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US 5,402,343 AGranted
Safety device for an automobile vehicle
AssigneesMazda Motor Corporation, Naldec Corporation
InventorsMineharu Shibata, Kenji Shodai, Junichi Miyawaki, Etsuko Yamamoto
Life of this patent
Estimating the term…
Abstract
A safety device for an automobile vehicle includes a first integration circuit for integrating an output value generated from a G sensor and a decision circuit for comparing the integrated value with a predetermined decision level to determine whether the safety device should be activated. In the first integration circuit, a previously integrated value is incrementally reduced to provide a current integrated value.
Claims19
A safety device for an automobile vehicle to protect an operator or a passenger, comprising:
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a predetermined decrement from a previously integrated value;
- and
- decision means for making decision to determine if said safety device is to be operated on the basis of said currently integrated value obtained by said integration means.
1 more element
A safety device for an automobile vehicle to protect an operator or a passenger, comprising
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a previously integrated value by a predetermined decrement from a previously integrated value;
- decision means for making decision to determine if said safety device is to be operated on the basis of said currently integrated value obtained by said integration means;
- and
- amplification means for amplifying the output value generated from said acceleration detecting means, prior to the integration by said integration means, at an amplification rate which is greater when the output value from said acceleration detecting means is less the predetermined value than when the output value from said acceleration detecting means less the predetermined value,
- wherein said amplification means is so set as to amplify the output value generated from said acceleration detecting means in an exponential fashion.
3 more elements
A safety device for an automobile vehicle to protect an operator or a passenger, comprising
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a previously integrated value by a predetermined decrement from a previously integrated value;
- decision means for making decision to determine if said safety device is to be operated on the basis of said currently integrated value obtained by computation with said integration means, wherein
- said integration means is set so as to give said currently integrated value (A) on the basis of formula as follows:
- A=Y+A'x.alpha.
- wherein
- A is the currently integrated value;
- is a current value detected currently by said acceleration detecting means;
- A' is a previously integrated value;
- and
- .alpha. is a decrement coefficient smaller than 1.
8 more elements
A safety device for an automobile vehicle to protect an operator or a passenger, comprising
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;.
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a previously integrated value by a predetermined decrement from a previously integrated value;
- decision means for making decision to determine if said safety device is to be operated on the basis of an integrated value obtained by computation with said integration means,
- wherein said integration means gives said currently integrated value (A) on the basis of formula as follows:
- A=Y+(A'-a)
- wherein
- A is the currently integrated value;
- Y is an output value generated from said acceleration detecting means;
- A' is a previously integrated value;
- and
- a is a decrement value greater than 0.
8 more elements
A safety device for an automobile vehicle to protect an operator or a passenger, comprising
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a previously integrated value by a predetermined decrement from a previously integrated value;
- decision means for making decision to determine if said safety device is to be operated on the basis of said currently integrated value obtained by said integration means;
- wherein said integration means further comprises first and second integration means, and said first integration means is set to make a rate of decreasing a previously integrated value larger than said second integration means, wherein
- said first integration means is set so as to give said currently integrated value (A) on the basis of formula (1) as follows:
- A=Y+A'x.alpha. (1)
- wherein
- A is the currently integrated value;
- Y is a current value detected currently by said acceleration detecting means;
- A' is a previously integrated value;
- and
- .alpha. is a decrement coefficient smaller than 1;
- and said second integration means is set so as to give said currently integrated value (B) on the basis of formula (2) as follows:
- B=Z+B'x.beta. (2)
- wherein B is the currently integrated value;
- Z is a current value detected currently by
- said acceleration detecting mean;
- B' is a previously integrated value;
- and
- .beta. is a decrement coefficient smaller than 1
- and equal to or greater than the decrement coefficient .alpha.(0<.alpha.<.beta.1).
18 more elements
(Amended) A safety device for an automobile vehicle to protect an operator or a passenger, comprising
- acceleration detecting means mounted to a body of the automobile vehicle for detecting a magnitude of longitudinal acceleration acting longitudinally upon the body thereof;
- integration means for integrating an output value generated from said acceleration detecting means so as to give a currently integrated value by adding a current output detected by said acceleration detecting means to a value obtained by decreasing a previously integrated value by a predetermined decrement from a previously integrated value;
- decision means for making decision to determine if said safety device is to be operated on the basis of said currently integrated value obtained by said integration means;
- wherein said integration means further comprises first and second integration means, and said first integration means is set to make a rate of decreasing a previously integrated value larger than said second integration means, wherein
- said first integration means gives said currently integrated value (A) on the basis of formula (3) as follows:
- A=Y+(A'-b) (3)
- wherein
- A is the currently integrated value;
- Y is an output value generated from said acceleration detecting means;
- A' is a previously integrated value;
- and
- a is a decrement value greater than 0;
- and said second integration means gives said currently integrated value (B) on the basis of formula (4) as follows:
- B=Z+(B'-b) (4)
- wherein
- B is the currently integrated value;
- Z is a current value detected currently by said acceleration detecting mean;
- B' is a previously integrated value;
- and
- b is a decrement value equal to or greater than 0 and smaller than the decrement value a (0b<a) .
17 more elements
Dependencies are inferred from the claim text.