The invention relates to a system for determining the tire condition of a vehicle tire in a vehicle, said system comprising a number of sensors, which detect measurement values (m.sub.1, m.sub.2, m.sub.3) relevant to the tire condition, and a device for recording data and transmitting data, said device having a signal connection to the sensors on the input side. According to the invention, the signal output of the device has a preferably wireless signal connection to a readout unit, and the device generates actual tire parameters on the basis of the detected measurement values (m.sub.1, m.sub.2, m.sub.3) and directs said actual tire parameters to the readout unit.

An apparatus for determining tire pressure of an aircraft tire. The apparatus includes a processing system configured to: obtain a first set and a second set of tire measurement data for an aircraft, wherein the first set is from a start of a flight cycle and the second set is from a time before the first set; and determine a steady state tire pressure based on the first and second sets of measurement data.

An apparatus for determining tire pressure of an aircraft tire. The apparatus includes a processing system configured to: obtain a first set and a second set of tire measurement data for an aircraft, wherein the first set is from a start of a flight cycle and the second set is from a time before the first set; and determine a steady state tire pressure based on the first and second sets of measurement data.

An information display device includes an information acquisition unit configured to acquire information; a position acquisition unit configured to acquire position information indicating a position of the information display device; a determination unit configured to determine an output mode for the information acquired by the information acquisition unit based on the position information acquired by the position acquisition unit; a conversion unit configured to convert the information acquired by the information acquisition unit based on the output mode determined by the determination unit; and an output unit configured to output the information converted by the conversion unit based on the output mode determined by the determination unit. The determination unit is configured to determine, as the output mode, a display mode complying with laws and regulations applicable to the position of the information display device based on the position information.

An information display device includes an information acquisition unit configured to acquire information; a position acquisition unit configured to acquire position information indicating a position of the information display device; a determination unit configured to determine an output mode for the information acquired by the information acquisition unit based on the position information acquired by the position acquisition unit; a conversion unit configured to convert the information acquired by the information acquisition unit based on the output mode determined by the determination unit; and an output unit configured to output the information converted by the conversion unit based on the output mode determined by the determination unit. The determination unit is configured to determine, as the output mode, a display mode complying with laws and regulations applicable to the position of the information display device based on the position information.

A pneumatic tire includes a first tread area portion, an electric power source, a transmission device, an accelerometer, and a control unit configured to operate in a power saving mode and a normal mode. A contact of the first tread area portion with a surface is detected by sensing acceleration of the first tread area portion by the accelerometer. The control unit is configured to switch from the normal mode to the power saving mode after a detection that the first tread area portion is on a contact patch of the tire. The control unit is configured to switch from the power saving mode to the normal mode when a first specified time depending on the rotation speed of the tire has elapsed since the detection that the first tread area portion is on the contact patch. A monitoring method and a system are used with the pneumatic tire.

A pneumatic tire includes a first tread area portion, an electric power source, a transmission device, an accelerometer, and a control unit configured to operate in a power saving mode and a normal mode. A contact of the first tread area portion with a surface is detected by sensing acceleration of the first tread area portion by the accelerometer. The control unit is configured to switch from the normal mode to the power saving mode after a detection that the first tread area portion is on a contact patch of the tire. The control unit is configured to switch from the power saving mode to the normal mode when a first specified time depending on the rotation speed of the tire has elapsed since the detection that the first tread area portion is on the contact patch. A monitoring method and a system are used with the pneumatic tire.

A method of monitoring one or more wheels of a vehicle is described. The method includes receiving first accelerometer measurements of a first accelerometer mounted on the vehicle's first wheel when the vehicle is moving during an interval of time, determining based on the first accelerometer measurements a first path followed by the first accelerometer when the vehicle is moving during the interval of time, determining based on the first path that the vehicle's first wheel is out of balance with respect to an axle of the vehicle's first wheel, and responsive to determining that the vehicle's first wheel is out of balance, transmitting to a user device a first alert that the vehicle's first wheel is out of balance.

A method of monitoring one or more wheels of a vehicle is described. The method includes receiving first accelerometer measurements of a first accelerometer mounted on the vehicle's first wheel when the vehicle is moving during an interval of time, determining based on the first accelerometer measurements a first path followed by the first accelerometer when the vehicle is moving during the interval of time, determining based on the first path that the vehicle's first wheel is out of balance with respect to an axle of the vehicle's first wheel, and responsive to determining that the vehicle's first wheel is out of balance, transmitting to a user device a first alert that the vehicle's first wheel is out of balance.

A position estimation device includes an ECU. The ECU is configured to estimate the position of a vehicle using at least a traveled distance of the vehicle. The ECU calculates correction factors for a reference tire rolling radius and stores the correction factors in a storage device. Each of the correction factors is set for a corresponding one of a plurality of vehicle speed ranges. The ECU calculates the traveled distance of the vehicle based on a rotation parameter and the corrected reference tire rolling radius obtained by correcting the reference tire rolling radius using the correction factor.