摘要:
A seat weight sensor (10) incorporates a fluid filled bladder (12) placed in series with the load path in the seat (3), whereby a load applied to and distributed across the bladder (12) increases the pressure of the fluid therein. The pressure of the fluid is measured by a pressure sensor (20) and is substantially proportional to the magnitude of the applied load, and substantially inversely proportional to the supported area of the bladder (12). The output signal is substantially linear with respect to weight. Preferably, the amount of fluid in the bladder should be less than the capacity of the bladder when the bladder is unloaded. The seat weight sensor (10) is incorporated into an accupant restraint system (7) for controlling the safety restraint system responsive to the weight of the occupant (5).
摘要:
A child seat anchor apparatus includes at least one sensor (30a, 30b; 52) for measuring tension exerted on a system including a pair of anchor brackets (24a, 24b) disposed between the bottom and back cushions (22, 28) of a vehicle seat (10). In a first mechanization, the anchor brackets (24a, 24b) are directly coupled to individual sensors (30a, 30b) mounted on an anchor frame (32) that is bolted to the seat frame (20). In a second mechanization, the anchor brackets (24a, 24b) are fastened to an anchor frame (50) that is pivotably mounted on the seat frame (20), and the anchor frame (50) is additionally coupled to the seat frame (20) through a single sensor (52) responsive to the tension exerted on the anchor frame (50) by the anchor brackets (24a, 24b). (50) by the anchor brackets (24a, 24b).anchor bracket.
摘要:
An occupant detection system (10) comprises first (12) and second (14) electric field sensors mounted in or on a seat back (16) of a seat (18), and at least one seat weight sensor (22). The first electric field sensor (12) provides a measure of the central/inboard capacitance (C1) of a first electrode (38) located in a region that extends across an upper central region (40) of the seating surface (42) of the seat back (16), and extending downwards towards a middle inboard region (44) of the seating surface (42). The second electric field sensor (14) provides a measure of outboard capacitance (C2) of a second electrode (48) located proximate to the outboard side (46) of the seating surface (42). If (506) the central/inboard capacitane (C1) is less than an associated central/inboard capacitance threshold (C1Thr), and if (508) the measure of the seat weight (W) is less than an associated weight threshold (WThr), then (510) the side air bag inflator (26) is disabled. Otherwise if (512) the outboard capacitance (C2) is greater than an associated outboard capacitance threshold (C2Thr), then (514) a side ratio SR=(W/M)n . C1/C2) is calculated. If the side ratio (SR) is less than an associated side ratio threshold (SRThr), then (510) the side air bag inflator (26) is disabled. Otherwise (518) the side air bag inflator (26) is enabled for deployment responsive to a signal from the side-impact crash sensor (30).
摘要:
A seat occupant detection system comprising: a seat, said seat including a plurality of pressure sensors or switch sensors located integral with said seat, said sensors adapted to give a variable output dependent on the weight or force acting on the respective sensor from an occupant when seated on the seat; and processing means adapted to process the output from said sensors to give an indication of the posture of the seat occupant. The system may be used with a weight estimation system to refine estimated weight.
摘要:
A seat weight sensor (10) incorporates a fluid filled bladder (12) placed in series with the load path in the seat (3), whereby a load applied to and distributed across the bladder (12) increases the pressure of the fluid therein. The pressure of the fluid is measured by a pressure sensor (20) and is substantially proportional to the magnitude of the applied load, and substantially inversely proportional to the supported area of the bladder (12). The output signal is substantially linear with respect to weight. Preferably, the amount of fluid in the bladder should be less than the capacity of the bladder when the bladder is unloaded. The seat weight sensor (10) is incorporated into an accupant restraint system (7) for controlling the safety restraint system responsive to the weight of the occupant (5).
摘要:
An occupant detection system (12) is configured to classify an object that resides on a seat (10) of a vehicle. The system (12) includes a first bladder (22), a second bladder (24), and a differential pressure sensor (30). The first bladder (22) is configured to be disposed in a central area of a seat (10). The second bladder (24) is configured to be disposed in a peripheral area of the seat (10). The differential pressure sensor (30) is fluidicly coupled to the first bladder (22) and the second bladder (24) in a manner effective to determine a pressure difference between a first pressure of the first bladder (22) and a second pressure of the second bladder (24). In one configuration, the first bladder (22) and the second bladder (24) are configured so the pressure difference when a person sits on the seat (10) is greater than the pressure difference when a child-seat occupies the seat (10).
摘要:
An occupant detection system (10) comprises first (12) and second (14) electric field sensors mounted in or on a seat back (16) of a seat (18), and at least one seat weight sensor (22). The first electric field sensor (12) provides a measure of the central/inboard capacitance (C1) of a first electrode (38) located in a region that extends across an upper central region (40) of the seating surface (42) of the seat back (16), and extending downwards towards a middle inboard region (44) of the seating surface (42). The second electric field sensor (14) provides a measure of outboard capacitance (C2) of a second electrode (48) located proximate to the outboard side (46) of the seating surface (42). If (506) the central/inboard capacitane (C1) is less than an associated central/inboard capacitance threshold (C1Thr), and if (508) the measure of the seat weight (W) is less than an associated weight threshold (WThr), then (510) the side air bag inflator (26) is disabled. Otherwise if (512) the outboard capacitance (C2) is greater than an associated outboard capacitance threshold (C2Thr), then (514) a side ratio SR=(W/M)n . C1/C2) is calculated. If the side ratio (SR) is less than an associated side ratio threshold (SRThr), then (510) the side air bag inflator (26) is disabled. Otherwise (518) the side air bag inflator (26) is enabled for deployment responsive to a signal from the side-impact crash sensor (30).