DE60142747D1 - Vorrichtung zur akustischen erkennung von partikeln in einer strömung unter verwendung eines faseroptischen interferometers - Google Patents
Vorrichtung zur akustischen erkennung von partikeln in einer strömung unter verwendung eines faseroptischen interferometersInfo
- Publication number
- DE60142747D1 DE60142747D1 DE60142747T DE60142747T DE60142747D1 DE 60142747 D1 DE60142747 D1 DE 60142747D1 DE 60142747 T DE60142747 T DE 60142747T DE 60142747 T DE60142747 T DE 60142747T DE 60142747 D1 DE60142747 D1 DE 60142747D1
- Authority
- DE
- Germany
- Prior art keywords
- particles
- flow
- fiber optic
- acoustic detection
- optic interferometer
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title 1
- 239000002245 particle Substances 0.000 title 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/107—Locating fluid leaks, intrusions or movements using acoustic means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
- E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Geophysics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Electromagnetism (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Optical Transform (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measuring Volume Flow (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20004554A NO315762B1 (no) | 2000-09-12 | 2000-09-12 | Sand-detektor |
PCT/NO2001/000352 WO2002023169A1 (en) | 2000-09-12 | 2001-08-30 | Apparatus for acoustic detection of particles in a flow using a fibre optic interferometer |
Publications (1)
Publication Number | Publication Date |
---|---|
DE60142747D1 true DE60142747D1 (de) | 2010-09-16 |
Family
ID=19911565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60142747T Expired - Lifetime DE60142747D1 (de) | 2000-09-12 | 2001-08-30 | Vorrichtung zur akustischen erkennung von partikeln in einer strömung unter verwendung eines faseroptischen interferometers |
Country Status (7)
Country | Link |
---|---|
US (1) | US7072044B2 (de) |
EP (1) | EP1332356B1 (de) |
AU (1) | AU2001282705A1 (de) |
CA (1) | CA2422037C (de) |
DE (1) | DE60142747D1 (de) |
NO (1) | NO315762B1 (de) |
WO (1) | WO2002023169A1 (de) |
Families Citing this family (70)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6801677B1 (en) * | 1998-09-10 | 2004-10-05 | The Regents Of The Universtiy Of California | Waveguide-based optical chemical sensor |
CN1723332B (zh) * | 2002-08-30 | 2010-10-27 | 高速传感器有限公司 | 采用纤维光学导线和传感器的测井系统 |
US7428054B2 (en) * | 2002-10-15 | 2008-09-23 | University Of Maryland | Micro-optical sensor system for pressure, acceleration, and pressure gradient measurements |
US7490664B2 (en) * | 2004-11-12 | 2009-02-17 | Halliburton Energy Services, Inc. | Drilling, perforating and formation analysis |
GB0522312D0 (en) * | 2005-11-01 | 2005-12-07 | Cormon Ltd | Monitoring particles in a fluid stream |
GB2433112B (en) * | 2005-12-06 | 2008-07-09 | Schlumberger Holdings | Borehole telemetry system |
GB0701558D0 (en) * | 2007-01-26 | 2007-03-07 | Insensys Oil & Gas Ltd | Fluid composition monitoring |
US20100181472A1 (en) * | 2007-04-09 | 2010-07-22 | Baker Hughes Incorporated | Method and Apparatus to Determine Characteristics of an Oil-Based Mud Downhole |
US20080245960A1 (en) * | 2007-04-09 | 2008-10-09 | Baker Hughes Incorporated | Method and Apparatus to Determine Characteristics of an Oil-Based Mud Downhole |
US8487238B2 (en) * | 2007-11-01 | 2013-07-16 | Baker Hughes Incorporated | Method of identification of petroleum compounds using frequency mixing on surfaces |
