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WO1997017218A1 - Dispositif de controle du kilometrage sur pneumatiques et procede de fonctionnement - Google Patents

Dispositif de controle du kilometrage sur pneumatiques et procede de fonctionnement Download PDF

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Publication number
WO1997017218A1
WO1997017218A1 PCT/GB1996/002683 GB9602683W WO9717218A1 WO 1997017218 A1 WO1997017218 A1 WO 1997017218A1 GB 9602683 W GB9602683 W GB 9602683W WO 9717218 A1 WO9717218 A1 WO 9717218A1
Authority
WO
WIPO (PCT)
Prior art keywords
tyre
output signal
periphery
processing means
signal processing
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
PCT/GB1996/002683
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English (en)
Inventor
John Michael Jessop
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1997017218A1 publication Critical patent/WO1997017218A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
    • G01C22/02—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers by conversion into electric waveforms and subsequent integration, e.g. using tachometer generator

Definitions

  • the present invention relates to a method and apparatus for monitoring tyre mileage and relates particularly, but not exclusively, to an apparatus and method for monitoring tyre mileage of heavy goods vehicles.
  • Mileage sensors are known which are connected to the gear box of a vehicle and provide an indication of the mileage travelled by the vehicle.
  • Such conventional mileage detectors suffer from the disadvantage, however, that an indication is only provided of the mileage travelled by the vehicle as a whole, and no indication is given of the mileage travelled by individual tyres . This causes particular problems when individual wheels of a heavy goods vehicles are replaced, such that the various wheels of the vehicle have different mileages.
  • a tyre mileage monitoring device comprising: - a mechanical transducer mounted in use adjacent the periphery of a tyre of a vehicle, for providing an electrical output signal representative of mechanical forces acting on the periphery of the tyre during rotation thereof; and signal processing means for receiving the output signal of the mechanical transducer and providing an output signal representative of changes in the mechanical forces acting on the periphery of the tyre as a result of the periphery of the tyre adjacent the transducer coming into contact with the ground.
  • the mechanical transducer may comprise a piezoelectric crystal for generating a voltage dependent upon mechanical forces acting on the crystal.
  • the mechanical transducer may be mounted to an internal peripheral surface of the tyre.
  • the mechanical transducer may be embedded within the tyre.
  • the mechanical transducer may be mounted to a side wall of the tyre.
  • the signal processing means comprises a pulse generator for generating a series of electrical pulses, each of which represents a change in the mechanical forces acting on the periphery of the tyre, as a result of the periphery of the tyre adjacent the transducer coming into contact with the ground.
  • the signal processing means may further comprise a counter for counting said electrical pulses.
  • the signal processing means can be constructed in a particularly simple and convenient manner for digital processing by, for example a micro-processor.
  • the pulse generator may comprise a CMOS circuit.
  • the signal processing means may further comprise an analogue / digital converter, and said pulse counter may comprise a shift register.
  • the signal processing means further comprises a micro-processor for processing the output of pulse counter and collating data relating to the number of revolutions rotated by the tyre.
  • the signal processing means may provide an output representative of a number of revolutions rotated by the tyre.
  • Data may be periodically collated by the micro-processor, each collation period corresponding to a plurality of revolutions of the tyre.
  • the output signal of the signal processing means may include an identification code unique to the tyre.
  • the device may further comprise radio frequency transmitter means for transmitting the output signal of the signal processing means to a remote station.
  • This provides the advantage of enabling data to be automatically down loaded and analysed at the remote station, such as a heavy goods vehicle depot.
  • the device may further comprise radio frequency receiver means for enabling the device to be interrogated from a remote station.
  • transmission of the output signal of the signal processing means is activated by interrogation of the device via the radio frequency receiver means from the remote station.
  • the device may further comprise pressure sensor means for providing an electrical output signal representative of the pneumatic pressure in the tyre, wherein the output signal of the pressure sensor means is supplied to the signal processing means.
  • the pressure sensor means may include a" piezoelectric element .
  • the device may further comprise temperature sensor means for providing an electrical output signal representative of the temperature of the tyre, wherein the output signal of the temperature sensor means is supplied to the signal processing means.
  • the device as defined above may be included in single transponder unit adapted to be mounted in use adjacent the periphery of the tyre.
  • This provides the advantage of a particularly compact construction, and enables the transponder unit to be conveniently mounted to the tyre during manufacture.
  • a system for monitoring mileage of individual tyres of a vehicle comprising a plurality of devices as defined above, and display means for receiving the output signal of the signal processing means of each said device and displaying mileage travelled by each tyre of the vehicle.
  • the display means may be a computer.
  • the display means may be remote from the vehicle.
  • a method of monitoring mileage of a vehicle tyre comprising: providing a mechanical transducer adjacent the periphery of a tyre for producing an electrical output representative of mechanical forces acting on the periphery of the tyre adjacent the transducer during rotation thereof; and detecting changes in the mechanical forces acting on the periphery of the tyre as a result of the periphery of the tyre adjacent the transducer coming into contact with the ground; and providing an electrical output signal representative of the number of revolutions rotated by the tyre.
  • the step of detecting changes in the mechanical forces acting on the periphery of the tyre may comprise generating electrical pulses representative of the changes in mechanical forces, and counting said pulses.
  • the method may further comprise the step of periodically collating the output signal representative of the number of revolutions stated, wherein a period of collation may correspond to several such revolutions.
  • the method further comprises providing in the output signal an identification code unique to the tyre .
  • the method may further comprise the step of transmitting said output signal via a radio frequency transmitter to a remote station.
  • the method may further comprise a step of initiating transmission of said output signal from a remote station via a radio frequency receiver.
  • the method may further comprise the step of monitoring the pressure in said tyre.
  • the method may further comprise the step of monitoring the temperature of said tyre.
  • Figure 1 is a cross-sectional view of a tyre incorporating a transponder unit embodying an aspect of the present invention.
  • FIG. 2 is a detailed schematic view of the transponder unit of Figure 1.
  • the rubber body of a tyre 1 is shown in cross-section in bold lines, the tyre 1 having side walls 2 and tread region 3.
  • the external shape taken up by the side walls of the tyre 1 when in contact with the ground (not shown) is indicated by dotted lines 4.
  • a transponder unit 5 is mounted at a central region of an internal peripheral wall 6 of the tyre 1 by any suitable means during " manufacture of the tyre, such as fixing by means of adhesive.
  • the transponder may be embedded within the peripheral wall 6 or mounted to one of the side walls 2 internally thereof.
  • the transponder 5 comprises a mechanical detector 7 for producing an electrical output signal representative of mechanical forces acting on the transponder unit 5 when the tyre 1 is rotating.
  • the sensor 7 comprises a piezoelectric crystal of dimensions of the order of 2mm x 5mm mounted within an enclosure and having a pair of wires (not shown) attached thereto, such that when the piezoelectric crystal is subjected to forces, a voltage is generated across the two wires which is dependent upon (e.g. generally proportional to) the forces acting on the piezoelectric crystal.
  • the output of sensor 7 is connected to a CMOS pulse generating circuit 8 which generates a series of electrical pulses, each of which indicates a change in mechanical forces acting on the sensor 7 as a result of the periphery of the tyre 1 adjacent thereto coming into contact with the ground during rotation of the tyre 1.
  • CMOS pulse generating circuit 8 By using a CMOS circuit 8, power consumption of the circuit 8 is minimised.
  • the electrical output of sensor 7 has two constituent parts, a first part representing forces acting on the sensor 7 due to the random but continuous vibrations within the structure of the tyre 1 as the tyre rotates, and a second part which results from a large mechanical impulse each time the periphery of the tyre 1 in the vicinity of the transponder 5 contacts the ground.
  • This mechanical impulse produces a significant voltage pulse which is distinguishable by means of circuit 8 from the general background noise level, such that circuit 8 produces a stream of pulses from its output, each pulse representing a single revolution of tyre 1.
  • circuit 8 produces a stream of pulses from its output, each pulse representing a single revolution of tyre 1.
  • the random but continuous vibrations within the structure of tyre 1 as tyre 1 rotates produces a continuous background voltage noise level which can be used to provide energy to power suitable drive circuit-ry (not shown) for sensor 7, for example by means of charging a suitable capacitor arrangement.
  • the output signal provided by circuit 8 is supplied to an analogue / digital converter 9, which is in turn connected to a micro-processor 10.
  • the micro-processor 10 has memory 11 which includes a CMOS shift register and a counter.
  • the memory 11 of micro-processor 10 also includes an identity code unique to the tyre 1, the function of which will be described below.
  • a pressure sensor 14 comprises a piezoelectric resistance element of dimensions of the order of 3mm x 3mm, rigidly mounted within an enclosure.
  • the pressure sensor 14 is a constant current device and is a 4 terminal device with resistors in a bridge arrangement, such that changes in ambient pressure within the tyre 1 cause corresponding changes in resistance of the piezoelectric element.
  • the constant current is fed through two of the terminals of sensor 14 and the voltage difference across the other two terminals of the sensor 14 are fed into two inputs (not shown) of a differential amplifier 15, the output of which is fed to analogue / digital converter 9.
  • the pressure sensor 14 is calibrated at ambient pressure such that when the sensor 14 is subjected to an external pressure, the piezoelectric element exhibits a change in resistance which is detected at the output.
  • a temperature sensor 16 comprises a resistance bridge in which the temperature co-efficient of resistance is accurately known at room temperature and is used to detect changes in temperature of the body of tyre 1 and / or of the air within the tyre 1 adjacent to the transponder 5.
  • the output of sensor 16 is fed via amplifier 17 to the analogue / digital converter 9.
  • the transponder unit 5 also includes a coil antenna 18 for transmission and receipt of radio frequency signals to and from a remote station (not shown) , the antenna 18 being connected to the microprocessor 10 via input / output circuitry 19.
  • the micro-processor 10 is powered by means of a battery 19, and the timing pulses of micro-processor 10 are generated by a crystal oscillator 13.
  • the voltage and / or current output provided by one or more of sensors 7, 14, 16 may be used to drive the analogue / digital converter 9 and memory 11.
  • a transponder 5 is mounted to each tyre 1 of a heavy goods vehicle (not shown) and a remote station (not shown) communicating with transponder unit 5 by means of radio frequency signals through antenna 18 is mounted at a suitable road side location, such as the gate of a heavy goods vehicle depot.
  • the remote station is designed to communicate with the transponder unit 5 over a distance of the order to 1.5 metres to 3 metres. This enables the remote station to communicate with the transponder 5 at low frequency, which generally does not necessitate special permits.
  • the memory 11 of micro-processor 10 is re-set by means of a radio frequency signal from the remote station through antenna 18 to the micro-processor 10.
  • the sensors 7, 14, 16 then begin to produce output signals representative of the number of revolutions, pressure, and temperature respectively of the tyre 1 subsequently to the vehicle leaving the depot.
  • These signals pass via circuits 8, 15, 17 respectively to analogue / digital converter 9 and are stored in shift register (not shown) of memory 11 of micro ⁇ processor 10.
  • the shift register When the shift register is full, or at a suitable interval such as 1000 revolutions of the tyre 1, the number of counts stored in the shift register is transferred to the micro-processor 10 for integration and summation such that collated data on the mileage, pressure and temperature of the tyre 1 is stored in memory 11 of the micro-processor 10.
  • an interrogation signal is transmitted from the remote station to the transponder 5 via antenna 18.
  • This causes battery 12 to energise transponder 5 to transmit data stored in the memory 11 of the micro-processor 10 via antenna 18 back to the remote station, where it may be stored in a computer or otherwise displayed.
  • the data transmitted from memory 11 also includes an identity code unique to each transponder 5 to avoid confusion between signals transmitted from the different tyres 1 of the heavy goods vehicle. In this way, the micro-processor 10 remains dormant until activated by the remote station when the vehicle returns to the depot, thus saving power of battery 12.
  • the apparatus of Figures 1 and 2 provides a convenient system for monitoring mileage, pressure and temperature of the tyres of a heavy goods vehicle.
  • the system is still useful for monitoring tyre conditions even if the tyre is removed from a vehicle and mounted to another vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un dispositif de contrôle du kilométrage sur pneumatiques, qui comprend une unité de répondeur (5) montée en position adjacente par rapport à la périphérie du pneumatique (1) d'un véhicule. L'unité de répondeur (5) fournit un signal électrique de sortie qui traduit les forces mécaniques agissant sur le pneumatique (1) en rotation. Un dispositif de traitement des signaux reçoit le signal de sortie envoyé par l'unité de répondeur (5) et fournit à son tour un signal de sortie qui traduit les modification subies par les forces mécaniques agissant à la périphérie du pneumatique (1) au contact entre la partie de la périphérie adjacente à l'unité de répondeur (5) et le sol.
PCT/GB1996/002683 1995-11-07 1996-11-01 Dispositif de controle du kilometrage sur pneumatiques et procede de fonctionnement Ceased WO1997017218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9522808.6 1995-11-07
GB9522808A GB2307044A (en) 1995-11-07 1995-11-07 Tyre mileage monitoring apparatus and method

Publications (1)

Publication Number Publication Date
WO1997017218A1 true WO1997017218A1 (fr) 1997-05-15

Family

ID=10783529

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002683 Ceased WO1997017218A1 (fr) 1995-11-07 1996-11-01 Dispositif de controle du kilometrage sur pneumatiques et procede de fonctionnement

Country Status (2)

Country Link
GB (1) GB2307044A (fr)
WO (1) WO1997017218A1 (fr)

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US7549327B2 (en) 2001-02-16 2009-06-23 Automotive Technologies International, Inc. Tire-mounted energy generator and monitor
US7760080B2 (en) 2000-09-08 2010-07-20 Automotive Technologies International, Inc. Tire monitoring with passive and active modes
US7693626B2 (en) 2000-09-08 2010-04-06 Automotive Technologies International, Inc. Vehicular tire monitoring based on sensed acceleration
GB9619181D0 (en) * 1996-09-13 1996-10-23 Sumitomo Rubber Ind Sensor for a pneumatic tyre
FR2764241B1 (fr) * 1997-06-10 1999-08-20 Dassault Electronique Surveillance d'un pneumatique par mesure d'acceleration
EP0887211B1 (fr) * 1997-06-23 2003-01-02 COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN - MICHELIN & CIE Système de surveillance de pneumatiques
GB9726594D0 (en) * 1997-12-17 1998-02-18 Sumitomo Rubber Ind Sensor for a pneumatic tyre
US6438193B1 (en) 1998-07-10 2002-08-20 Wen H. Ko Self-powered tire revolution counter
US6309494B1 (en) * 1998-12-04 2001-10-30 Bridgestone/Firestone Research, Inc. Method of attaching sensitive electronic equipment to the inner surface of a tire
WO2001080327A1 (fr) 2000-04-18 2001-10-25 Pirelli Pneumatici S.P.A. Generateur piezo-electrique pour detecteurs situes a l'interieur de pneus de vehicule
GB2406170B (en) * 2000-09-08 2005-05-04 Automotive Tech Int Vehicle wireless sensing and communication system
EP1227018B1 (fr) * 2001-01-29 2005-10-19 The Goodyear Tire & Rubber Company Procédé de détection de l'état d'un pneu
US7256505B2 (en) * 2003-03-05 2007-08-14 Microstrain, Inc. Shaft mounted energy harvesting for wireless sensor operation and data transmission
US7081693B2 (en) * 2002-03-07 2006-07-25 Microstrain, Inc. Energy harvesting for wireless sensor operation and data transmission
US7429801B2 (en) 2002-05-10 2008-09-30 Michelin Richerche Et Technique S.A. System and method for generating electric power from a rotating tire's mechanical energy
US6725713B2 (en) * 2002-05-10 2004-04-27 Michelin & Recherche Et Technique S.A. System for generating electric power from a rotating tire's mechanical energy using reinforced piezoelectric materials
US7096727B2 (en) 2002-05-10 2006-08-29 Michelin Recherche Et Technique S.A. System and method for generating electric power from a rotating tire's mechanical energy
US6807853B2 (en) 2002-05-10 2004-10-26 Michelin Recherche Et Technique S.A. System and method for generating electric power from a rotating tire's mechanical energy using piezoelectric fiber composites
WO2004042325A1 (fr) * 2002-10-30 2004-05-21 Stemco Llc Compteur d'essieu kilometrique electronique
WO2004056591A1 (fr) * 2002-12-20 2004-07-08 Pirelli Pneumatici S.P.A. Compte-tours pour pneumatiques
US6847126B2 (en) * 2003-02-25 2005-01-25 Michelin Recherche Et Technique S.A. System and method for harvesting electric power from a rotating tire's static electricity
US7123134B2 (en) 2003-08-08 2006-10-17 Set Industries Corporation Methods and apparatuses for providing strobe effects for wheel illumination systems and wheel lighting systems
US7377676B2 (en) 2003-08-08 2008-05-27 Set Industries Corporation Methods and apparatuses for illuminating wheel surfaces
US7126233B2 (en) * 2003-09-15 2006-10-24 Set Industries Corporation Methods and apparatuses for generating electrical power in a rotating reference frame
FI117364B (fi) 2004-05-21 2006-09-15 Valtion Teknillinen Energiantuotantojärjestely
US7138911B2 (en) 2004-08-04 2006-11-21 Michelin Recherche Et Technique S.A. Power conversion from piezoelectric source with multi-stage storage
US20090151829A1 (en) * 2007-12-18 2009-06-18 Robert Edward Lionetti Tire with integral sensor mount
CN106052711B (zh) * 2016-07-29 2019-02-19 万通智控科技股份有限公司 轮胎行驶里程检测装置及方法
DE102017209534A1 (de) * 2017-06-07 2018-12-13 Continental Reifen Deutschland Gmbh Reifen mit einem Sensor

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DE4402136A1 (de) * 1994-01-26 1995-07-27 Telefunken Microelectron System zur Bestimmung der Betriebsparamter von Fahrzeugreifen
WO1995022467A1 (fr) * 1994-02-22 1995-08-24 Computer Methods Corporation Repondeur actif a circuit integre et detecteur transmettant des donnees parametriques a un pneu de vehicule

Also Published As

Publication number Publication date
GB2307044A (en) 1997-05-14
GB9522808D0 (en) 1996-01-10

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