CN102800925A - Magnetic induction antenna arrangement - Google Patents
Magnetic induction antenna arrangement Download PDFInfo
- Publication number
- CN102800925A CN102800925A CN2011101815646A CN201110181564A CN102800925A CN 102800925 A CN102800925 A CN 102800925A CN 2011101815646 A CN2011101815646 A CN 2011101815646A CN 201110181564 A CN201110181564 A CN 201110181564A CN 102800925 A CN102800925 A CN 102800925A
- Authority
- CN
- China
- Prior art keywords
- antenna
- magnetic induction
- label
- antenna assembly
- electromagnetic field
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 35
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 21
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
- B61L3/126—Constructional details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
- B61L3/121—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using magnetic induction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3225—Cooperation with the rails or the road
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention relates to a magnetic induction antenna arrangement comprising an electrically conducting loop (1) forming a first antenna (2) for powering tags over the entire range from high to low distances between the first antenna (2) and the tag by producing a first electromagnetic field. The conducting loop (1) or a second conducting loop forms at least one second antenna (3), which is arranged in such a manner that a second electromagnetic field produced by the second antenna (3) partially cancels the first electromagnetic field produced by the first antenna (2).
Description
Technical field
The present invention relates to be used to use the magnetic induction antenna assembly of the magnetic-coupled contactless information transmission system.The invention still further relates to the corresponding data transmission method that uses this magnetic induction antenna assembly.
The magnetic induction antenna assembly with and the equipment that is commonly called label (tag) that is coupled and comprise information constitute air transformer near this magnetic induction antenna is positioned at this label the time.Such system for example is used for reading the vehicles of roadside label during travel.Under the situation of railway traffic instrument, use above-mentioned label to come to send information to the train of process from trackside.A kind of standardized means is with reference to having the European Rail Traffic Management System of the label of French speech transponder (balise).Above it through out-of-date, the transponder link is established at the antenna assembly of train.This link is that two-way and employed frequency is the radio frequency shortwave.Down link is used for to the transponder transmitting power.Up link is used for sending data to train.Meet the condition of appointment through it at label with along the volume that carries out contactless message transmission between the magnetic induction antenna of its process, for example be called as contact volume (contact volume) about the activation power that is sent.
The problem that the present invention will solve is to design the little magnetic induction antenna with maximization contact volume.This allows to read the label of magnetic induction antenna with higher speed process.
Background technology
Label away from the time, when it was fully supplied power, increase activating power (promptly increasing the electric current through the magnetic induction antenna assembly) had increased the external shape that contacts volume.When passing through label at high speed, through repeating this information, can the longer time durations that allows the transmission more data or increase reliability read this label this.Yet,, increase the restriction that power receives maximum allowable power when magnetic induction line antenna during near label.If exceed this power, then may destroy label.The other type that improves the contact volume is the size that increases antenna assembly, but for example for railway applications, there is restriction in the below that can be installed in train about great antenna assembly.And because actual, antenna assembly be confined to be installed in the transponder top some highly locate, best height and lateral shift always must not taken into account.
Known arrangement relates to simple conducting ring form, typically about rectangle, as shown in the US2007/0100517A1.Read the bigger magnetic induction line antenna of characteristic requirements and read transponder at a high speed.
Summary of the invention
According to the present invention, said magnetic induction line antenna assembly comprises the conducting ring that forms first antenna, and said first antenna is used for coming tag-powered on the distance gamut from high to low between said first antenna and the label through producing first electromagnetic field.Said conducting ring or at least one second conducting ring form at least one second antenna, and said at least one second antenna is provided with so that second electromagnetic field that is produced by said second antenna is partly offset the mode of first electromagnetic field that is produced by said first antenna.Thereby the direction of an electric field in first antenna is opposite with the electric field of offsetting antenna.This can realize through the direction of counter-rotating winding.Specifically; The magnetic flux of the electromagnetic field that is produced by first antenna is offset on above-mentioned at least one second antenna part ground; Wherein this magnetic flux is maximum so that compare with the magnetic flux that produces by first antenna, according to the total magnetic flux of the position on direct of travel more near constant magnetic flux.
Specifically, at least one recess (recess) in the ring that forms first antenna can form at least one and offset antenna (i.e. second antenna).Said counteracting antenna also can be independent ring (being winding), the present invention relates to comprise the antenna assembly of one or several rings like this.
Under the situation of the single ring that comprises first antenna and at least one second antenna; Following description is proposed: thus a kind of be used to generate an electromagnetic field come to magnetic induction antenna assembly tag-powered and that be used for the information that receives from said label conversely via wireless transmission, wherein through magnetic induction:
-said antenna assembly comprise conducting ring and
-said ring surround through extending at the profile place in zone said zone and
-said profile comprises the bossing and at least one recessed portion that is formed by said ring.
