A tire pressure monitoring system is configured to communicate with a tire pressure sensor and has an antenna assembly and a transmitter. The antenna assembly has a transmitting and a cancelling antenna. The transmitting antenna has a wire loop defined by a plurality of coils with a first terminal and a second terminal. The cancelling antenna has a wire loop defined by a plurality of coils with a first terminal and a second terminal. The arrangement of the transmitting antenna and the cancelling antenna defines a proximal zone wherein a field from the transmitting antenna is configured to be sufficient to actuate the tire pressure monitor, while beyond the proximal zone, a field from the cancelling antenna cancels the field from the transmitting antenna. The transmitter is coupled to the transmitting antenna, and the cancelling antenna. An antenna and methods are likewise disclosed.

A tire pressure monitoring system includes a plurality of detection devices that are provided in respective ones of a plurality of tires of a vehicle and each wirelessly transmit an air pressure signal including air pressure information of tire in response to a request signal and a monitoring device that transmits the request signal to each of the detection devices and receives the air pressure signal transmitted from each of the detection devices in response to the request signal, to monitor air pressure of each of the tires. Each of the detection devices, when receiving a request signal, measures the received signal strength of the received request signal and transmits to the monitoring device an air pressure signal at a different diming in accordance with the measured received signal strength. The monitoring device receives the air pressure signals transmitted from the plurality of detection devices at different timings.

Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.

A tire pressure monitoring system includes a plurality of detection devices that are provided in respective ones of a plurality of tires of a vehicle and each wirelessly transmit an air pressure signal including air pressure information of tire in response to a request signal and a monitoring device that transmits the request signal to each of the detection devices and receives the air pressure signal transmitted from each of the detection devices in response to the request signal, to monitor air pressure of each of the tires. Each of the detection devices, when receiving a request signal, measures the received signal strength of the received request signal and transmits to the monitoring device an air pressure signal at a different diming in accordance with the measured received signal strength. The monitoring device receives the air pressure signals transmitted from the plurality of detection devices at different timings.

A method for detecting a change in location of the wheels of a motor vehicle, the vehicle having at least one central processing unit, and two wheel units which each includes an electronic assembly of sensors and which are each mounted on one of the wheels. The method including a monitoring step, during which a first pattern representative of the location of the wheel unit is established, when the vehicle is at a standstill, and an evaluation step, during which a possible first variation in each first pattern is measured to estimate if the location of the wheel has changed.

Method and apparatus are disclosed for monitoring tires of vehicles via personal area networks. An example vehicle includes a body, nodes spaced apart on the body, a tire, a transceiver coupled to the tire, and a tire detector. The tire detector is to determine a tire position based on wireless communication between the transceiver and the nodes, identify a duration that the tire is at the tire position, and present a warning to rotate the tire position when the duration is greater than a predetermined threshold.

Method and apparatus are disclosed for monitoring tires of vehicles via personal area networks. An example vehicle includes a body, nodes spaced apart on the body, a tire, a transceiver coupled to the tire, and a tire detector. The tire detector is to determine a tire position based on wireless communication between the transceiver and the nodes, identify a duration that the tire is at the tire position, and present a warning to rotate the tire position when the duration is greater than a predetermined threshold.

Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.

A communication device mounting position determination system and apparatus are provided configured to limit where a device can be installed in a vehicle. An ECU transmits an LF signal from an LF antenna to sensor units. The sensor units receive and detect the signal strength. The sensor units transmit a UHF signal to the ECU having information including the signal strength of the LF signal. The ECU detects the signal strength of the UHF signals. For example, on the basis of the signal strength of the LF signal, the ECU makes a determination as to which of the wheels is the transmission source of the UHF signal, with respect to the left-right direction of the body of the vehicle. Further, on the basis of the signal strength of the UHF signal received by the ECU, the ECU makes the determination with respect to the front-rear direction of the vehicle.

A tyre monitoring device, tyre monitoring system and method including a wireless interface having range determining capability and a processor. The processor: receives a command via the wireless interface from a second device of the tyre monitoring system; determines a range to the second device; and executes the command if the range to the second device is less than a predetermined threshold.