CN114243301A - Magnetic antenna - Google Patents
Magnetic antenna Download PDFInfo
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- CN114243301A CN114243301A CN202111485824.9A CN202111485824A CN114243301A CN 114243301 A CN114243301 A CN 114243301A CN 202111485824 A CN202111485824 A CN 202111485824A CN 114243301 A CN114243301 A CN 114243301A
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- coils
- winding
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- magnetic
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- 238000004804 winding Methods 0.000 claims abstract description 66
- 230000005389 magnetism Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
Abstract
The application discloses magnetism antenna, including the bar magnet and cup joint a plurality of windings on the bar magnet. Each winding comprises a plurality of coils which are arranged in a layered mode from inside to outside, and the number of the coils on each winding is the same as that of the windings; the coils are connected into a channel according to a preset connecting direction, the number of the coils forming the channel is the same as that of the windings, and the coils belong to different windings respectively. The multi-channel magnetic rod has the advantages that the multi-channel magnetic rod is enabled to coexist on one magnetic rod through the special-shaped structure, and no mutual inductance exists. The special structure enables the side lobe of the magnetic antenna to be very small, and the side lobe problem is solved. And the channel impedance is adjustable, and the channel impedance is adjusted through the coil wire diameter.
Description
Technical Field
The application relates to the technical field of train communication, in particular to a magnetic antenna.
Background
The magnetic antenna is widely applied to a railway signal system, is arranged on a train, three signals share the same antenna, and the communication between the train and the ground is realized through the energy conversion of an electromagnetic field, so that the automatic control of the train is realized.
The magnetic antenna can make the electromagnetic wave form a main lobe and a side lobe due to the natural distribution of magnetic lines of force, the magnetic field intensity of the side lobe is slightly smaller than that of the main lobe, the side lobe can be mistaken for the main lobe sometimes, and the normal work of the antenna can be influenced in application. The current method is to process on software, and increase the threshold and the acceptable range to avoid the side lobe influence, so as to overcome the problem of side lobe interference.
In application, three signals are provided, one signal corresponds to one magnetic bar, three magnetic bar antennas are needed to realize the function, and the size is large. Three signals coexist in a magnetic bar to interfere with each other, and the magnetic bar cannot work normally.
Disclosure of Invention
In view of this, the present application provides a magnetic antenna, which solves the problem of side lobe interference and the problem of mutual interference of three magnetic bars coexisting in three paths in hardware.
In order to achieve the above object, the following solutions are proposed:
a magnetic antenna comprising a magnetic rod and a plurality of windings sleeved on the magnetic rod, wherein:
each winding comprises a plurality of coils which are arranged in a layered mode from inside to outside, and the number of the coils on each winding is the same as that of the windings;
the coils are connected into a channel according to a preset connecting direction, the number of the coils forming the channel is the same as that of the windings, the coils are respectively belonging to different windings, and the impedance of each coil is an independent preset value.
Optionally, the cross section of the magnetic bar is rectangular, and the interface of the winding is circular.
Optionally, the winding directions of a plurality of coils constituting the winding are different.
Optionally, the wire diameter and the number of turns of each coil are respectively matched with the matching resistance of the coil.
According to the technical scheme, the magnetic antenna comprises a magnetic rod and a plurality of windings sleeved on the magnetic rod. Each winding comprises a plurality of coils which are arranged in a layered mode from inside to outside, and the number of the coils on each winding is the same as that of the windings; the coils are connected into a channel according to a preset connecting direction, the number of the coils forming the channel is the same as that of the windings, and the coils belong to different windings respectively. The special structure enables multiple channels to coexist on one magnetic rod, and no mutual inductance exists. The special structure enables the side lobe of the magnetic antenna to be very small, and the side lobe problem is solved. And the channel impedance is adjustable, and the channel impedance is adjusted through the coil wire diameter.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view of a magnetic antenna according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a coil of a magnetic antenna according to an embodiment of the present application;
fig. 3 is a schematic diagram of a cross-section of a magnetic antenna of an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Fig. 1 is a front view of a magnetic antenna according to an embodiment of the present application.
As shown in fig. 1, the magnetic antenna provided by the present embodiment is applied to a communication system on a train, and is used for implementing a signal transmission function of train-ground communication. The magnetic antenna is used for providing a plurality of information channels, and specifically comprises a magnetic bar 10 and a plurality of windings 20, wherein the plurality of windings are sequentially sleeved on the magnetic bar according to a preset distance. Each winding in the present application comprises a plurality of relatively independent coils, and the coils are in a layered structure, that is, each winding is formed by layered conductor layers distributed from inside to outside or from outside to inside. The impedances of the plurality of coils may be the same or different.
Considering that the number of information channels for communication between the train and the ground is generally 3, the present embodiment describes the structural composition and the included connection mode of the magnetic antenna by taking 3 channels as an example. In case 3 channels are selected, 3 windings are arranged on the bar, each winding comprising an inner coil, a middle coil and an outer coil arranged in layers from the inside to the outside, so that the 9 coils form a matrix structure, as shown in fig. 2 in particular.
