JPH0943369A - Time data receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform correction according to a time cord without any error by comparing received day of week data with day of week data calculated from a year, a month, and a day cord and correcting the time and date data based on the month, the day, the hour, the minute code, only when the both coincide with each other. SOLUTION: A time and date counter circuit 6 counts a standard clock signal so as to obtain the time and date data. A receiving circuit 2 receives the standard radio wave containing the year, the month, the day, the day of week, the hour, and the minute code so as to obtain the day-of-week data from the received year, month, and day data and compares this day of week data with the received day of week data. When coincidence is detected by a comparison means, the time and date data of the circuit 6 is corrected based on the received month, day, hour, and minute data. This constitution can prevent the time from corrected based on the time cord containing errors caused by noise, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time data receiving apparatus for receiving a radio wave containing time information and measuring the time.

[0002]

2. Description of the Related Art In Germany, Japan, etc., a long wave standard radio wave including a time code is transmitted, and a radio timepiece that receives the standard radio wave and measures the time is considered.

For example, in Germany, 77.5 KHZ amplitude-modulated by a time code of format as shown in FIG.
Long wave standard radio wave is used. The 1-minute frame has a field for future expansion at the beginning,
Following that, antenna information R, summer time information Z1,
Z2, summer time notice A1, and leap second notice A2 are transmitted. In addition, the minute, hour, day, day of the week, month, and year data are transmitted.At the end of each of the minute, hour, and year data, minute parity, hour parity, and year parity are provided. Transmits an M code indicating that it is the 59th second.

The data transmitted as the time code has a low level for 0.2 seconds and a high level signal of "1" for the remaining 0.8 seconds, and a low level for 0.1 second and a high level signal of "0.9" for the remaining 0.9 seconds. Is represented. Further, a high level signal for 1 second represents the M code.

In a radio-controlled timepiece that receives such standard radio waves to measure the time, for example, the time code is repeated twice in order to prevent reception of erroneous data due to noise or the like contained in the time code. When the time difference between them is 1 minute, the time is adjusted.

[0006]

However, when the time is adjusted when the time difference between the continuously received time codes is 1 minute, the time, day, day, month,
Two consecutive timecodes have exactly the same noise on one of the year data, and two timecode days
Even when the day of the week, the month, and the year are erroneous data, the time difference between the two time codes is 1 minute, and it was erroneously determined that the correct time code was received.
There was a problem that the time was corrected due to an incorrect time code.

An object of the present invention is to prevent the time from being corrected by a time code containing an error.

[0008]

A time data receiving apparatus of the present invention includes time counting means for counting a reference clock signal to obtain time and date data, and year, month, day, day of the week, hour and minute codes. The standard radio wave is received and the receiving year, month, day, day of the week,
A receiving means for obtaining the hour and minute data, a day of the week calculating means for obtaining the day of the week data from the received year, month, day data, a comparing means for comparing the day of the week data obtained by the day of the week calculating means with the received day of the week data, When a match is detected by the comparison means, there is provided correction means for correcting the time and date data of the time counting means based on the received month, day, hour and minute data.

According to the present invention, only when the day of the week data obtained from the received year, month and day codes and the day of the week data obtained from the received day of the week code match, the received month, day, hour,
Since the time and date data are corrected based on the minute data, it is possible to prevent the time and date data from being corrected by the time code including an error due to noise or the like.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit block diagram of a radio-controlled timepiece according to an embodiment of the present invention.

The radio signal received by the antenna 1 is demodulated by the receiving circuit 2, and a time code (time code) consisting of year, month, day, day of the week, hour and minute codes is output to the control section 3. The clock signal of a predetermined frequency generated by the oscillation circuit 4 is frequency-divided by the frequency dividing circuit 5 and output to the time / date counting circuit 6. The time / date counting circuit 6 counts the frequency-divided signal, obtains current time data including time and date, and outputs the current time data to the control unit 3.

The control unit 3 corrects the current time data counted by the time / date counting circuit 6 based on the time code received by the receiving circuit 2 and sends the corrected current time data to the time / date counting circuit 6. Output and rewrite the current time data. Further, the control unit 3 executes a switch process for switching an operation mode or the like according to a switch input of the switch unit 7, a radio wave correction process for receiving a radio wave and correcting the current time data, and the like, and outputs the processing result to the RAM 8 And the current time is displayed on the display unit 9.