The female part and bossing can be the sharpened edge and/or the bend of conducting ring.For example, the standard rectangular ring that has four edges only comprises four bossings (being the edge).Utilization assigns to form at least one recess by said ring institute area surrounded through inserting at least one recess, can revise and only have bossing (except with being connected of antenna control unit) straight-flanked ring or any other ring of this standard.At recessed portion is under the situation of sharpened edge, and each recess has at least two recessed portions.Yet alternatively, the single recessed bending that can begin respectively through the bossing at said ring and finish forms recess.It also is possible being used to form the bossing of recess and the mixing of recessed portion.
Preferably, single ring comprises two recesses, and these two recesses are provided with about the symmetrical line that said ring is cut into two halves with being mutually symmetrical.
The present invention has improved the contact volume so that little magnetic induction antenna assembly can activate label along the distance that extends, thereby can be with the duration sufficient to guarantee reliability of higher speed through label and transfer of data.This is suitable for having the antenna assembly that on the vehicles, reads the roadside transponder or has the railway applications of vehicle-mounted label and roadside antenna device.
The present invention has positive impact for the design of vehicle-mounted receiver.Since antenna during near label the magnetic coupling this means that by partial offset the dynamic range of the intensity of the signal that is received by train becomes littler.The dynamic range of the signal strength signal intensity that reduces means and can make vehicle-mounted receiver more accurate.And, having influenced antenna in a similar fashion and may be placed on the magnetic coupling between near any cable of track, this makes train unlikely obtain undesired signal.
Description of drawings
Fig. 1 shows the magnetic induction antenna assembly that comprises the single conducting ring with two recesses, and shows the roadside label that comprises straight-flanked ring.
Fig. 2 shows according to length travel and is located at the magnetic flux in the reference rings (reference loop) of two different antennas below at a certain height place.
Fig. 3 shows when two antennas are positioned at the top that is higher than said reference rings the magnetic flux according to length travel.
Embodiment
Preferred embodiment is the transponder antenna of magnetic induction antenna as the railway traffic instrument that the is positioned at below that is directed against European Rail Traffic Management System.The down-link performance of antenna judges that through it produces magnetic flux in predefined reference rings ability this predefined reference rings is arranged in all places of antenna below.Do not operate outside particular time interval owing to require this transponder, so the amount of magnetic flux should remain in this time interval.If this magnetic flux grade is too low, then will not have enough energy to come the transponder circuit supply, and if this magnetic flux grade too high, then transponder may meet with permanent damages.When train is being kept required magnetic flux, passing through transponder, confirm the contact volume by the distance that air gap and this train are advanced.If train is advanced very apace and to contact volume too little, then will not have time enough to supply transponder to power on and send data reliably to train.The present invention has improved the contact volume so that can the successful execution transfer of data when train speed is very high.
Can the shape according to the ring of preferred embodiment be thought a plurality of stacked antennas, for example common squaerial and at antenna assembly some other antennas with negative mode effect during near label or reference rings.
Fig. 1 shows the birds-eye view according to magnetic induction antenna assembly of the present invention, and this magnetic induction antenna can be installed in the below of railway traffic instrument.Said antenna system is made up of single conducting ring 1.Formed outside first antenna 2 and two inside antennas 3, outside first antenna 2 has rectangular shape, and two inside antennas 3 are partly offset first antenna 2 in label and antenna 2, the field apart from the lower between 3.These antenna 3 forms the recess with recessed portion in conducting ring 1, promptly some in the interior angle are reflex angle, promptly＞180 °.Except conducting ring, the magnetic induction antenna also comprises control unit 4.The roadside label that be called as " transponder " 5 power supplies of ring 1 between two rails 6 that are installed in railroad track.
As mentioned, comprise two recesses by 1 area surrounded of ring.In this example, recessed portion 8a, 8b, 8c, the 8d of recess are the sharpened edges of the electric conducting material of ring.Utilize 7a-7h to come the bossing of representative ring 1, above-mentioned in this example bossing also is a sharpened edge.In the bossing four, promptly bossing 7c, 7d, 7g, 7h are the transition portions between first antenna 2 and each second antenna 3.Two antennas 3 are mutually symmetrical.
