JP2013128659A - Portable respiration induction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable respiration induction apparatus which can be easily carried by a user, does not limit any available place, and makes the user respire in accordance with a constant respiration rhythm to induce the body and spirit of the user into sufficiently relaxed conditions.SOLUTION: The portable respiration induction apparatus includes an apparatus body 20 including: a detection part 11 detecting detection signals from the fingers of the user; a heartbeat calculating part 12 calculating the heartbeat variation curve from the detection signals detected by the detection part 11; a storage part 13 storing a guiding respiration rhythm; and a display part 14 displaying the heartbeat variation curve calculated by the heartbeat calculating part 12, and the guiding respiration rhythm stored in the storage part 13. The apparatus body 20 comprises an upper-side body 21 and a lower-side body 22 which are turnably pivoted, and allows the finger of the user to be placed between the upper-side body 21 and the lower-side body 22.

Description

  The present invention is a portable breathing guidance device that guides a user's mind and body to a sufficiently relaxed state by causing the user to breathe according to a breathing rhythm for guide.

  The heart at rest does not have a regular rhythm like a pacemaker, and the heart rate is very irregular even in a resting state, and the value between successive heartbeats changes. Such a naturally changing heart rate is called heart rate variability (HRV).

  Normal heart rate fluctuations are controlled by the interaction of the two nerves of the autonomic nervous system, the sympathetic nerve and the parasympathetic nerve. Specifically, sympathetic nerves increase heart rate while parasympathetic nerves decrease heart rate. A common effect of sympathetic nerves and parasympathetic nerves is to promote appropriate reactions inside and outside the body in order to maintain the work of the blood vessels of the heart.

  Analysis of heart rate variability, or HRV, provides clues for studying autonomic nervous system function and balance. HRV is an important indicator of physiological flexibility and responsiveness and health and effectively reflects the ability of the human body to adapt to stress and the environment. Specifically, emotional stress due to anger, disappointment, anxiety, etc. makes the heart rate fluctuation irregular and unstable, so that the HRV curve is disturbed and the peaks of the waveform are scattered. From a physiological point of view, this proves that the signals generated by the two autonomic nerves (sympathetic and parasympathetic) are not synchronized. On the other hand, normal emotions such as joy and fun stabilize the heart rate pattern and make it a smooth sine wave.

  As a result of research on HRV, if the HRV curve is a smooth sine wave, the physiological system of the human body becomes more effective, the emotions become stable, the thoughts become clearer, and the cognitive function is improved. In other words, physical and cerebral activities are improved, and work efficiency is increased. Such a state is called a relaxed state for physiology.

  It is also known that the breathing pattern affects the heartbeat pattern, and slowing the breathing rhythm slows the heartbeat. That is, the constant slow breathing rhythm can make the body weak and relax the emotions. However, since the respiratory rhythm described above uses nerves, it is usually not easy to maintain such a respiratory rhythm. Therefore, Patent Document 1 discloses an apparatus for guiding a user to a relaxed state by displaying a figure or the like for inducing a breathing rhythm on a screen capable of developing an image over the entire visual field of the user.

JP 2010-104455 A

  However, many of the facilities for training to relieve stress have to install software on a personal computer and connect a connection cord or sensor for detecting signals to the human body, which makes the facility large and complicated to operate. Therefore, the applicable range and place are limited. For example, the breathing guidance device disclosed in Patent Document 1 also requires a dedicated private room having a chair on which a user is seated, a video presentation device that can display video, and an acoustic presentation device that provides a sound environment. Therefore, the place is limited and the manufacturing cost is enormous, so that it is difficult to use it at home and in individuals.

  The present invention is proposed in view of the above problems, and can be used easily at home and in individuals, and can be used without being limited to a place. An object of the present invention is to provide a portable breathing guidance device that can guide a person to a relaxed state.

A portable respiratory guidance device according to the present invention includes a detection unit that detects a detection signal from a user's finger, a heart rate calculation unit that calculates a heart rate variability curve from the detection signal detected by the detection unit, and a guide respiratory rhythm. An apparatus main body comprising a storage unit for storing; a display unit for displaying the heart rate variability curve calculated by the heart rate calculating unit and the breathing rhythm for guide stored in the storage unit; An upper main body and a lower main body that are pivotally supported by each other, and the user's finger can be disposed between the upper main body and the lower main body.
With this configuration, it is possible to easily guide the user to a relaxed state. Moreover, since it is the structure which a user can carry easily, a user can use this invention regardless of a place. Here, the user means a person who uses the portable respiratory guidance device of the present invention.

The portable respiratory guidance device according to the present invention is based on the heart rate variability curve calculated by the heart rate calculator, and the user's relaxed state is a low relaxed state, a moderate relaxed state, and a high relaxed state, respectively. It has the evaluation part evaluated from a ratio, It is characterized by the above-mentioned.
With this configuration, the user's relaxed state can be evaluated in detail and accurately.

The portable respiratory guidance device according to the present invention is characterized in that the display unit displays the relaxed state of the user evaluated by the evaluation unit.
With this configuration, the user can easily confirm the user's own relaxed state.

The portable respiratory guidance device of the present invention calculates a respiratory rate of the user from the heart rate variability of the user and adjusts the guide respiratory rhythm to a respiratory rhythm corresponding to the respiratory rate of the user. It has the adjustment part.
With this configuration, it is possible to set a breathing rhythm according to the user, and to guide the user to a relaxed state more easily.

The portable respiratory guidance device of the present invention displays the guide respiratory rhythm by changing a predetermined figure.
With this configuration, when the user breathes in accordance with a change in a predetermined figure, the user's breathing can be easily guided to a constant breathing rhythm.

  In the present invention, by using a respiratory induction technology and a biological feedback technology, a user's heart rate is measured and heart rate information is analyzed, thereby monitoring physiological changes (heart rate variability and pulse waveform) and relaxation state changes. While measuring, the user adjusts his / her breathing to the guide breathing rhythm, which helps the user's mental concentration, controls emotions, calms the autonomic nervous system, and raises the level of mental and physical health. Can be guided to a relaxed state.

BRIEF DESCRIPTION OF THE DRAWINGS The whole explanatory view of the portable respiration guidance device of this embodiment. The block diagram of the portable breathing guidance apparatus of this embodiment. Explanatory drawing which shows an example of the use condition of the portable breathing guidance apparatus of this embodiment. The figure which shows a volume pulse waveform. (A)-(f) The figure which shows an example of the respiration guidance screen displayed on the display part of the portable respiration guidance apparatus of this embodiment. The figure which shows an example of the evaluation screen displayed on the display part of the portable breathing guidance apparatus of this embodiment. The flowchart which shows the first half part of the process sequence of the portable breathing guidance apparatus of this embodiment. The flowchart which shows the second half part of the process sequence of the portable breathing guidance apparatus of this embodiment.

  A portable respiratory guidance device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall explanatory view of the portable respiratory guidance device of the present embodiment, FIG. 2 is a block diagram of the portable respiratory guidance device of the present embodiment, and FIG. 3 is an example of the usage state of the portable respiratory guidance device of the present embodiment. It is explanatory drawing which shows.

<Configuration of portable respiratory guidance device of this embodiment>
The portable respiratory guidance device 10 of this embodiment includes a detection unit 11 that detects a detection signal from a user's finger, a heart rate calculation unit 12 that calculates a heart rate variability curve from the detection signal detected by the detection unit 11, and a guide. The apparatus main body 20 includes a storage unit 13 that stores a respiratory rhythm, and a display unit 14 that displays a heart rate variability curve calculated by the heart rate calculation unit 12 and a guide respiratory rhythm stored in the storage unit 13. The apparatus main body 20 includes an upper main body 21 and a lower main body 22 that are pivotally supported. Furthermore, as shown in FIG. 3, the portable breathing guidance apparatus 10 is used by placing a user's finger F between the upper body 21 and the lower body 22. Here, the user is a person who wears the portable breathing guidance device 10 on his / her finger F and breathes in accordance with the guide breathing rhythm displayed on the display unit 14 of the portable breathing guidance device 10. .

  The detection part 11 is comprised from the non-invasive sensor, for example, the infrared sensor which is an optical sensor. Specifically, the detection unit 11 includes a light emitting unit and a light receiving unit (not shown). The light emitting unit emits red light and infrared light, and these lights are transmitted (or reflected) through the user's fingertips and the like. Is measured at the light receiving portion. That is, like the pulse oximeter that detects the user's heart rate via the user's finger, the detection unit 11 detects a pulse signal that is a human body detection signal from the user's finger.

  The detection unit 11 also samples the pulse signal at 100 Hz to determine the heart beat interval, and further samples the heart beat interval at 4 Hz to identify heart rate variability (HRV). A normal human has an average heart rate of 72 per minute (this corresponds to a beat interval of 0.833 seconds, in other words, 833 milliseconds). In addition, the heart rate changes corresponding to breathing. Specifically, the heart rate increases during inhalation and decreases when exhaled. The average value of this change in heart rate is between 50 and 60 milliseconds for adults and between about 20 and 25 milliseconds for elderly people. Furthermore, it is because it is known by some studies that the heart rate of an adult has a variation of about 10%. By sampling the heart rate at 4 Hz, it is possible to identify when the user inhales and exhales air.

