CN104266575A - Coil structure of LVDT - Google Patents
Coil structure of LVDT Download PDFInfo
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- CN104266575A CN104266575A CN201410524873.2A CN201410524873A CN104266575A CN 104266575 A CN104266575 A CN 104266575A CN 201410524873 A CN201410524873 A CN 201410524873A CN 104266575 A CN104266575 A CN 104266575A
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Abstract
The invention belongs to the displacement transformer designing technology and relates to the improvement on a coil structure of an LVDT. The coil structure of the LVDT comprises a coil bobbin, an exciting coil L1 and two output coils, wherein the exciting coil L1 and the two output coils are wound around the coil bobbin. The coil structure of the LVDT is characterized in that a first constant coil L4 and a second constant coil L5 are wound between the exciting coil L1 and one output coil and between the exciting coil L1 and the other output coil. According to the improved coil structure of the LVDT, electrical stroke in a single direction of the LVDT is achieved, and the requirement for measuring the electrical stroke in a single direction is met; meanwhile, the size and the weight are reduced, and cost is reduced.
Description
Technical field
The invention belongs to displacement transducer designing technique, relate to the improvement to LVDT loop construction.
Background technology
Traditional electric stroke of LVDT sensor requirements is Symmetrical form (as ± 23mm), and its electrical schematic diagram is see Fig. 1, and it is made up of coil rack and magnetizing coil L1 and two output winding be wound on coil rack.Two output windings are first output winding L2 and the second output winding L3, magnetizing coil L1 is wound on the innermost layer of adjacent coil skeleton, first output winding L2 and the second output winding L3 around the outside of magnetizing coil L1, the first output winding L2 and structural symmetry identical with the parameter of the second output winding L3.The top a of the first output winding L2 and end b is two output terminals of the first output winding L2, and the top c of the second output winding L3 and end d is two output terminals of the second output winding L3.Fig. 2 is the curve of output schematic diagram of traditional LVDT sensor.The zero displacement point of displacement-voltage curve of differential voltage Va-Vb overlaps with the initial point of coordinate system.The initial point of coordinate system is equivalent to the central point of coil rack.The horizontal ordinate of coordinate system is displacement, and ordinate is output voltage.The shortcoming of this structure is: can not meet electric stroke is the requirement that single direction is measured, such as require that measurement range is 0mm ~ 35.5mm, according to traditional LVDT sensor, then need the sensor an of-35.5mm ~ 0mm ~ 35.5mm,-35.5mm wherein ~ 0mm belongs to vacant range, not only increase volume and weight, and improve cost.
Summary of the invention
The object of the invention is: the loop construction proposing a kind of LVDT sensor of improvement, to realize the object that LVDT sensor exports the electric stroke of single direction, meeting electric stroke is the requirement that single direction is measured, and reduces volume and weight, reduces costs.
Technical scheme of the present invention is: a kind of LVDT pickup wire coil structures, comprise coil rack and be wound on magnetizing coil L1 and two output winding on coil rack, two output windings are first output winding L2 and the second output winding L3, magnetizing coil L1 is wound on the innermost layer of adjacent coil skeleton, the first output winding L2 and structural symmetry identical with the parameter of the second output winding L3, it is characterized in that: between magnetizing coil L1 and two output winding, be wound with the first constant coil L4 and the second constant coil L5, first constant coil L4 and structural symmetry identical with the parameter of the second constant coil L5, the wire diameter of constant coil is identical with magnetizing coil L1, number of turn n=0.1N ~ the 0.2N of constant coil, N is the number of turn of magnetizing coil L1, the top a of the first output winding L2 is the first output terminal of the first output winding group, the end b of the first output winding L2 is connected with the top e of the first constant coil L4, the end f of the first constant coil L4 is the second output terminal of the first output winding group, the top c of the second output winding L3 is the first output terminal of the second output winding group, and the end d of the second output winding L3 is connected with the end h of the second constant coil L5, and the top g of the second constant coil L5 is the second output terminal of the second output winding group.
