Abstract
Since under-inflated wheels may lead to unsafe driving conditions, in many countries all the new cars must be equipped with tire pressure monitoring systems (TPMS). Such devices can be “direct”, in case air pressure sensors are employed, or “indirect”, if low tires are detected by comparing relative wheel speeds, typically via already available speed sensors. While the former are perfectly suited but costly, the latter are cheaper but they typically cannot be used to detect four deflated wheels. In this work, we present a “hybrid” solution, which is able to estimate the pressure of all four wheel by employing a single pressure sensor. Then, such a solution turns out to be a good trade-off between the systems cost and the measurement performance. The effectiveness of the approach is illustrated via experimental tests carried out on a real vehicle setup.
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