WO2018147192A1 - Dispositif et procédé de détection d'onde d'impulsion - Google Patents

Dispositif et procédé de détection d'onde d'impulsion Download PDF

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Publication number
WO2018147192A1
WO2018147192A1 PCT/JP2018/003637 JP2018003637W WO2018147192A1 WO 2018147192 A1 WO2018147192 A1 WO 2018147192A1 JP 2018003637 W JP2018003637 W JP 2018003637W WO 2018147192 A1 WO2018147192 A1 WO 2018147192A1
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Prior art keywords
pulse wave
light
light emitting
emitting element
signal
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PCT/JP2018/003637
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English (en)
Japanese (ja)
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充洋 小川
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学校法人帝京大学
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Priority to JP2018567404A priority Critical patent/JPWO2018147192A1/ja
Publication of WO2018147192A1 publication Critical patent/WO2018147192A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure

Definitions

  • the present invention relates to a pulse wave detection device and method.
  • This application claims priority based on Japanese Patent Application No. 2017-023761 for which it applied to Japan on February 13, 2017, and uses the content here.
  • Patent Document 1 a biological information processing apparatus including a pulse wave sensor is known (see, for example, Patent Document 1).
  • a photoelectric sensor or an ultrasonic sensor is used as a pulse wave sensor.
  • a pulse wave sensor a reflection type pulse wave sensor (a kind of photoelectric sensor) having a light emitting element and a light receiving element may be used.
  • the pulse wave data can be detected only by mounting the pulse wave sensor on the head mounted display as in the biological information processing apparatus described in Patent Document 1. The accuracy cannot be improved sufficiently.
  • a pulse wave sensor having a camera is used to improve the detection accuracy of pulse wave data, image analysis for calculating the pulse wave data is required, and the calculation load increases. .
  • the present invention has been made to solve the above problems, and an object thereof is to provide a pulse wave detection device and method capable of sufficiently improving the detection accuracy of pulse wave data while suppressing a calculation load. It is in.
  • One embodiment of the present invention includes a reflective pulse wave sensor having a light emitting element that irradiates a subject with light, and a light receiving element that receives light emitted from the light emitting element and reflected by the subject, and the reflective type It is a pulse wave detection apparatus provided with the biasing member which makes a pulse wave sensor contact between the eyebrows of the said test subject.
  • the light emitting element is a green LED.
  • the reflective pulse wave sensor further includes a diffusing unit disposed between the light emitting element and the subject.
  • the above-described pulse wave detection device further includes a differentiation operation unit that performs a differentiation operation on a signal based on the light received by the light receiving element.
  • the above-described pulse wave detection device further includes an output unit that outputs pulse wave data detected by the reflective pulse wave sensor, and the output unit is mounted on a portable terminal. .
  • the reflective pulse wave sensor and the biasing member are mounted on a head mounted display.
  • the urging member is a headband.
  • the light emitting element includes at least a first light emitting element and a second light emitting element, and the above pulse wave detection device is received by the light receiving element.
  • a signal analysis unit that analyzes a signal of the received light, a first signal that is a light signal received by the light receiving element when light is emitted from the first light emitting element, and light from the second light emitting element.
  • a light emitting element selection unit that selects a light emitting element to be used for detecting pulse wave data based on a second signal that is a signal of light received by the light receiving element when irradiated;
  • the used light emitting element selection unit when the first signal is more suitable as pulse wave data than the second signal, the used light emitting element selection unit detects the pulse wave data.
  • the used light-emitting element selecting unit detects pulse wave data.
  • the second light emitting element is selected as the light emitting element used in the above.
  • the light emitting element includes at least a first light emitting element and a second light emitting element
  • the light receiving element includes at least a first light receiving element and a second light receiving element.
  • the pulse wave detection device includes a signal analysis unit that analyzes a signal of light received by the first light receiving element and a signal of light received by the second light receiving element; A first signal that is a signal of light received by the first light receiving element when light is emitted from the first light emitting element, and a second signal that is received by light from the second light emitting element.
  • a light emitting element selection unit that selects a light emitting element to be used for detection of pulse wave data based on a second signal that is a signal of received light, on the basis of the first signal and the second signal. Used to detect pulse wave data Further comprising a use light receiving element selection unit for selecting the light element.
  • the used light emitting element selection unit detects the pulse wave data.
  • the first light emitting element is selected as the light emitting element used for the detection
  • the used light receiving element selection unit selects the first light receiving element as the light receiving element used for detecting the pulse wave data
  • the second signal is When it is more suitable as pulse wave data than the first signal, the used light emitting element selection unit selects the second light emitting element as a light emitting element used for detecting pulse wave data, and selects the used light receiving element.
  • the unit selects the second light receiving element as the light receiving element used for detecting the pulse wave data.
  • one embodiment of the present invention is a pulse wave detection method of a pulse wave detection device comprising a reflection type pulse wave sensor having a light emitting element and a light receiving element, and an urging member, wherein the urging member is the aforementioned urging member
  • a first step of closely attaching a reflection type pulse wave sensor between the eyebrows of the subject a second step of irradiating the subject with light by the light emitting element; and the light receiving element being irradiated from the light emitting element and reflected by the subject.
  • a pulse wave detection method for a pulse wave detection device including a third step of receiving the received light.
  • the present invention it is possible to provide a pulse wave detection device and method capable of sufficiently improving the detection accuracy of pulse wave data while suppressing a calculation load.
  • FIG. 1 is a diagram illustrating an example of a configuration of a pulse wave detection device 1 according to the first embodiment.
  • the pulse wave detection device 1 includes a sensor unit 1a and a signal processing unit 1b.
  • the sensor unit 1a includes a reflective pulse wave sensor 11 that detects the pulse wave data of the subject, and an urging member 12 that closely attaches the reflective pulse wave sensor 11 between the eyebrows of the subject.
  • FIGS. 2A to 2D are diagrams illustrating an example of the configuration of the reflection type pulse wave sensor 11 of the pulse wave detection device 1 according to the first embodiment.
  • FIG. 2A is a front view of the reflection type pulse wave sensor 11 in a state before the diffusion portion 11d is provided.
  • FIG. 2B is a schematic cross-sectional view taken along line V1-V1 of FIG. 2A.
  • FIG. 2C is a front view of the reflective pulse wave sensor 11 in a state after the diffusion portion 11d is provided.
  • 2D is a schematic cross-sectional view taken along line V2-V2 of FIG. 2C.
  • the reflective pulse wave sensor 11 includes light emitting elements 11a1 and 11a2, a light receiving element 11b1, a pulse wave sensor main body 11c, and a diffusion portion 11d.
