Method and apparatus for recording the rotation angle of a vehicle
First Claim
1. A method for recording the rotation angles of a vehicle comprising the steps of:
- measuring an angular velocity of the vehicle;
integrating the measured angular velocity across a predetermined unit of time to calculate a differential rotation angle in unit of time;
storing the differential rotation angle in a buffer; and
when a vehicle accident is detected, recording in a recording device a plurality of differential rotation angles stored in the buffer across a predetermined recording time before and after the accident.
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Accused Products
Abstract
An apparatus for recording the rotation angle of a vehicle comprises an angular velocity sensor adapted to measure an angular velocity ω of the vehicle, an integrator adapted to integrate the measured angular velocity ω across a predetermined unit of time Δt to calculate a differential rotation angle Δα in unit of time Δt, a ring buffer adapted to store the differential rotation angles Δαan acceleration sensor adapted to detect that an accident occurred with the vehicle, and a nonvolatile recording device adapted to record, when an accident is detected by the acceleration sensor, the differential rotation angles ΔαM . . . ΔαM+N−1 stored in the ring buffer, across a predetermined recording time T before and after the accident.
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Citations
10 Claims
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1. A method for recording the rotation angles of a vehicle comprising the steps of:
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measuring an angular velocity of the vehicle; integrating the measured angular velocity across a predetermined unit of time to calculate a differential rotation angle in unit of time; storing the differential rotation angle in a buffer; and when a vehicle accident is detected, recording in a recording device a plurality of differential rotation angles stored in the buffer across a predetermined recording time before and after the accident. - View Dependent Claims (2, 3, 9)
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4. An apparatus for recording rotation angles of a vehicle comprising:
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an angular velocity sensor for measuring an angular velocity of the vehicle; an integrator for integrating the measured angular velocity across a predetermined unit of time to calculate a differential rotation angle in unit of time; a buffer for storing a plurality of differential rotation angles; an accident sensor for detecting vehicle accidents; and a recording device for recording, when an accident is detected by the accident sensor, the plurality of differential rotation angles stored in the buffer across a predetermined recording time before and after the accident. - View Dependent Claims (5, 6, 7, 8, 10)
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Specification