Biological information measurement device and biological information measurement program

Abstract

To provide a biological information measuring apparatus capable of more accurately measuring pulse waves.SOLUTION: The light emitting unit (the G light emitting unit 14g or the R light emitting unit 14r) irradiates a predetermined part of the person to be measured with light. The light receiving portion (the G light receiving portion 15g or the R light receiving portion 15r) receives light reflected at a predetermined position or light transmitted through a predetermined position. A pulse wave acquisition part 111 acquires the pulse wave of the person to be measured based on the light received by the light receiving part. The light emission control unit 112 performs control to change the wavelength of the light emitted by the light emitting unit on the basis of the position determination information indicating whether the measurement subject is located outdoors or indoors and the detection result indicating whether or not the measurement subject is in a motion state, and performs control to change the light amount of the light emitted by the light emitting unit in accordance with the brightness around the measurement subject.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a biological information measuring device and a biological information measuring program. [Background technology]

[0002] In recent years, a biological information measurement method employing a pulse wave measurement technique such as that described in Patent Document 1 has become popular. Smartwatches that function as devices are becoming popular. To avoid the influence of external light, the smartwatch uses a green light when measuring pulse waves. The light is irradiated onto the arm of the person wearing the device (the person being measured). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-116210 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, when the subject's body is moving a lot, the green light emitting element and the red light emitting element are used. When the body movement is small, the green light emitting element is turned off and the red light emitting element is turned on. It is stated that only the light-emitting element is turned on. It is not enough to simply select a light emitting element according to the size of the pulse wave. There is a demand for a biological information measurement device and a biological information measurement program that can do this.

[0005] The present invention relates to a biological information measuring device and a biological information measuring apparatus capable of measuring pulse waves more accurately. The purpose is to provide a program. [Means for solving the problem]

[0006] The present invention provides position determination information indicating whether a person being measured is located outdoors or indoors. a position determination information acquisition unit that acquires information on the subject's movement, and a motion information acquisition unit that detects whether the subject is in an exercise state or not. a state detection unit, a brightness detection unit for detecting the brightness around the subject, and a A light emitting unit that irradiates a predetermined location with light, and a light that is reflected at the predetermined location or transmitted through the predetermined location. a light receiving unit that receives light emitted from the subject, and a light receiving unit that receives the light and measures the pulse wave of the subject based on the light received by the light receiving unit. a pulse wave acquiring unit that acquires the position determination information acquired by the position determination information acquiring unit and the exercise state detecting unit; and based on the detection result indicating whether the subject is in an exercise state detected by the output unit, The light emitting unit is controlled to change the wavelength of the light emitted, and the brightness detection unit detects the brightness of the object to be measured. The light emitting unit controls the amount of light emitted by the light emitting unit to change depending on the brightness of the surroundings of the user. A biological information measuring device is provided that includes a light control unit.

[0007] The present invention is a method for determining whether a subject is located outdoors or indoors by a computer. and detecting whether the subject is in an exercise state. a step of acquiring a value indicating the brightness of the surroundings of the subject; controlling a light emitting unit to irradiate a predetermined part of the subject with light; or a reception signal generated by the light receiving unit receiving light passing through the predetermined portion. and acquiring a pulse wave of the subject based on the received signal. Based on the position determination information and a detection result indicating whether the subject is in an exercise state or not, and controlling the light emitting unit to change the wavelength of the light emitted by the light emitting unit, and and controlling the light emitting unit to change the amount of light emitted in accordance with the value indicating the A biological information measurement program to be executed is provided. [Effects of the Invention]

[0008] According to the biological information measuring device and the biological information measuring program of the present invention, it is possible to measure pulse waves more accurately. It can be determined. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a block diagram showing a biological information measuring device according to an embodiment; [Figure 2] FIG. 2 is a characteristic diagram showing the relationship between wavelength and light absorption intensity. [Figure 3] FIG. 10 is a partial block diagram showing a modified example of the biological information measuring device according to the embodiment. [Figure 4] 1 is a flowchart illustrating a process executed by a biological information measurement device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a biological information measurement device and a biological information measurement program according to an embodiment will be described with reference to the accompanying drawings. In FIG. 1, the biological information measurement device 10 and the smartphone 20 are They communicate with each other via short-range wireless communication such as Bluetooth (registered trademark). The biological information measurement device 10 is configured as a wristwatch. However, in FIG. 1, the configuration as a watch is omitted. The biological information measurement device 10 is not limited to a wristwatch type, but may be configured as a ring type or a finger type. The biological information measuring device 10 may be configured as a ring-shaped or A device worn on the tip of a finger makes it easier to measure pulse waves than a wristwatch-type device.