  • the light emitting elements 11a1 and 11a2 irradiate the subject with light.
  • the light receiving element 11b1 receives light emitted from the light emitting elements 11a1 and 11a2 and reflected by the subject.
  • the light receiving element 11b1 outputs pulse wave data that is a signal based on the received light.
  • the diffusion portion 11d is disposed between the light emitting elements 11a1 and 11a2 and the subject.
  • the light emitting element 11a1 is disposed on the opposite side of the light emitting element 11a2 across the light receiving element 11b1.
  • the distance between the center of the light emitting element 11a1 and the center of the light receiving element 11b1 and the distance between the center of the light receiving element 11b1 and the center of the light emitting element 11a2 are 2.54 mm.
  • parts of the same type are used as the light emitting elements 11a1 and 11a2.
  • the light emitting elements 11a1 and 11a2 are green LEDs (Light Emitting Diodes).
  • the peak wavelength of light emitted from the light emitting elements 11a1 and 11a2 is, for example, 520 to 570 [nm].
  • the light receiving element 11b1 is a photodiode or a phototransistor. As shown in FIGS. 2C and 2D, the light emitting elements 11a1 and 11a2 are covered with a diffusion portion 11d. Therefore, the light from the light emitting elements 11a1 and 11a2 is irradiated to the subject after being diffused by the diffusing unit 11d. On the other hand, the light receiving element 11b1 is not covered with the diffusion portion 11d. Therefore, the light from the subject is received by the light receiving element 11b1 without being diffused by the diffusion unit 11d. In the example shown in FIGS.
  • elements having only a light emitting function are used as the light emitting elements 11a1 and 11a2, and elements having only a light receiving function are used as the light receiving element 11b1.
  • elements for example, LEDs that selectively have both the light emitting function and the light receiving function may be used. In this example, whether to use these elements as light emitting elements or light receiving elements is appropriately selected. In this example, during the use of the sensor unit 1a, the function of these elements may be switched from the light emitting function to the light receiving function, or from the light receiving function to the light emitting function.
  • the signal processing unit 1 b of the pulse wave detection device 1 includes a used light emitting element selection unit 13, an A / D conversion unit 15, a signal analysis unit 16, and a heart rate information analysis unit 17. Yes.
  • the used light emitting element selection unit 13 selects which of the light emitting element 11a1 and the light emitting element 11a2 is used.
  • the A / D converter 15 converts the analog signal output from the light receiving element 11b1 into a digital signal.
  • the signal analysis unit 16 analyzes the signal output from the light receiving element 11b1 based on the signal from the A / D conversion unit 15. In the example shown in FIG.
  • the heart rate information analysis unit 17 includes a calculation unit 17a, a storage unit 17b, an output unit 17c, and an operation unit 17d.
  • the calculation unit 17a includes a differential calculation unit 17a1.
  • the differential calculation unit 17a1 executes differential calculation of pulse wave data that is a signal based on the light received by the light receiving element 11b1. Specifically, the differential calculation unit 17a1 performs differential calculation on the signal output from the light receiving element 11b1 and A / D converted by the A / D conversion unit 15.
  • the storage unit 17b stores the pulse wave data before the differential calculation is performed by the differential calculation unit 17a1 and the pulse wave data after the differential calculation is performed by the differential calculation unit 17a1.
  • the output unit 17 c outputs pulse wave data detected by the reflection type pulse wave sensor 11.
  • the output unit 17c includes the pulse wave data before differential calculation, which is pulse wave data before the differential calculation is performed by the differential calculation unit 17a1, and the pulse wave after the differential calculation is performed by the differential calculation unit 17a1.
  • the amplitude of the pre-differentiation pulse wave data fluctuates up and down with the subject's breathing (that is, undulation occurs).
  • the calculating part 17a calculates a pulse wave peak time based on the pulse wave data after differential calculation.
  • the output unit 17c outputs a pulse wave peak detection pulse that is a pulse indicating the pulse wave peak time calculated by the calculation unit 17a.
  • FIG. 3 is a diagram illustrating the pulse wave data before differential calculation, the pulse wave data after differential calculation, and the pulse wave peak detection pulse output by the output unit 17c of the pulse wave detection device 1 of the first embodiment.
  • the vertical axis in FIG. 3 indicates amplitude, and the horizontal axis indicates time.
  • undulation peaks of the pre-differentiation pulse wave data exist at the left end and the right end in FIG. 3.
  • the undulation valley of the pre-differentiation pulse wave data exists in the center of FIG.
  • the influence of the subject's breathing that is, the waveform undulation
  • the pulse wave peak detection pulse rises at the zero crossing time when the pulse wave data after the differential calculation is increasing.
  • the pulse wave peak detection pulse falls at the zero crossing time when the pulse wave data after the differential operation is decreasing.
  • the pulse wave detection device 1 can obtain the heart rate based on the pulse wave data before differentiation calculation, the pulse wave data after differentiation calculation, and the pulse wave peak detection pulse.
  • an autonomic nerve index suggesting the state of the autonomic nerve can be obtained by frequency analysis of heart rate variability.
  • the output unit 17 c is a display unit such as a display. In another example, instead, the output unit 17c may be a printing unit such as a printer.
  • the operation unit 17 d receives an operation by a user of the pulse wave detection device 1 such as a subject.
  • the operation unit 17d is, for example, a touch panel.
  • the operation unit 17d may be a key input type operation unit.
  • the signal processing unit 1 b including the output unit 17 c and the like is mounted on a mobile terminal such as a smartphone.
  • the output unit 17c and the operation unit 17d are configured by a touch panel display of a mobile terminal.
  • the sensor unit 1a and the signal processing unit 1b are connected via wireless communication or wired communication.
  • FIGS. 4A and 4B are diagrams illustrating a first application example of the sensor unit 1a of the pulse wave detection device 1 according to the first embodiment.
  • the reflection type pulse wave sensor 11 of the sensor unit 1a and the urging member 12 are mounted on a head mounted display.
  • 4A is a perspective view of the head mounted display as viewed from the left side
  • FIG. 4B is a perspective view of a part of the head mounted display as viewed from the upper left side and the rear side.
  • the head mounted display is a VR (virtual reality) head mounted display, which is a three-dimensional visual projection head mounted display.
  • VR virtual reality
  • the reflection type pulse wave sensor 11 is mounted at the position shown in FIG. 4B of the head mounted display.