Although the switch section 7 is not shown,
It has a switch S1 for switching between the basic timepiece mode and the radio wave receiving mode, a switch S2 for switching between the basic timepiece mode and the time adjustment mode, and a switch S3 for selecting a correction digit in the time adjustment mode.

Next, the general operation of the radio-controlled timepiece having the above-mentioned configuration will be described with reference to the flow chart of FIG. First, it is determined whether or not there is a switch input (FIG. 2, a1). If any switch is operated,
The switch process of step a2 is executed. Step a1
If it is determined that there is no switch input (a1, NO) or after step a2, it is determined whether or not the switch S1 is turned on for performing radio wave correction (a3). If the determination in step a3 is YES and the radio wave reception mode is set, the current time is 2 am in the next step a4.
When it is time or 4:00, it is determined whether or not it is, and when the time is reached, the process proceeds to step a5 to perform radio wave correction processing.
The radio-controlled timepiece of the present embodiment automatically receives radio waves twice at 2:00 am and 4:00 am and corrects the time.

If the determination in step a3 is NO, or after step a5, the process proceeds to the display process in step a6 to display the current time or the corrected time on the display unit 9. Here, the contents of the above-described switch processing will be described with reference to the flowchart of FIG. The flag A is set to "0" in the basic clock mode and the radio wave reception mode,
In the time correction mode, "1" is set.

At step a11 in FIG. 3, the flag A is "0".
It is determined whether or not, that is, whether or not it is the basic clock mode (or the radio wave reception mode). If the flag A is "0", it is then determined whether or not the switch S1 is turned on (a12). If the switch S1 is turned on, the display of the display unit 9 is changed from the time display to the date display. , Or vice versa, the date display is changed to the time display (a13).

If it is determined in step a12 that the switch S1 is not operated (a12,
NO), and then it is determined whether or not the switch S2 is operated (a
14). If it is determined that the switch S2 is turned on, the flag A is set to "1" to switch to the time correction mode (a15), and the register B is set to "0" as an initial value.

If it is determined in step a14 that the switch S2 is not operated (a14,
No), it is determined whether or not the switch S1 is in the hold state, and if the switch S1 is in the hold state, the manual reception process of step a17 is executed.

In the determination in step a11, the flag A is A ≠
If it is determined to be 0, the process proceeds to step a18 and it is determined whether or not the flag A is "1", that is, whether or not it is the time adjustment mode. When the flag A = 1 and the operation mode is the time adjustment mode, the process proceeds to step a19 and it is determined whether or not the switch S2 is operated. If the switch S2 is operated,
The flag A is set to "0" to switch to the basic clock mode. That is, by operating the switch S2, the basic timepiece mode and the time adjustment mode can be switched alternately.

If the flag A is set to "0", then it is determined whether or not the time or date is corrected (a2).
1). When the date or time is corrected (a2
1, YES) It is determined whether or not the reception mark is lit, that is, whether or not the time is corrected by the time code (a22). If the reception mark is lit, the reception mark is turned on in the next step a23. Turn off the light.

That is, when the time code is received and the time is adjusted, the mode is switched to the time adjustment mode, and when the time is manually adjusted, the reception mark is turned off and the displayed time is displayed. It is made clear that is not the time corrected by the time code. As a result, the user can determine from the display whether the displayed time is the correct time corrected by the time code or another time.

If it is determined in step a19 that the switch S2 is not operated (a19, N
O), proceeding to step a24, it is determined whether or not the switch S3 is operated. When the switch S3 is operated (a24, YES), the value of the register B is set to "0"-
Change cyclically within the range of "6".

If it is determined in step a24 that the switch S3 has not been operated, it means that the switch S1 has been operated. In that case, the processing in steps a26 to a29 is performed according to the value of the register B. Run.

For example, when the switch S1 is turned on when the value of the register B is "0", the automatic reception is turned on or off in step a26. Also,
When the value of the register B is "1" and the switch S1 is turned on, the value of the second digit is increased by +30 seconds or -30 seconds. When the value of the register B is "2" and the switch S1 is turned on, the value of the hour digit is incremented by "1" in step a28. Further, when the value of the register B is "6" and the switch S1 is turned on, the step a
Update the date one day at 29.

That is, in the time correction mode, the switch S3 can be operated to select whether to turn on or off the automatic reception and to select the digit to be corrected. Then, by selecting one of the states with the switch S3 and further operating the switch S1, it is possible to set ON / OFF of the automatic reception or set a desired numerical value to the selected time correction digit.

Now, switching of display in each operation mode will be described with reference to FIG. In the basic timepiece mode (A = 0) shown in FIG. 7A, the switch S1 can be operated to switch between the date display state and the time display state.

When the switch S2 is operated in the basic timepiece mode, the mode is switched to the time adjustment mode (A = 1) shown in FIG. Immediately after switching to the time adjustment mode,
"0" is set in the register B as an initial value, and the automatic reception is turned on or off. In this state, by turning on the switch S1, it is possible to alternately switch the automatic reception ON state and the OFF state.

When the switch S3 is turned on while the automatic reception is on or off, "1" is set in the register B,
The second digit of the time display flashes and the second digit can be corrected. When the switch S3 is further turned on in this state, "2" is set in the register B, the numerical value of the hour digit of the time display blinks, and the hour digit can be corrected. In addition, switch S
When 3 is turned on, “3” is set in the register B, the numerical value of the minute digit blinks, and the minute digit can be corrected. When the switch S3 is turned on in this state, "4" is set in the register B, the numerical value of the year digit of the date blinks, and the year digit can be corrected. Further, when the switch S3 is turned on, "5" is set in the register B, the value of the month digit of the date blinks, and the month digit can be corrected. Next, when the switch S3 is turned on, "6" is set in the register B, the numerical value of the date digit of the date blinks, and the date digit can be corrected. When the switch S3 is turned on again in this state, "0" is set in the register B, and the first automatic reception ON / OFF setting state is set.

In the basic clock mode, the switch S
When 1 is put in the hold state, the mode switches to the radio wave reception mode shown in FIG. In this radio wave reception mode, if the time code can be received twice within 6 minutes, the time is corrected by the time code, and the reception mark indicating that the time is corrected by the time code is displayed on the display unit 9. 9
a is lit up and displayed. On the other hand, if the time code cannot be received even after 6 minutes have passed, an error is displayed for 2 seconds.

Next, the contents of the radio wave receiving process in step a5 of FIG. 2 will be described with reference to the flowchart of FIG.
In step a31 of FIG. 5, it is determined whether or not the M code indicating the 59th second of the time code has been received. When M code is received, minutes, hours,
Day, month and year data are obtained (a33). Furthermore, the day of the week is calculated from the received date data of the year, month, and day of the received time code (a33). It is determined whether or not the day of the week calculated from the year, month, and day data of the time code matches the day of the week of the received time code (a34).

At step a34, when the day of the week of the received time code and the day of the week calculated by the day, month, and year data of the time code match, the day, month, and year data are not affected by noise or the like. In this case, the number of times the time code is received is incremented by 1 (a35), and then it is determined whether the time code has been received twice (a36).

On the other hand, the day of the week of the received time code,
If the day of the week calculated from the day, month, and year data does not match, there is an error in part of the time code due to noise, etc., so the day of the week calculated from the year, month, and day codes and the received day of the week code were obtained. Since the day of the week does not match (a34, NO), the process proceeds to step a42, and it is determined whether 6 minutes have elapsed since the start of reception.

When the determination in step a36 is YES and the time code is received twice, it is determined whether the relationship between the two data is correct (a37). For example, when the time code is received twice consecutively, the time difference of the time data obtained from the received time code is 1 minute. Therefore, when the time difference of the time data is 1 minute (a37,
(YES), and it is further determined whether or not the second digit is 00 seconds (a38). If the second digit is determined to be 00 seconds in this determination, the current time data is corrected based on the received time code (a39). As a result, the date and time data are corrected by the received time code, and the reception mark 9a is displayed on the display unit 9 in a lighted state.

If the relationship between the time data obtained from the two time data received in step a37 is not correct, the process proceeds to step a41, where "0" is set in the register for storing the number of receptions, and then the process returns to step a31. .