Fig. 2 shows according to length travel and is located at the magnetic flux in the reference rings of below of two different antennas at a certain height place.When reference rings under antenna assembly when (centred below), this magnetic flux is maximum.Imaginary curve shows the magnetic flux from the magnetic induction antenna assembly of the prior art with squaerial.Solid-line curve shows the magnetic flux from the magnetic induction antenna assembly of (particularly according to Fig. 1) according to the present invention.Because this magnetic flux depends on the geometry of antenna assembly and reference rings and the electric current in the antenna assembly, the therefore possible above-mentioned curve of standardization is so that their maximum flux grade is consistent.This point shows in the drawings.Magnetic flux gradient of the present invention is much lower.This is desired, and this allows under the situation that does not exceed maximum transmission power along longer apart from reading tag.
Fig. 3 shows when two antennas are positioned at the top that is higher than said reference rings the magnetic flux according to length travel.The difference of gradient aspect is not so remarkable, but it is not too important because when antenna assembly and reference rings more near the time, for all shift values to all higher now according to the magnetic flux of antenna assembly of the present invention, but it never exceeds greatest level.This means,, compare with the antenna assembly of prior art regardless of the setting height(from bottom) of this antenna assembly, always bigger to contact volume according to antenna assembly of the present invention.
The tabulation of reference number in the accompanying drawing
1 conducting ring
2 pairs of tag-powered antennas on distance gamut from high to low
3 partly offset first antenna with the distance lower (low distance) of label locate the field antenna
4 emittor/receivers
5 roadside labels " transponder "
The rail of 6 railroad tracks
7 raised brim
8 recessed edges
Claims (8)
1. magnetic induction antenna assembly; Comprise the conducting ring (1) that forms first antenna (2); Said first antenna (2) is used for coming tag-powered on the distance gamut from high to low between said first antenna (2) and the label through producing first electromagnetic field, it is characterized in that
Said conducting ring (1) or second conducting ring form at least one second antenna (3), and said at least one second antenna (3) is provided with so that second electromagnetic field that is produced by said second antenna (3) is partly offset the mode of first electromagnetic field that is produced by said first antenna (2).
2. magnetic induction antenna assembly according to claim 1 is characterized in that,
Said at least one second antenna (3) forms recessed recess in said conducting ring (1).
3. thereby one kind is used to generate an electromagnetic field and comes to magnetic induction antenna assembly tag-powered and that be used for the information that receives from said label conversely via wireless transmission, wherein through magnetic induction:
-said antenna assembly comprise conducting ring (1) and
-said ring (1) surrounds said zone through extending at the profile place in zone,
It is characterized in that,
-said profile comprises the bossing and at least one recessed portion that is formed by said ring (1).
4. a use is according to the data transmission method of one magnetic induction antenna assembly in the aforementioned claim, wherein
-be installed in vehicles place said magnetic induction antenna assembly through generating an electromagnetic field to said tag-powered during through label at the said vehicles,
-said label comes via wireless data transmission to said vehicles return information through using said power supply.
5. method according to claim 4 is characterized in that,
Said magnetic induction antenna system is installed in the below of railway traffic instrument, and the said vehicles the said label of process be transponder.
6. a use is according to the data transmission method of one magnetic induction antenna assembly among the claim 1-3, wherein
-said magnetic induction antenna assembly by the said vehicles through and through generating an electromagnetic field to being installed in the tag-powered of said vehicles place,
-said label is through the wireless data transmission return information.
7. method according to claim 6 is characterized in that,
Said label is installed in the below of railway traffic instrument, and said magnetic induction antenna system is installed in the track place.
