DE3411584A1 - Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions - Google Patents

Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions

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Publication number
DE3411584A1
DE3411584A1 DE19843411584 DE3411584A DE3411584A1 DE 3411584 A1 DE3411584 A1 DE 3411584A1 DE 19843411584 DE19843411584 DE 19843411584 DE 3411584 A DE3411584 A DE 3411584A DE 3411584 A1 DE3411584 A1 DE 3411584A1
Authority
DE
Germany
Prior art keywords
measuring
measuring device
film
operating conditions
under different
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Withdrawn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
DE19843411584
Other languages
German (de)
Inventor
Hans 6800 Mannheim Steitz
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
Priority to DE19843411584 priority Critical patent/DE3411584A1/en
Publication of DE3411584A1 publication Critical patent/DE3411584A1/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L17/00Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
    • G01L17/005Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies using a sensor contacting the exterior surface, e.g. for measuring deformation

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tires In General (AREA)

Abstract

Published without abstract.

Description

PatentanmeldungPatent application

Meßgerät zum Messen der Aufstellkraftverteilung von Fahrzeugreifen aller Art. unter verschiedenen Betriebsbedingungen. Bei'der Beurteilung von Fahrzeugreifen ist ein Kriterium ° die Verteilung der Aufstell kraft über die gesamte Kontakt flache mit der Fahrbahn. Diese Kraftverteilung wird im folgenden mit "Kontaktprofil" bezeichnet. Das Kontaktprofil eines Reifens * ändert sich mit verschiedenen äußeren Parametern wie Belastung, -Luftdruck, Sturz, Vorspur, Geradeausfahrt·oder Kurvenfahrt, Beschaffenheit der Straßenoberflache etc. Darüberhinaus ist. es auch interessant dieses Kontaktprofil nicht nur- beim stehenden Reifen zu erfassen, sondern auch beim rotierenden Reifenmit variabler Geschwindigkeit und auch beim Beschleunigen und Abbremsen eines Fahrzeuges. Da die auf dem Markt angebotenen Geräte nur beim stehenden Reifen und nur in einem sehr groben Raster Messungen ermöglichen, wurde η a. c h einer geeigneten.Lösung gesucht, die eine kontinuierliche und lückeη 1öse Messung der Meßkraftverteilung ermöglicht. Als Meßaufnehmer dient z.B. ein Piezo-elektrischer Druckaufnehmer (1.1), der in einer Aufnahmeplatte (1.2) montiert ist. Der Meßkraftaufnehmer bildet- mit der Meßplattenoberfläche eine Ebene und steht in einem Fenster (1.3), so daß im Bereich der Meßwertaufnahme eine Kraftent.koppelung zuMeasuring device for measuring the erection force distribution of Vehicle tires of all kinds under different operating conditions. When assessing vehicle tires, one criterion is ° the distribution of the installation force over the entire contact flat with the roadway. This force distribution will be used in the following "Contact Profile" referred to. The contact profile of a tire * changes with various external parameters such as load, air pressure, camber, toe-in, straight-ahead driving or cornering, Condition of the road surface, etc. In addition, is. It is also interesting not only for this contact profile to capture stationary tires, but also with rotating tires variable speed and also when accelerating and braking a vehicle. As the ones offered on the market Devices only allow measurements with stationary tires and only in a very coarse grid, η a. c h a suitable.solution wanted a continuous and intermittent measurement of the Measuring force distribution enables. A piezoelectric pressure transducer (1.1), for example, is used as the measuring transducer Mounting plate (1.2) is mounted. The measuring force transducer forms with the surface of the measuring plate is a plane and is in a window (1.3), so that a force decoupling in the area of the measured value recording

den umliegenden Flächen erfolgt. Diese Aufnahmeplatte wird im Bereich der Aufstellfläche nach einem vorwählbaren Bewegungsschema z.B. mäanderförmig bewegt und die dabei auftretenden analogen Ausgangssignale auf ein Schreibgerät, einen Computer oder Speicheroszillographen mit Frequenzanalysator ausgegeben und nach den verschiedenen Parametern ausgeweitet. Zur Ausschaltung der Haftreibung zwischen der Meßplatte und dem Reifen wird ,zwischen Meßp'latte und Reifen eine Zu/ischenfolie (1.4) gelegt, die auf Grund ihrer Elastizität die unterschiedlichen Auf stel ldrüc.ke in den "verschiebbaren Meßkraftaufnehmer einleitet. Um die Messung'.auch, bei rotierendem Reifen durchführen zu können ist es er f Order ] ich ,·· daß die Zw ischenf öl ie als endloses Band (1.4.1) ausgebildet ist und über Umlenkrollen (1.6) läuft.the surrounding areas. This mounting plate is in Area of the installation area according to a preselectable movement pattern e.g. moved in a meandering shape and the resulting analog Output signals output to a writing instrument, computer or storage oscilloscope with frequency analyzer and after the various parameters. To eliminate the static friction between the measuring plate and the tire, between Measuring plate and tire an insert sheet (1.4) placed on the Due to their elasticity, the different pressures in initiates the "movable measuring force transducer. In order to carry out the measurement even when the tire is rotating can it is he f order] I, ·· that the dichotomy is infinite Belt (1.4.1) is formed and runs over pulleys (1.6).

■ - 2 -■ - 2 -

EPO-COPY §A EPO-COPY §A

341158A341158A

)abei ω-ird die Aufnahmeplatte (1.2.1) mit dem Druckaufnehmer (1.1.1) nach einem voru/ählbaren Bewegungsschema z.B. mäanderförmig .in '" Schritten (t) über die Breite (B) bewegt. Da nicht nur das" Kont-a_ktprpfil axif einer idealen Oberfläche von. Bedeutung ist, können auf die" Zu/ischenfolie (1.4)üachbildungen verschiedener Straßenoberflachen aufgebracht und damit das Kontaktprofil unter. ") ab with ω-Ω the mounting plate (1.2.1) with the pressure transducer (1.1.1) according to a preselectable movement scheme e.g. meandering .in '" Steps (t) across the width (B). Since not only the "Kont-a_ktprpfil axif an ideal surface of. Meaning is can on the "Zu / ischen liner (1.4) simulations of various road surfaces applied and thus the contact profile under. "

realistischen BedinöiJjDae_n_e_rfaßt \i/erden. ■ ■realistic conditions. ■ ■

- ,"■ -■ ' ,.-- -■-"'"""'. " ' - \ Als Antriebe können für die Auflageplatte vorzugsweise-, "■ - ■ ' , .-- - ■ -"'"""'."' - \ The preferred drives for the support plate are

Elektromotoren oder Hydraulik-Zylinder eingesetzt werden. ; Electric motors or hydraulic cylinders are used. ;

*>■ EPO ·■-- C OPY*> ■ EPO · ■ - C OPY

t-—- SisJ- t - SisJ

Claims (1)

PatentansprücheClaims Meßgerät zur Ermittlung des Kontaktprofils von Fahrzeugreifen, dadurch gekennzeichnet, daß ein oder mehrere in eine ebene oder gekrümmte Fläche eingebaute Druckaufnehmer kontinuierlich die Kontaktfläche abtasten und kraft-proportionale Ausgangs-Signale abgeben, die in geeigneten Verarbeitungsgeräten für die Beurteilung des Systems Straße-Reifen aufbereitet werden.Measuring device for determining the contact profile of vehicle tires, characterized in that one or more pressure sensors built into a flat or curved surface are continuous feel the contact surface and force-proportional Emit output signals in suitable processing equipment prepared for the assessment of the road-tire system. Meßgerät nach Anspruch 1 dadurch gekennzeichnet, daß zur Reduzierung der Reibung und zur Kraftübertragung zu Reifen und Meßfläche eine Folie eingelegt wird.Measuring device according to claim 1, characterized in that for Reduction of friction and power transmission to tires and a film is inserted into the measuring surface. Meßgerät nach Anspruch 1+2 dadurch gekennzeichnet, daß diese Folie.als endloses Band ausgebildet ist, das vom Reifen angetrieben über Umlenkrollen läuft. .:Measuring device according to claim 1 + 2, characterized in that this film is designed as an endless belt that is dated Tire driven over pulleys runs. .: Meßgerät nach· Anspruch 1,2 und 3 dadurch gekennzeichnet, daß die Antriebsleistung über die Folie in eine Bremseinrichtung e.ingeleitet-U/ird, so -daß es möglich ist, die Veränderung des Kontaktprofils beim Bremsen bezw. Beschleunigen zu messen. Dabei wird über einen zweiten Druckaufnehmer die Schubkraft gemes.sen.Measuring device according to claims 1, 2 and 3, characterized in that that the drive power via the film in a braking device e.introduced-U / ird, so -that it is possible to Change in the contact profile when braking or. Accelerate to eat. The Thrust measured. Meßgerät nach Anspruch 1-4 dadurch gekennzeichnet, daß auf der Folie Nachbildungen von verschiedenen Straßenoberflächen aufgebracht werden,- so daß das Kontaktprofil auch unter diesen Bedingungen gemessen werden kann.Measuring device according to claims 1-4, characterized in that reproductions of various road surfaces on the slide - so that the contact profile can also be measured under these conditions. EPO - COPYEPO - COPY
DE19843411584 1984-03-29 1984-03-29 Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions Withdrawn DE3411584A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843411584 DE3411584A1 (en) 1984-03-29 1984-03-29 Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843411584 DE3411584A1 (en) 1984-03-29 1984-03-29 Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions

Publications (1)

Publication Number Publication Date
DE3411584A1 true DE3411584A1 (en) 1985-10-03

Family

ID=6231962

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843411584 Withdrawn DE3411584A1 (en) 1984-03-29 1984-03-29 Measuring instrument for measuring the contact pressure distribution of vehicle tyres of all types under different operating conditions

Country Status (1)

Country Link
DE (1) DE3411584A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088321A (en) * 1989-11-02 1992-02-18 Sumitomo Rubber Industries, Ltd. Apparatus and method for observing the ground contact patch of a tire
US5092166A (en) * 1990-02-01 1992-03-03 Sumitomo Rubber Industries, Ltd. Apparatus for determining shape of contact patch and contact pressure of tires
EP0695935A1 (en) * 1994-06-09 1996-02-07 PIRELLI COORDINAMENTO PNEUMATICI S.p.A. Device for detecting the distribution of a specific pressure in the groundcontacting area of a motor-vehicle tyre, and detection method carried out thereby

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088321A (en) * 1989-11-02 1992-02-18 Sumitomo Rubber Industries, Ltd. Apparatus and method for observing the ground contact patch of a tire
US5092166A (en) * 1990-02-01 1992-03-03 Sumitomo Rubber Industries, Ltd. Apparatus for determining shape of contact patch and contact pressure of tires
EP0695935A1 (en) * 1994-06-09 1996-02-07 PIRELLI COORDINAMENTO PNEUMATICI S.p.A. Device for detecting the distribution of a specific pressure in the groundcontacting area of a motor-vehicle tyre, and detection method carried out thereby
US5641900A (en) * 1994-06-09 1997-06-24 Pirelli Coordinamento Pneumatici S.P.A. Device for analysis of tire ground contact pressure

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Legal Events

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8139 Disposal/non-payment of the annual fee