JP2004077333A - Radio corrected watch and hand operation method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio corrected watch and a hand operation method therefor, which are hardly influenced by a noise due to the hand operation. <P>SOLUTION: In the hand operation method for the radio corrected watch which includes, for obtaining information required for correcting the time, a receive part for receiving a standard time radio wave containing, in a cycle of one minute, a zero second position marker, information on minutes, information on hours, and other information represented by pulses having a period of one second and a drive part for driving a hand for displaying the time, the drive part drives the hand with a period having an interval of several seconds other than the divisors of 60, from the time when the receive part begins to receive the radio wave until the zero second position marker is detected. After the receive part receives the zero second position marker, until the receive part obtains the information required for correcting the time, the drive part drives the hand during a limited period of time within the cycle of one minute of the standard time radio wave when the other information not required for correcting the time is included. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a radio-controlled timepiece which is less susceptible to noise due to hand movement and is suitable for miniaturization, and a method of moving the hand.
[0002]
[Prior art]
Currently, in Japan, the Communications Research Laboratory of the Ministry of Internal Affairs and Communications transmits and operates a longwave standard time radio wave (JJY) containing time information using two transmission frequencies of 40 kHz (Fukushima station) and 60 kHz (Fukuoka station). ing. The signal of the time information included in the long-wave standard time radio wave includes minute information, hour information, total date information from January 1, parity information, last two digits of the Christian era, day of the week information, with one minute as one cycle. A binary code including information such as leap second information is transmitted serially using a rectangular pulse having a one-second cycle.
[0003]
FIG. 3 shows a time code format of time information superimposed on the standard time radio wave (JJY). The time information is a one-minute cycle, represented by a rectangular pulse having a one-second cycle, and represented by a binary code. The falling edge (or the rising edge when the polarity of the rectangular pulse is reversed) of each rectangular pulse having a one second period is synchronized with the start of each second. “0” or “1” of the 1-bit information constituting the binary code is represented by a rectangular pulse width (duration) of 800 ms or 500 ms. The marker P information is represented using a rectangular pulse having the same one-second cycle and a pulse width of 200 ms.
[0004]
At the beginning and end of the one minute cycle, there are marker signals M and P0 each having a width of 200 ms. Therefore, the second marker signal M of the two consecutive marker signals P0 and M is the zero-second position marker, and its falling edge indicates the beginning of every minute. Then, a binary code represented by a rectangular pulse between the zero-second position marker M and the next marker signal P1 represents a minute information code, and a rectangular pulse between P1 and the next marker signal P2 represents a time. The rectangular pulse between P2 and the next two marker signals P3 and P4 represents the code of the total date information and parity information from January 1, and represents the code of the information, and from P4 to the next marker signal P5. The rectangular pulse in between represents the last two digits of the Christian code, and the rectangular pulse from P5 to the last marker signal P0 represents the day of the week and leap second code.
[0005]
If one of these longwave standard time radio waves is received and detected to obtain time information, the exact time can be known. Therefore, the longwave standard time radio wave including time information is periodically received to correct the time. A radio-controlled timepiece with a device to manufacture is manufactured. The radio-controlled timepiece periodically receives a long-wave standard time radio wave including time information, acquires time information, and uses it for time correction.
[0006]
However, a radio-controlled timepiece of the type in which the time is displayed in an analog manner by a hand has a movement mechanism for moving the hands, and the movement mechanism has a step motor for driving the movement of the hands one step per second. Since the stepping motor is driven at one-second intervals, it generates noise at one-second intervals, and interferes with the above-described rectangular pulses at one-second intervals when receiving a long-wave standard time radio wave including the above-mentioned time information. . As a result, it may be difficult to obtain the time information by receiving the long-wave standard time radio wave, and correct time information may not be obtained.
[0007]
For this reason, conventionally, the antenna that receives the long-wave standard time radio wave and the movement mechanism including the step motor are placed away from each other, or noise is reduced by adding a part having a shielding effect, or the standard radio wave is reduced. It has been proposed that the stepping motor of the movement mechanism be completely stopped to stop the movement of the hands while receiving and acquiring the time information.
[0008]
Further, in the conventional example disclosed in Japanese Patent Application Laid-Open No. 2002-40170, the output timing of driving the second hand is set to a one-second cycle shifted by a fixed time of less than one second with respect to the second signal from the long-wave standard time radio wave. Thus, the drive of the step motor is prevented from overlapping the second signal from the long-wave standard time radio wave.
