Abstract:
A chip cooling system 10 including a semiconductor device 12 having a bulk region 14, wherein at least one fluid channel 16 extends at least partially through the bulk region 14, the fluid channel 16 having an inlet 18 and an outlet 20, a fluid inlet port 36 in fluid communication with the channel inlet 18, and a fluid outlet port 38 in fluid communication with the channel outlet 20, and a cooling fluid flows from the fluid inlet port 36, through the fluid channel 16 and to the fluid outlet port 38 to cool the bulk region 14.
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:
Impending rollover events are detected based on differential z-axis (i.e., vertical) acceleration. Vertical or z-axis acceleration measured at laterally opposite sides of the vehicle (10) are filtered (34, 36) and differenced (72/88/92), and the differential acceleration is processed and compared to a calibrated threshold (78/90/96) to detect impending rollover. Separate algorithms (38, 40, 42) are employed to detect different categories of rollover events, and a sum of the z-axis acceleration measurements is used as a safing signal (44, 50).
Abstract:
An event discrimination methodology executes multiple versions of the same or different event discrimination algorithms (36-42) and logically or arithmetically combines their outputs to distinguish between specified events and non-events (46). One given algorithm is repeatedly executed with different sets of calibration data, or alternately, a number of different algorithms are executed. In cases where the algorithm results are arithmetically combined (60), the weights accorded to each algorithm result are dynamically adjusted based on driver input or vehicle dynamic behavior data to accord highest weight to the algorithm(s) calibrated to identify events associated with the detected driver input or vehicle dynamic behavior (68, 70).
Abstract:
A chip cooling system 10 including a semiconductor device 12 having a bulk region 14, wherein at least one fluid channel 16 extends at least partially through the bulk region 14, the fluid channel 16 having an inlet 18 and an outlet 20, a fluid inlet port 36 in fluid communication with the channel inlet 18, and a fluid outlet port 38 in fluid communication with the channel outlet 20, and a cooling fluid flows from the fluid inlet port 36, through the fluid channel 16 and to the fluid outlet port 38 to cool the bulk region 14.
Abstract:
A rollover warning and detection method for a transport vehicle (10) is adaptively adjustable to take into account the CG height of the vehicle. Measures of the vehicle speed, lateral acceleration and yaw rate are sampled during normal driving conditions and used to estimate the CG height of the vehicle (18, 20, 22, 36, 40). The centrifugal acceleration acting on the vehicle is calculated as the product of vehicle speed and yaw rate (36), and the CG height is estimated based on the relationship between the calculated centrifugal acceleration and the measured lateral acceleration (40). The estimated CG height of the vehicle is used to adjust various calibrated rollover detection thresholds (50, 52) so that algorithm outputs such as rollover warnings automatically take into consideration vehicle loading effects.
Abstract:
An arming signal for enabling deployment of rollover safety devices (28) by a vehicle rollover detection apparatus (20, 26) is based on an off-axis measure of vehicle acceleration. A low-g accelerometer (22) mounted perpendicular to the longitudinal axis of the vehicle (10) but at an angle with respect to Earth's ground plane detects components of both lateral and vertical vehicle accelerations. The measurement angle is selected to apportion the lateral vs. vertical measurement sensitivity in accordance with calibrated lateral and vertical acceleration thresholds, and an arming signal is generated when a filtered version of the measured acceleration exceeds an arming threshold (40, 42, 44, 48).