A tire state detection device that includes: a temperature sensor that detects a temperature in a tire air chamber; an acceleration sensor that detects acceleration associated with rotation of a tire; a pressure sensor that detects pressure in the tire air chamber; a storage unit that stores a plurality of maps for calculating a fatigue state of the tire on the basis of the detected temperature, the detected acceleration and the detected pressure; and a tire fatigue index calculation unit that calculates, by referring to each of the plurality of maps, a tire fatigue index from the detected acceleration, the detected temperature, and the detected pressure.

A tire pressure sensor device (122) for a wheel (112) of an aircraft (102) including a pressure sensor (124) for measuring the internal pressure of a tire, a temperature sensor (126) for measuring a temperature local to the tire (116), a memory unit (131) local to the tire for storing data, and a control unit (128) local to the tire arranged to record in the memory unit (131) data of the readings taken at intervals of time. The data recorded for each reading includes an indication of the time of the reading, the tire pressure and the temperature local to the tire. Measurements may be taken and recorded over time, both when the aircraft is on the ground and when the aircraft is in flight. Data may be uploaded to a portable handheld device (140) for analysis when maintaining the tires in their correctly inflated state.

A passive radiofrequency transponder comprises a radiating dipole antenna consisting of a single-strand helical spring having an axis, a median plane, a pitch and a diameter for a given wire diameter, and an electronic portion located inside the radiating antenna. The electronic portion comprises an electronic chip electrically connected to a primary antenna that is electromagnetically coupled to the radiating antenna. The primary antenna has an axis parallel to the axis of the radiating antenna and a median plane superposed with the median plane of the radiating antenna. The primary antenna is circumscribed by a cylinder the diameter of which is larger than one third of the inside diameter of the radiating antenna. The radiofrequency transponder is characterized in that, in a first region of the radiating antenna, in which the latter is not located plumb with the electronic portion, the first helix pitch of the radiating antenna is larger than the second helix pitch of the radiating antenna that does not form part of this first region.

Embodiments of the present invention provide a method and a device for upgrading a tire pressure monitoring system (TPMS) diagnostic tool. The TPMS diagnostic tool is provided with a wireless communications interface. The method includes: obtaining latest version information of the TPMS diagnostic tool from a server through the wireless communications interface, the latest version information including a latest version number and an upgrade path, the upgrade path being used for indicating a storage location of an upgrade package of the TPMS diagnostic tool in the server; obtaining a current version number of the TPMS diagnostic tool; obtaining an upgrade package corresponding to the upgrade path from the server through the wireless communications interface when it is determined that the latest version number is different from the current version number; and upgrading the TPMS diagnostic tool according to the upgrade package. In this way, not only the TPMS diagnostic tool can be upgraded in a timely manner, but also a process of upgrading the TPMS diagnostic tool can be simplified.

The present invention provides a tire pressure sensor identification method, apparatus and device. The method includes: sending an activation signal to a to-be-detected tire pressure sensor, till receiving a feedback signal sent for the activation signal by the to-be-detected tire pressure sensor, where the feedback signal includes feature information of the to-be-detected tire pressure sensor; and identifying the to-be-detected tire pressure sensor according to the feature information. The present invention implements automatic scanning of the tire pressure sensor and can accurately identify the tire pressure sensor according to a scanning result, thereby improving activation efficiency of the tire pressure sensor.

In various aspects, the performance optimization system described herein optimizes vehicle performance through smart alerts communicated to an operator, owner, or fleet manager of a vehicle. When a vehicle characteristic is outside of the target range, a smart alert can be communicated to the user to encourage the user to bring the vehicle characteristic back into a target range. Aspects of the performance optimization system can focus on tire characteristics, which are one type of vehicle characteristic. Exemplary tire characteristics can include tire pressure, tire tread, and tire alignment. In order to generate smart alerts, vehicle information can be gathered from a variety of sources. In particular, information about a tire can be collected from an onboard tire pressure monitoring system, tire mats, or other mechanisms. This information can be analyzed to determine whether vehicle characteristics are inside or outside of a target range for the particular characteristic. When outside the target range, a smart alert is generated.

A tire pressure monitoring system used for a vehicle includes a sensor unit, a receiving device, and a control device. The sensor unit is provided at each wheel of the vehicle, detects tire pressure of the each wheel with a tire pressure sensor and transmits data of the detected tire pressure by radio waves. The receiving device includes a receiving antenna that is provided at an outside of the vehicle to receive the data of the tire pressure transmitted from the sensor unit. The control device includes a data acquisition unit that acquires the data of the tire pressure received by the receiving device.

A tire pressure sensor device (122) for a wheel (112) of an aircraft (102) including a pressure sensor (124) for measuring the internal pressure of a tire, a temperature sensor (126) for measuring a temperature local to the tire (116), a memory unit (131) local to the tire for storing data, and a control unit (128) local to the tire arranged to record in the memory unit (131) data of the readings taken at intervals of time. The data recorded for each reading includes an indication of the time of the reading, the tire pressure and the temperature local to the tire. Measurements may be taken and recorded over time, both when the aircraft is on the ground and when the aircraft is in flight. Data may be uploaded to a portable handheld device (140) for analysis when maintaining the tires in their correctly inflated state.

A tool device for use with a motor vehicle tire pressure monitoring system (TPMS) operable to send and receive signals to a TPMS tire pressure sensor and a radio frequency identification (RFID) tag positioned in a vehicle tire. In one example, the tool is operable to communicate with the RFID tag to receive information from the RFID tag through an ultra-high frequency communication module and send that received RFID tag information to the tire pressure sensor for storage on the tire pressure sensor. The tool may then retrieve the tire pressure sensor information and associated RFID tag information from the sensor and transmit that information to the motor vehicle on-board computer.

A tire pressure monitoring system includes tire pressure sensors installed within vehicle tires, a receiver, an alerting device, an electronic input/output device and an electronic controller. The receiver receives tire pressure signals from the tire pressure sensors, The electronic input/output device provides manual input of instruction and data. The electronic controller is configured to monitor tire pressure and in response to tire pressure in each of vehicle tires achieving a change from a first preset tire pressure to a second preset tire pressure the alerting device is operated to alert a person changing the tire pressure that the change has been achieved. The first preset tire pressure corresponds to paved road driving conditions and the second preset tire pressure corresponds to off-road driving conditions.