Automotive motion recorder
First Claim
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1. A method to provide vehicle impact data, comprising:
- A. providing a motion recorder comprising;
a case;
a first accelerometer oriented to sense acceleration in the direction of vehicle travel;
a second accelerometer oriented to sense acceleration perpendicular to the direction of travel;
a speed sensor to sense vehicle speed;
first means for transferring acceleration data from both accelerometers to a circular non-volatile memory circuit when the speed sensor senses a speed above a preset value;
second means for transmitting date/time data to the memory;
third means for transmitting vehicle speed data from the speed sensor to the memory;
whereby the accelerometers, speed sensor, and first, second and third means are located in the case;
B. attaching the recorder to the vehicle, the vehicle further comprising either an automobile, motorcycle, truck or bus equipped with an antilock brake system; and
,C. subsequent to vehicle impact, removing the recorder from the vehicle, connecting the recorder and using a predetermined access code for retrieving the acceleration data from both accelerometers, the vehicle speed and date/time data for subsequent analysis.
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Abstract
A device is disclosed which records the information necessary for a determination of the pre-impact speeds and the impact speed of a motor vehicle involved in a collision. Following an accident, the unit may be removed and connected to a personal computer as a reader. With entry of the proper access code, the data pointer outputs the stored information in the correct sequence for analysis.
72 Citations
1 Claim
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1. A method to provide vehicle impact data, comprising:
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A. providing a motion recorder comprising;
a case;
a first accelerometer oriented to sense acceleration in the direction of vehicle travel;
a second accelerometer oriented to sense acceleration perpendicular to the direction of travel;
a speed sensor to sense vehicle speed;
first means for transferring acceleration data from both accelerometers to a circular non-volatile memory circuit when the speed sensor senses a speed above a preset value;
second means for transmitting date/time data to the memory;
third means for transmitting vehicle speed data from the speed sensor to the memory;
whereby the accelerometers, speed sensor, and first, second and third means are located in the case;B. attaching the recorder to the vehicle, the vehicle further comprising either an automobile, motorcycle, truck or bus equipped with an antilock brake system; and
,C. subsequent to vehicle impact, removing the recorder from the vehicle, connecting the recorder and using a predetermined access code for retrieving the acceleration data from both accelerometers, the vehicle speed and date/time data for subsequent analysis.
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Specification