[0011] The biological information measurement device 10 includes a calculation unit 11, a ROM (Read Only Memory) 12, a RAM (Ra Access Memory 13, G light emitting unit 14g, R light emitting unit 14r, G light receiving unit 15g, R light receiving unit a short-range wireless communication unit 16, a motion sensor 17, a brightness sensor 18, and a display unit 19. The smartphone 20 includes a GNSS receiver 21, a signal strength detector 22, and a short-distance wireless communication The signal strength detector 20 includes a signal receiving unit 23, a data acquiring unit 24, a data processing unit 25, and a display unit 26. 22, the data acquisition unit 24, and the data processing unit 25 are the central processing unit (C) of the smartphone 20. PU).

[0012] The GNSS receiver 21 of the smartphone 20 receives the Global Navigation Satellite System (GNSS). Receives radio waves from satellites for the Global Navigation Satellite System (GNSS). GNSS is an example of The signal strength detection unit 22 detects the signal strength of the GNSS (Global Positioning System). The receiver 21 detects the signal strength of the received GNSS signal and determines whether the signal strength is equal to or greater than a threshold. The information indicating whether the short-distance wireless communication unit 23 is connected or not is generated and supplied to the short-distance wireless communication unit 23.

[0013] If the signal strength of the GNSS signal is equal to or greater than a threshold, the biological information measuring device 10 and the smartphone The subject carrying the mobile phone 20 is located outdoors, and if the signal strength is below the threshold, the subject is indoors. Therefore, the discrimination information generated by the signal strength detection unit 22 is This is position determination information that indicates whether the person measuring is located outdoors or indoors. The wireless communication unit 23 transmits the position determination information to the short-range wireless communication unit 16 .

[0014] The GNSS receiving unit 21 and the signal strength detecting unit 22 detect whether the person being measured is located outdoors. Instead of determining whether it is located indoors, it checks the wireless LAN (Wi-Fi) access point. The position of the person being measured may be determined based on the distance from the ground. The subject is indoors and uses geomagnetic positioning based on the magnetic force emitted by steel frames or rebars. It may be determined whether the subject is located outdoors or indoors. The method for determining whether the information is correct is arbitrary.

[0015] The components of the biological information measuring device 10 will be described. The calculation unit 11 is a microcomputer. The calculation unit 11 can be configured with a CPU of a computer. The ROM 12 includes a pulse wave acquisition unit 11 and a light emission control unit 112. A computer program that controls the light emission by the G light emitting unit 14g and the R light emitting unit 14r. The calculation unit 11 operates the RAM 13. The ROM 12 is used as a general-purpose memory while the computer program stored in the ROM 12 is executed. The calculation unit 11 executes the computer program, and the pulse wave acquisition unit 111 and a light emission control unit 112 are functionally configured.

[0016] The G light-emitting section 14g is a light-emitting diode (hereinafter referred to as LED) that emits green light (hereinafter referred to as G light). ) can be configured. G light has a wavelength of 500 nm to 600 nm, for example. The R light emitting unit 14r is configured with an LED that emits red light (hereinafter referred to as R light). For example, R light is light having a wavelength of 640 nm to 780 nm. As will be described later, the G light emitting unit 14g and the R light emitting unit 14r emit G light at predetermined locations on the subject. The predetermined area (hereinafter referred to as the light irradiation area) is, for example, the wrist. This is the back side of the sword.

[0017] The reason why G light or R light is used to measure the pulse wave is as follows. This graph shows the relationship between wavelength and absorption intensity when light is irradiated onto hemoglobin and water. The line indicates the absorption strength of hemoglobin, and the dashed line indicates the absorption strength of water. The absorption strength of hemoglobin and water is low in the 600nm to 1500nm range, The wavelength of G light, 500nm to 600nm, is close to the optical window, and the wavelength of R light, 64nm, is close to the optical window. The wavelength range from 0 nm to 780 nm is within the optical window. Therefore, it is preferable to use G light or R light. do.

[0018] The G light receiving section 15g and the R light receiving section 15r receive the G light emitting section 14g and the R light emitting section 14r respectively. The G light receiving section 15g is provided on the same side as the G light emitting section 14r. The R light receiving section 15r receives the reflected light from the illuminated area when the R light emitting section 14r When light is emitted, the reflected light from the illuminated area is received. 5r is provided on the opposite side of the G light emitting unit 14g and the R light emitting unit 14r with respect to the light irradiation area. In addition, the G light or the R light may be received after passing through a part of the body of the person being measured.

