Acceleration detector and passive safety device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorToshiyuki Yamashita
Life of this patent
Estimating the term…
Abstract
By using an acceleration detector 51 incorporating mass members respectively capable of detecting impact acceleration applied from different directions, the impact acceleration applied on the vehicle from the different directions is detected with one acceleration detector. The installation space of the acceleration detector in a car compartment sensor unit 6 is reduced. Moreover, the increases in costs and weight are suppressed.
Claims15
An acceleration detector for detecting impact acceleration from an amount of displacement of a mass member constructed to be displaced according to an applied impact acceleration, comprising:
- a mass member arranged to be displaced in a direction corresponding to each of the impact accelerations applied in two directions, by an amount of displacement corresponding to the size of the impact acceleration from a predetermined position;
- and
- detection means for detecting a state of displacement of the mass member by a predetermined amount or more as a keying signal and outputting the keying signal.
A passive safety device for detecting impact acceleration applied to a vehicle by an acceleration detector, and protecting an occupant by an air bag, comprising:
- a car compartment sensor for detecting the impact acceleration in a car compartment by use of said acceleration detector, said acceleration detector comprising a mass member arranged to be displaced in a direction corresponding to each of the impact accelerations applied in two directions, and displaced from a predetermined position corresponding to the size of the impact acceleration, and detection means for detecting a state of displacement of the mass member by a predetermined amount or more as a keying signal and outputting the keying signal;
- a vehicle side sensor for detecting impact acceleration applied to a side of the vehicle;
- and
- a control unit for performing judgement control for development of the air bag based on the impact acceleration detected by the car compartment sensor, and impact acceleration applied to the side of the vehicle and detected by the vehicle side.
Dependencies are inferred from the claim text.