Abstract: A system for monitoring conditions within a tire includes a sensor assemblies (14). The sensor assemblies (14) emit a transmission (26) containing information indicative of conditions within a tire to a receiver (16). The transmission (26) from the sensor assemblies (14) includes an amplitude shift key wake up portion and various data packet portions. The data packet portions are separated by a variable interval to prevent collisions of transmissions at the receiver.

Abstract: A vehicle occupant restraining system includes a plurality of safety restraint devices and utilizes a main controller and a safing controller to determine whether or not conditions are proper for deploying each safety restraint device. The system discriminates between front, side, rear, and roll-over impact events and determines which safety restraint devices should be deployed in response to an impact event. The system also independently determines whether to activate a fuel cut-off switch in response to an impact event. The main and safing controllers utilize vehicle data from a main center tunnel sensor assembly and various satellite sensors to make deployment decisions. The safing controller is used to independently verify whether or not the safety restraint should be deployed.

Abstract: A vehicle seat weight classification system includes a recalibration strategy to ensure sensor accuracy over time. A controller preferably is programmed to periodically sample outputs of the sensors when a seat is unoccupied. Average sensor output information is compared to a currently stored calibration value. If the newly determined average value meets selected criteria, then the sensor is recalibrated using the new information. The system and method of this invention compensates for changes in sensor performance over time caused by changes in system characteristics, such as material offset drift.