Advantage of the present invention is: the loop construction proposing a kind of LVDT sensor of improvement, achieves the object that LVDT sensor exports the electric stroke of single direction, and meeting electric stroke is the requirement that single direction is measured.And reduce volume and weight, reduce cost.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of traditional LVDT pickup wire coil structures.
Fig. 2 is the curve of output schematic diagram of traditional LVDT sensor.
Fig. 3 is the electrical schematic diagram of LVDT pickup wire coil structures of the present invention.
Fig. 4 is the curve of output schematic diagram of LVDT sensor of the present invention.
Embodiment
Below the present invention is described in further details.See Fig. 3,4, a kind of LVDT pickup wire coil structures, comprise coil rack and be wound on magnetizing coil L1 and two output winding on coil rack, two output windings are first output winding L2 and the second output winding L3, magnetizing coil L1 is wound on the innermost layer of adjacent coil skeleton, the first output winding L2 and structural symmetry identical with the parameter of the second output winding L3, it is characterized in that: between magnetizing coil L1 and two output winding, be wound with the first constant coil L4 and the second constant coil L5, first constant coil L4 and structural symmetry identical with the parameter of the second constant coil L5, the wire diameter of constant coil is identical with magnetizing coil L1, number of turn n=0.1N ~ the 0.2N of constant coil, N is the number of turn of magnetizing coil L1, the top a of the first output winding L2 is the first output terminal of the first output winding group, the end b of the first output winding L2 is connected with the top e of the first constant coil L4, the end f of the first constant coil L4 is the second output terminal of the first output winding group, the top c of the second output winding L3 is the first output terminal of the second output winding group, and the end d of the second output winding L3 is connected with the end h of the second constant coil L5, and the top g of the second constant coil L5 is the second output terminal of the second output winding group.
Principle of work of the present invention is: the method utilizing the constant winding of series connection, the series connection of different name end makes to export Va voltage and raises, Same Name of Ends series connection makes to export Vb voltage and reduces, thus the zero-bit of differential voltage (Va-Vb) is offset left (see accompanying drawing 2,4).Arrange around reaching the object exporting the electric stroke of single direction by this kind of mode.
Embodiment 1: after certain type LVDT presses coiling of the present invention, magnetizing coil 7000 circle, two each 2300 circles of output winding, constant coil 1400 circle.If traditionally coiling, LVDT length can double, i.e. magnetizing coil 14000 circle, two each 4600 circles of output winding.
Embodiment 2: after certain type LVDT presses coiling of the present invention, magnetizing coil 7200 circle, two each 2600 circles of output winding, constant coil 720 circle.
Embodiment 3: after certain type LVDT presses coiling of the present invention, magnetizing coil 4000 circle, two each 1800 circles of output winding, constant coil 600 circle.
