DE102005034958A1 - Method associating signals from tire monitoring modules, with individual wheels of vehicle including spare, evaluates doppler shift of signals received - Google Patents
Method associating signals from tire monitoring modules, with individual wheels of vehicle including spare, evaluates doppler shift of signals received Download PDFInfo
- Publication number
- DE102005034958A1 DE102005034958A1 DE200510034958 DE102005034958A DE102005034958A1 DE 102005034958 A1 DE102005034958 A1 DE 102005034958A1 DE 200510034958 DE200510034958 DE 200510034958 DE 102005034958 A DE102005034958 A DE 102005034958A DE 102005034958 A1 DE102005034958 A1 DE 102005034958A1
- Authority
- DE
- Germany
- Prior art keywords
- tire
- wheel
- module
- vehicle
- allocation method
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000012544 monitoring process Methods 0.000 title claims description 14
- 238000004590 computer program Methods 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims abstract description 3
- 230000001154 acute effect Effects 0.000 abstract description 2
- 230000001419 dependent effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
- B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
Abstract
Description
Die Erfindung betrifft ein Zuordnungsverfahren für Reifenmodule in Reifenluftdrucküberwachungssystemen von Kraftfahrzeugen gemäß Oberbegriff von Anspruch 1. Ferner betrifft die Erfindung ein Computerprogrammprodukt gemäß Anspruch 9.The The invention relates to an allocation method for tire modules in tire air pressure monitoring systems of motor vehicles according to the preamble of claim 1. Furthermore, the invention relates to a computer program product according to claim 9th
In modernen Kraftfahrzeugen werden vermehrt Reifenluftdrucküberwachungssysteme zur Erfassung des Reifenluftdrucks verwendet. Es hat sich gezeigt, dass viele Unfälle, bei denen ein Reifenschaden die Ursache war, auf einen falschen Reifenluftdruck zurückzuführen sind. Daher ist eine Überwachung des Reifenluftdrucks im Hinblick auf die Sicherheit der Fahrzeuginsassen ein wesentlicher Aspekt bei modernen Kraftfahrzeugen.In modern motor vehicles are increasingly tire air pressure monitoring systems used to detect the tire inflation pressure. It has shown, that many accidents, where a puncture was the cause, on a wrong Tire pressure are attributed. Therefore, a surveillance tire inflation pressure with regard to the safety of the vehicle occupants an essential aspect of modern motor vehicles.
Bei
sogenannten direkt messenden Reifenluftdrucküberwachungssystemen mit lediglich
einer Empfangsantenne, wie beispielsweise aus der
Aus
der
Daher ist es Aufgabe der Erfindung, ein einfaches Zuordnungsverfahren für Reifenmodule in Reifenluftdrucküberwachungssystemen von Kraftfahrzeugen bereitzustellen.Therefore It is an object of the invention, a simple assignment method for tire modules in tire air pressure monitoring systems of motor vehicles.
Diese Aufgabe wird erfindungsgemäß durch das Zuordnungsverfahren nach Anspruch 1 gelöst.These The object is achieved by the Allocation method according to claim 1 solved.
Weitere bevorzugte Ausführungsformen des erfindungsgemäßen Zuordnungsverfahrens ergeben sich aus den Unteransprüchen. Die Erfindung wir im Folgenden anhand von Figuren beschrieben.Further preferred embodiments the assignment method according to the invention emerge from the dependent claims. The invention will be described below with reference to figures.
Es zeigt.It shows.
In
Wie
bereits einleitend gesagt, benötigen
Reifenluftdrucküberwachungssysteme
mit einer Zentralantenne eine Information, an welcher Radposition sich
welches Reifenmodul
Das hier beschriebene Zuordnungsverfahren ist in der Lage, bei einem Reifenluftdrucküberwachungssystem mit nur einer Zentralantenne zwischen rotierenden Rädern und Ersatzrad zu unterscheiden und die Radposition bei der Reifendruckanzeige mit auszugeben.The assignment procedure described here is able to distinguish between a rotating tire and spare tire in a tire air pressure monitoring system with only one central antenna and to output the wheel position in the tire pressure display.
