DE3741700A1 - Measuring system for motor vehicles - Google Patents

Measuring system for motor vehicles

Info

Publication number
DE3741700A1
DE3741700A1 DE19873741700 DE3741700A DE3741700A1 DE 3741700 A1 DE3741700 A1 DE 3741700A1 DE 19873741700 DE19873741700 DE 19873741700 DE 3741700 A DE3741700 A DE 3741700A DE 3741700 A1 DE3741700 A1 DE 3741700A1
Authority
DE
Germany
Prior art keywords
measuring system
pressure
film
tire
sensitive film
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Withdrawn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
DE19873741700
Other languages
German (de)
Inventor
Erich Dr Ing Dr Zabler
Erich Dipl Ing Rubel
Herbert Dr Ing Dr Schramm
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19873741700 priority Critical patent/DE3741700A1/en
Priority to JP31028388A priority patent/JPH01195331A/en
Publication of DE3741700A1 publication Critical patent/DE3741700A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
    • 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
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
    • G01G19/035—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion using electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
    • G01G19/12—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles having electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/13—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing having piezoelectric or piezoresistive properties

Abstract

A measuring system is proposed for determining the contact force between tyre and track. For this purpose, a piezoelectric film (5) is used, which is wound around the tyre (1). The signal pickup is achieved via a wire (9), and the signals are processed by an electronic evaluation unit (19). The measuring system is intended for application in motor vehicles. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf ein Meßsystem für Kraftfahrzeuge nach der Gattung des Hauptanspruchs.The invention relates to a measuring system for motor vehicles the genus of the main claim.

Ein derartiges Meßsystem ist bekannt (DE-OS 32 18 806). Bei dieser bekannten Bauart wird die Radlast mittels Gewichtsmesser gemessen und an einem Prüfstand registriert.Such a measuring system is known (DE-OS 32 18 806). At this Known design, the wheel load is measured using a weight meter and registered on a test bench.

Ein solches Meßsystem hat den Nachteil, daß es nur stationär anwend­ bar ist und daß die ermittelten Werte den tatsächlichen Fahrbedin­ gungen keine Rechnung tragen.Such a measuring system has the disadvantage that it is only used stationary bar and that the determined values correspond to the actual driving conditions not take into account.

Vorteile der ErfindungAdvantages of the invention

Das eingangs genannte Meßsystem mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß es auch während der Fahrt Meßwerte liefert und daß außer dem modifizierten Rad-Rei­ fen keine zusätzlichen Abtaster wie Räder oder Gestänge notwendig sind.The measuring system mentioned at the beginning with the characteristic features the main claim has the advantage that it also during provides measured values for the journey and that in addition to the modified Rad-Rei no additional sensors such as wheels or rods are necessary are.

Des weiteren ist es von Vorteil, daß das Meßsystem nur wenig Masse hat und daß diese Masse am Radreifen weitgehend gleichmäßig verteilt werden kann, so daß keine Unwucht entsteht.Furthermore, it is advantageous that the measuring system has little mass and that this mass is largely evenly distributed on the wheel tire can be so that there is no imbalance.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­ stellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Fig. 1 das an einem Reifen angebrachte Meßsystem und Fig. 2 eine Abwicklung vom Reifen und von der Piezzo-Folie.An embodiment of the invention is shown in the drawing and Darge explained in more detail in the following description. In the drawings: Figure 1 shows the tire mounted on a measuring system, and Figure 2 is a development of the tire and of the piezo foil...

Beschreibung des AusführungsbeispielesDescription of the embodiment

Ein Kraftfahrzeug-Reifen 1 sitzt auf einer Felge 2, die ein Reifen­ füllventil 3 trägt. Der Reifen 1 hat eine Lauffläche 4, auf der eine druckempfindliche Folie, insbesondere eine Piezzo-Folie 5 angeordnet ist. Die Folie 5 ist in einen Schutzmantel 6 gehüllt, welche die Folie 5 vor Abrieb und Feuchtigkeit schützt. Sie kann aber auch um einen geringen Betrag in die Reifenoberfläche eingelassen sein, dann kann der Schutzmantel 6 entfallen.A motor vehicle tire 1 sits on a rim 2 , which carries a tire fill valve 3 . The tire 1 has a tread 4 on which a pressure-sensitive film, in particular a piezo film 5 , is arranged. The film 5 is wrapped in a protective jacket 6 , which protects the film 5 from abrasion and moisture. However, it can also be embedded in the tire surface by a small amount, in which case the protective jacket 6 can be omitted.

Die Piezzo-Folie 5 hat zwei Signalabgriffe 7 und 8 (Fig. 2), die über einen Kabelstrang 9, der radial am Reifen 1 entlang im wesent­ lichen in Richtung zu einer Radachse 10 hin verläuft, und dort zu einer am Reifen angeordneten elektronischen Koppelstelle 11 führt. Von dort werden die Signale über einen Drehübertrager in der Form einer magnetischen Koppelung 18 an eine fahrzeugfeste Auswertestelle 19 gegeben.The piezo film 5 has two signal taps 7 and 8 ( FIG. 2), which runs via a cable harness 9 which runs radially along the tire 1 in the direction of a wheel axis 10 and there to an electronic coupling point arranged on the tire 11 leads. From there, the signals are given via a rotary transformer in the form of a magnetic coupling 18 to an evaluation point 19 fixed to the vehicle.

Die Fig. 2 zeigt eine Abwicklung 12 des Reifens 1. Die Länge der Reifen-Abwicklung 12 ist auf eine Abwicklung 13 der Piezzo-Folie 5 projeziert. Es ist zu erkennen, daß die Piezzo-Folie 5 nach ihrer Montage von ihrem Aufbau her ein Band mit durchweg gleicher Breite ist. Die Folie 5 ist zu ihren beiden Enden 14 und 15 hin zwecks Überlappung verjüngt. Die Verjüngungsteile 16 und 17 werden bei der Montage der Folie 5 entlang der Lauffläche nebeneinander gelegt. Die Folie 5 muß aber keinen geschlossenen Kreis bilden. Die Signalab­ griffe 7 und 8 sind an der jeweils breitesten Stelle angeordnet, so daß der Abgriff an diesen breitesten Stellen erfolgt. Fig. 2 shows a processing 12 of the tire 1. The length of the tire development 12 is projected onto a development 13 of the piezo film 5 . It can be seen that the piezo film 5 is a ribbon with its same width throughout after assembly. The film 5 is tapered towards its two ends 14 and 15 for the purpose of overlapping. The tapered parts 16 and 17 are placed next to each other during the assembly of the film 5 along the tread. The film 5 does not have to form a closed circle. The Signalab handles 7 and 8 are arranged at the widest point, so that the tap is made at these widest points.

Mit einem solchen Meßsystem kann die Kontaktkraft zwischen dem Rei­ fen 1 und der Fahrbahn während der Fahrt ermittelt werden.With such a measuring system, the contact force between the fen 1 and the road surface can be determined while driving.

Die Piezzo-Folie 5 liefert bei einer mechanischen Beanspruchung, hier also bei einer Druckbelastung, ein beanspruchungsproportionales Spannungs- oder Ladungssignal. Auf diese Weise wird hier die dynami­ sche Kontaktkraft während des Rollvorganges des Reifens 1 ermittelt. Die über den Kabelstrang 9 zu der elektronischen Auswertestelle 19 gelangenden Meßsignale werden dort elektronisch bearbeitet und zu einer beliebigen Anzeige- oder Speicherstelle am Fahrzeug weiterge­ leitet.The piezo film 5 delivers a stress-proportional voltage or charge signal in the event of mechanical stress, that is to say here under a pressure load. In this way, the dynamic contact force cal during the rolling process of the tire 1 is determined. The measuring signals coming through the cable harness 9 to the electronic evaluation point 19 are processed electronically there and forwarded to any display or storage location on the vehicle.

Claims (8)