[0009]
[Problems to be solved by the invention]
However, the above-described prior art has the following problems. The method of keeping the antenna and the movement mechanism away from each other causes a problem when downsizing the radio-controlled timepiece. The method of adding a shield component requires a new component, and causes a problem when the radio-controlled timepiece is downsized. In the method of completely stopping the step motor when receiving the long-wave standard time radio wave and acquiring the time information, since the hand movement stops, the user may mistakenly think that the battery of the radio-controlled timepiece has run out or has failed.
[0010]
In the method disclosed in Japanese Patent Application Laid-Open No. 2002-40170, in which the drive timing of the second hand is shifted by a fixed time of less than 1 second so as not to overlap with the second signal from the standard radio wave, noise is generated from the stepping motor every 1 second. I do. For this reason, there is a possibility that noise may still interfere with a plurality of second signals having different pulse widths (800 ms, 500 ms, and 200 ms) of the standard radio wave, and a correct time code may not be detected and decoded from a rectangular pulse detected and detected. is there.
[0011]
Therefore, the present invention solves the above-mentioned problems of the prior art, and can be reduced in size, without increasing the number of parts, and without completely stopping the hand movement. It is an object of the present invention to provide a hand driving method and a radio-controlled timepiece that minimizes interference of the hand.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in order to obtain information necessary for time correction, time information including a zero-second position marker represented by a pulse of a one-second cycle is obtained. A method for moving a hand of a radio-controlled timepiece, comprising: a receiving unit for receiving a standard time radio wave included in a one-minute cycle; and a driving unit for driving a hand for displaying a time, wherein the receiving unit transmits the radio wave. From the start of reception to the detection of the zero-second position marker, the driving unit drives the hands of the hands at intervals of a number of seconds greater than 1 and other than a divisor of 60. Provide a method.
[0013]
According to the present invention described in claim 2, in order to acquire information necessary for time correction, information necessary for time correction including a zero-second position marker and other information different from the information required for time correction are stored in one. A hand-moving method for a radio-controlled timepiece, comprising: a receiving unit that receives a standard time radio wave included in a minute cycle; and a driving unit that drives a hand that displays a time, wherein the receiving unit includes the zero-second position. After detecting the marker, until the receiving unit obtains the information necessary for time correction, the driving unit moves the hands of the hands in the one minute cycle of the standard time radio wave. A hand driving method is provided which is driven only during a time period including information.
[0014]
According to the present invention described in claim 3, in order to acquire information necessary for time correction, information necessary for time correction including a zero-second position marker, which is represented by a pulse with a one-second cycle, and the time correction are performed. A hand operation method for a radio-controlled timepiece, comprising: a receiving unit for receiving a standard time radio wave including other information different from necessary information in a one-minute cycle; and a driving unit for driving a hand for displaying a time. From the start of reception of the radio wave by the receiving unit to the detection of the zero-second position marker, the driving unit sets the hand movement of the hand to a number of seconds greater than 1 and a number other than a divisor of 60. Driving at a period of the interval, after the receiving unit detects the zero second position marker, until the receiving unit acquires the information necessary for time correction, the driving unit controls the movement of the hands, 1 minute cycle of standard time radio wave To provide a hand movement method for driving only in a time zone that includes the other information that does not require the time fixed in the inner.
[0015]
According to a fourth aspect of the present invention, there is provided the needle moving method according to the first or third aspect, wherein a number other than a divisor of 60 is 36.
[0016]
According to a fifth aspect of the present invention, in the hand movement method according to the second or third aspect, the time zone including other information is the total date information from January 1, the last two digits year information, or the day of the week. Provide a hand movement method that is a time zone containing information.
[0017]
The present invention described in claim 6 provides a radio-controlled timepiece that performs the hand movement method described in any one of claims 1 to 5.
[0018]
[Action]
According to the first aspect of the present invention, from the start of the reception of the radio wave to the detection of the zero-second position marker by the receiving unit, the driving unit sets the hand movement of the hand to be greater than 1 and a divisor of 60. The drive is performed at intervals of seconds having a number other than the above, for example, at intervals of 36 seconds. For this reason, the noise generated by the driving unit only occurs at intervals of a number other than a divisor of more than 60 (for example, at intervals of 36 seconds), and during this interval, noise due to the hand driving is generated. Therefore, the interference of the hand driving noise of the stepping motor can be suppressed as much as possible when the receiving unit performs reception detection. Even if the zero-second position marker overlaps once with the periodic hand movement according to the method of the present invention, the zero-second position marker generation cycle is 60 seconds, and the hand movement cycle is greater than 1 and other than a divisor of 60. Since the interval is a number of seconds having a number (for example, an interval of 36 seconds), it does not overlap with the hand movement at the next generation timing of the zero-second position marker, and the zero-second position marker cannot be obtained twice consecutively. Can be avoided. For this reason, the receiving unit can detect a pulse with a one-second cycle from the standard time radio wave and detect a zero-second position marker in an environment in which noise interference from the driving unit is reduced as much as possible.