Hierzu
wird der sogenannte „Dopplereffekt" verwendet, welcher
folgendes Phänomen
beschreibt:
Bewegt sich ein Körper, der ein Signal mit der
Frequenz f0 abstrahlt, mit einer Geschwindigkeit
v auf einen zu ihm relativ stehenden Empfänger zu, dann ergibt sich (vom
Empfänger
aus gesehen) eine gemessene Frequenz f wie folgt:
- c:
- Ausbreitungsgeschwindigkeit des Signals, 3·108m/s
If a body radiating a signal of frequency f 0 is traveling at a speed v to a receiver which is relatively close to it, a measured frequency f results (as seen from the receiver) as follows:
- c:
- Propagation speed of the signal, 3 · 10 8 m / s
Entsprechend gilt für den sich entfernenden Körper: Similarly, for the departing body:
Im
Fahrzeug sind Empfänger
und Sender nicht auf einer Linie, daher müssen noch die Winkel zwischen
der Bewegungsrichtung des Empfängers und
der (realen) Ausbreitungsrichtung des Signals mit einbezogen werden.
Die geometrischen Verhältnisse
sind vereinfacht aus
Die
effektiven Geschwindigkeiten vi ergeben sich
damit zu (i = Radnummer):
Daraus folgt für die einzelnen Frequenzen fi: It follows for the individual frequencies f i :
Es ist also für jede Radposition eine vom Winkel und der Radgeschwindigkeit abhängige Frequenzverschiebung zu berechnen.It is for each wheel position is dependent on the angle and the wheel speed frequency shift to calculate.
Der Winkel ist aus der Fahrzeuggeometrie bestimmbar bzw. kann durch Messung des realen Signalausbreitungsweges bestimmt werden. Die Geschwindigkeit vrad ist die Umfangsgeschwindigkeit des Rades, die durch die ABS-Drehzahlsensoren erfasst werden kann.The angle can be determined from the vehicle geometry or can be determined by measuring the real signal propagation path. The speed v rad is the peripheral speed of the wheel that can be detected by the ABS speed sensors.
Durch
die Rotation des Rades ist die Geschwindigkeit sinusförmig moduliert,
so auch die Frequenzvariation (
- ω:
- Radwinkelgeschwindigkeit
- t:
- Zeit
- vx:
- Relativbewegung zwischen Sender im Rad und Empfänger im Fahrzeug
- rdyn:
- Dynamischer Abrollumfang des Rades
- ω:
- wheel angular
- t:
- Time
- vx :
- Relative movement between transmitter in the wheel and receiver in the vehicle
- r dyn :
- Dynamic rolling circumference of the wheel
Ein Problem bei der Erkennung der Modulation der Frequenzvariation kann sich jedoch ergeben, wenn das Reifenmodul nur auf Teilstücken einer Umdrehung sendet. Dann kann es sein, dass man im schlimmsten Fall gar keine Frequenzvariation beobachtet (Reifenmodul bewegt sich gerade senkrecht nach unten). Hier müsste man dann mit Maximalwerten in der Frequenzvariation arbeiten, die dem jeweiligen Reifenmodul zugeordnet werden.One Problem in detecting the modulation of the frequency variation can However, arise when the tire module only on sections of a Turn sends. Then it may be that in the worst case scenario no frequency variation observed (tire module is moving straight down). Here you would then with maximum values work in the frequency variation corresponding to the respective tire module be assigned.
Rechnerisch kommt man mit diesem Ansatz (winkelabhängig von αi und β) auf einen Frequenzhub fmax von ca. 100 Hz bei einer Senderfrequenz von 433 MHz. Detektiert man eine Variation in der Frequenz um diese fmax während ein Reifenmodul sendet, so muss es sich an einem rotierenden Rad befinden.Computationally one comes with this approach (angle-dependent of α i and β) on a frequency deviation f max of about 100 Hz at a transmitter frequency of 433 MHz. If a variation in frequency is detected by this f max while a tire module is transmitting, it must be on a rotating wheel.
