BR9908314A - Sensores de pressão com grade de bragg, compreendendo um sensor de temperatura integrado com grade de bragg integrada por fibras - Google Patents

Sensores de pressão com grade de bragg, compreendendo um sensor de temperatura integrado com grade de bragg integrada por fibras

Info

Publication number
BR9908314A
BR9908314A BR9908314-0A BR9908314A BR9908314A BR 9908314 A BR9908314 A BR 9908314A BR 9908314 A BR9908314 A BR 9908314A BR 9908314 A BR9908314 A BR 9908314A
Authority
BR
Brazil
Prior art keywords
fiber
integrated
bragg grid
pressure
temperature
Prior art date
Application number
BR9908314-0A
Other languages
English (en)
Inventor
Klaus Bohnert
Hubert Braendle
Patrick Bodor
Original Assignee
Abb Research Ltd
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 Abb Research Ltd filed Critical Abb Research Ltd
Publication of BR9908314A publication Critical patent/BR9908314A/pt

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0007—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using photoelectric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
    • G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0026—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means
    • G01L9/0032—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means using photoelectric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Fluid Pressure (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

Patente de Invenção: <B>"SENSORES DE PRESSãO COM GRADE DE BRAGG, COMPREENDENDO UM SENSOR DE TEMPERATURA INTEGRADO COM GRADE DE BRAGG INTEGRADA POR FIBRAS"<D>. A invenção refere-se a um sensor de pressão codificado por comprimento de onda (1) com grade de Bragg integrada por fibras, que é especialmente conveniente para emprego sob altas pressões e temperaturas em poços petrolíferos. O princípio de sensor proporcionado na invenção é baseado sobre o fato de que a pressão hidrostática de um meio líquido ou gasoso (11) é convertida por intermédio de um transdutor (1) em um alongamento ou compressão longitudinal da fibra. O transdutor (1) compreende um cilindro de medição de pressão (7b) que é protegido contra o meio (11) ou submetido a uma contrapressão. Transdutores de temperatura compensada (1) comum comprimento de onda de Bragg independente de temperatura <sym> ~ B~ podem ser obtidos devido a uma dependência de temperatura da protensão mecânica da fibra sensora de pressão (3) ser obtida através da seleção dos materiais, comprimentos e disposições do suporte retentor de fibra (5a, 5b). Um sensor de temperatura de grade de Bragg integrado por fibras (19, 20) também pode ser proporcionado. A invenção adicionalmente refere-se a transdutores 1) com diferentes disposições de cilindro (7a,7b) e uma configuração de multiplexação de comprimento de onda compreendendo vários transdutores (1).
BR9908314-0A 1998-02-27 1999-02-12 Sensores de pressão com grade de bragg, compreendendo um sensor de temperatura integrado com grade de bragg integrada por fibras BR9908314A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19808222A DE19808222A1 (de) 1998-02-27 1998-02-27 Faser-Bragg-Gitter Drucksensor mit integrierbarem Faser-Bragg-Gitter Temperatursensor
PCT/CH1999/000065 WO1999044026A1 (de) 1998-02-27 1999-02-12 Faser-bragg-gitter-drucksensor mit integrierbarem faser-bragg-gitter-temperatursensor

Publications (1)

Publication Number Publication Date
BR9908314A true BR9908314A (pt) 2000-11-07

Family

ID=7859051

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9908314-0A BR9908314A (pt) 1998-02-27 1999-02-12 Sensores de pressão com grade de bragg, compreendendo um sensor de temperatura integrado com grade de bragg integrada por fibras

Country Status (7)

Country Link
US (1) US6563970B1 (pt)
EP (1) EP1058822B1 (pt)
AU (1) AU3244099A (pt)
BR (1) BR9908314A (pt)
DE (2) DE19808222A1 (pt)
NO (1) NO321400B1 (pt)
WO (1) WO1999044026A1 (pt)

Families Citing this family (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6768825B2 (en) * 1998-05-06 2004-07-27 Weatherford/Lamb, Inc. Optical sensor device having creep-resistant optical fiber attachments
US6507693B2 (en) 1998-05-06 2003-01-14 Cidra Corporation Optical filter device having creep-resistant optical fiber attachments
US6317555B1 (en) 1998-05-06 2001-11-13 Cidra Corporation Creep-resistant optical fiber attachment
US6490931B1 (en) 1998-12-04 2002-12-10 Weatherford/Lamb, Inc. Fused tension-based fiber grating pressure sensor
CA2353567C (en) 1998-12-04 2007-11-20 Cidra Corporation Bragg grating pressure sensor
US6519388B1 (en) 1998-12-04 2003-02-11 Cidra Corporation Tube-encased fiber grating
CN1153054C (zh) 1998-12-04 2004-06-09 塞德拉公司 布拉格光栅压力传感器
CN1329722A (zh) 1998-12-04 2002-01-02 塞德拉公司 压缩调谐的布拉格光栅和激光器
AU3111900A (en) 1998-12-04 2000-06-19 Cidra Corporation Pressure-isolated bragg grating temperature sensor
US6278811B1 (en) 1998-12-04 2001-08-21 Arthur D. Hay Fiber optic bragg grating pressure sensor
DE69942749D1 (de) 1998-12-04 2010-10-21 Cidra Corp Spannungsisolierter temperatursensor mit einem bragg-gitter
CA2644216C (en) * 1998-12-17 2011-02-08 University Of Southampton Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments
US6766703B1 (en) 1999-02-05 2004-07-27 Sensor Dynamics Limited Apparatus and method for enhancing remote sensor performance and utility
DE19938978A1 (de) * 1999-08-19 2001-02-22 Abb Research Ltd Faseroptischer Drucksensor
US6439055B1 (en) 1999-11-15 2002-08-27 Weatherford/Lamb, Inc. Pressure sensor assembly structure to insulate a pressure sensing device from harsh environments
US6626043B1 (en) 2000-01-31 2003-09-30 Weatherford/Lamb, Inc. Fluid diffusion resistant glass-encased fiber optic sensor
GB2360584B (en) * 2000-03-25 2004-05-19 Abb Offshore Systems Ltd Monitoring fluid flow through a filter
EP1179727A1 (de) * 2000-08-02 2002-02-13 Abb Research Ltd. Faser-Bragg-Gitter Sensor zur Druck- und Dichtemessung
US6558036B2 (en) * 2000-11-29 2003-05-06 Weatherford/Lamb, Inc. Non-intrusive temperature sensor for measuring internal temperature of fluids within pipes
US20020076132A1 (en) * 2000-12-15 2002-06-20 Peral Eva M. Optical filter for simultaneous single sideband modulation and wavelength stabilization
GB0103666D0 (en) * 2001-02-15 2001-03-28 Secr Defence Road traffic monitoring system
US6993220B2 (en) * 2001-06-20 2006-01-31 The Furukawa Electric Co., Ltd. Temperature-compensated optical fiber component
JP2003008141A (ja) * 2001-06-26 2003-01-10 Sumitomo Electric Ind Ltd 発光デバイス、光モジュール、及びファイバスタブ部品
EP1279975A1 (en) * 2001-07-24 2003-01-29 Alcatel Device comprising a Bragg grating optical fiber tunable by a piezoelectric actuator
US6898339B2 (en) * 2002-12-16 2005-05-24 Schlumberger Technology Corporation Multiple mode pre-loadable fiber optic pressure and temperature sensor
TW584749B (en) * 2002-12-30 2004-04-21 Chow-Shing Shin Temperature compensation method of fiber device
NO20032119D0 (no) * 2003-05-12 2003-05-12 Nexans Overvåkingskabel
EP1664706B1 (en) * 2003-09-04 2011-07-27 Baker Hughes Incorporated Optical sensor with co-located pressure and temperature sensors
EP1942324B1 (en) 2003-09-04 2012-04-11 Baker Hughes Incorporated Optical sensor with co-located pressure and temperature sensors
US7104141B2 (en) * 2003-09-04 2006-09-12 Baker Hughes Incorporated Optical sensor with co-located pressure and temperature sensors
US7241986B2 (en) * 2003-10-08 2007-07-10 Mississippi State University Fiber ringdown pressure/force sensors
US20060245692A1 (en) * 2004-04-01 2006-11-02 Lxsix Photonics Inc. Package for temperature sensitive optical device
US7323677B1 (en) 2004-07-15 2008-01-29 Mississippi State University Fiber-bragg grating-loop ringdown method and apparatus
US7196318B2 (en) * 2004-07-16 2007-03-27 Kin-Man Yip Fiber-optic sensing system
BRPI0403786A (pt) * 2004-09-09 2006-05-02 Petroleo Brasileiro Sa transdutor de pressão diferencial a fibra óptica
US8075498B2 (en) * 2005-03-04 2011-12-13 Endosense Sa Medical apparatus system having optical fiber load sensing capability
US8182433B2 (en) * 2005-03-04 2012-05-22 Endosense Sa Medical apparatus system having optical fiber load sensing capability
CA2600888A1 (en) * 2005-03-10 2006-09-14 Commonwealth Scientific And Industrial Research Organisation Temperature compensating bragg grating optical device
WO2006094351A1 (en) * 2005-03-10 2006-09-14 Commonwealth Scientific And Industrial Research Organisation An apparatus for pressure sensing
WO2006094353A1 (en) * 2005-03-10 2006-09-14 Commonwealth Scientific And Industrial Research Organisation An apparatus for pressure sensing
US8894589B2 (en) 2005-08-01 2014-11-25 Endosense Sa Medical apparatus system having optical fiber load sensing capability
WO2008054429A2 (en) * 2005-11-15 2008-05-08 Zolo Technologies, Inc. All-fiber architecture for an embedded flight sensor for aeropropulsion applications
US7561776B2 (en) * 2005-11-29 2009-07-14 Petrospec Engineering Ltd. Method of preventing hydrogen darkening of optic fibre
US8048063B2 (en) * 2006-06-09 2011-11-01 Endosense Sa Catheter having tri-axial force sensor
US8567265B2 (en) 2006-06-09 2013-10-29 Endosense, SA Triaxial fiber optic force sensing catheter
WO2007149733A2 (en) * 2006-06-19 2007-12-27 Baker Hughes Incorporated Isolated sensor housing
US20110019177A1 (en) * 2006-08-16 2011-01-27 Schlumberger Technology Corporation Fiber-optic transducer for fluid and/ or gas velocity measurement
CN100514014C (zh) * 2006-12-13 2009-07-15 中国科学院半导体研究所 光纤管道液压传感器
DE102007008464B4 (de) * 2007-02-19 2012-01-05 Hottinger Baldwin Messtechnik Gmbh Optischer Dehnungsmessstreifen
US8186428B2 (en) * 2007-04-03 2012-05-29 Baker Hughes Incorporated Fiber support arrangement for a downhole tool and method
US7729567B2 (en) * 2007-05-14 2010-06-01 The Hong Kong Polytechnic University Fiber optic transducer for simultaneous pressure and temperature measurement in fluid flow
US8157789B2 (en) * 2007-05-24 2012-04-17 Endosense Sa Touch sensing catheter
US8622935B1 (en) 2007-05-25 2014-01-07 Endosense Sa Elongated surgical manipulator with body position and distal force sensing
US8298227B2 (en) * 2008-05-14 2012-10-30 Endosense Sa Temperature compensated strain sensing catheter
WO2010123566A1 (en) 2009-04-22 2010-10-28 Lxdata Inc. Pressure sensor arrangement using an optical fiber and methodologies for performing an analysis of a subterranean formation
US9476294B2 (en) * 2010-01-29 2016-10-25 Baker Hughes Incorporated Device and method for discrete distributed optical fiber pressure sensing
CN101793573A (zh) * 2010-03-26 2010-08-04 昆明理工大学 压力管道的fbg在线监测方法
CA2830281C (en) * 2010-03-30 2016-09-06 Uvic Industry Partnerships Inc. Multi-point pressure sensor and uses thereof
CN102243093B (zh) * 2010-05-13 2013-08-07 张继昌 光纤重量分选秤及其称重方法
US8662165B2 (en) 2010-07-06 2014-03-04 Baker Hughes Incorporated Fiber support arrangement and method
US20120224801A1 (en) * 2011-03-04 2012-09-06 Baker Hughes Incorporated Fiber optic sealing apparatus
CN102121378B (zh) * 2011-03-07 2013-04-24 中国海洋石油总公司 一种测量井下压力的光纤传感器
CN103607961B (zh) 2011-04-14 2016-12-14 圣犹达医疗用品卢森堡控股有限公司 用于导管的紧凑型力传感器
FR2974263B1 (fr) * 2011-04-14 2014-10-24 Thales Sa Hydrophone tout optique insensible a la temperature et a la pression statique
US8701500B2 (en) 2011-12-02 2014-04-22 Lake Shore Cryotronics, Inc. Method and apparatus for fixing strained optical fibers against creep and temperature and strain sensors using said technology
ES2556810T3 (es) * 2012-02-07 2016-01-20 Sensoptic Sa Elemento óptico sensor de fuerza e instrumento microquirúrgico
WO2014012173A1 (en) * 2012-07-20 2014-01-23 Advanced Test And Automation Inc. System and method for measuring torque
EP2696182A1 (en) 2012-08-10 2014-02-12 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO Optical sensor and method for measuring the pressure of a fluid
US20140123764A1 (en) * 2012-11-05 2014-05-08 Mohammad Abtahi Fiber Bragg Grating Pressure Sensor with Adjustable Sensitivity
CN103017972B (zh) * 2012-11-26 2015-06-10 山东大学 基于杠杆原理的布拉格光栅压力盒及测试方法
CN103017973B (zh) * 2013-01-05 2014-12-17 北京遥测技术研究所 耐高温微压光纤光栅传感器
GB2511803B (en) 2013-03-14 2015-07-29 Kidde Tech Inc Pneumatic sensing apparatus
CA2882549C (en) * 2013-11-08 2016-08-16 Valery Sheverev A sensor for monitoring rheologically complex flows
NL1040505C2 (en) * 2013-11-19 2015-05-26 Beethoven Marine Systems B V Sensor for detecting pressure waves in a fluid, provided with static pressure compensation.
WO2015142343A1 (en) * 2014-03-20 2015-09-24 Halliburton Energy Services, Inc. Temperature-compensated strain-based transducer operating on differential measurements
US9952067B2 (en) 2015-05-06 2018-04-24 Kulite Semiconductor Products, Inc. Systems and methods for optical measurements using multiple beam interferometric sensors
US9810594B2 (en) 2015-01-08 2017-11-07 Kulite Semiconductor Products, Inc. Thermally stable high temperature pressure and acceleration optical interferometric sensors
CN104567709B (zh) * 2015-01-14 2017-05-10 广州大学 一种王字形的光纤光栅传感器贴片
US9448312B1 (en) * 2015-03-11 2016-09-20 Baker Hughes Incorporated Downhole fiber optic sensors with downhole optical interrogator
EP3073240B1 (en) * 2015-03-24 2017-12-20 Westinghouse Electric Sweden AB Method of controlling pressure in a fuel rod
CN104895559B (zh) * 2015-05-25 2017-09-15 中国石油集团渤海钻探工程有限公司 油气井井下光纤温度压力测试仪器
JP6691602B2 (ja) 2016-01-07 2020-04-28 セント・ジュード・メディカル・インターナショナル・ホールディング・エスエーアールエルＳｔ． Ｊｕｄｅ Ｍｅｄｉｃａｌ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｈｏｌｄｉｎｇ Ｓ．ａ，ｒ．ｌ． 光学的感知のためのマルチ・コア・ファイバを有する医療デバイス
EP3425343B1 (en) * 2016-03-01 2024-11-27 Cmiws Co., Ltd. Optical fiber sensor
US10408694B2 (en) * 2016-06-07 2019-09-10 Halliburton Energy Services, Inc. Method to compensate measurement error of fiber Bragg grating sensor caused by hydrogen darkening
NL2017647B1 (en) * 2016-10-20 2018-04-26 Fugro Tech Bv Probe for determining soil properties
US9964698B1 (en) * 2016-10-28 2018-05-08 The Boeing Company Multicore optical fiber cable strain enhancement
US10641963B2 (en) 2017-04-27 2020-05-05 The Charles Stark Draper Laboratory, Inc. Polarization-based filter stabilization of broadband light sources
CA3083731C (en) * 2017-11-10 2023-02-28 Baker Hughes, A Ge Company, Llc Multi-cavity all-glass interferometric sensor for measuring high pressure and temperature
WO2019212048A1 (ja) * 2018-05-04 2019-11-07 株式会社シミウス 開閉検知センサ
CN109520666B (zh) 2019-01-03 2020-07-14 大连理工大学 一种管道内部压强的无损监测方法
CN111083403B (zh) 2019-12-11 2021-07-06 中国电子科技集团公司第四十四研究所 一种片内复用型像素控制电路
US12203812B2 (en) 2021-03-01 2025-01-21 Copeland Cold Chain Lp Bracket for temperature sensor
CN113983945B (zh) * 2021-12-28 2022-03-22 南京牧镭激光科技有限公司 控制光纤光栅中心波长的传感器制作装置
CN117738386B (zh) * 2024-02-18 2024-05-07 北京市建筑工程研究院有限责任公司 一种光纤光栅智能钢绞线和建筑用预应力结构构件
PL448744A1 (pl) * 2024-06-03 2024-12-02 Politechnika Lubelska Zestaw i sposób do określania ciśnienia w czasie rzeczywistym w próżniowych komorachgaszeniowych średniego napięcia

