Distributed electronic acceleration sensing for crash severity recognition
First Claim
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1. A crash detection system comprising:
- a plurality of sensors located at different points of a vehicle, at least two of said plurality of sensors making measurements relating to velocity at a first point and at a second point in a forward direction of travel and at least two of said plurality of sensors making measurements relating to velocity along a direction of travel transverse to forward travel at a third point and at a fourth point; and
an evaluation unit for reading and comparing the measurements of said plurality of sensors to determine a severity of a vehicle crash by examining a difference in the measurements from said plurality of sensors wherein the difference comprises a comparison of a first rate of movement of the first point of the vehicle compared with a second rate of movement of the second point of the vehicle along the forward direction and a comparison of a third rate of movement of the third point of the vehicle with a fourth rate of movement of the fourth point of the vehicle along the direction transverse to the forward direction.
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Abstract
The crash detection system employs a plurality of electronic acceleration sensors distributed at different locations of a vehicle body. The plurality of electronic acceleration sensors measures changes in acceleration of the vehicle body at different locations and therefore the rate of deformation of the vehicle body. The signals from the plurality of electronic acceleration sensors are filtered, amplified, and passed to an evaluation unit, which reads and compares the signals. Based on the rate of deformation of the vehicle body, the evaluation unit then makes a determination of the severity of the vehicle crash and communicates this information to a passenger safety system.
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Citations
9 Claims
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1. A crash detection system comprising:
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a plurality of sensors located at different points of a vehicle, at least two of said plurality of sensors making measurements relating to velocity at a first point and at a second point in a forward direction of travel and at least two of said plurality of sensors making measurements relating to velocity along a direction of travel transverse to forward travel at a third point and at a fourth point; and
an evaluation unit for reading and comparing the measurements of said plurality of sensors to determine a severity of a vehicle crash by examining a difference in the measurements from said plurality of sensors wherein the difference comprises a comparison of a first rate of movement of the first point of the vehicle compared with a second rate of movement of the second point of the vehicle along the forward direction and a comparison of a third rate of movement of the third point of the vehicle with a fourth rate of movement of the fourth point of the vehicle along the direction transverse to the forward direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for detecting the severity of a vehicle crash comprising:
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providing a network of acceleration sensors at different points of a vehicle;
reading a first measurement relating to velocity at a first point and a second measurement relating to velocity at a second point from the acceleration sensors;
reading a third measurement relating to velocity at a third point and a fourth measurement relating to velocity at a fourth point;
comparing the first measurement and the second measurement generated by the acceleration sensors;
comparing the third measurement and the fourth measurement generated by the acceleration sensors; and
determining a severity of a vehicle crash based on a difference in measurements between the first measurement and the second measurement and between the third measurement and the fourth measurement. - View Dependent Claims (9)
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Specification