WO2018142865A1 - Pulse measurement device, wearable device, and pulse measurement method - Google Patents
Pulse measurement device, wearable device, and pulse measurement method Download PDFInfo
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- WO2018142865A1 WO2018142865A1 PCT/JP2018/000390 JP2018000390W WO2018142865A1 WO 2018142865 A1 WO2018142865 A1 WO 2018142865A1 JP 2018000390 W JP2018000390 W JP 2018000390W WO 2018142865 A1 WO2018142865 A1 WO 2018142865A1
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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
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
Definitions
- the present invention relates to a pulse measurement technique using light.
- Patent Document 1 discloses a photoelectric pulse measuring device.
- the photoelectric pulse measuring device irradiates a human body with light and measures the pulse by utilizing the difference in absorbance due to blood pulsation.
- Such a photoelectric pulse measuring device is widely used in wearable devices such as smart watches.
- a wearable device having a photoelectric pulse measuring device is configured such that a light emitting unit that emits light is in close contact with the human body when the device is worn. However, if the light emitting unit that emits light does not come into close contact with the human body due to the movement of the person wearing the wearable device or the like, the pulse reading may become unstable.
- the pulse measurement device transmits light having a polarization plane different from the polarization plane of the regular reflection light of the light emitted by the light emission means and the light emission means that irradiates the light having the first polarization plane.
- FIG. 1 shows a state in which the pulse measuring device is in close contact with the human body 1.
- the light emitting unit 2 emits light
- the light receiving unit 3 receives reflected light of the light emitted by the light emitting unit 2 and outputs a signal corresponding to the received light intensity.
- a determination unit (not shown) in FIG. 1 determines the pulse based on the output signal of the light receiving unit 3.
- one light receiving unit 3 and one light emitting unit 2 are provided, but a plurality of light receiving units 3 and two light emitting units 2 may be provided.
- FIG. 2 is a graph showing the absorbance of blood hemoglobin.
- hemoglobin exists as oxyhemoglobin (HbO2) combined with oxygen, and has a wavelength of 650 to 850 nm, that is, a large absorbance of infrared light. Since the amount of blood flowing through the artery changes due to the heartbeat, the amount of light absorption also changes according to the pulse.
- the light emitting unit 2 of the pulse measuring device emits, for example, infrared light having a high absorbance of HbO2, and the light receiving unit 3 detects reflected light inside the human body. The intensity of the reflected light from the inside of the human body received by the light receiving unit 3 changes according to the pulsation due to the fluctuation of the light absorption due to the pulsation. can do.
- FIG. 3 is a photograph of the hand part of a human body obtained by irradiating infrared rays and acquired by an infrared camera. The hand is completely white due to total reflection.
- what is important for measuring the pulse is only the so-called deep reflected light that is scattered and reflected by the artery inside the human body.
- the light receiving unit 3 mainly receives regular reflection light on the skin surface.
- FIG. 6 shows deep reflection light and regular reflection light on the skin surface when the pulse measurement device is not in close contact with the human body. As shown in FIG.
- the light emitting part 2 In order to suppress specular reflection light on the skin surface, it is necessary to make at least the light emitting part 2 in close contact with the human body. However, there may be a gap between the light emitting part 2 and the human body due to body movement or the structure of the pulse measuring device or the wearable terminal equipped with the body movement. In this case, the pulse is measured by the total reflected light on the skin surface. Becomes difficult.
- FIG. 5 shows the configuration of the pulse measuring device 10 according to the present embodiment that solves this problem.
- the light emitting unit 2 includes a light emitting element 21 and a first polarizing filter 22.
- the light emitting element 21 emits infrared light, for example.
- the light irradiated by the light emitting element 21 irradiates the human body via the first polarizing filter 22.
- the light receiving unit 3 includes a light receiving element 31 and a second polarizing filter 32.
- the reflected light of the light irradiated on the human body is received by the light receiving element 31 through the second polarizing filter 32.
- the light receiving element 31 outputs a signal having a level corresponding to the received light intensity.
- the determination unit 4 determines the pulse based on the fluctuation of the level of the output signal of the light receiving element 31.
