JP6597490B2 - 電波式生体センサ - Google Patents
電波式生体センサ Download PDFInfo
- Publication number
- JP6597490B2 JP6597490B2 JP2016122689A JP2016122689A JP6597490B2 JP 6597490 B2 JP6597490 B2 JP 6597490B2 JP 2016122689 A JP2016122689 A JP 2016122689A JP 2016122689 A JP2016122689 A JP 2016122689A JP 6597490 B2 JP6597490 B2 JP 6597490B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- angular velocity
- pass filter
- differential value
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/1118—Determining activity level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
-
- 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
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves using microwaves or terahertz waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6893—Cars
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2503/00—Evaluating a particular growth phase or type of persons or animals
- A61B2503/20—Workers
- A61B2503/22—Motor vehicles operators, e.g. drivers, pilots, captains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Physiology (AREA)
- Chemical & Material Sciences (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Artificial Intelligence (AREA)
- Psychiatry (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Immunology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Cardiology (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Pulmonology (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Description
Bi(t)=1/2cos(4πd(t)/λ+4πx(t)/λ)
Bq(t)=1/2cos(π/4+4πd(t)/λ+4πx(t)/λ)
これらは、ADコンバータによってアナログ信号からデジタル信号に変換され、センサ部が出力した検出信号として、生体信号抽出部に入力される。
そこで、本発明は、ドップラ―センサを用いた電波式生体センサにおいて、心拍数などの微細な動きを伴う生体情報を正確に検知する電波式生体センサを提供する。
これによれば、心拍数などの微細な動きを伴う生体情報を正確に検知する電波式生体センサを提供することができる。
これによれば、様々な生体情報を検出することができる。
図1乃至図4を参照し、本実施例における電波式生体センサ100を説明する。電波式生体センサ100は、人間の身体の一部が直接的または間接的に接する面を有する機器に設置され、その機器の使用者の生体情報を検知する。ここで、人間の身体の一部が接する面を有する機器(器具・器械・機械の総称)とは、具体的には、たとえば、人が座る椅子やソファ、人が横たわるベッド、病院内に設置される身体検査機器、車両や航空機内に設置され人が座る座席などを言う。
fr=f0±fd ・・・(1)
なお、送信波周波数:f0
ドップラ周波数fd=(2f0|v|/c0)・cosα
光速:c0
測定対象の相対移動速度:v
送信波に対する測定対象の移動方向の交差角:α
xs(t)=Ascos(ωst) ・・・(2)
なお、送信波振幅:As
送信波角速度:ωs=2πf0
xr(t)=Arcos([ωs±ωd]t+φ) ・・・(3)
なお、受信波振幅:Ar
ドップラ角速度:ωd=2πfd
測定対象との距離に依存する位相:φ
xs(t)xr(t)=AsArcos(ωst)cos([ωs+ωd]t+φ)
=(AsAr/2){cos(ωdt+φ)+cos([2ωs+ωd]t+φ)}
・・・(4)
I(t)=(AsAr/2)cos(ωdt+φ) ・・・(5)
Q(t)=(AsAr/2)cos(ωdt+φ−π/2) ・・・(6)
式(5)で示されるI信号および式(6)で示されるQ信号が、信号取得部30に入力される。
ΔI≒dI/dt
であり、Q信号微分値ΔQは、
ΔQ≒dQ/dt
であるから、式(5)と式(6)をそれぞれ時間tで微分すると、I信号微分値ΔIとQ信号微分値ΔQが算出できる。
ω=dθ/dt
なお、θ=arctan(I−Ioffset)/(Q−Qoffset)
Ioffset:電波式生体センサの設置条件により定まる定数
Qoffsetは:電波式生体センサの設置条件により定まる定数
と表すことができるので、角速度ωは、(数1)で表すことができる。
Δd=λ・Δθ/4π ・・・(7)
なお、λ:送信波の波長(たとえば、周波数が24GHzの場合12.5mm)
そこで、本発明に係る本実例では、人の大きな動作による生体表面の動きは、微小時間においてはほぼゼロであるため、I信号微分値ΔIとQ信号微分値ΔQに着目することで、心拍や呼吸による生体表面の動きを抽出することができる。また、距離や反射面の傾きなどの生体表面の状態の変化に乱されないように、上記(数1)に基づいて位相の変化であるI信号・Q信号座標平面における角速度ωを算出することで、心拍数や呼吸数などの体表面に微細な動きを伴う生体情報を正確に検出することができる。
10 電磁波照射部
11 送信アンテナ
12 分配器
13 発振器
20 反射波受信部
21 受信アンテナ
22 ミキサ
30 信号取得部
40 角速度算出部
50 生体情報抽出部
60 制御部
70 外部出力部
80 ローパスフィルタ
90 バンドパスフィルタ(微分算出部)
DS ドップラーセンサ
WL ハンドル
ST 座席
MC マイクロコンピュータ
TG 測定対象
IP I信号出力ポート
QP Q信号出力ポート
Claims (2)
- 生体の体表面に電磁波を照射する電磁波照射部と、
前記電磁波照射部が照射した電磁波が前記体表面で反射した反射波を受信し、前記照射した電磁波信号と受信した反射信号を乗算したI信号と前記I信号を所定の位相だけ遅らせたQ信号を取得する反射波受信部と、
前記反射波受信部が取得したI信号とQ信号の高周波成分を除去するローパスフィルタと、
前記反射波受信部が取得したI信号とQ信号からDC成分を除去すると共に両信号を微分し、I信号微分値とQ信号微分値を算出するバンドパスフィルタと、
前記ローパスフィルタが高周波成分を除去したI信号とQ信号、および、I信号とQ信号に基づいて前記バンドパスフィルタが算出したI信号微分値とQ信号微分値に基づいて、I信号とQ信号の角速度を算出する角速度算出部と、
を備える電波式生体センサ。 - 前記角速度算出部が算出した角速度に基づいて、生体の生体情報を抽出する生体情報抽出部をさらに備えることを特徴とする請求項1に記載の電波式生体センサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016122689A JP6597490B2 (ja) | 2016-06-21 | 2016-06-21 | 電波式生体センサ |
US15/628,530 US10429227B2 (en) | 2016-06-21 | 2017-06-20 | Electric wave type biosensor |
CN201710473105.2A CN107518903A (zh) | 2016-06-21 | 2017-06-21 | 电波型生物传感器 |
DE102017210342.6A DE102017210342A1 (de) | 2016-06-21 | 2017-06-21 | Elektrowellen-Biosensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016122689A JP6597490B2 (ja) | 2016-06-21 | 2016-06-21 | 電波式生体センサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2017225559A JP2017225559A (ja) | 2017-12-28 |
JP6597490B2 true JP6597490B2 (ja) | 2019-10-30 |
Family
ID=60481529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016122689A Active JP6597490B2 (ja) | 2016-06-21 | 2016-06-21 | 電波式生体センサ |
Country Status (4)
Country | Link |
---|---|
US (1) | US10429227B2 (ja) |
JP (1) | JP6597490B2 (ja) |
CN (1) | CN107518903A (ja) |
DE (1) | DE102017210342A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7010002B2 (ja) * | 2018-01-09 | 2022-01-26 | セイコーエプソン株式会社 | 脈波解析装置、脈波解析方法およびプログラム |
US11226408B2 (en) * | 2018-07-03 | 2022-01-18 | Panasonic Intellectual Property Management Co., Ltd. | Sensor, estimating device, estimating method, and recording medium |
JP7202599B2 (ja) * | 2018-08-27 | 2023-01-12 | 国立大学法人岩手大学 | 血圧測定装置、車両装置、及び血圧測定プログラム |
JP2020146235A (ja) * | 2019-03-13 | 2020-09-17 | 日本電産モビリティ株式会社 | 生体情報出力装置、生体情報出力方法、生体情報出力プログラムおよび記録媒体 |
DE102019203688A1 (de) * | 2019-03-19 | 2020-09-24 | Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg | Verfahren zur Detektion eines Lebewesens auf einem Sitz eines Fahrzeugs, Detektionsanordnung und Fahrzeug |
DE102019204157A1 (de) * | 2019-03-26 | 2020-10-01 | Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg | Verfahren zur Innenraumüberwachung eines Fahrzeugs, Überwachungsanordnung und Fahrzeug |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4475029B2 (ja) | 2004-06-16 | 2010-06-09 | 日本電気株式会社 | Ip電話システム、ip電話呼制御サーバ及びそれらに用いる緊急呼発信方法並びにそのプログラム |
JP4405343B2 (ja) | 2004-08-23 | 2010-01-27 | 株式会社デンソー | 心拍計測装置 |
CN101324666A (zh) * | 2007-06-16 | 2008-12-17 | 电子科技大学 | 隐蔽目标生命迹象探测方法及隐蔽目标探测装置 |
JP2010120493A (ja) | 2008-11-19 | 2010-06-03 | Panasonic Corp | 生体信号検知装置 |
JP5409148B2 (ja) | 2009-07-10 | 2014-02-05 | 三菱電機株式会社 | 生体状態取得装置、生体状態取得プログラム、生体状態取得装置を備えた機器及び空気調和機 |
JP5467395B2 (ja) * | 2009-09-02 | 2014-04-09 | 株式会社産学連携機構九州 | 生体情報測定システム |
JP6029108B2 (ja) * | 2011-02-25 | 2016-11-24 | 株式会社産学連携機構九州 | 生体情報検出システム |
JP5606400B2 (ja) * | 2011-06-16 | 2014-10-15 | 株式会社東芝 | 信号生成回路、レーダー装置 |
JP5578683B2 (ja) * | 2011-10-03 | 2014-08-27 | 公立大学法人首都大学東京 | 身体情報測定装置及び身体情報測定方法 |
JP2014126523A (ja) * | 2012-12-27 | 2014-07-07 | Oki Electric Ind Co Ltd | 速度算出装置、速度算出方法及びプログラム |
CN103340619A (zh) * | 2013-06-18 | 2013-10-09 | 浙江大学 | 一种电磁波生理运动成像*** |
JP6176336B2 (ja) * | 2013-12-13 | 2017-08-09 | パナソニックIpマネジメント株式会社 | 便座装置、および便器装置 |
US10457161B2 (en) * | 2014-03-21 | 2019-10-29 | Iee International Electronics & Engineering S.A. | Method and system for unattended child detection |
CN104434059A (zh) * | 2014-10-29 | 2015-03-25 | 上海无线电设备研究所 | 一种利用太赫兹波进行非接触式探测生命体征的探测方法 |
CN107645922B (zh) * | 2015-04-20 | 2021-11-09 | 瑞思迈传感器技术有限公司 | 用传感器进行手势识别 |
-
2016
- 2016-06-21 JP JP2016122689A patent/JP6597490B2/ja active Active
-
2017
- 2017-06-20 US US15/628,530 patent/US10429227B2/en active Active
- 2017-06-21 DE DE102017210342.6A patent/DE102017210342A1/de active Pending
- 2017-06-21 CN CN201710473105.2A patent/CN107518903A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2017225559A (ja) | 2017-12-28 |
US10429227B2 (en) | 2019-10-01 |
CN107518903A (zh) | 2017-12-29 |
US20170363458A1 (en) | 2017-12-21 |
DE102017210342A1 (de) | 2017-12-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6597490B2 (ja) | 電波式生体センサ | |
EP2093588B1 (en) | Pulsed ultra-wideband sensor and the method thereof | |
Li et al. | A review on recent advances in Doppler radar sensors for noncontact healthcare monitoring | |
CN102014745B (zh) | 患者的非接触呼吸监测 | |
US7753849B2 (en) | Doppler radar cardiopulmonary sensor and signal processing system and method for use therewith | |
US20190008459A1 (en) | Method and a system for detecting a vital sign of a subject | |
Ambrosanio et al. | A multi-channel ultrasound system for non-contact heart rate monitoring | |
CN113608206B (zh) | 用于检测受试者的运动的方法和设备 | |
US11399723B2 (en) | Non-contact method of physiological characteristic detection | |
JP6597491B2 (ja) | 電波式生体センサ | |
Yen et al. | Proof-of-principle experiment on 24 ghz medical radar for non-contact vital signs measurement | |
Lee et al. | Doppler radar in respiratory monitoring: Detection and analysis | |
Rong et al. | Novel Respiration-Free Heartbeat Detection Algorithm Using Millimeter-Wave Radar | |
JP2022185752A (ja) | 生体情報検出システム、プログラム、及び、生体情報検出方法 | |
WO2020196916A1 (ja) | 生体信号処理装置、及び生体信号処理プログラム | |
JP6558343B2 (ja) | 生体センサ | |
JP2019213772A (ja) | 心拍計測方法および心拍計測装置 | |
Srihari et al. | Measurement and evaluation of human vital sign using 77ghz awr1642 fmcw radar sensor | |
JP2018064642A (ja) | 生体センサ | |
WO2009104989A1 (ru) | Импульсный сверхширокополосный датчик дистанционного мониторинга дыхания и сердцебиения | |
US20200260974A1 (en) | Heartbeat measurement device | |
Franceschini et al. | MUHD: A Multi-channel Ultrasound Prototype for Remote Heartbeat Detection. | |
KR102181745B1 (ko) | 차동위상 레이더 생체신호 검출 장치 및 방법 | |
Benny et al. | Design and Measurements of mmWave FMCW Radar Based Non-Contact Multi-Patient Heart Rate and Breath Rate Monitoring System | |
KR102254326B1 (ko) | Uwb 레이더를 이용하는 부정맥 진단 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180829 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20190311 |
|
RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20190319 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20190515 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20190604 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190624 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190903 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190916 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6597490 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |