Abstract: A method of checking tyre pressures using a control device having a wireless communication interface and at least one tyre monitoring device is disclosed. Each tyre monitoring device is mounted on a respective wheel of a vehicle and comprises a wireless communication interface and a pressure sensor for sensing an inflation pressure of a tyre on the respective wheel. The method includes, at the control device: receiving an input and, responsive to the input: identifying a plurality of tyre monitoring devices within a wireless communication range of the control device, wherein the identifying comprises receiving responses from each tyre monitoring device within the wireless communication range, each response including a vehicle identifier associated with a vehicle upon which the tyre monitoring device is installed.

Abstract: A sensor carrier for sensing forces acting upon an axle of an aircraft landing gear assembly is disclosed being arranged to fit within the axle and includes an end coupling for fixing to one end of the axle, and a central coupling for fixing to a central portion of the axle where the axle attaches to a main leg of the assembly. The sensor carrier includes a sensor arrangement arranged to detect strain occurring between the end coupling and the central coupling so that in use, the sensor arrangement indicates strain occurring between the end of the axle and the main leg of the aircraft.

Abstract: A tire monitoring device and method in which an error can be detected and indicated. The tire monitoring device includes an indicator and a wireless communication interface. The method of operating the tire monitoring device includes: receiving an instruction to measure a tire pressure via the wireless communication interface; measuring a tire pressure; determining an error status of the tire pressure monitoring device; and responsive to a determination that the error status is not indicative of an error, activating the indicator to provide an indication based on the tire pressure.

Abstract: A tyre monitor is disclosed including a sensor device configured to operate within an enclosed space formed by the wheel and the tyre, and an energy harvester unit. The energy harvester is arranged to convert a first type of energy experienced by the harvester unit in use (e.g. mechanical energy, thermal energy) into electrical energy to energise the sensor device. The energy harvester may be, for example, a piezoelectric device or a thermoelectric generator. In use, mechanical stresses experienced by the tyre monitor are converted into electrical energy which can be used to energise the sensor as a supplement to energy from the battery within the tyre monitor, thus prolonging its service life.

Abstract: Methods, systems, and non-transitory computer readable media configured to display a geographical map overlaid with a marker layer comprising at least one marker; receive input from a user to change a zoom level of the geographical map from a first map scale to a second map scale; display the geographical map at the second map scale; and overlay the marker layer at the second map scale with the at least one marker at a second marker size. The second marker size is determined based on a correlation between the second map scale and the second marker size, in which (i) the second marker size is increased or decreased in the same direction as the second map scale when the second map scale is within a range from a low threshold point to a high threshold point, and (ii) a ratio change between two adjacent marker sizes is smaller than a ratio change between two corresponding adjacent map scales when the second marker size is outside the range from the low threshold point to the high threshold point.

Abstract: A method of configuring a tire monitoring device including, at the tire monitoring device: entering a configuration mode; responsive to entering the configuration mode, transmitting a first message to a second device, the message indicating that the second device should transmit configuration data to the tire monitoring device; receiving configuration data from the second device in response to the first message; and configuring the tire monitoring device based on the configuration data.

Abstract: A sensor device for use in determining at least one property of a wheel assembly including a tire mounted on a wheel. The sensor device is configured to be attachable to an outer circumferential surface of the wheel which faces an inner circumferential surface of the tire. The sensor device is configured to measure a distance between the sensor device and an object remote from the sensor device.

Abstract: A tire monitor 11 includes a sensor device 12 arranged to detect an operating parameter of a tire and a protective housing 14 for the device, the device being retained on a ring 15 having spaced end portions 16a, 16b, the ring being resiliently radially biased. The provision of a retaining ring facilitates installation of the tire monitor within a tire assembly, so that the sensor device can directly monitor the operating parameter of the tire. The protective housing protects the sensor device from impact, vibration and temperature extremes.

Abstract: A sensor apparatus for measuring a property of a wheel assembly is disclosed including at least one sensor configured to acquire measurement data; and a mounting member attached to the at least one sensor. The mounting member is configured to engage with a wheel such as to retain the sensor on the wheel within an enclosed space formed by the wheel and a tire mounted on the wheel. The mounting member is further configured to enable the sensor to move around the circumference of the wheel when the mounting member is engaged with the wheel.

Abstract: A method of determining a status of a tyre monitoring device is disclosed. The tyre monitoring device includes a counter initiated on a first use of the tyre monitoring device on a wheel and the method includes: determining a current value of the counter; determining a status of the tyre monitoring device based on the current value of the counter; and providing an indication based on the determined status. In some examples, the status is a remaining service lifetime and the indication may be a replacement notification. A method of cross-checking data between tyre monitoring devices is also disclosed. The method includes receiving data from a plurality of tyre monitoring devices associated with respective tyres of a same vehicle; comparing the received data from different ones of the plurality of tyre monitoring devices; determining inconsistent data associated with at least one of the plurality of tyre monitoring devices based on the comparison; and providing an indication of the inconsistent data.

Abstract: A method of communicating configuration data of a tire pressure monitoring device configured to be affixed to a wheel is disclosed. The method includes, at the tire pressure monitoring device, receiving a request to confirm configuration data, and responsive to receipt of the request to confirm configuration data, transmitting a configuration data signal which encodes the configuration data. The configuration data signal is configured to be received and understood by a human.

Abstract: An aircraft tire monitoring system including a processor, and a data carrier having machine readable instructions that, when executed, cause the processor to, based on a plurality of sets of values indicative of tire parameters of aircraft tires, each set of values corresponding to an aircraft comprising a plurality of the aircraft tires, perform operations including determining a remedial action associated with each set of values. The operations include determining a priority associated with the determined remedial actions, and generating, based on the determined remedial actions, a list of aircraft, the list of aircraft ranked based on the determined priority of remedial action. The operations include causing a display device to display the list of aircraft, such that aircraft with a relatively higher priority remedial action are shown higher up the list on the display than aircraft with a relatively lower priority remedial action.

Abstract: A method of determining a tire performance characteristic of a tire including querying, using a processing system, a memory as to a presence of a first set of values indicative of a tire parameter of a tire in the memory, and determining, using the processing system, that the first set of values is insufficient to determine the tire performance characteristic of the tire, The method includes performing steps, using the processing system, comprising one or more of providing an indication that a second set of values indicative of the tire parameter is required to determine the tire performance characteristic of the tire, and retrieving, from the memory, a performance coefficient of the tire corresponding to performance of the tire associated with the first set of values, and determining, based on the performance coefficient, the tire performance characteristic of the tire.

Abstract: A method of determining a tire performance characteristic of a tire. The method includes obtaining, using a processing system, a performance coefficient of the tire corresponding to performance of the tire during a first time period, wherein the performance coefficient is based on a first plurality of values indicative of a tire parameter over the first time period. The method includes obtaining a second plurality of values indicative of the tire parameter over a second time period, and determining, based on the second plurality of values and the performance coefficient, the tire performance characteristic.

Abstract: A tire performance monitoring system including: a tire monitoring device configured to obtain, values indicative of a tire parameter of a tire over a time period, the tire monitoring device comprising a local memory configured to store a performance coefficient corresponding to performance of the tire; and a processing system configured to determine a tire performance characteristic based on the values and the performance coefficient.

Abstract: A method of determining a tire performance characteristic of a tire. The method includes determining that a remote memory, remote from a tire monitoring device associated with the tire, is unavailable, and the remote memory is configured to store a performance coefficient of the tire corresponding to performance of the tire during a first time period. Where the remote memory is unavailable, the method includes either calculating the performance coefficient at a remote device or, obtaining, using the remote device, the performance coefficient from a local memory of the tire monitoring device. The method includes obtaining, using the remote device and from the tire monitoring device, a plurality of values indicative of a tire parameter of the tire during a second time period, and determining, at the remote device and based on the plurality of values and the performance coefficient, the tire performance characteristic.

Abstract: A braking system and a method for applying one or more aircraft wheel brakes according to at least one of a plurality of wheel brake control functions are disclosed. The method includes receiving an indication of an aircraft speed from an aircraft speed indicator, controlling a wheel braking operation of the aircraft according to at least a first wheel brake control function if the aircraft speed indicated by the aircraft speed indicator exceeds a speed threshold, and controlling the wheel braking operation of the aircraft according to at least a second wheel brake control function if the aircraft speed does not exceed the speed threshold. Also disclosed is an aircraft including one or more aircraft wheel brakes and the disclosed braking system.

Abstract: An apparatus for monitoring a tire and/or a wheel including a sensor system; a wireless communication interface; a processor connected to the sensor system and the wireless communication interface; a power source; and a mounting system for attaching the apparatus to a wheel. The mounting system is configured to allow movement of the sensor system relative to the wheel in use.

Abstract: An aircraft tire monitoring device including a wireless communication interface and configured to operate in a first mode in which the wireless communication interface is periodically activated and available for connection to a remote device with a first interval between activations, and a second mode in which the wireless communication interface is periodically activated and available for connection to the remote device with a second interval between activations. The second interval between activations is different to the first interval between activations.

Abstract: A method of synchronising a plurality of aircraft tire monitoring devices, wherein the method includes providing a synchronisation signal, and synchronising the plurality of aircraft tire monitoring devices such that each of the plurality of aircraft tire monitoring devices is available to connect to a remote device in a same time interval.