CN201218720Y - Combination winding differential linear displacement sensor - Google Patents
Combination winding differential linear displacement sensor Download PDFInfo
- Publication number
- CN201218720Y CN201218720Y CNU2008200902496U CN200820090249U CN201218720Y CN 201218720 Y CN201218720 Y CN 201218720Y CN U2008200902496 U CNU2008200902496 U CN U2008200902496U CN 200820090249 U CN200820090249 U CN 200820090249U CN 201218720 Y CN201218720 Y CN 201218720Y
- Authority
- CN
- China
- Prior art keywords
- winding
- coil
- linear displacement
- differential linear
- displacement transducer
- 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 - Fee Related
Links
Images
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A combination winding differential linear displacement transducer is disclosed. In the prior transducer, sensitivity is not a fixed value in the whole displacement measuring range, but is variable. The combination winding differential linear displacement transducer comprises a case composed of an inner tube (1), a terminal plate (2) and an outer tube (3), wherein a set of coil frames (4) with the same width is fixed on the inner tube, a coil (11) with fixed winding around turns is wound on each coil frame, wherein the coil includes a winding A (5) and a winding B (6), a magnetic conductive core bar (8) connected with a non-magnetic conductive connecting-rod is arranged in the inner tube. The product is applied for mechanical movement measurement of the industrial field.
Description
Technical field:
The utility model relates to a kind of differential Linear displacement transducer of combination winding that uses the relative displacement of electromagnetic principle Measuring Object.
Background technology:
At present, known differential Linear displacement transducer (hereinafter to be referred as LVDT) is a kind of sensor that mechanical motion can be converted to electric signal., long service life firm in structure, can work in various abominable extreme environments, widely use at industrial circle because of it.The LVDT of prior art forms (winding 1 and winding 2) by two windings that are wrapped on the coil rack.Sensor has 3 extension lines, is respectively a signal feedback end and two excitation ends.2 ends of winding 1 and 1 end of winding 2 are linked together, draw as the signal feedback end with the center tap form, 1 end of winding 1 and 2 ends of winding 2 are drawn two lines respectively as the excitation end.Its measuring principle is that a stable excitation signal is inserted at the two ends (excitation end) at telefault, when the magnetic conduction core bar in the coil moves in coil, the feedback signal of the feedback end of coil will change with the change in location of magnetic conduction core bar, feedback signal promptly be can be used for representing the mechanical shift (please refer to accompanying drawing 4, accompanying drawing 5) of magnetic conduction core bar through suitable processing.
Because what use is the single group coil structure, though feedback signal can be reacted the moving displacement of magnetic conduction core bar one to one, but in bigger range of displacement measurement, be difficult to guarantee the variation of feedback signal and the linear relationship of magnetic conduction core bar displacement on the coil winding process.Increase a lot of problems for like this post-processed of feedback signal.The problem outstanding behaviours is not fixed value in whole range of displacement measurement in the sensitivity of sensor, but change.
Summary of the invention:
The purpose of this utility model provides a kind of differential Linear displacement transducer of combination winding that adopts multistage coil combination, can overcome sensitivity unfixed problem of value in whole range of displacement measurement of sensor in the prior art, and improve compatibility.
Above-mentioned purpose realizes by following technical scheme:
The differential Linear displacement transducer of combination winding, its composition comprises: the housing that is connected and composed by interior pipe, end plate and outer tube, fix the coil rack that one group of width equates in described on the pipe, the fixing coil of winding around number of turn summation on described every nodel line ring framework, described coil comprises winding A and winding B, has the magnetic conduction core bar that is connected with non-magnetic conduction connecting rod in the described interior pipe.
The differential Linear displacement transducer of described combination winding has the extension line chamber between described interior pipe and the outer tube from then on described winding coil lead is drawn.
The beneficial effects of the utility model:
The utility model adopts the combination winding technology of multistage coil, can be implemented in the sensitivity unanimity in the whole range ability easily, thereby improves the compatibility of product.Simultaneously, because the structure of single coil shortens, when producing in batches, can greatly reduce because the discreteness of the sensor parameters that every circle coil causes when spatial position change.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.The black part of coil 11 is divided into winding A among the figure, and white portion is winding B.Arrow is represented magnetic conduction core bar direction of motion among the figure.
Accompanying drawing 2 is cross-sectional view of this product coil structure.The black part of coil 11 is divided into winding A among the figure, and white portion is winding B.Arrow is represented magnetic conduction core bar direction of motion among the figure.
Accompanying drawing 3 is this product electrical schematic diagrams.12 is that coil 1,13 is that coil 2,14 is coil N among the figure, and 1 among the figure, 2 is the two ends extension line of winding.
