A tire pressure monitoring system and tire pressure detector setting apparatus for tractor-trailer are disclosed. The tractor-trailer has a tractor and a trailer having a plurality of wheels, respectively. The tire pressure monitoring system includes a plurality of tire pressure detectors and a monitoring device. The tire pressure detectors are disposed on each of the wheels, detecting the tire pressure status of each wheel and generating a tire pressure information. Each tire pressure detector has a wheel code corresponding to one of the wheels, respectively. The monitoring device is disposed on the tractor for receiving the tire pressure information and the wheel codes of the corresponding tire pressure detector. When the tire pressure information and the wheel code are transmitted to the monitoring device, the monitoring device accurately monitors the tire pressure status of each wheel.

The present disclosure relates to a system and method for a tire pressure monitoring system. Embodiments may include receiving and storing an input signal in a memory; receiving a digital signal from the memory at a digital signal processor, wherein the digital signal processor includes a plurality of selectable filters; filtering the digital signal through the plurality of selectable filters, wherein filtering the digital signal generates a forward-filtered digital signal; storing the forward-filtered digital signal in the memory; reversing the forward-filtered digital signal, wherein reversing the forward-filtered digital signal generates a reverse-filtered digital signal; and filtering the reverse-filtered digital signal through the plurality of selectable filters, wherein filtering the reverse-filtered digital signal generates a processed signal.

A rim for wheel is described including a measuring system for detecting the vertical load applied to the wheel. The measuring system includes a sensor adapted to detect a deformation of the rim and to transmit a deformation signal to a processing unit. The processing unit receives an output signal of the sensor related to the deformation of the rim detected, and determines the vertical load applied to the wheel.

A radio frequency identification (RFID) tag includes an antenna, an analog front end, a processing circuit, and memory. The analog front end includes a power circuit, a tuning circuit, a transmitter, and a receiver. The power circuit is operably coupled to convert a radio frequency (RF) signal into a power supply voltage. The tuning circuit, when enabled, adjusts an RF characteristic of the analog front end to tune power harvesting from the RF signal. The transmitter is operably coupled to transmit a response signal to the RFID reader via the antenna. The receiver is operably coupled to receive a command signal from the RFID reader, wherein the command signal is contained within a portion of the RF signal. The processing circuit is operable to interpret the command signal and generate the response signal.

A tire pressure monitoring system includes a first tire mounted on a first end of an axle and a second tire mounted on a second end of the axle. A first sensor is mounted on the first tire for measuring a pressure, and a second sensor is mounted on the second tire for measuring a pressure. The system includes means for transmitting measured pressure data from the first sensor and the second sensor to a processor. A tire pressure model is executed on the processor, and includes an aggregator that accumulates the measured pressure data from the first sensor and the second sensor. A noise filter filters sensor noise and generates filtered pressure data from the measured tire pressure data. A detection module receives the filtered pressure data and determines when a leak occurs in one of the tires. A leak notification is generated when the leak occurs.

An auto-location system for auto-locating a wheel in a vehicle comprises: a sensor module which comprises a sensor adapted for sensing a physical property of the tire when mounted in a tire or on an inner surface of the tire of the wheel, an acquisition system adapted for determining when the part of the tire where the sensor is mounted hits the ground, and forms a contact patch with the ground, by analyzing data from the sensor, and a communication system adapted for transmitting a wireless message, in which a unique identifier is embedded, a transmit delay after the part of the tire where the sensor is mounted hits the ground.

A method of determining the health of a tire on a vehicle includes determining a total number of tire inflation events that have occurred due to a loss of tire pressure. A rate in which the tire inflation events have occurred is determined based on the total number of tire inflation events over a predetermined period of time. The health of a tire is determined by comparing the rate in which tire inflation events have occurred to a threshold rate.

A system for determining a tire change status in a vehicle is provided. The system includes at least one processing device and a storage device. The at least one processing device may be arranged to: calculate a value of at least one reference parameter which may be used in indirect tire pressure monitoring; store the calculated value of said at least one reference parameter in the storage device; retrieve a previously stored value of said at least one reference parameter from the storage device; determine a similarity parameter based on a similarity between the calculated value and the previously stored value of said at least one reference parameter; and determine a tire change status, indicating whether or not the tires have been re-filled or replaced, by comparing said similarity parameter with a threshold.

An apparatus includes a device that is configured to determine a condition of a first tire of a vehicle. At a current point in time the device is also configured to determine, on a basis of pressure measured values with respect to a tire pressure of the first tire at the current point in time and at a preceding point in time, a rate of change of the tire pressure of the first tire. At a current point in time the device is also configured to compare the determined rate of change to a reference rate. At a current point in time the device is also configured to determine the condition of the first tire on the basis of the comparison.

A sensing system for a vehicle includes wheel end sensors (WES), each WES proximate to at least one predetermined tire and configured to sense angular data, including at least one of angular position, angular velocity, angular acceleration, and/or angular displacement. The system includes a plurality of tire pressure monitoring (TPM) sensors, each TPM sensor inside one of the tires and configured to sense pressure, temperature, and angular data within said tire. The sensing system is configured to compare the angular data sensed by each WES to the angular data sensed by each TPM sensor to automatically identify, for each TPM sensor, a corresponding WES, and based on the position on the vehicle of the predetermined tire of the corresponding WES, identify the position on the vehicle corresponding to said TPM sensor.