JP2009247846A - Temperature management device in bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature management device in bed by which comfortable sleep can be attained depending on the sleep depth. <P>SOLUTION: In this device, heartbeat strength signal is calculated from heartbeat signal detected using heartbeat signal detection means, and heartbeat strength dispersion value of data in fixed time for the heartbeat strength signaling is calculated. The device is equipped with a sleep depth judging means 2 for judging the sleep depth from heartbeat strength dispersion value, a bed temperature measurement means 3 for measuring the temperature in bed, bedclothes 4 with a built-in temperature control means, and the temperature control means 5 for controlling the temperature in the bed depending on the sleep depth judged by the sleep depth judging means. The temperature control means for controlling the temperature in bed includes an electric blanket 4, a temperature control mat containing thermoregulated fluid, an air sheet supplying thermoregulated air into the bed, and an indoor temperature control device which regulates the indoor temperature of the room. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-bed temperature management apparatus that maintains a sleep environment so that a comfortable sleep can be realized by managing an in-bed temperature during sleep to an optimal temperature.

  The number of people with insomnia currently occupies about 20% of the people, and three shift workers account for 20% of workers. It is difficult to ensure a comfortable sleep, such as a good sleep and deep sleep, in cases where the working posture such as three shifts is irregular or in the workplace where midnight work is forced. It is difficult to secure a comfortable sleep in many cases where mental stress is applied including these situations, and ensuring a comfortable and sufficient sleep is an important issue in modern times.

  As a method for obtaining a comfortable sleep, environmental temperature management at the time of going to bed has been attracting attention along with improvement of bedding such as pillows and beds. In order to obtain a comfortable sleep, it is desirable to sleep in a temperature environment that is not too hot and not too cold, and keeping an appropriate temperature in the bed is considered an effective means for obtaining a comfortable sleep. Yes.

  Therefore, it is common to adopt means for maintaining the inside of the bed at a temperature suitable for sleeping by putting it in the bed such as an electric blanket or a fire. However, these temperature adjusting means are generally formed with the intention of maintaining a constant temperature, and do not have a function of adjusting the temperature according to a change in the body temperature of a person during sleep.

  A person's sleep cycle during sleep causes alternating periods of time when the body is active and when it is not. Further, when the sleep depth changes, the deep body temperature changes and the temperature of the sleeping person's surface changes. As a result, the temperature in the bed fluctuates, which affects the sleeping person's sleep. Although temperature control means, such as an electric blanket and a fire, have the function to maintain at the preset temperature, it cannot respond to controlling to the optimal bed temperature corresponding to the sleep depth.

  As described above, the sleeper in the bed cannot obtain a comfortable sleep only by keeping the temperature in the bed constant by using temperature adjusting means such as an electric blanket or a fire. In view of this problem, an object of the present invention is to provide an in-bed temperature management device capable of obtaining a comfortable sleep.

To achieve the above object, the in-bed temperature management apparatus according to the first solving means of the present invention calculates a heartbeat intensity signal from a heartbeat signal detected using the heartbeat signal detection means, and the heartbeat intensity signal has a predetermined time. A sleep depth determination means for calculating a heartbeat intensity dispersion value of the data in the bed and determining a sleep depth from the heartbeat intensity dispersion value; an in-bed temperature measurement means for measuring the temperature in the bed; and a bedding incorporating a temperature adjustment means And temperature control means for controlling the temperature in the bed according to the sleep depth determined by the sleep depth determination means.
It is characterized by providing.

  According to said 1st solution means, since the temperature control means which controls the temperature in the bed according to the sleep depth is provided, it is built into the bedding by the temperature control means according to the sleep depth determined by the sleep depth determination means. It is possible to control the temperature in the bed to an optimum temperature corresponding to the sleep depth by adjusting the set temperature of the temperature adjusting means. As a result, the temperature in the bed can be controlled to the optimum temperature of the sleep depth in response to the change in the deep body temperature that varies according to the sleep depth, and the bed can be maintained at a comfortable temperature.

  The second solving means of the present invention is the temperature management device in the bed according to the first solving means, wherein the bedding is an electric blanket.

  A third solving means of the present invention is the temperature management device in the bed according to the first solving means, wherein the bedding is a temperature adjustment mat that contains a temperature-controlled fluid.

  A fourth solving means of the present invention is the bed temperature management device of the first solving means, further comprising air supply means for supplying temperature-controlled air into the bed.

  The fifth solving means of the present invention is the temperature management device in the bed according to the first solving means, characterized in that it comprises room temperature adjusting means for adjusting the room temperature of the room where the bed is arranged, By managing the room where the bed is placed at a predetermined temperature, energy required for temperature control in the bed can be suppressed.

  The sixth solving means of the present invention is the bed temperature management apparatus of the first solving means, wherein the temperature control means obtains the bed temperature optimum for the sleep depth in advance and corresponds to the sleep depth. It is characterized by controlling the temperature in the bed, and a comfortable sleep can be obtained because it is maintained at a temperature corresponding to the sleep depth.

  The seventh solving means of the present invention is the bed temperature management apparatus according to the sixth solving means, wherein the temperature control means performs control so as to lower the bed temperature when shifting to a deeper sleep depth. As the depth of sleep increases, the deep body temperature decreases, and as a result the body surface temperature increases, the temperature in the bed tends to increase, but the bed temperature is controlled by lowering the temperature in the bed. It becomes possible to keep the temperature optimal.

  The eighth solving means of the present invention is the bed temperature management apparatus according to the sixth solving means, wherein the temperature control means increases the temperature in the bed when waking up to promote awakening. A comfortable awakening can be obtained.

  A ninth solving means of the present invention is the in-bed temperature management apparatus according to the first solving means, wherein the heartbeat signal detecting means detects a biological signal by means of a biological signal detecting means arranged under the body of the sleeping person. The heartbeat signal is extracted from the detected biological signal, the sleep depth can be known without restraining the body of the sleeper, and a comfortable in-bed temperature can be maintained.

  A tenth solving means of the present invention is a bed temperature management apparatus according to the ninth solving means, wherein the biological signal detecting means comprises a slight differential pressure sensor and a biological signal detecting unit, It is characterized by detecting a biological signal by detecting a change in the pressure of air contained in the inside with a differential pressure sensor, and can reliably detect a minute biological signal emitted by a lying sleeper. .

  The eleventh solving means of the present invention is the bed temperature management apparatus of the first solving means, wherein the heartbeat signal detecting means is a sphygmograph or a sphygmomanometer worn on the wrist or upper arm. It is possible to obtain a heartbeat signal necessary to know the sleep depth by a simple method.

  As described above, the in-bed temperature management device of the present invention determines the sleep depth from the sleeper's heartbeat intensity signal, and the temperature in the bed that is the sleep environment at the optimum temperature for the obtained sleep depth determination value. By controlling the temperature in the bed with the bedding with temperature control function according to the transition of sleep depth during sleep, comfortable and sufficient sleep can be achieved Realizes bed temperature control that can be realized.

  As a result, unlike conventional temperature control devices in the bed that maintain a constant temperature, it is configured to work in conjunction with changes in sleep depth, so the optimal temperature in the bed corresponding to the sleep cycle of the sleeper In addition, it is possible to manage the temperature in the bed, which can realize comfortable and sufficient sleep without using wasted energy.

  A first embodiment of the temperature control device in the bed according to the present invention will be described in detail with reference to FIGS. Further, FIG. 4 shows a second embodiment of the bed temperature management apparatus, FIG. 5 shows a third embodiment of the bed temperature management apparatus, and FIG. 6 shows a fourth embodiment of the bed temperature management apparatus. As an example, another means for detecting the sleep depth will be described with reference to FIG. In addition, this invention is not limited by said Example.

  FIG. 1 is an explanatory view for explaining the temperature control device in the bed according to the first embodiment of the present invention. As shown in FIG. 1, the in-bed temperature management apparatus 1 includes a sleep depth determination unit 2, an in-bed temperature measurement unit 3, an electric blanket 4, and a temperature control unit 5.

  The living body signal detecting means 21 of the sleeping depth determining means 2 detects a sleeping person's minute living body signal without restraining the sleeping person, extracts a heartbeat signal from the output signal, and calculates the sleep depth from the dispersion value of the intensity of the heartbeat signal. Determine. The step of determining the sleep depth will be described in detail later.

  The temperature measuring means 3 is a temperature sensor such as a thermistor. In this embodiment, the temperature measuring means 3 is provided in the vicinity of the head and the feet in the bed as shown in FIG. You may provide not only in said location but other site | parts vicinity. The output of the temperature measuring means 3 is input to a temperature control means 5 described later.