Accompanying drawing 4 is structural representations of existing like product.
Accompanying drawing 5 is electrical schematic diagrams of existing like product.
Embodiment:
Embodiment 1:
The differential Linear displacement transducer of combination winding, its composition comprises: the housing that is connected and composed by interior pipe 1, end plate 2 and outer tube 3, fix the coil rack 4 that one group of width equates in described on the pipe, the fixing coil 11 of winding around number of turn summation on described every nodel line ring framework, described coil comprises winding A5 and winding B6, has the magnetic conduction core bar 8 that is connected with non-magnetic conduction connecting rod 7 in the described interior pipe.
Embodiment 2:
The differential Linear displacement transducer of combination winding, its composition comprises: the housing that is connected and composed by interior pipe 1, end plate 2 and outer tube 3, fix the coil rack 4 that one group of width equates in described on the pipe, the fixing coil 11 of winding around number of turn summation on described every nodel line ring framework, described coil comprises winding A5 and winding B6, has the magnetic conduction core bar 8 that is connected with non-magnetic conduction connecting rod 7 in the described interior pipe.
The differential Linear displacement transducer of described combination winding has extension line chamber 9 between described interior pipe and the outer tube from then on described winding coil lead 10 is drawn.
The differential Linear displacement transducer of described combination winding, every group of coil is only to the specific portion motion sensitive of magnetic conduction core bar in whole measurement range, every group of coil is made up of two windings, when adjusting two windings (winding A and winding B) number of turn ratio of certain group coil, only changes local sensitivity.Can be implemented in sensitivity unanimity in the whole measurement range easily by adjustment to each coil.
The summation of described winding A and winding B is a fixed value, just diverse location turn ratio difference (requiring to preestablish according to local sensitivity).According to connecting shown in 3, and use special-purpose LVDT transmitter that this product is tested each coil of twining.According to test result, the number of turn ratio of the local coil that departs from predefined sensitivity allowed band is adjusted, until sensor sensitivity unanimity in whole range ability.
Embodiment 3:
In conjunction with the accompanying drawings 1, be that the differential Linear displacement transducer example of combination winding of 100mm is illustrated with the range.Selection wire ring framework single-unit length 10mm, single-stage coil turn (winding A+ winding B) 2000 circles, coil rack joint number 15 (N=15, selection principle is that loop length is about 1.5 times of transducer range).The number of turn that preestablishes coil winding A and winding B is as shown in table 1.
According to connection shown in Figure 3, and use special-purpose LVDT transmitter to test each coil of twining.The sensitivity (sensation unit mV/mm) that selection magnetic conduction core bar is in the hub of a spool position preestablishes a sensitivity variations allowed band (according to the requirement of linear sensor degree, generally selecting about 1%) as benchmark.According to test result, the number of turn ratio of the local coil that departs from predefined sensitivity allowed band is adjusted, adjust principle and be, how many umber of turns of coil increases, the corresponding minimizing of another umber of turn what.Until sensor in whole range ability sensitivity error all in the sensitivity error allowed band.Record coil turn data are as the data basis that produces product.
Table 1
| Progression | Winding A | Winding B |
| 1 | 0 | 2000 |
| 2 | 143 | 1857 |
| 3 | 286 | 1714 |
| 4 | 429 | 1571 |
| 5 | 571 | 1429 |
| 6 | 714 | 1286 |
| 7 | 857 | 1143 |
| 8 | 1000 | 1000 |
| 9 | 1143 | 857 |
| 10 | 1286 | 714 |
| 11 | 1429 | 571 |
| 12 | 1571 | 429 |
| 13 | 1714 | 286 |
| 14 | 1857 | 143 |
| 15 | 2000 | 0 |
The utility model is used for the mechanical motion of industrial circle to be measured, and mechanical motion can be converted to electric signal.
Claims (2)
1. one kind is made up the differential Linear displacement transducer of winding, its composition comprises: the housing that is connected and composed by interior pipe, end plate and outer tube, it is characterized in that: fix the coil rack that one group of width equates in described on the pipe, the fixing coil of winding around number of turn summation on described every nodel line ring framework, described coil comprises winding A and winding B, has the magnetic conduction core bar that is connected with non-magnetic conduction connecting rod in the described interior pipe.
