Abstract:
A reconfigurable rollover event detection methodology utilizes an existing body of vehicle sensor data. A number of different algorithms (36, 38, 40, 42, 44) or look-up modules develop rollover detection outputs based on different sets of sensor data, and a meta-algorithm (90) combines the various rollover detection outputs to form a single rollover detection output (93). The number of individual rollover detection outputs is configurable depending on the extent of the available sensor data in a given vehicle and changes in sensor availability that occur due to sensor and communication failures.
Abstract:
An elastomeric seat bladder (30) for a vehicle occupant weight estimation system (10) includes a plurality of elastomeric tethers (38) defined by bands or sheets of elastomeric material coupling upper and lower layers (30a, 30b) of the bladder within a peripheral weld (36) in order to reduce fluid pooling and distention or bulging of the bladder (30) due to localized loading. The elastomeric tethers (38) are spot or seam welded to upper and lower sheets (30a, 30b) of the bladder (30); they extend to limit distension where required, and otherwise partially or fully collapse to minimize vertical shunting of occupant weight through the bladder (30).
Abstract:
A vehicle rollover sensing apparatus (10) and method are provided for detecting an overturn condition of the vehicle. The rollover sensing apparatus (10) includes an angular rate sensor (12) for sensing attitude rate of change of a vehicle and producing an output signal indicative thereof. The rollover sensing apparatus also has an integrator (64) for integrating the sensed attitude rate of change signal over a variable time window (80) and producing an attitude angle. The rollover sensing apparatus further includes deployment logic (66) for comparing the attitude angle and attitude rate of change to a pair of variable threshold values, with a gray-zone (150) that varies based on time, and an output (56) for deploying a vehicle overturn condition signal based on the comparison. Adaptive bias removal and output minimum logic (62) reduces bias and noise associated with the sensed signal.
Abstract:
A vehicle rollover sensing apparatus (10) and method are provided for detecting an overturn condition of the vehicle. The rollover sensing apparatus (10) includes an angular rate sensor (12) for sensing attitude rate of change of a vehicle and producing an output signal indicative thereof. The rollover sensing apparatus also has an integrator (64) for integrating the sensed attitude rate of change signal over a variable time window (80) and producing an attitude angle. The rollover sensing apparatus further includes deployment logic (66) for comparing the attitude angle and attitude rate of change to a pair of variable threshold values, with a gray-zone (150) that varies based on time, and an output (56) for deploying a vehicle overturn condition signal based on the comparison. Adaptive bias removal and output minimum logic (62) reduces bias and noise associated with the sensed signal.