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.

Disclosed herein are devices and systems for continuous control of tire pressure. In one aspect, a device for continuously controlling tire pressure includes a bracket, a fixed non-rotating member fixedly attached to the bracket, and a non-fixed rotating member rotatably attached thereto. The fixed non-rotating member has at least one first seal surface, the at least one seal surface configured to be in fluid communication with a compressed air source. The non-fixed rotating member has at least one second seal surface, wherein an air chamber defined within a volume between interacting the at least one first seal surface and the at least one second seal surface causes fluid communication between an interior space of the tire and the compressed air source.

A method for controlling a trigger of an activation of a function by a control module housed in a wheel unit and communicating, via a communication module, which includes a first clock employing a crystal oscillator and which communicates via UHF radio waves, with outside the wheel unit, requests to activate a function to be performed at a predetermined time being transmitted to the control module. When an activation is required, a first count of time to activation is started in the communication module by the first clock, a request to activate being transmitted from the communication module to the control module which, upon receipt, is reconfigured in order to activate the function at the predetermined time, an end of the count in the communication module being transmitted to the control module, in order for the trigger to occur at the predetermined time.

An embodiment system for monitoring a tire pressure includes a wheel speed sensor mounted on each wheel of a vehicle, a set button for resetting a pressure setting, and a controller configured to determine whether the tire pressure is low using the wheel speed sensor, output a low pressure warning, determine whether a user has an intention to reset the pressure setting when a manipulation of the set button is sensed after the low pressure warning is output, and reset the pressure setting in response to a response of the user.

A computer-implemented method of compressing a data set including a plurality of historical tire monitoring measurements spaced by a first time interval. The method includes discarding particular ones of the historical tire monitoring measurements which are older than a first threshold age, such that historical tire monitoring measurements which are older than the first threshold age are retained at a second time interval that is longer than the first time interval.

A computer-implemented method of aircraft tire maintenance is disclosed including the steps of receiving data of a plurality of pressure and temperature measurements, each of the plurality of pressure and temperature measurements having an associated time stamp; determining stable points in the plurality of pressure and temperature measurements; and using the stable points for determining tire maintenance. A computer readable medium with instructions to implement the method and a processing system to implement the method are also disclosed.

At a control circuit of a TPM sensor, one or more of a first adjustment to the periodicity, a second adjustment to the content, and a third adjustment to the length of a message are determined based upon the operational history of the sensor. The adjustments are applied to the messages and adjusted messages are transmitted.

A system for detecting pressure and wear conditions of tires that includes a module positioned inside each wheel of a vehicle. The module includes sensors, a processor, a transmitter and a power source for powering the module. The output from the sensors in each wheel is fed to the processors of each wheel for data processing and the data is transmitted by the transmitter in each wheel to a receiver and data processor located outside of the wheels. The data processor is designed to analyze the received processed data from the modules, and to provide alerts based on stored information and by comparing the processed data from the first wheel with the processed data from the second wheel.

A method of performing a configuration procedure for first and second tire pressure monitoring devices. The method includes loading the first tire pressure monitoring device with first configuration data, and subsequently transmitting, from the first tire pressure monitoring device, a first configuration data signal which encodes the first configuration data. The method includes subsequently loading the second tire pressure monitoring device with second configuration data, and subsequently ending the configuration procedure without transmitting a second configuration data signal which encodes the second configuration data.

A method of monitoring the pressure of a tire of an aircraft is disclosed including taking two or more pressure readings from the tire at different times; calculating an estimated deflation rate based on the pressure readings; and calculating a time for the tire to deflate to a reference pressure level based on the estimated deflation rate. Two or more temperature readings are each associated with one of the pressure readings, and the estimated deflation rate is calculated by normalising each pressure reading based on its associated temperature reading and a common reference temperature to obtain a temperature-normalised pressure reading, and calculating the estimated deflation rate based on the temperature-normalised pressure readings. The estimated deflation rate is compared with a threshold, and a warning provided if the estimated deflation rate exceeds the threshold.