WO2005033719A1 - Telemetrisch abfragbarer passiver potentialsensor - Google Patents
Telemetrisch abfragbarer passiver potentialsensor Download PDFInfo
- 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
Links
- 238000010897 surface acoustic wave method Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000002592 echocardiography Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims 3
- 238000005246 galvanizing Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 230000002123 temporal effect Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000013155 cardiography Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10361991A DE10361991A1 (de) | 2003-09-27 | 2003-09-27 | Telemetrisch abfragbarer passiver Potentialsensor |
DE10361991.7 | 2003-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005033719A1 true WO2005033719A1 (de) | 2005-04-14 |
Family
ID=34399724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/010714 WO2005033719A1 (de) | 2003-09-27 | 2004-09-24 | Telemetrisch abfragbarer passiver potentialsensor |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10361991A1 (de) |
WO (1) | WO2005033719A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2251712A3 (de) * | 2008-02-14 | 2011-06-08 | Isis Innovation Ltd | Drahtlose Rückstreuungsabfrage eines passiven, resonanten Sensor-LC-Tags und eines Referenz-Tags |
RU2427943C1 (ru) * | 2010-02-15 | 2011-08-27 | Открытое акционерное общество "Авангард" | Пассивный датчик на поверхностных акустических волнах |
EP2152149A4 (de) * | 2007-05-04 | 2013-05-15 | Univ Arizona | System und verfahren zur drahtlosen übertragung von biopotenzialen |
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 (ru) * | 2018-07-27 | 2020-01-30 | Научно-Технический Центр "Радиотехнических Устройств И Систем" С Ограниченной Ответственностью | Пассивный беспроводный датчик магнитного поля на поверхностных акустических волнах |
US11529194B2 (en) | 2016-03-31 | 2022-12-20 | Koninklijke Philips N.V. | Wireless position determination |
Families Citing this family (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2025631A (en) * | 1978-05-12 | 1980-01-23 | Kernforschungsz Karlsruhe | Measuring high frequency signals |
WO2000039596A1 (en) * | 1998-12-23 | 2000-07-06 | Voltage Vision Ltd. | Method and device for non-contact detection of external electric or magnetic fields |
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 |
-
2003
- 2003-09-27 DE DE10361991A patent/DE10361991A1/de not_active Ceased
-
2004
- 2004-09-24 WO PCT/EP2004/010714 patent/WO2005033719A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2025631A (en) * | 1978-05-12 | 1980-01-23 | Kernforschungsz Karlsruhe | Measuring high frequency signals |
WO2000039596A1 (en) * | 1998-12-23 | 2000-07-06 | Voltage Vision Ltd. | Method and device for non-contact detection of external electric or magnetic fields |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2152149A4 (de) * | 2007-05-04 | 2013-05-15 | Univ Arizona | System und verfahren zur drahtlosen übertragung von biopotenzialen |
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 (de) * | 2008-02-14 | 2011-06-08 | Isis Innovation Ltd | Drahtlose Rückstreuungsabfrage eines passiven, resonanten Sensor-LC-Tags und eines Referenz-Tags |
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 (ru) * | 2018-07-27 | 2020-01-30 | Научно-Технический Центр "Радиотехнических Устройств И Систем" С Ограниченной Ответственностью | Пассивный беспроводный датчик магнитного поля на поверхностных акустических волнах |
Also Published As
Publication number | Publication date |
---|---|
DE10361991A1 (de) | 2005-04-28 |
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