  In the present embodiment, the detection unit 11 attaches the portable respiratory guidance device 10 to the user's finger F, thereby sensing the user's heartbeat and starting detection of the user's pulse signal.

  The heart rate calculation unit 12 is provided in the control unit 15 to be described later, collects the pulse signals detected by the detection unit 11, and calculates a volume pulse waveform by performing processing to be described later. Here, each heartbeat (pulse beat) forms one pulse shown by pulses P1 to P5 as shown in FIG.

  After detecting the heart beat, the heart rate calculation unit 12 calculates the time interval between two consecutive heart beats, that is, the RR interval (unit: ms, the configuration of the RR interval between successive heart beats). HRV curve is calculated by sampling at 4 Hz. The heart rate calculator 12 of the present embodiment averages the RR intervals of 30 seconds, calculates the RR average value, and then subtracts the RR average value from the HRV data after sampling the HRV, thereby obtaining a unified HRV curve. calculate.

  The storage unit 13 includes a non-volatile memory (internal memory), and is configured by, for example, a flash memory. The storage unit 13 has a program area and a data area, and a program for realizing the present embodiment is stored in the program area in accordance with processing procedures shown in FIGS.

  In the data area, a respiratory rhythm for guide is stored. Here, the breathing rhythm for guide is a breathing rhythm in which inspiration or exhalation is performed at regular intervals. A plurality of guide breathing rhythms may be stored in the storage unit 13 in advance. For example, by storing three types of guide respiratory rhythms of “normal”, “slow”, and “fast”, the respiratory rhythm can be selected according to the user.

  The display unit 14 includes a liquid crystal display or the like, and displays the screens shown in FIGS. On the display unit 14, as a guide for allowing the user to breathe at a constant breathing rhythm, a guide arrow 31 in which the direction of the arrow changes in accordance with the guide breathing rhythm, and the shape, pattern, color, and the like change. The guidance figure 32 to be displayed is displayed. The display unit 14 displays an animation for guiding the user to a breathing pattern that allows the user to maintain a high degree of relaxation.

  Specifically, the display unit 14 maintains a highly relaxed state with a breathing pattern within a range of 5 to 10 times per minute, particularly 6 breaths per minute, so that inspiration for 5 seconds, and Displays an animation of 6 breath patterns per minute with 5 seconds of exhalation. When the user breathes according to the animation displayed on the display unit 14, the user is guided to a highly relaxed state.

  In the present embodiment, an animation is displayed in accordance with the breathing pattern set by the user. For example, as shown in FIGS. 5A to 5F, the direction of the guide arrow 31 is downward at the timing of inhalation start, and is upward at the timing of expiration after the end of inspiration. The guidance graphic 32 is a simplified representation of the lungs, and gradually from the original color (for example, green) to the color (for example, blue) from the lower part of the guidance pattern 32 at the start of inspiration. And the guidance graphic 32 is displayed so that the color (blue) completely changes at the end of inspiration. On the other hand, after the end of inspiration, the original figure (green) gradually changes from the upper part of the guidance figure in accordance with the start of expiration, and the guidance figure 32 completely changes to the original color (green) at the end of expiration. Is displayed. Note that the shape, pattern, and the like of the guide graphic 32 may be changed in accordance with the timing of inspiration and expiration.

  The display unit 14 may display a heart rate 33, a timer 34 indicating the remaining time of the exercise period, and a bar graph 35 indicating the intensity of pulsation in which the user's heart rate is detected.

  The timer 34 may be configured to count down from a predetermined time required to calculate a result of a relaxed state score 40 described later. The timer 34 can extend a predetermined time. In this embodiment, since at least about 1 minute is required to calculate the result of the relaxed state score 40, the time that can be set in the timer 34 is 1 minute from the shortest time to 20 minutes from the maximum time.

  The display unit 14 may display the waveform 37 of the HRV curve. The HRV curve is an important indicator of physiological compliance and emotional flexibility. If the HRV curve is a waveform like a sine wave, the HRV is considered stable and the user is in a relaxed state. On the other hand, when the user feels stress, the HRV curve has an irregular waveform.

  Further, after the user removes the portable breathing guidance apparatus 10 from the finger F, the display unit 14 displays a relaxed state score 40 calculated by the evaluation unit 16 described later. In addition, the display unit 14 starts detecting the pulse signal from the user's finger F, and after a predetermined time has passed, the display unit 14 displays the relaxed state of the user as a percentage of the relaxed state of high, medium, and low, respectively. Is displayed by a pie chart 41.