Es gilt: Je stärker die maximale Variation in der Frequenz des Signals, desto „spitzer" der Winkel αi zwischen Reifenmodul und Empfänger. So kann man die Position bestimmen.The stronger the maximum variation in the frequency of the signal, the sharper the angle α i between the tire module and the receiver, so you can determine the position.
Sollte die Abstrahldauer des Reifenmoduls nicht lang genug sein um eine volle Radumdrehung zu gewährleisten, so empfiehlt es sich, Maximalwerte im Frequenzhub pro Reifenmodul zu speichern. Das Reifenmodul mit dem höchsten Maximalwert ist dann das mit dem spitzesten Winkel αi zum Empfänger.If the radiation duration of the tire module is not long enough to ensure a full wheel revolution, it is recommended to store maximum values in the frequency deviation per tire module. The tire module with the highest maximum value is then the one with the sharpest angle α i to the receiver.
Im Folgenden wird das erfindungsgemäße Verfahren im Detail beschrieben.in the The following is the method according to the invention described in detail.
Zuerst wird der Frequenzhub (Variation der Frequenz) eines empfangenen Signal jedes Reifenmoduls ermittelt. Anschließend werden die empfangenen Frequenzhübe jedes einzelnen Signals eines Reifenmoduls zu der jeweiligen Identifikationsnummer (ID) des Reifenmoduls abgespeichert. Aus den abgespeicherten einzelnen Frequenzhüben der Signale der Reifenmodule wird der maximale oder ein gemittelter Frequenzhub des jeweiligen Signals des Reifenmoduls gebildet. Anschließend werden die einzelnen Reifenmodule mit den maximalen oder den gemittelten Frequenzhüben den Winkeln αi zugeordnet, wobei das Reifenmodul mit dem höchsten maximalen Frequenzhub dem spitzesten Winkel zugeordnet wird. Hierdurch ist jedem Reifenmodul ein Winkel αi zugeordnet. Das Ersatzrad weist hierbei, da es nicht rotiert, den kleinsten Winkel αi auf. Im Fahrzeug ist abgelegt, welcher Winkel αi zu welcher Radposition gehört, wodurch eine eindeutige Zuordnung zwischen Reifenmodul und Radposition möglich ist.First, the frequency deviation (frequency variation) of a received signal of each tire module is determined. Subsequently, the received frequency strokes of each individual signal of a tire module are stored to the respective identification number (ID) of the tire module. From the stored individual frequency strokes of the signals of the tire modules, the maximum or an average frequency deviation of the respective signal of the tire module is formed. Subsequently, the individual tire modules with the maximum or the average frequency strokes are assigned to the angles α i , wherein the tire module with the highest maximum frequency deviation is assigned to the most acute angle. As a result, each tire module is assigned an angle α i . The spare wheel has, since it does not rotate, the smallest angle α i . In the vehicle is stored, which angle α i belongs to which wheel position, whereby a clear association between the tire module and wheel position is possible.
