Industry first for truck and bus TPMS technology 29 April 2015

US-based Freescale Semiconductor has extended its tyre pressure monitoring system (TPMS) from passenger cars up to heavy-duty trucks and buses, with the addition of its wireless FXTH8715 family.

Babak Taheri, vice president and general manager of Freescale's sensor solutions division, says the new devices are the industry's smallest and offer the highest pressure accuracy for large vehicles.

The ultra-compact system, which can be positioned on the valve stem or integrated into tyre sidewalls for OEMs, include a dual-axis accelerometer, motion sensor, RF transmitter, low frequency receiver, pressure and temperature sensor and a microcontroller – all housed in a 7x7 mm package.

In addition to its accuracy, the system's onboard intelligence enables the collection and transmission of senor data, including pressure, temperature and acceleration for analysis purposes, he adds.

"Highly accurate TPMS capable of communicating wirelessly offer tremendous advantages in terms of driver safety, fuel efficiency, reliability, tyre wear and advance prognostics for trucks and heavy vehicles," states Taheri.

"Freescale's new FXTH8715 family takes tyre pressure monitoring to new levels by capturing and transmitting valuable sensor data that helps fleet managers not only monitor tyre pressure, but also track driving behaviour and optimise predictive maintenance," he adds.

Pressure accuracy is impressive, at +/-17kPa, compared with the nearest competitor at +/- 23kPa.

The family's products are also claimed to offer the highest operating range in the industry (100—1,500 kPa versus the nearest competitor at 100-1,300 kPa).

Brian Tinham

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