  Various messages can be displayed on the display unit 14. For example, the display unit 14 displays a message requesting the user to perform breathing in accordance with the guide breathing rhythm.

  The control unit 15 includes a CPU and the like, and is a central processing unit that controls the overall operation of the portable respiratory guidance device 10 according to various programs in the storage unit 13. In addition to the heart rate detection unit 12, the control unit 15 has an evaluation unit 16 that evaluates the user's relaxed state based on the HRV curve calculated by the heart rate calculation unit 12.

  The evaluation unit 16 evaluates whether or not the user is in a relaxed state. The evaluation unit 16 evaluates the relaxed state every predetermined time, that is, evaluates the relaxed state calculated in units of time after the predetermined time has elapsed.

  In this embodiment, the evaluation unit 16 performs a known fast Fourier transform (FFT) on the unified HRV data in order to obtain a power spectrum distribution (PSD) curve from the HRV curve, and again Square the width and divide by the length of the rank to calculate the PSD curve. Here, the length of the selected HRV order is 64 seconds.

  The evaluation unit 16 analyzes the PSD curve calculated from the HRV curve and evaluates that the HRV curve is relatively stable when all of the evaluation conditions 1 to 3 described later are satisfied simultaneously. Specifically, the evaluation condition 1 is that the frequency of the peak value (Peak) of the PSD curve is between 0.04 and 0.4 Hz (corresponding to a respiration rate of 3 to 24 rpm). When the peak value (Peak) of the PSD curve is not between 0.04 and 0.4 Hz, the evaluation unit 16 determines that the evaluation condition 1 is not satisfied, and the user is in a low relaxed state, that is, a state where the user is not relaxed. It is evaluated that it is. On the other hand, when the peak value (Peak) of the PSD curve is between 0.04 and 0.4 Hz, the evaluation unit 16 determines that the evaluation condition 1 is satisfied.

  If the evaluation unit 16 determines that the evaluation condition 1 is satisfied, the evaluation unit 16 next determines whether or not the evaluation condition 2 is satisfied. Here, the evaluation condition 2 is that the PSD value of the PSD curve at 0 Hz is smaller than a certain value (there is no drift in the HRV curve). Here, the constant value is a value obtained by dividing the peak value (Peak) of the PSD curve by 4 in the present embodiment. When the PSD value of the PSD curve at 0 Hz is larger than a certain value, the evaluation unit 16 determines that the evaluation condition 2 is not satisfied, and evaluates that the user is in a low degree of relaxation. On the other hand, when the PSD value of the PSD curve at 0 Hz is smaller than a certain value, the evaluation unit 16 determines that the evaluation condition 2 is satisfied.

  When the evaluation unit 16 determines that the evaluation condition 2 is satisfied, the evaluation unit 16 next determines whether or not the evaluation condition 3 is satisfied. Here, the evaluation condition 3 is that a calculated ratio (r = Peak / (PSDsum-Peak), which will be described later, is larger than a predetermined threshold. Specifically, the evaluation unit 16 has 0.04 to 0.4 Hz. The sum of PSD curve values (PSDsum) is calculated, and the ratio of the PSD curve peak value (Peak) to all PSD (PSDsum-Peak) other than the peak value between 0.04 and 0.4 Hz (r = Peak / (PSDsum-Peak).

  In the present embodiment, two threshold values are set as the predetermined threshold values, and the two threshold values (Tm, Th) are set to Tm = 1.0 and Th = 2.0, respectively. As described above, when the calculated ratio (r = Peak / (PSDsum-Peak)) is smaller than 1.0, the evaluation unit 16 evaluates that the user is in a low relaxation state. On the other hand, when the calculated ratio (r = Peak / (PSDsum-Peak)) is larger than 2.0, the evaluation unit 16 evaluates that the user is in a highly relaxed state, that is, a state where the mind and body are sufficiently relaxed. . Further, when the calculated ratio (r = Peak / (PSDsum-Peak)) is larger than 1.0 and smaller than 2.0, the evaluation unit 16 is in a moderate relaxed state, that is, the mind and body are somewhat relaxed. It is evaluated that it is in a state.

