Electronic timepiece and satellite signal receiving method of electronic timepiece

A technology of electronic clocks and satellite signals, applied to radio-controlled timers, instruments, etc., can solve the problems of increased power consumption, increased memory circuit scale, and increased information volume, so as to improve the success rate of reception and reduce storage Information volume, size reduction effect

Inactive Publication Date: 2015-03-18
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, in the electronic timepiece of Patent Document 1, it is necessary to generate reception histories at each time (8-minute intervals), so the amount of stored information increases and the size of the memory circuit increases.
In addition, the reception process becomes complicated due to the selection of position information satellites from a huge reception history
[0006] Due to these factors, the power consumption may increase and the overall power consumption cannot be sufficiently reduced

Method used

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  • Electronic timepiece and satellite signal receiving method of electronic timepiece
  • Electronic timepiece and satellite signal receiving method of electronic timepiece
  • Electronic timepiece and satellite signal receiving method of electronic timepiece

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0086] [structure of the electronic clock]

[0087] Such as figure 1 As shown, the electronic timepiece 1 receives satellite signals from a plurality of GPS satellites 100 (positional information satellites according to the present invention) revolving above the earth in a predetermined orbit. At this time, the electronic timepiece 1 is configured to receive satellite signals from at least one GPS satellite 100 when acquiring time information, and to acquire positioning calculation information (ephemeris, orbit information, etc.) , receiving satellite signals from at least 3 (preferably 4) GPS satellites 100 . A plurality of GPS satellites 100 exist above the earth. Currently, about 30 GPS satellites 100 are rotating.

[0088] The electronic timepiece 1 is a wristwatch worn on a user's wrist, has a dial 11 and hands 12 , and measures and displays time.

[0089] Most of the dial 11 is made of a non-metallic material (for example, plastic or glass) through which light and mi...

no. 2 Embodiment approach

[0215] Next, a second embodiment of the present invention will be described with reference to the drawings.

[0216] The second embodiment differs from the first embodiment in that, in the receiving process, the storage of the satellite numbers in the storage control unit 44 targets the GPS satellites 100 captured within a certain period of time. Other structures are the same as those of the first embodiment.

[0217] Figure 7 , Figure 8 It is a flowchart showing reception processing in the second embodiment.

[0218] Such as Figure 7 , Figure 8 As shown, the control circuit 40 performs the processing of SB11 to SB30. Here, the processing of SB11 to SB29 is the same processing as SA11 to SA29 in the first embodiment, and thus description thereof will be omitted.

[0219] In the first embodiment, the storage control unit 44 stores the satellite number in the satellite number storage unit 51 immediately before the reception process ends (SA26).

[0220] On the other h...

no. 3 Embodiment approach

[0234] Next, a third embodiment of the present invention will be described with reference to the drawings.

[0235] The third embodiment differs from the electronic timepiece 1 of the first embodiment in that the number of GPS satellites 100 captured by the satellite capture control unit 421 is determined at predetermined time intervals in the reception process.

[0236] Figure 12 It is a block diagram showing the circuit configuration of the electronic timepiece of the third embodiment.

[0237] Such as Figure 12 As shown, the reception control unit 42C of the electronic timepiece 1C of the third embodiment includes a time-based reception state determination unit 424 in addition to the configuration of the reception control unit 42 of the electronic timepiece 1 of the first embodiment. In addition, other structures of the electronic timepiece 1C are the same as those of the electronic timepiece 1 .

[0238] The time-based reception state determination unit 424 determines...

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Abstract

The invention relates to an electronic timepiece and a satellite signal receiving method of the electronic timepiece. A receiving control portion of the electronic timepiece comprises a satellite capture control portion, a receiving state judging portion, a receiving stop control portion and a storage control portion. The satellite capture control portion is a control portion that controls a GPS receiving circuit during receiving treatment, sets a threshold value of a received signal level and searches and captures position information satellites. The satellite capture control portion sets the position information satellites with satellite numbers stored in a satellite number storage portion as priority search satellites and searches the satellites in priority to other position information satellites. The receiving state judging portion judges whether the number of the position information satellites captured by the satellite capture control portion exceeds a specified number when the search for the priority search satellites with the threshold value of the received signal level set as the specified value is over. The receiving stop control portion enables the GPS receiving circuit to stop receiving satellite signals when it is determined that the number of the position information satellites is less than the specified number. The storage control portion storages the satellite numbers of the position information satellites captured during receiving treatment in the satellite number storage portion.

Description

technical field [0001] The present invention relates to an electronic timepiece that receives satellite signals transmitted from position information satellites such as GPS satellites to obtain the current date and time, and a satellite signal receiving method for the electronic timepiece. Background technique [0002] An electronic timepiece that corrects the time by receiving satellite signals transmitted from position information satellites such as GPS (Global Positioning System: Global Positioning System) satellites has been proposed (for example, refer to Patent Document 1). [0003] In the electronic timepiece of Patent Document 1, focusing on the fact that the position information satellite is located at approximately the same position at the same time every day, the reception history of the position information satellite is stored together with the reception time, and when the time is corrected, the reception history is referred to, The position information satellite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R20/04
CPCG04R20/04
Inventor 秋山利一
Owner SEIKO EPSON CORP
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