JP3551567B2 - Time data receiving device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a time data receiving device that receives a radio wave including time information and corrects time data.
[0002]
[Prior art]
In Germany, Japan, and the like, a long-wave standard radio wave including a time code is transmitted, and a radio-controlled timepiece that receives this standard radio wave and measures the time has been considered.
[0003]
For example, in Germany, a long-wave standard radio wave of 77.5 KHZ amplitude-modulated by a time code of a format as shown in FIG. 7 is used. In the one-minute frame, a field for future expansion is first secured, and subsequently, antenna information R, summer time information Z1, Z2, summer time notice A1, and leap second notice A2 are transmitted. Further, minute, hour, day, day of the week, month, and year data are transmitted. Furthermore, minute parity, hour parity, and year parity are transmitted at the end of each of the minute, hour, and year data, and the M code is transmitted at the 59th second following the year parity.
[0004]
Note that the minute, hour, day, etc. data transmitted as a time code is a low level signal for 0.2 seconds and a high level signal for the remaining 0.8 seconds is “1”, and a low level signal for 0.1 seconds is a low level signal. A high level signal represents "0" for 0.9 seconds. Also, the M code indicates that the high level signal for one second is the 59th second.
[0005]
In such a radio timepiece that receives a standard radio wave and measures the time, it is necessary to receive radio waves at predetermined time intervals and correct the time.However, in an environment where the radio clock cannot receive radio waves well, May cause an error.
[0006]
Therefore, every time the time of the time correction is reached, it is determined whether or not the radio wave is correctly received and accurate time data is obtained, and when the time is corrected, the display is turned on, and when the time cannot be corrected, It has been considered that turning off the display clearly indicates whether or not the time is correct.
[0007]
[Problems to be solved by the invention]
However, since the display is turned on or off depending on whether or not the time is corrected by the time code, for example, even if the time is manually adjusted after the time is corrected by radio waves and the time is shifted, the display is not performed. Your body will be lit. As a result, the user has a problem that the displayed time is erroneously recognized as the correct time corrected based on the time code received at the previous time correction.
[0008]
An object of the present invention is to enable a user to recognize whether or not a displayed time is an accurate time corrected by a standard time signal.
[0009]
[Means for Solving the Problems]
The time data receiving apparatus according to the present invention includes a time counting unit that counts a reference clock signal to obtain time data, and receives time data at predetermined intervals to determine whether or not the received time data is accurate. A first correction unit that corrects the time data of the time counting unit based on the reception time data when it is determined that the first time correction of the time data by the first correction unit is successful. A display means for changing to a display state and a second display state when a failure occurs, a switch for switching between a basic clock mode and a time correction mode, and an external switch for switching to the time correction mode with the switch. a second correction means for correcting the time data of the time counting means by the operation of the operation switch, when switched to the basic clock mode with the selector switch, the date or time Discriminating means for discriminating whether or not Tadashisa, when the time fixed by the discriminating means is determined to have been performed, when the display means is in the first display state, the said display means the Display control means for switching the display state to the second display state.
[0010]
According to the present invention, if the time data is manually corrected and the display means is in the first display state at that time, the display is switched to the second display state indicating that the reception time data is not accurate. Therefore, it is possible to prevent the user from erroneously recognizing the time manually corrected as the correct time corrected by the standard time signal.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described 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.
[0012]
The radio signal received by the antenna 1 is demodulated by the receiving circuit 2, and a time code (time code) including a year, month, day, day of the week, hour, and minute code is output to the control unit 3. The clock signal of a predetermined frequency generated by the oscillation circuit 4 is 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 it to the control unit 3.
[0013]
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 outputs the corrected current time data to the time / date counting circuit 6 Rewrite the current time data. The control unit 3 executes switch processing for switching operation modes and the like in accordance with switch input of the switch unit 7, radio wave correction processing for receiving radio waves and correcting current time data, and the like. And the current time is displayed on the display unit 9.
[0014]
Although not shown, the switch unit 7 includes a switch S1 for switching between a basic clock mode and a radio wave reception mode, a switch S2 for switching between a basic clock mode and a time correction mode, and a switch S3 for selecting a correction digit in the time correction mode. Have.
[0015]
Next, a schematic operation of the radio timepiece of the embodiment having the above-described configuration will be described with reference to a flowchart of FIG.
First, it is determined whether or not there is a switch input (FIG. 2, a1). When any switch is operated, the switch processing of step a2 is executed. When it is determined in step a1 that there is no switch input (a1, NO) or after step a2, it is determined whether or not the switch S1 has been turned on to perform radio wave correction (a3). If the determination in step a3 is YES and the radio wave reception mode has been set, it is determined in the next step a4 whether the current time has reached 2:00 or 4:00 am, and if the current time has come, Then, the process proceeds to step a5 to perform a radio wave correction process. In the radio timepiece of the present embodiment, radio waves are automatically received twice at 2:00 am and 4:00 am, and the time is adjusted.