Claims (1)
1. a LVDT pickup wire coil structures, comprise coil rack and be wound on magnetizing coil L1 and two output winding on coil rack, two output windings are first output winding L2 and the second output winding L3, magnetizing coil L1 is wound on the innermost layer of adjacent coil skeleton, the first output winding L2 and structural symmetry identical with the parameter of the second output winding L3, it is characterized in that: between magnetizing coil L1 and two output winding, be wound with the first constant coil L4 and the second constant coil L5, first constant coil L4 and structural symmetry identical with the parameter of the second constant coil L5, the wire diameter of constant coil is identical with magnetizing coil L1, number of turn n=0.1N ~ the 0.2N of constant coil, N is the number of turn of magnetizing coil L1, the top a of the first output winding L2 is the first output terminal of the first output winding group, the end b of the first output winding L2 is connected with the top e of the first constant coil L4, the end f of the first constant coil L4 is the second output terminal of the first output winding group, the top c of the second output winding L3 is the first output terminal of the second output winding group, and the end d of the second output winding L3 is connected with the end h of the second constant coil L5, and the top g of the second constant coil L5 is the second output terminal of the second output winding group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524873.2A CN104266575A (en) | 2014-10-08 | 2014-10-08 | Coil structure of LVDT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524873.2A CN104266575A (en) | 2014-10-08 | 2014-10-08 | Coil structure of LVDT |
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| Publication Number | Publication Date |
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| CN104266575A true CN104266575A (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410524873.2A Pending CN104266575A (en) | 2014-10-08 | 2014-10-08 | Coil structure of LVDT |
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| CN (1) | CN104266575A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742003A (en) * | 2016-04-25 | 2016-07-06 | 安徽感航电子科技有限公司 | Linear variable differential transformer (LVDT) secondary coil design method and space-winding process employing same |
| CN107121154A (en) * | 2017-05-04 | 2017-09-01 | 宁波拓普智能刹车系统有限公司 | A kind of induction displacement transducer of intelligent braking |
| CN109238121A (en) * | 2018-11-09 | 2019-01-18 | 美钻深海能源科技研发（上海）有限公司 | A kind of underwater kit ohject displacement data detection system and its method |
| CN109633232A (en) * | 2018-12-20 | 2019-04-16 | 安徽感航电子科技有限公司 | The design method of small stroke LVRT bucking coil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1200480A (en) * | 1997-04-16 | 1998-12-02 | 株式会社三丰 | Reduced offset high accuracy induced current position transducer |
| CN1298089A (en) * | 1999-12-02 | 2001-06-06 | 株式会社三丰 | Static capacity type deflexion detecting apparatus |
| DE102005052261A1 (en) * | 2005-11-02 | 2007-05-03 | Robert Bosch Gmbh | Determining method e.g. for defect sensor elements of sensor arrangement, involves having four sensor elements which are switched into row as first and second group |
| US20110234207A1 (en) * | 2010-03-23 | 2011-09-29 | Hans-Juergen Herderich | Magnetic transducer configuration for magnet-based position sensors having improved geometry for more precise position detection |
| CN203323692U (en) * | 2013-05-28 | 2013-12-04 | 上海雷尼威尔技术有限公司 | Detection circuit of displacement sensor |
-
2014
- 2014-10-08 CN CN201410524873.2A patent/CN104266575A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1200480A (en) * | 1997-04-16 | 1998-12-02 | 株式会社三丰 | Reduced offset high accuracy induced current position transducer |
| CN1298089A (en) * | 1999-12-02 | 2001-06-06 | 株式会社三丰 | Static capacity type deflexion detecting apparatus |
| DE102005052261A1 (en) * | 2005-11-02 | 2007-05-03 | Robert Bosch Gmbh | Determining method e.g. for defect sensor elements of sensor arrangement, involves having four sensor elements which are switched into row as first and second group |
| US20110234207A1 (en) * | 2010-03-23 | 2011-09-29 | Hans-Juergen Herderich | Magnetic transducer configuration for magnet-based position sensors having improved geometry for more precise position detection |
| CN203323692U (en) * | 2013-05-28 | 2013-12-04 | 上海雷尼威尔技术有限公司 | Detection circuit of displacement sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742003A (en) * | 2016-04-25 | 2016-07-06 | 安徽感航电子科技有限公司 | Linear variable differential transformer (LVDT) secondary coil design method and space-winding process employing same |
| CN107121154A (en) * | 2017-05-04 | 2017-09-01 | 宁波拓普智能刹车系统有限公司 | A kind of induction displacement transducer of intelligent braking |
| CN109238121A (en) * | 2018-11-09 | 2019-01-18 | 美钻深海能源科技研发（上海）有限公司 | A kind of underwater kit ohject displacement data detection system and its method |
| CN109633232A (en) * | 2018-12-20 | 2019-04-16 | 安徽感航电子科技有限公司 | The design method of small stroke LVRT bucking coil |
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Application publication date: 20150107 |