8. according to a described method among the claim 4-7, the conducting ring of wherein said magnetic induction antenna assembly (1) is used to generate an electromagnetic field, and
-said ring (1) surrounds said zone through extending at the profile place in zone,
-said profile comprises the bossing and at least one recessed portion that is formed by said ring (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11167547.6A EP2527225B1 (en) | 2011-05-25 | 2011-05-25 | Magnetic induction antenna arrangement |
| EP11167547.6 | 2011-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102800925A true CN102800925A (en) | 2012-11-28 |
| CN102800925B CN102800925B (en) | 2016-01-20 |
Family
ID=44117939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110181564.6A Active CN102800925B (en) | 2011-05-25 | 2011-06-23 | Magnetic induction antenna assembly |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2527225B1 (en) |
| CN (1) | CN102800925B (en) |
| ES (1) | ES2578508T3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636852A (en) * | 2013-10-15 | 2016-06-01 | 西门子公司 | Eurobalise vehicle device and method for operating a eurobalise vehicle device |
| CN108232418A (en) * | 2016-12-20 | 2018-06-29 | 莱森西斯澳大利亚私人有限公司 | Antenna |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2851262A1 (en) | 2013-09-18 | 2015-03-25 | Bombardier Transportation GmbH | An antenna arrangement and a method for determining the absolute speed of a rail vehicle |
| CN105220588B (en) * | 2015-11-02 | 2017-01-18 | 青岛瑞铁电工科技有限公司 | Magnetic steel replacer |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099227A (en) * | 1989-07-18 | 1992-03-24 | Indala Corporation | Proximity detecting apparatus |
| CN1243609A (en) * | 1997-01-14 | 2000-02-02 | 检查点系统有限公司 | Multiple loop antenna |
| US20030197653A1 (en) * | 2002-04-22 | 2003-10-23 | Russell Barber | RFID antenna apparatus and system |
| FR2873341A1 (en) * | 2004-07-21 | 2006-01-27 | Siemens Transp Systems Soc Par | Electromagnetic coupling device for electric remote power feeding system of vehicle, has secondary coils placed on sides of power transmitting coil, where current passing through secondary coils is in same direction as that in power coil |
| US20060197939A1 (en) * | 2005-03-07 | 2006-09-07 | Schweizerische Bundesbahnen Sbb | Identification system and method of determining motion information |
| EP1860597A1 (en) * | 2006-05-23 | 2007-11-28 | Schweizerische Bundesbahnen SBB | Transmission unit for an inductive identification system and inductive identification system |
| CN101136505A (en) * | 2006-08-31 | 2008-03-05 | 株式会社卡西欧日立移动通信 | Antenna and portable electronic device |
| CN101369682A (en) * | 2007-08-17 | 2009-02-18 | 数伦计算机技术（上海）有限公司 | Pavement antenna apparatus and its array |
| WO2009059997A1 (en) * | 2007-11-05 | 2009-05-14 | Commissariat A L'energie Atomique | Wideband inductive antenna for contactless communication systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2819772B1 (en) * | 2001-01-22 | 2004-05-28 | Alstom | DEVICE AND METHOD FOR THE PUNCTUAL LOCATION OF A RAIL VEHICLE ALONG A RAIL TRACK EQUIPPED WITH BEACONS AND ANTENNA FOR EQUIPPING SUCH A DEVICE |
| KR100402348B1 (en) | 2003-07-02 | 2003-10-22 | Bong Taek Kim | Automatic train protection stop device for controlling railroad using data communication |
-
2011
- 2011-05-25 EP EP11167547.6A patent/EP2527225B1/en active Active
- 2011-05-25 ES ES11167547.6T patent/ES2578508T3/en active Active
- 2011-06-23 CN CN201110181564.6A patent/CN102800925B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099227A (en) * | 1989-07-18 | 1992-03-24 | Indala Corporation | Proximity detecting apparatus |
| CN1243609A (en) * | 1997-01-14 | 2000-02-02 | 检查点系统有限公司 | Multiple loop antenna |
| US20030197653A1 (en) * | 2002-04-22 | 2003-10-23 | Russell Barber | RFID antenna apparatus and system |
| FR2873341A1 (en) * | 2004-07-21 | 2006-01-27 | Siemens Transp Systems Soc Par | Electromagnetic coupling device for electric remote power feeding system of vehicle, has secondary coils placed on sides of power transmitting coil, where current passing through secondary coils is in same direction as that in power coil |
| US20060197939A1 (en) * | 2005-03-07 | 2006-09-07 | Schweizerische Bundesbahnen Sbb | Identification system and method of determining motion information |
| EP1860597A1 (en) * | 2006-05-23 | 2007-11-28 | Schweizerische Bundesbahnen SBB | Transmission unit for an inductive identification system and inductive identification system |
| CN101136505A (en) * | 2006-08-31 | 2008-03-05 | 株式会社卡西欧日立移动通信 | Antenna and portable electronic device |
| CN101369682A (en) * | 2007-08-17 | 2009-02-18 | 数伦计算机技术（上海）有限公司 | Pavement antenna apparatus and its array |
| WO2009059997A1 (en) * | 2007-11-05 | 2009-05-14 | Commissariat A L'energie Atomique | Wideband inductive antenna for contactless communication systems |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636852A (en) * | 2013-10-15 | 2016-06-01 | 西门子公司 | Eurobalise vehicle device and method for operating a eurobalise vehicle device |
| CN108232418A (en) * | 2016-12-20 | 2018-06-29 | 莱森西斯澳大利亚私人有限公司 | Antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102800925B (en) | 2016-01-20 |
| EP2527225B1 (en) | 2016-04-27 |
| ES2578508T3 (en) | 2016-07-27 |
| EP2527225A1 (en) | 2012-11-28 |
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