Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Reexamination Certificate
2011-03-15
2011-03-15
Pihulic, Dan (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
Reexamination Certificate
active
07907475
ABSTRACT:
An obstacle detecting system for a vehicle detects an obstacle by transmitting a transmitting wave and receiving a receiving wave, which is a reflection of the transmitting wave by the obstacle. The system calculates a distance to the obstacle. The system varies directivity of the transmitting wave in accordance with the calculated distance. The directivity is lowered when the calculated distance is less than a predetermined reference distance, than when the calculated distance is greater than the predetermined reference distance.
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Denso Corporation
Nixon & Vanderhye PC
Pihulic Dan
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