JP2017198577A - Biological information measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information measurement device that can be mounted on a body and can certainly and continuously measure a perspiration speed and specific component concentration in sweat without being affected by a perspiration state.SOLUTION: A biological information measurement device 1 includes: a sampling unit 10 for sampling sweat 8; a flow channel 20 in which a starting end 20a communicates with the sampling unit 10 to cause the sweat 8 sampled by the sampling unit 10 to circulate, and a terminal end 20b is opened to the atmosphere; a light source unit 30 for irradiating the flow channel 20 with light having a wavelength absorbed into moisture in the sweat; a light receiving unit 40 for receiving the light having passed through the flow channel 20; and a perspiration speed processing unit 71 for detecting an intensity change of the light received by the light receiving unit 40 every prescribed time, and calculating a perspiration speed on the basis of an amount of the sweat 8 having circulated correspondingly to the prescribed time.SELECTED DRAWING: Figure 2B

Description

  The present invention relates to a biological information measuring apparatus capable of acquiring information derived from sweat.

  Normally, sweating changes with the pulse during exercise. Although the sweating state is affected by the exercise environment and the condition before exercise, it is also affected by the exercise state. Accordingly, if factors other than exercise can be corrected, sweat information can be an index correlated with exercise. However, since the amount of perspiration in a living body is very small, a technique for collecting a small amount of sweat is required.

  As a method of collecting a small amount of sweat, as shown in Non-Patent Document 1, there is a method using MACRODUCT, which is a product that collects sweat inside a spiral thin tube at a sweating position. By extracting and analyzing the collected sweat sample, the component concentration in the sweat can be measured.

  As an apparatus for measuring the sweating rate, Patent Document 1 proposes a device that introduces a gas into the measurement unit and calculates the sweating rate from the humidity difference of the gas. Patent Document 2 proposes a method in which a plurality of sensors are provided in a flow path, and a sweat rate is calculated from a difference in sweat arrival speeds to the sensors.

  Patent Document 3 proposes an apparatus that uses a plurality of flow paths and suction mechanisms to calculate the perspiration rate from the difference in the sweat arrival time to the sensor. By providing the suction mechanism, the perspiration rate can be calculated intermittently even with a minimum sensor.

Japanese Examined Patent Publication No. 6-121 JP 2009-136526 A JP 2010-207335 A

Web site of WESCOR “Biomedical Product Division: Sweat Testing / Cystic Fibrosis” Internet <URL: http: //www.wescor.com/biomedical/cysticfibrosis/index.html#>

As described in Patent Document 1, even if the change in the component concentration in blood is constant, the component concentration in sweat tends to increase when the perspiration rate is slow, and the component concentration in sweat tends to decrease when the perspiration rate is high. There is. Therefore, as an index that correlates with changes in blood component concentration during exercise, it is expressed by the sweat component secretion rate and secretion amount expressed by the product of the sweat component concentration and the sweat rate rather than the sweat component concentration. Is preferred. However, the current sweat rate measuring device has the following problems.
In the case of using the device of Non-Patent Document 1, a dye that reacts with sweat and colors is provided, and it is possible to visually check how much sweat has entered the flow path. Therefore, for the purpose of grasping the sweat rate over time, there is a problem that the accuracy of the measured sweat rate is inferior.
It is known that the perspiration rate during exercise load is greatly affected during exercise due to the influence of exercise intensity, exercise environment, time from the start of exercise, and the like. For this reason, measuring changes in sweat rate during exercise load is very important for grasping biological behavior during exercise. In this case, Non-Patent Document 1 has a problem that accurate measurement of sweat rate and continuous measurement of sweat rate cannot be performed.

In order to measure the perspiration rate during exercise load without imposing a burden on the subject, it is desirable that the measuring device is in the form of a wearable device such as a wristwatch type, a wristband type, or a belt type. However, introducing the gas suction mechanism of Patent Document 1 into a wearable device has a problem in terms of power consumption. In addition, when used during exercise in which the sweating rate changes greatly, there are problems in terms of sensitivity and responsiveness in a region where the amount of change in humidity is large and the sweating rate is high.
In addition, in the apparatus of Patent Document 2, the sweat rate reaches the sensor from the start of exercise and the sweat rate while the sensor is full can be measured. However, the sweat rate has changed since the sensor was filled with sweat. However, there is a problem that the sweat rate cannot be measured in principle.
In addition, the apparatus of Patent Document 3 has problems in terms of size, wearability, and power consumption for mounting the apparatus on the body when information is acquired in real time by being applied to measurement during exercise.
Accordingly, there has been a demand for a biological information measuring device that can be worn on the body and can reliably and continuously measure the sweating rate and the specific component concentration in the sweat without being affected by the sweating state.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] The biological information measuring apparatus according to this application example includes a collection unit that collects sweat, and a start end that is in communication with the collection unit and flows as droplets of the sweat collected by the collection unit. An open channel, a light source that irradiates the channel with light of a wavelength absorbed by moisture in sweat, a light receiver that receives light transmitted through the channel, and a change in the intensity of light received by the light receiver And a perspiration rate processing unit that calculates a perspiration rate based on the amount of sweat that has flowed corresponding to the predetermined time.

  The biological information measuring apparatus according to this application example includes a collection unit, a flow path, a light source unit, a light receiving unit, and a sweating rate processing unit. The sweat collected in the collection part flows through the flow path from the start end to the end. Then, light having a wavelength that is absorbed by moisture in sweat is irradiated to the flow path by the light source unit, and light transmitted through the flow path is received by the light receiving unit. Then, the perspiration rate processing unit detects a change in the intensity of the light received by the light receiving unit every predetermined time, and calculates the perspiration rate based on the amount of sweat flowing corresponding to the predetermined time. Thus, by using light having a wavelength that is absorbed by moisture in sweat, it is possible to reliably detect a change in light intensity, and thus it is possible to reliably determine the presence or absence of sweat. In addition, since the change in light intensity is detected every predetermined time and the perspiration rate is calculated based on the amount of sweat that flows during the predetermined time, it is not affected by the perspiration state even during exercise when the perspiration rate changes greatly. It becomes possible to calculate the perspiration rate reliably. In addition, since the perspiration rate is calculated every predetermined time, it is possible to realize a biological information measuring device capable of measuring the perspiration rate accurately and continuously.

  Application Example 2 In the biological information measuring apparatus according to the application example described above, the light source unit includes light source elements that are installed at predetermined intervals along the flow path, and the light receiving unit detects light of each light source element. The sweat rate processing unit has an element, and detects a sweat position by detecting a light intensity change at a predetermined interval every predetermined time, and a sweat position determination unit from the position where the previous sweat was detected. A sweat rate calculation unit that calculates a sweat rate based on the amount of sweat corresponding to the flow path length to the position where sweat is detected and the elapsed time from the previous position until the next position is detected. Is preferred.

  According to the biological information measuring apparatus according to this application example, the light source unit and the light receiving unit have light source elements and light receiving elements that are installed at predetermined intervals along the flow path. The sweat rate processing unit has a sweat position determination unit and a sweat rate calculation unit. Then, the sweat position determination unit determines the position of the sweat by determining the presence or absence of sweat at the position of the predetermined interval based on the light intensity change at the position of the predetermined interval every predetermined time. Then, the sweating rate calculation unit calculates the amount of sweat corresponding to the flow path length from the position where the previous sweat was detected to the position where the next sweat was detected until the next position was detected from the previous position. By dividing by time, the perspiration rate can be reliably calculated. In this case, since the previous position and the current position are set at predetermined intervals, the flow path length can be calculated. Then, the amount of sweat is calculated by multiplying the channel length by a predetermined channel cross section. Further, since the detection is performed at predetermined time intervals, the time required until the next position is detected from the previous position is calculated. Thus, the sweat rate can be reliably calculated by dividing the amount of sweat that has moved by the elapsed time. Therefore, it is possible to realize a biological information measuring device capable of continuously measuring the sweating rate by determining the sweating position based on the presence or absence of sweating and calculating the sweating rate every predetermined time.

  Application Example 3 In the biological information measuring apparatus described in the application example, it is preferable that the light applied to the flow path is near infrared light.

  According to the biological information measuring apparatus according to this application example, the intensity change is achieved by using near infrared light that has high transmittance among infrared light and has a large amount of infrared light absorbed by moisture in sweat. It is possible to increase (make the output of the light receiving element noticeable). Therefore, a change in intensity can be detected easily and reliably. Furthermore, unlike other infrared light, near infrared light has no heating action, so there is no need to consider the influence of heat on sweat components, and the convenience of the biological information measuring device is improved.

  Application Example 4 In the biological information measuring apparatus described in the application example, it is preferable that the flow path includes a plurality of bent portions.

  According to the biological information measuring apparatus according to this application example, the flow path includes a plurality of bent portions, so that the flow path length can be increased and the flow path can be configured compactly. Thereby, it becomes possible to measure the perspiration rate for a long time, and the biological information measuring device can be miniaturized.

  Application Example 5 In the biological information measuring apparatus according to the application example described above, a component concentration detection unit that is installed in a flow channel branched from the flow channel and detects information for calculating the concentration of a specific component contained in sweat; And a component concentration processing unit that calculates the concentration based on information detected by the component concentration detection unit.

  According to the biological information measuring apparatus according to this application example, the component concentration detection unit is installed in a new flow path branched from the flow path. Information for calculating the concentration is detected. Further, the concentration of the specific component contained in the sweat can be calculated by the component concentration processing unit based on the information detected by the component concentration detection unit.

  Application Example 6 It is preferable that the biological information measuring apparatus according to the application example further includes a secretion rate processing unit that calculates the secretion rate of the specific component based on the perspiration rate and the concentration of the specific component.

  According to the biological information measuring apparatus according to this application example, the secretion rate processing unit can know the secretion rate of the specific component based on the sweat rate and the concentration of the specific component. Thereby, for example, the amount of secretion of a specific component can be used as a measure of exercise intensity, and exercise intensity can be adjusted appropriately. In addition, since the secretion rate of lactic acid in blood can be estimated by knowing the secretion rate of lactic acid secreted into sweat, the convenience of the biological information measuring device is improved.

  Application Example 7 In the biological information measuring apparatus according to the application example described above, the specific component is preferably lactic acid.

  According to the biological information measuring apparatus according to this application example, it is possible to know the secretion rate (secretion amount) of lactic acid as a specific component. Thereby, for example, it becomes possible to use it as a guideline for determining exercise intensity by comparing the obtained lactate secretion rate and blood lactate concentration. In particular, in endurance competition (long-distance running, bicycle, cross-country skiing, etc.), it is possible to provide information useful for effectively enhancing endurance.

  Application Example 8 In the biological information measuring apparatus described in the application example, it is preferable that the specific component contains sodium.

  According to the biological information measuring apparatus according to this application example, it is possible to know the secretion rate (secretion amount) of sodium as a specific component. For example, by knowing the amount of sodium secreted in sweat during exercise, it is possible to know the lack of salt concentration in the blood, so it is possible to maintain proper exercise intensity by encouraging the supply of salt. .

  Application Example 9 In the biological information measuring device described in the above application example, it is preferable that the biological information measuring device includes a fixing unit that fixes the sampling unit to the skin surface.

  According to the biological information measuring apparatus according to this application example, since the collection unit is fixed to the skin surface by the fixing unit, it is possible to stably collect sweat.

The front view of the biological information measuring device concerning a 1st embodiment. The rear view of a biological information measuring device. The side view of a biological information measuring device. The top view which shows the structure of the principal part of a biological information measuring device. Sectional drawing which shows the structure of the principal part of a biological information measuring device. The block diagram which shows the schematic circuit structure of a biological information measuring device. The flowchart which shows the initial stage operation | movement of a biological information measuring device. The flowchart which shows the normal operation | movement of a biological information measuring device. The figure which shows the relationship between the flow of the sweat in a flow path, and the set position. The figure which shows the relationship between the flow of the sweat in a flow path, and the set position. The figure which shows the relationship between the flow of the sweat in a flow path, and the set position. The figure which shows the relationship between the flow of the sweat in a flow path, and the set position. The flowchart which shows the normal operation | movement of the biological information measuring device which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is illustrated differently from the actual scale for convenience of explanation.

[First Embodiment]
FIG. 1A is a front view of the biological information measuring apparatus 1 according to the present embodiment. FIG. 1B is a rear view of the biological information measuring apparatus 1. FIG. 1C is a side view of the biological information measuring apparatus 1.
The biological information measuring apparatus 1 includes a band 2 and various information obtained from sweat (such as a sweat rate, a concentration of a specific component (lactic acid), a secretion rate of a specific component (lactic acid), etc., which will be described later). A display unit 4 including a display panel for displaying characters, numbers, graphs, icons, and the like is provided.

  An operation unit 5 such as an operation button for operating the biological information measuring apparatus 1 is installed on the side surface of the case 3. The biological information measuring apparatus 1 operates using, for example, a built-in secondary battery as a power source. On the side surface of the case 3, a charging terminal 6 connected to an external charger and charging a secondary battery is installed.

  On the back surface of the case 3, a collecting unit 10 that collects the user's sweat is installed. The collection unit 10 is fixed in contact with the skin surface S of the wrist W of the user by the band 2 as a fixing unit, and introduces sweat that perspires into the collection unit 10. Also, a sweat discharge mechanism 60 is installed on the side surface of the case 3, and sweat introduced from the collection unit 10 is discharged from the biological information measuring device 1 after flowing through a flow path 20 (20 </ b> A) described later.

