Calibration Routine

One of the main problems with using the wheel radius as an indicator of tire pressure is the individuality of tires. All tires behave a bit differently even when new, and this difference is increased as they are aged and even more if brands from different manufacturers are compared. The influence of velocity on the radius, is one of the parameters that vary between tires. This implies that the δij-parameters do not only depend on the tire pressure.

Implementation

The summary of the implementation system is given in Figure 3.

CONCLUSIONS

In this paper, first, using secondary existing sensors wheel radius were estimated. Then two dynamic vehicle models are formed to defect loss of tire pressure. However, before this system is turned into a product, more tests need to be performed. Most important of these are long time tests, to examine how the behavior of the δij-parameters varies with time. The influence of different surfaces and loads has yet not fully been examined as well as the influence of high velocity. To develop a general calibration routine, the behavior of many different tires and combinations of these is also needed.