  The electric blanket 4 is a bedding with a built-in temperature adjusting means, and has a function of heating the inside of the bed by the heat generated by the heating wire provided in the electric blanket 4. As a control method of the electric blanket 4, a technique such as ON-OFF control or proportional control can be used. Although FIG. 1 shows a state where the electric blanket 4 is put on the sleeping person's body, it may be laid under the sleeping person's body.

  The temperature control means 5 optimally controls the bed temperature using the sleep depth information of the sleep depth determination means 2 and the bed temperature information of the bed temperature measurement means 3. The temperature control means 5 obtains and stores in advance indoor temperature information and bed temperature information optimal for the sleep depth, and controls the heat generation temperature of the electric blanket 4 based on these information. That is, the difference between the output of the temperature measuring means 3 and the target bed temperature is confirmed, and the electric blanket 4 is operated so as to approach the target temperature.

  Next, the configuration of the sleep depth determination means 2 shown in FIG. 2 and a method for determining the sleep depth based on the configuration will be described. The biological signal detection means 21 is a detection means for detecting a fine biological signal of the sleeping person without restraining the sleeping person, and the biological signal detection is performed by the signal amplification shaping means 22 so that the signal can be processed in a later processing step. The signal detected by the means 21 is amplified, and unnecessary signals such as respiration are removed by a band pass filter or the like.

  The biological signal detection means 21 includes a pressure sensor 21a and a pressure detection tube 21b, and constitutes a biological signal detection means that does not restrain a sleeping person. The pressure sensor 21a is a sensor that detects minute fluctuations in pressure. In this embodiment, a low-frequency condenser microphone type is used. However, the pressure sensor 21a is not limited to this, and has an appropriate resolution and dynamic range. If it is.

  The low-frequency condenser microphone used in this example is replaced with a general acoustic microphone that does not consider the low-frequency area. This is a significant improvement and is suitable for detecting minute pressure fluctuations in the pressure detection tube 21b. In addition, it is excellent for measuring minute differential pressure, has a resolution of 0.2 Pa and a dynamic range of about 50 Pa, and is several times the performance of a fine differential pressure sensor using a ceramic that is normally used. It is suitable for detecting a minute pressure applied to the pressure detection tube 21b through a biological signal through the body surface. The frequency characteristic shows an almost flat output value between 0.1 Hz and 20 Hz, and is suitable for detecting minute biological signals such as heartbeat and respiration rate.

  As the pressure detection tube 21b, a tube having an appropriate elasticity is used so that the internal pressure changes corresponding to the pressure fluctuation range of the biological signal. Further, in order to transmit the pressure change to the fine differential pressure sensor 21a at an appropriate response speed, it is necessary to appropriately select the volume of the hollow portion of the pressure detection tube 21b. When the pressure detection tube 21b cannot satisfy the appropriate elasticity and the volume of the hollow portion at the same time, the hollow portion of the pressure detection tube 21b is loaded with a core wire having an appropriate thickness over the entire length of the tube so that the volume of the hollow portion is appropriately set. Can take.

  The pressure detection tube 21b is disposed on a hard sheet 10a laid on the bed 10, and an elastic cushion sheet 10b is laid thereon, on which a sleeping person lies. Note that the pressure detection tube 21b may have a structure in which the position of the pressure detection tube 21b is stabilized by being incorporated in the cushion sheet 10b or the like.

  In this embodiment, as shown in FIG. 2, two sets of biological signal detection means 21 are provided, one of which detects the biological signal of the chest part of the sleeping person and the other of the part of the buttocks of the sleeping person. Thus, the biological signal is stably detected regardless of the sleeping posture of the sleeper, but the pressure detection tube 21a may be arranged only in one of the chest region and the buttocks region. .

  The biological signal detected by the biological signal detection means 21 is a signal in which various vibrations emitted from a human body are mixed, and includes a heartbeat signal, a respiratory signal, a turnover signal, and the like. The biological signal detected by the biological signal detection means 21 is amplified by the signal amplification shaping means 22, and an appropriate signal shaping process is performed by further removing signals that are clearly abnormal levels.