  • the reflective pulse wave sensor 11 can be brought into close contact with the eyebrows of the subject while the subject is viewing the content displayed on the display unit of the head mounted display. Therefore, the pulse wave detection device 1 can acquire the pulse wave data of the subject while the subject is relaxing while watching the content. That is, in the example shown in FIGS. 4A and 4B, ideal pulse wave data can be acquired as compared with the case where pulse wave data is detected in a hospital or the like.
  • the pulse wave detection device 1 can acquire the pulse wave data of the subject while the subject is playing the game.
  • the biometric information and its change may reflect the stress and stimulation that the subject receives from the content in the short term. Also, changes observed over the long term (months to years or years) may reflect chronic diseases such as lifestyle-related diseases and aging.
  • the pulse wave detection device 1 uses the head-mounted display to acquire biological information regarding psychological / physiological states and health on various time scales.
  • the health management of the worker who works in the VR environment can be performed by the pulse wave detection device 1 applied to the head mounted display.
  • FIG. 5 is a diagram illustrating a second application example of the sensor unit 1a of the pulse wave detection device 1 according to the first embodiment.
  • the urging member 12 of the sensor unit 1a is, for example, a sports headband.
  • the reflection type pulse wave sensor 11 of the sensor unit 1a is mounted on the headband. That is, FIG. 5 is a perspective view of the headband as viewed from the upper left side and the rear side. In the example shown in FIG. 5, the reflection type pulse wave sensor 11 is mounted at the position shown in FIG. 5 of the headband. That is, both hands of the subject are not restrained during the period in which the pulse data is detected by the reflective pulse wave sensor 11.
  • the pulse wave detection device 1 can acquire the pulse wave data of the subject even in a state where both hands of the subject are used for other purposes.
  • the sensor unit 1a of the pulse wave detection device 1 of the first embodiment By applying the sensor unit 1a of the pulse wave detection device 1 of the first embodiment to an infant headband, the infant's pulse wave data can be easily acquired.
  • the reflection type pulse wave sensor 11 includes the light emitting element 11a1 and the light emitting element 11a2 as described above.
  • the signal analysis unit 16 analyzes the light signal received by the light receiving element 11b1.
  • the light received by the light receiving element 11b1 Both the light from 11a1 and the light from the light emitting element 11a2 are included, and the detection accuracy of the pulse wave data may be lowered.
  • the pulse wave detection device 1 of the first embodiment when the signal of the light received by the light receiving element 11b1 is analyzed by the signal analysis unit 16, light is emitted from only one of the light emitting element 11a1 and the light emitting element 11a2.
  • the used light emitting element selection unit 13 selects whether to irradiate light from the light emitting element 11a1 or to irradiate light from the light emitting element 11a2. That is, the used light emitting element selector 13 selects one of the light emitting elements 11a1 and 11a2 to be used for detecting pulse wave data.
  • the used light emitting element selection unit 13 selects the pulse wave from the light emitting element 11a1 and the light emitting element 11a2. A light emitting element used for data detection is selected.
  • the used light emitting element selection unit 13 selects a light emitting element to be used for detection of pulse wave data, for example, first, the light emitting element 11a1 emits light, and the light emitting element 11a2 does not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a1 and reflected by the subject.
  • the signal analysis unit 16 analyzes a first signal that is a light signal irradiated from the light emitting element 11a1, reflected by the subject, and received by the light receiving element 11b1. Next, the light emitting element 11a1 does not emit light, and the light emitting element 11a2 emits light. The light receiving element 11b1 receives light emitted from the light emitting element 11a2 and reflected by the subject. The signal analysis unit 16 analyzes a second signal that is a light signal irradiated from the light emitting element 11a2, reflected by the subject, and received by the light receiving element 11b1. Next, the used light emitting element selection unit 13 selects a light emitting element to be used for detection of pulse wave data based on the first signal and the second signal.
  • the used light emitting element selection unit 13 selects the light emitting element 11a1 as the light emitting element used for detecting the pulse wave data.
  • the used light emitting element selection unit 13 selects the light emitting element 11a2 as the light emitting element used for detecting the pulse wave data.
  • FIGS. 6A and 6B are diagrams for explaining an example in which the used light emitting element selection unit 13 of the pulse wave detection device 1 of the first embodiment selects a light emitting element to be used for detecting pulse wave data.
  • FIG. 6A shows that the reflective pulse wave sensor 11 is closely attached to the eyebrow A1 of the subject A so that the artery (or artery group) A1a of the eyebrow A1 of the subject A is located near the light emitting element 11a1.
  • 6B is a schematic diagram showing a state in which the reflective pulse wave sensor 11 is in close contact with the eyebrow A1 of the subject A so that the artery (or a group of arteries) A1a of the eyebrow A1 of the subject A is positioned near the light emitting element 11a2. It is sectional drawing.
  • the artery A1a of the eyebrow A1 of the subject A is a light emitting element.
  • the reflective pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so as to be located near 11a1. Therefore, the first signal, which is a light signal irradiated from the light emitting element 11a1, reflected by the subject A, and received by the light receiving element 11b1, is irradiated from the light emitting element 11a2, reflected by the subject A, and received by the light receiving element 11b1. It is more suitable as pulse wave data than the second signal, which is a light signal. As a result, the used light emitting element selection unit 13 selects the light emitting element 11a1 as the light emitting element used for detecting the pulse wave data.
  • the artery A1a of the eyebrow A1 of the subject A is a light emitting element.
  • the reflective pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so as to be positioned near 11a2. Therefore, the second signal, which is a light signal irradiated from the light emitting element 11a2, reflected by the subject A, and received by the light receiving element 11b1, is irradiated from the light emitting element 11a1, reflected by the subject A, and received by the light receiving element 11b1. It is more suitable as pulse wave data than the first signal which is a light signal. As a result, the used light emitting element selection unit 13 selects the light emitting element 11a2 as the light emitting element used for detecting the pulse wave data.
  • the light irradiated from either the light emitting element 11a1 or the light emitting element 11a2 and reflected by the subject A is the light receiving element 11b1. Is received by.
  • the pulse wave detection device 1 of the first embodiment instead, the light received from both the light emitting element 11a1 and the light emitting element 11a2 and reflected by the subject A is received by the light receiving element 11b1. May be. That is, in another example to which the pulse wave detection device 1 of the first embodiment is applied, light that is irradiated from a plurality of light emitting elements and reflected by the subject A may be received by one light receiving element.
  • FIG. 7 is a flowchart showing processing executed in the pulse wave detection method by the pulse wave detection device 1 of the first embodiment.
  • step S1 the reflection type pulse wave sensor 11 is brought into close contact with the eyebrow A1 of the subject A by the subject A himself or by an assistant.
