EP2926411A1 - Antennenvorrichtung zur übertragung von daten eines füllstandsmessgeräts - Google Patents
Antennenvorrichtung zur übertragung von daten eines füllstandsmessgerätsInfo
- Publication number
- EP2926411A1 EP2926411A1 EP13798306.0A EP13798306A EP2926411A1 EP 2926411 A1 EP2926411 A1 EP 2926411A1 EP 13798306 A EP13798306 A EP 13798306A EP 2926411 A1 EP2926411 A1 EP 2926411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- arrangements
- coil arrangements
- straight line
- magnetic 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
- 238000005259 measurement Methods 0.000 title abstract 2
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 14
- 238000000429 assembly Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
-
- 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
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
-
- 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
-
- 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
- H01Q7/08—Ferrite rod or like elongated core
Definitions
- the invention relates to an antenna device for transmitting data of a
- field devices are often used which are used for determining, optimizing and / or
- Sensors such as level gauges, flowmeters, pressure and temperature gauges, conductivity meters, etc. are used to capture process variables
- Detecting process variables level, flow, pressure, temperature or conductivity are actuators, such as valves or pumps, via which the flow of a liquid in a pipe section or the level in a container can be changed.
- actuators such as valves or pumps
- field devices are all devices that are used close to the process and that provide or process process-relevant information.
- field devices are thus also understood as remote I / Os, radio adapters or general devices which are arranged on the field level. A large number of such field devices are produced and sold by Endress + Hauser.
- Bundling as well as the range that separates a near field from a far field.
- a higher degree of bundling is equivalent to a smaller "opening angle" of the transmitted electromagnetic beams.
- the degree of focusing determines how much an antenna can focus.For example, if the antenna device is a larger TV antenna, the antenna device has a smaller range of angular coverage The higher the degree of bundling, the more parallel emitted wavefronts emerge from an antenna, and there are other characteristics such as broadbandness, matching
- the near field is in wavelength with respect to the region immediately adjacent to an antenna device, and the far field is in the ratio of the wavelength at approximately the same distance as the antenna device.
- Far field means, virtually no phase difference between electric and magnetic field and their Deflection directions are perpendicular to each other. This is particularly advantageous for data links over long distances measured at the wavelength at high data rates, such as mobile telephony, WLAN, radio links, Bluetooth, UMTS and LTE, since the radiated energy evenly in the desired direction (s) radiated becomes.
- a characteristic impedance results from the properties of the surrounding atmosphere or of the surrounding material.
- the characteristic impedance for electrically nonconducting materials results from the square root of the ratio of complex permeability to complex permittivity.
- the near field results from an evaluation of a Poynting vector in a transmission case, an energy transfer back into the antenna device to be subsequently radiated again.
- the result is a complex characteristic impedance.
- the proportion of the energy directly returned to the antenna device can be selected by suitable dimensioning. This makes it possible to realize transformers as well as NFC / RFID systems within the near field.
- the transmitted energy is sufficient to fully power a small electronic unit, which includes, for example, a transmitter and other elements.
- An object of the invention is to provide an antenna device which generates signals with a higher selectivity.
- the subject of claim 1 is an antenna device for transmitting data of a
- each coil arrangement i 1, 2,. , n at a position between ⁇ l t and ⁇ i ;
- the coil arrangement can have none, one or more coil cores.
- the coil arrangements i 1, 2,. , n arranged in an order in which the
- An antenna device is characterized by a spatially very limited near field and a very small dimension compared to the wavelength, whereby it is well suited, in particular in the area of digital communications, for example for WirelessHART, Bluetooth, WLAN, DMR446 or SRD (historically LPD), however due to the small near field range is rather unsuitable for NFC and RFID.
- the selectivity of the antenna device with respect to the frequency can be set extremely accurately, for example with a quartz, this is particularly advantageous for very narrow-band communication with little power, therefore power saving for the field over long distances. Also possible are short-distance connections.
