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The paper will present the results and analysis of high resolution pressure measurements in car tires. The measurements have been logged under real traffic conditions like city tours, overland driving or highway rides. Additionally special situations like stop and go, curving and load changes have been tested. Conclusion on the usability of pressure measurements for power saving algorithms of tire pressure measurements transponders will be drawn. Finally algorithms to determine the timing of RF transmission in dependence on the dynamic of pressure signals are suggested and power estimates for systems using these algorithms are given based on existing hardware.

In the case of a side impact the decision to deploy an airbag has to be taken much faster as it would be required for a front impact. Furthermore, there is a significant spread of the measurable acceleration depending on which pillars of the cars side are hit. Measuring the pressure inside the door as a direct result of an impact, the deformation of the door becomes observable. Based on pressure measurements side impacts can be detected much faster and more reliable. Therefore side airbag pressure sensors are established as add-on or replacement for side airbag acceleration sensors. This paper will present a Side Airbag Chip Set comprising of a side airbag pressure sensor and a satellite receiver. The system architecture and the partitioning between a single chip solution for the side airbag pressure sensor module plus the compatible satellite receiver will be described.