  FIG. 2A is a plan view illustrating a configuration of a main part of the biological information measuring apparatus 1. FIG. 2B is a cross-sectional view illustrating a configuration of a main part of the biological information measuring apparatus 1.

  As shown in FIGS. 2A and 2B, the biological information measuring apparatus 1 includes a collection unit 10, a flow path 20, a light source unit 30, a light receiving unit 40, a component concentration detection unit 50, a sweat discharge mechanism unit 60, and the like. . The collection unit 10 is configured in a substantially conical shape, and comes into contact with the skin surface S of the user when the biological information measuring device 1 is worn on the wrist W of the user. Sweat vapor 9 surrounded by the collection unit 10 and sweating on the skin surface S accumulates inside the collection unit 10.

  A top end 20a of a channel 20 formed in a tubular shape is connected to the top of the collection unit 10. The flow path 20 is branched in two directions near the start end 20a. One branched flow path 20 </ b> A is formed with a plurality of bent portions 21, and is connected to the sweat discharging mechanism portion 60 at the end 20 b. The channel 20A that is bent is formed to be substantially parallel to the case 3 on the back side, in other words, to be substantially parallel to the skin surface S when the biological information measuring device 1 is attached to the skin surface S. The other branched flow path 20B is connected to the component concentration detector 50, and is connected to the sweat discharge mechanism 60 at the end 20b. The sweat vapor 9 collected in the collection unit 10 is formed into droplets 8 by the capillary condensation phenomenon near the start end 20a and becomes sweat 8, and the end 20b and the components are formed in the flow path 20 by the pressure of the sweat vapor 9 sweating and the capillary phenomenon. It flows toward the concentration detector 50.

  The light source unit 30 is installed relative to the flow path 20A. The light source unit 30 is composed of a line light source and is installed in a form crossing the bending flow path 20A. In the line light source, light source elements 31 are respectively installed at portions facing the flow path 20A. In the present embodiment, the light source element 31 emits near infrared light. Specifically, in the present embodiment, the light source element 31 uses an infrared light LED (Light Emitting Diode) having a peak emission wavelength of 1450 nm. Therefore, the light source unit 30 (light source element 31) emits near-infrared light having an emission wavelength peak at 1450 nm toward the flow path 20A.

  The near-infrared light having a wavelength of 1450 nm or 1940 nm is absorbed in water more than near-infrared light having other wavelengths, and the output of the light receiving element 41 described later appears significantly. Can be obtained. In the present embodiment, an infrared LED having an emission wavelength peak at 1450 nm is used, but an infrared LED having an emission wavelength peak at 1940 nm may be used.

  As described above, when the sweat 8 is irradiated with infrared light having an emission wavelength peak at 1450 nm, the water contained in the sweat 8 absorbs infrared light having a wavelength of 1450 nm and passes through the sweat 8. Decreases in intensity compared to the irradiated infrared light. That is, the intensity of infrared light does not decrease when the sweat 8 is not in the flow path 20, and the intensity of infrared light decreases when the sweat 8 is in the flow path 20.

  The light receiving unit 40 is installed across the flow path 20 </ b> A relative to the light source unit 30. The light receiving unit 40 is composed of a line sensor, and is installed in a form that crosses the bending flow path 20A. The line sensor is provided with a light receiving element 41 at a portion facing the flow path 20A (facing the light source element 31), and detects each light of the light source element 31. In the present embodiment, the light receiving element 41 uses a photodiode having high sensitivity at a wavelength near 1450 nm. Therefore, the light receiving unit 40 (light receiving element 41) receives the near infrared light emitted from the light source unit 30 (light source element 31) and transmitted through the flow path 20A with high sensitivity.

  In the present embodiment, five light source elements 31 are installed in one line light source constituting the light source unit 30. In the present embodiment, a total of five line light sources are installed. In the present embodiment, five light receiving elements 41 are installed in one line sensor constituting the light receiving unit 40. In the present embodiment, a total of five line sensors are installed.

  The component concentration detector 50 is connected to the branched flow path 20B. The component concentration detection unit 50 detects information for calculating the concentration of a specific component contained in the sweat 8. In the component concentration detector 50 of the present embodiment, a stimulus responsive gel 51 is installed inside. In this embodiment, the stimulus-responsive gel 51 detects the concentration of lactic acid as a specific component in sweat.

  The stimulus responsive gel 51 is a gel containing a drug that responds to a specific component contained in the sweat 8. Although the constituent material of the stimulus-responsive gel 51 is not particularly limited, in the present embodiment, for example, the stimuli-responsive gel 51 is composed of a polymer material having a cross-linked structure and a solvent. It has become a responding drug.

  The stimulus-responsive gel 51 has a polymer chain. This polymer chain contains many boronic acid groups. When lactic acid does not react with the stimulus-responsive gel 51, the boronic acid groups are bonded to each other and the polymer chains are close to each other. Thereby, the stimulus-responsive gel 51 is in a contracted state. When a sweat component containing lactic acid is present around the stimulus-responsive gel 51, the boronic acid group and lactic acid are bonded to each other, so that the polymer chain is dissociated, so that the volume of the stimulus-responsive gel 51 expands. . The conductivity changes as the volume expands. For this reason, by measuring the conductivity of the stimulus-responsive gel 51, the amount of the specific component (lactic acid) in sweat can be easily measured as a change in conductivity.

  The sweat discharge mechanism section 60 has a function of exhausting the sweat 8 that has flowed through the flow path 20A and the sweat 8 that has passed through the component concentration detection section 50 from the side surface of the case 3 to the outside. The sweat discharge mechanism 60 is provided with a porous member 61 inside, and evaporates the sweat 8 by increasing the surface area.

FIG. 3 is a block diagram showing a schematic circuit configuration of the biological information measuring apparatus 1.
As shown in FIG. 3, the biological information measuring apparatus 1 includes a control unit 70 (so-called CPU (Central Processing Unit)) that performs overall control of the entire operation of the biological information measuring apparatus 1 and a storage unit 80 that stores various types of information. ing. In addition, the biological information measuring apparatus 1 includes a light source driving unit 93, a received light amount measuring unit 94, an A / D conversion unit 95, a conductivity measuring unit 96, an A / D conversion unit 97, a display unit 4, and an operation unit 5. ing. The light source drive unit 93, the received light amount measurement unit 94, the A / D conversion unit 95, the conductivity measurement unit 96, the A / D conversion unit 97, the display unit 4, and the operation unit 5 are connected to the input / output interface 92 and the data bus 91. Via the control unit 70.