- the coil arrangements i 1, 2 ,.
- the phase differences ⁇ can be varied over time.
- the phase differences ⁇ can be half a period. If the phase difference ⁇ is half a period, then the magnetic field lines, the
- Coil arrangements i 1, 2,. , n emerge, with each other and thus generate several small and / or large magnetic vortex fields, which can spread with the help of the associated electric fields. In this case, several small and / or large magnetic vortex fields cause a greater selectivity, which is perceived accordingly by the receiver.
- the voltages i / formed sinusoidal.
- a sinusoidal voltage across the coil assemblies causes circular magnetic
- Vortex fields which also spread in this form and arrive at the recipient.
- the voltages i / formed sinusoidal and are triggered by a digital signal.
- the phase difference within a certain time namely when the voltage is constant, becomes a fixed phase difference set to the other voltages.
- a coil core increases the magnetic field inside the coil.
- the coil lengths i from i to i + 1 by a length ⁇ ; between-h and-h, preferably between-h and-h and more preferably between
- An ideal (passive) antenna has a port with a guided waveguide / signal line and a second port as an opening. If a signal is applied or received at one of these gates, it is transmitted to the other gate. In technical antennas, additional losses occur in this transmission (dielectric losses, ohmic losses of metal elements, conversion into heat). Thus, every technically feasible antenna device reflects a low power component (technical term "finite antenna adaptation"). If the coil lengths of the coil assemblies halve along their order, then the end regions of the coil assemblies are equidistant from each other. This is particularly advantageous for a field removal process. This reflects back a uniform blasting and a very small proportion of power during this detachment.
- Fig. 1 an antenna device of two coil assemblies each having a coil and a coil core
- FIG. 2a shows an antenna device comprising two coil arrangements each having a coil and a coil core and associated equidirectional magnetic field lines
- FIG. 3 shows an antenna device comprising two coil arrangements, each having a coil and a coil core and associated opposing magnetic field lines 4 shows a change of the magnetic field lines of an antenna device with two
- Fig. 5a a change of the magnetic field lines of an antenna device with two
- Fig. 5b a change of the magnetic field lines of an antenna device with two
- 5c shows a change of the magnetic field lines of an antenna device with two coil arrangements during a polarity reversal of a coil arrangement
- Fig. 6 magnetic field lines which propagate with the aid of the corresponding electric field lines
- FIG. 7a magnetic field lines of two coil arrangements which are not operated simultaneously
- FIG. 7b magnetic field lines of two coil arrangements which are operated simultaneously
- Fig. 8a magnetic field lines of two coil arrangements, which overlap each other
- Fig. 8b superimposed magnetic field lines of two coil assemblies that generate new magnetic vortex fields
- Fig. 9b newly generated magnetic vortex fields and the next period of not yet superimposed magnetic field lines of two coil assemblies
- Fig. 10 superimposed magnetic field lines of three coil arrangements
- an antenna device k is shown with a first coil assembly a, a first coil C and a first U-shaped coil core B, wherein the first coil core B is formed as a ferrite rod.
- a second coil arrangement b with a second U-shaped coil core D and a second coil E is located at a distance s x from the first coil arrangement a.
- the first and the second coil arrangements a, b are arranged in the drawing plane and both have a common straight line e, the straight line e being identical to the transverse axis of both coil arrangements a, b.
- the coil arrangements a, b have end regions A which are arranged equidistant from one another in a second plane which is perpendicular to the plane of the drawing.
- the coil arrangements a, b can also be rotated with the straight line e as a rotation axis against each other or arranged crosswise.
- a point j is arranged, in the directions of which the first and the second coil arrangements a, b are curved.
- Coil arrangement a has a first coil length Z x and the second coil arrangement b has a coil length l 2 , wherein the coil lengths l lt l 2 are respectively measured between the end regions A of the respective coil arrangement a, b.