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761073A (en) 1984-08-13 1988-08-02 United Technologies Corporation Distributed, spatially resolving optical fiber strain gauge
DE3929290A1 (de) * 1989-09-04 1991-03-07 Klaus Prof Dr Kerl Interferometrische sensorsysteme
US5042898A (en) * 1989-12-26 1991-08-27 United Technologies Corporation Incorporated Bragg filter temperature compensated optical waveguide device
US5113070A (en) * 1991-03-29 1992-05-12 Abb Vetco Gray Inc. Temperature compensator for an optic fiber pressure transducer
GB9203471D0 (en) * 1992-02-19 1992-04-08 Sensor Dynamics Ltd Optical fibre pressure sensor
US5397891A (en) * 1992-10-20 1995-03-14 Mcdonnell Douglas Corporation Sensor systems employing optical fiber gratings
US5414507A (en) * 1993-04-01 1995-05-09 Hughes Aircraft Company Fiber optics pressure sensor transducer having a temperature compensator
US5426297A (en) * 1993-09-27 1995-06-20 United Technologies Corporation Multiplexed Bragg grating sensors
DE4337402A1 (de) * 1993-10-26 1995-04-27 Mannesmann Ag Sonde zur Messung von Druck- und Temperaturprofilen
US5469520A (en) * 1994-09-30 1995-11-21 United Technologies Corporation Compression-tuned fiber grating
US5684297A (en) * 1994-11-17 1997-11-04 Alcatel Cable Method of detecting and/or measuring physical magnitudes using a distributed sensor
US5612778A (en) * 1995-10-18 1997-03-18 Harris Corp. Fiber optic sensor for multiple variables
DE19648403C1 (de) * 1996-11-22 1998-04-02 Thomas Dr Ing Nagel Sensor zur Erfassung von Druck- und/oder Zugkräften
US5877426A (en) 1997-06-27 1999-03-02 Cidra Corporation Bourdon tube pressure gauge with integral optical strain sensors for measuring tension or compressive strain
NO305004B1 (no) * 1997-06-30 1999-03-15 Optoplan As Trykksensor
US6278811B1 (en) * 1998-12-04 2001-08-21 Arthur D. Hay Fiber optic bragg grating pressure sensor
US6304686B1 (en) * 2000-02-09 2001-10-16 Schlumberger Technology Corporation Methods and apparatus for measuring differential pressure with fiber optic sensor systems