  The light source driving unit 93 drives the light source element 31 by applying a voltage to the light source unit 30 (light source element 31) every predetermined time. The light source driver 93 applies a voltage to all the light source elements 31. The light source element 31 emits near-infrared light toward the flow path 20 every predetermined time by the operation of the light source driving unit 93. In the present embodiment, the predetermined time is measured by a timer (not shown), and the predetermined time (second predetermined time described later) is 3 minutes. However, the predetermined time is not limited to 3 minutes and can be set as appropriate.

  The received light amount measuring unit 94 causes the light receiving unit 40 (light receiving element 41) to receive near infrared light transmitted through the flow path 20. Then, the A / D conversion unit 95 converts the light amount (current) received by the light receiving element 41 into a voltage by an analog amplification unit (not shown), converts the amplified signal into a digital signal, and outputs the digital signal.

  In the storage unit 80, a storage area for storing a program 81, a light quantity correlation table 82, a sweat amount correlation table 83, and the like is set. The program 81 describes a procedure for controlling the operation of the biological information measuring apparatus 1.

  The light quantity correlation table 82 stores, as a reference intensity (light quantity), the intensity of near infrared light received by the light receiving element 41 when near infrared light is transmitted without sweat 8 in the flow path 20. doing. Therefore, the presence or absence of sweat 8 in the flow path 20 is determined based on whether or not the detected intensity of near-infrared light has a change (intensity change) compared to the reference intensity.

  The sweat amount correlation table 83 stores sweat amount data for each predetermined section set in the flow path 20. Therefore, when the position of the sweat 8 is determined by determining the presence or absence of the sweat 8 at a position at a predetermined interval, the amount of sweat between this position and the previously determined position can be calculated.

  In addition to the conductivity correlation table 84 described later, a storage area that functions as a work area for the control unit 70, a temporary file, and other various storage areas are set in the storage unit 80.

  The control unit 70 performs control to calculate the perspiration rate by executing the program 81 stored in the storage unit 80. Specifically, the control unit 70 includes a sweating rate processing unit 71 as a processing unit. The sweating rate processing unit 71 includes a sweat position determining unit 71A and a sweating rate calculating unit 71B.

  The sweat position determination unit 71A determines the presence / absence of sweat 8 at predetermined intervals in the flow path 20 based on the light amount correlation table 82 and the detected light amount, and the sweat 8 when it is determined that the sweat 8 is present. Judge the position of.

The method of determining the presence or absence of sweat 8 by the sweat position determination unit 71A is as follows.
When the detected light intensity is small (the intensity decreases) compared to the reference intensity (light intensity) stored in the light intensity correlation table 82, it is determined that there is sweat 8 in the flow path 20 at the detected position. . If the detected light intensity is the same (the intensity does not change) compared to the reference intensity (light intensity), it is determined that there is no sweat 8 in the flow path 20 at the detected position.

The method of determining the position of the sweat 8 by the sweat position determining unit 71A is as follows.
Since the detection of the amount of light is performed at predetermined intervals set in the flow path 20 (in other words, at each position where the light source element 31 is installed), the positions at the predetermined intervals at which the sweat 8 is determined to be present are determined. Judge as position. If there are a plurality of positions determined to be present, the position on the most downstream side is determined as the position of the sweat 8.

  In addition, it is determined that there is sweat 8 at the position of the predetermined interval of the flow path 20, and the position that is the most downstream side is hereinafter referred to as “position of the sweat 8” or “position corresponding to the tip of the sweat 8. "And will be described as appropriate.

  The sweating rate calculation unit 71B includes the sweat amount correlation table 83, the position of the sweat 8 (the position of the previous sweat 8 and the position of the current sweat 8), and the elapsed time (the position of the current sweat 8 from the position of the previous sweat 8). From the time until the position is detected, the perspiration rate is calculated. Specifically, the sweat amount from the position of the sweat 8 detected last time to the position of the next detected sweat 8 is calculated from the sweat amount correlation table 83. When the sweat amount correlation table 83 is not used, the flow path length from the position of the previously detected sweat 8 to the position of the next detected sweat 8 is obtained and multiplied by a predetermined flow path cross-sectional area. Thus, the amount of sweat can be calculated. Further, an elapsed time from the previous sweat 8 position to the detection of the next sweat 8 position is obtained. Then, the perspiration rate is calculated by dividing the calculated sweat amount by the elapsed time.

  Next, the conductivity measuring unit 96 detects a current flowing between the electrodes 52 by applying a voltage to the pair of electrodes 52 installed on the stimulus-responsive gel 51 constituting the component concentration detecting unit 50. The voltage value output from the conductivity measuring unit 96 to the electrode 52 is controlled by the control unit 70. The conductivity measuring unit 96 operates in synchronization with the light source driving unit 93 for 3 minutes as a predetermined time.

  The stimulus-responsive gel 51 has a characteristic that the conductivity changes according to the concentration of lactic acid contained in the stimulus-responsive gel 51. Accordingly, the conductivity measuring unit 96 detects the conductivity corresponding to the lactic acid concentration by detecting the current flowing through the stimulus-responsive gel 51 or the resistance value. The A / D converter 97 converts the conductivity of the stimulus-responsive gel 51 detected by the conductivity measuring unit 96 into a digital signal and outputs the digital signal.

  In the storage unit 80, a storage area for storing the program 81, the conductivity correlation table 84, and the like is set. The program 81 describes a procedure for controlling the operation of the biological information measuring apparatus 1. The conductivity correlation table 84 stores data indicating the relationship between the conductivity of the stimulus-responsive gel 51 and the lactic acid concentration.

  The control unit 70 performs control for measuring the lactic acid concentration by executing the program 81 stored in the storage unit 80. Specifically, the control unit 70 includes a component concentration processing unit 72 as a processing unit. The component concentration processing unit 72 calculates the lactic acid concentration based on the conductivity correlation table 84 and the conductivity input from the A / D conversion unit 97.

  The control unit 70 further includes a secretion rate processing unit 73. The secretion rate processing unit 73 calculates the secretion rate (lactic acid amount) of lactic acid by multiplying the sweating rate calculated by the sweating rate processing unit 71 and the lactic acid concentration calculated by the component concentration processing unit 72.

  In addition to the above, the control unit 70 displays the sweating rate calculated by the sweating rate processing unit 71, the lactic acid concentration calculated by the component concentration processing unit 72, the secretion rate of lactic acid calculated by the secretion rate processing unit 73, and the like. Control to output to the unit 4 is performed. Further, the control unit 70 sequentially calculates the changing sweat rate, lactic acid concentration, and lactic acid secretion rate, and causes the display unit 4 to display a graph or the like indicating the change of the value. Further, the control unit 70 controls the operation of the biological information measuring apparatus 1 according to the signal input from the operation unit 5.

