摘要:
A floor sensor (14) is disposed at a center portion of a vehicle body (10) and front sensors (16, 18) are disposed at front portions of the vehicle body (10). An airbag apparatus (30) always activates when a value determined by the relationship between a floor deceleration (GF) detected by the floor sensor (14) and a change in floor velocity (Vn) exceeds a High Map toward the high side of the floor velocity. The airbag apparatus (30) also activates on the condition that the value determined by the relationship between the front deceleration (Gs*) detected by the front sensors (16, 18) and the change in floor velocity (Vn) exceeds a Front Map toward the high side of the floor deceleration (GF) when the value determined by the relationship between the floor deceleration (GF) detected by the floor sensor (14) and the change in floor velocity (Vn) exceeds the Low Map but does not exceed the High Map toward the high side of the floor velocity.
摘要:
A load sensing device comprise an inner member provided at a front part of a vehicle and a load sensor provided at a position before a front of the inner member, in addition to an outer member and a load transfer member. The outer member is provided at the front part of the vehicle so as to be located more frontward than the load sensor so that a space is formed between the outer member and the load sensor. The outer member is in charge of allowing the load sensor to sense, via the outer member, a load applied to a front of the vehicle. The load transfer member, made of a hard material, is disposed adjacently to the load sensor within the space between the outer member and the load sensor. The load sensor is allowed to move along the inner member in the back-and-forth direction of the vehicle.
摘要:
An airbag trigger control system is provided with a first sensor which is disposed in a predetermined position in a vehicle body and outputs a signal corresponding to an impact exerted to the vehicle body, a trigger control system which triggers an airbag when a parameter determined on the basis of the signal output from the first sensor exceeds a predetermined threshold value, a second sensor which is disposed forward of the first sensor in the vehicle body and outputs a signal corresponding to an impact exerted to the vehicle body, and a threshold value changing device which changes the predetermined threshold value in accordance with the signal output by the second sensor. The second sensor outputs a predetermined signal at predetermined intervals, and the threshold value changing device changes the predetermined threshold value to a given value when the output signal of the second sensor is not detected in a predetermined number of successive control cycles.
摘要:
A satellite sensor and a floor sensor are provided in a forward portion and a central portion, respectively, of a vehicle body. A calculated value and a speed are determined through predetermined processing of a deceleration detected based on an output signal of the floor sensor. If a value determined from the relationship between the calculated value and the speed exceeds a predetermined threshold changing pattern, an airbag apparatus is activated. The threshold changing pattern is set by selecting a map from a Hi map, a Lo1 map, a Lo2 map and a Lo3 map based on a deceleration determined from an output signal of the satellite sensor. If a map different from the current map is to be set as a threshold changing pattern, the threshold changing pattern is set to the desired map after a state that allows the map to be set continues for a time corresponding to a difference between the two maps.
摘要:
In the case of a severe collision, the severity of the collision exceeds a first threshold value at which a pretensioner mechanism starts to activate, and then exceeds a second threshold value within a collision-discriminating time range T following the start of the activation; therefore, the force limiter mechanism unit is set at a high load. In the case of a gentle collision, the severity of the collision exceeds the first threshold value, at which the pretensioner mechanism starts to activate, but does not exceed the second threshold value within the collision-discriminating time range T following the start of the activation; therefore the force limiter mechanism unit is set at a low load. Therefore, without a determination delay, the switching of the force limiter mechanism can be appropriately selected.
摘要:
In the case of a severe collision, the severity of the collision exceeds a first threshold value at which a pretensioner mechanism starts to activate, and then exceeds a second threshold value within a collision-discriminating time range T following the start of the activation; therefore, the force limiter mechanism unit is set at a high load. In the case of a gentle collision, the severity of the collision exceeds the first threshold value, at which the pretensioner mechanism starts to activate, but does not exceed the second threshold value within the collision-discriminating time range T following the start of the activation; therefore the force limiter mechanism unit is set at a low load. Therefore, without a determination delay, the switching of the force limiter mechanism can be appropriately selected.
摘要:
A load sensor includes a optical fiber sensor that provides output analog signals in response to shocks of various magnitudes caused by hits by a vehicle on various objects, two or more amplifiers each of which approximates a non linear function of the analog signals and a unit that converts the linear functions into digital data. Therefore, each analog signal either in a lower magnitude range or a higher magnitude range can be amplified by one of the amplifiers that has a more suitable gain, so that the magnitude of the shock can be accurately converted into digital data for a pedestrian protection airbag system.
摘要:
From a collision load, a one-time integration value and a two-time integration value are computed. The one-time integration value and two-time integration value are then used for obtaining a mass and rigidity of a collision object as two primary parameters. The obtained two primary parameters are used for determining whether or not the collision object is a pedestrian. This achieves accuracy in determining the collision object that is remarkably superior to a conventional method that uses a collision load waveform.
摘要:
A vehicular bumper structure includes plural load detection sensors (28, 30, 32, 34, 52) disposed at predetermined intervals in a vehicle body vertical direction between a load transmitting plate (36, 50) disposed with a bumper touch sensor and a front wall portion (20C) of a bumper reinforcement. The load transmitting plate (36, 50) is configured so as to be displaced towards a vehicle body rear side with respect to the front wall portion (20C) of the bumper reinforcement (20).
摘要:
In a vehicle bumper structure, an optical fiber sensor (32) is provided in a vehicle width direction on the front surface of a front-bumper reinforcement (30). A front-bumper absorber (28) is provided in front of the optical fiber sensor (32), the front-bumper absorber (28) formed of a soft absorber (54) and a hard absorber (56). The hard absorber is disposed at the bumper center region where the thickness of the bumper is increased. Accordingly, the thickness of the soft absorber (54) becomes substantially uniform in the vehicle width direction, so that a substantially uniform load is inputted to the optical fiber sensor (32) regardless of the collision position of the bumper with an object. As a result, variations in the output of the load-sensing unit are reduced.