JP2008082908A - Time information receiving device, time information receiving control program, and time information receiving control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct time while suppressing power consumption by efficiently receiving time data consisting of a plurality of digits. <P>SOLUTION: A receiving circuit is turned on (step S1), a time code is received, each data of minute, hour, total days, year, day of the week included in the time code is acquired (steps S5-S9), and the receiving circuit is turned off (step S10). When there is a digit where even one correct data has been acquired in steps S5-S9, only time corresponding to the digit where correct data has been acquired is corrected first (step S12). When determination in step S13 is NO and there is a digit where the reception is turned out a failure, the receiving circuit is turned on two seconds before the digit where the reception is turned out a failure, is transmitted by the later processing, and only the digit where the reception is turned out a failure, is received. Time is corrected with data of any remaining one of the obtained minute, hour, total days, year, and day of the week. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reception time information receiving apparatus, a time information reception control program, and a time information reception control method for receiving a standard radio wave including a transmitted time code consisting of a plurality of digits.

  Today, in each country (for example, Germany, UK, Switzerland, Japan, etc.), a standard radio wave including a time code is transmitted, and a standard radio wave including such a time code is received, whereby the current time is received. A so-called radio clock that corrects data has been put into practical use. The radio timepiece receives a standard radio wave via a built-in antenna every predetermined time, corrects the current time by amplifying and modulating the time code. The time code is transmitted as 1 frame at 1 bit / second, and is composed of time data composed of digits of minute, hour, total date, year, and day of the week.

When correcting the time, it is checked whether there is an error due to disturbance etc. in the time data of the minute, hour, day of the year, year, day of the week that constitutes the received time code, and there is no error in all the time data Only correct the time. If there is an error in any one of the time data, the received time code is discarded and the standard radio wave including the time code for one frame is received again. When a time code having no error in all time data is received, the time is corrected (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2002-14184

  However, when time correction is performed on the condition that all time data having received an error-free time code is received in this manner, if any one of the time data has an error, all the time data are included. It is necessary to receive the time code for one frame again. Therefore, depending on the reception environment, it is forced to receive a standard radio wave including a time code for one frame multiple times, and a large amount of power is consumed by receiving the standard radio wave including a time code for one frame multiple times. Will be a cause of reducing the battery life.

  The present invention has been made in view of such a conventional problem, and is capable of performing time correction while suppressing power consumption by efficiently receiving time data consisting of a plurality of digits. An object of the present invention is to provide a time information reception control program and a time information reception control method.

  In order to solve the above-mentioned problem, the time information receiving apparatus according to the first aspect of the present invention includes a time measuring unit for counting the reference clock signal to obtain time data and time data composed of a plurality of digits to be transmitted. The receiving means for receiving the standard radio wave, the first obtaining means for continuously operating the receiving means to obtain the time data included in the standard radio wave, and the first obtaining means cannot be obtained. The determination means for determining the digit of the time data, and the reception means is operated only at the timing at which the digit of the time data that could not be acquired determined by the determination means was transmitted, and the acquisition was impossible A second acquisition unit that acquires digit time data; and a correction unit that corrects the time data of the time measuring unit based on the time data acquired by the first and second acquisition units.

  The time information receiving apparatus according to the second aspect of the present invention further includes display means for displaying time data obtained by the time measuring means.

  In the time information receiving apparatus according to claim 3, the standard radio wave includes a marker indicating a reference timing when transmitting the time data, and the marker is received by the receiving means. A counting circuit that performs a counting operation in synchronization with the timing is provided, and the second acquisition unit includes a control unit that controls the start and stop of the operation of the receiving circuit based on the count value of the counting circuit.

  The time information reception control program according to the invention of claim 4 counts the reference clock signal and obtains time data, and a standard radio wave including time data consisting of a plurality of digits to be transmitted. A first acquisition means for acquiring time data included in the standard radio wave by continuously operating a computer included in a time information reception apparatus including a reception means for receiving; A determining means for determining the digit of time data that could not be acquired by the acquiring means, and the receiving means is operated only at the timing at which the digit of time data that could not be acquired determined by the determining means is transmitted. The time of the time measuring means is obtained by the second acquisition means for acquiring the time data of the digits that could not be acquired, and the time data acquired by the first and second acquisition means. To function as a correction means for correcting the data.

  In the time information reception control program according to the invention described in claim 5, the time measuring means for obtaining the time data by counting the reference clock signal, and the standard radio wave including the time data consisting of a plurality of digits to be transmitted. A method of controlling a time information receiving device comprising a receiving means for receiving,

  A first acquisition step of continuously operating the receiving means to acquire time data included in the standard radio wave, and a determination of determining the digit of the time data that could not be acquired by the first acquisition step And a second step of operating the receiving means only at a timing at which the digit of the time data that could not be acquired determined in this determination step is transmitted, and acquiring time data of the digit that could not be acquired And a correction step of correcting the time data of the time measuring means based on the time data acquired in the first and second acquisition steps.

  According to the present invention, the receiving means is operated only at the timing when the digit of the time data that could not be acquired by the first acquiring means is transmitted, and the time data of the digit that could not be acquired is acquired. Therefore, it is possible to efficiently receive time data composed of a plurality of digits while limiting the operation of the receiving means as much as possible. Therefore, it is possible to correct the time appropriately while suppressing the power consumption required for the operation of the receiving means.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration of a time information receiving apparatus according to an embodiment of the present invention. As shown in the figure, this circuit is configured with the CPU 1 as the center, and the CPU 1 controls each unit by operating based on a program stored in the ROM 2. The RAM 3 is used as a work area that is necessary when the CPU 1 operates.

  The antenna 4 is a circuit unit that receives 40 kHz and 60 kHz long wave standard time radio waves obtained by amplitude-modulating a time code of a predetermined format sent from a transmitting station, and sends it to the receiving circuit 5 as an electric signal corresponding thereto. . The receiving circuit 5 selects a specific frequency signal from the electric signal from the antenna 4, obtains a time code TC from the signal, and sends it to the CPU 1. The reception power supply circuit 10 is a circuit that obtains a reception circuit ON / OFF signal output from the CPU 1 and turns on / off the power supply of the reception circuit 5 in response thereto.

  The oscillation circuit 6 is a circuit that constantly sends a clock signal having a constant frequency. The frequency dividing circuit 7 counts the clock signal from the oscillation circuit 6 and sends a 1 second signal to the time counting circuit 8 every time the counted value becomes a value corresponding to 1 second, and receives a reset signal from the CPU 1. This is a circuit unit that increases the coefficient value by one second. The time counting circuit 8 counts the 1 second signal from the frequency dividing circuit 7 to generate current hour data, current minute data, and current second data, and supplies the generated time data to the CPU 1. This is a circuit for correcting the current time data that is being counted with data. The date counting circuit 9 counts the one-day signal output from the time counting circuit 8 to generate current date data and current day-of-week data, and supplies them to the CPU 1, and counts with the time data from the CPU 1. This circuit corrects the current date data. The switch unit 11 includes various switches provided in a general radio timepiece, and sends an operation signal of each switch to the CPU 1. The display unit 12 displays data from the CPU 1, that is, current date / time data by the time counting circuit 8 and the date counting circuit 9.

  FIG. 2 is a diagram showing a format of a time code TC transmitted by being superimposed on the long wave standard time radio wave. This time code TC is 1 bit / second and 1 frame is one frame, and a reference marker M indicating the head of the code appears in the minute (0 second), and a position marker P1 indicating a break every 10 seconds, P2, P3, P4, P5, and P0 appear at 9 seconds, 19 seconds, 29 seconds, 39 seconds, 49 seconds, and 59 seconds. Between the reference marker M and the position marker P, data of minute, hour, total date from January 1, year, day of the week is allocated, and a fixed bit “0” is used as a delimiter in each data. Is set to appear at a specific number of seconds.

  In the present embodiment having the above-described configuration, the CPU 1 executes processing shown in a series of flowcharts shown in FIGS. 3 and 4 every time a predetermined time comes, based on a program stored in the ROM 2. That is, the receiving circuit 5 is turned on by outputting the receiving circuit ON signal to the receiving power supply circuit 10 (step S1). And it waits until the reference marker M of the time code TC is received by the receiving circuit 5 which is turned on (step S2). If the reference marker M is received (step S2; YES), it is determined whether or not the first rising edge of the time code TC has been received (step S3), and the frequency dividing circuit 7 is reset at the time of reception. Thus, 01 second is set in the counter (step S4).

  Further, the minute data is obtained from the minute digits of the received time code TC (step S5), the hour data is obtained from the hour digit (step S6), and the day data is obtained from the day digit (step S7). ), Year data is obtained from the year digit (step S8), and day data is obtained from the day digit (step S9). Thereafter, the receiving circuit 5 is output to the receiving power supply circuit 10 to turn off the receiving circuit 5 (step S10). Next, for example, whether the minute digit is any value from 0 to 59, or whether the minute value and error counted by the time counting circuit 8 are within 10 minutes, or the hour value is 0 Check whether the correct data has been received for each minute, hour, day of the month, year, day of the week, etc. It is determined whether or not there is a completed digit (step S11). If there is at least one digit for which correct data has been acquired, the time counting circuit 8 or the date counting circuit 9 corrects only the time corresponding to the digit for which correct data has been acquired (step S12).

  Subsequently, it is determined whether or not there is a digit for which reception has failed, that is, there is no digit for which correct data could not be acquired (step S13). If the determination in step S13 is YES and there is no digit for which correct data has not been acquired and all digits have been received normally, the time correction is performed for all digits by the processing in step S12 described above. Has been done. Accordingly, in this case, the subsequent processing is unnecessary, and the process proceeds to the end.

  However, if the determination in step S11 is NO and reception of correct data has failed for all digits, and if the determination in step S13 is NO and reception has failed, there is reception of the minute. It is determined whether or not it is a failure (step S14). If it is not the reception failure of the minute but the reception failure of other digits, the process proceeds to step S18 without performing the processing of steps S15 to S17. If it is determined that 58 seconds have elapsed based on the 1-second signal output from the frequency divider circuit 7 (step S15), the time when 58 seconds have elapsed, that is, 1 minute is set to 1 The receiving circuit 5 is turned on 2 seconds before the transmission of a new time code TC to be used as a frame (the next time code TC that is one after the time code TC received by the receiving circuit ON in step S1) (step S16). ). As a result, the receiving circuit 5 is turned on, and data corresponding to 8-bit data is acquired from the reference marker M in the time code TC received two seconds after the ON state is reached (step S17). .

  Further, it is determined whether or not the digit for which reception has failed is time data (step S18). If the reception of the hour data is unsuccessful, it is determined whether or not the receiving circuit is OFF (step S19). If the receiving circuit is ON rather than OFF, the processes of steps S20 and S21 are performed. Instead, the process proceeds to step S22. If it is OFF, it is determined whether or not 08 seconds have elapsed based on the 1-second signal output from the frequency divider circuit 7 (step S20). When 08 seconds have elapsed, that is, when 08 seconds have elapsed, which is 2 seconds before 10 seconds, which is the reception time of the digit at the next time code TC in which 1 minute is one frame, the receiving circuit 5 Is turned on (step S20). As a result, the receiving circuit 5 is turned on, and is the 7-bit data after the position marker P1 of the time code TC and the fixed bit “00” received after 2 seconds from the turning on (see FIG. 2). The hour digit is received to obtain hour data (step S22). On the other hand, if the determination in step S18 is NO and the digit that failed to be received is not hour data, it is determined whether or not the receiving circuit 5 is ON (step S23). In step S24, the receiving circuit 5 is turned off.

  Further, in step S25 of FIG. 4 following any of step S22, step S23, and step S24, it is determined whether or not the digit for which reception has failed is total date data. If the total date data reception has failed, it is determined whether or not the receiving circuit is OFF (step S26). If the receiving circuit is ON but not OFF, the processing of steps S27 and S28 is performed. It progresses to step S29, without. If it is OFF, it is determined whether or not 18 seconds have elapsed based on the 1-second signal output from the frequency divider circuit 7 (step S27). Then, when 18 seconds have elapsed, that is, when 18 seconds have elapsed, which is 2 seconds before 20 seconds which is the reception start time of the day of the day of the next time code TC with 1 minute as one frame, The circuit 5 is turned on (step S28). As a result, the receiving circuit 5 is turned on, and the position marker P2 of the time code TC and the 7-bit data after the fixed bit “00” and received after the position marker P3 are received 2 seconds after the ON state. Receiving the date of the total date composed of 4-bit data, the total date data is acquired (step S29). On the other hand, if the determination in step S25 is NO and the digit for which reception has failed is not the total date data, it is determined whether or not the receiving circuit 5 is ON (step S30) and is ON. In this case, the receiving circuit 5 is turned off (step S31).

  Further, in step S32 following any of step S29, step S30, and step S31, it is determined whether or not the digit for which reception failed is year data. If the reception of year data is unsuccessful, it is determined whether or not the receiving circuit is OFF (step S33). If it is ON instead of OFF, the processing of steps S34 and S35 is performed. Instead, the process proceeds to step S36. If it is OFF, it is determined whether or not 38 seconds have elapsed based on the 1-second signal output from the frequency dividing circuit 7 (step S34). When 38 seconds have elapsed, that is, when 38 seconds have elapsed, which is 2 seconds before 40 seconds, which is the reception start point of the year digit of the next time code TC in which 1 minute is one frame, the receiving circuit 5 is turned on (step S35). As a result, the receiving circuit 5 is turned on, and the position marker P4 of the time code TC and the 8-bit data after the spare bit SU2 received after 2 seconds from the ON state are received. The year data is acquired (step S36). On the other hand, if the determination in step S32 is NO and the digit that failed to be received is not year data, it is determined whether or not the receiving circuit 5 is ON (step S37). In step S38, the receiving circuit 5 is turned off.

  In step S39 following any of step S36, step S37, and step S38, it is determined whether or not the digit for which reception failed is day-of-week data. If reception of day-of-week data is unsuccessful, it is determined whether or not the receiving circuit is OFF (step S40). If it is ON instead of OFF, the processing of steps S41 and S42 is performed. Instead, the process proceeds to step S43. If it is OFF, it is determined whether or not 48 seconds have passed based on the 1-second signal output from the frequency divider circuit 7 (step S41). When 48 seconds have passed, that is, when 48 seconds have passed, which is 2 seconds before 50 seconds which is the reception start time of the day of the week of the next time code TC in which 1 minute is one frame, the receiving circuit 5 is turned on (step S42). As a result, the receiving circuit 5 is turned on, and the day of the week digit, which is 3-bit data following the position marker P5 of the time code TC received 2 seconds after the ON state is received, is received. Obtain (step S43). Thereafter, the receiving circuit 5 is turned off (step S44). On the other hand, if the determination in step S39 is NO and the digit that failed to be received is not day-of-week data, it is determined whether or not the receiving circuit 5 is ON (step S45). In step S44, the receiving circuit 5 is turned off.

  In step S45 following step S44 or step S45, at least one digit of the minute, hour, day of the year, year, and day of the week acquired in at least one step of steps S17, S22, S29, S36, and S46 described above. Using the data, only the corresponding digit of the coefficient value corresponding to the time counting circuit 8 or the date counting circuit 9 is corrected (step S46). As a result, all the digits including the remaining digits that have not been corrected in step S12 described above are time-corrected based on the time code TC.

It is a block circuit diagram showing an embodiment of the present invention. It is a figure which shows the format of a time code. It is a flowchart which shows the process sequence of this Embodiment. It is a flowchart following FIG.

Explanation of symbols

1 CPU
2 ROM
3 RAM
4 Antenna 5 Receiving Circuit 6 Oscillating Circuit 7 Dividing Circuit 8 Time Counting Circuit 9 Date Counting Circuit 10 Reception Power Supply Circuit 11 Switch Unit 12 Display Unit M Reference Marker TC Time Code

Claims (5)

Time counting means for obtaining time data by counting the reference clock signal;
Receiving means for receiving a standard radio wave including time data consisting of a plurality of digits to be transmitted;
A first acquisition unit that operates the reception unit continuously to acquire time data included in the standard radio wave;
Discriminating means for discriminating the digit of the time data that could not be obtained by the first obtaining means;
Second acquisition means for operating the reception means only at the timing at which the digit of the time data that could not be acquired determined by the determination means is transmitted, and acquiring time data of the digits that could not be acquired When,
A time information receiving apparatus comprising: correction means for correcting the time data of the time measuring means based on the time data acquired by the first and second acquisition means.   2. The time information receiving apparatus according to claim 1, further comprising display means for displaying time data obtained by the time measuring means. The standard radio wave includes a marker indicating a reference timing when transmitting the time data,
A counting circuit that performs a counting operation in synchronization with the timing at which the marker is received by the receiving means;
3. The time information receiving apparatus according to claim 1, wherein the second acquisition unit includes a control unit configured to control operation start and operation stop of the reception circuit based on a count value of the counting circuit. A computer having a time information receiving device comprising a time measuring means for counting a reference clock signal to obtain time data and a receiving means for receiving a standard radio wave including time data consisting of a plurality of digits to be transmitted;
First acquisition means for continuously operating the reception means to acquire time data included in the standard radio wave;
Discriminating means for discriminating the digit of the time data that could not be obtained by the first obtaining means;
Second acquisition means for operating the reception means only at the timing at which the digit of the time data that could not be acquired determined by the determination means is transmitted, and acquiring time data of the digits that could not be acquired When,
A time information reception control program that causes the time data acquired by the first and second acquisition means to function as correction means for correcting the time data of the time measuring means. A method for controlling a time information receiving device comprising a time measuring means for counting a reference clock signal to obtain time data and a receiving means for receiving a standard radio wave including time data consisting of a plurality of digits to be transmitted,
A first acquisition step of continuously operating the receiving means to acquire time data included in the standard radio wave;
A discriminating step for discriminating a digit of time data that could not be obtained by the first obtaining step;
The second acquisition step of operating the receiving means only at the timing when the digit of the time data that could not be acquired determined in this determination step is transmitted, and acquiring the time data of the digit that could not be acquired. When,
A time information reception control method comprising: a correction step of correcting the time data of the time measuring means based on the time data acquired by the first and second acquisition steps.

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