EP1972026A1 - Antennensystem, zugangskontrollsystem für ein kraftfahrzeug und diagnoseverfahren - Google Patents
Antennensystem, zugangskontrollsystem für ein kraftfahrzeug und diagnoseverfahrenInfo
- Publication number
- EP1972026A1 EP1972026A1 EP06840880A EP06840880A EP1972026A1 EP 1972026 A1 EP1972026 A1 EP 1972026A1 EP 06840880 A EP06840880 A EP 06840880A EP 06840880 A EP06840880 A EP 06840880A EP 1972026 A1 EP1972026 A1 EP 1972026A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- individual
- reference point
- antenna system
- drive path
- 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
Classifications
-
- 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
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
- H01Q1/3241—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems particular used in keyless entry systems
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
Definitions
- the invention relates to an antenna system having a plurality of individual antennas connected in each case in a separate drive path, to which a common signal generator is assigned, and to a drive unit provided for the selective connection of a respective selected drive path. It further relates to an access control system for a motor vehicle with such an antenna system and to a method for determining a faulty individual antenna in such an antenna system.
- motor vehicles may be equipped with so-called "keyless entry" systems in which a keyless opening and closing of the central locking and possibly also a release are enabled by means of a transponder or a mobile identification transmitter
- a control system of the motor vehicle communicates via coded signals with the respective identification transmitter, wherein, for example, after receiving corresponding signals from the information provider and their evaluation in case of a positive identification of an authorized user corresponding releases of the central locking and / or Solving the immobilizer or the like can be issued.
- the control system For communication with the identification transmitter or transponder, the control system transmits suitable signals to the latter.
- the signal transmission usually takes place via a suitable antenna system integrated into the motor vehicle. Due to the variety of possible applications and the individual cases to be considered, a multi-channel antenna system is usually provided in which a A plurality of demand-designed and possibly also arranged in the motor vehicle, each connected in a separate drive path individual antennas are used.
- the individual antennas can be, for example, on the one hand so-called interior and on the other hand so-called outdoor space antennas, can be determined via an indoor antenna due to their arrangement in the vehicle, their range and the like, whether the respective identification transmitter or Transponder is currently in the vehicle interior.
- the individual antenna provided for this purpose is dimensioned and positioned for communication with the identification transmitter or transponder in the event that it is located in the exterior of the vehicle.
- a plurality of such specialized antennas may also be provided in the antenna system both in the interior space and in the exterior area.
- An antenna system of this type in which the individual antennas a common signal transmitter for on-demand communication with the identification transmitter or transponder is assigned, wherein a selective activation or connection of a situationally dependent desired single antenna is provided by selecting their respective Anêtpfad via a central drive unit is, for example of the
- the invention is therefore the object of developing an antenna system of the type mentioned above such that in the event of an error in a particularly simple manner reliable identification of a faulty individual antenna is possible. Furthermore, a particularly favorable method for determining a faulty individual antenna in such an antenna system is to be specified.
- each drive path between the signal transmitter and the respective individual antenna is electrically connected via an associated separation dibde to a common reference point provided for tapping a diagnostic potential as required.
- the invention is based on the consideration that for a particularly simple and determined identification of a faulty individual antenna, the error type or the type of fault should first be determined jointly for all individual antennas, so that in a subsequent second step on the basis of the detected type of fault a particularly targeted Identification of each faulty individual antenna can be done. Accordingly, in the manner of a group diagnosis, a suitable inference for all individual antennas should be drawn together to the appropriate type of error.
- a first step is to collectively determine for all individual antennas whether could be a short circuit to the supply voltage.
- all individual antennas are connected on the input side, ie in the region of their so-called antenna positive pole, to each other in an electrically suitable manner and to a reference point via which a short circuit to the supply voltage can be ascertained.
- the electrical potential of the reference point is then measured in relation to ground in the no-load state. If it is seen between the reference point, which is preferably connected to ground via a suitable resistor, and ground detected an applied voltage greater than zero, it can be concluded as an error type to short circuit to the supply voltage.
- the electrical decoupling of the individual antennas should be guaranteed in case of operation, the isolating diodes are provided which prevent crosstalk of the individual drive paths to each other in case of operation.
- each drive path between the signal transmitter and the respective individual antenna is preferably electrically connected via an associated feed-in separating diode to a common contact point provided for applying a test voltage as required
- test voltage at the contact point should also be able to measure a voltage with respect to ground at the first reference point, and only with a short circuit to ground is this voltage equal to zero, even if the test voltage is applied an unwanted crosstalk between see the driving paths.
- the feed-in isolating diode is preferably connected in the connection between the drive path and the contact such that the connection corresponds to the contact point drive path of the forward direction and the connection to the drive path contact point corresponds to the reverse direction of the feed-in separating diode.
- each drive path in the return region of the respective individual antenna ie in the region of the so-called negative pole of the respective individual antenna, is furthermore advantageously electrically connected to a common second reference point provided for tapping a diagnostic potential as required likewise connected via an assigned isolating diode.
- the antenna current of the individual antennas can be measured in a particularly simple way by tapping the diagnostic potential at the second reference point, which in turn is electrically connected to ground via a suitable resistor, which is a particularly suitable criterion for verifying a short circuit to ground or can be used to identify an "open-load" state.
- the selective control of the separately held An Kunststoffpfa- de and thus the respective individual antennas can be done for example by suitably designed relay arrangements or by suitably selected signal generator.
- a particularly simple and reliable control of the individual drive paths and thus of the individual antennas when using a common signal generator is achievable, since in a particularly advantageous embodiment the drive unit is formed as a multiplexer, preferably as a multiplexer transistor or shunt multiplexer.
- the antenna system is used in an access control system for a motor vehicle, wherein the signal exchange into the motor vehicle integrated K ⁇ ntrollSystems with a mobile identification transmitter via said antenna system.
- the stated object is achieved by determining a general type of fault in a first diagnostic step by measuring a diagnostic potential at the first reference point and optionally at the second reference point.
- the basic recognition of the error type is ensured in the manner of a group diagnosis in a first diagnostic step, so that a test program adapted to the currently present error type can be carried out in the subsequent individual diagnostic steps in which the individually faulty antenna is determined.
- a potential greater than zero is present at the first reference point, it is possible to deduce the type of fault of a short circuit to the supply voltage. However, if a non-zero diagnostic voltage at the first reference point can not be determined, a non-zero test voltage can be selectively applied to the positive terminals of the individual antennas.
- a diagnostic potential different from zero should also be present in the fault-free state at the first reference point. If, however, a diagnosis potential of zero is measured in this state at the first reference point, then in the step of the group diagnosis it can be concluded that there is a short circuit to ground as an error type.
- each drive path is advantageously selected sequentially via the drive unit and subjected to suitable test signals, for example a signal from the signal generator.
- the advantages achieved by the invention are in particular that a reliable identification of a single antenna is made possible for an antenna system of the type mentioned by the orientation of the error detection on a group diagnosis with a particularly simple design and low-level component expenditure.
- the isolating diodes which ensure a reliable decoupling of the individual drive paths from one another, it is possible to determine the respective type of error upstream of the entire antenna system and only then to carry out an individualized troubleshooting using particularly suitable test measures.
- This makes it possible to fully diagnose the individual antennas of the antenna system with particularly low component expenditure and also requires only a small amount of space on the respective component boards.
- diagnosticability is also possible for other multichannel antenna systems, in which the individual antennas are acted upon by suitable individual signal transmitters at the positive or negative pole.
- FIG. 1 an access control system for a motor vehicle
- FIG. 2 schematically an antenna system
- FIG. FIG. 3 shows a flow chart for the execution of a method for error detection
- FIG. 4 shows an alternative antenna system
- FIG. 5 shows a flow chart for the procedure of a method for error detection according to FIG. 4th
- the access control system 1 is provided for wireless authorization release in access or for the operation of a motor vehicle 2 and can in particular as so--called "keyless entry system for keyless n open and close the central locking of the vehicle 2 to be configured.
- the access control system 1 comprises a mobile identification transmitter 4, which exchanges signals with a control system 6 arranged in the motor vehicle 2 by wireless means, for example via a suitably selected radio connection.
- the control system 6 comprises an integrated, unspecified evaluation module, in which a code of the received signal is evaluated individually by means of appropriately stored software, wherein in the case of a positive result of this evaluation of the received signals to a correct identification and thus to a Authorization of the user is closed. If such authorization is recognized, for example, the central locking of the motor vehicle 2 is activated.
- the access control system 1 is therefore among others designed to distinguish due to the communication of the control system 6 with the mobile identification transmitter 4 between different states, which are assigned different release permissions.
- the access control system 1 includes, inter alia, a plurality of antennas, via which the communication with the mobile identification transmitter 4 is handled. If it is determined, for example, that the communication with the mobile identification transmitter 4 takes place via an interior antenna of the access control system 1, it is possible to actively suppress the closing of the vehicle doors.
- control system 6 For signal exchange with the mobile identification transmitter 4, the control system 6 is therefore provided with a multi-channel antenna.
- the antenna system 10 comprises a plurality of individual antennas 14 each connected in a separate drive path 12, of which in the exemplary embodiment according to FIG. 2 for the sake of clarity only two shown
- the antenna system 10 can also comprise more than two, for example five, eight or more, separate drive paths 12 with corresponding individual antennas 14.
- the An breathepfade 12 are connected to a common signal generator 16, in addition to an actual signal generator 18 for the intended signal data, protocols or the like other components such as a coupling coil 20 and in the respective
- An Kunststoffpfad 12 switched coupling capacitors 21 or the like may include.
- a drive unit 22 is furthermore provided which, in the
- 35 is designed as a multiplexer, in particular as a multiplexer transformer or shunt multiplexer.
- the signal generator 16 and the drive unit 22 are within of the respective drive path 12 are respectively connected via the resistor 28 to the so-called positive pole 24 of the respective individual antenna 14.
- each individual antenna 14 is connected within its Anêtpfads 12 each with a separating capacitor 30 which separates the negative pole 26 of the respective individual antenna 14 from ground.
- the serving to adjust the Antennenschigüte resistor 28 can also be moved in the respective drive path 12 in front of said separation capacitor 30.
- the coupling capacitor 21 and the separating capacitor 30 are components of the antenna circuit (21, 14, 28, 30).
- the antenna system 10 is designed for the case of failure, ie in the case of failure of one or more of the individual antennas 14, for a particularly targeted and simple error detection and identification of the faulty individual antenna 14.
- each drive path 12 in the region of the positive pole 24 of the respective individual antenna 14, that is to say between the signal generator 16 and the respective individual antenna 14, is electrically connected to a common first reference point 34 via an associated readout separating diode 32.
- the first reference point 34 is connected via a resistor 36 to ground.
- the readout separating diodes 32 are connected in such a way that the connection from the drive path 12 to the first reference point 34 of the forward direction and the connection from the first reference point 34 to the drive path 12 corresponds to the separation direction of the readout isolation diode 32.
- each individual antenna 14 ie the area between the signal generator 16 and the respective individual antenna 14 of each control path 12 is electrically connected to a common contact point 44 via an associated feed-in separating diode 40 and a resistor 42.
- the feed separation diodes 40 are connected in such a way that the connection from the Contact point 44 to the respective drive path 12 of the forward direction and the connection from the respective drive path 12 to the contact point 44 corresponds to the separation direction of the respective feed-in separation diode 40.
- each drive path 12 of the respective individual antennas 14 is electrically connected to a common second reference point 52 via an associated readout separation diode 50.
- the second reference point 52 is connected to ground via a resistor 54.
- the read-out isolating diodes 50 are in turn connected in such a way that the connection from the drive path 12 to the second reference point 52 corresponds to the forward direction and the connection from the second reference point 52 to the drive path 12 corresponds to the blocking direction of the respective readout isolation diode.
- the antenna system 10 is designed for a step-by-step diagnosis, in which the present error type is first determined jointly for all individual antennas 14 in a first diagnostic step in the manner of a group diagnosis before in a second diagnostic step, the faulty individual antenna 14 is determined on the basis of the determined error type on the basis of suitable test measures.
- the error types "short circuit to the supply voltage”, “short circuit to ground” and “open load” state are used as the error types, the "open load” state being an electrical cut through of the respective individual antenna 14, ie a faulty one electrical connection between the positive pole 24 and the negative pole 26 of the respective individual antenna 14, corresponds.
- a test scheme As shown in the flowchart of FIG. 3 is shown.
- a first test step 60 in a no-load condition, ie with inactive signal transmitter 16 and inactive drive unit 22, it is determined whether a voltage between the first reference point 34 and ground can be measured as the diagnosis potential. If this is the case, the error type is "supply short circuit" as a result of the group diagnosis.
- each driving path 12 is then activated sequentially in the context of the individual diagnosis via the drive unit 22 sequentially by connecting the coupling capacitor 21 to the drive path 12 in each case to ground. If an error-free individual antenna 14 of the respective drive path 12 is thereby switched on, then the voltage measured between the first reference point 34 and ground as diagnosis potential is not changed because of the decoupling by the readout separating diodes 32. If, on the other hand, the drive path 12 with the faulty individual antenna 14 is actuated via the drive unit 22, then the voltage measured as the diagnosis potential at the first reference point 34 approaches zero due to the ground coupling of the multiplexer. As soon as this case occurs, the currently activated individual antenna 14 is thus identified as the faulty individual antenna 14.
- a test voltage is applied to the contact point 44 in the course of the group diagnosis in a subsequent test step 62. Subsequently, it is checked whether a voltage between the first reference point 34 and ground can now be measured as a diagnosis potential. If no voltage between the first reference point 34 and ground can be measured, then
- a continuous signal is output via the signal generator 16. Subsequently, via the drive unit 22 sequentially switched on the An Kunststoffpfade 12 selectively.
- a check is made at the second reference point 52 as to whether a voltage with respect to ground can be detected as the diagnosis potential. This voltage would then correspond to the antenna current through the respective individual antenna 14. If such an antenna current, corresponding to a voltage between the second reference point 52 and ground, can be measured, the proper operation of the respective individual antenna 14 is concluded. On the other hand, if the antenna current is equal to zero, then the currently connected individual antenna 14 is identified as a faulty individual antenna 14.
- the error type "Open Load” is assumed to end the group diagnosis.
- a sequential check is made as to whether a corresponding antenna current can be detected when the respective individual antenna 14 is acted upon by a test pulse.
- a continuous signal is in turn output via the signal generator 16.
- all the drive paths 12 are sequentially selectively switched on via the drive unit 22, wherein in each case for the current individual antenna 14 is checked by means of a voltage measurement between the second reference point 52 and ground, whether an antenna current is detectable. If no voltage between the second reference point 52 and ground can be measured for a single antenna 14 as a diagnosis potential, the current individual antenna 14 is identified as a faulty individual antenna 14.
- test step 60 but also at the beginning of the test voltage can be applied to the contact point 44.
- short circuit to supply or short circuit to earth the reference voltage 34 is greater or less than the example half test voltage.
- an alternative antenna system 70 is shown in which a multi-channel structure is also present, but with each drive path 12 each having a separate signal generator 18 assigned to it.
- the group diagnosis is carried out essentially analogously to the antenna system 10, wherein the individual diagnoses by selective transmission via individual antennas 14, ie via selective activation of the individual signal generator 18, and signal reset at the reference point 52 takes place.
- FIG. 5 A flowchart for performing the diagnosis in this antenna system is shown in FIG. 5 shown.
