GB1307985A - Inductive transducers - Google Patents
Inductive transducersInfo
- Publication number
- GB1307985A GB1307985A GB1988969A GB1307985DA GB1307985A GB 1307985 A GB1307985 A GB 1307985A GB 1988969 A GB1988969 A GB 1988969A GB 1307985D A GB1307985D A GB 1307985DA GB 1307985 A GB1307985 A GB 1307985A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- ceramic
- casing
- transducer
- compensation
- 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
Links
- 230000001939 inductive effect Effects 0.000 title abstract 3
- 239000000919 ceramic Substances 0.000 abstract 4
- 229910000831 Steel Inorganic materials 0.000 abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 239000010959 steel Substances 0.000 abstract 3
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract 1
- 229910052581 Si3N4 Inorganic materials 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000008602 contraction Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 238000005192 partition Methods 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 238000004382 potting Methods 0.000 abstract 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 210000002268 wool Anatomy 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1307985 Electrophysical measurements SYBROOK ELECTRONICS Ltd 14 April 1970 [18 April 1969] 19889/69 Heading G1N [Also in Division H1] An inductive transducer has a hollow coil 2 Fig. 1c, and a number of flat core U-shaped members 4 spaced around the core each with one leg inside the core and separated by (sector shaped or rod-like) spaces. The winding wire may have ceramic or gloss insulation and the core flecs may be of nickel iron alloy. Two such transducers may be cemented inside a non- magnetic container 8 of austenitic steel, one, 7 being usable for securing changes in inductive coupling (e. g. for measuring displacement of a turbine shaft) whilst the other, 8, provides a degree of compensation for temperature changes. The coil formula may be of alumina (sintered) or silicon nitride. The forward end of the casing may be closed by a heat shield 10 of austenitic steel. The working transducer 7 may be separated from 8 by a partition 12 integral with the casing, a reference plate 13 of the same material as the target to be monitored a ceramic disc 14 which provides a non-magnetic gap of about the mean displacement to be measured and a metal disc 15 similar to the heat shield 10 to make compensation of change of permeability of 10 with temperature changes. Terminal members 17 carried by a ceramic ring 16 may be formed by legs of spiral springs under compression 17, Fig. 3 (not shown) to allow for expansion and contraction. Vibratory filling of the spaces in casing 8 with alumina powder may be effected or potting material may be used. The end closure 11 may have a cylindrical member 28, Fig. 3 (not shown) surrounding the mineral insulated cable 18 and welded to 11 and to the cable. This may be surrounded by a further cylindrical member (31) welded to 11 by election beam welding under high vacuum 1. The space within the end cap may be filled with ceramic wool instead of alumina powder. To take up end thrust a non-magnetic steel support rod (22) and a further rod having a three armed section 21, Fig. 4 (not shown) may be provided between 10 and 12. The transducers may be connected in two arms of a bridge circuit some temperature compensation being effected. The transducer 8 may be omitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1988969 | 1969-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1307985A true GB1307985A (en) | 1973-02-21 |
Family
ID=10136862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1988969A Expired GB1307985A (en) | 1969-04-18 | 1969-04-18 | Inductive transducers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3634799A (en) |
| DE (1) | DE2018548B2 (en) |
| GB (1) | GB1307985A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4486731A (en) * | 1982-06-10 | 1984-12-04 | Sensormatic Electronics Corporation | Coil assembly with flux directing means |
| US4563643A (en) * | 1982-07-30 | 1986-01-07 | Westinghouse Electric Corp. | Eddy current proximity sensor for use in a hostile turbine environment |
| DE69325165T2 (en) * | 1992-03-02 | 1999-10-28 | Seiko Epson Corp | DISPLACEMENT SENSOR |
| US5801530A (en) * | 1995-04-17 | 1998-09-01 | Namco Controls Corporation | Proximity sensor having a non-ferrous metal shield for enhanced sensing range |
| US5952822A (en) * | 1996-10-24 | 1999-09-14 | Allen-Bradley Company, Llc | Method and apparatus for proximity sensing in the presence of an external field |
| US6246229B1 (en) | 1999-05-12 | 2001-06-12 | Bently Nevada Corporation | Method and apparatus for controlling the temperature stability of an inductor using a magnetically coupled metallic object |
| DE20019542U1 (en) * | 2000-11-17 | 2002-03-21 | Werner Turck GmbH & Co. KG, 58553 Halver | Protective proximity switch encapsulated in a plastic housing |
| US6803757B2 (en) | 2001-10-02 | 2004-10-12 | Bentley Nevada, Llc | Multi-coil eddy current proximity probe system |
| JP3799270B2 (en) * | 2001-12-21 | 2006-07-19 | 株式会社日立製作所 | Control device for switching the driving state of an automobile |
| USD554590S1 (en) | 2005-10-31 | 2007-11-06 | Pentair Water Pool And Spa, Inc. | Junction box |
| US7239133B1 (en) | 2006-01-19 | 2007-07-03 | General Electric Company | Methods and systems for controlling the temperature stability of an inductor |
| US7825655B1 (en) | 2008-05-22 | 2010-11-02 | Balluff, Inc. | Inductive proximity sensors and housings for inductive proximity sensors |
| US20100179625A1 (en) * | 2009-01-13 | 2010-07-15 | National Yang-Ming University | Implantable Heating Apparatus for a Living Being and Method for Charging the Same |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1623345A (en) * | 1927-04-05 | Electrical apparatus and core therefor | ||
| US342553A (en) * | 1886-05-25 | Induction-coil | ||
| US2899653A (en) * | 1959-08-11 | capron | ||
| US737703A (en) * | 1902-02-08 | 1903-09-01 | American Telephone & Telegraph | Self-induction coil. |
| US1740458A (en) * | 1926-05-06 | 1929-12-24 | Westinghouse Electric & Mfg Co | R. r. reactor |
| US2595380A (en) * | 1948-01-19 | 1952-05-06 | Geotechnical Corp | Pipe thickness testing apparatus |
| GB875567A (en) * | 1958-08-26 | 1961-08-23 | Mec Test Ltd | Improvements in electromagnetic probes |
| US3118121A (en) * | 1959-05-07 | 1964-01-14 | Edeliff Instr | Variable reluctance transducer |
| US3194957A (en) * | 1961-01-04 | 1965-07-13 | Caldwell James | Electric lighting apparatus |
| US3369071A (en) * | 1965-10-15 | 1968-02-13 | Lauri S. Tuisku | Electrical conduit connector |
| US3454291A (en) * | 1967-02-15 | 1969-07-08 | Electrical Fittings Corp | Raintight electrical connector |
-
1969
- 1969-04-18 GB GB1988969A patent/GB1307985A/en not_active Expired
-
1970
- 1970-04-17 DE DE19702018548 patent/DE2018548B2/en active Pending
- 1970-04-17 US US29569A patent/US3634799A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2018548A1 (en) | 1970-12-03 |
| DE2018548B2 (en) | 1972-02-10 |
| US3634799A (en) | 1972-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |