CA2136735A1 - Magnetic measuring method and apparatus for determining the size and shape of a slot - Google Patents
Magnetic measuring method and apparatus for determining the size and shape of a slotInfo
- Publication number
- CA2136735A1 CA2136735A1 CA002136735A CA2136735A CA2136735A1 CA 2136735 A1 CA2136735 A1 CA 2136735A1 CA 002136735 A CA002136735 A CA 002136735A CA 2136735 A CA2136735 A CA 2136735A CA 2136735 A1 CA2136735 A1 CA 2136735A1
- Authority
- CA
- Canada
- Prior art keywords
- slot
- size
- shape
- magnetic field
- determining
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 3
- 239000004020 conductor Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
Landscapes
- Measuring Magnetic Variables (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)
Abstract
The invention concerns a method and an apparatus for determining the size and shape of a slot, for measuring, e.g., the profile of the discharge opening (slice) of a paper machine. In the method, by means of at least two magnetometers (6) attached to an edge (2 and/or 5) of the slot, the magnetic field depending on the size and shape of the slot is measured. According to the invention, an alternating electrical current is applied to a current conductor (I) attached to the edge (2 and/or 5) of the slot to create an alternating magnetic field, measurement of the alternating magnetic field is phase-locked with the applied electrical current, and the size (d) and shape of the slot are calculated from the measured values of the magnetic field.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI922660A FI92437C (en) | 1992-06-09 | 1992-06-09 | Magnetic measurement method for determining gap size and profile |
FI922660 | 1992-06-09 | ||
PCT/FI1993/000251 WO1993025864A1 (en) | 1992-06-09 | 1993-06-09 | Magnetic measuring method and apparatus for determining the size and shape of a slot |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2136735A1 true CA2136735A1 (en) | 1993-12-23 |
CA2136735C CA2136735C (en) | 2006-04-11 |
Family
ID=36178063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002136735A Expired - Fee Related CA2136735C (en) | 1992-06-09 | 1993-06-09 | Magnetic measuring method and apparatus for determining the size and shape of a slot |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2136735C (en) |
-
1993
- 1993-06-09 CA CA002136735A patent/CA2136735C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2136735C (en) | 2006-04-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |