METHOD FOR CONTROLLING NAVIGATION DEVCIE AN NAVIGATION DEVCIE FOR EXECUTING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for controlling a navigation device of which the electric power consumption is optimally controlled according to a necessary level of activity and the navigation device for executing the method capable of being completely incorporated into a portable object such as a timer supplied with electric power by a battery or a rechargeable storage battery. SOLUTION: The method for controlling the navigation device is provided with a receiving means to receive navigation signals, a processing means which includes a processing device constituted so as to create measured values of location, velocity (v), and time i.e., PVT measured values and be operated at a first what is called normal operating frequency (fck1), and a time measuring means for creating the normal operating frequency (fck1) to control the navigation device such as a GPS receiver, a GLONASS receiver, a GALILEO receiver, or other revivers supplied with electric power by a battery or a rechargeable storage battery. The velocity (v) of the navigation device is measured, and the operating frequency (fck) of the processing device (18) is controlled at a plurality of what is called lowered operating frequencies (fck2-fck5) lower than the normal operating frequency (fck1) as the function of measured values of velocity (v).