A method and a device locate wheels of a vehicle, according to which method at least one wheel has wheel electronics. In accordance with the method, a signal is received on the vehicle side by the wheel electronics, which signal allows conclusions to be drawn about a point in time at which the wheel assumed a first rotation angle position. The signal contains a plurality of packets. At least one time interval between the packets is determined, and at least one estimated value for the at least one time interval is provided on the basis of the at least one determined time interval.

Each of a plurality of tire air pressure detectors includes an information retention portion that retains one or more pieces of timing information indicating the time at which the tire air pressure detector has rotated to a specific detector angle in a first time band for withholding transmission of a radio wave signal, and a radio wave transmission control portion that transmits one or more of the pieces of timing information retained in the information retention portion to a receiver in a second time band enabling transmission of the radio wave signal. The receiver includes an axle rotation amount reader portion that receives axle rotation amount information generated in each of a plurality of axle rotation detection portions, and a position determination portion that calculates an axle rotation amount at the point in time at which the tire air pressure detectors have rotated to the specific detector angle.

A method for configuring an electronic housing mounted on a wheel of a motor vehicle for the purposes of transmitting signals intended for a central unit incorporated into the motor vehicle, involving dividing one turn of the wheel into a predetermined number n of referenced sectors, commanding the emission of a sequence of n successive signals, referred to as configuration signals, which are synchronized with the n referenced sectors and of emission duration t.sub.emT/n, where T is the period of rotation of the wheel, identifying and memorizing the referenced sectors corresponding to the configuration signals received by the central unit, and configuring the electronic housing by selecting at least one of the identified referenced sectors for the subsequent emission of the signals intended for the central unit.

A system includes detecting devices secured respectively on wheels of a vehicle at different angular positions, sensors assigned respectively to the wheels and a control unit. Each detecting device emits a detecting signal when disposed at a first position and a second position different from the first position by a first angle . The first position where each detecting device emits the detecting signal during a current rotation cycle of the respective wheel differs from that during a next rotation cycle of the respective wheel by a second angle. The control device analyzes the detecting signals and tooth number signals from the sensors to associate the detecting devices respectively with the sensors.

A vehicle is mounted with a pulse detecting unit that detects rotation of a wheel as pulses, a wheel rotation number storage unit that stores the number of pulses in correspondence with time, and a wheel position specifying device that specifies on which of the plurality of wheels the tire state detecting device arranged on each wheel is arranged. The wheel position specifying device includes a reception unit that receives a transmission signal, including a time required for the wheel to make a predetermined number of rotations, transmitted from each tire state detecting device, and a specifying unit that specifies the wheel on which each tire state detecting device is arranged from a difference of the number of pulses counted during the time included in the transmission signal and the number of pulses while the wheel makes the predetermined number of rotations.

The present disclosure provides a left and right wheel determination method, a wheel pressure monitoring chip and system, and related apparatuses. The left and right wheel determination method includes: obtaining a time duration for a wheel to rotate for a predetermined number of revolutions after the wheel being detected as rotating; sampling centrifugal acceleration and tangential acceleration of the wheel within the time duration; determining an overrun-lag relationship between the centrifugal acceleration and the tangential acceleration of the wheel based on a serial number of a sampling time-point corresponding to the centrifugal acceleration and a serial number of a sampling time-point corresponding to the tangential acceleration; and determining the wheel to be of a left wheel or a right wheel based on the overrun-lag relationship between the centrifugal acceleration and the tangential acceleration of the wheel.

A tire condition detecting apparatus includes a condition detecting section, a transmission section, and a transmission-side control section. The transmission section is configured to transmit a signal that contains information related to the condition of the tire to a receiver, which includes a reception-side control section. The reception-side control section identifies the position of the wheel assembly in which the tire condition detecting apparatus is provided based on the received signal strength indication (RSSI) of the signal. The transmission-side control section is configured to cause a position detecting signal and an instruction signal to be transmitted from the transmission section to the receiver. The position detecting signal is configured to cause the reception-side control section to identify the position of the tire condition detecting apparatus. The instruction signal is transmitted before the position detecting signal is transmitted and instructs the reception-side control section to start obtaining the RSSI.

Disclosed is a tire pressure monitoring system and a method for performing auto-location thereof that simply identifies the position of a tire pressure monitoring module in a direct scheme tire pressure monitoring system to perform auto-location.

Determining installation positions of tires can include: measuring, by a magnetic sensor provided in each tire in the same manner, a first magnetic field strength in a first direction and a second magnetic field strength in a second direction, where the first direction is a circumferential or axial direction of the tire and the second direction is a radial direction of the tire; acquiring a first magnetic field strength sampling value of the tire by sampling the first magnetic field strength; acquiring a second magnetic field strength sampling value of the tire by sampling the second magnetic field strength; calculating a difference between the first and second magnetic field strength sampling values; and determining whether the installation position of the tire is on the left or right side of a vehicle according to a change trend of the calculated difference of the tire.

A tire wheel position detection device is provided. The tire wheel position detection device includes a transmitter attached to each tire wheel and including a first controller to transmit a frame including unique identification information, and a receiver including a second controller that performs tire wheel position detection through selecting, from the identification informations included in the frames, candidate identification informations indicating candidates to be registered, and identifying, from the candidate identification informations, the candidate identification informations that match the transmitters attached to the tire wheels, and storing the tire wheels and the identification informations of the transmitters in association with each other. Even if the candidate identification information is identified as the ID information of any of the transmitters, the second controller does not readily fix nor register it but makes a provisional fixing and definitely determines and registers it upon determining it is highly likely.