2. the differential Linear displacement transducer of combination winding according to claim 1 is characterized in that: have the extension line chamber between pipe and the outer tube in described from then on described winding coil lead is drawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200902496U CN201218720Y (en) | 2008-06-19 | 2008-06-19 | Combination winding differential linear displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200902496U CN201218720Y (en) | 2008-06-19 | 2008-06-19 | Combination winding differential linear displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218720Y true CN201218720Y (en) | 2009-04-08 |
Family
ID=40541555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200902496U Expired - Fee Related CN201218720Y (en) | 2008-06-19 | 2008-06-19 | Combination winding differential linear displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218720Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776433A (en) * | 2010-03-23 | 2010-07-14 | 哈尔滨工业大学 | Separate differential displacement sensor suitable for micro displacement detection |
| CN102175128A (en) * | 2011-01-24 | 2011-09-07 | 西安旭彤电子科技有限公司 | Differential transformer type line displacement sensor and manufacture and use methods thereof |
| CN103363884A (en) * | 2012-03-28 | 2013-10-23 | 贵州红林机械有限公司 | Differential type five-wire system linear displacement sensor |
| CN104697427A (en) * | 2014-12-12 | 2015-06-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Differential transformer type inductance displacement sensor composed of multiple coils |
| CN105719829A (en) * | 2016-04-25 | 2016-06-29 | 安徽感航电子科技有限公司 | Winding process of three-wire system linear variable differential transformer (LVDT) |
| CN107966094A (en) * | 2017-11-17 | 2018-04-27 | 山东大东联石油设备有限公司 | A kind of oil well pump displacement detection device for being placed in underground installation |
| CN110736429A (en) * | 2018-07-19 | 2020-01-31 | 科峰航智电气科技（天津）有限公司 | winding structure for improving linearity of LVDT |
-
2008
- 2008-06-19 CN CNU2008200902496U patent/CN201218720Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776433A (en) * | 2010-03-23 | 2010-07-14 | 哈尔滨工业大学 | Separate differential displacement sensor suitable for micro displacement detection |
| CN102175128A (en) * | 2011-01-24 | 2011-09-07 | 西安旭彤电子科技有限公司 | Differential transformer type line displacement sensor and manufacture and use methods thereof |
| CN103363884A (en) * | 2012-03-28 | 2013-10-23 | 贵州红林机械有限公司 | Differential type five-wire system linear displacement sensor |
| CN104697427A (en) * | 2014-12-12 | 2015-06-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Differential transformer type inductance displacement sensor composed of multiple coils |
| CN104697427B (en) * | 2014-12-12 | 2017-06-09 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of differential transformer type inductance displacement sensor being made up of multiple coils |
| CN105719829A (en) * | 2016-04-25 | 2016-06-29 | 安徽感航电子科技有限公司 | Winding process of three-wire system linear variable differential transformer (LVDT) |
| CN107966094A (en) * | 2017-11-17 | 2018-04-27 | 山东大东联石油设备有限公司 | A kind of oil well pump displacement detection device for being placed in underground installation |
| CN110736429A (en) * | 2018-07-19 | 2020-01-31 | 科峰航智电气科技（天津）有限公司 | winding structure for improving linearity of LVDT |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201218720Y (en) | Combination winding differential linear displacement sensor | |
| CN107910171B (en) | Linear variable differential transformer | |
| CN202092621U (en) | Stay wire displacement sensor | |
| CN101876528A (en) | Electromagnetic sensor-based metal film thickness measuring device and method | |
| CN210774488U (en) | Signal compensation circuit of magnetoelastic sensor | |
| CN201837364U (en) | Pull-press strain-gauge-type sensor | |
| JP3930057B2 (en) | Displacement measurement system for solenoid coil | |
| CN108571986A (en) | Displacement sensor | |
| CN101493184A (en) | Clearance structure magnetic fluid flow control device | |
| CN102053193A (en) | Current sensor adopting differential coil structure | |
| US10288469B2 (en) | Magnetostrictive transducer | |
| CN104776791B (en) | A kind of method of displacement sensor and measurement displacement | |
| CN104006916B (en) | A kind of mutual inductance type magnetic-liquid micro differential pressure sensor | |
| CN104319082A (en) | Reactor | |
| CN105092143A (en) | Wide-range magnetic-liquid micro differential pressure sensor | |
| CN102278937A (en) | Differential transformation type displacement sensor | |
| CN203024724U (en) | Displacement detector | |
| CN206362415U (en) | Signal transducer with vibrations blanking function | |
| CN105021117A (en) | Stay-wire type displacement sensor and measuring system based on the sensor | |
| CN205580646U (en) | Thread tension measuring device | |
| CN113625038A (en) | Current measuring device and voltage and current measuring device | |
| CN113436856B (en) | Hollow coil sensing complementary device, pincerlike multimeter and preparation method thereof | |
| CN104198109A (en) | Magnetic-liquid micropressure differential sensor with branch tube | |
| CN101105388A (en) | Magnetic induction angle meter | |
| CN202109877U (en) | Differential transformer displacement sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20150619 |
|
| EXPY | Termination of patent right or utility model |