Also Published As

Publication number Publication date
NO20004276D0 (no) 2000-08-25
EP1058822B1 (de) 2004-07-21
US6563970B1 (en) 2003-05-13
AU3244099A (en) 1999-09-15
EP1058822A1 (de) 2000-12-13
NO321400B1 (no) 2006-05-08
NO20004276L (no) 2000-10-18
DE59910014D1 (de) 2004-08-26
WO1999044026A1 (de) 1999-09-02
DE19808222A1 (de) 1999-09-02

Similar Documents

Publication Publication Date Title
BR9908314A (pt) Sensores de pressão com grade de bragg, compreendendo um sensor de temperatura integrado com grade de bragg integrada por fibras
US7437027B2 (en) Isolated sensor housing
BR9916623A (pt) Sensor reticular de fibra de bragg para medição de pressões diferenciais e taxas de fluxo
Zhao et al. Differential FBG sensor for temperature-compensated high-pressure (or displacement) measurement
ES2129841T3 (es) Sensor de fuerza o de alargamiento.
AR014835A1 (es) Instrumento para medir las propiedades compresivas de un cuerpo
CA2469444A1 (en) Optical accelerometer or displacement device using a flexure system
BR0114748A (pt) Sensor laser de fibra anisotrópica com acoplamento por reação distribuìda
NO334754B1 (no) Anordning og fremgangsmåte for avføling av påkjenning på et område av en fôring i en hydrokarbonbrønn
BRPI0414871A (pt) sensor de pressão fabry-perot reforçado
WO1998029717A1 (en) Apparatus for enhancing strain in intrinsic fiber optic sensors and packaging same for harsh environments
FR2380546A1 (fr) Procede et dispositif pour mesurer la pression d&#39;un fluide
BRPI0404129A (pt) Sensor de ph a fibra óptica
BRPI0403786A (pt) transdutor de pressão diferencial a fibra óptica
Pinet et al. Health monitoring with optical fiber sensors: from human body to civil structures
BR0006987A (pt) Sonda de medida de pressão diferencial com ruìdo reduzido
BR0304148A (pt) Aparelho de detecção de pressão
CN100561155C (zh) 温度不敏感光纤光栅应力传感器
Yang et al. Temperature-compensated high pressure FBG sensor with a bulk-modulus and self-demodulation method
BR9806255A (pt) Compressor de fluido.
SE9404064D0 (sv) Anordning vid koncentrationsgivare
DK0775303T3 (da) Trykmåler til meget høje tryk med pladeformet Bourdon-element
NO960779D0 (no) Trykkmåler
AR011326A1 (es) Instrumento para la deteccion del peso de fluido que elevan las bombas en los pozos de produccion de petroleo
Yamate et al. Transversely loaded Bragg grating pressure transducer with mechanically enhancing the sensitivity

Legal Events

Date Code Title Description
B25A Requested transfer of rights approved

Owner name: ABB OFFSHORE SYSTEMS LIMITED (GB)

Free format text: TRANSFERIDO DE : ABB RESEARCH LTD.

B25D Requested change of name of applicant approved

Owner name: VETCO GRAY CONTROLS LIMITED (GB)

Free format text: ALTERADO DE: ABB OFSHORE SYSTEMS LIMITED

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O ART. 8O COMBINADO COM O ART. 13 DA LPI

B12B Appeal against refusal [chapter 12.2 patent gazette]