The tire unit is a concentration of challenges: MEMS technology, wireless data transmission,
semiconductor, mechanical engineering and wireless data transmission is one of the most critical
part of the architecture.
Engineers have to cope with the target of transmitting data from tire to the HMI in the dash board:
tire rotation, multipath propagation, rubber attenuation, structure of tire including wiring in sidewalls,
chassis attenuation and "white noise" due to environment are some of the unresolved issues in TPMS.
Other critical factor is connected to what is called "auto-location" which is the way to detect exact
position of the deflated tire: front, rear,
left or right; several are the concepts used to get rid of it: some of the existings architectures
are adapted to locate tires position using Low Frequency (LF); some other approaches are typically based on
accelerometers to detected right and left side and discriminating front or rear axle via elaborated software
in the receiver interface. BUt in all those approaches the energy consumption is at the end the killing factor
that impeded technology progress and integration.
