DE69816680D1 - Ferrofluidsensor - Google Patents
FerrofluidsensorInfo
- Publication number
- DE69816680D1 DE69816680D1 DE69816680T DE69816680T DE69816680D1 DE 69816680 D1 DE69816680 D1 DE 69816680D1 DE 69816680 T DE69816680 T DE 69816680T DE 69816680 T DE69816680 T DE 69816680T DE 69816680 D1 DE69816680 D1 DE 69816680D1
- Authority
- DE
- Germany
- Prior art keywords
- ferrofluid sensor
- ferrofluid
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/10—Measuring inclination, e.g. by clinometers, by levels by using rolling bodies, e.g. spheres, cylinders, mercury droplets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/105—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by magnetically sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/11—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by inductive pick-up
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
- G01C9/06—Electric or photoelectric indication or reading means
- G01C2009/064—Electric or photoelectric indication or reading means inductive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/10—Measuring inclination, e.g. by clinometers, by levels by using rolling bodies, e.g. spheres, cylinders, mercury droplets
- G01C2009/102—Measuring inclination, e.g. by clinometers, by levels by using rolling bodies, e.g. spheres, cylinders, mercury droplets cylinders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
- G01C2009/187—Measuring inclination, e.g. by clinometers, by levels by using liquids magnetic, e.g. ferromagnetic
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soft Magnetic Materials (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US799121 | 1997-02-11 | ||
US08/799,121 US5780741A (en) | 1997-02-11 | 1997-02-11 | Sensor employing a sliding magnet suspended on ferrofluid |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69816680D1 true DE69816680D1 (de) | 2003-09-04 |
DE69816680T2 DE69816680T2 (de) | 2004-06-03 |
Family
ID=25175086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69816680T Expired - Fee Related DE69816680T2 (de) | 1997-02-11 | 1998-01-26 | Ferrofluidsensor |
Country Status (4)
Country | Link |
---|---|
US (1) | US5780741A (de) |
EP (1) | EP0857945B1 (de) |
JP (1) | JPH10239096A (de) |
DE (1) | DE69816680T2 (de) |
Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19942363C2 (de) * | 1999-09-04 | 2002-01-31 | Bayerische Motoren Werke Ag | Induktiver Beschleunigungssensor |
US7191652B2 (en) * | 2000-02-24 | 2007-03-20 | Innalabs Technologies, Inc. | Magnetofluidic accelerometer with partial filling of cavity with magnetic fluid |
US7296469B2 (en) * | 2000-02-24 | 2007-11-20 | Innalabs Technologies, Inc. | Magnetofluidic accelerometer with active suspension |
US6374673B1 (en) | 2000-03-01 | 2002-04-23 | Texas Components Corporation | Velocity sensor |
WO2001073449A1 (fr) * | 2000-03-27 | 2001-10-04 | Shozo Hirayama | Accelerometre triaxial utilisant un fluide magnetique |
US7222433B2 (en) * | 2002-01-23 | 2007-05-29 | Autonnic Research, Inc. | Electromagnetic inclinometer |
US6768230B2 (en) | 2002-02-19 | 2004-07-27 | Rockwell Scientific Licensing, Llc | Multiple magnet transducer |
US7288860B2 (en) * | 2002-02-19 | 2007-10-30 | Teledyne Licensing, Inc. | Magnetic transducer with ferrofluid end bearings |
US6812598B2 (en) * | 2002-02-19 | 2004-11-02 | Rockwell Scientific Licensing, Llc | Multiple magnet transducer with differential magnetic strengths |
US6812583B2 (en) * | 2002-02-19 | 2004-11-02 | Rockwell Scientific Licensing, Llc | Electrical generator with ferrofluid bearings |
US6628017B1 (en) * | 2002-08-06 | 2003-09-30 | Jacob Chass | Ferrofluidic, electromagnetic power supply |
US7009310B2 (en) * | 2004-01-12 | 2006-03-07 | Rockwell Scientific Licensing, Llc | Autonomous power source |
US7143648B2 (en) * | 2004-09-29 | 2006-12-05 | Ferrolabs, Inc. | Magnetofluidic accelerometer with capacitive sensing of inertial body position |
KR101189717B1 (ko) * | 2005-08-17 | 2012-10-10 | 가부시키가이샤 지-데바이스 | 소형 경사 및 진동 센서와 그 제조 방법 |
DE102006007900B4 (de) * | 2006-02-18 | 2008-04-03 | Stefan Gräf | Ferrofluid-Neigungs- oder -Beschleunigungssensor |
DE102006061198B4 (de) * | 2006-05-31 | 2019-07-18 | Asm Automation Sensorik Messtechnik Gmbh | Neigungssensor |