US9267330B2 (en) | 2008-08-20 | 2016-02-23 | Foro Energy, Inc. | Long distance high power optical laser fiber break detection and continuity monitoring systems and methods |
US9719302B2 (en) | 2008-08-20 | 2017-08-01 | Foro Energy, Inc. | High power laser perforating and laser fracturing tools and methods of use |
US9080425B2 (en) | 2008-10-17 | 2015-07-14 | Foro Energy, Inc. | High power laser photo-conversion assemblies, apparatuses and methods of use |
US9242309B2 (en) | 2012-03-01 | 2016-01-26 | Foro Energy Inc. | Total internal reflection laser tools and methods |
US9562395B2 (en) | 2008-08-20 | 2017-02-07 | Foro Energy, Inc. | High power laser-mechanical drilling bit and methods of use |
US9244235B2 (en) | 2008-10-17 | 2016-01-26 | Foro Energy, Inc. | Systems and assemblies for transferring high power laser energy through a rotating junction |
US9669492B2 (en) | 2008-08-20 | 2017-06-06 | Foro Energy, Inc. | High power laser offshore decommissioning tool, system and methods of use |
WO2010096086A1 (en) | 2008-08-20 | 2010-08-26 | Foro Energy Inc. | Method and system for advancement of a borehole using a high power laser |
US9089928B2 (en) | 2008-08-20 | 2015-07-28 | Foro Energy, Inc. | Laser systems and methods for the removal of structures |
US9138786B2 (en) | 2008-10-17 | 2015-09-22 | Foro Energy, Inc. | High power laser pipeline tool and methods of use |
US9347271B2 (en) | 2008-10-17 | 2016-05-24 | Foro Energy, Inc. | Optical fiber cable for transmission of high power laser energy over great distances |
US9027668B2 (en) | 2008-08-20 | 2015-05-12 | Foro Energy, Inc. | Control system for high power laser drilling workover and completion unit |
US9664012B2 (en) | 2008-08-20 | 2017-05-30 | Foro Energy, Inc. | High power laser decomissioning of multistring and damaged wells |
US8627901B1 (en) | 2009-10-01 | 2014-01-14 | Foro Energy, Inc. | Laser bottom hole assembly |
US9360631B2 (en) | 2008-08-20 | 2016-06-07 | Foro Energy, Inc. | Optics assembly for high power laser tools |
US8571368B2 (en) | 2010-07-21 | 2013-10-29 | Foro Energy, Inc. | Optical fiber configurations for transmission of laser energy over great distances |
US10301912B2 (en) * | 2008-08-20 | 2019-05-28 | Foro Energy, Inc. | High power laser flow assurance systems, tools and methods |
WO2010045286A1 (en) * | 2008-10-14 | 2010-04-22 | Schlumberger Canada Limited | Polarization-diverse, heterodyne optical receiving system |
US8315486B2 (en) * | 2009-02-09 | 2012-11-20 | Shell Oil Company | Distributed acoustic sensing with fiber Bragg gratings |
CA2766165C (en) | 2009-06-29 | 2015-03-31 | Halliburton Energy Services, Inc. | Wellbore laser operations |
US8783361B2 (en) | 2011-02-24 | 2014-07-22 | Foro Energy, Inc. | Laser assisted blowout preventer and methods of use |
US8684088B2 (en) | 2011-02-24 | 2014-04-01 | Foro Energy, Inc. | Shear laser module and method of retrofitting and use |
US8783360B2 (en) | 2011-02-24 | 2014-07-22 | Foro Energy, Inc. | Laser assisted riser disconnect and method of use |
US8720584B2 (en) | 2011-02-24 | 2014-05-13 | Foro Energy, Inc. | Laser assisted system for controlling deep water drilling emergency situations |
US8930143B2 (en) | 2010-07-14 | 2015-01-06 | Halliburton Energy Services, Inc. | Resolution enhancement for subterranean well distributed optical measurements |
US8584519B2 (en) * | 2010-07-19 | 2013-11-19 | Halliburton Energy Services, Inc. | Communication through an enclosure of a line |
WO2012024285A1 (en) | 2010-08-17 | 2012-02-23 | Foro Energy Inc. | Systems and conveyance structures for high power long distance laster transmission |
WO2012116155A1 (en) | 2011-02-24 | 2012-08-30 | Foro Energy, Inc. | Electric motor for laser-mechanical drilling |