- Control system 10 11 multi-channel antenna system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006001324 | 2006-01-09 | ||
| PCT/DE2006/002300 WO2007079711A1 (de) | 2006-01-09 | 2006-12-22 | Antennensystem, zugangskontrollsystem für ein kraftfahrzeug und diagnoseverfahren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1972026A1 true EP1972026A1 (de) | 2008-09-24 |
| EP1972026B1 EP1972026B1 (de) | 2009-03-11 |
Family
ID=37944930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06840880A Expired - Fee Related EP1972026B1 (de) | 2006-01-09 | 2006-12-22 | Antennensystem, zugangskontrollsystem für ein kraftfahrzeug und diagnoseverfahren |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8140032B2 (de) |
| EP (1) | EP1972026B1 (de) |
| DE (2) | DE112006000659A5 (de) |
| WO (1) | WO2007079711A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031406B4 (de) * | 2008-07-02 | 2015-12-31 | Frank Schmidt | Empfängervorrichtung, Verwendung einer Empfängervorrichtung, System sowie Verfahren zum energiearmen Empfang von Daten |
| DE102009037497B4 (de) * | 2009-08-13 | 2012-04-12 | Predrag Stevanovic | Diagnosevorrichtung für schlüsselloses Zugangssystem |
| JP5685073B2 (ja) * | 2010-12-17 | 2015-03-18 | 株式会社東海理化電機製作所 | 電子キーシステム |
| US9512643B1 (en) * | 2013-11-14 | 2016-12-06 | Josh Keefe | Door unlocking systems and methods |
| US10712377B2 (en) * | 2016-06-30 | 2020-07-14 | Ge Aviation Systems Llc | Antenna diagnostics for wireless communication unit for communicating engine data |
| FR3059437B1 (fr) * | 2016-11-30 | 2019-01-25 | Continental Automotive France | Procede de diagnostic d'un lien de communication dans un vehicule automobile |
| FR3074379B1 (fr) * | 2017-11-24 | 2020-11-13 | Continental Automotive France | Lecteur d'authentification pour ouvrant de vehicule automobile |
| US11018417B2 (en) * | 2019-04-26 | 2021-05-25 | Nxp B.V. | Short circuit detection apparatus for resonant antenna networks and methods therefor |
| JP7685167B1 (ja) * | 2024-07-17 | 2025-05-29 | 大文字 悠佳 | 現場調査バッグ |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221196A1 (de) * | 1992-06-27 | 1994-01-05 | Teves Gmbh Alfred | Schaltungsanordnung zur Überwachung einer induktiven Schaltung |
| DE19923729A1 (de) * | 1999-05-22 | 2000-11-23 | Nokia Mobile Phones Ltd | Schaltungsanordnung zum Prüfen der Funktionsbereitschaft mindestens einer Antenne |
| DE10004616B4 (de) * | 2000-02-03 | 2008-06-19 | Siemens Ag | Schaltungsanordnung für eine Sende- und/oder Empfangseinrichtung |
| DE10059179C1 (de) * | 2000-11-29 | 2002-06-13 | Siemens Ag | Schaltungsanordnung für eine Antennenanordnung und Verfahren zum Schalten einer Antennenanordnung |
| FR2828286B1 (fr) * | 2001-08-02 | 2003-11-21 | Siemens Automotive Sa | Dispositif de diagnostic pour une antenne |
| FR2841392B1 (fr) * | 2002-06-24 | 2004-09-17 | Johnson Contr Automotive Elect | Dispositif d'emission radioelectrique ayant une unite de gestion centralisee et une pluralite d'antennes d'emission distantes |
| WO2004097749A1 (de) * | 2003-04-25 | 2004-11-11 | Conti Temic Microelectronic Gmbh | Sendevorrichtung eines zugangssystems mit einer anzahl von langwellenantennen |
| DE10334061B8 (de) * | 2003-07-25 | 2008-07-24 | Siemens Ag | Schaltungsanordnung und Verfahren zur Diagnose einer Antennenschaltung |
| DE102004058613A1 (de) * | 2004-12-04 | 2006-06-08 | Conti Temic Microelectronic Gmbh | Sendevorrichtung für mehrere zueinander parallele, unabhängig voneinander über je eine Zuleitung versorgbare Antenne |
-
2006
- 2006-12-22 DE DE112006000659T patent/DE112006000659A5/de not_active Withdrawn
- 2006-12-22 WO PCT/DE2006/002300 patent/WO2007079711A1/de not_active Ceased
- 2006-12-22 EP EP06840880A patent/EP1972026B1/de not_active Expired - Fee Related
- 2006-12-22 DE DE502006003146T patent/DE502006003146D1/de active Active
- 2006-12-22 US US12/159,874 patent/US8140032B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007079711A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112006000659A5 (de) | 2007-12-27 |
| WO2007079711A1 (de) | 2007-07-19 |
| US8140032B2 (en) | 2012-03-20 |
| EP1972026B1 (de) | 2009-03-11 |
| DE502006003146D1 (de) | 2009-04-23 |
| US20080309566A1 (en) | 2008-12-18 |
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