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US 2006/0131900 A1Published application
Vehicle systems and methods for detecting pedestrian impacts
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsYan Lu, Xinlin Qing, Chang Zhang, Irene Li
Life of this patent
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Abstract
Systems and methods for pedestrian impact detection are provided. Piezoelectric sensor elements detect an object impacting a vehicle. The detected signal is attenuated and filtered. The attenuated and filtered signal is analyzed in the frequency domain to determine whether the object which impacted the vehicle is a pedestrian. If the object which impacted the vehicle is a pedestrian, then a pedestrian protection system is deployed.
Claims21
A system, comprising:
- a piezoelectric sensor;
- a filter coupled to the piezoelectric sensor, wherein the filter produces a filtered signal by removing predetermined frequency signals from a signal received from the piezoelectric sensor;
- and
- an object type identification circuit coupled to the filter, wherein the object type identification circuit identifies whether a particular type of object has impacted on the piezoelectric sensor based on an analysis of the filtered signal.
1 more element
A method for identifying a type of object impact, the method comprising the acts of:
- receiving an object impact signal;
- filtering predetermined frequencies from the object impact signal to produce a filtered signal;
- identifying a type of object impact based on an analysis of the filtered signal.
A system, comprising:
- a piezoelectric sensor;
- means for filtering a signal from the piezoelectric sensor to produce a filtered signal;
- and
- means for identifying whether a particular type of object has impacted on the piezoelectric sensor based on an analysis of the filtered signal.
1 more element
Dependencies are inferred from the claim text.