1. Meßsystem für Kraftfahrzeuge zur Ermittlung der Kontaktkraft zwi­ schen Reifen und Fahrbahn, dadurch gekennzeichnet, daß der Reifen (1) entlang seiner Lauffläche mit einer druckempfindlichen Folie (5) versehen ist, die Meßsignale erzeugt, die über einen Drehübertrager vom drehenden Rad an eine fahrzeugeigene elektronische Auswerte­ stelle (11) abgebbar sind.1. Measuring system for motor vehicles for determining the contact force between the tire and roadway, characterized in that the tire ( 1 ) is provided along its tread with a pressure-sensitive film ( 5 ), which generates measurement signals via a rotary transducer from the rotating wheel to one vehicle-specific electronic evaluation point ( 11 ) can be issued. 2. Meßsystem nach Anspruch 1, dadurch gekennzeichnet, daß die druck­ empfindliche Folie (5) eine Piezo-Folie ist.2. Measuring system according to claim 1, characterized in that the pressure-sensitive film ( 5 ) is a piezo film. 3. Meßsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Meßsignal von der druckempfindlichen Folie (5) über einen im wesent­ lichen radial am Reifen (1) entlang verlaufenden Kabelstrang (9) zu einer Koppelstelle (11) geführt ist.3. Measuring system according to claim 1 or 2, characterized in that the measurement signal from the pressure-sensitive film ( 5 ) via a substantially union radially on the tire ( 1 ) along cable harness ( 9 ) is guided to a coupling point ( 11 ). 4. Meßsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeich­ net, daß die druckempfindliche Folie (5) ein Band durchweg gleicher Breite ist.4. Measuring system according to one of claims 1 to 3, characterized in that the pressure-sensitive film ( 5 ) is a tape throughout the same width. 5. Meßsystem nach einem der Anspruch 3, dadurch gekennzeichnet, daß die Folie (5) sich zu ihren beiden Enden hin überlappt und dort ver­ jüngt ist, wobei die Verjüngungsteile entlang der Lauffläche neben­ einander gelegt sind und der Signalabgriff an der breitesten Stelle der Folie erfolgt. 5. Measuring system according to one of claim 3, characterized in that the film ( 5 ) overlaps to its two ends and is tapered there, the tapering parts are placed along the tread side by side and the signal tap at the widest point of the film he follows. 6. Meßsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeich­ net, daß die druckempfindliche Folie (5) von einem Schutzmantel (6) umgeben ist.6. Measuring system according to one of claims 1 to 5, characterized in that the pressure-sensitive film ( 5 ) is surrounded by a protective jacket ( 6 ). 7. Meßsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeich­ net, daß die druckempfindliche Folie (5) in die Reifenoberfläche eingelassen ist.7. Measuring system according to one of claims 1 to 6, characterized in that the pressure-sensitive film ( 5 ) is embedded in the tire surface. 8. Meßsystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeich­ net, daß zur Ubertragung der Meßsignale vom Rad zum Fahrzeug ein Drehübertrager vorzugsweise eine magnetische Kopplung (18) verwendet ist.8. Measuring system according to one of claims 1 to 7, characterized in that a rotary transducer, preferably a magnetic coupling ( 18 ) is used to transmit the measurement signals from the wheel to the vehicle.
DE19873741700 1987-12-09 1987-12-09 Measuring system for motor vehicles Withdrawn DE3741700A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873741700 DE3741700A1 (en) 1987-12-09 1987-12-09 Measuring system for motor vehicles
JP31028388A JPH01195331A (en) 1987-12-09 1988-12-09 Measuring apparatus for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873741700 DE3741700A1 (en) 1987-12-09 1987-12-09 Measuring system for motor vehicles

Publications (1)

Publication Number Publication Date
DE3741700A1 true DE3741700A1 (en) 1989-06-22

Family

ID=6342198

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873741700 Withdrawn DE3741700A1 (en) 1987-12-09 1987-12-09 Measuring system for motor vehicles

Country Status (2)

Country Link
JP (1) JPH01195331A (en)
DE (1) DE3741700A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105298C1 (en) * 2001-02-02 2002-08-14 Fag Automobiltechnik Ag Wheel bearing unit for measuring the contact forces between tires and road
WO2004065145A1 (en) * 2003-01-17 2004-08-05 Vasasensor Ab Sensor arrangement
US7406876B2 (en) 2003-01-17 2008-08-05 Vasensor Ab Sensor arrangement
DE10329700B4 (en) * 2003-07-02 2016-12-15 Continental Automotive Gmbh Method and device for determining the tire inflation pressure and the wheel load of a vehicle tire
AT525992A4 (en) * 2022-11-30 2023-10-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be placed against one another under the influence of force
AT526049B1 (en) * 2022-11-30 2023-11-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be positioned against one another under the influence of force

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105298C1 (en) * 2001-02-02 2002-08-14 Fag Automobiltechnik Ag Wheel bearing unit for measuring the contact forces between tires and road
WO2004065145A1 (en) * 2003-01-17 2004-08-05 Vasasensor Ab Sensor arrangement
US7406876B2 (en) 2003-01-17 2008-08-05 Vasensor Ab Sensor arrangement
CN100515807C (en) * 2003-01-17 2009-07-22 Vasa传感器股份公司 Sensor arrangement
DE10329700B4 (en) * 2003-07-02 2016-12-15 Continental Automotive Gmbh Method and device for determining the tire inflation pressure and the wheel load of a vehicle tire
AT525992A4 (en) * 2022-11-30 2023-10-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be placed against one another under the influence of force
AT525992B1 (en) * 2022-11-30 2023-10-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be placed against one another under the influence of force
AT526049B1 (en) * 2022-11-30 2023-11-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be positioned against one another under the influence of force
AT526049A4 (en) * 2022-11-30 2023-11-15 Net Automation Gmbh Device for detecting the pressure forces between two bodies that can be positioned against one another under the influence of force

Also Published As

Publication number Publication date
JPH01195331A (en) 1989-08-07

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Legal Events

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8139 Disposal/non-payment of the annual fee