Airbag device for the body

摘要

An airbag device for the body instantaneously activates an airbag without malfunctions.;When an absolute value of an angular velocity detected by an angular velocity sensor exceeds a predetermined angular velocity value, angular velocity values are integrated from a most recent detected value to an oldest value within a predetermined time period, and if an absolute value of a resultant value of integral exceeds a predetermined value and an acceleration detected by an acceleration sensor is smaller than a predetermined acceleration, the airbag is inflated. Based on the value of the integral of the angular velocities, a case in which an angular velocity gradually increases is distinguished from a case in which an angular velocity momentarily increases, so the airbag device effectively prevents malfunctions caused by an action other than falling over. Additionally, because it is unnecessary to intentionally delay determination to prevent malfunctions, the airbag can instantaneously be inflated.

主权项

1. An airbag device for a body comprising:
an airbag mounted to cover a predetermined part of the body; an inflating device for inflating the airbag; an acceleration sensor for detecting an acceleration; an angular velocity sensor for detecting an angular velocity; an angular velocity storing device for storing angular velocity values detected by the angular velocity sensor; and a controlling device for, when an absolute value of an angular velocity detected by the angular velocity sensor becomes greater than a first predetermined value, integrating angular velocity values stored in the angular velocity storing device from a most recent detected value to an oldest value within a predetermined range, and for, if an absolute value of a resultant value of integral is greater than a second predetermined value and an absolute value of an acceleration detected by the acceleration sensor is smaller than a third predetermined value, inflating the airbag.