Apparatus for detecting magnetic fluid
The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current magnetic field, and a plurality of magnetic field detection devices which are disposed in proximity to each other to measure the magnetic field...
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Main Authors | , , , , , |
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Format | Patent |
Language | English French German |
Published |
07.05.2003
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Abstract | The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current magnetic field, and a plurality of magnetic field detection devices which are disposed in proximity to each other to measure the magnetic field component that is perpendicular to the exciting magnetic field. A magnetic fluid that possesses paramagnetism is injected from the outside into a substance in which a fluid can flow, and the local magnetic field gradient is then measured while the injected magnetic fluid is excited by the application of a direct-current or alternating-current magnetic field from the outside, thus measuring the presence or absence of distortion of the local magnetic field distribution arising from the fact that the specific magnetic permeability of the magnetic fluid injected into the substance is higher than that of the surrounding substance, so that sites where large amount of the magnetic fluid has accumulated are identified in a non-invasive manner without being affected by external magnetic noise. |
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AbstractList | The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current magnetic field, and a plurality of magnetic field detection devices which are disposed in proximity to each other to measure the magnetic field component that is perpendicular to the exciting magnetic field. A magnetic fluid that possesses paramagnetism is injected from the outside into a substance in which a fluid can flow, and the local magnetic field gradient is then measured while the injected magnetic fluid is excited by the application of a direct-current or alternating-current magnetic field from the outside, thus measuring the presence or absence of distortion of the local magnetic field distribution arising from the fact that the specific magnetic permeability of the magnetic fluid injected into the substance is higher than that of the surrounding substance, so that sites where large amount of the magnetic fluid has accumulated are identified in a non-invasive manner without being affected by external magnetic noise. |
Author | KATAYOSE, YOSHIHISA MINAMIYA, YOSHIHIRO OGAWA, JUNICHI KAMADA, SHUICHI UEDA, TOMOAKI SAITO, REIJIRO |
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DocumentTitleAlternate | Vorrichtung zum Detektieren von magnetischer Flüssigkeit Dispositif pour détecter un fluide magnétique |
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RelatedCompanies | KATAYOSE, YOSHIHISA MINAMIYA, YOSHIHIRO OGAWA, JUNICHI OLYMPUS CORPORATION KAMADA, SHUICHI SAITO, REIJIRO |
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Snippet | The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current... |
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SubjectTerms | DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEDICAL OR VETERINARY SCIENCE PHYSICS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SURGERY TESTING |
Title | Apparatus for detecting magnetic fluid |
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