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US 6,636,791 B2Granted
Collision record apparatus, collision state estimation method, and record medium
AssigneeCalsonic Kansei Corporation
InventorTakeo Okada
Life of this patent
Estimating the term…
Abstract
A collision recording apparatus records times in a memory, when a collision waveform provided accompanying a collision of a mobile unit and a waveform derived from the collision waveform reach predetermined values. The collision recording apparatus also records waveform types in association with the times, respectively.
Claims8
A collision record apparatus comprising:
- means for judging that a collision waveform due to a collision of a mobile unit and a waveform derived from the collision waveform reach predetermined thresholds, respectively;
- and
- means for recording times, at which the collision waveform and the waveform derived therefrom reach the predetermined thresholds, in memory in association with waveform types,
- wherein the times are elapsed times from a time at which the collision waveform exceeds a reference value to a time at which the collision waveform or waveform derived therefrom reach the threshold value.
1 more element
A record medium recording a computer program and information therein,
- wherein the information comprises:
- times, at which a collision waveform provided accompanying a collision of a mobile unit and a waveform derived from the collision waveform reach predetermined values;
- and
- waveform types in association with the times;
- and
- wherein the computer program is for performing a method of estimating a collision, the computer program including a plurality of computer executable instructions, wherein the instructions, when executed by the computer, cause the computer to perform the steps of:
- reading the times for each of the waveform types as required;
- comparing the read contents with provided experimental data;
- and
- estimating a situation when the collision occurs.
7 more elements
A collision estimation method comprising the steps of:
- starting time-counting based on a timing at which a collision waveform provided accompanying a collision exceeds a predetermined reference value;
- calculating a time when a waveform derived from the collision waveform exceeds a predetermined threshold value for the waveform based on the counted time;
- recording the calculated time in a record medium in association with waveform types;
- reading the time recorded on the record medium for each waveform type as required;
- comparing the read contents with provided experimental measurement data;
- and
- estimating a situation when the collision occurring.
4 more elements
A collision record apparatus comprising:
- an acceleration sensor for measuring an acceleration signal of a mobile unit upon a collision occurring;
- a trigger circuit for outputting a trigger signal according to the acceleration signal received from acceleration sensor;
- a threshold circuit for outputting a threshold value in response to reception of the trigger signal;
- a judgment circuit for outputting an judgment signal upon exceeding the threshold value;
- a timer for counting a time period from the output of the trigger signal to the output of the judgment signal;
- and
- a memory for recording the judgment signal and the time.
4 more elements
Dependencies are inferred from the claim text.