Airbag start-up decision apparatus for motorcycle
First Claim
1. An airbag start-up decision apparatus for a motorcycle that carries out a start-up decision of whether or not an airbag provided on the motorcycle is to be started up, whereinan acceleration, which is an output value of an acceleration sensor attached to the motorcycle is second-order-integrated, for a predetermined integration interval to calculate a displacement, and based on a fact that, upon application to a graph wherein the displacement is taken on the axis of abscissa and the output value is taken on the axis of ordinate, a waveform obtained upon collision exists only in the first quadrant while a waveform obtained in any other case than collision appears in a quadrant different from the first quadrant, it is decided whether or not a state of the motorcycle is that upon collision or that in any other case than collision,wherein the waveform obtained upon collision exists only in the first quadrant while a waveform obtained upon going over a road step and upon traveling on a rough road appears in the second and fourth quadrants, it is decided whether or not the state of the motorcycle is that upon collision or that upon going over a road step or upon traveling on a rough road,wherein the airbag start-up decision apparatus includes:
- a main decision device for carrying out a main decision based on the output value of the acceleration sensor,a safing decision device for carrying out a safing decision based on the output value of the acceleration sensor, andthe start-up decision of the airbag being carried out based on the main decision and the safing decision.
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Accused Products
Abstract
A safing decision is executed using a first integrator for integrating acceleration sensor output values for a first integration interval to obtain a first arithmetic operation value, a second integrator for cumulative integration of the acceleration sensor output values using it as a trigger that the first arithmetic operation value exceeds a first predetermined value to obtain a second arithmetic operation value, a third integrator for integrating the second arithmetic operation value for a third integration interval to obtain a third arithmetic operation value as a second order integration value of the output values of the acceleration sensors, and a comparator for comparing a map derivation value derived by substituting the third arithmetic operation value into a threshold value map and the first arithmetic operation value with each other. The airbag is started up when the main decision and the safing decision are carried out as an on decision.
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Citations
9 Claims
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1. An airbag start-up decision apparatus for a motorcycle that carries out a start-up decision of whether or not an airbag provided on the motorcycle is to be started up, wherein
an acceleration, which is an output value of an acceleration sensor attached to the motorcycle is second-order-integrated, for a predetermined integration interval to calculate a displacement, and based on a fact that, upon application to a graph wherein the displacement is taken on the axis of abscissa and the output value is taken on the axis of ordinate, a waveform obtained upon collision exists only in the first quadrant while a waveform obtained in any other case than collision appears in a quadrant different from the first quadrant, it is decided whether or not a state of the motorcycle is that upon collision or that in any other case than collision, wherein the waveform obtained upon collision exists only in the first quadrant while a waveform obtained upon going over a road step and upon traveling on a rough road appears in the second and fourth quadrants, it is decided whether or not the state of the motorcycle is that upon collision or that upon going over a road step or upon traveling on a rough road, wherein the airbag start-up decision apparatus includes: -
a main decision device for carrying out a main decision based on the output value of the acceleration sensor, a safing decision device for carrying out a safing decision based on the output value of the acceleration sensor, and the start-up decision of the airbag being carried out based on the main decision and the safing decision. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification