CN1587893A - Anti-high voltage electric vortex shift sensor - Google Patents
Anti-high voltage electric vortex shift sensor Download PDFInfo
- Publication number
- CN1587893A CN1587893A CN 200410053924 CN200410053924A CN1587893A CN 1587893 A CN1587893 A CN 1587893A CN 200410053924 CN200410053924 CN 200410053924 CN 200410053924 A CN200410053924 A CN 200410053924A CN 1587893 A CN1587893 A CN 1587893A
- Authority
- CN
- China
- Prior art keywords
- eddy current
- displacement sensor
- high voltage
- shell
- high pressure
- 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
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 239000000696 magnetic material Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000001939 inductive effect Effects 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000006698 induction Effects 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a withstand high voltage eddy current displacement sensor comprising shell, skeleton winded with induction coil and short circuit ring with inner casing between them, inner shell is made of withstand high voltage nonpermeametion material and outer shell of soft magnetic material, induction coil winded by high strength wire is used to measure dynamic or static displacement. It has wide measuring range, good linearity, high mechanical strength and thermal stability, wide frequency response, extending limitation of traditional eddy current displacement sensor, so can be widely used in displacement measurement of valve core or hydraulic cylinder piston under high voltage.
Description
Technical field
The present invention relates to the non-electrical quantity measurement technology field, relate in particular to a kind of high pressure resistant eddy current displacement sensor.
Background technology
Traditional eddy current displacement sensor adopts inductive coil as probe, feeds high-frequency ac current in the coil and produces alternating magnetic field, and Measuring Object produces ring-type induction current, i.e. current vortex under the high frequency magnetic field effect; Current vortex can be resisted the action of a magnetic field, and the power of eddy effect changes along with the variation of the relative position between Measuring Object and high frequency probe; Thereby cause the variation of inductive coil parameter, and obtain corresponding displacement signal by subsequent process circuit.It has highly sensitive, non-cpntact measurement, frequency response advantages of higher; But its deficiency is that the range of linearity is little, and range is restricted; When measuring wide range, need to increase probe size, bring very big inconvenience to application; And the initial alignment of sensor is comparatively loaded down with trivial details.
Summary of the invention
Reduce probe size simultaneously in order to increase its measurement range, enlarge its efficient working range, reduce external environmental interference, the object of the present invention is to provide a kind of high pressure resistant eddy current displacement sensor.
The technical solution adopted for the present invention to solve the technical problems is:
Comprise shell, be wound with the skeleton of inductive coil, the short-circuited conducting sleeve that is contained in the skeleton constitutes.Between short-circuited conducting sleeve and skeleton inner housing is housed, inner housing is that high pressure resistant non-magnet material is made, and shell is that soft magnetic material is made.
The shell piecemeal of soft magnetic material is spliced.Inductive coil is for putting down around the formula inductive coil.Short-circuited conducting sleeve is that conductive material is made.Short-circuited conducting sleeve is solid bar or hollow bar.
The present invention compares with background technology, and the useful effect that has is:
1. adopt the solenoid type structure, enlarged the range of linearity of eddy current displacement sensor, increased the measurement range;
2. coil adopts and puts down around formula, and resistance is little, and temperature drift is little;
3. structural manufacturing process is simple, and antijamming capability is strong, and cost is low;
4. calibration process is simple, is easy to use.
Therefore the present invention can be widely used in the displacement measurement of spool or hydraulic cylinder piston etc. in the hyperbaric environment.
Description of drawings
Accompanying drawing is a structural principle synoptic diagram of the present invention.
In the accompanying drawing: 1. shell, 2. inductive coil, 3. skeleton, 4. short-circuited conducting sleeve, 5. inner housing, 6. O-ring seal, 7. valve body, 8. spool.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in drawings, the present invention includes shell 1, the skeleton 3 that is wound with inductive coil 2, the short-circuited conducting sleeve 4 that is contained in the skeleton 3 constitutes.Between short-circuited conducting sleeve 4 and skeleton 3, inner housing 5 is housed; Inner housing 5 adopts high pressure resistant non-magnet material such as non-magnetic stainless steel to make; Shell 1 adopts soft magnetic material such as electrical pure iron to make; Inductive coil 2 adopt high-strength paint coated copper wires flat around; Short-circuited conducting sleeve 4 is made of such as copper by conductive material; Shell 1 can the piecemeal splicing.Short-circuited conducting sleeve 4 can adopt modes such as screw thread to be connected with spool 8.
Pressure fluid Ps enters the P chamber through valve port, and the P cavity pressure can reach 32MPa; Inner housing 5 is made by high pressure resistant non-magnet material, and fitted seal circle 6, inner housing 5 can effective isolation hyperbaric environment P chambeies, devices such as protection coil.Inductive coil 2 is flat on coil rack 3, and coil rack 3 selects for use the comparatively stable material of temperature coefficient to make, and reduces thermal deformation.Inductive coil 2 feeds high-frequency ac current, produce alternating magnetic field, the vortex induction phenomenon takes place in short-circuited conducting sleeve 4 under action of alternating magnetic field, the resistance alternating magnetic field changes, thereby cause the impedance variation of inductive coil 2, owing to short-circuited conducting sleeve 4 positions along with spool changes, so the variation of the resistance value of inductive coil 2 directly and spool displacement be varied to direct ratio.Inductive coil 2 inserts in the full-bridge circuits as a brachium pontis, and full-bridge circuit is by exchanging the fixed ampllitude voltage drive, centre tap output voltage signal Uo, so the impedance variation of inductive coil 2 can be converted into by the full bridge measurement circuit be voltage signal output.
Claims (5)
1. high pressure resistant eddy current displacement sensor, comprise shell (1), be wound with the skeleton (3) of inductive coil, the short-circuited conducting sleeve (4) that is contained in the skeleton (3) constitutes, it is characterized in that: between short-circuited conducting sleeve (4) and skeleton (3), inner housing (5) is housed, inner housing (5) is high pressure resistant non-magnet material, and shell (1) is a soft magnetic material.
2. a kind of high pressure resistant eddy current displacement sensor according to claim 1 is characterized in that: the shell of soft magnetic material (1) piecemeal is spliced.
3. a kind of high pressure resistant eddy current displacement sensor according to claim 1 is characterized in that: inductive coil is for putting down around formula inductive coil (2).
4. a kind of high pressure resistant eddy current displacement sensor according to claim 1 is characterized in that: short-circuited conducting sleeve (4) is a conductive material.
5. a kind of high pressure resistant eddy current displacement sensor according to claim 1 is characterized in that: short-circuited conducting sleeve (4) is solid bar or hollow bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053924 CN1260542C (en) | 2004-08-18 | 2004-08-18 | Anti-high voltage electric vortex shift sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053924 CN1260542C (en) | 2004-08-18 | 2004-08-18 | Anti-high voltage electric vortex shift sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587893A true CN1587893A (en) | 2005-03-02 |
| CN1260542C CN1260542C (en) | 2006-06-21 |
Family
ID=34603005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053924 Expired - Fee Related CN1260542C (en) | 2004-08-18 | 2004-08-18 | Anti-high voltage electric vortex shift sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1260542C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707245A (en) * | 2011-03-28 | 2012-10-03 | 通用汽车环球科技运作有限责任公司 | Magnetic sensor system |
| CN103025995A (en) * | 2010-07-01 | 2013-04-03 | 国民油井华高公司 | Blowout preventer monitoring system and method of using same |
| CN103512697A (en) * | 2013-10-09 | 2014-01-15 | 中国电子科技集团公司第四十八研究所 | Radiation-resistant high-temperature-resistant pressure sensor |
| CN105841732A (en) * | 2014-02-13 | 2016-08-10 | 浙江大学 | Current vortex sensor static state automatic calibration system |
| CN106500580A (en) * | 2016-09-26 | 2017-03-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor and its probe and coil |
| CN106643450A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Micro-stroke, double-redundancy torsion-preventive LVDT displacement sensor |
| CN113309761A (en) * | 2021-06-22 | 2021-08-27 | 重庆工业职业技术学院 | Magnetism-gas position detection device |
-
2004
- 2004-08-18 CN CN 200410053924 patent/CN1260542C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103025995A (en) * | 2010-07-01 | 2013-04-03 | 国民油井华高公司 | Blowout preventer monitoring system and method of using same |
| US8978698B2 (en) | 2010-07-01 | 2015-03-17 | National Oilwell Varco, L.P. | Blowout preventer monitoring system and method of using same |
| US9708877B2 (en) | 2010-07-01 | 2017-07-18 | National Oilwell Varco, L.P. | Blowout preventer monitoring system and method of using same |
| CN102707245A (en) * | 2011-03-28 | 2012-10-03 | 通用汽车环球科技运作有限责任公司 | Magnetic sensor system |
| CN103512697A (en) * | 2013-10-09 | 2014-01-15 | 中国电子科技集团公司第四十八研究所 | Radiation-resistant high-temperature-resistant pressure sensor |
| CN103512697B (en) * | 2013-10-09 | 2016-03-09 | 中国电子科技集团公司第四十八研究所 | A kind of Radiation-resistant high-temperature-respressure pressure sensor |
| CN105841732A (en) * | 2014-02-13 | 2016-08-10 | 浙江大学 | Current vortex sensor static state automatic calibration system |
| CN105841732B (en) * | 2014-02-13 | 2018-05-22 | 浙江大学 | A kind of current vortex sensor static state automated calibration system |
| CN106643450A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Micro-stroke, double-redundancy torsion-preventive LVDT displacement sensor |
| CN106500580A (en) * | 2016-09-26 | 2017-03-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor and its probe and coil |
| CN113309761A (en) * | 2021-06-22 | 2021-08-27 | 重庆工业职业技术学院 | Magnetism-gas position detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1260542C (en) | 2006-06-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 Termination date: 20120818 |