EP-4737139-A1 - TIRE INCLUDING ELECTRONIC DEVICE, AND INFORMATION COLLECTION SYSTEM FOR VEHICLE TIRE

EP4737139A1EP 4737139 A1EP4737139 A1EP 4737139A1EP-4737139-A1

Abstract

The present invention relates to an information collection system for a vehicle tire and, more specifically, to an information collection system for a vehicle tire, which may wirelessly collect information from a tire. The present invention provides the information collection system for a vehicle tire, the information collection system comprising: a tire internal installed device(200) installed inside a tire(100) and comprising a sensor module(210) for collecting information of the tire and a transmission module(220) for transmitting the information collected from the sensor module(210); and a reception unit(300) for receiving a signal from a transmission unit(220) of the tire internal installed device(200), wherein a transmission frequency of the transmission module(220) is set 1.2 to 2 times higher than a frequency being measured by the reception unit(300).

Inventors

So, Soon-hong
Lee, Sunmi

Assignees

HANKOOK TIRE & TECHNOLOGY CO., LTD

Dates

Publication Date: 20260506
Application Date: 20240627

Claims (16)

A tire including an electronic device, comprising: an electronic device provided inside a tire; and a receiver provided on the outside of the tire, wherein the electronic device comprises a sensor module to collect tire information and a transmission module to transmit collected information from the sensor module, wherein the transmission frequency of the transmission module is designed such that the reception frequency of the receiver becomes a target receiving frequency, wherein the transmission frequency is designed to be greater than the target receiving frequency.
A tire including an electronic device of claim 1, the transmission frequency is designed by applying a tire radio frequency constant(TRFC) derived by varying one or more combinations of the dielectric constant, compound composition, thickness, and number of layers of structures positioned in a straight line between the electronic device and the receiver.
A tire including an electronic device of claim 2, the tire radio frequency constant(TRFC) is derived by applying one or more variables from a sidewall compound, a sidewall thickness, a carcass cord material, a carcass cord compound, a thickness of the carcass cord, a number of layers of the carcass cord, a compound of the bead filler, a thickness of the bead filler, a compound of the rim cushion, a thickness of the rim cushion, a compound of the inner liner, and a thickness of the inner liner.
A tire including an electronic device of claim 2, the tire radio frequency constant(TRFC) is derived by including a correction coefficient of the object surrounding the sensor and a sensor correction coefficient.
A tire including an electronic device of claim 2, the transmission frequency is designed as multiplied value of the product of the target receiving frequency and the derived tire radio frequency constant.
A tire including an electronic device of claim 1, the transmission frequency of the transmission module is set to be 1.2 to 2 times higher than the receiving frequency of the receiver.
A tire including an electronic device of claim 1, the electronic device is installed on the inner side corresponding to the tread portion of the tire, and the receiver is formed on the tire upward on the ground surface.
A tire including an electronic device of claim 1, the electronic device is installed on the inner side corresponding to both sidewall portions of the tire.
A tire including an electronic device of claim 7 or claim 8, a recognized range of a signal transmitted from the transmission module of the electronic device to the receiver is 1 mm to 1500 mm.
A tire including an electronic device of claim 8, the electronic device is installed in the sidewall portion between the bead wire end(a) at 40 mm and the second belt end(b) at the sidewall.
A tire including an electronic device of claim 1, the sensor module of the electronic device includes one or more sensors selected from a temperature sensor for measuring the temperature inside the tire, an acceleration sensor for measuring the acceleration motion of the tire, a gyro sensor for detecting the angular velocity of the tire, and a pressure sensor for measuring the pressure inside the tire.
A tire including an electronic device of claim 11, an electronic device further includes a power supply inside the tire.
A tire including an electronic device of claim 11, the electronic device further includes a wireless charging module to charge power from an external magnetic field.
A tire including an electronic device of claim 1, the electronic device has a first point where the bead wire and bead wire rubber meet, a second point where at the end of the bead filler, and a third point where at the end of the carcass and belt, the electronic device is positioned between the first point and the second point or between the second point and the third point, the electronic device is designed with a transmission frequency that varies as a radio frequency constant of the tire.
A tire including an electronic device of claim 14, when the electronic device is positioned between the first point and the second point, the electronic device is positioned at a point corresponding to 10 to 80 % of the length from the first point to the second point.
A tire including an electronic device of claim 14, when the electronic device is positioned between the second point and the third point, the electronic device is positioned at a point corresponding to 15 to 95 % of the length from the second point to the third point.

