Timekeeping device and satellite signal reception method for a timekeeping device
First Claim
1. A timekeeping device, comprising:
- a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite;
a time information generating unit that generates time information based on the satellite signal received by the reception unit;
a time display unit that displays time information; and
a reception control unit that controls the reception unit;
wherein the reception control unit includesa satellite capture control unit that controls the reception unit to run the positioning information satellite capture process,a signal condition detection unit that detects a signal condition of the captured positioning information satellite;
a decoding control unit that controls the reception unit to apply a decoding process to the satellite signal transmitted from the captured positioning information satellite, anda reception channel setting unit that sets the reception unit to a single satellite mode or a multi-channel mode based on the signal condition detected by the signal condition detection unit; and
wherein the reception unit sets the number of positioning information satellites that can be simultaneously captured and decoded to 1 when set to the single satellite mode, and sets the number of positioning information satellites that can be simultaneously captured and decoded to more than 1 when set to the multi-channel mode.
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Accused Products
Abstract
A timekeeping device has a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite, a time information generating unit that generates time information based on the satellite signal received by the reception unit, a time display unit that displays time information, and a reception control unit that controls the reception unit. The reception control unit includes a satellite capture control unit that controls the reception unit to run the positioning information satellite capture process, a signal condition detection unit that detects the signal condition of the captured positioning information satellite, a decoding control unit that controls the reception unit to apply a decoding process to the satellite signal transmitted from the captured positioning information satellite, and a reception channel setting unit that sets the reception unit to a single satellite mode or a multi-channel mode based on the signal condition detected by the signal condition detection unit, and the reception unit sets the number of positioning information satellites that can be simultaneously captured and decoded to 1 when set to the single satellite mode, and sets the number of positioning information satellites that can be simultaneously captured and decoded to more than 1 when set to the multi-channel mode.
24 Citations
20 Claims
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1. A timekeeping device, comprising:
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a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite; a time information generating unit that generates time information based on the satellite signal received by the reception unit; a time display unit that displays time information; and a reception control unit that controls the reception unit; wherein the reception control unit includes a satellite capture control unit that controls the reception unit to run the positioning information satellite capture process, a signal condition detection unit that detects a signal condition of the captured positioning information satellite; a decoding control unit that controls the reception unit to apply a decoding process to the satellite signal transmitted from the captured positioning information satellite, and a reception channel setting unit that sets the reception unit to a single satellite mode or a multi-channel mode based on the signal condition detected by the signal condition detection unit; and wherein the reception unit sets the number of positioning information satellites that can be simultaneously captured and decoded to 1 when set to the single satellite mode, and sets the number of positioning information satellites that can be simultaneously captured and decoded to more than 1 when set to the multi-channel mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A timekeeping device, comprising:
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a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite; a time information generating unit that generates time information based on the satellite signal received by the reception unit; a time display unit that displays time information; and a reception control unit that controls the reception unit; wherein the reception control unit includes an evaluation unit that evaluates a reception environment of the timekeeping device before the reception process executes; and a search mode selection unit that selects a single satellite search mode or a plural satellite search mode based on the result from the evaluation unit when the reception unit runs the reception process, the single satellite search mode being a mode for capturing one positioning information satellite and acquiring time information based on the satellite signal transmitted from the captured positioning information satellite, and the plural satellite search mode being a mode for capturing a plurality of positioning information satellites and acquiring time information based on the satellite signal transmitted from one of the plural captured positioning information satellites. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A satellite signal reception method for a timekeeping device having a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite,a time information generating unit that generates time information based on the satellite signal received by the reception unit, a time display unit that displays time information, and a reception control unit that controls the reception unit, the satellite signal reception method comprising:
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capturing the positioning information satellite; detecting the signal condition of the positioning information satellite captured in the satellite capture step; decoding the satellite signal transmitted from the positioning information satellite captured in the satellite capture step; and setting the reception unit based on the signal condition detected in the signal condition detection step to a single satellite mode in which the number of positioning information satellites that can be simultaneously captured and decoded is 1, or a multi-channel mode in which a plural number of positioning information satellites can be simultaneously captured and decoded.
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Specification