  The user looks at the display unit 4 and confirms the sweating rate, lactic acid concentration, lactic acid secretion rate, and the transition of these values, so that the current state of the human body (blood) and the transition so far Can be recognized.

  FIG. 4A is a flowchart showing an initial operation of the biological information measuring apparatus 1. FIG. 4B is a flowchart showing a normal operation of the biological information measuring apparatus 1. 5A to 5D are diagrams showing the relationship between the tip of the sweat 8 in the flow path 20 (20A) and the positions set at a predetermined interval. The operation of the biological information measuring apparatus 1 will be described with reference to FIGS. 4A, 4B, and 5A to 5D.

  When the biological information measuring device 1 is attached to the skin surface S and the operation is started, as shown in FIG. 4A, the biological information measuring device 1 is placed at the tip of the sweat 8 in the flow path 20 as an initial operation. The operation of determining the corresponding position (position of sweat 8) is performed. In other words, after the biological information measuring apparatus 1 is installed on the skin surface S, the position of the sweat 8 serving as a reference in the flow path 20 necessary for performing the normal operation is determined.

With reference to FIG. 4A, the flow of the initial operation of the biological information measuring apparatus 1 will be described.
After the biological information measuring device 1 is mounted on the skin surface S, the power is turned on by the operation of the operation unit 5 by the user (switch ON: step S101). When the power is turned on, the timer starts measurement (step S102). In the present embodiment, the timer is set to 1 minute as the first predetermined time. Accordingly, in step S103, it is determined whether or not a first predetermined time (1 minute) has elapsed. Note that the first predetermined time may be set as appropriate.

  If the first predetermined time has not elapsed (step S103: NO), step S103 is repeated. When the first predetermined time has elapsed (step S103: YES), the process proceeds to step S104.

  In step S104, the amount of received light is detected. The control unit 70 drives the light source driving unit 93. The light source drive unit 93 causes all light source elements 31 to emit light and irradiates the near-infrared light to the flow path 20 (20A). Then, the control unit 70 drives the received light amount measurement unit 94. The received light amount measuring unit 94 receives near infrared light transmitted through the flow path 20 by the light receiving element 41. The data received by the light receiving element 41 is converted into a digital signal by the A / D conversion unit 95 and sent to the control unit 70. Then, the process proceeds to step S105.

  In step S105, the presence or absence of sweat 8 is determined. The control unit 70 (sweat position determination unit 71A) determines the presence or absence of sweat 8 in the flow path 20 based on the light amount correlation table 82 and the detected light amount. The determination of the presence / absence of sweat 8 is based on determining that there is sweat 8 in the flow path 20 when the detected light amount is smaller than the reference intensity (light amount) stored in the light amount correlation table 82. If the detected light amounts are the same, it is determined that there is no sweat 8 in the flow path 20.

  Next, the process proceeds to step S106, and if it is determined that there is no sweat 8 in the flow path 20 (step S106: NO), the process proceeds to step S103. When it is determined that there is sweat 8 in the flow path 20 (step S106: YES), the process proceeds to step S107.

  In step S107, the position corresponding to the tip of sweat 8 (position of sweat 8) is determined. Since the light amount is detected at predetermined intervals set in the flow path 20, the sweat position determination unit 71 </ b> A corresponds the position at the predetermined interval at which the sweat 8 is determined to exist to the tip of the sweat 8. Judge as the position to be. When there are a plurality of positions determined to be present, the position on the most downstream side is determined as the position corresponding to the tip of the sweat 8.

  Thus, the initial operation of the biological information measuring device 1 is completed. The position corresponding to the tip of the sweat 8 obtained by the initial operation (the position of the sweat 8) is stored in the storage unit 80, and becomes the reference position of the sweat 8 in the subsequent normal operation.

Next, the flow of normal operation of the biological information measuring apparatus 1 will be described with reference to FIG. 4B.
After completing the initial operation, the control unit 70 shifts to the normal operation and newly starts measurement by a timer (timer start: step S201). In the present embodiment, the timer is set to 3 minutes as the second predetermined time. Accordingly, in step S202, it is determined whether or not a second predetermined time (3 minutes) has elapsed.

  If the second predetermined time has not elapsed (step S202: NO), step S202 is repeated. When the second predetermined time has elapsed (step S202: YES), the process proceeds to step S203.

  In step S203, the amount of received light is detected. As in step S104, the control unit 70 drives the light source driving unit 93 to cause all the light source elements 31 to emit light, and irradiates the near-infrared light to the flow path 20 (20A). Then, the control unit 70 drives the received light amount measurement unit 94. The received light amount measuring unit 94 receives near infrared light transmitted through the flow path 20 by the light receiving element 41. The data received by the light receiving element 41 is converted into a digital signal by the A / D conversion unit 95 and sent to the control unit 70, and then the process proceeds to step S204.

  In step S204, the position corresponding to the tip of sweat 8 (position of sweat 8) is determined. The sweat position determination unit 71 </ b> A determines positions at predetermined intervals where it is determined that there is sweat 8 as a position corresponding to the tip of the sweat 8. When there are a plurality of positions determined to be present, the position on the most downstream side is determined as the position corresponding to the tip of the sweat 8. Then, the process proceeds to step S205.

  In step S205, it is determined whether or not the position of the sweat 8 determined in step S204 is different from the previous position. If they are different (step S205: YES), the process proceeds to step S206. If they are not different and are the same as the previous position (step S205: NO), the process proceeds to step S212.

  In step S212, the value of the number of times (detection count) of detecting the amount of received light in step S203 is incremented. Although it is initially set as one time, if it is determined in step S205 that it is not different from the previous position, it is incremented by +1 in step S212. Then, the process proceeds to step S202. In the present embodiment, the operations from step S202 to step S205 are repeated while incrementing until it is determined in step S205 that the determined position is different from the previous position.

  Note that, in step S205, the position of the sweat 8 determined to be different from the previous position is stored in the storage unit 80. This position is a reference for the position of the next sweat 8.

  In step S206, the amount of sweat in which the sweat 8 flows is calculated. The sweating rate calculation unit 71B uses the sweat amount correlation table 83 to determine the position corresponding to the tip of the current sweat 8 determined in step S204 and the position corresponding to the tip of the previous sweat 8 determined in step S107. Read the amount of sweat between. The sweat amount correlation table 83 describes the sweat amount for each section. In the case of the specification that does not use the sweat amount correlation table 83, the position of the flow path is set at a predetermined distance. Therefore, the difference between the sections (flow path length) is obtained, and the flow path breaks at a known value. The sweat amount can also be calculated by reading and multiplying the area. Next, the process proceeds to step S207.

  In step S207, the number of times of detection of the amount of received light (number of detections) is read, and the process proceeds to step S208.

