Mobile object communication and position determination

Details Mobile object communication and position determination Mobile object communication and position determination

2011-06-28

2011-06-28

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

Reexamination Certificate

active

07969820

ABSTRACT:
An ultrasound position determination system includes a base unit and at least one mobile unit. Each of the mobile and base units are operable to transmit and receive ultrasonic signals. The mobile unit is adapted to transmit a predetermined signal in dependence upon the state of transmission of the base unit. The base unit is adapted to determine the time taken for the signal to pass from the mobile unit to the base unit and thereby calculate a distance between the mobile unit and the base unit.

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patent: WO 2006/013512 (2006-02-01), None
patent: WO 2008/129295 (2008-10-01), None

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