Patent ID: 8285484
Filing Date: 2012-10-09
Classification: G01C,G01S,G06Q,H02M,Y02B

Abstract:
1. A portable position acquisition apparatus, comprising: a position detection unit that detects position information pertaining to said position acquisition apparatus; a memory that stores the position information; a battery for providing power to said position acquisition apparatus; a motion monitoring unit that obtains motion information by monitoring motion of said position acquisition apparatus; a communication interface that enables said position acquisition apparatus to transmit data to a remote device via a wireless channel, the data being transmitted includes at least the position information; and a controller operatively connected to said position detection unit, said motion monitoring unit, said memory and said communication interface, said controller causing said position detection unit to reacquire the position information based on the motion information obtained by said motion monitoring unit and a battery level characteristic of said battery, wherein said controller determines a periodic basis at which said position detection unit is to reacquire the position information pertaining to said position acquisition apparatus, the periodic basis at which said position detection unit reacquires the position information varies depending on at least the battery level characteristic of said battery, wherein said position detection unit reacquires the position information in a manner dependent on whether said position acquisition apparatus is in motion, wherein said position detection unit does not reacquire the position information on the periodic basis when said position acquisition apparatus is deemed not in motion, wherein said position detection unit reacquires the position information in accordance with the periodic basis when said position acquisition apparatus is deemed in motion, wherein when said position acquisition apparatus is deemed to be in motion, then said communication interface transmits the data to the remote device periodically, and when said position acquisition apparatus is deemed not to be in motion, then said communication interface does not transmit the data to the remote device periodically, and wherein when said position acquisition apparatus is deemed to be in motion, then said position detection unit continues to reacquire the position information periodically but less frequently when the battery level characteristic indicates a reduced power level of said battery.