage, and a shallow non-REM sleep stage which are other sleep depths can be distinguished and determined, and the variance value is a predetermined value When the state that is below continues for a predetermined time, it is determined that the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage,
In the temperature control step, the air conditioning is performed so that the sleep setting temperature set in the target setting temperature and the induction temperature setting step corresponds to each sleep depth determined in the sleep depth determination step. The device is controlled and / or corresponds to the target set temperature of the sleep environment temperature set in the target set temperature and induction temperature setting step according to each sleep depth determined in the sleep depth determination step. The bedding is controlled so as to achieve the target heat input amount, and the non-REM sleep that is lower than the target set temperature in the shallow non-REM sleep stage and deep in the duration of the transition from the shallow non-REM sleep stage to the deep non-REM sleep stage. While controlling the air conditioner and / or the bedding so that the induction temperature is higher than the target set temperature in the stage, the sleep depth determination If it is determined that the transition from the deep non-REM sleep stage to the shallow non-REM sleep stage is made, the target set temperature corresponding to the shallow non-REM sleep stage is immediately obtained without performing the control at the induction temperature. And controlling the air conditioner and / or the bedding.