Electronic member comprising: A movement sensor and/or a proximity sensor; A microprocessor coupled to the sensor to form a data signal; A storage area connected to the microprocessor for storing a part of the data signal and an identification information element; An energy source; and A radio transmitter connected to the microprocessor;
characterized in that the microprocessor is capable of defining two states of the electronic member, the storage area contains a predetermined change of state which is defined on the basis of the two states, the microprocessor is capable, having detected the predetermined change of state, of transmitting the identification information element via a radiofrequency signal transmitted during a time interval T and then stopping the transmission of the radiofrequency signal at the end of said time interval T and the time interval T is between 20 seconds and 10 minutes.

A duplex Bluetooth transmission tire pressure system and a method thereof are provided. The system includes a Bluetooth tire pressure detector and a transceiver host, and the two can duplex Bluetooth transmit to each other, so that to complete locating and tire condition detecting. The transceiver host controls a locating program that controls the Bluetooth tire pressure detector to start or stop and limit the transmitting packet of the tire condition program of the Bluetooth tire pressure detector.

In a method for controlling a processor on a wheel, wheel operation parameters are calculated and transmitted to a CPU. A first default operating mode (standby mode) is defined, during which activities related to calculating and checking the characteristic data of the tread mark of the tire are deactivated, a second operating mode for detection of significant changes in the value of a characteristic datum of the tread mark, sought during the appearance, in standby mode, of at least one event likely to be preceded by a significant change in the value, and a third operating mode for calculation and transmission, to a CPU, a sequence of values representing the characteristic datum of the footprint, sought during the confirmation, in detection mode, of a significant change in the value of the characteristic datum of the tread mark, and at the end of which a switch is made into monitoring mode.

A reception control section obtains a rotation angle of each wheel assembly when a reception circuit receives transmission data. The reception control section calculates the absolute value of the difference between the obtained rotation angle and a previously obtained rotation angle. The reception control section determines whether the absolute value of the difference is included in a reference range or a specific range. The reference range includes 0. The specific range includes the angle difference between specific angles.

A tire pressure monitoring device can include: a magnetic sensor configured to measure a first magnetic field intensity in a first direction, and to measure second magnetic field intensity in a second direction; and a controller configured to control a state of the tire pressure monitoring device based on a variation of the first magnetic field intensity and a variation of the second magnetic field intensity.

A method for monitoring a tire condition includes the following steps: sense a rotational speed of a tire of a moving vehicle via at least one monitoring device of a wireless monitoring system disposed in the vehicle; when the sensed rotational speed reaches a predetermined rotational speed range, obtain a condition of the rotating tire through at least one monitoring device to generate first condition data; compare the first condition data with a plurality of pavement feature data to obtain the corresponding pavement feature data; process with the obtained pavement feature data and the first condition data to filter a pavement feature out of the first condition data, generating second condition data; determine whether the condition of the tire is abnormal based on the second condition data; and send out a warning message when the condition of the tire is determined as being abnormal.

A tire auto-location system for a tire pressure monitor sensor and operating method thereof are provided. The tire auto-location system for a tire pressure monitor sensor includes a host, a plurality of axle rotation detection devices, and a plurality of tire pressure monitor sensors. By allowing the host to receive and compare the corresponding gear ring rotation data transmitted by the plurality of axle rotation detection devices and the corresponding tire rotation data transmitted by the plurality of tire pressure monitor sensors, the location of each tire pressure monitor sensor can be confirmed. At the same time, since the host and the tire pressure monitor sensor have two-way transmission functions, the host can react quickly and promptly command the tire pressure monitor sensor to stop sensing and transmitting after completing the calculation.

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.

Embodiments may provide a system, a wheel localizer, a wheel localization device, or methods for locating a position of at least one wheel out of a plurality of wheels of a vehicle. In one embodiment, a system comprises a detector that obtains information related to a reference magnetic field in which the at least one wheel rotates, an antilock braking system (ABS) unit that obtains information related to angular rotations of the plurality of wheels, and a locator that determines the position of the at least one wheel based, at least in part, on the information related to the reference magnetic field and the information related to the angular rotations of plurality of wheels, where the position comprises a wheel location from among the plurality of wheels. The reference magnetic field may be the earth's magnetic field.

A system in a device includes an electronic module configured to perform a function associated with the device, a power generation apparatus for generating electrical energy in response to motion of the device, and a switch element interposed between the electronic module and the power generation device. The switch element switches from a first state to a second state when the power generation apparatus generates the electrical energy. The electronic module is in a powered-off mode in which a power storage device is disconnected from the electronic module whenever the switch element is in the first state. The electronic module is switched to a powered-on mode in which the power storage device is in electrically connected to the electronic module whenever the switch element is in the second state.