DE10300778A1 - Tire pressure monitoring device for a motor vehicle - Google Patents

Tire pressure monitoring device for a motor vehicle

Info

Publication number
DE10300778A1
DE10300778A1 DE2003100778 DE10300778A DE10300778A1 DE 10300778 A1 DE10300778 A1 DE 10300778A1 DE 2003100778 DE2003100778 DE 2003100778 DE 10300778 A DE10300778 A DE 10300778A DE 10300778 A1 DE10300778 A1 DE 10300778A1
Authority
DE
Germany
Prior art keywords
control device
air pressure
tire air
pressure control
characterized
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.)
Ceased
Application number
DE2003100778
Other languages
German (de)
Inventor
Michael Fromm
Volker Pretzlaff
Rainer Vens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leopold Kostal GmbH and Co KG
Original Assignee
Leopold Kostal GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Leopold Kostal GmbH and Co KG filed Critical Leopold Kostal GmbH and Co KG
Priority to DE2003100778 priority Critical patent/DE10300778A1/en
Publication of DE10300778A1 publication Critical patent/DE10300778A1/en
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00Devices 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, of tanks; Tyre cooling arrangements
    • B60C23/02Signalling devices actuated by tyre pressure
    • B60C23/04Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408Signalling 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00Devices 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, of tanks; Tyre cooling arrangements
    • B60C23/02Signalling devices actuated by tyre pressure
    • B60C23/04Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408Signalling 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
    • B60C23/0422Signalling 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 characterised by the type of signal transmission means
    • B60C23/0433Radio signals
    • B60C23/0447Wheel or tyre mounted circuits
    • B60C23/045Means for detecting electromagnetic field changes being not part of the signal transmission per se, e.g. strength, direction, propagation or masking
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME 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
    • G07C9/00Individual registration on entry or exit
    • G07C9/00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309Electronically 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
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME 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
    • G07C9/00Individual registration on entry or exit
    • G07C9/00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME 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
    • G07C2209/00Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

Abstract

The invention relates to a tire air pressure control device for a motor vehicle with a plurality of wheels each equipped with a pneumatic tire, comprising at least one control unit provided with an HF transceiver and to each pneumatic tire monitored and coupled to a pressure measurement module and for bidirectional communication with the central control unit intended RF transmitters / receivers. DOLLAR A Compared to the prior art, this device has the advantage that the position of both the wheels of the vehicle and other components provided with HF transceivers, such as those of a portable ID transmitter of a keyless entry or driving authorization control device, is determined is possible at any time. DOLLAR A This is achieved in that the RF transmit / receive devices are additionally provided with means which enable the distance between two RF transmit / receive devices to be determined.