  In step S208, the perspiration rate of sweat 8 is calculated. The sweating rate calculation unit 71B calculates the elapsed time from the time when it is determined that there is sweat 8 in step S106. Specifically, a value obtained by multiplying the number of detections read in step S207 by the second predetermined time (3 minutes) is the elapsed time. Then, the sweating rate calculation unit 71B calculates the sweating rate by dividing the sweat amount calculated in step S206 by the elapsed time.

  Here, referring to FIG. 5A to FIG. 5D, in normal operation, the position (referred to as “A”) of the actual sweat 8 in the flow path 20 (20A) and the flow path 20 are set at predetermined intervals. The relationship between the position and the position (P) will be described. Note that P is a position where the light source element 31 (light receiving element 41) is installed. Further, the sweat 8 flows from P1 to P5. In other words, the direction from P1 to P5 is the downstream direction (downstream side).

As shown in FIG. 5A, the position P corresponding to the tip end portion A _n-1 when the position A of the tip end portion of the actual sweat 8 is A _n-1 is set to P1. Here, when the tip portion of perspiration 8 when a predetermined time (3 minutes) has elapsed was A _n, a position P corresponding to the distal portion A _n becomes P2.

  Here, a method of determining P2 will be described using FIG. 5A as an example. In step S <b> 204, when the position P corresponding to the tip of the sweat 8 is determined, the position P determined that the sweat 8 is present is obtained. In this case, there are two (plural) positions P1, P2 that are determined as having sweat 8. In this case, in the present embodiment, the position P corresponding to the most distal side is determined as the position P corresponding to the distal end portion (position A of the distal end portion), and therefore the position P corresponding to the distal end portion is determined to be P2. Thereafter, in step S205, it is determined whether P2 is different from the previous position (in this case, P1).

In FIG. 5A, the distance that the sweat 8 has moved within a predetermined time (3 minutes) is actually _An −A _n−1 , but in this embodiment, it corresponds to the distance P2−P1. . Thus, reading the sweat amount corresponding to between P2 and P1 sweat quantity correlation table 83, also calculates the elapsed time until the P1 P2 (from A _n-1 up to the A _n), P1, P2 The perspiration rate is calculated by dividing the amount of perspiration by the elapsed time (3 minutes).

As shown in Figure 5B, an A _n-1 is the leading end portion of the previous perspiration 8, when the distal end portion after 3 minutes (the number of detection times once) becomes A _n, corresponding to the previous and the current tip The positions to perform are P2 and P4. Therefore, the perspiration rate is calculated by dividing the sweat amount between P2 and P4 by the elapsed time (3 minutes).

As shown in FIG. 5C, a tip A _n-1 of the previous perspiration 8, when a A _n After 3 minutes, as a position corresponding to the previous and current tip, both the P2 . In this case, since the position (P2) determined in step S205 is not different from the previous position (P2) (step S205: NO), the process proceeds to step S212. The operations from step S202 to step S205 are repeated while incrementing until the determined position P is different from the previous position P (YES in step S205).

The diagram shown in FIG. 5D shows the diagram when the flow of the sweat 8 in FIG. 5C is maintained.
As shown in FIG. 5D, the distal end portion of the sweat 8, from the previous A _n, 3 minutes for a predetermined time (one increment) the current after a lapse of situation, when A n _{+ 1,} the previous and current tip Corresponding positions are P2 and P4. In this case, the perspiration rate is calculated by reading the sweat amount corresponding to P2 and P4 from the sweat amount correlation table 83, and also the elapsed time from P2 to P4 (from _An-1 to _{An + 1} ). And the perspiration rate is calculated by dividing the sweat amount between P2 and P4 by the elapsed time.

  Specifically, for the elapsed time, first, in step S207, the number of detections is read. In this case, since the increment is performed once, the number of detections is two. Therefore, the elapsed time is 3 minutes × 2 times = 6 minutes. Therefore, the perspiration rate is a value obtained by dividing the amount of sweat between P2 and P4 by the elapsed time (6 minutes).

  Here, returning to FIG. 4B, after calculating the perspiration rate in step S <b> 208, the process proceeds to step S <b> 209 to detect conductivity for lactic acid as a specific component. The control unit 70 drives the conductivity measuring unit 96 to apply a voltage to the pair of electrodes 52 installed in the stimulus-responsive gel 51 and detect a current value flowing between the electrodes 52. The conductivity detected by the conductivity measuring unit 96 is converted into a digital signal by the A / D conversion unit 97 and sent to the control unit 70.

  Next, the process proceeds to step S210, and the concentration of lactic acid is calculated. The component concentration processing unit 72 calculates the lactic acid concentration based on the conductivity correlation table 84 and the conductivity input from the A / D conversion unit 97.

Next, the process proceeds to step S211, and the secretion rate of lactic acid is calculated. The secretion rate processing unit 73 calculates the secretion rate of lactic acid by multiplying the perspiration rate calculated in step S208 by the concentration of lactic acid calculated in step S210.
After step S211, the process returns to step S202, and the above-described operation is repeated.

  Then, the control unit 70 displays data such as the calculated sweat rate, lactic acid concentration, and lactic acid secretion rate on the display unit 4. Moreover, the transition of these values is also displayed in a graph or the like.

According to the embodiment described above, the following effects can be obtained.
According to the biological information measuring apparatus 1 of the present embodiment, the biological information measuring device 1 includes the collection unit 10, the flow path 20, the light source unit 30, the light receiving unit 40, and the perspiration rate processing unit 71. The sweat 8 collected from the collection unit 10 flows through the flow path 20 from the start end 20a toward the end 20b. The light source unit 30 irradiates near-infrared light absorbed by moisture in sweat to the channel 20, and the light-receiving unit 40 receives near-infrared light transmitted through the channel 20. Then, the perspiration rate processing unit 71 detects a change in the intensity of the near infrared light received by the light receiving unit 40 every predetermined time, and calculates the perspiration rate based on the sweat amount of the sweat 8 that has flowed corresponding to the predetermined time. In this way, since near-infrared light having a wavelength that is absorbed by moisture in sweat is used, a change in the intensity of light can be reliably detected, so that the presence or absence of sweat 8 can be reliably determined. In addition, since the change in light intensity is detected every predetermined time and the perspiration rate is calculated based on the amount of sweat 8 that has flowed during the predetermined time, it is not affected by the perspiration state even during exercise when the perspiration rate changes greatly. In addition, the perspiration rate can be reliably calculated. In addition, since the perspiration rate is calculated every predetermined time, it is possible to realize the biological information measuring apparatus 1 that can measure the perspiration rate accurately and continuously.

  According to the biological information measuring apparatus 1 according to this application example, the light source unit 30 and the light receiving unit 40 include the light source element 31 and the light receiving element 41 that are installed along the flow path 20 at predetermined intervals. In addition, the sweating rate processing unit 71 includes a sweat position determination unit 71A and a sweating rate calculation unit 71B. Then, the sweat position determination unit 71A determines the position of the sweat 8 by determining the presence or absence of the sweat 8 at the position of the predetermined interval based on the light intensity change at the position of the predetermined interval every predetermined time. The sweat rate calculation unit 71B then calculates the sweat amount corresponding to the flow path length from the position where the previous sweat 8 is detected to the position where the next sweat 8 is detected until the next position is detected from the previous position. The perspiration rate can be calculated reliably by dividing by the elapsed time. In this case, since the previous position and the current position are set at predetermined intervals, the flow path length can be calculated. Then, the sweat amount is calculated by multiplying the flow path length by a predetermined flow path cross section. Further, since the detection is performed at predetermined time intervals, the time required until the next position is detected from the previous position is calculated. Thus, the sweat rate can be reliably calculated by dividing the sweat amount by the elapsed time. Therefore, the biological information measuring device 1 capable of continuously measuring the sweating rate can be realized by calculating the sweating rate by determining the position of the sweat 8 depending on the presence or absence of the sweat 8 at predetermined time intervals. .

  According to the biological information measuring apparatus 1 of the present embodiment, the intensity change can be achieved by using near-infrared light that has high transmittance among infrared light and has a large amount of infrared light absorbed by moisture in sweat. The output can be increased (the output of the light receiving element 41 can be made remarkable). Therefore, a change in intensity can be detected easily and reliably. Further, unlike other infrared light, near infrared light has no heating action, so there is no need to consider the influence of heat on sweat components, and the convenience of the biological information measuring apparatus 1 is improved.

  According to the biological information measuring apparatus 1 of the present embodiment, the flow path 20 (20A) includes a plurality of bent portions 21, so that the flow path length can be increased and the flow path 20 (20A) can be configured compactly. it can. Thereby, it becomes possible to measure a sweating rate for a long time, and size reduction of living body information measuring device 1 can be attained.

  According to the biological information measuring apparatus 1 of the present embodiment, the component concentration detection unit 50 is installed in the new flow path 20B branched from the flow path 20, and thus does not affect the measurement of the sweat rate. Information (dielectric constant) for calculating the concentration of lactic acid as a specific component is detected. The flow resistance is designed so that the ratio of A and B is constant, where A is the amount that the sweat 8 moves to the sweat rate measuring unit per unit time and B is the amount that the sweat 8 moves to the sweat component concentration measuring unit. . The component concentration processing unit 72 can calculate the concentration of lactic acid contained in the sweat 8 based on the dielectric constant detected by the component concentration detection unit 50.

  According to the biological information measuring apparatus 1 of the present embodiment, the secretion rate processing unit 73 can know the secretion rate of lactic acid based on the perspiration rate and the concentration of lactic acid. Thereby, for example, the amount of lactic acid secreted can be used as a measure of exercise intensity, and exercise intensity can be adjusted appropriately. In addition, since the secretion rate of lactic acid in blood can be estimated by knowing the secretion rate of lactic acid secreted into the sweat 8, the convenience of the biological information measuring device 1 is improved.

  According to the biological information measuring apparatus 1 of this embodiment, it is possible to know the secretion rate (secretion amount) of lactic acid as a specific component. Thereby, for example, it becomes possible to use it as a guideline for determining exercise intensity by comparing the amount of lactic acid secreted and the blood lactic acid concentration. In particular, in endurance competition (long-distance running, bicycle, cross-country skiing, etc.), it is possible to provide information useful for effectively enhancing endurance.

  According to the biological information measuring apparatus 1 of the present embodiment, the collection unit 10 is fixed to the skin surface S by the band 2 as the fixing unit, and thus the sweat 8 is stably collected even when the user is training. be able to.

[Second Embodiment]
FIG. 6 is a flowchart showing a normal operation of the biological information measuring apparatus 1 according to this embodiment.
The flowchart of the present embodiment is different from the flowchart of the normal operation shown in FIG. 4B of the first embodiment. In other words, in the program 81 of the first embodiment, a part of the processing method is different. Other configurations and initial operation flowcharts are the same as those in the first embodiment. Hereinafter, different parts of the flowchart will be mainly described.

  As shown in FIG. 6, in the flowchart of this embodiment, the part different from the flowchart shown in FIG. 4B of the first embodiment is that steps S205, S212, and S207 are deleted. Other steps are the same as in the first embodiment.

  Specifically, in step S304 (corresponding to step S204), after determining the position corresponding to the tip of sweat 8 (position of sweat 8), it is determined whether the determined position is different from the previous position ( Step S205) is deleted. Accordingly, the increment of the detection count corresponding to step S212 and the reading of the detection count corresponding to step S207 are deleted. Therefore, even when the determined position is not different from the previous position (same as the previous position), the process proceeds to step S305 and the sweat amount is calculated.

  Thereby, when the determined position is not different from the previous position, when the process proceeds to step S305 and the sweat amount is calculated, the sweat amount becomes 0 (zero), and then the process proceeds to step S306 and the perspiration rate. Is calculated, the perspiration rate is also 0 (zero). In step S309, the secretion rate is also 0 (zero).

The above contents will be described with reference to FIGS. 5C and 5D.
As shown in FIG. 5C, a tip A _n-1 of the previous perspiration 8, when a A _n After 3 minutes, as the position P corresponding to the previous and current tip, both the P2 Become. In this case, the sweating rate is 0 (zero) because there is no change in the sweating amount (the sweating amount is 0 (zero)).

The figure shown to FIG. 5D shall show the figure in case the flow of the sweat 8 in FIG. 5C is maintained similarly to 1st Embodiment.
As shown in FIG. 5D, the distal end portion of the sweat 8, from the previous A _n, this after 3 minutes elapse of a predetermined time period, when it becomes the A n _{+ 1,} as a position P corresponding to the previous and current tip Are P2 and P4. In this case, the perspiration rate is calculated by dividing the amount of sweat between P2 and P4 by the elapsed time (3 minutes). After that, the process after step S307 is performed.
In addition, according to embodiment mentioned above, there can exist the effect in 1st Embodiment similarly.

  The present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

  In each of the above embodiments, the component concentration detector 50 detects the concentration and secretion rate of lactic acid as a specific component in sweat. However, the concentration and secretion rate of sodium as a specific component may be detected. Thereby, the secretion rate (secretion amount) of sodium as a specific component can be known. For example, by knowing the amount of sodium secreted in sweat during exercise, it is possible to know the lack of salt concentration in the blood, so it is possible to maintain proper exercise intensity by encouraging the supply of salt. .

