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1. EP2474429 - TIRE-STATE DETECTION DEVICE

Office
European Patent Office
Application Number 10813546
Application Date 18.05.2010
Publication Number 2474429
Publication Date 11.07.2012
Publication Kind B1
IPC
B60C 23/04
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
23Devices 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
02Signalling devices actuated by tyre pressure
04mounted on the wheel or tyre
G01L 17/00
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
17Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
CPC
B60C 23/0452
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
23Devices 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
02Signalling devices actuated by tyre pressure
04mounted on the wheel or tyre
0408transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
0422characterised by the type of signal transmission means
0433Radio signals
0447Wheel or tyre mounted circuits
0452Antenna structure, control or arrangement
B60C 23/0494
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
23Devices 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
02Signalling devices actuated by tyre pressure
04mounted on the wheel or tyre
0491Constructional details of means for attaching the control device
0494Valve stem attachments positioned inside the tyre chamber
B60C 23/0498
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
23Devices 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
02Signalling devices actuated by tyre pressure
04mounted on the wheel or tyre
0491Constructional details of means for attaching the control device
0498for rim attachments
H01Q 1/2241
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
12Supports; Mounting means
22by structural association with other equipment or articles
2208associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
2241used in or for vehicle tyres
H01Q 7/00
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
7Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Applicants YOKOHAMA RUBBER CO LTD
Inventors NAKATANI KOJI
Designated States
Priority Data 2009201574 01.09.2009 JP
Title
(DE) REIFENSTATUSERKENNUNGSVORRICHTUNG
(EN) TIRE-STATE DETECTION DEVICE
(FR) DISPOSITIF DE DÉTECTION D'ÉTAT DE PNEU
Abstract
(EN)
Disclosed is a tire-state detection device which can not only acquire good antenna characteristics even if the shape of the rim to which the tire-state detection device is to be fitted changes, but can also be produced at lower costs and be mass produced. The tire-state detection device is provided with: a sensor (410) for detecting a predetermined physical state of a tire; an antenna (450) which has a predetermined resonant frequency; a detection circuit for transmitting information relating to the detection results of the sensor (410) as radio waves from the antenna (450); and a case (100) which houses the sensor (410), antenna (450), and detection circuit, and through which radio waves can pass, wherein said case (100) can be fitted to the rim (3) of a tire. The tire-state detection device is provided with a planar conductor (310) which is fit, in a state electrically insulated from the antenna (450), at a position away from the antenna (450) by a predetermined distance so as to form an interface between the antenna (450) and rim (3) when the case (100) is fit to the rim (3), and is set to a potential equivalent to the reference potential of the detection circuit.

(FR)
L'invention porte sur un dispositif de détection d'état de pneu, lequel dispositif peut non seulement acquérir de bonnes caractéristiques d'antenne même si la forme de la jante sur laquelle doit être disposé le dispositif de détection d'état de pneu change, mais peut également être produit à des coûts plus faibles et être produit en masse. Le dispositif de détection d'état de pneu comporte : un capteur (410) pour détecter un état physique prédéterminé d'un pneu ; une antenne (450) qui a une fréquence de résonance prédéterminée ; un circuit de détection pour transmettre une information concernant les résultats de détection du capteur (410) sous la forme d'ondes de radio à partir de l'antenne (450) ; et une enceinte (100) qui renferme le capteur (410), l'antenne (450) et un circuit de détection, et à travers laquelle des ondes radio peuvent passer, ladite enceinte (100) pouvant être disposée sur la jante (3) d'un pneu. Le dispositif de détection d'état de pneu comporte un conducteur plan (310) qui est disposé, dans un état électriquement isolé de l'antenne (450), dans une position éloignée de l'antenne (450) d'une distance prédéterminée de façon à former une interface entre l'antenne (450) et la jante (3) lorsque l'enceinte (100) est disposée sur la jante (3), et qui est mis à un potentiel équivalent au potentiel de référence du circuit de détection.