  Furthermore, the evaluation unit 16 determines the user's relaxed state. That is, the evaluation unit 16 performs a statistical evaluation of the situation related to high, medium, and low corresponding to the evaluation determination of the low, medium, and high relaxation states, and the evaluation unit 16 performs the relaxation state shown in FIG. A score (Effort Index) 40 is calculated. The calculation of the relaxed state score 40 is 4 times the measured value (PerH) of the advanced relaxed state, 3 times the measured value of the moderately relaxed state (PerM), and 0 of the measured value (PerL) of the low relaxed state. The calculated value obtained by dividing the multiplied addition value by 4 is multiplied by 100. This calculation formula is Effot Index = 100 × (PerH × 4 + PerM × 3 + PerL × 0) / 4. Here, PerH + PerM + PerL = 1. In the present embodiment, the relaxed state score 40 is 100 when the proportion of the advanced relaxed state exceeds 70%. The relaxed state score 40 is displayed on the display unit 14 as motivation for achieving an advanced relaxed state.

  In addition, the evaluation unit 16 creates a pie chart 41 indicating the ratios 411, 412, and 413 of the relaxed states of high, medium, and low, respectively. The pie chart 41 is displayed on the display unit 14 and provides the user with information on the relaxed state of the user. Comparing the moderate relaxed state ratio 412 and the low relaxed state ratio 413, the higher the relaxed state ratio 411, the higher the relaxed state score 40.

  In addition, the control unit 15 may be provided with a respiration rate adjustment unit 17. After the user starts breathing in accordance with a preset guide breathing rhythm, and after a certain amount of time (about 25 seconds) has elapsed and the user's HRV has stabilized, the respiration rate adjustment unit 17 Adjusts the breathing rhythm for the guide corresponding to the breathing rate.

  For example, when the user's actual respiration rate exceeds 10 rpm, the respiration rate adjustment unit 17 is set to be equal to the respiration rate obtained by reducing the setting of the user's actual respiration rate by a predetermined value (for example, 2). The guide breathing rhythm is adjusted to guide the user's breathing rate to be in the range of 5 to 10 rpm. Further, every time a predetermined time elapses, the respiration rate adjustment unit 17 measures the actual respiration rate of the user and adjusts the respiration rate so that the respiration rate of the user falls within the range of 5 to 10 rpm. On the other hand, when the actual respiration rate of the user does not exceed 10 rpm, the respiration rate adjusting unit 17 adjusts the guide respiration rhythm so as to be equal to the actual respiration rate of the user.

  In the present embodiment, the respiration rate adjustment unit 17 calculates the respiration rate of the user when the user is in a moderate relaxed state or an advanced relaxed state. The user's respiration rate is set to 60 times the frequency (Fpeak) of the peak value of the PSD curve calculated by the evaluation unit 16 (Resp Rate = 60 × Fpeak).

  The selection unit 18 enables an arbitrary function menu to be selected from the menu function of the portable breathing guidance apparatus 10 when operated by the user. For example, when the respiration rate of the user does not match the pace of 6 times per minute, which is the guide respiration rhythm, the user may operate the selection unit 18 to change to another guide respiration rhythm. . That is, when the user feels that the guide breathing rhythm displayed on the display unit 14 is too slow or too fast, the user operates the selection unit 18 to change the guide breathing rhythm that allows the user to breathe more comfortably. A configuration may be selected. On the other hand, even if a user operates the selection part 18, it is good also as a structure which a user cannot select the breathing rhythm for guides arbitrarily.

  The selection unit 18 may be configured to turn on / off the portable respiratory guidance device 10 by a user operation. Further, by operating the selection unit 18, the display between the breathing guidance screen shown in FIG. 4 and the relaxed evaluation screen shown in FIG. 5 may be switched.

  The power source 19 can set an alkaline battery, for example, in the apparatus main body 30 as a drive source of the portable breathing guidance apparatus 10, and is electrically connected to the pulse detection unit 11, the display unit 14, the control unit 15, and the like. It is connected.

  The apparatus main body 20 is formed in a shape like a pulse oximeter, that is, an instrument attached to a user's fingertip to measure a user's blood pulse rate and oxygen content, and is provided with a display unit 14. The upper body 21 and the lower body 22 are configured. An opening 23 is provided between the upper main body 21 and the lower main body 22, and the user's finger F can be disposed in the opening 23 as shown in FIG. 3. The upper main body 21 and the lower main body 22 are rotatable about a rotation shaft (not shown).

  In the present embodiment, as shown in FIG. 3, when the portable respiratory guidance device 10 is mounted on the user's finger F, when the user sandwiches the one end 24 of the portable respiratory guidance device 10, the portable respiratory guidance device 10 is provided so as to be rotatable. The upper and lower main bodies 21 and 22 are rotated in directions away from each other, and the opening 23 is expanded. And if a user's finger F is arrange | positioned in the opening part 23 of the lower side main body 22, and the hand H is released from the one end part 23, a user's finger F will be clamped and the portable breathing guidance apparatus 10 will be a user's finger. It is worn on the finger F.