  • step S2 the used light emitting element selection unit 13 selects the light emitting element 11a1 or the light emitting element 11a2 as a light emitting element used for detection of pulse wave data.
  • the light emitting element selected by the used light emitting element selection unit 13 irradiates the subject A with light.
  • step S3 the light receiving element 11b1 receives light emitted from the light emitting element selected by the used light emitting element selecting unit 13 and reflected by the subject A. Further, the pulse wave detection device 1 detects pulse wave data that is a signal based on the light received by the light receiving element 11b1.
  • the pulse wave detection device 1 has been described above.
  • the pulse wave detection device 1 of the first embodiment includes light emitting elements 11a1 and 11a2 that irradiate the subject A with light, and a light receiving element 11b1 that receives the light that is emitted from the light emitting elements 11a1 and 11a2 and reflected by the subject A.
  • the pulse wave detection device 1 can improve the detection accuracy of the pulse wave data as compared with the case where the reflective pulse wave sensor 11 cannot be brought into close contact with the eyebrows A1 of the subject A. Moreover, the pulse wave detection apparatus 1 can suppress a calculation load compared with the case where the pulse wave sensor which has a camera is used. Further, the pulse wave detection device 1 can improve the detection accuracy of the pulse wave data as compared with the case where the muscle mass around the blood vessel to be detected by the pulse wave sensor is large. In addition, since the reflection type pulse wave sensor 11 is brought into close contact with the eyebrow A1 of the subject A, the pulse wave detection device 1 can suppress the effect of the blink on the right eye of the subject A, and the blink on the left eye of the subject A. The influence of the eyes can be suppressed.
  • the light emitting elements 11a1 and 11a2 are green LEDs. With this configuration, the pulse wave detection device 1 can increase the amount of light received by the light receiving element 11b1 as compared with the case where infrared light is emitted from the light emitting element, and the pulse wave data detection accuracy can be increased. Can be improved.
  • the reflection type pulse wave sensor 11 further includes a diffusing unit 11d disposed between the light emitting elements 11a1 and 11a2 and the subject A.
  • the pulse wave detection device 1 can detect the light emitted from the light emitting elements 11a1 and 11a2 even when the blood vessel to be detected by the pulse wave data does not exist on the optical axis of the light emitting elements 11a1 and 11a2. Can reach the blood vessel to be detected by the pulse wave data, and the pulse wave data can be detected.
  • the pulse wave detection device 1 further includes a differential operation unit 17a1 that performs a differential operation of a signal based on the light received by the light receiving element 11b1.
  • the pulse wave detection device 1 can exclude the influence of the breathing of the subject A from the signal based on the light received by the light receiving element 11b1. That is, the pulse wave detection device 1 can obtain pulse wave data from which the influence of the subject A's respiration is excluded.
  • the pulse wave detection device 1 further includes an output unit 17 c that outputs pulse wave data detected by the reflection type pulse wave sensor 11. .
  • the output unit 17c is mounted on the mobile terminal. With this configuration, the pulse wave detection device 1 allows the user of the pulse wave detection device 1 to access the pulse wave data, compared to the case where the output unit 17c that outputs the pulse wave data is not mounted on the mobile terminal. It can be made easier.
  • the reflection type pulse wave sensor 11 and the urging member 12 are mounted on a head mounted display.
  • the pulse wave detection device 1 is configured so that the reflection pulse wave sensor 11 is between the eyebrows A1 of the subject A while the subject A is viewing the content displayed on the display unit of the head mounted display. Can be adhered to. Therefore, the pulse wave detection device 1 can acquire the pulse wave data of the subject A while the subject A is relaxing while viewing the content. That is, ideal pulse wave data can be acquired compared to the case where pulse wave data is detected in a hospital or the like.
  • the urging member 12 is, for example, a headband.
  • the pulse wave detection device 1 can acquire the pulse wave data of the subject A even in a state where both hands of the subject A are used for other purposes.
  • the reflection type pulse wave sensor 11 includes a light emitting element 11a1 and a light emitting element 11a2. Further, the pulse wave detection device 1 further includes a signal analysis unit 16 and a used light emitting element selection unit 13.
  • the signal analysis unit 16 analyzes the light signal received by the light receiving element 11b1.
  • the light emitting element selection unit 13 uses the first signal, which is a light signal received by the light receiving element 11b1 when light is emitted from the light emitting element 11a1, and the light receiving element 11b1 when light is emitted from the light emitting element 11a2. Based on the second signal which is a signal of the light received by, a light emitting element used for detection of pulse wave data is selected.
  • the pulse wave detection device 1 of the first embodiment when the first signal is more suitable as pulse wave data than the second signal, the light emitting element selection unit 13 uses the pulse wave data.
  • the first light emitting element 11a1 is selected as the light emitting element used for detection.
  • the used light emitting element selection unit 13 selects the second light emitting element 11a2 as the light emitting element used for detecting the pulse wave data.
  • the pulse wave detection device 1 has a pulse wave when the light received by the light receiving element 11b1 includes both the light from the light emitting element 11a1 and the light from the light emitting element 11a2. The possibility that the detection accuracy of data is lowered can be suppressed.
  • the pulse wave detection device 1 of the second embodiment is configured in the same manner as the pulse wave detection device 1 of the first embodiment, except for the points described below. Therefore, according to the pulse wave detection device 1 of the second embodiment, the same effects as those of the pulse wave detection device 1 of the first embodiment can be obtained except for the points described below.
  • FIG. 8 is a diagram illustrating an example of the configuration of the pulse wave detection device 1 according to the second embodiment.
  • the reflection type pulse wave sensor 11 includes the light emitting elements 11a1 and 11a2, but the pulse wave detection device 1 of the second embodiment is applied.
  • the reflection type pulse wave sensor 11 includes light emitting elements 11a1, 11a2, 11a3, and 11a4.
  • FIG. 9A and FIG. 9B are diagrams illustrating an example of the configuration of the reflection type pulse wave sensor 11 of the pulse wave detection device 1 according to the second embodiment.
  • FIG. 9A is a front view of the reflective pulse wave sensor 11 in a state before the diffusing portion 11d is provided.
  • FIG. 9B is a front view of the reflective pulse wave sensor 11 in a state after the diffusing portion 11d is provided.
  • the reflective pulse wave sensor 11 includes light emitting elements 11a1, 11a2, 11a3, 11a4, a light receiving element 11b1, a pulse wave sensor main body 11c, and a diffusion portion 11d.
  • the light emitting elements 11a1 to 11a4 irradiate the subject with light.
  • the light receiving element 11b1 receives light emitted from the light emitting elements 11a1 to 11a4 and reflected by the subject.
