The theoretical output of a ring core fluxgate sensor
This article proves that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic intensity perturbation within the core caused by an external, uniform magnetic field. (Dynamic permeability is defined to be the slope...
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| Published in: | IEEE transactions on magnetics Vol. 8; no. 4; pp. 791 - 796 |
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| Format: | Journal Article |
| Language: | English |
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IEEE
01-12-1972
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| Abstract | This article proves that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic intensity perturbation within the core caused by an external, uniform magnetic field. (Dynamic permeability is defined to be the slope of the hysteresis loop at a given point in time.) Assuming that ellipsoidal shells can approximate the core, the demagnetization factor can be "estimated" in the first order to be proportional to the first power of the quantity tape thickness (or number of wraps) divided by the core diameter. The constant of proportionality is determined from laboratory data. When an additional scale adjustment is applied to the resulting sensor output formula, the computed output tracks laboratory data for a range of sensor geometries. |
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| AbstractList | This article proves that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic intensity perturbation within the core caused by an external, uniform magnetic field. (Dynamic permeability is defined to be the slope of the hysteresis loop at a given point in time.) Assuming that ellipsoidal shells can approximate the core, the demagnetization factor can be "estimated" in the first order to be proportional to the first power of the quantity tape thickness (or number of wraps) divided by the core diameter. The constant of proportionality is determined from laboratory data. When an additional scale adjustment is applied to the resulting sensor output formula, the computed output tracks laboratory data for a range of sensor geometries. Demonstration that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic intensity perturbation within the core caused by an external, uniform magnetic field. (Dynamic permeability is defined to be the slope of the hysteresis loop at a given point in time). Assuming that ellipsoidal shells can approximate the core, the demagnetization factor can be 'estimated' in the first order to be proportional to the first power of the quantity tape thickness (or number of wraps) divided by the core diameter. The constant of proportionality is determined from laboratory data. When an additional scale adjustment is applied to the resulting sensor output formula, the computed output tracks laboratory data for a range of sensor geometries. |
| Author | Burger, J. |
| Author_xml | – sequence: 1 givenname: J. surname: Burger fullname: Burger, J. organization: Time-Zero Corporation, Torrance, CA, USA |
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| Cites_doi | 10.1109/TMAG.1965.1062987 10.1109/TMAG.1972.1067284 10.1109/TMAG.1967.1066078 |
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| References | ref2 ref3 webster (ref5) 1942 maxwell (ref4) 1904; 2 ref6 williams (ref1) 1950; 97 |
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| Snippet | This article proves that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and... Demonstration that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic... |
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| StartPage | 791 |
| SubjectTerms | Demagnetization Equations Laboratories Magnetic analysis Magnetic cores Magnetic sensors Magnetometers Permeability Voltage Wire |
| Title | The theoretical output of a ring core fluxgate sensor |
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