WO2001016607A3 - Capacitive electric field sensor - Google Patents

Capacitive electric field sensor Download PDF

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Publication number
WO2001016607A3
WO2001016607A3 PCT/CA2000/000981 CA0000981W WO0116607A3 WO 2001016607 A3 WO2001016607 A3 WO 2001016607A3 CA 0000981 W CA0000981 W CA 0000981W WO 0116607 A3 WO0116607 A3 WO 0116607A3
Authority
WO
WIPO (PCT)
Prior art keywords
electric field
electrode
pick
capacitive
field sensor
Prior art date
Application number
PCT/CA2000/000981
Other languages
French (fr)
Other versions
WO2001016607A2 (en
Inventor
Del Re Riccardo Brun
Izmail Batkin
Wayne Young
Original Assignee
Cordless Antistatic Res Inc
Del Re Riccardo Brun
Izmail Batkin
Wayne Young
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CA002280996A external-priority patent/CA2280996A1/en
Application filed by Cordless Antistatic Res Inc, Del Re Riccardo Brun, Izmail Batkin, Wayne Young filed Critical Cordless Antistatic Res Inc
Priority to AU66785/00A priority Critical patent/AU6678500A/en
Priority to CA002382517A priority patent/CA2382517A1/en
Priority to US10/049,675 priority patent/US6807438B1/en
Publication of WO2001016607A2 publication Critical patent/WO2001016607A2/en
Publication of WO2001016607A3 publication Critical patent/WO2001016607A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A61B5/302—Input circuits therefor for capacitive or ionised electrodes, e.g. metal-oxide-semiconductor field-effect transistors [MOSFET]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

An electric field sensor employs a capacitive pick-up electrode in a voltage divider network connected to a body emanating an electric field. The system is relatively insensitive to variations in the separation gap between electrode and body, reducing sensor motion artifacts in the output signal and stabilizing its low frequency response. The pick-up electrode may be positioned at a 'stand off' location, spaced from intimate contact with the surface of the body. This is equivalent to providing low level capacitive values for the capacitive coupling between the pick-up electrode and the body whose electric field is to be monitored. Or a series limiting capacitor may be provided in the input stage. Human body-generated electrical signals may be acquired without use of conductive gels and suction-based electrodes, without direct electrical contact to the body, and even through thin layers of clothing.
PCT/CA2000/000981 1999-08-26 2000-08-25 Capacitive electric field sensor WO2001016607A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU66785/00A AU6678500A (en) 1999-08-26 2000-08-25 Electric field sensor
CA002382517A CA2382517A1 (en) 1999-08-26 2000-08-25 Electro field sensor
US10/049,675 US6807438B1 (en) 1999-08-26 2000-08-25 Electric field sensor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA2,280,996 1999-08-26
CA002280996A CA2280996A1 (en) 1999-08-26 1999-08-26 Electric field sensor
US50573200A 2000-02-17 2000-02-17
US09/505,732 2000-02-17

Publications (2)

Publication Number Publication Date
WO2001016607A2 WO2001016607A2 (en) 2001-03-08
WO2001016607A3 true WO2001016607A3 (en) 2001-08-30

Family

ID=25681152

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2000/000981 WO2001016607A2 (en) 1999-08-26 2000-08-25 Capacitive electric field sensor

Country Status (2)

Country Link
AU (1) AU6678500A (en)
WO (1) WO2001016607A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9597004B2 (en) 2014-10-31 2017-03-21 Irhythm Technologies, Inc. Wearable monitor
US11589792B1 (en) 2020-08-06 2023-02-28 Irhythm Technologies, Inc. Wearable device with bridge portion

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7088175B2 (en) 2001-02-13 2006-08-08 Quantum Applied Science & Research, Inc. Low noise, electric field sensor
WO2002065904A1 (en) * 2001-02-23 2002-08-29 Cordless Antistatic Research Inc. Enhanced pickup bio-electrode
US7371041B2 (en) 2001-08-30 2008-05-13 Seagate Technology Llc Assembly station with rotatable turret which forms and unloads a completed stack of articles
US6728576B2 (en) 2001-10-31 2004-04-27 Medtronic, Inc. Non-contact EKG
GB0129390D0 (en) * 2001-12-07 2002-01-30 Clark Terrence D Electrodynamic sensors and applications thereof
US8923956B2 (en) 2001-12-07 2014-12-30 The University Of Sussex Electrodynamic sensors and applications thereof
AU2002357807A1 (en) * 2001-12-10 2003-06-23 Bae Systems Information And Electronic Systems Integration Inc. Electric field sensor
US7116993B2 (en) 2002-09-27 2006-10-03 Rockwell Automation Technologies, Inc. System and method for providing location based information
US7043316B2 (en) 2003-02-14 2006-05-09 Rockwell Automation Technologies Inc. Location based programming and data management in an automated environment
US6961601B2 (en) 2003-06-11 2005-11-01 Quantum Applied Science & Research, Inc. Sensor system for measuring biopotentials
US8645569B2 (en) 2004-03-12 2014-02-04 Rockwell Automation Technologies, Inc. Juxtaposition based machine addressing
US7466148B2 (en) 2004-07-01 2008-12-16 Quantum Applied Science & Research, Inc. Sensor system for measuring an electric potential signal of an object
EP1772702A4 (en) * 2004-07-23 2011-10-05 Nippon Telegraph & Telephone Surface shape recognizing sensor device
GB0602229D0 (en) * 2006-02-03 2006-03-15 Univ Sussex Electrical potential sensor for use in the detection of nuclear magnetic resonance signals
US8244335B2 (en) 2006-02-06 2012-08-14 The Board Of Trustees Of The Leland Stanford Junior University Non-invasive cardiac monitor and methods of using continuously recorded cardiac data
US8560046B2 (en) 2010-05-12 2013-10-15 Irhythm Technologies, Inc. Device features and design elements for long-term adhesion
US9332919B2 (en) 2011-04-04 2016-05-10 Cardiocity Limited Heart monitoring apparatus
GB2489704B (en) 2011-04-04 2013-06-12 Cardiocity Ltd ECG mat
EP3753483A1 (en) 2013-01-24 2020-12-23 Irhythm Technologies, Inc. Physiological monitoring device
WO2014168841A1 (en) 2013-04-08 2014-10-16 Irhythm Technologies, Inc Skin abrader
KR102563372B1 (en) 2020-02-12 2023-08-03 아이리듬 테크놀로지스, 아이엔씨 Method for Inferring Patient Physiological Characteristics Using Non-Invasive Cardiac Monitors and Recorded Cardiac Data
JP2023536982A (en) 2020-08-06 2023-08-30 アイリズム・テクノロジーズ・インコーポレイテッド Electrical components of physiological monitoring devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880146A (en) * 1973-06-04 1975-04-29 Donald B Everett Noise compensation techniques for bioelectric potential sensing
US3882846A (en) * 1973-04-04 1975-05-13 Nasa Insulated electrocardiographic electrodes
GB1442296A (en) * 1972-08-16 1976-07-14 Secr Defence Electrodes
US4602639A (en) * 1982-07-01 1986-07-29 Mardice Holding S.A.R.L. Method and apparatus for contactless measurement of charge concentrations and potential differences in biological organisms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1442296A (en) * 1972-08-16 1976-07-14 Secr Defence Electrodes
US3882846A (en) * 1973-04-04 1975-05-13 Nasa Insulated electrocardiographic electrodes
US3880146A (en) * 1973-06-04 1975-04-29 Donald B Everett Noise compensation techniques for bioelectric potential sensing
US4602639A (en) * 1982-07-01 1986-07-29 Mardice Holding S.A.R.L. Method and apparatus for contactless measurement of charge concentrations and potential differences in biological organisms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9597004B2 (en) 2014-10-31 2017-03-21 Irhythm Technologies, Inc. Wearable monitor
US11589792B1 (en) 2020-08-06 2023-02-28 Irhythm Technologies, Inc. Wearable device with bridge portion

Also Published As

Publication number Publication date
AU6678500A (en) 2001-03-26
WO2001016607A2 (en) 2001-03-08

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