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WO2005033719A1 - Capteur de potentiel passif interrogeable par telemetrie - Google Patents

Capteur de potentiel passif interrogeable par telemetrie Download PDF

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Publication number
WO2005033719A1
WO2005033719A1 PCT/EP2004/010714 EP2004010714W WO2005033719A1 WO 2005033719 A1 WO2005033719 A1 WO 2005033719A1 EP 2004010714 W EP2004010714 W EP 2004010714W WO 2005033719 A1 WO2005033719 A1 WO 2005033719A1
Authority
WO
WIPO (PCT)
Prior art keywords
potential
telemetric
queryable
reflector
potential sensor
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.)
Ceased
Application number
PCT/EP2004/010714
Other languages
German (de)
English (en)
Inventor
Jörg Müller
Anna Karilainen
Thomas Finnberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technische Universitaet Hamburg Harburg
Tutech Innovation GmbH
Original Assignee
Technische Universitaet Hamburg Harburg
Tutech Innovation GmbH
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
Application filed by Technische Universitaet Hamburg Harburg, Tutech Innovation GmbH filed Critical Technische Universitaet Hamburg Harburg
Publication of WO2005033719A1 publication Critical patent/WO2005033719A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006—ECG or EEG signals
    • 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
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/26—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using modulation of waves other than light, e.g. radio or acoustic waves

Definitions

  • the invention relates to a telemetric queryable potential sensor and a method for telemetric measurement of electrical potentials or changes in potential.
  • the object of the present invention is to implement such a system on the basis of a known transmission principle, the surface acoustic wave reflectors (SAW reflector) with an integrated, detunable LC circuit for the specific application of the determination of small potentials, such as they have already been proposed and implemented for temperature and pressure measuring systems that can be queried telemetrically.
  • SAW reflector surface acoustic wave reflectors
  • These systems are based on the fact that the surface acoustic wave is excited by a transmitter via a receiving antenna and propagates on the SAW.
  • At least two reflectors one of which is not connected and reflects a signal that functions as a normal with respect to the transmission link and the second is connected to an electrical circuit, usually a series or parallel resonant circuit, in which one of the components, usually the Capacity, undergoes a change corresponding to the measured variable. This changes the reflection and amplitude of this reflector. Both reflections are emitted again via the antenna of the SAW and recorded by a receiver and evaluated by comparison.
  • the distances between the reflectors can be at different distances from the excitation structure, so that the echoes arrive at different times and thus enable the different sensors to be recognized.
  • the present invention extends this measuring principle to the determination of even low electrical potentials and potential changes to a purely passive system which does not require its own energy supply, since the measured variable itself, the electrical potential to be determined, detunes the resonant circuit directly.
  • This enables very small, wear and maintenance-free, self-sufficient passive sensors to be implemented, which can also be used in measuring points that are difficult to access or later completely inaccessible, as occur in closed systems, but especially in implantation medicine. can be used, and can be applied with low adhesive forces due to their small size and light weight, which in turn is of great advantage, for example, in medical probes.
  • a capacitance diode or a varactor 7, with its capacitance dependent on the applied voltage 8 is used for the variable that detunes the resonant circuit and thus modulates the reflected signal in amplitude and phase.
  • Such a varactor can preferably be a metal insulator / oxide semiconductor diode (MIS or MOS diode), but also a metal semiconductor (Schottky) diode or a PN diode, whose space charge capacities have a pronounced voltage dependency exhibit if they are realized in sufficiently low-doped semiconductor materials (10 14 - 10 16 cm -3 ).
  • the setting of a change in the capacitance that is as pronounced as possible as a function of the potential present for the highest possible sensitivity can be achieved by the doping level at the PN junction (PN diode), additionally by the choice of metal for the Schottky diode, and also by the choice of the isolator the MIS diode can be reached.
  • the semiconductor diodes are, as is customary in semiconductor electronics, each with a maximum of low-doped epitaxial layers required for the necessary capacitance increase (typically 0.1 to 2 ⁇ m) on low-resistance, ie highly doped, substrates.
  • the ohmic resistance of the inductance 6 is also minimized by using e.g. by galvanically growing the winding - preferably copper, gold or silver - in a photoresist structure with a high aspect ratio.
  • This measure also serves to miniaturize the intended applications and allows e.g. typical structure sizes of the coil turns of some 10 ⁇ m width and spacing at> 50 ⁇ m height.
  • the system should preferably be operated with the frequency bands between 400 MHz and 2.5 GHz approved for this purpose, because of the possible miniaturization of antenna structures and the sizes of inductance and capacitance as well as the larger available bandwidth, preferably at the high frequency around 2.4 GHz ,
  • the present invention also relates to a method for measuring electrical potentials or potential changes, in which an acoustic surface wave is excited, which propagates on a surface wave element and is reflected on an interdigital structure in the form of a reflector, and in which the acoustic surface wave is transmitted by a reflector connected detunable electrical circuit is changed in amplitude and phase, for example.
  • the electrical circuit is detuned directly by the electrical potential to be measured or the electrical potential change.
  • the capacitance of a varactor provided in the detunable electrical circuit is preferably changed by the electrical potential to be measured.
  • the varactor can be a MIS diode, MOS diode, Schottky diode or a PN diode.
  • the varactor is more preferably operated in the range of the maximum slope of its voltage characteristic curve in order to enable maximum sensitivity of the measurement.
  • the surface acoustic wave is generated by the reflector connected to the detunable electrical circuit and by an unloaded, i.e. undisturbed reflector, i.e. not connected to a circuit, for example, the reflections, i.e. the reflected surface acoustic waves are compared with each other for evaluation.
  • a potential sensor that can be queried telemetrically is preferably used.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

L'invention se rapporte à la mesure de potentiels électriques au moyen d'un capteur passif interrogeable par télémétrie. A cet effet, un circuit de résonance LC est raccordé à l'un de deux réflecteurs d'un élément à ondes acoustiques de surface (réflecteur SAW) comprenant une structure d'excitation qui reçoit un signal haute fréquence par l'intermédiaire d'une antenne et retransmet la réflexion. Une diode varactor dont la capacité varie en fonction du potentiel électrique à mesurer sert de condensateur. Cette diode varactor désaccorde ainsi le circuit et modifie par là même la valeur et la phase du signal réfléchi par rapport à celui du réflecteur non perturbé.
PCT/EP2004/010714 2003-09-27 2004-09-24 Capteur de potentiel passif interrogeable par telemetrie Ceased WO2005033719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10361991.7 2003-09-27
DE10361991A DE10361991A1 (de) 2003-09-27 2003-09-27 Telemetrisch abfragbarer passiver Potentialsensor

Publications (1)

Publication Number Publication Date
WO2005033719A1 true WO2005033719A1 (fr) 2005-04-14

Family

ID=34399724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/010714 Ceased WO2005033719A1 (fr) 2003-09-27 2004-09-24 Capteur de potentiel passif interrogeable par telemetrie

Country Status (2)

Country Link
DE (1) DE10361991A1 (fr)
WO (1) WO2005033719A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251712A3 (fr) * 2008-02-14 2011-06-08 Isis Innovation Ltd Interrogation par rétrodiffusion sans fil d'une étiquette LC de capteur et d'une étiquette LC de référence
RU2427943C1 (ru) * 2010-02-15 2011-08-27 Открытое акционерное общество "Авангард" Пассивный датчик на поверхностных акустических волнах
EP2152149A4 (fr) * 2007-05-04 2013-05-15 Univ Arizona Systèmes et procédés pour une transmission sans fil de biopotentiels
RU2550697C1 (ru) * 2013-10-24 2015-05-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Южный федеральный университет Датчик на поверхностных акустических волнах для измерения концентрации моноокиси углерода
WO2020022925A1 (fr) * 2018-07-27 2020-01-30 Научно-Технический Центр "Радиотехнических Устройств И Систем" С Ограниченной Ответственностью Capteur passif sans fil de champ magnétique sur des ondes acoustiques de surface
US11529194B2 (en) 2016-03-31 2022-12-20 Koninklijke Philips N.V. Wireless position determination

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005061683B4 (de) * 2005-12-21 2011-12-08 Forschungsverbund Berlin E.V. Vorrichtung, Tastkopf und Verfahren zur galvanisch entkoppelten Übertragung eines Messsignals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025631A (en) * 1978-05-12 1980-01-23 Kernforschungsz Karlsruhe Measuring high frequency signals
WO2000039596A1 (fr) * 1998-12-23 2000-07-06 Voltage Vision Ltd. Procede et dispositif de detection sans contact de champs magnetiques ou electriques externes
DE10010846A1 (de) * 2000-03-06 2001-09-20 Siemens Ag Erzeugnis mit einem Sensor und einem Oberflächenwellenelement sowie Verfahren und Anordnung zum Bestimmen einer einem reaktiven Widerstand entsprechenden Meßgröße von einem Sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025631A (en) * 1978-05-12 1980-01-23 Kernforschungsz Karlsruhe Measuring high frequency signals
WO2000039596A1 (fr) * 1998-12-23 2000-07-06 Voltage Vision Ltd. Procede et dispositif de detection sans contact de champs magnetiques ou electriques externes
DE10010846A1 (de) * 2000-03-06 2001-09-20 Siemens Ag Erzeugnis mit einem Sensor und einem Oberflächenwellenelement sowie Verfahren und Anordnung zum Bestimmen einer einem reaktiven Widerstand entsprechenden Meßgröße von einem Sensor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2152149A4 (fr) * 2007-05-04 2013-05-15 Univ Arizona Systèmes et procédés pour une transmission sans fil de biopotentiels
US9693708B2 (en) 2007-05-04 2017-07-04 Arizona Board Of Regents For And On Behalf Of Arizona State University Systems and methods for wireless transmission of biopotentials
EP2251712A3 (fr) * 2008-02-14 2011-06-08 Isis Innovation Ltd Interrogation par rétrodiffusion sans fil d'une étiquette LC de capteur et d'une étiquette LC de référence
RU2427943C1 (ru) * 2010-02-15 2011-08-27 Открытое акционерное общество "Авангард" Пассивный датчик на поверхностных акустических волнах
RU2550697C1 (ru) * 2013-10-24 2015-05-10 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Южный федеральный университет Датчик на поверхностных акустических волнах для измерения концентрации моноокиси углерода
US11529194B2 (en) 2016-03-31 2022-12-20 Koninklijke Philips N.V. Wireless position determination
WO2020022925A1 (fr) * 2018-07-27 2020-01-30 Научно-Технический Центр "Радиотехнических Устройств И Систем" С Ограниченной Ответственностью Capteur passif sans fil de champ magnétique sur des ondes acoustiques de surface

Also Published As

Publication number Publication date
DE10361991A1 (de) 2005-04-28

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