[0016]
If the determination in step a3 is NO, or after step a5, the process proceeds to the display process in step a6, where the current time or the corrected time is displayed 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, and is set to “1” in the time adjustment mode.
[0017]
At step a11 in FIG. 3, it is determined whether or not the flag A is "0", that is, whether or not the mode is the basic clock mode (or the radio wave reception mode). If the flag A is "0", it is determined whether the switch S1 is turned on next (a12). If the switch S1 is turned on, the display on the display unit 9 is changed from time display to date display. Or, conversely, the display is changed from the date display to the time display (a13).
[0018]
If it is determined in step a12 that the switch S1 has not been operated (a12, NO), it is next determined whether or not the switch S2 has been operated (a14). If it is determined in this determination that the switch S2 has been turned on, "1" is set in the flag A, the mode is switched to the time correction mode (a15), and "0" is set in the register B as an initial value.
[0019]
If it is determined in the step a14 that the switch S2 is not operated (a14, NO), it is determined whether or not the switch S1 is in a hold state. If the switch S1 is in a hold state, it is determined. , Execute the manual reception process of step a17.
[0020]
If it is determined in step a11 that the flag A is equal to 0, the process proceeds to step a18 to determine whether or not the flag A is "1", that is, whether or not the time correction mode is set. If the flag A = 1 and the operation mode is the time adjustment mode, the process proceeds to step a19 to determine whether or not the switch S2 is operated. If the switch S2 is operated, the flag A is set to "0" and the mode is switched to the basic clock mode. That is, by operating the switch S2, the basic clock mode and the time adjustment mode can be alternately switched.
[0021]
When "0" is set to the flag A, it is determined whether or not the time or date has been corrected (a21). When the date or time is corrected (a21, 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), and the reception mark is lit. Then, the reception mark is turned off in the next step a23.
[0022]
That is, after the time code is received and the time is adjusted, the mode is switched to the time adjustment mode. When the time is manually adjusted, the reception mark is turned off and the displayed time is changed to the time code. Specifies that the time is not the modified time. This allows the user to determine from the display whether the displayed time is the correct time corrected by the time code or another time.
[0023]
If it is determined in step a19 that the switch S2 is not operated (a19, NO), the process proceeds to step a24 to determine whether or not the switch S3 is operated. If the switch S3 is operated (a24, YES), the value of the register B is cyclically changed in the range of "0" to "6".
[0024]
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 of steps a26 to a29 is executed according to the value of the register B.
[0025]
For example, when the switch S1 is turned on while the value of the register B is "0", the automatic reception is switched on or off in step a26. 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 switch S1 is turned on when the value of the register B is "2", 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 date is updated by one day in step a29.
[0026]
That is, in the time adjustment mode, the switch S3 can be operated to switch on / off automatic reception and to select a digit to be adjusted. 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 correction digit.
[0027]
Here, switching of display in each operation mode will be described with reference to FIG.
In the basic clock mode (A = 0) shown in FIG. 9A, the switch S1 can be operated to switch between the date display state and the time display state.
[0028]
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 and off. By turning on the switch S1 in this state, it is possible to alternately switch the automatic reception ON state and the OFF state.
[0029]
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 blinks, 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, and the hour digit of the time display blinks, so that the hour digit can be corrected. Further, when the switch S3 is turned on, "3" is set in the register B, the minute digit flashes, and the minute digit can be corrected. In this state, when the switch S3 is turned on, "4" is set in the register B, the numerical value of the year digit of the date flashes, and the year digit can be corrected. Further, when the switch S3 is turned on, "5" is set in the register B, the numerical value of the month digit of the date flashes, and the month digit can be corrected. Next, when the switch S3 is turned on, "6" is set in the register B, the date digit of the date flashes, 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 is turned on and off.
[0030]
When the switch S1 is set to the hold state in the basic timepiece mode, the mode is switched to the radio wave reception mode shown in FIG. In this radio wave reception mode, if the time code can be received twice before the lapse of six minutes, the time is corrected by the time code, and a display mark indicating that the time is corrected by the time code is displayed on the display unit 9. 9a is lit. On the other hand, if the time code cannot be received even after 6 minutes, an error is displayed for 2 seconds.
[0031]
Next, the contents of the radio wave reception processing in step a5 in FIG. 2 will be described with reference to the flowchart in FIG.
At step a31 in FIG. 5, it is determined whether or not an M code indicating that the time code is 59 seconds is received. When the M code is received, minute, hour, day, month and year data are obtained from the time code (a33). Further, 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).
[0032]
At step a34, when the day of the week of the received time code matches the day of the week calculated by the day, month, and year data of the time code, the day, month, and year data are accurately calculated without being affected by noise or the like. In this case, the number of times of reception of the time code is incremented by one (a35), and it is determined whether the time code has been received twice (a36).
[0033]
On the other hand, if the day of the week of the received time code does not match the day of the month calculated from the day, month, and year data, the time code is calculated from the year, month, and day code because part of the time code is incorrect due to noise or the like. Since the day of the week does not match the day of the week obtained from the received day code (a34, NO), the process proceeds to step a42 to determine whether six minutes have elapsed since the start of reception.
[0034]
If the determination in step a36 is YES and the time code has been received twice, then it is determined whether or not the relationship between the two data is correct (a37). For example, when the time code is received twice consecutively, the time difference between the time data obtained from the received time code is 1 minute. Therefore, when the time difference between the time data is 1 minute (a37, YES). Then, it is determined whether or not the second digit has become 00 seconds (a38). If it is determined that the second digit is 00 seconds, 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, so that the reception mark 9a is lit on the display unit 9.
[0035]
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 a register for storing the number of receptions, and then the process returns to step a31.
[0036]
In the above-described processing, when the M code indicating that the second digit of the time data is 59 seconds is not received (a31, NO), when the calculated day does not match the received day ( a34, NO), or when the time code has not been received for the second time (a36, NO), the process proceeds to step a42, and it is determined whether or not six minutes have elapsed since the start of radio wave reception.
[0037]
If six minutes have elapsed since the start of the reception of the radio wave, it is determined whether or not the correction time of 4:00 has been reached (a43), and if the current time is 4:00 (a43, YES), it is determined whether or not the previous two o'clock correction was normally performed (a44). If it is determined in this determination that the correction of the previous two o'clock was not performed normally (a44, NO), the correction of the time by the time code of 2:00 and 4:00 am was not performed normally. Since there is a possibility that an error has occurred, the reception mark 9a is turned off in the next step a45.
[0038]
If it is determined in step a42 that six minutes have not elapsed since the start of reception (a42, NO), the current time is displayed (a46).
Next, the content of the manual reception process in step a17 in FIG. 3 will be described with reference to the flowchart in FIG.
[0039]
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 steps a31 to a42 of the above-described radio wave correction processing is executed.
[0040]
That is, if a time code that matches the day calculated from the received year, month, and day codes and the day obtained from the received day code are received twice, two reception time data obtained from those time codes are received. It is determined whether or not the relationship is correct. 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 correction is completed, the reception mark 9a is turned on.
[0041]
On the other hand, if no M code is detected in step a52, if the day of the week does not match in step a55, or if the time code cannot be received twice in step a57, the reception is started in step a63. It is determined whether six minutes have elapsed. If the time code cannot be received twice even after 6 minutes from the start of reception, an error display is performed for 2 seconds (a64).
[0042]
In the above-described embodiment, when the day of the week data matches and the time data obtained from the two time codes match, or when there is a predetermined time difference, the correct time code can be received. Although it is determined, the reception time data is not compared, and it may be determined that the correct time code has been received when the day of the week data matches.
[0043]
Further, the time data receiving device of the present invention is not limited to a device dedicated to a timepiece, such as the radio timepiece of the embodiment, but may be a device combining other devices with a radio timepiece.
[0044]
【The invention's effect】
According to the present invention, when the time is manually corrected, the first display state indicating that the reception time data is accurate is switched to the second display state indicating that the reception time data is not accurate. In addition, it is possible to prevent the time manually corrected from being erroneously recognized as the accurate time corrected based on the standard radio wave.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram of an embodiment of the present invention.
FIG. 2 is a flowchart schematically showing the same operation of the embodiment.
FIG. 3 is a flowchart of a switch process.
FIG. 4 is an explanatory diagram of an operation mode.
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 receiving circuit 3 control unit 7 switch unit 9 display unit

Claims (3)

Time counting means for counting reference clock signals to obtain time data;
Receiving time data at predetermined intervals, determining whether or not the received time data is accurate, and correcting the time data of the time counting means based on the received time data when it is determined that the received time data is accurate; Means of correcting
A display unit that is in a first display state when the time data is successfully corrected by the first correction unit, and is in a second display state when the time data is unsuccessful;
A changeover switch for switching between a basic clock mode and a time adjustment mode,
A second correction unit that corrects the time data of the time counting unit by operating an external operation switch when the mode is switched to the time correction mode with the changeover switch;
Determining means for determining whether the date or time has been corrected when the basic switch mode is switched by the changeover switch;
A display control means for switching the display means to the second display state when the display means is in the first display state when the determination means determines that the time has been corrected ;
A time data receiving device comprising: The display means displays a predetermined mark as a first display state when the correction of the time data by the first correction means succeeds , and erases the mark as a second display state when the correction fails ,
2. The display control unit according to claim 1, wherein, when the determination unit determines that the time has been corrected, if the mark is displayed on the display unit, the display control unit deletes the mark. Time data receiving device. The first correction means, when a plurality of reception time data received by said receiving means having a predetermined time difference, according to claim 1, characterized in that it is determined that the reception time data has been received correctly Time data receiving device.

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