- Coil arrangement a to the second coil arrangement b is in this embodiment a quarter l. Furthermore, the coil assemblies a, b each include a cutting angle g with the straight line e, which is 90 ° in this embodiment. Furthermore, the
- Coil arrangements a, b each have a first and a second coil diameter d x or d 2 .
- a first voltage U is applied to the first coil core C, then a first magnetic field H is generated with a first outer direction I and a first inner direction J, wherein the magnetic field H through the end portions A of the first bobbin B on or
- a second voltage U 2 is applied to the second coil core E, then a second magnetic field G with a second outer direction K and a second inner direction L is generated. If the first voltage U and the second voltage U 2 are the same polarity, then the outer directions K, I and the inner directions L, J are in the same direction.
- the magnetic fields G, H interact substantially only outside the coil cores B, D above a plane F. Are the coil cores, D B applied voltages U lt U 2 of opposite polarity, which generate cores B, D magnetic fields G, H with opposite directions I, J and K, L.
- PIN diodes so-called PIN diodes, and SMD RF transistors which can be used at a frequency up to 26.5 GHz and few other RF transistors beyond the frequency of 100 GHz.
- Phase locked loop also referred to as PLL circuit, from design variant with reconstruction of the transmitter phase position.
- the coil arrangements a, b must be dimensioned differently, so that the shortest possible near field area, and as broad as possible antenna lobe
- Antenna diagram is achieved in order to achieve the best possible and clean detachment of the magnetic field from the antenna device k.
- FIG. 4 shows a first field configuration M and a second field configuration N of magnetic fields.
- the first field configuration M shows the first magnetic field Q of a first coil arrangement a and the second magnetic field R of a second coil arrangement b.
- the coils C, E of the coil arrangements a, b are so applied to the first and the second voltage U 2 that the first magnetic field Q and the second magnetic field R are in opposite directions.
- a field change P can take place between the field configuration M and the field configuration N.
- Coil arrangements a, b are now subjected to such a degree to the first and the second voltage U 2 that the first magnetic field Q and the second magnetic field R are in the same direction. It is irrelevant which of these two magnetic fields Q, R has been changed, as well as one or both coil arrangements a, b can be rotated against each other, wherein a rotation can be varied over time. It is essential that the magnetic fields Q, R perform a change of direction relative to each other.
- a wiring is digital or quasi-digital, i. without intermediate breaks.
- the current direction of the first coil arrangement a is kept constant, and the current direction of the second coil arrangement b is reversed abruptly. Circuitically, this is relatively easy to implement and possible by inexpensive digital technology, for example on two CMOS-compatible output channels of an existing
- a current flowing through the first coil core B of the first coil arrangement a is switched off after a reversal of the polarity of the second coil core D of the second coil arrangement b.
- a sinusoidal or sine-like (for example, raised-cosine or two quasi-sine digital outputs of a digital circuit, PWM, analog filter, smoothing capacitor, etc.) current is used. This makes it possible to realize a better behavior of the antenna device k than according to FIG. 5a.
- FIG. 5c A further variant is shown in Fig. 5c, using DC voltage in one of the coil assemblies a, b or the use of a permanent magnet.
- the current through the first bobbin B is kept constant and the current through the second bobbin D alternately reversed and / or turned off.
- hybrid forms are possible, for example a sinusoidal (FIG. 5b) or digital (FIG. 5a) control of a coil arrangement a, b together with a DC voltage (FIG. 5c) or the digital control (FIG. 5a) of one of the coil arrangements a, b and a sinusoidal drive (FIG. 5b) of one of the other coil arrangements a, b.
- FIG. 6 A distribution of the magnetic fields and their detachment from the antenna device k are shown in FIG. 6 and will be described in detail below with the aid of further illustrations.
- FIG. 7a analogous to FIG. 3, a third magnetic field S of the first coil arrangement a and a fourth magnetic field T of a second coil arrangement b are shown.