  The output signal of the signal amplification and shaping means 22 includes various signals generated by the living body such as heartbeat, respiration, and body movement, and the heartbeat signal detection means 23 detects the heartbeat signal using a bandpass filter.

  The heart rate intensity signal is detected by the automatic gain control means 24 and the signal intensity calculation means 25. The automatic gain control means 24 is a so-called AGC circuit that automatically performs gain control so that the output of the heartbeat signal detection means 23 falls within a predetermined signal level range. The gain value (coefficient) at this time is used as the signal intensity. It outputs to the calculating means 25. For gain control, for example, the gain is set so that the amplitude of the output signal decreases when the peak value of the signal exceeds the upper threshold, and the gain is increased when the peak value falls below the lower threshold. is doing.

  The signal strength calculation means 25 calculates the signal strength from the gain control coefficient applied to the biological signal in the automatic gain control means 24. It is preferable to set a function indicating the signal strength so that the gain value obtained from the AGC circuit is set to be small when the signal size is large and to be large when the signal size is small.

  The heart rate intensity variance calculating means 26 is a means for calculating a variance value of the heart rate intensity signal as an index value for determining the sleep depth. In the heart rate intensity variance calculating means 26, the variance value (standard deviation) of the 60-second data of the heart rate obtained by the signal intensity calculating means 25 is calculated. The heart rate intensity data is measured every second, and the data for 60 seconds, that is, the variance value of 60 heart rate intensity data, is determined from that point. As a result, time-series data at intervals of 1 second of variation (dispersion value) in heart rate intensity is obtained. Here, the variance value indicates a so-called statistical variance, and a standard deviation may be used instead of the variance.

  As an international standard for sleep depth, an electroencephalogram frequency analysis is performed to determine the proportion of α waves, β waves, θ waves, and δ waves, and the sleep depth is determined based on the proportion of the δ wave component. When the δ wave is as low as about 30% or less, it is determined as shallow sleep, and when the δ wave is as high as about 30% or more, it is determined as deep sleep. On the other hand, it has been confirmed by experiments of the present inventors that the dispersion value of the heart rate intensity has a high negative correlation with the proportion of the δ wave component in the electroencephalogram (correlation coefficient r = 0.7 to 0.8). That is, when the heartbeat intensity variance value is high, the ratio of the δ wave component in the brain wave is low, and conversely, when the heartbeat intensity dispersion value is low, the ratio of the δ wave component in the brain wave is high. From this, it can be determined that sleep is shallow when the variance value of heart rate intensity is high, and deep sleep when the variance value of heart rate intensity is low.

  Sleep is related to autonomic nerve activity, particularly sympathetic nervous system activity. When the ratio of sympathetic nerve component (LF) to parasympathetic nerve component (HF) (LF / HF) is large, sleep is shallow. It is known that when the ratio is small, deep sleep occurs. The inventor has confirmed through experiments that there is a high positive correlation (correlation coefficient r = 0.7) between the dispersion value of heart rate intensity and the sympathetic nervous system component. That is, it can be determined that sleep is shallow when the variance value of heart rate intensity is high, and deep sleep when the variance value of heart rate intensity is low.

  In the sleep depth calculation means 27, the relationship between the δ wave component of the electroencephalogram or the ratio of the sympathetic nerve component and the parasympathetic nerve component (LF / HF) and the variance value of the heart rate intensity is obtained in advance, and the heart rate intensity variance calculation means 26 The sleep depth is determined from the dispersion value of the heart rate intensity obtained in step 1. In addition, in the case of converting into data as the sleep stage, a dispersion value of the heart rate intensity corresponding to the break of the sleep stage is obtained, and the sleep stage is obtained from the value to obtain the sleep depth.

  Measurement data such as sleep depth values and heart rate intensity data determined by the sleep depth calculation means 27 and determination data are output to the data storage / output means 28 to be displayed on a monitor device (not shown) or printed on a printing device.

  In the above-described embodiment, an example in which a hollow tube is used as the biological signal detection means has been described. However, the air mat shown in FIG. 3 can also be used as the detection means. Here, the biological signal detection means 9 has an air tube 9b connected to one end of an air mat 9a in which air is sealed, and is connected to a slight differential pressure sensor 9c. As the fine differential pressure sensor 9c, the same sensor as that described in the case of the biological signal detection means using the hollow tube shown in FIG. 2, that is, the fine differential pressure sensor 21a can be used.

