Time information acquiring apparatus and radio-controlled timepiece
By adopting the storage and parallel measurement method of divided synchronization point detection data in radio-controlled timepieces, the problem of long time data generation and errors caused by incorrect detection of partial synchronization points is solved, and fast and accurate time data correction and generation are realized.
Active Publication Date: 2012-02-08
CASIO COMPUTER CO LTD
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[0004] However, in the conventional method of generating time data described above, when it is determined that the generated time data do not match, the process of detecting the minute synchronous point is restarted.
Therefore, the data of the time code signal received previously is useless, and it takes time until the correct time data is obtained.
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[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0027] figure 1 It is a block diagram which shows the whole structure of the radio-controlled timepiece 1 which is an embodiment of this invention.
[0028] The radio-controlled timepiece 1 of this embodiment is an electronic timepiece having a function of automatically adjusting the time by receiving standard radio waves including a time code, and as a time display unit, the hands (second hand 2, minute hand 3, and hour hand 4) and The time is displayed on the liquid crystal display 7 which is exposed on the dial and performs various displays.
[0029] like figure 1 As shown, the radio-controlled timepiece 1 further includes: an antenna 11 that receives standard radio waves; a radio-wave receiving circuit (radio-wave receiving unit) 12 that demodulates the standard radio waves to generate a time code signal; and a timer circuit that generates various tim...
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Disclosed are a time information acquiring apparatus and a radio-controlled timepiece. The time information acquiring apparatus comprises: a subsynchronous point detection data acquiring section acquiring subsynchronous point detection data for detecting a starting point of a frame; a subsynchronous point detection data storing section storing the subsynchronous point detection data; a subsynchronous point detecting section detecting the starting point of the frame of a timing code signal; a detection data acquiring section acquiring detection data used for identifying a pulse signal; a detection data storing section storing acquired detection data; a decoding section decoding a series of coding strings of the timing code signal for generating time data; a consistency determining section determining consistency of the time data acquired from decoding; and a controlling section enabling the subsynchronous point detecting section to detect the starting point of the frame again when the time data are determined to be inconsistent by the determining section and enabling the decoding section to generating time data again based on new detection result of the starting point of the frame and detection data stored in the detection data storing section.
Description
technical field [0001] The present invention relates to a time information acquisition device for acquiring time information by inputting a time code signal included in a standard radio wave, and a radio-controlled timepiece having the time information acquisition device. Background technique [0002] In a general radio-controlled timepiece, in order to generate time data by receiving standard radio waves, first, second synchronization points (0.00 seconds, 1.00 seconds, to 59.00 seconds) of the time code signal extracted from the standard radio waves are detected, and then minute synchronization points are detected. (X minutes and 00 seconds, X is an arbitrary minute value), and the time data is generated by code discrimination of the time code signal based on the second synchronization point and the minute synchronization point. [0003] In addition, as a prior art related to the present invention, Japanese Patent Laid-Open No. 2006-337048 discloses a configuration in whic...
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IPC IPC(8): G04G5/00G04G7/00G04G21/04G04R20/00G04R20/12
CPCG04R20/10
Owner CASIO COMPUTER CO LTD