[0019] The short-distance wireless communication unit 16 receives the position determination information transmitted from the short-distance wireless communication unit 23. The short-distance wireless communication unit 16 functions as a position determination information acquisition unit that acquires position determination information. The biological information measurement device 10 uses the same GNSS receiver 21 and signal strength detector 22. The biological information measurement device 10 may include a GNSS receiving unit and a signal strength detecting unit. and a signal strength detection unit, the GNSS receiving unit and the signal strength detection unit acquire position determination information. The short-range wireless communication unit 16 functions as a GNSS receiver that is received by the GNSS receiver 21. The signal strength detection unit provided in the biological information measurement device 10 receives the GNSS signal and detects the signal strength of the GNSS signal. may be detected.

[0020] The motion sensor 17 detects the motion of the subject. The motion sensor 17 includes at least an acceleration sensor. The motion sensor 17 detects the acceleration of the subject when the subject moves. In order to detect the attitude, a gyro sensor may be included in addition to the acceleration sensor. The motion sensor 17 determines whether the subject is exercising based on whether the motion detection value is equal to or greater than a threshold value. The motion sensor 17 and the calculation unit 11 detect whether the subject is in an exercising state. It functions as a motion state detection unit that detects whether or not there is a motion.

[0021] If the detected value is equal to or greater than the threshold value, the calculation unit 11 determines that the subject is in an exercise state. If the detected value is less than the threshold, the subject is determined to be in a non-exercise state. The state in which the subject is exercising refers to the state in which the subject's arms, etc. are moving. The non-exercise state is a state of rest in which the subject is not moving much.

[0022] The brightness sensor 18 detects the brightness around the subject. The brightness sensor 18 can be configured with a cadmium sulfide cell. The detected brightness is supplied to the calculation unit 11. The brightness around the subject is expressed as illuminance. Alternatively, it may be expressed in terms of brightness.

[0023] The pulse wave acquiring unit 111 receives the reflected light from the light irradiated area by the G light receiving unit 15g or the R light receiving unit 15r. The pulse wave of the subject is acquired based on the reception signal generated by receiving the signal. If the signal is a voltage value corresponding to the intensity of the reflected light, the calculation unit 11 converts the voltage value into a digital value. The pulse wave acquiring unit 111 acquires the pulse wave of the subject based on the digital value indicating the intensity of the reflected light. do.

[0024] The display unit 19 may display the pulse wave acquired by the pulse wave acquisition unit 111. The heart rate may be calculated based on the pulse wave, and the display unit 19 may display the heart rate. The display panel may be a liquid crystal panel or an organic EL panel. If the motion detection value is greater than or equal to the threshold and it can be determined that the subject is moving vigorously, The calculation unit 11 displays on the display unit 19 a character or image indicating that the device is not suitable for acquiring a pulse wave. The display may be controlled to be displayed.

[0025] The calculation unit 11 calculates a stress index based on the pulse wave, and the display unit 19 displays the stress index. It is also possible to calculate the power spectrum density from the pulse wave and measure the low frequency component (0.04 Hz) ~0.15Hz power spectrum) to high frequency components (0.15Hz~0.4Hz power spectrum) The value obtained by dividing the frequency by the spectrum can be used as a stress index. The high frequency components represent both the high and low frequency components of the parasympathetic nervous system.

[0026] The light emission control unit 112 controls the G light emission from the G light emitter 14g and the R light emitter 14r. The light emission control unit 112 controls the emission of the G light-emitting unit 14g and the R light-emitting unit 14r. When one of them is controlled to be in a light emitting state, the other is controlled to be in a non-light emitting state. 2 controls the amount of G and R light emitted.

[0027] The short-distance wireless communication unit 16 transmits data indicating the pulse wave acquired by the pulse wave acquisition unit 111 (pulse wave data ) may be transmitted to the short-range wireless communication unit 23. Alternatively, the pulse wave data received by the pulse wave analyzer 3 may be acquired, and the data processing unit 25 may process the pulse wave data. The display unit 26 may display a waveform obtained by processing the pulse wave data. The heart rate or stress index is calculated based on the data, and the display unit 26 displays the heart rate or stress index. The display unit 26 may be a liquid crystal panel or an organic EL panel. Whether or not the smartphone 20 acquires pulse wave data may be determined. How pulse wave data is used is up to you.

[0028] The short-range wireless communication unit 16 transmits the motion detection value from the motion sensor 17 to the short-range wireless communication unit 23. The data acquisition unit 24 acquires the motion detection value received by the short-range wireless communication unit 23. The data processing unit 25 detects that the motion detection value is greater than or equal to the threshold value and the subject is moving vigorously. If it is determined that the device is not suitable for acquiring a pulse wave, the display unit 26 displays a message indicating that the device is not suitable for acquiring a pulse wave. Alternatively, the control may be performed so that an image is displayed.

[0029] As shown in FIG. 3, instead of providing the G light emitting unit 14g and the R light emitting unit 14r, Alternatively, an RGB light emitting unit 14 including LEDs of each color that emit blue light (hereinafter referred to as B light) may be used. Instead of providing the G light receiving section 15g and the R light receiving section 15r, the RGB light emitting section 14 emits light. A light receiving section 15 may be used to receive reflected light from the illuminated area when the light is applied.

[0030] When the configuration of FIG. 3 is used, the light emission control unit 112 controls the light emitted by the RGB light emitting unit 14. The light emission control unit 112 controls the wavelength (i.e., color of light) of the RGB light source so as to emit G light. The light emitting unit 14 is controlled to emit red light, and the RGB light emitting unit 14 is controlled to emit red light. The control unit 112 may adjust the wavelength of the light emitted within the wavelength range of the G light, or may adjust the wavelength of the R light. The wavelength of the emitted light may be adjusted within the range.

[0031] Using the flowchart shown in FIG. 4, the calculation unit 11 will explain how the biological information measurement device 10 operates. The flowchart shown in FIG. 4 explains how the biological information measurement device 10 controls the The flowchart shown in FIG. 1 shows the processes that the biological information measurement program causes the computer to execute.

[0032] In FIG. 4, when the power supply of the biological information measurement device 10 is turned on and processing is started, the calculation unit In step S1, the device 11 determines whether the subject is located outdoors based on the position determination information. If the person being measured is located outdoors (YES), the calculation unit 11 (light emission control unit 1 12) In step S3, the G light emitting unit 14g is controlled to emit G light, and the processing In step S1, the biological information measurement program is executed by the computer. The location determination function is used to determine whether the subject is located outdoors or indoors. This corresponds to the step of acquiring information.

[0033] If the subject is not located outdoors in step S1 (NO), the calculation unit 11 In step S2, it is determined whether the subject is in an exercising state. If the answer is YES, the calculation unit 11 (light emission control unit 112) performs the following in step S3: Then, the process proceeds to step S5. The control unit 112 controls the G light emitting unit 14g to emit G light at a reference light intensity. 2 is a measurement of the subject's state of exercise, which is executed by the computer through the biological information measurement program. This corresponds to the step of detecting whether or not

[0034] If the subject is not in an exercising state in step S2 (NO), the calculation unit 11 (light emission control unit 11 2) In step S4, the R light emitting unit 14r is controlled to emit R light, and the processing At this time, the light emission control unit 112 emits R light at the reference light amount. The R light-emitting unit 14r is controlled so as to emit the red light.

[0035] Steps S3 and S4 are executed by the computer under the biological information measurement program. This corresponds to a step of controlling the light emitting unit to irradiate a predetermined part of the person with light. Steps S3 and S4 are the location determination information that the biological information measurement program causes the computer to execute. The light emitting unit emits light based on the information and the detection result indicating whether the subject is in an exercise state. This corresponds to a step of controlling the wavelength of light to be changed.

[0036] In step S5, the calculation unit 11 determines whether the brightness around the subject is equal to or greater than a predetermined brightness. If the brightness of the surroundings is equal to or greater than a predetermined brightness (YES), the calculation unit 11 (generator In step S6, the light control unit 112 controls the G light emitting unit 14g or the R light emitting unit 14r to emit light. The amount of light is controlled to be greater than the reference amount of light, and the process proceeds to step S8. Step S5 is a step of causing the computer to execute the biological information measurement program to measure the surroundings of the subject. This corresponds to the step of obtaining a value indicating the brightness of the image.

[0037] If the surrounding brightness is above a certain level, the G light-emitting element 14g or the R light-emitting element 14r will emit light. Increasing the amount of light emitted from the sensor beyond the standard level allows for more accurate measurement of the pulse wave. do.

[0038] If the ambient brightness is not equal to or greater than the predetermined brightness in step S5 (NO), the calculation unit 11 (generator In step S7, the light control unit 112 controls the G light emitting unit 14g or the R light emitting unit 14r to emit light. The light emission control unit 112 sets the light intensity to the reference light intensity and moves the process to step S8. If the light is already emitting at the standard light intensity, the standard light intensity is maintained, and if the light intensity is increased beyond the standard light intensity, If the light intensity is equal to the reference value, the light intensity is returned to the reference value. The light-emitting part emits light according to the value indicating the brightness of the subject's surroundings, which is executed by the computer. This corresponds to a step of controlling the amount of light to be changed.

[0039] The light emission control unit 112 controls whether the G light emitting unit 14g or the R light emitting unit 14r is illuminated in response to the ambient brightness. The light emission control unit 112 may control the amount of light emitted in three or more stages. As the temperature increases, the amount of light emitted by the G light-emitting element 14g or the R light-emitting element 14r increases continuously. That's fine.

[0040] In step S8, the calculation unit 11 (pulse wave acquisition unit 111) The pulse wave of the subject is acquired based on the signal received from the unit 15r, and the process proceeds to step S9. Step S8 is a step of causing the computer to execute a predetermined The light reflected at a certain point or transmitted through a certain point is received by the light receiving unit. a step of acquiring a received signal, and a step of acquiring a pulse wave of the subject based on the received signal. This corresponds to pu.

[0041] In step S9, the calculation unit 11 determines whether or not a power-off operation has been performed. If the OFF operation is not performed (NO), the calculation unit 11 returns the process to step S1. The processing from S1 onwards is repeated. If the power-off operation is performed (YES), the calculation unit 11 At step S10, the power is turned off to terminate the process.

[0042] As described above, the biological information measuring device 10 uses the position determination information and the measurement subject's state of motion. Based on the detection result indicating whether or not the light-emitting unit (G light-emitting unit 14g, R light-emitting unit 14r, or R light-emitting unit 14r) The GB light emitting unit 14 changes the wavelength of the light emitted. The light intensity of the light emitted by the light emitting unit is adjusted according to the brightness of the surroundings of the subject. The measurement device 10 can measure the pulse wave more accurately.

[0043] Specifically, the light emission control unit 112 turns the light emitting unit green when the person being measured is outdoors. It is preferable that the light emission control unit 112 controls the light emission so that the light is emitted in a color corresponding to the state in which the subject is exercising. It is sometimes preferable to control the light emitting unit to emit green light. When the subject is indoors and not exercising, the light-emitting part will be illuminated in red. It is preferable to control the light to emit light.

[0044] The present invention is not limited to the above-described embodiment, and any other modifications may be made without departing from the gist of the present invention. Various changes are possible within a wide range. [Explanation of symbols]

[0045] 10 Biological information measuring device 11 Arithmetic section 12 ROM 13 RAM 14g G light-emitting part 14r R light emitting part 15g G receiver 15r R receiver 16 Near Field Communication Department 17 Motion Sensor 18 Brightness sensor 19 Display section

Claims

1. a position determination information acquisition unit that acquires position determination information for determining the position of the subject; an exercise state detection unit that detects the exercise state of the subject; a light emitting unit that irradiates light onto a predetermined location of the subject; a light receiving unit that receives light reflected at the predetermined location or light that passes through the predetermined location; a pulse wave acquiring unit that acquires a pulse wave of the subject based on the light received by the light receiving unit; a light emission control unit that controls the light emitting unit to emit red light when the subject is not outdoors and is not exercising; A biological information measuring device comprising:

2. a position determination information acquisition unit that acquires position determination information for determining the position of the subject; an exercise state detection unit that detects the exercise state of the subject; a light emitting unit that irradiates light onto a predetermined location of the subject; a light receiving unit that receives light reflected at the predetermined location or light that passes through the predetermined location; a pulse wave acquiring unit that acquires a pulse wave of the subject based on the light received by the light receiving unit; a light emission control unit that controls the light emitting unit to emit green light when the subject is outdoors or when the subject is exercising; A biological information measuring device comprising:

3. On the computer, acquiring position determination information for determining the position of the subject; detecting an exercise state of the subject; acquiring a value indicating the brightness of the subject's surroundings; controlling a light emitting unit to irradiate light onto a predetermined location of the subject; receiving light reflected at or transmitted through the predetermined location; acquiring a pulse wave of the subject based on the received signal; a step of controlling the light emitting unit to emit red light when the subject is not outdoors and is not exercising; A biological information measurement program that executes the above.

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