Patent ID: 6411875
Filing Date: 2002-06-25
Classification: B60R,E05B

Abstract:
An automatic door lock releasing apparatus comprising:a plurality of acceleration sensors for detecting acceleration in a plurality of directions; a plurality of decelerating direction integrating means each provided in correspondence with one of said plurality of acceleration sensors for integrating a deceleration signal of an accelerating direction within a specified sampling time, said acceleration signal being included in each of acceleration signals of the plurality of directions obtained from said plurality of acceleration sensors; a plurality of accelerating direction integrating means each provided in correspondence with one of said plurality of acceleration sensors for integrating a signal of an accelerating direction within a specified sampling time, said signal being included in each of acceleration signals of said plurality of directions obtained from said plurality of acceleration sensors; a plurality of first coefficient means each provided in correspondence with one of said plurality of acceleration sensors for weighting an output of said accelerating direction integrating means by multiplying it by a specified coefficient; a plurality of subtracting means each provided in correspondence with one of said plurality of acceleration sensors for determining a velocity signal by subtracting said integral value outputted from said first coefficient means from said integral value outputted from said decelerating direction integrating means; an arithmetic processing means for receiving a plurality of velocity signals outputted from said plurality of subtracting means and determining a resultant velocity of said plurality of velocity signals; and a signal generating means for comparing said resultant velocity outputted from said arithmetic processing means with a specified threshold value and generating and outputting a start signal when said resultant velocity exceeds said specified threshold value.