US8692183B2 (en) * | 2011-03-07 | 2014-04-08 | Baker Hughes Incorporated | Method and apparatus for estimating a downhole fluid property using a miniature integrated circuit spectrometer |
WO2012167102A1 (en) | 2011-06-03 | 2012-12-06 | Foro Energy Inc. | Rugged passively cooled high power laser fiber optic connectors and methods of use |
BR112015004458A8 (pt) | 2012-09-01 | 2019-08-27 | Chevron Usa Inc | sistema de controle de poço, bop a laser e conjunto de bop |
US9823373B2 (en) | 2012-11-08 | 2017-11-21 | Halliburton Energy Services, Inc. | Acoustic telemetry with distributed acoustic sensing system |
US9575209B2 (en) | 2012-12-22 | 2017-02-21 | Halliburton Energy Services, Inc. | Remote sensing methods and systems using nonlinear light conversion and sense signal transformation |
US9091785B2 (en) | 2013-01-08 | 2015-07-28 | Halliburton Energy Services, Inc. | Fiberoptic systems and methods for formation monitoring |
US10241229B2 (en) | 2013-02-01 | 2019-03-26 | Halliburton Energy Services, Inc. | Distributed feedback fiber laser strain sensor systems and methods for subsurface EM field monitoring |
CN103226205B (zh) * | 2013-04-26 | 2015-04-08 | 武汉理工大学 | 一种激光等离子体冲击波力学效应的光纤传感测量方法 |
CA2954211C (en) * | 2014-07-04 | 2023-03-07 | Hifi Engineering Inc. | Method and system for detecting dynamic strain |
WO2016085511A1 (en) | 2014-11-26 | 2016-06-02 | Halliburton Energy Services, Inc. | Onshore electromagnetic reservoir monitoring |
CA2972616C (en) | 2015-01-19 | 2022-11-29 | Domino Taverner | Transducers and acoustic emitters for fiber-optic-based acoustic sensing |
US9651706B2 (en) | 2015-05-14 | 2017-05-16 | Halliburton Energy Services, Inc. | Fiberoptic tuned-induction sensors for downhole use |
US10711602B2 (en) | 2015-07-22 | 2020-07-14 | Halliburton Energy Services, Inc. | Electromagnetic monitoring with formation-matched resonant induction sensors |
US10221687B2 (en) | 2015-11-26 | 2019-03-05 | Merger Mines Corporation | Method of mining using a laser |
CA3009894C (en) | 2016-01-25 | 2020-10-13 | Halliburton Energy Services, Inc. | Electromagnetic telemetry using a transceiver in an adjacent wellbore |
WO2017151089A1 (en) * | 2016-02-29 | 2017-09-08 | Halliburton Energy Services, Inc. | Fixed-wavelength fiber optic telemetry for casing collar locator signals |
US11530606B2 (en) | 2016-04-07 | 2022-12-20 | Bp Exploration Operating Company Limited | Detecting downhole sand ingress locations |
US11199084B2 (en) | 2016-04-07 | 2021-12-14 | Bp Exploration Operating Company Limited | Detecting downhole events using acoustic frequency domain features |
US10698427B2 (en) | 2016-10-31 | 2020-06-30 | Ge Oil & Gas Pressure Control Lp | System and method for assessing sand flow rate |
EP3583296B1 (de) | 2017-03-31 | 2021-07-21 | BP Exploration Operating Company Limited | Bohrloch- und abraumüberwachung mithilfe verteilter akustiksensoren |
AU2018321150A1 (en) | 2017-08-23 | 2020-03-12 | Bp Exploration Operating Company Limited | Detecting downhole sand ingress locations |
EA202090867A1 (ru) | 2017-10-11 | 2020-09-04 | Бп Эксплорейшн Оперейтинг Компани Лимитед | Обнаружение событий с использованием признаков в области акустических частот |
EP3775486A4 (de) * | 2018-03-28 | 2021-12-29 | Conocophillips Company | Beurteilung von niederfrequenz-das-bohrlochinterferenz |
US11859488B2 (en) | 2018-11-29 | 2024-01-02 | Bp Exploration Operating Company Limited | DAS data processing to identify fluid inflow locations and fluid type |
GB201820331D0 (en) | 2018-12-13 | 2019-01-30 | Bp Exploration Operating Co Ltd | Distributed acoustic sensing autocalibration |
US20200355838A1 (en) * | 2019-05-10 | 2020-11-12 | Halliburton Energy Services, Inc. | Detection and quantification of sand flows in a borehole |
WO2021073741A1 (en) | 2019-10-17 | 2021-04-22 | Lytt Limited | Fluid inflow characterization using hybrid das/dts measurements |
CA3154435C (en) | 2019-10-17 | 2023-03-28 | Lytt Limited | Inflow detection using dts features |
CN112727437B (zh) * | 2019-10-28 | 2024-03-22 | 中国石油化工股份有限公司 | 自适应超声相控阵列出砂在线监测系统及方法 |
WO2021093974A1 (en) | 2019-11-15 | 2021-05-20 | Lytt Limited | Systems and methods for draw down improvements across wellbores |
WO2021249643A1 (en) | 2020-06-11 | 2021-12-16 | Lytt Limited | Systems and methods for subterranean fluid flow characterization |
EP4168647A1 (de) | 2020-06-18 | 2023-04-26 | Lytt Limited | Ereignismodelltraining unter verwendung von in-situ-daten |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841144A (en) * | 1972-10-12 | 1974-10-15 | Mobil Oil Corp | Sand detection probe |
US3906780A (en) * | 1972-10-12 | 1975-09-23 | Mobil Oil Corp | Particulate material detection means |
FR2490912A1 (fr) * | 1980-08-28 | 1982-03-26 | Comp Generale Electricite | Hydrophone a fibre optique |
SU1638580A1 (ru) * | 1988-08-01 | 1991-03-30 | Дальневосточный политехнический институт им.В.В.Куйбышева | Устройство дл измерени акустического давлени |
US5245290A (en) * | 1989-02-27 | 1993-09-14 | Matec Applied Sciences, Inc. | Device for determining the size and charge of colloidal particles by measuring electroacoustic effect |
DE4224744A1 (de) | 1992-07-27 | 1994-02-03 | Abb Research Ltd | Vorrichtung zur Detektion loser Metallteilchen in gasisolierten Hochspannungs-Schaltanlagen |
GB9324333D0 (en) | 1993-11-26 | 1994-01-12 | Sensor Dynamics Ltd | Measurement of one or more physical parameters |
NO302441B1 (no) * | 1995-03-20 | 1998-03-02 | Optoplan As | Fiberoptisk endepumpet fiber-laser |
US5625724A (en) * | 1996-03-06 | 1997-04-29 | Litton Systems, Inc | Fiber optic hydrophone having rigid mandrel |
US5767411A (en) * | 1996-12-31 | 1998-06-16 | Cidra Corporation | Apparatus for enhancing strain in intrinsic fiber optic sensors and packaging same for harsh environments |
US5925879A (en) * | 1997-05-09 | 1999-07-20 | Cidra Corporation | Oil and gas well packer having fiber optic Bragg Grating sensors for downhole insitu inflation monitoring |
US6082185A (en) * | 1997-07-25 | 2000-07-04 | Research International, Inc. | Disposable fluidic circuit cards |
US6016702A (en) * | 1997-09-08 | 2000-01-25 | Cidra Corporation | High sensitivity fiber optic pressure sensor for use in harsh environments |
US6300082B1 (en) * | 1998-03-20 | 2001-10-09 | Ia, Inc. | Method and apparatus for measurement of the effect of test compounds on signal transduction at the level of biological receptors |
US6490931B1 (en) * | 1998-12-04 | 2002-12-10 | Weatherford/Lamb, Inc. | Fused tension-based fiber grating pressure sensor |
US6422084B1 (en) * | 1998-12-04 | 2002-07-23 | Weatherford/Lamb, Inc. | Bragg grating pressure sensor |
US6233374B1 (en) * | 1999-06-04 | 2001-05-15 | Cidra Corporation | Mandrel-wound fiber optic pressure sensor |
US6626043B1 (en) * | 2000-01-31 | 2003-09-30 | Weatherford/Lamb, Inc. | Fluid diffusion resistant glass-encased fiber optic sensor |
US6601671B1 (en) * | 2000-07-10 | 2003-08-05 | Weatherford/Lamb, Inc. | Method and apparatus for seismically surveying an earth formation in relation to a borehole |
-
2000
- 2000-09-12 NO NO20004554A patent/NO315762B1/no not_active IP Right Cessation
-
2001