- the first polarizing filter 22 and the second polarizing filter 32 are provided so as to be in a so-called crossed Nicol state that does not transmit specularly reflected light on the human skin surface. That is, the first polarizing filter 22 is disposed so as to transmit only the light having the first polarization plane. Therefore, only the light of the first polarization plane out of the light irradiated by the light emitting element 21 is emitted from the light emitting unit 2. On the other hand, the second polarizing filter 32 is provided so as not to transmit specularly reflected light on the skin surface of the light having the first polarization plane.
- the second polarization filter 32 is provided so that the polarization plane of the light transmitted by the second polarization filter 32 is orthogonal to the polarization plane of the regular reflection light of the light of the first polarization plane. Since the deep reflected light is scattered reflected light, the plane of polarization thereof is various. Therefore, all components of the deep reflected light are not cut by the second polarizing filter 32, and at least some of the components. Is transmitted through the second polarizing filter 32 and received by the light receiving element 31. That is, regardless of the state of attachment of the pulse rate measuring device to the human body, the light receiving unit 3 mainly receives only the deep reflected light, thereby accurately measuring the pulse regardless of the state of attachment of the pulse measuring device to the human body. can do.
- the fifth has one light-emitting unit 2 and one light-receiving unit 3 each. However, a plurality of light-receiving units 3 and a plurality of light-receiving units 3 are provided. Even if it is the structure which provides the light emission part 2 and the one light-receiving part 3, the structure which provides the several light emission part 2 and the several light-receiving part 3 may be sufficient. Further, by providing the second polarizing filter 32 so as to transmit only the light having the polarization plane orthogonal to the polarization plane of the regular reflection light of the light having the first polarization plane, the second polarization filter 32 is formed on the skin surface of the light having the first polarization plane. However, the present invention is not limited to such a configuration.
- the polarization plane of the light transmitted by the second polarization filter 32 only needs to be different from the polarization plane of the regular reflection light of the light of the first polarization plane.
- the first polarizing filter 22 can be omitted by using, for example, a laser diode that emits only light having a predetermined polarization plane as the light emitting element 21.
- the pulse measuring device 10 can be provided in a wearable device that is worn on the human body, such as a smart watch.
- the present invention can also be realized as a pulse measuring method.
Abstract
This pulse measurement device is provided with: a light emitting means for emitting light with a first polarization plane; a light receiving means for transmitting and receiving light with a different polarization plane from the polarization plane of specularly reflected light of the light emitted by the light emitting means; and a determination means for determining a pulse on the basis of the intensity of light received by the receiving means.
Description
本発明は、光による脈拍測定技術に関する。
The present invention relates to a pulse measurement technique using light.
特許文献１は、光電式の脈拍測定装置を開示している。光電式の脈拍測定装置は、光を人体に照射し、血液の脈動による吸光度の差を利用することで脈拍を測定している。この様な、光電式の脈拍測定装置は、現在、スマートウォッチ等のウェアラブル装置で広く利用されている。
Patent Document 1 discloses a photoelectric pulse measuring device. The photoelectric pulse measuring device irradiates a human body with light and measures the pulse by utilizing the difference in absorbance due to blood pulsation. Such a photoelectric pulse measuring device is widely used in wearable devices such as smart watches.
光電式の脈拍測定装置を有するウェアラブル装置は、その装着時、光を照射する発光部が人体に密着する様に構成される。しかしながら、ウェアラブル装置を装着している人の動き等により、光を照射する発光部が人体に密着しなくなると、脈拍の読み取りが不安定になり得る。
A wearable device having a photoelectric pulse measuring device is configured such that a light emitting unit that emits light is in close contact with the human body when the device is worn. However, if the light emitting unit that emits light does not come into close contact with the human body due to the movement of the person wearing the wearable device or the like, the pulse reading may become unstable.
本発明の一態様によると、脈拍測定装置は、第１偏波面の光を照射する発光手段と、前記発光手段が照射した前記光の正反射光の偏波面とは異なる偏波面の光を透過させて受光する受光手段と、前記受光手段の受光強度に基づき脈拍を判定する判定手段と、を備えていることを特徴とする。
According to one aspect of the present invention, the pulse measurement device transmits light having a polarization plane different from the polarization plane of the regular reflection light of the light emitted by the light emission means and the light emission means that irradiates the light having the first polarization plane. A light receiving means for receiving light and a determination means for determining a pulse based on the light receiving intensity of the light receiving means.
本発明によると、人体への装着状態に拘らず、精度良く脈拍を測定できる。
According to the present invention, it is possible to accurately measure the pulse regardless of the wearing state on the human body.
