The invention relates to a device for measuring an operating variable, to be fitted onto a tyre, comprising: an electronic circuit distributed over a first face of an electronic board and comprising a sensor; a protective housing at least partially covering the electronic circuit; and at least one first antenna wire having one end galvanically connected to the electronic circuit and integrally extending so as to project laterally from the housing;

According to the invention, the housing comprises a lateral portion which projects substantially tangentially to a proximal end portion of the first wire in accordance with the generatrix of said first wire.

The invention relates to a device for measuring an operating variable, to be fitted onto a tyre, comprising: an electronic circuit distributed over a first face of an electronic board and comprising a sensor; a protective housing at least partially covering the electronic circuit; and at least one first antenna wire having one end galvanically connected to the electronic circuit and integrally extending so as to project laterally from the housing;

According to the invention, the housing comprises a lateral portion which projects substantially tangentially to a proximal end portion of the first wire in accordance with the generatrix of said first wire.

An air pressure abnormality determination system determines whether an air pressure abnormality in which an air pressure of at least one of multiple front tires and multiple rear tires drops. The front tires are front wheels of a vehicle. The rear tires are rear wheels of the vehicle and of which outer diameter is different from an outer diameter of the front tires. A determination is made on whether the air pressure abnormality occurs using a corrected wheel speed obtained by correcting one of a front wheel speed that is a wheel speed of the front wheels and a rear wheel speed that is a wheel speed of the rear wheels based on the outer diameter of the front tires and the outer diameter of the rear tires and an uncorrected wheel speed that is the other of the front wheel speed and the rear wheel speed that is uncorrected.

An air pressure abnormality determination system determines whether an air pressure abnormality in which an air pressure of at least one of multiple front tires and multiple rear tires drops. The front tires are front wheels of a vehicle. The rear tires are rear wheels of the vehicle and of which outer diameter is different from an outer diameter of the front tires. A determination is made on whether the air pressure abnormality occurs using a corrected wheel speed obtained by correcting one of a front wheel speed that is a wheel speed of the front wheels and a rear wheel speed that is a wheel speed of the rear wheels based on the outer diameter of the front tires and the outer diameter of the rear tires and an uncorrected wheel speed that is the other of the front wheel speed and the rear wheel speed that is uncorrected.

The invention relates to a wireless tire pressure monitoring system provided on a tire or a rim of a vehicle. The system includes: a magnetometer for measuring a magnetic flux value; a pressure sensor for measuring a pressure value within the tire; a controller for receiving the magnetic flux value measured by the magnetometer and the pressure value measured by the pressure sensor, and determining whether the magnetic flux value fluctuates; and a wireless signal transmitter in signal communication with the controller, and controlled by the controller, wherein when the controller determines that the magnetic flux value fluctuates, the controller activates the wireless signal transmitter or raises the transmitting times per minute of the wireless signal transmitter and the wireless signal transmitter transmits a signal which represents the pressure value. The invention also relates to a method for operating a wireless tire pressure monitoring system.

An integrated circuit (IC) device includes a pressure sensor die, a flexible gel covering a least a pressure-sensing region of the die, and a flexible diaphragm covering the gel. The IC device has encapsulant and a lid that define a cavity above the diaphragm. The lid has an aperture that enables proximate ambient air pressure outside the device to be sensed by the pressure-sensing region through the flexible diaphragm and the flexible gel. The diaphragm protects the gel material from potentially harmful ambient materials. The diaphragm may be a part of the lid.

Embodiments relate to tire localization systems and methods for tire pressure monitoring systems (TPMS). In embodiments, a tire pressure management system comprises a wheel speed sensor (WSS), a tire pressure sensor (TPS) that can comprise circuitry and/or sensors configured to measure or record tire pressure data and TPS phase data, and an electronic control unit (ECU) that can comprise circuitry and/or sensors configured to process the speed sensor data and TPS data. TPMS systems and methods utilize a reference position index transmitted by the TPS to determine a constant value pattern of WSS data representative of a specific tire in order to localize the set of tires.

Embodiments relate to tire localization systems and methods for tire pressure monitoring systems (TPMS). In embodiments, a tire pressure management system comprises a wheel speed sensor (WSS), a tire pressure sensor (TPS) that can comprise circuitry and/or sensors configured to measure or record tire pressure data and TPS phase data, and an electronic control unit (ECU) that can comprise circuitry and/or sensors configured to process the speed sensor data and TPS data. TPMS systems and methods utilize a reference position index transmitted by the TPS to determine a constant value pattern of WSS data representative of a specific tire in order to localize the set of tires.

A tire pressure sensor mounting system for mounting a tire pressure sensor directly to a wheel rim. A mounting base is disposed on the wheel rim. A linear rim strap groove is disposed across a top surface of the mounting base. A plurality of side strap through-slots is transversely disposed through the side surfaces of the mounting base. A portion of a rim strap is disposed in the rim strap groove. A first locking mechanism tightly encloses the rim strap around the wheel rim to secure the mounting base on the wheel rim. A portion of a side strap is disposed through the side strap through-slot. A second locking mechanism locks the side strap around the tire pressure sensor to secure the tire pressure sensor on the mounting base.

A tire pressure sensor mounting system for mounting a tire pressure sensor directly to a wheel rim. A mounting base is disposed on the wheel rim. A linear rim strap groove is disposed across a top surface of the mounting base. A plurality of side strap through-slots is transversely disposed through the side surfaces of the mounting base. A portion of a rim strap is disposed in the rim strap groove. A first locking mechanism tightly encloses the rim strap around the wheel rim to secure the mounting base on the wheel rim. A portion of a side strap is disposed through the side strap through-slot. A second locking mechanism locks the side strap around the tire pressure sensor to secure the tire pressure sensor on the mounting base.