[0019]
According to the second aspect of the present invention, after the receiving unit detects the zero-second position marker, the driving unit controls the hand movement of the hands until the receiving unit acquires the information necessary for time correction. Within a one-minute cycle of radio waves, other information that is not required for time adjustment, such as the total number of days since January 1, the last two digits of the year, or a time zone including information on the day of the week is driven. . The one-minute cycle of the standard time radio wave also includes information that is not necessary for periodically correcting the time, other than minute information and hour information. After the detection of the zero-second position marker, a second frame in a time zone for receiving a signal including other information not necessary for such time correction can be specified within a one-minute cycle of the time information of the standard time radio wave. For example, the information of the total number of days from January 1 is 20 to 33 seconds after the zero second position marker, the last two digits of the year are 41 to 48 seconds, and the day of the week is 50. It is received in the time frame of the second frame to the 52 second frame. Therefore, after the receiving unit detects the zero-second position marker, the driving unit drives the hand movement of the hands during a time zone in which other information that is not necessary for periodic time updating is received. Therefore, time information such as minute information and time information necessary for periodic time correction can be obtained from the standard time radio wave while minimizing the influence of noise of the drive unit.
According to the third aspect of the present invention, since the hand movement method is changed before and after the detection of the zero-second position marker, both effects of the first and second aspects of the invention are effectively exhibited. Can be.
[0020]
According to the invention as set forth in claim 6, the receiving unit regularly receives the standard time radio wave without separating the driving unit of the noise generation source and the receiving unit and without adding a shield component. When extracting time information, it is necessary to minimize the occurrence of noise during hand movement by the drive unit that hinders the extraction of time information, and it is necessary to stop the hand movement of the time display hand while receiving time information. There is provided a radio-controlled timepiece that can be miniaturized.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[0022]
FIG. It is a block diagram showing roughly the function of electric wave modification timepiece 1 by one embodiment of the present invention. The radio-controlled timepiece 1 includes a reception antenna 2 for receiving a long-wave standard time radio wave (JJY) having a transmission frequency of 40 kHz or 60 kHz on which the time information shown in FIG. 3 is superimposed, and a transmission antenna having a transmission frequency of 40 kHz or 60 kHz. A tuning circuit 3 for selectively tuning and receiving one of them; a receiving unit 4 having means for amplifying and detecting (demodulating) the selectively received longwave standard time radio wave and outputting a detected signal b; Having. The time data extraction unit 5 detects the synchronization of the rectangular pulse having a one-second cycle shown in FIG. 3 and the zero-second position marker M from the detected signal b, and outputs a detection signal k. A signal h indicating the time of the 20-second frame (3a in FIG. 3) and the 50-second frame (3b in FIG. 3) after M is output. The time data extraction unit 5 further detects “0”, “1”, “P” bit data corresponding to the pulse width of the detected signal b from the detected signal b, and outputs the detected bit data c.
[0023]
The time correction unit 8 obtains time information by decoding the bit data c, and outputs correction information d for correcting the minute and hour of the current time stored in the current time storage unit 6 based on the time information. The correction signal e is output to the display drive control unit 7 of the step motor that drives the second hand, minute hand, and hour hand (not shown) that displays the current time. The analog display unit 9 performs analog time display with a second hand, minute hand, and hour hand (not shown) driven by the display drive control unit 7. The clock unit 10 as a reference signal output unit generates a time reference signal in the radio-controlled timepiece 1 in units of one second. The operation control unit 11 turns on / off the receiving unit 4 for the operation of receiving the long-wave standard time radio wave based on the information of the current time f from the current time storage unit 6 for the periodic time update. The signal a is output. Periodic time updating can be performed, for example, every day, at 2:00 am, etc., at a time when human activity and noise from the sun are relatively small.
[0024]
The time counting unit 12 receives a signal in units of one second from the clock unit 10, receives a signal a indicating the start of reception of the receiving unit 4 from the operation control unit 11, and receives a synchronization and zero The second position marker detection signal k is input, and a control signal i having a 1-second cycle, a 6-second cycle, or a 36-second cycle necessary for moving the second hand, the minute hand, and the hour hand is output to the display drive control unit 7, and the current time is stored. A signal g required for calculating and storing the current time is output to the unit 6.