- the magnetic fields S, T each have a first outer direction I and a second outer direction L, respectively.
- Each of the magnetic fields S, T is divided by several
- the number of magnetic field lines is proportional to the respective field density of the respective magnetic field S, T. Consequently, the first magnetic field S has a smaller field density than the second magnetic field T.
- Coil cores C, E of the coil assemblies a, b successively energized become.
- T To achieve an interaction of the magnetic fields S, T must be
- Coil cores C, E are energized simultaneously. If these fields interact with one another, a distribution of the magnetic fields according to FIG. 7b results with a first region V and a second region W in which the magnetic fields S, T attract. By this attraction, a third area U is generated, in which the
- an antenna device k with three coil arrangements a, b, c is shown. These can be rotated against each other, the line e serves as a rotation axis. Due to the exact time of change, a three-dimensional spread can be favored; also by a plurality of at a fixed angle to each other - for example, 90 °, 60 ° or 45 ° - arranged coil assemblies a, b, c, which are each driven in parallel or slightly offset in time. By a suitable choice of parameters, for example, a circular polarization or an elliptical main lobe can be achieved.
Landscapes
- Near-Field Transmission Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012111732.2A DE102012111732A1 (de) | 2012-12-03 | 2012-12-03 | Antennenvorrichtung zur Übertragung von Daten eines Füllstandsmessgeräts |
PCT/EP2013/074689 WO2014086616A1 (de) | 2012-12-03 | 2013-11-26 | Antennenvorrichtung zur übertragung von daten eines füllstandsmessgeräts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2926411A1 true EP2926411A1 (de) | 2015-10-07 |
EP2926411B1 EP2926411B1 (de) | 2019-08-14 |
Family
ID=49679513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13798306.0A Active EP2926411B1 (de) | 2012-12-03 | 2013-11-26 | Antennenvorrichtung zur übertragung von daten eines füllstandsmessgeräts |
Country Status (5)
Country | Link |
---|---|
US (1) | US9812781B2 (de) |
EP (1) | EP2926411B1 (de) |
CN (1) | CN104956544B (de) |
DE (1) | DE102012111732A1 (de) |
WO (1) | WO2014086616A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170229777A1 (en) * | 2016-02-04 | 2017-08-10 | Samsung Electro-Mechanics Co., Ltd. | Antenna structure and antenna apparatus |
FR3056831B1 (fr) * | 2016-09-26 | 2019-08-02 | Tdf | Antenne a tiges ferromagnetiques bobinees et couplees entre elles |
DE102017121036A1 (de) * | 2017-09-12 | 2019-03-14 | Endress+Hauser SE+Co. KG | Feldgerät mit drahtloser Sende-/Empfangseinheit |
CN114243301A (zh) * | 2021-12-07 | 2022-03-25 | 北京铁路信号有限公司 | 一种磁性天线 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH335727A (de) * | 1954-08-21 | 1959-01-31 | Philips Nv | Drehantenne für den Einbau in ein Funkempfangsgerät |
GB1058812A (en) | 1963-06-21 | 1967-02-15 | Sumitomo Electric Industries | Improvements in or relating to antennae |
JPH08102613A (ja) * | 1994-09-30 | 1996-04-16 | Alpha Corp | 無線送信回路 |
DE19717505C2 (de) * | 1997-04-25 | 1999-02-18 | Diehl Ident Gmbh | Transponder-Kommunikationseinrichtung |
KR100746742B1 (ko) * | 2001-02-03 | 2007-08-06 | 삼성전자주식회사 | 리더 코일 안테나 및 이를 이용한 비접촉 카드 인증 시스템 |
EP1586135A1 (de) * | 2003-01-23 | 2005-10-19 | Vacuumschmelze GmbH & Co. KG | Antennenkern |
