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US 6,644,688 B1Granted
Crash sensing system
AssigneeAutomotive Systems Labortory, Inc.
InventorsJialou Hu, Gopal Narwani
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AssigneeAutomotive Systems Labortory, Inc.
InventorsJialou Hu, Gopal Narwani
Estimating the term…
The severity of a crash is discriminated from a measure of relative motion of first and second elements of a vehicle, wherein an initial time is recorded when a variable point in the associated phase space of relative velocity and relative displacement crosses a first threshold boundary, and a safety restraint actuator is actuated if a subsequent time when the variable point crosses a second threshold boundary is within threshold period following the initial time. In accordance with another aspect, a type of impacting object is discriminated from a first measure of relative motion at a first location, and a crash severity is discriminated from a second measure of relative motion at a second location, wherein the relative motion at the first location is unipolar for one type of crash and bipolar for another, and the relative motion at the second location is unipolar for both types of crashes. The second threshold boundary can be responsive to discrimination of the type of impacting object by the first relative motion sensor.
A vehicle crash sensing system, comprising a first relative motion sensor operatively coupleable to the vehicle proximate to a first location, wherein when operatively coupled to the vehicle, said first relative motion sensor is responsive to a first relative motion of a first element of the vehicle with respect to a second element of the vehicle proximate to said first location, and said first location is adapted so that said first relative motion proximate to said first location is unipolar for at least one type of crash, and said first relative motion proximate to said first location is bipolar for at least another type of crash.
A vehicle crash sensing system, comprising:
A method of sensing a vehicle crash, comprising:
A method of sensing a vehicle crash, comprising:
A vehicle crash sensor, comprising a bar code relative motion sensor operatively coupled to the vehicle, wherein said bar code relative motion sensor is adapted to measure a relative motion of a first element of the vehicle relative to a second element of the vehicle, said second element is adapted to be proximate to said first element, and said relative motion is responsive to a crash involving either said first element or said second element of said vehicle.
Dependencies are inferred from the claim text.