<Processing Procedure of Portable Breathing Guidance Device of This Embodiment>
Next, a processing procedure for evaluating the user's relaxed state by the portable respiratory guidance device 10 will be described with reference to flowcharts showing the processing procedure of the portable respiratory guidance device of the present embodiment shown in FIGS. As shown in FIG. 3, the user wears the portable breathing guidance device 10 on the finger F, and breathes in accordance with changes in the figure displayed on the display unit 14 of the portable breathing guidance device 10. The person who does it.

  First, the user wears the portable respiratory guidance device 10 on the user's finger F. In the present embodiment, as shown in FIG. 3, the user's hand H sandwiches one end 24 of the portable breathing guidance device 10, and the upper body 21 and the lower body 22 that are rotatably provided are separated from each other. And the opening 23 expands. And if a user arrange | positions a user's finger F in the opening part 23 of the lower side main body 22, and releases the hand H from the one end part 23, a user's finger F will be clamped and a portable respiration induction | guidance apparatus 10 is worn on the user's finger F.

  In addition, the display unit 14 displays a guide arrow 31 in which the direction of the arrow changes in accordance with the set guide breathing rhythm and a guide figure 32 in which the shape, pattern, color, or the like changes. When the user breathes in accordance with changes in the guidance arrow 31 and the guidance graphic 32 displayed on the display unit 14, the user is guided to breathing with a constant breathing rhythm. As shown in FIGS. 5A to 5F, in the present embodiment, the direction of the guide arrow 31 is downward at the start of inspiration, and is upward at the start of expiration after the end of inspiration. The guidance graphic 32 is a simplified representation of the lungs, and gradually from the original color (for example, green) to the color (for example, blue) from the lower part of the guidance pattern 32 at the start of inspiration. And the guidance graphic 32 is displayed so that the color (blue) completely changes at the end of inspiration. On the other hand, after the end of inspiration, the original figure (green) gradually changes from the upper part of the guidance figure in accordance with the start of expiration, and the guidance figure 32 completely changes to the original color (green) at the end of expiration. Is displayed.

  In step S <b> 101 shown in FIG. 7, when the portable respiratory guidance device 10 is worn on the user's finger F, the detection unit 11 starts detecting a pulse signal that is a detection signal from the user's finger F. In this embodiment, the detection unit 11 samples the pulse signal at 100 Hz to obtain the heart beat interval, and further samples the time interval of the heart beat at 4 Hz to identify the HRV. Therefore, by sampling the heart rate at 4 Hz, it is possible to identify the case where the user inhales and exhales air.

  In step S102, the heart rate calculator 12 calculates a time interval between two consecutive heart beats, that is, an RR interval, from the pulse signal detected in step S101. In step S103, the heart rate calculation unit 12 performs a centralization process (subtracts the average value) after sampling at an RR interval of 4 Hz. In step S104, the heart rate calculator 12 acquires HRV data. In the present embodiment, the heart rate calculator 12 averages the RR intervals of 30 seconds, calculates the RR average value, and then subtracts the RR average value from the HRV data after sampling the HRV, thereby integrating the HRV curve. Is calculated. This process removes the DC amount of HRV and improves the accuracy of the determination of the baseline drift.

  In step S105, the evaluation unit 16 determines whether or not a predetermined unit time (5 seconds in the present embodiment) has elapsed. If the predetermined unit time has elapsed, the evaluation unit 16 proceeds to step S106 and proceeds to the predetermined unit time. If not, steps S101 to S104 are repeated.

  In step S106, the evaluation unit 16 performs FFT conversion on the HRV data unified in step S104. In step S107, the evaluation unit 16 squares the width of each point in the order and divides by the length of the order. In step S108, the evaluation unit 16 calculates a PSD curve.

  In step S109, the evaluation unit 16 analyzes the PSD curve calculated in step S108 and searches for the peak value (Peak) of the PSD curve.

  In step S110 shown in FIG. 8, when the frequency (Fpeak) corresponding to Peak searched in step S109 is within the range of 0.04 Hz to 0.4 Hz, the evaluation unit 16 proceeds to step S111. If it is out of the range of .04 Hz to 0.4 Hz, the process proceeds to step S122. Note that the processing in step S110 is set as evaluation condition 1.

  In step S111, the evaluation unit 16 calculates the width of the PSD. If 0 Hz <Peak / 4, the evaluation unit 16 proceeds to step S112, and otherwise proceeds to step S122. Note that the processing in step S111 is set as evaluation condition 2.

  In step S112, the evaluation unit 16 calculates Peak within the frequency range of (Fpeak−0.02 Hz) to (Fpeak + 0.02 Hz). In step S113, the evaluation unit 16 calculates PSD (PSDsum) within a frequency range of 0.04 Hz to 0.4 Hz. In step S114, the evaluation unit 16 calculates r = Peak / (PSDsum−Peak).

  In step S115, the evaluation unit 16 sets Tm = 1.0 and Th = 2.0 as the setting threshold values. In step S116, the evaluation unit 16 determines whether r> Tm. If the evaluation unit 16 determines that r> Tm, the process proceeds to step S117. In addition, it is good also as a structure which progresses to step S118 which performs the adjustment process of a respiration rate. On the other hand, when the evaluation unit 16 determines that r ≦ Tm, the process proceeds to step S122. In step S117, the evaluation unit 16 determines whether r> Th. When the evaluation unit 16 determines that r> Th, the process proceeds to step S120. On the other hand, when the evaluation unit 16 determines that r ≦ Th, the process proceeds to step S121. Note that the processing in steps S112 to S117 described above is set as evaluation condition 3.

  In step S118, the evaluation unit 16 evaluates that the evaluation conditions 1 to 3 are satisfied from the above processing result, and evaluates that the user is in a highly relaxed state.

  In step S119, the evaluation unit 16 evaluates that the user is in a moderate relaxed state by satisfying the evaluation conditions 1 and 2 but not satisfying all the evaluation conditions 3 from the above processing results.

  In step S120, the respiration rate adjusting unit 17 calculates a respiration rate based on the processing result of step S116. In the present embodiment, the respiration rate adjustment unit 17 calculates the respiration rate of the user by respiration rate (Resp Rate) = 60 × Fpeak. In other words, the respiration rate of the user is set to 60 times the frequency (Fpeak) of the peak value of the PSD curve calculated by the evaluation unit 16.

  In step S121, the respiration rate adjusting unit 17 adjusts a respiration rate suitable for the user from the respiration rate calculated in step S120. Specifically, when the user's actual respiration rate exceeds 10 rpm, the respiration rate adjustment unit 17 reduces the setting of the user's actual respiration rate to a respiration rate that is reduced by a predetermined value (for example, 2). The guide breathing rhythm is adjusted to be equal, and the user's breathing rate is guided to be within the range of 5 to 10 rpm. The respiration rate adjustment unit 17 measures the actual respiration rate of the user every time a predetermined time elapses and guides the respiration rate of the user to be within a range of 5 to 10 rpm. On the other hand, when the actual respiration rate of the user does not exceed 10 rpm, the respiration rate adjusting unit 17 adjusts the guide respiration rhythm so as to be equal to the actual respiration rate of the user. In this embodiment, there are “slow” and “fast” in addition to “normal”, and the user can be guided to a more advanced relaxed state by adjusting according to the respiration rate of the user. .

  In step S <b> 122, the evaluation unit 16 evaluates that the evaluation conditions 1 to 3 are not satisfied and that the evaluation condition 16 is a low-level relaxed state or a non-relaxed state.

  In steps S118, S119, and S122, the evaluation unit 16 calculates the slack state score 40 shown in FIG. The calculated slack state score 40 is displayed on the display unit 14 and serves as a motivation for the user to achieve an advanced relaxed state. The relaxed state score 40 is calculated as follows. 4 times the high relaxed state measurement (PerH), 3 times the moderate relaxed state measurement (PerM), and 0 times the low relaxed state measurement (PerL). The relaxed state score 40 is calculated by multiplying the calculated value obtained by doing this by 100. This calculation formula is Effot Index = 100 × (PerH × 4 + PerM × 3 + PerL × 0) / 4, and PerH + PerM + PerL = 1. In the present embodiment, the relaxed state score 40 is 100 when the proportion of the advanced relaxed state exceeds 70%.

  Furthermore, in steps S118, S119, and S122, the evaluation unit 16 creates a pie chart 41 shown in FIG. The created pie chart 41 is displayed on the display unit 14 so that the user can easily grasp the relaxed state of the user.