Description

[TECHNICAL FIELD] The present invention relates to a tire including an electronic device and an information collection system for vehicle tires capable of wirelessly collecting information from the tire, wherein the electronic device ensures accurate information transmission by matching the target receiving frequency with the actual receiving frequency. [BACKGROUND ART] With the recent increase in technological development for connected vehicles and autonomous vehicles, RFID tires, electronic tires, and intelligent tires, which attach or embed electronic devices within the tire, are being developed and sold. These intelligent tires are designed to measure tire-related information, process the measured data, and deliver the information to the user. Various wireless transmission methods are used to enable this information delivery. An intelligent tire monitoring system is a technology that enhances vehicle safety by equipping tires with chips or sensors to monitor tire condition and then relaying this tire status information to the driver in real time. This intelligent tire monitoring system communicates with various safety devices in the vehicle, intended for the safety of the driver and passengers, providing tire monitoring data to these various safety devices. Furthermore, tires equipped with RFID tags contain a chip storing various tire history information and an antenna for wireless communication with a reader. This chip stores unique tire information such as the manufacturing date, manufacturer, and product number, as well as the entire logistics information from tire production to sale, which is stored and updated. Information from the reader is stored and updated in the chip via the antenna, and information stored in the chip is transmitted to the reader via the antenna. Hereinafter, related prior art documents are described, and identification symbols in the prior art documents are unrelated to the present invention. Korean Patent No. 10-1500213 'Intelligent Tire System' is a bearing assembly configured to wrap around the wheel rim; and a sensor module configured to constantly sense the inner surface of the tire contacting the ground, installed to rotate relative to the wheel rim by the bearing assembly. a sensor module configured to constantly sense the inner surface of the tire contacting the ground by being installed to rotate relative to the wheel rim via the bearing assembly; wherein a light source is installed on the side of the sensor module; and configured to illuminate the inner surface of the tire contacting the ground via the light source. Korean Registered Patent No. 10-1435409 'RFID Tag for Tires' relates to an RFID tag for tires that prevents damage or unreadability of the tire mounted RFID tag due to internal/external interference during tire operation, and maintains tire information attached to the tire without the RFID tag detaching until the end of the tire's life. The RFID tag comprises a substrate elongated in the longitudinal direction, an RFID chip and antenna installed on the upper surface of the substrate, and an attachment portion arranged on the lower surface of the substrate for attachment to the inner wall surface of the tire, wherein the attachment portion is located only on a portion of the rear surface area of the RFID tag. However, the technologies of Patent No. 10-1500213 and Patent No. 10-1435409 had the problem of not being able to easily adjust the distance between transmission and reception. Meanwhile, electronic devices installed in intelligent tires are designed with electronic chips and antennas according to the desired frequency and recognition distance of each consumer, and can acquire information transmitted at various frequencies depending on the circuit design of the receiving end. Typically, the transmission frequency considers the dielectric constant of air; however, since air has a dielectric constant practically equal to 1, it is generally designed so that there is no difference between the transmission and reception frequencies. However, depending on the installation location of the electronic device, the compound, tire structure, sidewall thickness, and air layer conditions vary, and the permittivity also changes with these conditions. These changes in permittivity cause the transmission frequency to modulate, leading to a problem where the accuracy of the information deteriorates. Therefore, conventionally, the transmission frequency was designed higher to ensure accurate data transmission. However, since it was impossible to determine precisely how much higher the transmission frequency should be designed, there was a problem of reduced information reliability. <Prior Arts> (Patent Document) Korean Patent No. 10-1500213(Patent Document) Korean Patent No. 10-1435409(Patent Document) U.S. Patent No. 7,319,380 [DETAILED DESCRIPTION OF THE INVENTION] [TECHNICAL PROBLEM] The technical problem to be solved by the present invention is to provide an inform