  • the light receiving element 11b1 outputs pulse wave data that is a signal based on the received light.
  • the diffusion portion 11d is disposed between the light emitting elements 11a1 to 11a4 and the subject.
  • the light emitting elements 11a3 and 11a4 are arranged at positions obtained by rotating the light emitting elements 11a1 and 11a2 by 90 ° around the light receiving element 11b1.
  • parts of the same type are used as the light emitting elements 11a1 to 11a4.
  • the light emitting elements 11a1 to 11a4 are covered with a diffusion portion 11d. Therefore, the light from the light emitting elements 11a1 to 11a4 is irradiated to the subject after being diffused by the diffusion part 11d.
  • the light receiving element 11b1 is not covered with the diffusion portion 11d. Therefore, the light from the subject is received by the light receiving element 11b1 without being diffused by the diffusion unit 11d.
  • the used light emitting element selection unit 13 selects which of the light emitting element 11a1 and the light emitting element 11a2 is used. .
  • the used light emitting element selection unit 13 is any of the light emitting element 11a1, the light emitting element 11a2, the light emitting element 11a3, and the light emitting element 11a4. Select whether to use.
  • the pulse wave detection device 1 when the signal of the light received by the light receiving element 11b1 is analyzed by the signal analysis unit 16, light is emitted from only one of the light emitting element 11a1 and the light emitting element 11a2. Is irradiated.
  • the used light emitting element selection unit 13 selects whether to irradiate light from the light emitting element 11a1 or to irradiate light from the light emitting element 11a2.
  • the pulse wave detection device 1 of the second embodiment when the signal of the light received by the light receiving element 11b1 is analyzed by the signal analysis unit 16, the light emitting element 11a1, the light emitting element 11a2, the light emitting element 11a3, and the light emission Light is emitted from only one of the elements 11a4. Further, the used light emitting element selection unit 13 irradiates light from the light emitting element 11a1, irradiates light from the light emitting element 11a2, irradiates light from the light emitting element 11a3, or irradiates light from the light emitting element 11a4. Choose.
  • the used light emitting element selection unit 13 selects the pulse wave data from the light emitting elements 11a1 to 11a4. A light emitting element used for detection is selected.
  • the used light emitting element selection unit 13 selects a light emitting element used for detecting pulse wave data, for example, First
  • the light emitting element 11a1 emits light
  • the light emitting elements 11a2, 11a3, and 11a4 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a1 and reflected by the subject.
  • the signal analysis unit 16 analyzes a first signal that is a light signal irradiated from the light emitting element 11a1, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a2 emits light, and the light emitting elements 11a1, 11a3, and 11a4 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a2 and reflected by the subject.
  • the signal analysis unit 16 analyzes a second signal that is a light signal irradiated from the light emitting element 11a2, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a3 emits light, and the light emitting elements 11a1, 11a2, and 11a4 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a3 and reflected by the subject.
  • the signal analysis unit 16 analyzes a third signal that is a signal of light emitted from the light emitting element 11a3, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a4 emits light, and the light emitting elements 11a1, 11a2, and 11a3 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a4 and reflected by the subject.
  • the signal analysis unit 16 analyzes a fourth signal that is a light signal emitted from the light emitting element 11a4, reflected by the subject, and received by the light receiving element 11b1.
  • the used light emitting element selection unit 13 selects a light emitting element used for detecting pulse wave data based on the first signal, the second signal, the third signal, and the fourth signal. Specifically, when the first signal is more suitable as pulse wave data than the second signal, the third signal, and the fourth signal, the light emitting element selection unit 13 uses the light emitting element used for detecting the pulse wave data. The light emitting element 11a1 is selected. When the second signal is more suitable as pulse wave data than the first signal, the third signal, and the fourth signal, the light emitting element selection unit 13 uses the light emitting element 11a2 as a light emitting element used for detecting the pulse wave data. Select.
  • the light emitting element selection unit 13 uses the light emitting element 11a3 as a light emitting element used for detecting the pulse wave data. Select.
  • the light emitting element selection unit 13 uses the light emitting element 11a4 as a light emitting element used for detecting the pulse wave data. Select.
  • the pulse wave detection device 1 of the third embodiment is configured in the same manner as the pulse wave detection device 1 of the first embodiment, except for the points described below. Therefore, according to the pulse wave detection device 1 of the third embodiment, the same effects as those of the pulse wave detection device 1 of the first embodiment can be obtained except for the points described below.
  • FIG. 10 is a diagram illustrating an example of the configuration of the pulse wave detection device 1 according to the third embodiment.
  • the reflection type pulse wave sensor 11 includes the light emitting elements 11a1 and 11a2, but the pulse wave detection device 1 of the third embodiment is applied.
  • the reflection type pulse wave sensor 11 includes light emitting elements 11a1, 11a2, 11a3, 11a4, 11a5, 11a6, 11a7, 11a8, and 11a9. Further, in the example shown in FIG.
  • the reflection type pulse wave sensor 11 includes the light receiving element 11b1, but the pulse wave detection device 1 of the third embodiment is applied.
  • the reflection type pulse wave sensor 11 has light receiving elements 11b1, 11b2, 11b3, and 11b4.
  • FIG. 11A and FIG. 11B are diagrams illustrating an example of the configuration of the reflection type pulse wave sensor 11 of the pulse wave detection device 1 according to the third embodiment.
  • FIG. 11A is a front view of the reflective pulse wave sensor 11 in a state before the diffusing portion 11d is provided.
  • FIG. 11B is a front view of the reflective pulse wave sensor 11 in a state after the diffusing portion 11d is provided. In the example shown in FIGS.
  • the reflection type pulse wave sensor 11 includes light emitting elements 11a1, 11a2, 11a3, 11a4, 11a5, 11a6, 11a7, 11a8, 11a9, and light receiving elements 11b1, 11b2, 11b3, 11b4, It has a pulse wave sensor main body 11c and a diffusion part 11d.
  • the light emitting elements 11a1 to 11a9 irradiate the subject with light.
  • the light receiving elements 11b1 to 11b4 receive light emitted from the light emitting elements 11a1 to 11a9 and reflected by the subject.
  • the light receiving elements 11b1 to 11b4 output pulse wave data that is a signal based on the received light.
  • the diffusion portion 11d is disposed between the light emitting elements 11a1 to 11a9 and the subject.
  • the light emitting element 11a6 is disposed on the opposite side of the light emitting element 11a1 across the light receiving element 11b1.
  • the light receiving element 11b2 is disposed on the opposite side of the light receiving element 11b1 across the light emitting element 11a6.
