device for avkenning of a rorlig troghetskropps lege in a sekerhetssystem for vehicles

摘要

PCT No. PCT/SE85/00168 Sec. 371 Date Dec. 12, 1985 Sec. 102(e) Date Dec. 12, 1985 PCT Filed Apr. 12, 1985 PCT Pub. No. WO85/04627 PCT Pub. Date Oct. 24, 1985.A device for sensing the position of a movable inertia body in a vehicle safety system comprises a radiation emitting means (20) and a radiation detecting means (21) adapted to receive at least a portion of the emitted radiation. The inertia body (23) can be either in a neutral position in which the body does not activate the safety system, or in at least one working position in which the body activates the safety system, and is adapted to influence the radiation received by the detecting means (21) depending on its position, so that the radiation received by the detecting means indicates the position of the inertia body. The radiation emitting means (20) and the radiation detecting means (21) are positioned on opposite sides of the inertia means, and the radiation can be, for example, light passing through a hole (22) in the inertia body. Due to the fact that the radiation passes through a hole in the inertia body, a reliable indication of the position of the inertia body is obtained.