本発明のその他の特徴及び利点は、添付図面を参照とした以下の説明により明らかになるであろう。なお、添付図面においては、同じ若しくは同様の構成には、同じ参照番号を付す。
Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar components are denoted by the same reference numerals.
以下、本発明の例示的な実施形態について図面を参照して説明する。なお、以下の実施形態は例示であり、本発明を実施形態の内容に限定するものではない。また、以下の各図においては、実施形態の説明に必要ではない構成要素については図から省略する。
Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In addition, the following embodiment is an illustration and does not limit this invention to the content of embodiment. In the following drawings, components that are not necessary for the description of the embodiments are omitted from the drawings.
図１は、脈拍測定装置を人体１に人体に密着させている状態を示している。発光部２は、光を照射し、受光部３は、発光部２が照射した光の反射光を受光し、受光強度に応じた信号を出力する。図１において図示しない判定部は、受光部３の出力信号に基づき脈拍を判定する。なお、図１においては、受光部３と発光部２をそれぞれ１つとしているが、それぞれ複数であっても良い。図２は、血中ヘモグロビンの吸光度を示すグラフである。動脈内において、ヘモグロビン（Ｈｂ）は、酸素と結合したオキシヘモグロビン（ＨｂＯ２）として存在しており、波長６５０～８５０ｎｍつまり、赤外光の吸光度が大きい。動脈は、心臓鼓動によって、流れる血液量が変化するため、吸光の量も脈拍に応じ変化する。脈拍測定装置の発光部２は、ＨｂＯ２の吸光度が高い、例えば、赤外光を照射し、受光部３は、人体の内部での反射光を検出する。脈動による吸光の変動により、受光部３が受光する人体内部からの反射光の強度は脈動に応じて変化し、よって、判定部は、受光部３の出力信号のレベルの変動に基づき脈拍を判定することができる。
FIG. 1 shows a state in which the pulse measuring device is in close contact with the human body 1. The light emitting unit 2 emits light, and the light receiving unit 3 receives reflected light of the light emitted by the light emitting unit 2 and outputs a signal corresponding to the received light intensity. A determination unit (not shown) in FIG. 1 determines the pulse based on the output signal of the light receiving unit 3. In FIG. 1, one light receiving unit 3 and one light emitting unit 2 are provided, but a plurality of light receiving units 3 and two light emitting units 2 may be provided. FIG. 2 is a graph showing the absorbance of blood hemoglobin. In the artery, hemoglobin (Hb) exists as oxyhemoglobin (HbO2) combined with oxygen, and has a wavelength of 650 to 850 nm, that is, a large absorbance of infrared light. Since the amount of blood flowing through the artery changes due to the heartbeat, the amount of light absorption also changes according to the pulse. The light emitting unit 2 of the pulse measuring device emits, for example, infrared light having a high absorbance of HbO2, and the light receiving unit 3 detects reflected light inside the human body. The intensity of the reflected light from the inside of the human body received by the light receiving unit 3 changes according to the pulsation due to the fluctuation of the light absorption due to the pulsation. can do.
ここで人体の皮膚表面は、赤外領域において全反射に近い性質を持っていることが、出願人による研究で明らかとなった。図３は、赤外線を照射し赤外カメラで取得した人体の手の部分の写真であり、全反射により手が真っ白となっている。ここで、脈拍の測定に重要なのは、人体内部の動脈で散乱反射された、所謂、深部反射光のみである。しかしながら、図４に示す様に、脈拍測定装置が人体に密着していないと、受光部３は、主に、皮膚表面での正反射光を受光することになる。図６は、脈拍測定装置が人体に密着していない場合の深部反射光及び皮膚表面での正反射光を示している。図６に示す様に発光部２が照射した光５１の内、大部分は、皮膚表面で正反射し、正反射光５２となって受光部３により受光される。また、光５１の内の一部が人体の内部に透過する透過光５３となり、さらにその一部が動脈で散乱反射され、深部反射光５４として受光部３により受光される。この場合、受光部３で受光される深部反射光５４のレベルが皮膚表面での正反射光５２のレベルよりもかなり小さくなるため脈拍の検出が困難になる。
Here, the applicant's study revealed that the skin surface of the human body has properties close to total reflection in the infrared region. FIG. 3 is a photograph of the hand part of a human body obtained by irradiating infrared rays and acquired by an infrared camera. The hand is completely white due to total reflection. Here, what is important for measuring the pulse is only the so-called deep reflected light that is scattered and reflected by the artery inside the human body. However, as shown in FIG. 4, if the pulse measuring device is not in close contact with the human body, the light receiving unit 3 mainly receives regular reflection light on the skin surface. FIG. 6 shows deep reflection light and regular reflection light on the skin surface when the pulse measurement device is not in close contact with the human body. As shown in FIG. 6, most of the light 51 irradiated by the light emitting unit 2 is specularly reflected on the skin surface, and is received by the light receiving unit 3 as regular reflected light 52. Further, a part of the light 51 becomes a transmitted light 53 that passes through the inside of the human body, and a part of the light 51 is scattered and reflected by the artery, and is received by the light receiving unit 3 as the deep reflected light 54. In this case, since the level of the deep part reflected light 54 received by the light receiving unit 3 is considerably smaller than the level of the regular reflected light 52 on the skin surface, it is difficult to detect the pulse.