  • the light emitting element 11a2 is disposed on the opposite side of the light emitting element 11a6 across the light receiving element 11b2.
  • the light emitting elements 11a5 and 11a7 and the light receiving elements 11b3 and 11b4 are arranged at positions where the light emitting elements 11a1 and 11a2 and the light receiving elements 11b1 and 11b2 are rotated by 90 ° around the light emitting element 11a6.
  • the light emitting elements 11a3 and 11a4 are arranged at positions obtained by rotating the light emitting elements 11a1 and 11a6 by 90 ° around the light receiving element 11b1.
  • the light emitting elements 11a8 and 11a9 are arranged at positions obtained by rotating the light emitting elements 11a6 and 11a2 by 90 ° around the light receiving element 11b2.
  • parts of the same type are used as the light emitting elements 11a1 to 11a9. Parts of the same type are used as the light receiving elements 11b1 to 11b4.
  • the light emitting elements 11a1 to 11a9 are covered with a diffusion portion 11d. Therefore, the light from the light emitting elements 11a1 to 11a9 is diffused by the diffusing unit 11d and then irradiated to the subject.
  • the light receiving elements 11b1 to 11b4 are not covered with the diffusion portion 11d. Therefore, light from the subject is received by the light receiving elements 11b1 to 11b4 without being diffused by the diffusing unit 11d.
  • the used light emitting element selection unit 13 selects which of the light emitting element 11 a 1 and the light emitting element 11 a 2 is to be used.
  • the used light emitting element selection unit 13 selects which of the light emitting elements 11a1 to 11a9 to use.
  • the signal processing unit 1 b of the pulse wave detection device 1 since the reflection type pulse wave sensor 11 has only one light receiving element 11 b 1, the signal processing unit 1 b of the pulse wave detection device 1 does not include the used light receiving element selection unit 14. On the other hand, in the example shown in FIG. 10, since the reflection type pulse wave sensor 11 has a plurality of light receiving elements 11b1 to 11b4, the signal processing unit 1b of the pulse wave detecting device 1 includes the use light receiving element selecting unit 14. The light receiving element selection unit 14 selects which of the light receiving elements 11b1 to 11b4 is to be used.
  • the signal analysis unit 16 analyzes the signal output from the light receiving element 11b1.
  • the signal analysis unit 16 outputs the signal output from the light receiving element 11b1, the signal output from the light receiving element 11b2, the signal output from the light receiving element 11b3, and the output from the light receiving element 11b4. And the analyzed signal.
  • the pulse wave detection device 1 of the first embodiment when the signal of the light received by the light receiving element 11b1 is analyzed by the signal analysis unit 16, the light emitting element 11a1 and the light emitting element 11a2 Light is irradiated from only one of them.
  • the used light emitting element selection unit 13 selects whether to irradiate light from the light emitting element 11a1 or to irradiate light from the light emitting element 11a2.
  • the pulse wave detection device 1 of the third embodiment when the signal of the light received by the light receiving element 11b1 is analyzed by the signal analysis unit 16, the light emitting element 11a1 adjacent to the light receiving element 11b1, Light is emitted from any one of the light emitting element 11a3, the light emitting element 11a4, and the light emitting element 11a6. Further, the used light emitting element selection unit 13 irradiates light from the light emitting element 11a1, irradiates light from the light emitting element 11a3, irradiates light from the light emitting element 11a4, or irradiates light from the light emitting element 11a6. Choose.
  • the pulse wave detection device 1 of the third embodiment when the signal of the light received by the light receiving element 11b2 is analyzed by the signal analysis unit 16, the light emitting element 11a2 adjacent to the light receiving element 11b2, Light is emitted only from any one of the light emitting element 11a6, the light emitting element 11a8, and the light emitting element 11a9. Further, the used light emitting element selection unit 13 emits light from the light emitting element 11a2, emits light from the light emitting element 11a6, emits light from the light emitting element 11a8, or emits light from the light emitting element 11a9. Choose.
  • the pulse wave detection device 1 of the third embodiment when the signal of the light received by the light receiving element 11b3 is analyzed by the signal analysis unit 16, the light emitting element 11a3 adjacent to the light receiving element 11b3, Light is irradiated from any one of the light emitting element 11a5, the light emitting element 11a6, and the light emitting element 11a8. Further, the used light emitting element selector 13 emits light from the light emitting element 11a3, emits light from the light emitting element 11a5, emits light from the light emitting element 11a6, or emits light from the light emitting element 11a8. Select.
  • the pulse wave detection device 1 of the third embodiment when the signal of the light received by the light receiving element 11b4 is analyzed by the signal analysis unit 16, the light emitting element 11a4 adjacent to the light receiving element 11b4, Light is emitted only from any one of the light emitting element 11a6, the light emitting element 11a7, and the light emitting element 11a9.
  • the used light emitting element selection unit 13 emits light from the light emitting element 11a4, emits light from the light emitting element 11a6, emits light from the light emitting element 11a7, or emits light from the light emitting element 11a9. Choose.
  • the light emitting element selection unit 13 uses the light emitting elements 11a1 to 11a9. The light emitting element used for detecting the pulse wave data is selected. Further, before the pulse wave detection device 1 executes detection of pulse wave data, the used light receiving element selection unit 14 selects a light receiving element used for detecting pulse wave data from the light receiving elements 11b1 to 11b4. .
  • the used light emitting element selection unit 13 selects the light emitting element used for detecting the pulse wave data, and selects the used light receiving element.
  • the unit 14 selects a light receiving element used for detecting pulse wave data, for example, first, the light emitting element 11a1 emits light, and the light emitting elements 11a2 to 11a9 do not emit light.
  • the light receiving element 11b1 adjacent to the light emitting element 11a1 receives light emitted from the light emitting element 11a1 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a1-b1 signal that is a light signal irradiated from the light emitting element 11a1, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a3 adjacent to the light receiving element 11b1 emits light, and the light emitting elements 11a1, 11a2, 11a4 to 11a9 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a3 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a3-b1 signal, which is a light signal that is emitted from the light emitting element 11a3, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a4 adjacent to the light receiving element 11b1 emits light, and the light emitting elements 11a1 to 11a3 and 11a5 to 11a9 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a4 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a4-b1 signal that is a light signal irradiated from the light emitting element 11a4, reflected by the subject, and received by the light receiving element 11b1.
  • the light emitting element 11a6 adjacent to the light receiving element 11b1 emits light, and the light emitting elements 11a1 to 11a5 and 11a7 to 11a9 do not emit light.
  • the light receiving element 11b1 receives light emitted from the light emitting element 11a6 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a6-b1 signal that is a light signal irradiated from the light-emitting element 11a6, reflected by the subject, and received by the light-receiving element 11b1.
  • the light emitting element 11a2 emits light, and the light emitting elements 11a1, 11a3 to 11a9 do not emit light.
  • the light receiving element 11b2 adjacent to the light emitting element 11a2 receives light emitted from the light emitting element 11a2 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a2-b2 signal, which is a signal of light emitted from the light emitting element 11a2, reflected by the subject, and received by the light receiving element 11b2.
  • the light emitting element 11a6 adjacent to the light receiving element 11b2 emits light, and the light emitting elements 11a1 to 11a5 and 11a7 to 11a9 do not emit light.
  • the light receiving element 11b2 receives light emitted from the light emitting element 11a6 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a6-b2 signal that is a light signal irradiated from the light emitting element 11a6, reflected by the subject, and received by the light receiving element 11b2.
  • the light emitting element 11a8 adjacent to the light receiving element 11b2 emits light, and the light emitting elements 11a1 to 11a7 and 11a9 do not emit light.
  • the light receiving element 11b2 receives light emitted from the light emitting element 11a8 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a8-b2 signal that is a light signal emitted from the light emitting element 11a8, reflected by the subject, and received by the light receiving element 11b2.
  • the light emitting element 11a9 adjacent to the light receiving element 11b2 emits light, and the light emitting elements 11a1 to 11a8 do not emit light.
  • the light receiving element 11b2 receives light emitted from the light emitting element 11a9 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a9-b2 signal that is a light signal irradiated from the light emitting element 11a9, reflected by the subject, and received by the light receiving element 11b2.
  • the light emitting element 11a3 emits light, and the light emitting elements 11a1, 11a2, and 11a4 to 11a9 do not emit light.
  • the light receiving element 11b3 adjacent to the light emitting element 11a3 receives light emitted from the light emitting element 11a3 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a3-b3 signal that is a light signal irradiated from the light emitting element 11a3, reflected by the subject, and received by the light receiving element 11b3.
  • the light emitting element 11a5 adjacent to the light receiving element 11b3 emits light, and the light emitting elements 11a1 to 11a4 and 11a6 to 11a9 do not emit light.
  • the light receiving element 11b3 receives light emitted from the light emitting element 11a5 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a5-b3 signal that is a light signal emitted from the light emitting element 11a5, reflected by the subject, and received by the light receiving element 11b3.
  • the light emitting element 11a6 adjacent to the light receiving element 11b3 emits light, and the light emitting elements 11a1 to 11a5 and 11a7 to 11a9 do not emit light.
  • the light receiving element 11b3 receives light emitted from the light emitting element 11a6 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a6-b3 signal that is a light signal irradiated from the light emitting element 11a6, reflected by the subject, and received by the light receiving element 11b3.
  • the light emitting element 11a8 adjacent to the light receiving element 11b3 emits light, and the light emitting elements 11a1 to 11a7 and 11a9 do not emit light.
  • the light receiving element 11b3 receives light emitted from the light emitting element 11a8 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a8-b3 signal that is a light signal irradiated from the light emitting element 11a8, reflected by the subject, and received by the light receiving element 11b3.
  • the light emitting element 11a4 emits light, and the light emitting elements 11a1 to 11a3 and 11a5 to 11a9 do not emit light.
  • the light receiving element 11b4 adjacent to the light emitting element 11a4 receives light emitted from the light emitting element 11a4 and reflected by the subject.
  • the signal analysis unit 16 analyzes an a4-b4 signal that is a light signal irradiated from the light emitting element 11a4, reflected by the subject, and received by the light receiving element 11b4.
  • the light emitting element 11a6 adjacent to the light receiving element 11b4 emits light, and the light emitting elements 11a1 to 11a5 and 11a7 to 11a9 do not emit light.
  • the light receiving element 11b4 receives light emitted from the light emitting element 11a6 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a6-b4 signal, which is a light signal irradiated from the light emitting element 11a6, reflected by the subject, and received by the light receiving element 11b4.
  • the light emitting element 11a7 adjacent to the light receiving element 11b4 emits light, and the light emitting elements 11a1 to 11a6, 11a8, and 11a9 do not emit light.
  • the light receiving element 11b4 receives light emitted from the light emitting element 11a7 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a7-b4 signal, which is a light signal irradiated from the light emitting element 11a7, reflected by the subject, and received by the light receiving element 11b4.
  • the light emitting element 11a9 adjacent to the light receiving element 11b4 emits light, and the light emitting elements 11a1 to 11a8 do not emit light.
  • the light receiving element 11b4 receives light emitted from the light emitting element 11a9 and reflected by the subject.
  • the signal analysis unit 16 analyzes the a9-b4 signal that is a light signal that is emitted from the light emitting element 11a9, reflected by the subject, and received by the light receiving element 11b4.
  • the used light-emitting element selector 13 and the used light-receiving element selector 14 are connected to the a1-b1 signal, the a3-b1 signal, the a4-b1 signal, the a6-b1 signal, the a2-b2 signal, and the a6-b2 signal.
  • Signal, a8-b2 signal, a9-b2 signal, a3-b3 signal, a5-b3 signal, a6-b3 signal, a8-b3 signal, a4-b4 signal, and a6-b4 signal Based on the a7-b4 signal and the a9-b4 signal, the light emitting element and the light receiving element used for detecting the pulse wave data are selected.
  • the used light emitting element selection unit 13 and the used light receiving element selection unit 14 have the most signals as pulse wave data.
  • a suitable light emitting element and light receiving element combination is selected.
  • the used light emitting element selection unit 13 selects the light emitting element 11a1 as the light emitting element used for detecting the pulse wave data
  • the used light receiving element selection unit. 14 selects the light receiving element 11b1 as the light receiving element used for detecting the pulse wave data.
  • the used light emitting element selecting unit 13 selects the light emitting element 11a9 as the light emitting element used for detecting the pulse wave data
  • the used light receiving element selecting unit. 14 selects the light receiving element 11b4 as the light receiving element used for detecting the pulse wave data.
  • the used light emitting element selection unit 13 of the pulse wave detection device 1 of the third embodiment selects a light emitting element used for detection of pulse wave data
  • the used light receiving element selection unit 14 uses pulse wave data.
  • FIG. 12A shows that the reflection type pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so that the artery (or a group of arteries) A1a of the eyebrows A1 of the subject A is located near the light emitting element 11a1.
  • FIG. 12A shows that the reflection type pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so that the artery (or a group of arteries) A1a of the eyebrows A1 of the subject A is located near the light emitting element 11a1.
  • FIG. 12A shows that the reflection type pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so that the artery (or a group of arteries) A1a of the eyebrows A1 of the subject A is located near the light emitting element 11a1.
  • FIG. 12B is a schematic diagram showing a state in which the reflective pulse wave sensor 11 is closely attached to the eyebrow A1 of the subject A so that the artery (or a group of arteries) A1a of the eyebrow A1 of the subject A is located near the light emitting element 11a2. It is sectional drawing.
  • the artery A1a of the eyebrow A1 of the subject A is a light emitting element.
  • the reflective pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so as to be located near 11a1.
  • the a1-b1 signal which is a light signal emitted from the light emitting element 11a1, reflected by the subject A, and received by the light receiving element 11b1, is most suitable as pulse wave data.
  • the used light emitting element selection unit 13 selects the light emitting element 11a1 as a light emitting element used for detection of pulse wave data, and the used light receiving element selection unit 14 serves as a light receiving element used for detection of pulse wave data.
  • the light receiving element 11b1 is selected.
  • the artery A1a of the eyebrow A1 of the subject A is a light emitting element.
  • the reflective pulse wave sensor 11 is brought into close contact with the eyebrows A1 of the subject A so as to be positioned near 11a2.
  • the a2-b2 signal which is a light signal irradiated from the light emitting element 11a2, reflected by the subject A, and received by the light receiving element 11b2, is most suitable as pulse wave data.
  • the used light emitting element selection unit 13 selects the light emitting element 11a2 as a light emitting element used for detecting pulse wave data, and the used light receiving element selecting unit 14 serves as a light receiving element used for detecting pulse wave data.
  • the light receiving element 11b2 is selected.
  • the reflection type pulse wave sensor 11 includes light emitting elements 11a1 to 11a9 and light receiving elements 11b1 to 11b4.
  • the light emitting elements 11a3 to 11a9 and the light receiving elements 11b3 and 11b4 shown in FIG. 11A may be omitted. That is, in this example, the reflection type pulse wave sensor 11 includes light emitting elements 11a1 and 11a2 and light receiving elements 11b1 and 11b2.
  • the signal analysis unit 16 analyzes the light signal received by the light receiving element 11b1 and the light signal received by the light receiving element 11b2.
  • the light emitting element selection unit 13 uses the a1-b1 signal, which is a light signal received by the light receiving element 11b1 when light is emitted from the light emitting element 11a1, and the light receiving element when light is emitted from the light emitting element 11a2. Based on the a2-b2 signal, which is a light signal received by 11b2, a light emitting element used for detection of pulse wave data is selected. Based on the a1-b1 signal and the a2-b2 signal, the used light receiving element selection unit 14 selects a light receiving element used for detecting pulse wave data.
  • the used light emitting element selection unit 13 when the a1-b1 signal is more suitable as pulse wave data than the a2-b2 signal, the used light emitting element selection unit 13 emits light as a light emitting element used for detection of pulse wave data.
  • the element 11a1 is selected, and the used light receiving element selection unit 14 selects the light receiving element 11b1 as the light receiving element used for detecting the pulse wave data.
  • the used light emitting element selection unit 13 selects the light emitting element 11a2 as the light emitting element used for detecting the pulse wave data, and uses the received light
  • the element selection unit 14 selects the light receiving element 11b2 as a light receiving element used for detection of pulse wave data.
  • the pulse wave detection device 1 detects the accuracy of detecting pulse wave data because the light received by the light receiving element 11b1 includes both the light from the light emitting element 11a1 and the light from the light emitting element 11a2.
  • the light received by the light receiving element 11b2 includes both the light from the light emitting element 11a1 and the light from the light emitting element 11a2, and thus the pulse wave. The possibility that the detection accuracy of data is lowered can be suppressed.
  • the light emitted from the light emitting element 11a1 and reflected by the subject A is either the light receiving element 11b1 or the light receiving element 11b2. Is received by the light receiving element 11b1).
  • the pulse wave detection device 1 of the third embodiment instead, the light emitted from the light emitting element 11a1 and reflected by the subject A is received by both the light receiving element 11b1 and the light receiving element 11b2. May be. That is, in another example to which the pulse wave detection device 1 of the third embodiment is applied, instead of receiving the light emitted from one light emitting element and reflected by the subject A by a plurality of light receiving elements. Good.
  • pulse wave data based on light received by a certain light receiving element and pulse based on light received by another light receiving element.
  • the wave data is added and output from the output unit 17c as pulse wave data detected by the reflective pulse wave sensor 11.
  • the pulse wave detection device 1 of the third embodiment instead of receiving light reflected from the subject A and received from a plurality of light emitting elements simultaneously by a plurality of light receiving elements. Good.
  • pulse wave detection device 1 in the above embodiment may be realized by dedicated hardware, or may be realized by a memory and a microprocessor.
  • the whole or a part of the pulse wave detection device 1 is constituted by a memory and a CPU (central processing unit), and the program for realizing the function of each unit included in each system is loaded into the memory and executed. A function may be realized.
  • a program for realizing all or part of the functions of the pulse wave detection device 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may process each part by.
  • the “computer system” includes an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • SYMBOLS 1 Pulse wave detection apparatus, 1a ... Sensor part, 1b ... Signal processing part, 11 ... Reflection type pulse wave sensor, 11a1, 11a2, 11a3, 11a4, 11a5, 11a6, 11a7, 11a8, 11a9 ... Light emitting element, 11b1, 11b2 11b3, 11b4 ... light receiving element, 11c ... pulse wave sensor body, 11d ... diffusing part, 12 ... biasing member, 13 ... used light emitting element selecting part, 14 ... used light receiving element selecting part, 15 ... A / D converting part, DESCRIPTION OF SYMBOLS 16 ... Signal analysis part, 17 ... Heart rate information analysis part, 17a ... Calculation part, 17a1 ... Differential calculation part, 17b ... Memory

Abstract

La présente invention concerne un dispositif de détection d'onde d'impulsion comprenant : un capteur d'onde d'impulsion de type réflexion ayant un élément d'émission de lumière qui projette de la lumière sur un sujet d'essai, et un élément de réception de lumière qui reçoit la lumière projetée depuis l'élément d'émission de lumière et réfléchie par le sujet d'essai ; et un élément de déviation qui amène le capteur d'onde d'impulsion de type réflexion à être en contact étroit avec le front du sujet d'essai.
PCT/JP2018/003637 2017-02-13 2018-02-02 Dispositif et procédé de détection d'onde d'impulsion WO2018147192A1 (fr)

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