Impact sensing and identification system for pedestrian protection device
First Claim
1. A system for identifying an object impacting a vehicle bumper during a collision, the system comprising:
- a plurality of sensors including a left-side sensor positioned near a left side of the vehicle bumper, a right-side sensor positioned near a right side of the vehicle bumper, and a middle sensor positioned near the middle of the vehicle bumper;
a processor; and
a memory storing instructions that, when executed by the processor, cause the system toreceive acceleration values from each of the plurality of sensors,calculate a center strength value of an impact based on the acceleration values, the center strength value being indicative of an amount of force that is applied to a middle location of the vehicle bumper,determine an impact location on the vehicle bumper based at least in part on the acceleration values,calculate a normalized intrusion value based on the center strength value, the impact location, and a bumper stiffness factor, the bumper stiffness factor being indicative of the stiffness of the bumper at the impact location, andidentify the object impacting the vehicle bumper based on the normalized intrusion value.
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Accused Products
Abstract
A system for identifying an object impacting a vehicle bumper during a collision. The system receives acceleration values from each of a plurality of sensors and calculates a center strength value based on the acceleration values. The center strength value is indicative of the amount of force that is applied to the center of the vehicle bumper. The system then determines a preliminary impact location on the vehicle bumper based at least in part on the acceleration values. A normalized intrusion value is calculated based on the center strength value, the impact location, and a bumper stiffness factor. The bumper stiffness factor is indicative of the stiffness of the bumper at the impact location. The system then identifies the object impacting the vehicle bumper based at least in part on the normalized intrusion value.
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Citations
8 Claims
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1. A system for identifying an object impacting a vehicle bumper during a collision, the system comprising:
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a plurality of sensors including a left-side sensor positioned near a left side of the vehicle bumper, a right-side sensor positioned near a right side of the vehicle bumper, and a middle sensor positioned near the middle of the vehicle bumper; a processor; and a memory storing instructions that, when executed by the processor, cause the system to receive acceleration values from each of the plurality of sensors, calculate a center strength value of an impact based on the acceleration values, the center strength value being indicative of an amount of force that is applied to a middle location of the vehicle bumper, determine an impact location on the vehicle bumper based at least in part on the acceleration values, calculate a normalized intrusion value based on the center strength value, the impact location, and a bumper stiffness factor, the bumper stiffness factor being indicative of the stiffness of the bumper at the impact location, and identify the object impacting the vehicle bumper based on the normalized intrusion value. - View Dependent Claims (2, 3, 4)
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5. A method of identifying an object impacting a vehicle bumper during a collision, the method comprising:
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receiving acceleration values from each of a plurality of sensors, the plurality of sensors including a left-side sensor positioned near a left side of the vehicle bumper, a right-side sensor positioned near a right side of the vehicle bumper, and a middle sensor positioned near a middle of a vehicle bumper; calculating a center strength value of an impact based on the acceleration values, the center strength value being indicative of an amount of force that is applied to the middle location of the vehicle bumper, determining an impact location on the vehicle bumper based at least in part on the acceleration values; determining a bumper stiffness factor; calculating a normalized intrusion value based on the center strength value, the impact location, and the bumper stiffness factor, and identifying the object impacting the vehicle bumper based on the normalized intrusion value. - View Dependent Claims (6, 7, 8)
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Specification