EP0250469A1 - Procede de mesure a distance de la pression des pneumatiques de vehicules - Google Patents

Procede de mesure a distance de la pression des pneumatiques de vehicules

Info

Publication number
EP0250469A1
EP0250469A1 EP19860906756 EP86906756A EP0250469A1 EP 0250469 A1 EP0250469 A1 EP 0250469A1 EP 19860906756 EP19860906756 EP 19860906756 EP 86906756 A EP86906756 A EP 86906756A EP 0250469 A1 EP0250469 A1 EP 0250469A1
Authority
EP
European Patent Office
Prior art keywords
pressure
vehicle
coupling
coils
sensor
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Withdrawn
Application number
EP19860906756
Other languages
German (de)
English (en)
Inventor
Wilfried Schoeps
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0250469A1 publication Critical patent/EP0250469A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B60C23/0422—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 characterised by the type of signal transmission means
    • B60C23/0427—Near field transmission with inductive or capacitive coupling means
    • B60C23/0428—Near field transmission with inductive or capacitive coupling means using passive wheel mounted resonance circuits

Definitions

  • the invention relates to a method for the contactless measurement of the pressure of vehicle tires.
  • the measurement is carried out with a sensor on the wheel.
  • the sensor essentially consists of an electrical resonant circuit whose operating frequency is proportional to the pressure in the tire.
  • the working frequency is set by means of a pressure-sensitive membrane.
  • the pressure information is transmitted from the sensor to the vehicle without contact over a certain distance by means of an electromagnetic coupling to a coupling coil attached to the vehicle.
  • the vehicle contains suitable electronic devices for evaluating, displaying, alarming and regulating the air pressure.
  • the innovation consists in the fact that so far no methods are known which allow a non-contact, continuous measurement of the tire pressure, both during standstill and while driving, with the exception of the use of high-frequency transmitters built into the vehicle wheel.
  • the use of HF transmitters has the decisive disadvantage that several vehicles can interfere with one another, or that the system can interfere with other radio services or can be disturbed by them.
  • the invention has set itself the goal of being able to easily and inexpensively check the functional state of vehicle tires before or during the journey. So you can, for example Before landing an aircraft, check whether all wheels have the prescribed air pressure.
  • sensor A is attached to the wheel or an integrated part of the same. It is located at a certain distance in front of the coupling coil 3, which is firmly on
  • Vehicle is attached. This arrangement ensures a permanent transmission of information, regardless of the position or the operating mode (standstill / drive) of the wheel.
  • Fig. 2 is the electrical arrangement according to claim A and
  • Sensor A consists of an oscillating circuit
  • Coil 4a is in the upper mentioned distance from
  • Coupling coil 3 which is symbolized as the electromagnetic coupling k.
  • the sensor A is connected via the coupling k
  • Coupling coil 3 excited to a damped vibration.
  • Coupling coil The damped oscillation of the excited sensor is transferred to the amplifier 5 via the switch 2.
  • the frequency of the vibration is measured with the frequency meter 6 and displayed with a suitable display device 7.
  • the display is proportional to the tire pressure.
  • a frequency variable Vibration generator 1b generates a frequency that is close to the expected operating frequency of sensor A.
  • the frequency and the amplitude of the vibration generator 1b are amplified in the amplifier 5 and evaluated in the frequency meter 6. From the frequency meter
  • the vibration generator 1b is automatically readjusted until the frequency of the vibration generator 6 then corresponds to that of the sensor A.
  • Display 7 is displayed. The display is proportional to the tire pressure.
  • the vehicle wheel also contains an active one
  • Vibration generator 8 with a suitable auxiliary energy source 9 Vibration generator 8 with a suitable auxiliary energy source 9.
  • the information is transmitted via the coupling k to the coupling coil 3, amplified by the amplifier 5, with the frequency meter
  • Fig. 5 corresponds functionally to Fig. A with the addition that the
  • Auxiliary energy source 9 is replaced by a further coupling device 10, 11 with the coupling k2 and is fed from the vehicle.
  • the couplings kl and k2 can be used with a suitable one
  • the information about the tire pressure can be used not only for display purposes, but also for alarms when the pressure is too low or too high and for

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Le procédé permet de mesurer continuellement et à distance la pression des pneumatiques de véhicules, indépendamment du fait que le véhicule, ou ses roues, soient immobiles ou en mouvement. Il est applicable à toutes sortes de pneumatiques et à tous les types de véhicules routiers, sur rails ou les avions. A l'aide du procédé décrit, on peut obtenir à chaque instant des informations sur la pression correcte ou anormale des pneumatiques d'une manière simple et économique. Ceci constitue un point important de la sécurité avant la mise en service ou durant la marche du véhicule.
EP19860906756 1985-12-13 1986-12-08 Procede de mesure a distance de la pression des pneumatiques de vehicules Withdrawn EP0250469A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5306/85 1985-12-13
CH530685 1985-12-13

Publications (1)

Publication Number Publication Date
EP0250469A1 true EP0250469A1 (fr) 1988-01-07

Family

ID=4291381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860906756 Withdrawn EP0250469A1 (fr) 1985-12-13 1986-12-08 Procede de mesure a distance de la pression des pneumatiques de vehicules

Country Status (3)

Country Link
EP (1) EP0250469A1 (fr)
AU (1) AU6629886A (fr)
WO (1) WO1987003544A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609419B1 (en) 1999-02-11 2003-08-26 Emtop Limited Signal transmission in a tire pressure sensing system
JP5690340B2 (ja) 2010-08-09 2015-03-25 株式会社ブリヂストン タイヤ内圧測定システム

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274557A (en) * 1940-07-10 1942-02-24 Morgan Raymond Electric gauge
US4334428A (en) * 1978-05-04 1982-06-15 Fima Raoul G Apparatus for indicating parameters sensed on a rotatable wheel
DE2951139A1 (de) * 1979-12-19 1981-07-02 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur kontinuierlichen ueberwachung des luftdruckes in fahrzeugreifen
FR2485192A1 (fr) * 1980-06-19 1981-12-24 Telecommunications Sa Procede et dispositif pour mesurer la pression de pneumatiques notamment pour aeronefs
DE3029563C2 (de) * 1980-08-05 1990-11-15 Bayerische Motoren Werke AG, 8000 München Übertragungsverfahren für einen veränderlichen Meßwert für den Reifendruck von Fahrzeug-Rädern
EP0108176A1 (fr) * 1982-11-05 1984-05-16 Philip Elliot Galasko Détection d'une condition de sous-pression d'un pneumatique de véhicule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8703544A1 *

Also Published As

Publication number Publication date
WO1987003544A1 (fr) 1987-06-18
AU6629886A (en) 1987-06-30

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