皮膚表面での正反射光を抑えるためには、少なくとも発光部２を人体に密着させる必要がある。しかしながら、体動や、脈拍測定装置又はそれを備えたウェアラブル端末の構造により、発光部２と人体との間に隙間が生じることが有り、この場合、皮膚表面での全反射光により脈拍の測定が困難になる。
In order to suppress specular reflection light on the skin surface, it is necessary to make at least the light emitting part 2 in close contact with the human body. However, there may be a gap between the light emitting part 2 and the human body due to body movement or the structure of the pulse measuring device or the wearable terminal equipped with the body movement. In this case, the pulse is measured by the total reflected light on the skin surface. Becomes difficult.
この問題を解決する本実施形態による脈拍測定装置１０の構成を図５に示す。発光部２は、発光素子２１と、第１偏光フィルタ２２と、を備えている。発光素子２１は、例えば、赤外光を照射する。発光素子２１が照射した光は、第１偏光フィルタ２２を介して、人体を照射する。一方、受光部３は、受光素子３１と、第２偏光フィルタ３２と、を備えている。人体を照射した光の反射光は、第２偏光フィルタ３２を介して、受光素子３１により受光される。受光素子３１は、受光強度に応じたレベルの信号を出力する。判定部４は、受光素子３１の出力信号のレベルの変動に基づき脈拍を判定する。
FIG. 5 shows the configuration of the pulse measuring device 10 according to the present embodiment that solves this problem. The light emitting unit 2 includes a light emitting element 21 and a first polarizing filter 22. The light emitting element 21 emits infrared light, for example. The light irradiated by the light emitting element 21 irradiates the human body via the first polarizing filter 22. On the other hand, the light receiving unit 3 includes a light receiving element 31 and a second polarizing filter 32. The reflected light of the light irradiated on the human body is received by the light receiving element 31 through the second polarizing filter 32. The light receiving element 31 outputs a signal having a level corresponding to the received light intensity. The determination unit 4 determines the pulse based on the fluctuation of the level of the output signal of the light receiving element 31.
第１偏光フィルタ２２と第２偏光フィルタ３２は、人体の皮膚表面での正反射光を透過させない、所謂、クロスニコル状態となる様に設けられる。つまり、第１偏光フィルタ２２は、第１偏波面の光のみを透過させる様に配置される。よって、発光素子２１が照射した光の内の第１偏波面の光のみが発光部２から射出される。一方、第２偏光フィルタ３２は、第１偏波面の光の皮膚表面での正反射光を透過させない様に設けられる。例えば、第２偏光フィルタ３２が透過させる光の偏波面が、第１偏波面の光の正反射光の偏波面とは直交する様に第２偏光フィルタ３２を設ける。深部反射光は、散乱反射光であるため、その偏波面は、様々であり、よって、深部反射光の総ての成分が第２偏光フィルタ３２によりカットされることはなく、少なくとも一部の成分は、第２偏光フィルタ３２を透過して受光素子３１により受光される。つまり、脈拍定装置の人体への取り付け状態に拘らず、受光部３は、主に深部反射光のみを受光し、これにより、脈拍測定装置の人体への取り付け状態に拘らず精度良く脈拍を測定することができる。
The first polarizing filter 22 and the second polarizing filter 32 are provided so as to be in a so-called crossed Nicol state that does not transmit specularly reflected light on the human skin surface. That is, the first polarizing filter 22 is disposed so as to transmit only the light having the first polarization plane. Therefore, only the light of the first polarization plane out of the light irradiated by the light emitting element 21 is emitted from the light emitting unit 2. On the other hand, the second polarizing filter 32 is provided so as not to transmit specularly reflected light on the skin surface of the light having the first polarization plane. For example, the second polarization filter 32 is provided so that the polarization plane of the light transmitted by the second polarization filter 32 is orthogonal to the polarization plane of the regular reflection light of the light of the first polarization plane. Since the deep reflected light is scattered reflected light, the plane of polarization thereof is various. Therefore, all components of the deep reflected light are not cut by the second polarizing filter 32, and at least some of the components. Is transmitted through the second polarizing filter 32 and received by the light receiving element 31. That is, regardless of the state of attachment of the pulse rate measuring device to the human body, the light receiving unit 3 mainly receives only the deep reflected light, thereby accurately measuring the pulse regardless of the state of attachment of the pulse measuring device to the human body. can do.