  Next, operation | movement of the temperature control apparatus 1 in the bed of this invention is demonstrated. The sleep depth determination means 2 detects a biological signal including the sleeper's heartbeat and breathing, calculates the intensity of the heartbeat signal extracted from the biological signal, and the variance value of the 60-second data of the heartbeat signal intensity. Ask for. The sleep depth is determined using the variance value of the heartbeat intensity signal as an index. The determination of the sleep depth is performed every second and is output to the temperature control means 5.

  The temperature control means 5 measures the optimal temperature in the bed corresponding to the sleep depth in advance for the sleeping person, and stores the data in the temperature control means 5. That is, for each sleeper, the temperature at which the sleeper felt comfortable sleep was obtained according to each sleep depth was measured and stored in the temperature control means 5. Or it is good also as a structure which can set the management temperature in each sleep depth and can select temperature by a user.

  The temperature control means 5 outputs a control signal for controlling the temperature of the electric blanket 4 using the optimum temperature corresponding to the sleep depth detected by the sleep depth determination means 2 as a target value for temperature control, and controls the temperature of the electric blanket 4. . As a method for controlling the electric blanket 4 by the temperature control means 5, a method such as ON-OFF control or proportional control can be used. Here, a method for controlling the temperature of the electric blanket 4 by ON-OFF control will be described. .

  The sleep depth is divided into three stages of REM sleep, shallow non-REM sleep, and deep non-REM sleep and an arousal state, and an upper limit temperature and a lower limit temperature are set in advance for each of them. When the bed temperature measuring means 3 reaches the upper limit temperature, the temperature control means 5 sends an OFF control signal to the electric blanket 4 to stop heat generation. When the bed temperature measuring means 3 reaches the lower limit temperature, the temperature control means 5 By sending an ON control signal to the electric blanket 4 to generate heat, the temperature in the bed is maintained at a temperature suitable for the sleep depth.

  Alternatively, a control method may be adopted in which a time for switching ON / OFF according to the sleep depth is set in advance and the corresponding ON / OFF switch time setting is switched when the sleep depth changes. In this case, a reference temperature is set for each of the three sleep depths of awakening and REM sleep, shallow non-REM sleep, and deep non-REM sleep, and if the temperature measuring means 3 in the bed reaches this temperature, the temperature control means 5 Starts ON-OFF switching control. As for the switching time, ON and OFF control signals are alternately output to the electric blanket 4 based on the switching setting times provided for the three sleep depths of awakening and REM sleep, shallow non-REM sleep, and deep non-REM sleep. When it is desired to maintain a high temperature, the ON time is lengthened, and when it is desired to maintain a low temperature, the ON time is shortened, whereby the bed temperature is maintained at a temperature suitable for the sleep depth.

  Overnight sleep is a REM sleep state after falling asleep, followed by a sleep cycle of about 90 cycles of non-REM sleep from the first stage to the fourth stage and then becoming a deep REM sleep state and then becoming a REM sleep state again. Appears in a minute cycle. Next, a control procedure at the time of falling asleep, at the time of sleeping and at the time of awakening will be described.

  At the time of falling asleep, the temperature control means 5 performs temperature control in which the temperature in the bed is raised above the body temperature for a certain time and the temperature is gradually lowered. It is known that when the sleeper's deep body temperature falls, it becomes easier to fall asleep, and the temperature control means 5 raises the bed's deep body temperature by increasing the bed's temperature, and then gradually raises the bed's temperature. The temperature in the bed is controlled so as to be lowered, and the sleep of the sleeping person is promoted. At the time when the sleep depth determination means 2 determines that the sleep state is entered, the temperature control means 5 ends the control at the time of falling asleep.

  The deep body temperature of the sleeper who has entered the sleep state changes according to the sleep depth. Deep body temperature decreases during deep sleep, and deep body temperature increases when sleep becomes shallow. The bed temperature rises due to the effect of heat released outside the body when the deep body temperature decreases as the sleep of the sleeper deepens. Further, during deep sleep, body movement such as turning over is lost, so heat is trapped in the bed and the temperature in the bed tends to rise rapidly. As a result, the release of heat from the body surface of the bedridden stops, so that the deep body temperature cannot be lowered and the depth of sleep is prevented from deepening, often resulting in a transition to a shallow sleep depth and awakening. The temperature control means 5 makes it possible to maintain the optimal deep body temperature corresponding to the sleep depth of the sleeper by controlling the temperature in the bed gradually to decrease as the sleep depth increases.

