Activation device for passenger protection apparatus
First Claim
1. An activation device for a passenger protection apparatus which is made to activate said passenger protection apparatus in accordance with a behavior of a vehicle, comprising:
- an angular velocity sensor for detecting a roll angular velocity of said vehicle;
relative angle calculating means for calculating a roll relative angle of said vehicle on the basis of the roll angular velocity detected by said angular velocity sensor;
roll judging means for making a judgment indicating the occurrence of a roll of said vehicle when the roll angular velocity detected by said angular velocity sensor and the vehicle roll relative angle calculated by said relative angle calculating means satisfy a predetermined threshold condition;
drive control means for activating said passenger protection apparatus when said roll judging means makes the vehicle roll judgment;
state detecting means having at least one of a window opening/closure sensor for detecting an open/closed state of a window of said vehicle and a buckle switch for detecting a wearing state of a seat belt; and
threshold setting means for setting said predetermined threshold condition on the basis of a result of the detection by said state detecting means.
1 Assignment
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Accused Products
Abstract
An activation device for a passenger protection apparatus comprises a sensor for detecting a roll angular velocity, a unit for calculating a roll relative angle on the basis of the angular velocity, and a unit for making a judgment indicating a roll of the vehicle when the velocity and the angle satisfy a threshold condition. A control unit activates an air bag and a pretentioner at a roll judgment. A buckle switch detects a wearing state of a seat belt, and a window opening/closure sensor detects an open/closed state of a window. The threshold condition is set on the basis of the results of the detection of the buckle switch and the window opening/closure sensor. This enables the protection apparatus to be appropriately activated on the basis of a wearing state of the seat belt and an open/closed state of the window of the vehicle.
11 Citations
9 Claims
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1. An activation device for a passenger protection apparatus which is made to activate said passenger protection apparatus in accordance with a behavior of a vehicle, comprising:
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an angular velocity sensor for detecting a roll angular velocity of said vehicle;
relative angle calculating means for calculating a roll relative angle of said vehicle on the basis of the roll angular velocity detected by said angular velocity sensor;
roll judging means for making a judgment indicating the occurrence of a roll of said vehicle when the roll angular velocity detected by said angular velocity sensor and the vehicle roll relative angle calculated by said relative angle calculating means satisfy a predetermined threshold condition;
drive control means for activating said passenger protection apparatus when said roll judging means makes the vehicle roll judgment;
state detecting means having at least one of a window opening/closure sensor for detecting an open/closed state of a window of said vehicle and a buckle switch for detecting a wearing state of a seat belt; and
threshold setting means for setting said predetermined threshold condition on the basis of a result of the detection by said state detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An activation device for a passenger protection apparatus which is made to activate said passenger protection apparatus in accordance with a behavior of a vehicle, comprising:
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roll judging means for detecting said behavior of said vehicle to make a judgment indicating the occurrence of a roll of said vehicle when said vehicle behavior detected satisfies a predetermined condition;
drive control means for activating said passenger protection apparatus when said roll judging means makes a judgment indicating the occurrence of a roll of said vehicle;
state detecting means having at least one of a window opening/closure sensor for detecting an open/closed state of a window of said vehicle and a buckle switch for detecting a wearing state of a seat belt; and
threshold setting means for setting said predetermined condition on the basis of a result of the detection by said state detecting means.
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Specification