なお、図５の脈拍測定装置１０は、発光部２及び受光部３をそれぞれ１つずつ有するものであるが、１つの発光部２と複数の受光部３を設ける構成であっても、複数の発光部２と１つの受光部３を設ける構成であっても、複数の発光部２と複数の受光部３を設ける構成であっても良い。また、第２偏光フィルタ３２を、第１偏波面の光の正反射光の偏波面とは直交する偏波面の光のみを透過させる様に設けることで、第１偏波面の光の皮膚表面での正反射光をカットすることができるが、本発明はその様な構成に限定されない。つまり、第２偏光フィルタ３２が透過させる光の偏波面が、第１偏波面の光の正反射光の偏波面とは異なれば良く、この構成により、少なくとも第１偏波面の光の皮膚表面での正反射光を弱めることができ、脈拍の測定精度を改良することができる。また、発光素子２１として、所定の偏波面の光のみを射出する、例えばレーザダイオードを使用することで第１偏光フィルタ２２を省略することもできる。
5 has one light-emitting unit 2 and one light-receiving unit 3 each. However, a plurality of light-receiving units 3 and a plurality of light-receiving units 3 are provided. Even if it is the structure which provides the light emission part 2 and the one light-receiving part 3, the structure which provides the several light emission part 2 and the several light-receiving part 3 may be sufficient. Further, by providing the second polarizing filter 32 so as to transmit only the light having the polarization plane orthogonal to the polarization plane of the regular reflection light of the light having the first polarization plane, the second polarization filter 32 is formed on the skin surface of the light having the first polarization plane. However, the present invention is not limited to such a configuration. In other words, the polarization plane of the light transmitted by the second polarization filter 32 only needs to be different from the polarization plane of the regular reflection light of the light of the first polarization plane. With this configuration, at least on the skin surface of the light of the first polarization plane. The specular reflection light can be weakened, and the pulse measurement accuracy can be improved. Further, the first polarizing filter 22 can be omitted by using, for example, a laser diode that emits only light having a predetermined polarization plane as the light emitting element 21.
また、脈拍測定装置１０は、例えば、スマートウォッチ等、人体に装着するウェアラブル装置に設ける構成とすることができる。また、本発明は、脈拍測定方法として実現することもできる。
Further, the pulse measuring device 10 can be provided in a wearable device that is worn on the human body, such as a smart watch. The present invention can also be realized as a pulse measuring method.
本発明は上記実施の形態に制限されるものではなく、本発明の精神及び範囲から離脱することなく、様々な変更及び変形が可能である。従って、本発明の範囲を公にするために、以下の請求項を添付する。
The present invention is not limited to the above embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.
本願は、２０１７年２月２日提出の日本国特許出願特願２０１７－０１７５９１を基礎として優先権を主張するものであり、その記載内容の全てを、ここに援用する。
This application claims priority on the basis of Japanese Patent Application No. 2017-017591 filed on Feb. 2, 2017, the entire contents of which are incorporated herein by reference.