  A comfortable awakening is essential when waking up, and for that purpose, temperature control is required to awaken by raising the body temperature. In addition, if it occurs abruptly after deep sleep, an unpleasant feeling remains at the time of awakening, so it is desirable to gradually awaken from a deep sleep depth to a shallow sleep depth. Therefore, the temperature control means 5 performs control to gradually increase the temperature in the bed when the scheduled wake-up time approaches. As a result, the sleeper's deep body temperature gradually rises and the sleep depth becomes shallow, so that the sleep can be easily and comfortably awakened by stimulation such as indoor lighting or outside light or sound (alarm).

  FIG. 4 shows a second embodiment in which a heating mat 6 is provided as a bedding with a built-in temperature adjusting means. The thermal mat 6 includes a bag for accommodating a temperature-controlled fluid therein, and air, water, oil, or the like is used as the temperature-controlled fluid. As a method for adjusting the temperature, a temperature source is provided with a heat source in the heating mat 6 and the temperature is controlled, or a temperature adjusted by a heat source or a cooling source provided outside the heating mat 6 is flowed into the heating mat 6. There is a way to control.

  The second embodiment shown in FIG. 4 differs from the first embodiment only in that the heating mat 6 is used for the bedding incorporating the temperature adjusting means, and the other configuration is the same as that of the first embodiment. Is omitted. Moreover, in order for the temperature control means 5 to control the temperature in the bed corresponding to the sleep depth, ON-OFF control or proportional control can be used.

  FIG. 5 shows a third embodiment provided with air supply means 7 for blowing air whose temperature is adjusted in the bed, in addition to bedding incorporating temperature control means such as an electric blanket or a heat mat. Although the control may not be able to be followed when the sleep stage changes only with the temperature control means built in the bedding, it can be quickly handled by operating the air supply means 7. The air supply means 7 is directly blown into the bed, but a sheet in a bag is provided on the mattress, and a connecting portion is attached to the bed so that the temperature can be controlled comfortably without feeling uncomfortable. it can.

  The third embodiment shown in FIG. 5 includes an air supply means 7 in addition to the bedding incorporating the temperature adjusting means, and the temperature control means 5 operates the bedding incorporating the temperature adjusting means and the air supply means 7 simultaneously. You may control so that it may be operated, and you may control so that it may operate | move supplementarily when only the bedding which incorporates a temperature control means is not enough.

  FIG. 6 shows a fourth embodiment having room temperature adjusting means such as an air conditioner. The room temperature adjusting means 8 is further added to the first embodiment or the second embodiment, and the other structure is the same as the first embodiment or the second embodiment. The room temperature adjusting means 8 can be an air conditioner or a combination of a cooler and a stove.

  When the room where the bed is placed is extremely low or conversely extremely high, the temperature in the bed can be set to sleep with a configuration that includes bedding with built-in temperature control means such as an electric blanket or a heat mat or air supply means. It may be difficult to maintain an appropriate temperature corresponding to the depth. Therefore, an appropriate set temperature of the indoor temperature adjusting means 8 corresponding to the sleep depth is determined in advance, and the control means 5 transmits a control signal to the indoor temperature adjusting means 8 so that the set temperature is reached, thereby the room temperature. As a result, the temperature in the bed is easily adjusted.

  FIG. 7 shows a configuration in the case where a pulse meter or a heart rate monitor is used as the heart rate detecting means. In the embodiment shown in FIG. 2, a biological signal is detected from vibration of an air tube or an air mat placed under the user's body as a heartbeat signal detecting means for detecting the sleep depth, and the heartbeat signal is detected from the biological signal. Although the detecting means is used, it may be a pulse meter or a sphygmomanometer attached to the wrist or the upper arm, and a type of outputting data every moment. The output signal can be handled as signal data equivalent to the heartbeat signal. The sleep depth detection method is the same as that shown in FIG. 2 except for the heartbeat signal detection means.

  The bed temperature management apparatus of the present invention is configured to optimally maintain the bed temperature during sleep and directly control the temperature in the bed, so that energy can be used efficiently.

  In general, the temperature control means of the type that maintains a constant temperature, such as an electric blanket or a fire, is generally controlled to maintain the ideal bed temperature. In these methods, it is difficult to maintain the bed temperature comfortably because it does not correspond to the change in the deep body temperature according to the sleep depth of the sleeping person at the time of sleep.

  The in-bed temperature management device of the present invention is configured so that a sleeper can obtain a comfortable sleep by detecting the sleep depth during sleep and controlling the room temperature and the bed temperature optimal for the sleep depth. Therefore, it is possible to achieve a good sleep and deep sleep by maintaining an optimal temperature in the bed corresponding to the sleep depth of the sleeping person. Advantages of having a comfortable sleep and being able to lead a healthy life both physically and mentally, and because it is configured to directly control the temperature in the bed, less energy is used. There is. In view of the above, there are significant effects on industry and society in terms of health management and energy saving.

  It is explanatory drawing which shows the structure of the temperature control apparatus in the bed of a 1st Example.   It is explanatory drawing which shows the structure of a sleep depth determination means.   It is a block diagram which shows another biological signal detection means.   It is explanatory drawing which shows the structure of the temperature management apparatus in the bed of a 2nd Example.   It is explanatory drawing which shows the structure of the temperature control apparatus in the bed of a 3rd Example.   It is explanatory drawing which shows the structure of the temperature management apparatus in the bed of a 4th Example.   It is explanatory drawing which shows the structure of the sleep depth determination means using a pulse wave meter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bed temperature control apparatus 2 Sleep depth determination means 3 Bed temperature measurement means 4 Electric blanket 5 Temperature control means 6 Thermal mat 7 Air supply means 8 Indoor temperature adjustment means 9 Biosignal detection means 10 Bed 10a Hard sheet 10b Cushion sheet 21 Biological signal detection means 21a Minute differential pressure sensor 21b Pressure detection tube 22 Signal amplification shaping means 23 Heart rate signal detection means 24 Automatic gain control (AGC) means 25 Signal intensity calculation means 26 Heart rate intensity dispersion calculation means 27 Sleep depth calculation means 28 Data storage Output means 29 Pulse wave meter or heart rate monitor

Claims (11)

A heartbeat intensity signal is calculated from a heartbeat signal detected using a heartbeat signal detection means, a heartbeat intensity variance value of data within a predetermined time of the heartbeat intensity signal is calculated, and sleep depth is determined from the heartbeat intensity variance value Depth determination means;
A bed temperature measuring means for measuring the temperature in the bed;
Bedding with built-in temperature control means;
A bed temperature management device comprising: temperature control means for controlling a sleep environment temperature in accordance with the sleep depth determined by the sleep depth determination means.   The in-bed temperature management apparatus according to claim 1, wherein the bedding is an electric blanket.   The in-bed temperature management apparatus according to claim 1, wherein the bedding is a temperature adjustment mat that contains a temperature-controlled fluid.   The in-bed temperature management apparatus according to claim 1, further comprising air supply means for supplying temperature-controlled air into the bed.   The in-bed temperature management apparatus according to claim 1, further comprising room temperature adjusting means for adjusting the room temperature of the room in which the bed is arranged.   The in-bed temperature management apparatus according to claim 1, wherein the temperature control unit obtains a sleep environment temperature optimum for a sleep depth in advance and controls the sleep environment temperature corresponding to the sleep depth.   The in-bed temperature management apparatus according to claim 6, wherein the temperature control unit controls the temperature of the sleep environment to be lowered when the sleep depth is shifted to a deeper sleep depth.   The in-bed temperature management apparatus according to claim 6, wherein the temperature control means promotes awakening by increasing the temperature in the bed when waking up.   2. The bed according to claim 1, wherein the heartbeat signal detecting means detects a biological signal by a biological signal detecting means arranged under the body of the subject, and extracts a heartbeat signal from the detected biological signal. Temperature management device.   The biological signal detection means includes a fine differential pressure sensor and a biological signal detection unit, and detects a biological signal by detecting a change in pressure of air stored in the biological signal detection unit with the fine differential pressure sensor. The temperature management apparatus in a bed according to claim 9, wherein   The in-bed temperature management apparatus according to claim 1, wherein the heartbeat signal detecting means is a pulse meter or a blood pressure monitor attached to a wrist or an upper arm.

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