Description

  • The invention relates to a tire air pressure control device for a Motor vehicle with several wheels each equipped with a pneumatic tire, comprising at least one provided with an RF transceiver control unit as well as monitored at everyone Pneumatic tires available, coupled with a pressure measuring module and for provided bidirectional communication with the central control unit RF transmitting / receiving devices.
  • Find such tire pressure monitoring systems more frequently, also required by law, use in motor vehicles. Various types of systems are used in today's vehicles: Some of the sensors in the individual wheels are caused by inductive fields deliberately awakened. Each wheel is assigned an inductive transmitter which usually is arranged in the wheel arch or its vicinity and the NF receiver of the controls the corresponding wheel. The transmission of the actual The pressure is then measured using a high-frequency carrier. This RF signal is then either over individual, the respective wheels assigned and e.g. in the wheel arches receive existing RF receivers, or they are received by means of at least one RF receiver arranged in the vehicle for further processing in a control unit. No other systems for cost reasons on the specific control of a wheel by low-frequency, inductive signal for the purpose of pressure value transmission. Send instead these tire pressure sensors the information only due to pressure fluctuations, or by means of acceleration sensors or time-controlled by radio to one or more recipients in the vehicle.
  • The DE 100 14 076 A1 discloses a tire air pressure control device according to the preamble of the main claim. In this device, both the components assigned to the wheels and a central control unit are each provided with an HF transceiver. This allows the monitored pneumatic tires to be interrogated in a targeted manner, so that a possible malfunction of other radio-based systems, such as an access or flag authorization control system, can be reduced. A fixed assignment of the radio information to a wheel position is only given as long as the wheel remains in its respective position, ie after a tire change outside of workshops, the assignment may no longer exist. Here, the new local assignment can only be achieved through training processes in workshops or through other additional measures.
  • Today's driving and access authorization control systems (e.g. KeylessGo) consist of different function blocks; so there is usually a bidirectional data exchange between the vehicle and an ID transmitter, which with the help of low-frequency and / or high-frequency signals is carried out. With high quality Systems is equipment of the vehicle with several low-frequency inductive transmitter coils common. About these Coils, which are attached to certain positions in the vehicle the LF signal is transmitted, which in turn is received by an ID transmitter becomes. Dependent on the reception field strength at the location of the ID transmitter or the strength the received signal in the ID transmitter can then be relative or even absolute position to the vehicle. This Position determination in the ID transmitter can then turn the vehicle be communicated through which certain functions are controlled.
  • For example, determining whether the ID transmitter is inside or outside the vehicle, used to decide whether to enable the engine to start is granted or not. Furthermore e.g. the opening of a certain door made dependent on the position of the ID transmitter relative to the vehicle be (right or left).
  • The tire air pressure control device according to the present invention compared to the prior art Advantage of determining the position of a respective wheel in relation to one to allow any point in time so that too after swapping the wheels it is always ensured that the correct allocation of the air pressure value to the respective wheel position given is. Furthermore allows the device also determines the position of other RF transmitters / receivers provided components such as a portable ID transmitter keyless Access or driving authorization control device.
  • This is achieved in that the RF transceivers additionally are provided with means for determining the distance between Allow two RF transmitters / receivers.
  • By determining the distances between the RF transmitters / receivers of the wheels at least one off-center and asymmetrical in the vehicle positioned RF transceiver or by determination several such distances different RF transmitters / receivers is a position determination of the respective wheel relative to the vehicle. In addition, a distance measurement of the wheels among themselves. The same is true the position of an ID transmitter relative to the vehicle possible by its respective distance to at least three in their position with respect to the vehicle known RF transmitters / receivers is determined.
  • Another advantage of the device according to the invention over the prior art is, moreover, improved protection against via attempts at manipulation from the outside, for example a driver being determined to stop by an incorrect display of a tire pressure loss caused by theft from outside the vehicle.
  • The distance measurement is carried out in the device according to the invention, for example, by determining a signal transit time. The signal transit time can be determined, for example, by a method that includes a comparison of the modulation variables of a modulated carrier wave, as described in FIG DE 198 39 896 C2 to which express reference is hereby made.
  • The invention is illustrated below of the embodiment shown schematically in the drawing explained in more detail.
  • The central control unit Z1 and optional further control units Z2, ... are located, as are the four wheels VL, VR, HL, HR with respect to the vehicle 1 at known positions. In a Cartesian coordinate system, the origin (0,0,0) of which can be determined, for example, at the location of the control unit Z1, the wheel positions should be as (x1, y1, z1), (x2, y2, z2), (x3, y3, z3 ) and (x4, y4, z4). To determine which wheel is at which position, it can be addressed by radio and its distance from at least one of the control units can be determined. Since the distances of the wheel positions from the control units are different, the assignment sought must be determined. In order to have a further position to increase the accuracy in addition to the position of the central control device Z1, it is not absolutely necessary to use a second autonomous vehicle-side RF transceiver, instead a transceiver with at least 2 antennas can be used in diversity mode become.
  • For determining the position of an ID transmitter belonging to a keyless access authorization system 2 it is necessary to carry out a distance measurement to an unknown point (x, y, z) from at least three known positions (so-called fixed points) in order to be able to clearly determine its absolute position. With the position of the four wheels and the at least one central control device Z1, five fixed points are already available, so that a location can be determined by means of distance measurements. For this purpose, the trigonometric relationships between the individual points and the measured distances are used, or vector relationships (see also the principle of operation of the GPS system). In any case, the unknown position is determined by an equation system using the determined distances and the known positions of the at least three fixed points, each further measurement of a further known point naturally improving the accuracy. The measurement becomes more precise the further the relative distance between the individual known fixed points is compared to the distance to the unknown point, since it is helpful here to achieve the greatest possible angle difference between the individual measurements.
  • Since the corner points of the body are the most distant points on a vehicle, the wheel positions fulfill this requirement in an almost ideal way. The wheels are each equipped with sensor electronics belonging to the tire air pressure control system and an HF transmission / reception device, which offers the possibility of bidirectional communication. In addition, they each have a device for measuring the distances to other RF transmitters / receivers. If a distance measurement is now carried out from all 4 wheels to an ID transmitter located in the unknown position (x, y, z), the respectively determined distances L1, L2, L3 and L4 between the wheel concerned and the ID transmitter can 2 a central unit Z1 are transmitted (for example also by radio). The distances are expressed in the coordinates of the known wheel positions and the unknown ID transmitter position: L1 = √ (x - X1) ² + (y - y1) ² + (z - z1) ² L2 = √ (x - X2) ² + (y - y2) ² + (z - z2) ² L3 = √ (X - X3) ² + (y - y3) ² + (z - z3) ² L4 = √ (x - X4) ² + (y - y4) ² + (z - z4) ²
  • This 4 distance information can then provide a clear statement about the position (x, y, z) of the ID transmitter 2 be made. The central control unit Z1 can include both the functionalities of the tire air pressure control device and that of the keyless access authorization control device.
  • An application of the position determination of the ID transmitter can of course also differentiating the position between indoor and outdoor of the vehicle. However, it can also occur when one approaches User / carrier of the ID transmitter whose direction is recognized by the vehicle, and depending on only the correspondingly selected door is opened in this direction, e.g. the driver's door or the trunk.
  • Any other controls depending the position of the ID transmitter, or the direction of approach or removal of the ID transmitter from the vehicle are conceivable.
  • The possibility of the position of the wheels Determining the vehicle also opens up applications in the context of an anti-theft alarm system in that manipulations on the wheels, such as the unauthorized removal of the same from the vehicle, are registered and can be used for a corresponding display or for triggering an alarm.

