The present application relates to a wheel with a sound absorber, the sound absorber being mounted in a wheel air chamber to reduce acoustic resonance, wherein the sound absorber is configured as a flat hexahedral box resonator and fastened to a wheel hub through a band, a first positioning mechanism is provided between the hub and the box resonator to fix the relative positions of the hub and the box resonator, and a second positioning mechanism is provided between the box resonator and the band to fix the relative positions of the box resonator and the band. According to the technical solution of the present disclosure, the resonator is positioned and fixed more reliably on the wheel, and the wheel is simple and economical in manufacturing, and convenient and controllable in installation and operation.

A tire having an adhesive sealant applied to the radial interior of the tire in the region of the belt reinforcements of the crown with a noise-dampening foam ring having circumferential grooves in the radial outside surface of the foam is applied to the adhesive sealant. The grooves of the foam are laterally aligned with the circumferential grooves of the tire such that the foam touches the sealant on areas that are not laterally aligned with the longitudinal grooves of the tire.

The aim of the disclosed solution is to present a method of inserting an insert to a tread a tire such that the insert, particularly a fragile insert such as an insert comprising electronic components, may be protected against gripping and impact forces during its insertion. The disclosed solution is premised on an insert being housed, at least partially, in a sleeve upon and during its installation to a tread of a tire. Thus, the sleeve may be employed to provide protection for the insert against gripping and/or impact forces during the insertion of the insert into the tread a tire.

The aim of the disclosed solution is to present a method of inserting an insert to a tread a tire such that the insert, particularly a fragile insert such as an insert comprising electronic components, may be protected against gripping and impact forces during its insertion. The disclosed solution is premised on an insert being housed, at least partially, in a sleeve upon and during its installation to a tread of a tire. Thus, the sleeve may be employed to provide protection for the insert against gripping and/or impact forces during the insertion of the insert into the tread a tire.

A method for manufacturing a tire having a sensor container and a tire manufactured by the manufacturing method, and more particularly, a method for manufacturing a tire having a sensor container for preventing the sensor container from falling off during high-speed driving, and a tire manufactured by the manufacturing method are proposed. The method for manufacturing a tire having a sensor container, includes the steps of a) curing a container unit; b) forming a dummy by filling an inside of the cured container unit with a dummy material in which urethane and a curing agent are mixed; c) attaching the container unit including the dummy formed by curing to a tire; d) curing the tire to which the container unit is attached; e) removing the dummy included in the container unit attached to the cured tire; and f) mounting a sensor at a position where the dummy is removed.

A method for manufacturing a tire having a sensor container and a tire manufactured by the manufacturing method, and more particularly, a method for manufacturing a tire having a sensor container for preventing the sensor container from falling off during high-speed driving, and a tire manufactured by the manufacturing method are proposed. The method for manufacturing a tire having a sensor container, includes the steps of a) curing a container unit; b) forming a dummy by filling an inside of the cured container unit with a dummy material in which urethane and a curing agent are mixed; c) attaching the container unit including the dummy formed by curing to a tire; d) curing the tire to which the container unit is attached; e) removing the dummy included in the container unit attached to the cured tire; and f) mounting a sensor at a position where the dummy is removed.

Methods of measuring a thickness of a material are disclosed. An oscillating signal at a measurement frequency is applied to a circuit including an inductive component and a capacitive component provided using a pair of capacitive sensor electrodes adjacent the material. The measurement frequency is less than a resonant frequency of the circuit, and the resonant frequency is based on the inductive component and the capacitive component. Information regarding a value of a measured parameter is generated based on applying the oscillating signal at the measurement frequency to the circuit. A value of the measured parameter is related to the thickness of the material.

Methods of measuring a thickness of a material are disclosed. An oscillating signal at a measurement frequency is applied to a circuit including an inductive component and a capacitive component provided using a pair of capacitive sensor electrodes adjacent the material. The measurement frequency is less than a resonant frequency of the circuit, and the resonant frequency is based on the inductive component and the capacitive component. Information regarding a value of a measured parameter is generated based on applying the oscillating signal at the measurement frequency to the circuit. A value of the measured parameter is related to the thickness of the material.

A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the running tire, the time-varying waveform of vibration having been detected by a vibration detecting means, a plurality of intrinsic vibration modes, from data of the time-varying waveform of vibration of the tire, using an algorithm of empirical mode decomposition; selecting an arbitrary intrinsic vibration mode from the plurality of intrinsic vibration modes; calculating a statistic amount from the distribution of feature data calculated by performing Hilbert transform on the selected intrinsic vibration mode to set the statistic amount as a feature amount; and determining the road surface condition from the feature amount and a feature amount obtained in advance for each road surface condition.

A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the running tire, the time-varying waveform of vibration having been detected by a vibration detecting means, a plurality of intrinsic vibration modes, from data of the time-varying waveform of vibration of the tire, using an algorithm of empirical mode decomposition; selecting an arbitrary intrinsic vibration mode from the plurality of intrinsic vibration modes; calculating a statistic amount from the distribution of feature data calculated by performing Hilbert transform on the selected intrinsic vibration mode to set the statistic amount as a feature amount; and determining the road surface condition from the feature amount and a feature amount obtained in advance for each road surface condition.