Vehicle wheel tire inflation pressure, e.g. an aircraft undercarriage wheel tire, is measured in real time by a sensor assembly mounted on a rotary part of the wheel. The assembly includes a piezoresistive cell exposed to inflation gas pressure and an electronics module comprising an assembly of three...http://www.google.com/patents/US5228337?utm_source=gb-gplus-sharePatent US5228337 - Tire pressure and temperature measurement system