Claims (7)
- 第１偏波面の光を照射する発光手段と、
前記発光手段が照射した前記光の正反射光の偏波面とは異なる偏波面の光を透過させて受光する受光手段と、
前記受光手段の受光強度に基づき脈拍を判定する判定手段と、
を備えていることを特徴とする脈拍測定装置。 A light emitting means for irradiating light of the first polarization plane;
A light receiving means for transmitting and receiving light having a polarization plane different from the polarization plane of the regular reflection light of the light emitted by the light emitting means;
Determining means for determining a pulse based on the light receiving intensity of the light receiving means;
A pulse measuring device comprising: - 前記発光手段は、光を照射する発光素子と、前記第１偏波面の光を透過させる偏光フィルタと、を備えていることを特徴とする請求項１に記載の脈拍測定装置。 2. The pulse measuring device according to claim 1, wherein the light emitting means includes a light emitting element that emits light and a polarizing filter that transmits light of the first polarization plane.
- 前記受光手段は、光を受光する受光素子と、前記発光手段が照射した前記光の正反射光の偏波面とは異なる偏波面の光を透過させる偏光フィルタと、を備えていることを特徴とする請求項１又は２に記載の脈拍測定装置。 The light receiving means includes a light receiving element that receives light, and a polarization filter that transmits light having a polarization plane different from the polarization plane of the regular reflection light of the light irradiated by the light emitting means. The pulse measuring device according to claim 1 or 2.
- 前記受光手段は、光を受光する受光素子と、前記発光手段が照射した前記光の正反射光の偏波面とは直交する偏波面の光を透過させる偏光フィルタと、を備えていることを特徴とする請求項１又は２に記載の脈拍測定装置。 The light receiving means includes a light receiving element that receives light, and a polarization filter that transmits light having a polarization plane orthogonal to the polarization plane of the regular reflection light of the light irradiated by the light emitting means. The pulse measuring device according to claim 1 or 2.
- 前記発光手段が照射する前記光は赤外光であることを特徴とする請求項１から４のいずれか１項に記載の脈拍測定装置。 The pulse measuring device according to any one of claims 1 to 4, wherein the light emitted by the light emitting means is infrared light.
- 請求項１から５のいずれか１項に記載の脈拍測定装置を備えていることを特徴とするウェアラブル装置。 A wearable device comprising the pulse measurement device according to any one of claims 1 to 5.
- 第１偏波面の光を照射することと、
前記第１偏波面の前記光の正反射光の偏波面とは異なる偏波面の光を透過させて受光し、受光強度に応じた信号を出力することと、
前記受光強度に応じた信号に基づき脈拍を判定することと、
を含むことを特徴とする脈拍測定方法。 Irradiating light of a first polarization plane;
Transmitting and receiving light having a polarization plane different from the polarization plane of the regular reflection light of the first polarization plane, and outputting a signal corresponding to the received light intensity;
Determining a pulse based on a signal corresponding to the received light intensity;
A method for measuring a pulse, comprising:
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|---|---|---|---|
| JP2017017591A JP2018121955A (en) | 2017-02-02 | 2017-02-02 | Pulse measuring device, wearable device, and pulse measuring method |
| JP2017-017591 | 2017-02-02 |
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| WO2018142865A1 true WO2018142865A1 (en) | 2018-08-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211176A (en) * | 1997-01-31 | 1998-08-11 | Seiko Epson Corp | Reflected light detector and pulse wave detector |
| JPH10248819A (en) * | 1997-03-13 | 1998-09-22 | Seiko Epson Corp | Pulse-wave diagnostic device |
| JP2013215260A (en) * | 2012-04-05 | 2013-10-24 | Omron Healthcare Co Ltd | Sphygmomanometer |
| JP2014507208A (en) * | 2011-01-19 | 2014-03-27 | ドルフィン テクノロジーズ オサケ ユキチュア | Method and apparatus for visualization of cardiovascular pulse waves |
-
2017
- 2017-02-02 JP JP2017017591A patent/JP2018121955A/en active Pending
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2018
- 2018-01-11 WO PCT/JP2018/000390 patent/WO2018142865A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211176A (en) * | 1997-01-31 | 1998-08-11 | Seiko Epson Corp | Reflected light detector and pulse wave detector |
| JPH10248819A (en) * | 1997-03-13 | 1998-09-22 | Seiko Epson Corp | Pulse-wave diagnostic device |
| JP2014507208A (en) * | 2011-01-19 | 2014-03-27 | ドルフィン テクノロジーズ オサケ ユキチュア | Method and apparatus for visualization of cardiovascular pulse waves |
| JP2013215260A (en) * | 2012-04-05 | 2013-10-24 | Omron Healthcare Co Ltd | Sphygmomanometer |
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