Wenn der Empfänger im Motorraum (vorn) untergebracht ist, dann sollte zumindest die Unterscheidung der Radposition vorn/hinten einfach sein, da die Relativbewegung zwischen Reifenmodul und Empfänger (entlang der Verbindungslinie zwischen Sensor und Empfänger) vorn klein und hinten groß ist.If the recipient in the engine compartment (front) is housed, then should at least the Distinction of the wheel position forward / back to be easy, since the Relative movement between tire module and receiver (along the connecting line between sensor and receiver) small at the front and big at the back.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510034958 DE102005034958A1 (en) | 2005-07-22 | 2005-07-22 | Method associating signals from tire monitoring modules, with individual wheels of vehicle including spare, evaluates doppler shift of signals received |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510034958 DE102005034958A1 (en) | 2005-07-22 | 2005-07-22 | Method associating signals from tire monitoring modules, with individual wheels of vehicle including spare, evaluates doppler shift of signals received |
Publications (1)
Publication Number | Publication Date |
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DE102005034958A1 true DE102005034958A1 (en) | 2007-01-25 |
Family
ID=37575754
Family Applications (1)
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DE200510034958 Withdrawn DE102005034958A1 (en) | 2005-07-22 | 2005-07-22 | Method associating signals from tire monitoring modules, with individual wheels of vehicle including spare, evaluates doppler shift of signals received |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014489A2 (en) * | 2007-07-09 | 2009-01-14 | Bridgeport S.R.L. | Vehicle tyre condition monitoring system with tyre position self-location |
CN104709011A (en) * | 2013-12-16 | 2015-06-17 | 通用汽车环球科技运作有限责任公司 | TPMS using RSSI and Doppler signature |
EP2217459A4 (en) * | 2007-11-30 | 2016-01-06 | Volvo Lastvagnar Ab | Method of identifying positions of wheel modules |
Citations (5)
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---|---|---|---|---|
DE19926616C2 (en) * | 1999-06-11 | 2001-05-23 | Continental Ag | Method for carrying out an assignment of tire pressure control devices of a tire pressure control system to the wheel positions of a motor vehicle |
DE19915999C2 (en) * | 1999-04-09 | 2001-09-27 | Continental Ag | Motor vehicle with tire pressure control system |
EP1238830A2 (en) * | 2001-03-07 | 2002-09-11 | Trw Inc. | Sytem and method for monitoring a condition of a vehicle tire |
US20030001735A1 (en) * | 2001-06-29 | 2003-01-02 | Johnson Controls Technology Company | Using signal strength to identify tire position |
US20040017290A1 (en) * | 2000-11-10 | 2004-01-29 | Michelin Recherche Et Technique S.A. & Cie. | System for monitoring the tires of a vehicle, comprising a device for automatic location of wheel transmitters |
-
2005
- 2005-07-22 DE DE200510034958 patent/DE102005034958A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19915999C2 (en) * | 1999-04-09 | 2001-09-27 | Continental Ag | Motor vehicle with tire pressure control system |
DE19926616C2 (en) * | 1999-06-11 | 2001-05-23 | Continental Ag | Method for carrying out an assignment of tire pressure control devices of a tire pressure control system to the wheel positions of a motor vehicle |
US20040017290A1 (en) * | 2000-11-10 | 2004-01-29 | Michelin Recherche Et Technique S.A. & Cie. | System for monitoring the tires of a vehicle, comprising a device for automatic location of wheel transmitters |
EP1238830A2 (en) * | 2001-03-07 | 2002-09-11 | Trw Inc. | Sytem and method for monitoring a condition of a vehicle tire |
US20030001735A1 (en) * | 2001-06-29 | 2003-01-02 | Johnson Controls Technology Company | Using signal strength to identify tire position |
Non-Patent Citations (3)
Title |
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BARTELS,OLIVER:Batterielose Transpondertechnik für elektronische Reifendruck- Kontrolle.In:ATZ,2002,Jahrgang 104,S.348-352 * |
BARTELS,OLIVER:Batterielose Transpondertechnik für elektronische Reifendruck- Kontrolle.In:ATZ,2002,Jahrgang 104,S.348-352; |
HERING,EKBERT,u.a.:Physik für Ingenieure.VDI-Verlag GmbH,Düsseldorf, 3.Aufl.,1989,S.709,710.ISBN 3-18-400916-5 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014489A2 (en) * | 2007-07-09 | 2009-01-14 | Bridgeport S.R.L. | Vehicle tyre condition monitoring system with tyre position self-location |
EP2014489A3 (en) * | 2007-07-09 | 2012-07-04 | Bridgeport S.R.L. | Vehicle tyre condition monitoring system with tyre position self-location |
EP2217459A4 (en) * | 2007-11-30 | 2016-01-06 | Volvo Lastvagnar Ab | Method of identifying positions of wheel modules |
CN104709011A (en) * | 2013-12-16 | 2015-06-17 | 通用汽车环球科技运作有限责任公司 | TPMS using RSSI and Doppler signature |
DE102014118119B4 (en) | 2013-12-16 | 2023-06-22 | Gm Global Technology Operations, Llc | Low-Line TMPS: Sensor mapping using RSSI and Doppler signatures with one or more ECUs |
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