The three windings are respectively a first winding 21, a second winding 22 and a third winding 23, wherein the first winding includes an inner coil 211, a middle coil 212 and an outer coil 213, the second winding includes an inner coil 221, a middle coil 222 and an outer coil 223, and the third winding includes an inner coil 231, a middle coil 232 and an outer coil 233. The winding directions of the coils on each winding are different, for the first winding, the winding directions of the inner, middle and outer coils are respectively positive and negative and reverse, the winding directions of the inner, middle and outer coils of the second winding are respectively positive and negative, and the winding methods of the inner, middle and outer coils of the third winding are respectively reverse and positive. It is to be noted that forward and reverse are relative concepts, and after determining that one direction is a forward direction, the other direction is a reverse direction.
Each coil has two open ends, the specific terminal names are shown in the figure, so that each winding has 6 terminals, and when the open ends of different coils are connected, the coils can be connected into corresponding channels. Each channel comprises different coils which are respectively arranged on different windings, for example, for the specific case of the embodiment, one coil on each winding and 3 coils in total can form one channel through different connection modes, and the configuration of 3 channels can be realized in view of 9 coils in total.
The working frequencies of the three channels are 500Hz, 1000Hz and 2000Hz, specifically, the connection mode of the 500Hz channel is 7-5-5 ' -9-9 ' -6 ', the connection mode of the 1000Hz channel is 2 ' -1-1 ' -8-8 ' -7 ', and the connection mode of the 2000Hz channel is 2-3-3 ' -4-4 ' -6.
It can be seen from the above technical solutions that the present embodiment provides a magnetic antenna, which includes a magnetic rod and a plurality of windings sleeved on the magnetic rod. Each winding comprises a plurality of coils which are arranged in a layered mode from inside to outside, and the number of the coils on each winding is the same as that of the windings; the coils are connected into a channel according to a preset connecting direction, the number of the coils forming the channel is the same as that of the windings, and the coils belong to different windings respectively. The special structure enables multiple channels to coexist on one magnetic rod, and no mutual inductance exists. The special structure enables the side lobe of the magnetic antenna to be very small, and the side lobe problem is solved. And the channel impedance is adjustable, and the channel impedance is adjusted through the coil wire diameter.
In addition, the distribution state of magnetic lines of force is corrected from hardware, and the influence of side lobes of the magnetic antenna is reduced. Generally, the Q value of an antenna product is an important index, the Q value is determined by selecting materials of a magnetic rod and a shell in the design stage at present, and the Q value is adjustable through a winding matrix. In addition, the induction distance of the antenna product is a very important performance index, in order to realize impedance matching, the prior art serially connects a resistor on the antenna, but the induction distance of the antenna is lost, and the induction distance of the antenna is not lost under the condition of meeting the impedance matching.
The magnetic rod in this application has a rectangular cross-section and the winding has a circular cross-section, as shown in fig. 3.
In the winding analytic graph, the technical index inductance can be increased and decreased in an equal proportion according to rules, and the thickness of each coil can be selected according to the requirement of impedance matching, so that the impedance value is adjusted, and the wire diameter of each coil is matched with the matching resistance of the coil.
In view of this, the following values are selected for the parameters of the coils in the present application:
the number of turns of the inner, middle and outer coils of the first winding is 770, 373 and 30 respectively, so that the reactance of the inner, middle and outer coils is 235 Ha Heng, 54 Ha Heng and 0.383 Ha Heng respectively, and the cross-sectional dimensions of the enameled copper wire for winding the coils are 0.78 square millimeter, 1.28 square millimeter and 0.78 square millimeter respectively.
The inner, middle and outer coils of the second winding have numbers of turns of 1212, 143 and 245, respectively, so that the reactances thereof are 790, 11.8 and 0.78, respectively, and the cross-sectional sizes of the enameled copper wires wound around the coils are 0.88 square millimeter, 0.56 square millimeter and 0.78 square millimeter, respectively.
The inner, middle and outer coils of the third winding have numbers of turns of 504, 357 and 48 respectively, so that the reactances are 104, 52 and 1 hah, respectively, and the cross-sectional dimensions of the enameled copper wire wound around the coil are 0.78 square millimeter, 1.28 square millimeter and 0.78 square millimeter respectively.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (4)
1. The magnetic antenna is characterized by comprising a magnetic bar and a plurality of windings sleeved on the magnetic bar, wherein:
each winding comprises a plurality of coils which are arranged in a layered mode from inside to outside, and the number of the coils on each winding is the same as that of the windings;
the coils are connected into a channel according to a preset connecting direction, the number of the coils forming the channel is the same as that of the windings, the coils are respectively belonging to different windings, and the impedance of each coil is an independent preset value.
2. The magnetic antenna of claim 1, wherein the magnetic rod is rectangular in cross-section and the winding interface is circular.
3. The magnetic antenna of claim 1, wherein a plurality of coils constituting the winding are wound in different directions.
4. The magnetic antenna of claim 1, wherein the wire diameter and the number of turns of each of said coils are individually matched to its matching resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111485824.9A CN114243301A (en) | 2021-12-07 | 2021-12-07 | Magnetic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111485824.9A CN114243301A (en) | 2021-12-07 | 2021-12-07 | Magnetic antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243301A true CN114243301A (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111485824.9A Pending CN114243301A (en) | 2021-12-07 | 2021-12-07 | Magnetic antenna |
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| CN (1) | CN114243301A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195829Y (en) * | 1994-04-11 | 1995-04-26 | 夏永祥 | Magnetic antenna for radio |
| JPH11239569A (en) * | 1998-02-25 | 1999-09-07 | Toshiba Corp | Shield type coil unit and active shield type gradient magnetic field coil unit for mri |
| JP2013254835A (en) * | 2012-06-06 | 2013-12-19 | Toshiba Mitsubishi-Electric Industrial System Corp | Transformer and power distribution system using the same |
| CN104956544A (en) * | 2012-12-03 | 2015-09-30 | 恩德莱斯和豪瑟尔两合公司 | Antenna device for transmitting data of a filling state measurement device |
| CN105720371A (en) * | 2016-01-28 | 2016-06-29 | 上海帝可容数字科技有限公司 | Magnetic rod antenna |
| US20170093016A1 (en) * | 2014-06-24 | 2017-03-30 | Asahi Glass Company, Limited | Coil for antenna and antenna system |
| CN206564328U (en) * | 2017-03-22 | 2017-10-17 | 中南大学 | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus |
| CN206921632U (en) * | 2017-06-09 | 2018-01-23 | 东莞天启源汽车科技有限公司 | A kind of magnetic bar type transformer |
| CN112117102A (en) * | 2019-06-19 | 2020-12-22 | 特变电工智能电气有限责任公司 | Split coil structure and transformer |
| CN112435827A (en) * | 2020-11-13 | 2021-03-02 | 临沂昱通新能源科技有限公司 | Structure of high-impedance PFC inductor and processing technology thereof |
| CN213519533U (en) * | 2020-10-30 | 2021-06-22 | 佛山市顺德区伊戈尔电力科技有限公司 | Inductor with coils connected in series inside and outside |
| CN113643875A (en) * | 2021-08-30 | 2021-11-12 | 佛山市顺德区美的电子科技有限公司 | Annular inductor and winding method thereof |
-
2021
- 2021-12-07 CN CN202111485824.9A patent/CN114243301A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195829Y (en) * | 1994-04-11 | 1995-04-26 | 夏永祥 | Magnetic antenna for radio |
| JPH11239569A (en) * | 1998-02-25 | 1999-09-07 | Toshiba Corp | Shield type coil unit and active shield type gradient magnetic field coil unit for mri |
| US6285188B1 (en) * | 1998-02-25 | 2001-09-04 | Kabushiki Kaisha Toshiba | Self-shielded coil with non-inductive winding |
| JP2013254835A (en) * | 2012-06-06 | 2013-12-19 | Toshiba Mitsubishi-Electric Industrial System Corp | Transformer and power distribution system using the same |
| CN104956544A (en) * | 2012-12-03 | 2015-09-30 | 恩德莱斯和豪瑟尔两合公司 | Antenna device for transmitting data of a filling state measurement device |
| US20170093016A1 (en) * | 2014-06-24 | 2017-03-30 | Asahi Glass Company, Limited | Coil for antenna and antenna system |
| CN105720371A (en) * | 2016-01-28 | 2016-06-29 | 上海帝可容数字科技有限公司 | Magnetic rod antenna |
| CN206564328U (en) * | 2017-03-22 | 2017-10-17 | 中南大学 | Transient electromagnetic exploration integrated dual-mode antenna rod and measurement apparatus |
| CN206921632U (en) * | 2017-06-09 | 2018-01-23 | 东莞天启源汽车科技有限公司 | A kind of magnetic bar type transformer |
| CN112117102A (en) * | 2019-06-19 | 2020-12-22 | 特变电工智能电气有限责任公司 | Split coil structure and transformer |
| CN213519533U (en) * | 2020-10-30 | 2021-06-22 | 佛山市顺德区伊戈尔电力科技有限公司 | Inductor with coils connected in series inside and outside |
| CN112435827A (en) * | 2020-11-13 | 2021-03-02 | 临沂昱通新能源科技有限公司 | Structure of high-impedance PFC inductor and processing technology thereof |
| CN113643875A (en) * | 2021-08-30 | 2021-11-12 | 佛山市顺德区美的电子科技有限公司 | Annular inductor and winding method thereof |
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