GPS receiving apparatus
First Claim
1. A GPS receiving apparatus comprising:
- time counting means for counting time and generating a reference clock signal;
input means for controlling the beginning of a GPS signal receiving operation;
GPS signal receiving means mountable on a user'"'"'s arm for receiving a GPS signal from a GPS satellite;
display means for displaying time information output by the time counting means and at least one of position information and speed information based upon an output of the GPS signal receiving means;
arm swing detecting means for detecting periodic arm swinging motion of the user'"'"'s arm while walking or running and outputting a corresponding periodic signal;
timing setting means for setting a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting means; and
position location control means for controlling operation timing of the GPS signal receiving means based on the output signal of the timing setting means so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion.
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Accused Products
Abstract
An improved GPS receiving apparatus may be worn on a user'"'"'s arm and is not affected by the user'"'"'s periodic arm swinging motion. A GPS signal receiver receives a GPS signal from GPS satellites, the receiver being mountable on a user'"'"'s arm. A display is provided for displaying information based upon an output of the GPS signal receiver. An arm swing detecting circuit including an acceleration sensor detects the periodic swinging motion of the user'"'"'s arm and outputs a corresponding periodic signal. A timing circuit sets a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting circuit. Operation timing of the GPS signal receiver is performed based on the output signal of the timing circuit so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion.
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Citations
20 Claims
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1. A GPS receiving apparatus comprising:
- time counting means for counting time and generating a reference clock signal;
input means for controlling the beginning of a GPS signal receiving operation;
GPS signal receiving means mountable on a user'"'"'s arm for receiving a GPS signal from a GPS satellite;
display means for displaying time information output by the time counting means and at least one of position information and speed information based upon an output of the GPS signal receiving means;
arm swing detecting means for detecting periodic arm swinging motion of the user'"'"'s arm while walking or running and outputting a corresponding periodic signal;
timing setting means for setting a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting means; and
position location control means for controlling operation timing of the GPS signal receiving means based on the output signal of the timing setting means so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion. - View Dependent Claims (2, 3, 4, 10, 11, 12, 13, 14, 15, 16)
- time counting means for counting time and generating a reference clock signal;
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5. A GPS receiving apparatus comprising;
- time counting means for counting time and generating a reference clock signal;
input means for controlling the beginning of a GPS signal receiving operation;
GPS signal receiving means mountable on a user'"'"'s arm for receiving a GPS signal from a GPS satellite;
display means for displaying time information output by the time counting means and at least one of position information and speed information based on an output of the GPS signal receiving means;
arm swing detecting means for detecting periodic arm swinging motion of the user'"'"'s arm while walking or running and outputting a corresponding periodic signal;
timing setting means for setting a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting means; and
position location control means for controlling operation timing of the GPS signal receiving means based on the output signal of the timing setting means and a clock signal from the time counting means so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion; and
optimum receiving state detecting means for conducting an optimum receiving state detecting operation to determine an optimum timing for operation of the position location control means by conducting a plurality of operations of the GPS signal receiving means within one period of an output signal of the timing setting means and determining which operation is the most accurate. - View Dependent Claims (6, 7, 8, 9)
- time counting means for counting time and generating a reference clock signal;
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17. A GPS receiving apparatus comprising:
- GPS signal receiving means for receiving a GPS signal and being mountable on a user'"'"'s arm for monitoring the user'"'"'s position;
display means for displaying information based upon an output of the GPS signal receiving means;
arm swing detecting means for detecting periodic swinging motion of the user'"'"'s arm and outputting a corresponding periodic signal;
timing setting means for setting a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting means; and
position location control means for controlling operation timing of the GPS signal receiving means based on the output signal of the timing setting means so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion. - View Dependent Claims (18, 19, 20)
- GPS signal receiving means for receiving a GPS signal and being mountable on a user'"'"'s arm for monitoring the user'"'"'s position;
Specification