Claims (6)

  1. Tire air pressure control device for a motor vehicle with a plurality of wheels each equipped with a pneumatic tire, comprising at least one control unit provided with an HF transmitter / receiver device, and HF transmitters present on each monitored pneumatic tire and coupled to a pressure measurement module and provided for bidirectional communication with the central control unit / Receiving devices, characterized in that the HF transmitting / receiving devices are additionally provided with means which enable the distance between two HF transmitting / receiving devices to be determined.
  2. Tire air pressure control device according to claim 1, characterized in that the HF transmitters / receivers of the tire air pressure control device also for communication with other components of a motor vehicle assigned, keyless Access authorization control device existing RF transmission / reception devices are provided.
  3. Tire air pressure control device according to claim 2, characterized in that as Components of the keyless drive assigned to the motor vehicle Access authorization control device at least one portable ID transmitter and a control unit arranged in the vehicle are available are.
  4. Tire air pressure control device according to claim 2 or 3, characterized in that a common RF transceiver for the tire air pressure control device as well as the keyless Access authorization control device is provided.
  5. Tire pressure monitoring device according to one of the Expectations 1 to 4, characterized in that the means for determination the distance between two RF transmitters / receivers comprise a device for determining a signal transit time.
  6. Tire air pressure control device according to claim 5, characterized in that the Device for determining a signal transit time means for comparison of the modulation variables of a modulated carrier wave.
DE2003100778 2003-01-11 2003-01-11 Tire pressure monitoring device for a motor vehicle Ceased DE10300778A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2003100778 DE10300778A1 (en) 2003-01-11 2003-01-11 Tire pressure monitoring device for a motor vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003100778 DE10300778A1 (en) 2003-01-11 2003-01-11 Tire pressure monitoring device for a motor vehicle
PCT/EP2004/000097 WO2004062948A1 (en) 2003-01-11 2004-01-09 Tyre pressure monitoring device for a motor vehicle

Publications (1)

Publication Number Publication Date
DE10300778A1 true DE10300778A1 (en) 2004-07-22

Family

ID=32519841

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2003100778 Ceased DE10300778A1 (en) 2003-01-11 2003-01-11 Tire pressure monitoring device for a motor vehicle

Country Status (2)

Country Link
DE (1) DE10300778A1 (en)
WO (1) WO2004062948A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017206361A1 (en) * 2017-04-13 2018-10-18 Continental Automotive Gmbh Access system and access control method for a vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791488A1 (en) * 1995-09-01 1997-08-27 Fast Air, S.L. Method and system for measuring and adjusting pressure of tyres
DE19720123A1 (en) * 1997-01-17 1998-07-23 Doduco Gmbh Method and device for transmitting telecontrol commands and measurement data to one or more actuators or monitoring devices in an automobile
DE10014076A1 (en) * 2000-03-22 2001-10-04 Nolex Ag St Moritz Tire Air Pressure Indicator
DE10012113A1 (en) * 2000-03-13 2001-10-04 Siemens Ag Data transmission and/or distance measurement between base unit and mobile key unit of access authorization monitoring system involves modulating carrier signal with identification signal
DE10032936A1 (en) * 2000-07-06 2002-02-07 Siemens Ag Car security system has two antennas improves code unit location and security
EP1211104A2 (en) * 2000-11-29 2002-06-05 Trw Inc. Vehicle communication for tire sensor initiation and vehicle keyless entry via a shared resource
DE10203624A1 (en) * 2001-01-31 2002-08-01 Lear Corp System and method for joint monitoring of a vehicle's tire pressure, remote keyless entry and vehicle immobilization

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816775A1 (en) * 2000-11-10 2002-05-17 Michelin Soc Tech Vehicle wheel tyre monitor system comprises first and second radio reception chain defining axis, and comparator determining phase relationships with result processing position relative to antenna

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791488A1 (en) * 1995-09-01 1997-08-27 Fast Air, S.L. Method and system for measuring and adjusting pressure of tyres
DE19720123A1 (en) * 1997-01-17 1998-07-23 Doduco Gmbh Method and device for transmitting telecontrol commands and measurement data to one or more actuators or monitoring devices in an automobile
DE10012113A1 (en) * 2000-03-13 2001-10-04 Siemens Ag Data transmission and/or distance measurement between base unit and mobile key unit of access authorization monitoring system involves modulating carrier signal with identification signal
DE10014076A1 (en) * 2000-03-22 2001-10-04 Nolex Ag St Moritz Tire Air Pressure Indicator
DE10032936A1 (en) * 2000-07-06 2002-02-07 Siemens Ag Car security system has two antennas improves code unit location and security
EP1211104A2 (en) * 2000-11-29 2002-06-05 Trw Inc. Vehicle communication for tire sensor initiation and vehicle keyless entry via a shared resource
DE10203624A1 (en) * 2001-01-31 2002-08-01 Lear Corp System and method for joint monitoring of a vehicle's tire pressure, remote keyless entry and vehicle immobilization

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DUVENHAGE,Fanie: Schlüsselloser Zugang und Reifendruckmessung mit nur einem Mikrocontroller. In: Elektronik Informationen, Nr.11,2002,S.82-84 *
DUVENHAGE,Fanie: Schlüsselloser Zugang und Reifendruckmessung mit nur einem Mikrocontroller. In: Elektronik Informationen, Nr.11,2002,S.82-84;

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017206361A1 (en) * 2017-04-13 2018-10-18 Continental Automotive Gmbh Access system and access control method for a vehicle

Also Published As

Publication number Publication date
WO2004062948A1 (en) 2004-07-29

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Legal Events

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
R084 Declaration of willingness to licence
R084 Declaration of willingness to licence

Effective date: 20141011

R002 Refusal decision in examination/registration proceedings
R003 Refusal decision now final