- 2001-08-30 AU AU2001282705A patent/AU2001282705A1/en not_active Abandoned
- 2001-08-30 US US10/363,760 patent/US7072044B2/en not_active Expired - Lifetime
- 2001-08-30 DE DE60142747T patent/DE60142747D1/de not_active Expired - Lifetime
- 2001-08-30 EP EP01961443A patent/EP1332356B1/de not_active Expired - Lifetime
- 2001-08-30 CA CA002422037A patent/CA2422037C/en not_active Expired - Lifetime
- 2001-08-30 WO PCT/NO2001/000352 patent/WO2002023169A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1332356B1 (de) | 2010-08-04 |
NO315762B1 (no) | 2003-10-20 |
WO2002023169A1 (en) | 2002-03-21 |
EP1332356A1 (de) | 2003-08-06 |
NO20004554L (no) | 2002-03-13 |
US7072044B2 (en) | 2006-07-04 |
CA2422037C (en) | 2007-05-29 |
CA2422037A1 (en) | 2002-03-21 |
NO20004554D0 (no) | 2000-09-12 |
US20040033017A1 (en) | 2004-02-19 |
AU2001282705A1 (en) | 2002-03-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60142747D1 (de) | Vorrichtung zur akustischen erkennung von partikeln in einer strömung unter verwendung eines faseroptischen interferometers | |
DE69622417D1 (de) | Vorrichtung zur akustischen messung des durchflusses einer flüssigkeit | |
DE602004007760D1 (de) | Optische Vorrichtung zur Messung des Abstandes zwischen der Vorrichtung und einer Fläche | |
DE69729701D1 (de) | Vorrichtung zur Messung der Refraktion eines Auges | |
DE69531925D1 (de) | Vorrichtung zur Messung einer Eigenschaft eines Fluides | |
DE69705564D1 (de) | Vorrichtung zur Aufnahme eines linearisierten faseroptischen Verstärkers | |
DE10161308B8 (de) | Optisches System und Verfahren zur Detektion eines Leistungspegels einer Quelle | |
DE69927274D1 (de) | Nichtintrusiver faseroptischer drucksensor zur messung von druckänderungen in einem rohr | |
DE60142248D1 (de) | Verfahren und anordnung zur abfrage von faseroptischen sensoren | |
DE50205077D1 (de) | Vorrichtung zur Lagerung eines optischen Elementes in einer Optik | |
DE502004011733D1 (de) | Verfahren und optisches system zur vermessung der topographie eines messobjekts | |
DE59905887D1 (de) | Faserlaser-sensor zur messung von differentiellen drücken und von strömungsgeschwindigkeiten | |
GB0217710D0 (en) | Methods and apparatus for measuring differential pressure with fiber optic sensor systems | |
DE60117211D1 (de) | Nachweis von Liganden unter Verwendung von lichtbrechenden Oberflächen-Verfahren | |
DE69719238D1 (de) | Optische Vorrichtung zur Messung von Streulicht | |
DE60013669D1 (de) | Verfahren und Vorrichtung zur Bestimmung des optischen Bedrohungsabstands in einer optischen Faser | |
DE60212054D1 (de) | Generator zur Verwendung in einer mikroelektromechanischen Vorrichtung | |
DE50101160D1 (de) | Vorrichtung zum hydrodynamischen Beaufschlagen der Fasern einer Faserbahn mit einem Fluid | |
DE60033142D1 (de) | Verfahren und vorrichtung zur erhöhung des dynamikbereichs, der empfindlichkeit, der genauigkeit und der auflösung in faseroptischen sensorsystemen | |
DE60116163D1 (de) | Dämpfungselement zur Verwendung in einem faseroptischen Adapter | |
DE69916511D1 (de) | Vorrichtung zum optischen Detektieren der Anwesenheit eines Gegenstandes | |
DE60202982D1 (de) | Vorrichtung zur Messung des Blutdruckes unter Verwendung eines linearvariierenden Luftdruckes | |
DE50213746D1 (de) | Verfahren zur Messung des Abstands eines an einer Referenzfläche vorbei gefürhrten Bauteils und Durchführung des Verfahrens | |
DE60031502D1 (de) | Verfahren und Vorrichtung zur Typbestimmung eines Formblatts | |
DE19882965T1 (de) | Verfahren zur Messung des Augeninnendrucks über das Augenlid und Vorrichtung zur Durchführung des Verfahrens |