<Effect of this embodiment>
The portable respiratory guidance device 10 of this embodiment uses a respiratory guidance technique and a biological feedback technique to analyze a user's pulse signal with a non-invasive optical sensor, and to obtain heart rate variability information obtained from the analysis result. By analyzing the coherence between the respiratory rate, the user can be guided to a relaxed state. That is, the steady state of respiration and heart rate fluctuation trends reflects the state of interaction between the sympathetic and parasympathetic nervous systems in the body. When heart rate variability is synchronized with the rhythm of breathing regularly, it is thought that the nervous system leads to harmony between the body and the mind. This means that the physical body becomes more effective. Emotions are stable, spirits are in a very physiological relaxed state, peaceful and sensitive.

  Since the portable breathing guidance apparatus 10 of this embodiment evaluates the user's relaxed state in detail and displays the evaluation result on the display unit 14, the user can easily confirm the user's own relaxed state. Is possible.

  The portable breathing guidance device 10 of this embodiment calculates a user's breathing rate and adjusts the guide breathing rhythm to guide the user to a highly relaxed state without complicated operations. Is done.

  The portable breathing guidance device 10 of the present embodiment guides the breathing rhythm for the guide using an animation such as a graphic change, thereby assisting the user's mental concentration, controlling emotions, calming the autonomic nervous system, Improve the level of mental and physical health and achieve a high level of relaxation throughout the body.

  The portable breathing guidance device 10 of the present embodiment is of a size that can be worn on the user's fingertips, so that it is not only excellent in portability, but also easy to operate, so it can be used at home or in individuals. Can be used.

  The portable breathing guidance device 10 of the present embodiment promotes slow breathing to a user whose heart rate variability is irregular and breathing is disturbed due to stress emotions including anger, disappointment, and anxiety, In order for the user to enter a relaxed state with a harmonious body and spirit, the user can concentrate the consciousness and guide the user to a sufficiently relaxed state. The user is guided to a relaxed state by using the portable breathing guidance apparatus 10 of the present embodiment, and can obtain the same effect as meditation or zazen, thereby relaxing and refreshing the user's mind and body. Can help reach mood.

[Modifications of Embodiment, etc.]
In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification is specified by changing these partial configurations to other configurations disclosed in the present specification within the applicable range, or these Including those specified by adding other configurations disclosed in this specification, or those obtained by deleting these partial configurations to the extent that partial effects can be obtained, These modifications are also included.

  In the present embodiment, the user is configured to guide the breathing rhythm by the animation displayed on the display unit 14. However, the portable breathing guidance apparatus 10 is provided with a speaker unit, and the voice generated from the speaker unit is used. Alternatively, the respiratory rhythm may be guided. In addition, it is good also as a structure which performs the guide of the respiratory rhythm by both animation and an audio | voice, and it is good also as a structure which can select the guide by an animation and / or audio | voice by the selection part 18.

DESCRIPTION OF SYMBOLS 10 ... Portable breathing induction apparatus 11 ... Pulse detection part 12 ... Heart rate calculation part 13 ... Memory | storage part 14 ... Display part 15 ... Control part 16 ... Evaluation part 17 ... Respiration rate adjustment part 18 ... Selection part 19 ... Power supply 20 ... Main part of apparatus DESCRIPTION OF SYMBOLS 21 ... Upper side body 22 ... Lower side body 23 ... Opening part 24 ... One end 31 ... Guidance arrow 32 ... Guidance figure 33 ... Heart rate 34 ... Timer 35 ... Bar graph 36 ... Waveform of HRV curve 40 ... Relaxation state score 41 ... Circle Graph

Claims (5)

A detection unit for detecting a detection signal from a user's finger;
A heart rate calculator that calculates a heart rate variability curve from the detection signal detected by the detector;
A storage unit for storing a breathing rhythm for the guide;
A display unit for displaying the heart rate variability curve calculated by the heart rate calculation unit and the guide respiratory rhythm stored in the storage unit;
An apparatus body comprising:
The apparatus main body includes an upper main body and a lower main body that are pivotally supported, and the user's finger can be disposed between the upper main body and the lower main body. Portable breathing guidance device.   An evaluation unit that evaluates the relaxed state of the user from a ratio of a low relaxed state, a moderate relaxed state, and a high relaxed state based on the heart rate variability curve calculated by the heart rate calculating unit; The portable respiratory induction device according to claim 1, wherein   The portable breathing guidance apparatus according to claim 2, wherein the display unit displays a relaxed state of the user evaluated by the evaluation unit.   A respiration rate adjustment unit that calculates the respiration rate of the user from the heart rate variability of the user and adjusts the respiration rhythm for the guide to a respiration rhythm corresponding to the respiration rate of the user. Item 4. The portable respiratory induction device according to any one of Items 1 to 3.   The portable respiratory guidance device according to claim 1, wherein the display unit displays the guide respiratory rhythm by changing a predetermined figure.

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