In the above process, when the M code indicating that the second digit of the time data is 59 seconds is not received (a31, NO), the calculated day of the week does not match the received day of the week. (A34, NO) or when the time code was not received for the second time (a36,
No), the process proceeds to step a42, and it is determined whether 6 minutes have elapsed since the start of reception of the radio wave.

When 6 minutes have elapsed since the start of reception of the radio wave, it is judged whether or not the correction time at 4 o'clock has been reached (a43). If the current time is 4 o'clock, (A43,
(YES), it is determined whether or not the previous correction at 2 o'clock was normally performed (a44). If it is determined by this determination that the correction at 2 o'clock of the previous time is not normally performed (a44, N
O), the time is not corrected normally by the time code of 2:00 am and 4:00 am, and there is a possibility that an error has occurred. Therefore, in the next step a45, the reception mark 9a is turned off. .

At step a42, 6 after the start of reception.
If it is determined that the minutes have not elapsed (a42, N
O), the current time is displayed (a46). Next, the processing contents of the manual reception processing in step a17 of FIG. 3 will be described with reference to the flowchart of FIG.

When the mode is switched to the manual reception mode, the time display on the display unit 9 is turned off (a51). Then, in steps 52 to a63, the same processing as that in steps a31 to a42 of the radio wave correction processing described above is executed.

That is, if a time code that matches the day of the week calculated from the received year, month, day code and the day of the week obtained from the received day code is received twice, two time codes obtained from those time codes are received. It is determined whether the relationship of the reception time data is correct. Then, if the relationship between the two reception time data is correct, the current time data is corrected based on the time code. When the time adjustment is completed, the reception mark 9a is turned on.

On the other hand, when the M code is not detected in step a52, the days of the week do not match in step a55, or the time code cannot be received twice in step a57, the reception is started in step a63. It is determined whether or not 6 minutes have passed since the start. If the time code cannot be received twice even after 6 minutes have elapsed from the start of reception, an error display is given for 2 seconds (a6
4).

In the above-described embodiment, the correct time code can be received when the day of the week data matches and the time data obtained from the two time codes match, or when both have a predetermined time difference. Although it is determined that the correct time code is received when the day of the week data matches.

Further, the time data receiving apparatus of the present invention is
The device is not limited to the device dedicated to the timepiece such as the radio timepiece of the embodiment, and may be a device in which another device and the radio timepiece are combined.

[0043]

According to the present invention, the day of the week data obtained from the received day of the week code is compared with the day of the week data calculated from the year, month, and day codes, and only when both match.
Since the time and date data are corrected based on the received month, day, hour, and minute codes, it is possible to prevent the time from being corrected based on the time code including an error due to noise or the like.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing the same operation of the embodiment.

FIG. 3 is a flowchart of a switch process.

FIG. 4 is an explanatory diagram of operation modes.

FIG. 5 is a flowchart of a radio wave correction process.

FIG. 6 is a flowchart of a manual reception process.

FIG. 7 is an explanatory diagram of a time code.

[Explanation of symbols]

 2 Receiver circuit 3 Control unit 7 Switch unit 9 Display unit

Claims (3)

[Claims] 1. A time counting means for counting a reference clock signal to obtain time and date data, and a standard radio wave including a year, month, day, day of the week, hour and minute codes for receiving the year, month, day, Receiving means for obtaining day of the week, hour, minute data, day of the week calculating means for obtaining day of the week data from the received year, month, day data, comparison for comparing the day of the week data obtained by the day of the week calculating means with the received day of the week data Means, and when the comparison means detects a match, the reception month,
The time of the time counting means based on the day, hour, and minute data,
A time data receiving device comprising: a correction unit that corrects date data. 2. The comparing means further detects whether or not a plurality of received time data obtained from a plurality of received year, month, day, day of the week, hour and minute codes have a predetermined time difference, The correction means, when the comparison means detects the coincidence of the day of the week data and also detects that the plurality of reception time data have a predetermined time difference, the reception month, day,
2. The time data receiving device according to claim 1, wherein the time and date data of the timekeeping means is corrected based on the hour and minute data. 3. The time data is corrected normally when the comparison means detects the coincidence of the days of the week and the plurality of reception time data have a predetermined time difference. The time data receiving device according to claim 2, further comprising display means for displaying a mark.