DE102004025076B4 (de) * | 2004-05-21 | 2006-04-20 | Minebea Co., Ltd. | Spulenanordnung und Verfahren zu deren Herstellung |
DE102004028997A1 (de) | 2004-06-16 | 2006-01-05 | Robert Bosch Gmbh | Verfahren zur Beeinflussung der Russanlagerung auf Sensoren |
DE102004038574A1 (de) * | 2004-08-06 | 2006-03-16 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Übertragung von breitbandigen Hochfrequenzsignale |
US20090128436A1 (en) * | 2005-04-14 | 2009-05-21 | Agency For Science, Technology And Research | On-chip inductor with trimmable inductance, a method for making the same and a method for adjusting the impedance of the inductance |
DE102005051493A1 (de) * | 2005-10-26 | 2007-07-05 | ACG Identification Technologies Gesellschaft mbH, Grambach | Vorrichtung zur abhörgeschützten Nahfeld-Kommunikation mit induktiven Transpondern elektronischer Dokumente |
TW200826354A (en) * | 2006-12-06 | 2008-06-16 | Lite On Technology Corp | Digital television receiving antenna for plug-and-play device |
US8077105B2 (en) * | 2008-04-04 | 2011-12-13 | Toko Inc. | Directive bar-type antenna |
DE102008043298A1 (de) * | 2008-10-29 | 2010-05-06 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Induktiv koppelnde Steckverbinderkupplung mit Vorortbedienfunktion |
DE102009019724A1 (de) * | 2009-05-05 | 2010-11-11 | Neosid Pemetzrieder Gmbh & Co. Kg | Transponder für RFID-Anwendungen sowie Verfahren zur Auslegung eines solchen Transponders |
US20110050531A1 (en) * | 2009-08-28 | 2011-03-03 | Panasonic Corporation | Antenna unit and communication device using the same |
DE102010029762A1 (de) | 2010-06-07 | 2011-12-08 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Verfahren zur Bestimmung einer Restkopplung eines induktiven Leitfähigkeitssensors |
FR2974259B1 (fr) * | 2011-04-18 | 2013-06-07 | Commissariat Energie Atomique | Recepteur alimente par une interface sans fil de type inductif |
DE102011104878A1 (de) | 2011-06-07 | 2012-12-13 | Hella Kgaa Hueck & Co. | Antennenvorrichtung |
DE102011081268A1 (de) | 2011-08-19 | 2013-02-21 | Endress + Hauser Gmbh + Co. Kg | Feldgerät zur Bestimmung oder Überwachung einer physikalischen oder chemischen Prozessgröße in der Automatisierungstechnik |
DE102011081517A1 (de) | 2011-08-24 | 2013-02-28 | Endress + Hauser Gmbh + Co. Kg | Feldgerät für die Automatisierungstechnik |
DE102011082002A1 (de) | 2011-09-01 | 2013-03-07 | Endress + Hauser Gmbh + Co. Kg | Verfahren sowie System zur drahtlosen Datenübertragung |
DE102011087588A1 (de) | 2011-12-01 | 2013-06-06 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Feldgerät für die Automatisierungstechnik |
-
2012
- 2012-12-03 DE DE102012111732.2A patent/DE102012111732A1/de not_active Withdrawn
-
2013
- 2013-11-26 CN CN201380063180.1A patent/CN104956544B/zh active Active
- 2013-11-26 EP EP13798306.0A patent/EP2926411B1/de active Active
- 2013-11-26 US US14/648,962 patent/US9812781B2/en active Active
- 2013-11-26 WO PCT/EP2013/074689 patent/WO2014086616A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014086616A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20150325916A1 (en) | 2015-11-12 |
WO2014086616A1 (de) | 2014-06-12 |
EP2926411B1 (de) | 2019-08-14 |
CN104956544A (zh) | 2015-09-30 |
DE102012111732A1 (de) | 2014-06-05 |
US9812781B2 (en) | 2017-11-07 |
CN104956544B (zh) | 2018-06-05 |
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