Patent EP0709255A1 successfully refreshed from Google Patents.
EP0709255A1
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Occupant restraint system actuated by a simple operation using a feature value
Assignee: Toyota Motor Corp
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Filing: 1995-10-24
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Granted: —
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Expires: 2015-10-24
Abstract
Abstract An occupant restraint system (10) is disclosed in which a determination on the actuation of the system is made by a simple calculation. A first feature value is extracted from a first component of acceleration caused by an external force exerted on a vehicle (12) in a first direction, the first feature value representing a first vector of the external force with respect to the first direction. A second feature value is extracted from a second component of the acceleration in a second direction, the second feature value representing a second vector of the external force with respect to the second direction. A magnitude and a direction of a synthesized vector is obtained by synthesizing the first vector and the second vector. A projective magnitude of a projective vector is obtained from the synthesized vector, the projective vector being a vector which is a projection of the synthesized vector with respect to a predetermined direction. Actuation of the restraining means is determined by comparing the projective magnitude with a predetermined threshold value so that the restraining means is actuated when the projective magnitude is greater than the predetermined threshold value.
Inventors
- 👤 Motomi Iyoda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/013; B60R21/0132; B60R21/01332; B60R21/01338; B60R21/02; B60R21/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
170 words
An occupant restraint system (10) for a vehicle (12), an acceleration being generated on said vehicle when an external force is exerted on said vehicle, said occupant restraint system comprising: restraining means (M5) for restraining a passenger in said vehicle when said external force exceeds a predetermined value; external force assuming means (M1, M2, M3) for assuming a magnitude and a direction of the external force exerted on said vehicle; projective magnitude calculating means (M4) for calculating a projective magnitude of a projective vector obtained from an external force vector corresponding to the external force, said external force vector obtained from the magnitude and the direction assumed by said external force assuming means, said projective vector being a projection of said external force vector with respect to a predetermined direction; and actuation determining means (M6) for determining actuation of said restraining means by comparing said projective magnitude with a predetermined threshold value so that said restraining means is actuated when said projective magnitude is greater than said predetermined threshold value.
Claim 2
Dependent Claim
141 words
The occupant restraint system as claimed in claim 1, wherein said external force assuming means comprises: first feature value extracting means (M1) for extracting a first feature value from a first component of said acceleration in a first direction, said first feature value representing a first vector of said external force with respect to said first direction; second feature value extracting means (M2) for extracting a second feature value from a second component of said acceleration in a second direction different from said first direction, said second feature value representing a second vector of said external force with respect to said second direction; and synthesized vector calculating means (M3) for calculating a magnitude and a direction of a synthesized vector which is obtained by synthesizing said first vector and said second vector, said synthesized vector corresponding to said external force vector.
Claim 3
Dependent Claim
39 words
The occupant restraint system as claimed in claim 2 wherein said first feature value and said second feature value are extracted by integration of said first component and said second component of said acceleration with respect to time, respectively.
Claim 4
Dependent Claim
49 words
The occupant restraint system as claimed in claim 2, wherein said first feature value and said second feature value are extracted by n times integration of said first component and said second component of said acceleration with respect to time, where the n is an integer greater than 1.
Claim 5
Dependent Claim
37 words
The occupant restraint system as claimed in claim 2, wherein said first feature and said second feature are extracted by interval integral on said first component and said second component of said acceleration with respect to time.
Claim 6
Dependent Claim
35 words
The occupant restraint system as claimed in claim 2, wherein said first direction corresponds to a front-to-rear direction of said vehicle (12) and said second direction corresponds to a side-to-side direction of said vehicle (12).
Claim 7
Dependent Claim
74 words
The occupant restraint system as claimed in claim 2, wherein said projective magnitude calculating means (M4) calculates said projective magnitude for a plurality of predetermined directions, and said actuation determining means (M6) compares each calculated projective magnitude with the corresponding threshold value determined for each of said predetermined directions, a determination to actuate said restraining means being made when said projective magnitude exceeds the corresponding threshold value at any one of said predetermined directions.
Claim 8
Dependent Claim
42 words
The occupant restraint system as claimed in claim 7, wherein said predetermined directions are defined in a range from minus 90 degrees to plus 90 degrees with respect to a front-to-rear direction of said vehicle (12), said range divided into uniform intervals.
Claim 9
Dependent Claim
15 words
The occupant restraint system as claimed in claim 8, wherein said intervals are 15 degrees.
Claim 10
Dependent Claim
148 words
An occupant restraint system for a vehicle (12), an acceleration being generated on said vehicle when an external force is exerted on said vehicle, said occupant restraint system comprising: restraining means (M5) for restraining a passenger in said vehicle when said external force exceeds a predetermined value; first feature value extracting means (M7) for extracting a first feature value from a first component of said acceleration in a first direction; second feature value extracting means (M9) for extracting a second feature value from a second component of said acceleration in a second direction different from said first direction,; actuation determining means (M8) for determining actuation of said restraining means when said first feature value is greater than a predetermined threshold value; and threshold value changing means (M10) for changing said predetermined threshold value to an appropriate value in accordance with an absolute value of said second feature value.
Claim 11
Dependent Claim
33 words
The occupant restraint system as claimed in claim 10, wherein said first direction is a front-to-rear direction of said vehicle (12), and said second direction is a side-to-side direction of said vehicle (12).
Claim 12
Dependent Claim
26 words
The occupant restraint system as claimed in claim 10, wherein said threshold value is decreased as an absolute value of said second feature value is increased.
Claim 13
Dependent Claim
76 words
The occupant restraint system as claimed in claim 10, wherein said threshold value changing means (M10) includes means for providing determination information for predetermined values of said first feature value, said determination information indicating a result of comparison performed on said predetermined values of said first feature value with said predetermined threshold value, said actuation determining means (M8) determines the actuation of said restraining means (M5) in accordance with said result indicated by said determination information.
References Cited (Backward Citations)
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