  In each of the embodiments described above, the flow path 20A is formed to be substantially parallel to the case 3 on the back side, in other words, to be substantially parallel to the skin surface S when the biological information measuring device 1 is attached to the skin surface S. Yes. However, it is not limited to this, and it may be formed so as to be substantially perpendicular to the skin surface S. In this case, the light source unit 30 and the light receiving unit 40 may be disposed relative to the flow path 20A so as to straddle the bent flow path 20A. With such an arrangement, the degree of freedom of arrangement of the flow path 20, the light source unit 30, the light receiving unit 40, and the like inside the biological information measuring device 1 can be improved.

  In each of the above embodiments, when detecting the concentration of lactic acid, the component concentration detection unit 50 detects the concentration by installing the electrode 52 on the stimulus-responsive gel 51 and detecting the conductivity between the electrodes. However, the present invention is not limited to this, and the stimuli-responsive gel 51 includes, for example, fine particles having high reflectance such as silica fine particles, so that when lactic acid is taken in, the structural color changes due to the change in the particle interval. The concentration of lactic acid may be detected by detecting a change in color tone.

  In each of the embodiments described above, the component concentration detection unit 50 uses the stimulus-responsive gel 51 to detect the concentration of lactic acid as a specific component in sweat. However, the present invention is not limited to this, and the concentration of lactic acid may be detected using an enzyme sensor.

  In each of the embodiments described above, the flow path 20A is configured to have a plurality of bent portions 21 and bend. However, the present invention is not limited to this, and it may be configured in a spiral (spiral) form. Even with such a configuration, the length of the flow path can be increased and the configuration can be made compact, the sweating rate can be measured for a long time, and the biological information measuring apparatus 1 can be downsized. be able to.

  In each of the above embodiments, the flow path 20 is configured in a tubular shape (hollow tube). However, the present invention is not limited to this, and a groove is formed by performing etching or laser processing on a plate-like member such as a glass substrate, and the groove is covered with a plate-like member such as a glass substrate. You may comprise a flow path. With this configuration, the fixing structure and unitization of the flow path, the light source unit 30, the light receiving unit 40, and the like become easy. Further, the size can be further reduced.

  In each of the above embodiments, near infrared light is used as light having a wavelength that is absorbed by moisture in sweat. However, the present invention is not limited to this, and light such as mid-infrared light, far-infrared light, and laser light may be used.

  In each said embodiment, although the line light source is used as the light source part 30, you may use an array light source.

  In each of the above embodiments, the light receiving unit 40 is configured by a line sensor using a photodiode. However, such photodiodes may be mounted in a high density in an array.

  In the above embodiments, the second predetermined time is 3 minutes. However, the present invention is not limited to this, and by setting the second predetermined time to 3 minutes or less (for example, 1 minute) and calculating the sweat rate, component concentration, secretion rate, etc., more continuous, reliable and accurate detection is performed. be able to. Conversely, the second predetermined time may be set longer than 3 minutes. The predetermined time may be set as appropriate depending on exercise intensity, sweating amount, and the like.

  In each of the above embodiments, the display unit 4 displays data such as the calculated sweat rate, lactic acid concentration, and lactic acid secretion rate. However, the present invention is not limited to this, and an alarm unit including an element that outputs sound, an element that emits light, an element that generates vibration, and the like may be provided. By providing such an alarm unit, for example, when the amount of change in the lactate secretion rate is high for the user during training, an alarm is issued via the alarm unit to the user. You can call attention. The user can take measures such as maintaining proper exercise intensity by this warning.

  DESCRIPTION OF SYMBOLS 1 ... Biological information measuring device, 2 ... Band (fixed part), 8 ... Sweat, 10 ... Collecting part, 20 ... Channel, 20A, 20B ... Channel, 20a ... Start end, 20b ... End, 21 ... Bending part, 30 DESCRIPTION OF SYMBOLS ... Light source part, 31 ... Light source element, 40 ... Light receiving part, 41 ... Light receiving element, 50 ... Component density | concentration detection part, 60 ... Sweat discharge | emission mechanism part, 70 ... Control part, 71 ... Sweating speed processing part, 71A ... Sweat position judgment , 71B ... sweating rate calculation unit, 72 ... component concentration processing unit, 73 ... secretion rate processing unit, 80 ... storage unit, 81 ... program, 82 ... light quantity correlation table, 83 ... sweat amount correlation table, 84 ... conductivity correlation Table: 93 ... Light source drive unit, 94 ... Received light amount measurement unit, 96 ... Conductivity measurement unit, S ... Skin surface.

Claims (9)

A collection unit for collecting sweat;
A flow path in which a start end communicates with the collection unit and the sweat collected in the collection unit is converted into droplets and flows, and a termination is opened to the atmosphere;
A light source unit that irradiates the channel with light having a wavelength that is absorbed by moisture in the sweat;
A light receiving portion for receiving the light transmitted through the flow path;
A perspiration rate processing unit that detects a change in intensity of the light received by the light receiving unit every predetermined time, and calculates a perspiration rate based on the amount of sweat that has flowed corresponding to the predetermined time;
A biological information measuring device comprising: The biological information measuring apparatus according to claim 1,
The light source unit has light source elements installed at predetermined intervals along the flow path,
The light receiving unit has a light receiving element for detecting light of each of the light source elements,
The sweat rate processing unit
A sweat position determination unit that detects the presence or absence of the sweat by detecting a change in intensity of the light at the position of the predetermined interval for each predetermined time;
The amount of sweat corresponding to the flow path length from the position where the previous sweat was detected to the position where the next sweat was detected, and the elapsed time from the previous position until the next position was detected, A sweating rate calculating unit for calculating a sweating rate;
A biological information measuring device comprising: The biological information measuring apparatus according to claim 1 or 2, wherein
The biological information measuring apparatus according to claim 1, wherein the light applied to the flow path is near infrared light. It is a biological information measuring device according to any one of claims 1 to 3,
The biological information measuring device, wherein the flow path includes a plurality of bent portions. It is a biological information measuring device according to any one of claims 1 to 4,
A component concentration detector that is installed in a channel branched from the channel and detects information for calculating the concentration of a specific component contained in the sweat;
A component concentration processing unit that calculates the concentration based on the information detected by the component concentration detection unit;
A biological information measuring device comprising: The biological information measuring apparatus according to claim 5,
A biological information measuring device further comprising a secretion rate processing unit that calculates a secretion rate of the specific component based on the sweat rate and the concentration of the specific component. The biological information measuring apparatus according to claim 6,
The biological information measuring device, wherein the specific component is lactic acid. The biological information measuring device according to claim 6 or 7, wherein
The biological information measuring device, wherein the specific component contains sodium. It is a biological information measuring device according to any one of claims 1 to 8,
A biological information measuring apparatus comprising a fixing unit for fixing the sampling unit to the skin surface.

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