JP2008209235A (ja) * | 2007-02-26 | 2008-09-11 | Nohmi Bosai Ltd | 加速度センサ |
JP2008209234A (ja) * | 2007-02-26 | 2008-09-11 | Nohmi Bosai Ltd | 加速度センサ |
US20090212645A1 (en) * | 2008-02-27 | 2009-08-27 | Infineon Technologies Ag | Electronic device for harvesting energy |
DE102009006368B3 (de) * | 2009-01-28 | 2010-07-01 | Asm Automation Sensorik Messtechnik Gmbh | Neigungssensor |
US8056246B1 (en) * | 2010-07-19 | 2011-11-15 | National Semiconductor Corporation | Ferrofluidic orientation sensor and method of forming the sensor |
DE102010061898B4 (de) * | 2010-11-24 | 2016-07-07 | Endress + Hauser Gmbh + Co. Kg | Druckmittler und Druckmessaufnehmer mit einem Druckmittler |
US9250070B2 (en) | 2011-11-16 | 2016-02-02 | Keith Robert Wootten | Rugged three-axis inclinometer |
AU2013408286B2 (en) | 2013-12-19 | 2016-11-17 | Halliburton Energy Services, Inc. | Self-assembling packer |
NO347228B1 (en) | 2013-12-19 | 2023-07-17 | Halliburton Energy Services Inc | Intervention Tool for Delivering Self-Assembling Repair Fluid |
EP3047099A1 (de) | 2013-12-30 | 2016-07-27 | Halliburton Energy Services, Inc. | Ferrofluidwerkzeug zur erweiterung magnetischer felder in einem bohrloch |
EP3027851A1 (de) | 2013-12-30 | 2016-06-08 | Halliburton Energy Services, Inc. | Ferrofluidwerkzeug zur bereitstellung modifizierbarer strukturen in bohrlöchern |
MX2016004698A (es) | 2013-12-30 | 2016-12-02 | Halliburton Energy Services Inc | Herramienta de ferrofluido para influenciar las vias conductoras de electricidad en un pozo. |
MX2016006952A (es) | 2013-12-30 | 2016-09-27 | Halliburton Energy Services Inc | Herramienta de ferrofluido para el aislamiento de objetos en un pozo. |
WO2015178878A1 (en) * | 2014-05-19 | 2015-11-26 | Halliburton Energy Services, Inc. | Optical magnetic field sensor units for a downhole environment |
US10876378B2 (en) | 2015-06-30 | 2020-12-29 | Halliburton Energy Services, Inc. | Outflow control device for creating a packer |
CN105527459A (zh) * | 2016-02-04 | 2016-04-27 | 河北工业大学 | 一种霍尔式磁性液体加速度传感器 |
CN106838089B (zh) * | 2016-12-14 | 2019-03-01 | 北京交通大学 | 一种未充满型磁性液体一阶浮力原理减振器 |
RU171502U1 (ru) * | 2017-03-21 | 2017-06-02 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | Магнитожидкостное устройство для определения угла наклона |
CN107064833A (zh) * | 2017-04-18 | 2017-08-18 | 蔡立汉 | 一种简易的旋磁测验器 |
US10620335B2 (en) | 2017-05-02 | 2020-04-14 | Ascension Technology Corporation | Rotating frequencies of transmitters |
US10779892B2 (en) | 2017-08-10 | 2020-09-22 | Northern Digital Inc. | Tracking a cylindrical opening |
US11529193B2 (en) | 2017-08-10 | 2022-12-20 | Northern Digital Inc. | Tracking a sensor that includes a ferrofluid |
CN107631719A (zh) * | 2017-08-24 | 2018-01-26 | 云南靖创液态金属热控技术研发有限公司 | 一种基于液态金属的倾角传感器 |
CN109738051B (zh) * | 2018-12-28 | 2021-08-06 | 重庆工商大学 | 一种磁流变液自适应超声传感器及检测方法 |
CN113295262A (zh) * | 2021-04-16 | 2021-08-24 | 北京交通大学 | 一种基于磁性液体的柔性可穿戴传感装置 |
CN114047250B (zh) * | 2021-11-25 | 2023-03-17 | 西安电子科技大学 | 金属管道裂纹检测传感器及检测方法 |
SE545560C2 (en) * | 2022-11-07 | 2023-10-24 | Husqvarna Ab | System for determining an orientation of an inertial-magnetic measurement unit using magnetic fluid |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8424053D0 (en) * | 1984-09-22 | 1984-10-31 | Russell M K | Direction-finding devices |
US4706498A (en) * | 1985-09-23 | 1987-11-17 | Ferrotec, Inc. | Apparatus and method for measuring movement |
JPH0697236B2 (ja) * | 1987-05-30 | 1994-11-30 | 株式会社日本自動車部品総合研究所 | 加速度センサ |
US5452520A (en) * | 1994-03-14 | 1995-09-26 | Ferrofluidics Corporation | Ferrofluid inclinometer |
-
1997
- 1997-02-11 US US08/799,121 patent/US5780741A/en not_active Expired - Fee Related
-
1998
- 1998-01-26 DE DE69816680T patent/DE69816680T2/de not_active Expired - Fee Related
- 1998-01-26 EP EP98101263A patent/EP0857945B1/de not_active Expired - Lifetime
- 1998-02-10 JP JP10046293A patent/JPH10239096A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE69816680T2 (de) | 2004-06-03 |
EP0857945A2 (de) | 1998-08-12 |
EP0857945B1 (de) | 2003-07-30 |
US5780741A (en) | 1998-07-14 |
JPH10239096A (ja) | 1998-09-11 |
EP0857945A3 (de) | 2000-03-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: FERROTEC (USA) CORP., NASHUA, N.H., US |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |