CA2557951A1 - Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems - Google Patents
Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems Download PDFInfo
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- CA2557951A1 CA2557951A1 CA002557951A CA2557951A CA2557951A1 CA 2557951 A1 CA2557951 A1 CA 2557951A1 CA 002557951 A CA002557951 A CA 002557951A CA 2557951 A CA2557951 A CA 2557951A CA 2557951 A1 CA2557951 A1 CA 2557951A1
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- sensor portion
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- sensor
- methods
- water content
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Abstract
An apparatus for sensing three properties of materials: the conductivity or resistance, the dielectric constant, and the proximity of the material to the sensor portion of the apparatus. The apparatus includes a fixed impedance element coupled in series with the sensor portion of the apparatus between an input signal and ground. The sensor portion of the apparatus is an electrode configuration which includes at least two electrodes with a portion of the material residing between and in close proximity to the electrodes. The sensor exhibits a variable impedance resulting from changes in physical characteristics of the material. The fixed impedance element and the variable impedance of the sensor portion form a voltage divider network such that changes in impedance of the sensor portion results in changes in voltage on the output of the apparatus. The variable impedance of the sensor portion relates to changes in property of the material being sensed which can then be related to changes in other physical characteristics of the material such as weight, chemical composition, and temperature.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/766,864 | 1996-12-13 | ||
US08/766,864 US5891306A (en) | 1996-12-13 | 1996-12-13 | Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems |
CA002277837A CA2277837C (en) | 1996-12-13 | 1997-12-12 | Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002277837A Division CA2277837C (en) | 1996-12-13 | 1997-12-12 | Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2557951A1 true CA2557951A1 (en) | 1998-06-18 |
CA2557951C CA2557951C (en) | 2007-11-27 |
Family
ID=37114260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002557951A Expired - Fee Related CA2557951C (en) | 1996-12-13 | 1997-12-12 | Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2557951C (en) |
-
1997
- 1997-12-12 CA CA002557951A patent/CA2557951C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2557951C (en) | 2007-11-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20171212 |