[0025]
The display drive control unit 7 receives the control signal i having a one-second cycle from the time counting unit 12 except when the receiving unit 4 is receiving, and sets the second hand (not shown) of the analog display unit 9 at 1 step / second by a step motor (not shown). Similarly, a control signal i having a cycle of 6 seconds is received from the time counting section 12, and a minute hand and an hour hand (not shown) of the analog display section 9 are driven at a cycle of 1 step / 6 seconds by a step motor (not shown). The display drive control unit 7 controls the movement of the second hand (not shown) of the analog display unit 9 during the reception of the reception unit 4 from the start of reception until the signal k for detecting the zero-second position marker M is output to the time counting unit 12. The driving is stopped, and the control signal i having a cycle of 36 seconds is received from the time counter 12, and the minute hand and the hour hand (not shown) of the analog display section 9 are driven at a cycle of 1 step / 36 seconds. During reception by the receiving unit 4, the display drive control unit 7 controls the time data extraction unit 5 from the detection of the zero-second position marker M until the time correction unit 8 acquires time information necessary for time correction and corrects the time. Receives the signal h indicating the timing of the 20-second frame (3a in FIG. 3) and the 50-second frame (3b in FIG. 3) after the zero-second position marker M, and sets the minute hand and the hour hand (not shown) of the analog display unit 9 to 1 It is driven in a cycle of step / 30 seconds. The display drive control unit 7 also receives the time correction signals e and l from the time correction unit 8 and the current time storage unit 6, respectively, and corrects the time of the second hand, minute hand, and hour hand (not shown) of the analog display unit 9 to change the time. A signal j notifying that the correction operation has been completed is output to the time counter 12. The time data extraction unit 5, current time storage unit 6, time correction unit 8, clock unit 10, operation control unit 11, and time counting unit 12 are functions implemented by a CPU (not shown).
[0026]
Next, a method according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a flowchart showing a method for moving a radio-controlled timepiece according to one embodiment of the present invention. This hand movement method is executed by, for example, a CPU (not shown) included in the radio-controlled timepiece 1 shown in FIG.
[0027]
First, in the method shown in FIG. 2, after the start (step 21), if the ON signal a is not output from the operation control unit 11 and the signal is not being received (step 22), the method is performed based on the control signal i from the clock counting unit 12. It is determined whether or not it is time for the display drive control section 7 to drive the hands (step 23). When the reception is not being performed, the timing at which the display drive control unit 7 moves the hand is based on the control signal i having the 1-second cycle and the 6-second cycle output from the time counting unit 12, and the second hand is set every 1 second, and the minute hand and the hour hand are set for 6 seconds. It is every. If it is a timing to move the hand, the display drive control unit 7 drives the second hand of the analog display unit 9 by one step / 1 second by a step motor (not shown) based on the control signal i from the time counting unit 12, and moves the minute hand and the hour hand. Is driven for 1 step / 6 seconds (step 24). If it is not the timing to move the hands, the operation control unit 11 determines whether the time in the current time storage unit 6 has reached the regular reception time (step 25). Return. The reception time can be selected, for example, every day, at 2:00 am, etc., in a time zone where human activity and noise from the sun are relatively small. When the time of the current time storage unit 6 reaches the reception time, the operation control unit 11 outputs an ON signal a, and by this output, the time counting unit 12 outputs the output of the control signal i of the 1-second cycle and the 6-second cycle. Then, the driving of the second hand by the display drive control unit 7 is stopped (steps 26 and 27), and the process returns to step 22.
[0028]
If the ON signal a has been output and the signal is being received in step 22, the receiving unit 4 activates the circuit of the receiving unit 4 according to the ON signal a (step 28). In response to the input of the ON signal a to the clock counting unit 12, the clock counting unit 12 outputs the hand driving control signal i at intervals of 1 second or 6 seconds except during reception. The output is switched to the control signal i for the hand movement at 36-second intervals. When the time of the time counting unit 12 coincides with the hand movement synchronization at 36-second intervals (step 29), the display drive control unit 7 drives the minute and hour hands of the analog display unit 9 at 36-second intervals (step 30). ).
[0029]
Next, the time data extraction unit 5 performs synchronization at one-second intervals to encode bit data from the signal b shown in FIG. 3 received, amplified, and detected by the reception unit 4. As shown in FIG. 3, the signal b detected by the receiver 4 has a period of exactly one second unless the falling edge of the rectangular pulse (time code) has interference such as noise. The time data extraction unit 5 counts the elapsed time from the falling edge of the rectangular pulse (time code) of the detection signal b to the next falling edge by an internal stopwatch timer. The internal stopwatch timer can start and stop at an arbitrary timing, and the count has a resolution of 10 ms. If the interval between the falling edges of successive rectangular pulses (time code) is within a tolerance of 1 second (the tolerance of this embodiment is ± 20 ms), synchronization of 1 second is obtained. That is, it is determined that the count start timing of the stopwatch timer has been synchronized with the rectangular pulse generation timing, and thereafter the stopwatch timer autonomously performs a count reset operation at one-second intervals synchronized with the rectangular pulse generation timing (step 31). If the time data extraction unit 5 does not detect the rectangular pulse synchronized with the one-second interval in the signal b as described above, it is determined that the signal including the rectangular pulse (time code) shown in FIG. Is determined to have not succeeded yet, and the process returns to step 29.
[0030]
If the time data extraction unit 5 synchronizes for one second, it means that the reception unit 4 has successfully received the signal including the time code shown in FIG. 3, and then the time data extraction unit 5 In order to detect the zero-second position marker M, the duration of the rectangular pulse indicated as the count value of the stopwatch timer when the rising edge of the rectangular pulse (time code) shown in FIG. 3 occurs, that is, the pulse width is measured. . If the count value of the stopwatch timer when the rising edge of the rectangular pulse (time code) shown in FIG. 3 is in the range of "650 ms to 990 ms", the time data extraction unit 5 sets "0", "350 ms to It is set to determine three types, "1" if it falls within "640 ms" and "P" if it falls within "0 ms to 340 ms". These correspond to the pulse widths of the three types of rectangular pulses (time codes) in FIG. 3, 800 ms, 500 ms, and 200 ms, respectively, and include a binary code “0”, a binary code “1”, and a position marker “ P "respectively. When the stopwatch timer of the time data extraction unit 5 detects two consecutive position markers “P” in a one-second cycle, the second position marker is the zero-second position marker M, and the zero-second position is acquired. When the zero-second position marker M is detected, the zero-second position is obtained, and the zero-second position marker detection signal k is output, the time counting unit 12 outputs a 36-second cycle signal i to the display drive control unit. Stop.
[0031]
If the time of the time counting section 12 reaches the hand operation synchronization at intervals of 36 seconds before the time data extracting section 5 detects the zero-second position marker M (step 32), the display drive control section 7 sets the analog display. The minute hand and the hour hand of the unit 9 are driven at 36-second intervals (step 33). If the detection signal k for detecting the zero-second position marker M is not received, the process returns to step 32.
[0032]
As described above, while the receiving unit 4 is receiving, the synchronization is performed for one second from the rectangular pulse in the detection signal b, and it is longer than one second until the zero-second position marker M is detected and the zero-second position is obtained. The minute hand and the hour hand are driven at 36-second intervals. As a result, the generation of noise due to the hand movement is minimized. In addition, since the zero-second position marker M has a 60-second cycle, even if the zero-second position marker M may overlap with the hand-driving in the 36-second cycle, it is possible to prevent the two consecutive overlaps. . In this manner, the successful reception of the signal including the time code shown in FIG. 3 and the detection of the zero-second position marker M are facilitated.
[0033]
When the time coefficient unit 12 receives the detection signal k for detecting the zero-second position marker from the time data extraction unit 5 (step 34), the time counting unit 12 outputs a 36-second cycle signal i to the display drive control unit. To stop. Then, the display drive control unit 7 receives the signal h indicating the positions of the 20-second frame (3a in FIG. 3) and the 50-second frame (3b in FIG. 3) after the detection of the zero-second position marker M from the time data extraction unit 5. The display drive control unit 7 drives the minute hand and the hour hand (not shown) of the analog display unit 9 at a cycle of 1 step / 30 seconds (step 36). As described above, the time information received in the one-minute cycle includes information that is not necessary for periodic time adjustment, such as the total number of days since January 1, the last two digits of the year, or the day of the week. Since the minute hand and the hour hand are driven only in the time frame of the second frame, the noise accompanying the hand movement interferes with the received signal, and the time data extraction unit 5 needs to perform the time correction periodically. , Hour information, minute information, parity information, etc. can be prevented from being lost.
[0034]
The time correction unit 8 decodes the bit data of “0”, “1”, and “P” output from the time data extraction unit 5 to acquire time information, and stores the current time with the acquired hour and minute information d. The current time stored in the section 6 is corrected, and a correction signal e is sent to the display drive control section 7. Upon receiving the correction signal e, the display drive control unit 7 corrects the positions of the hour hand and the minute hand on the analog display unit 9 based on the corrected hour information and minute information 1 from the current time storage unit 6, The second hand is placed at the zero-second position (step 38), and after the next zero-second position marker detection signal k, the reception end signal j is sent to the time counting unit 12 to start the normal movement of the second, minute and hour hands, The on signal a is turned off, the receiving unit 4 is turned off, and the process ends (step 39). If the time correction data extraction unit 5 cannot obtain the hour information and minute information necessary for time correction, the process returns to step 35.
[0035]
As described above, according to the method of the present invention, the driving of the second hand is stopped from the start of reception until the zero second position is acquired, and only the hour hand and the minute hand are set to the 36-second period signal (or 60, which is larger than 1). The hand is driven by another number of second period signals which are not a divisor. For this reason, it is possible to obtain a one-second periodic signal from the received signal while minimizing the influence of noise accompanying the hand driving. Further, even if the zero-second position marker of the 60-second cycle overlaps with the hand driving of the hour hand and the minute hand of the 36-second cycle, the zero-second position marker may not be detected from the received signal due to noise during the hand driving. Since the two do not overlap continuously, the zero-second position marker can be easily detected. Furthermore, if the hand movement cycle remains 36 seconds after the detection of the zero-second position marker, the reliability of the bit data of the received signal may be reduced due to the influence of noise during the hand movement. That is, if the noise caused by the hand driving in the 36-second cycle and the bit data representing hour information, minute information, parity information, and the like temporally overlap, data may not be detected accurately. For this reason, after detecting the zero-second position marker, remove the second frame containing the data that the radio-controlled clock is scheduled to acquire for periodic time correction such as time information and parity information, and set the minute and hour hands. Drive the hands. In the above-described embodiment, the minute hand and the hour hand are driven in a one-step / 30-second cycle at the generation timing of the 20-second frame and the generation timing of the 50-second frame. In this way, if the hand movement timing during reception is selected so as not to affect the time code required for time correction, time information necessary for time correction can be obtained in a stable reception state without noise.
[0036]
The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the minute hand and the hour hand are driven to move at intervals of 36 seconds from the start of reception to the detection of the zero-second position marker. The hands may be moved at other numbers, for example, at intervals of 24 seconds or at intervals of 42 seconds.
[0037]
In the above-described embodiment, the display drive control unit 7 performs the time data extraction after the zero-second position marker M is detected until the time correction unit 8 acquires the time information necessary for the time correction and corrects the time. The unit 5 receives a signal indicating the 20-second frame and the 50-second frame after the zero-second position marker M from the unit 5 and sets the minute hand and the hour hand (not shown) of the analog display unit 9 to 1 step / 30 for the 20-second and 50-second frames only. Although the drive is performed in a cycle of seconds, a second frame including other information that is not necessary for time correction may be used instead. For example, when calendar information (the total date from January 1, the last two digits of the Christian era, the day of the week, etc.) is included as information necessary for time correction, the hands may be moved at the timing of a 57-second frame.
[0038]
The method of the present invention is used when a radio-controlled timepiece receives radio waves to periodically correct the time. When the radio-controlled timepiece is reset, the operation of the second hand, the minute hand, and the hour hand can be completely stopped to receive radio waves. This is because even if the hand movement is stopped at the time of resetting, the user does not mistakenly think that the battery of the watch has run out or a malfunction has occurred.
[0039]
【The invention's effect】
According to the hand movement method of the radio-controlled timepiece of the present invention, the generation of noise by the stepping motor that drives the hand during the reception of the regular standard time radio wave can be minimized, and the acquisition of the time information is not hindered. According to the present invention, without adding components such as shield components, even if the receiving unit and the driving unit are arranged close to each other, the receiving unit can receive the time information without being affected by the noise of the hand driving by the step motor of the driving unit. Because it can be acquired, it is suitable for miniaturization of analog type radio-controlled watches.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing a configuration of a radio-controlled timepiece according to one embodiment of the present invention.
FIG. 2 is a flowchart showing a method of moving the hands of the radio-controlled timepiece according to one embodiment of the present invention.
FIG. 3 is a time code format including time information transmitted by a long-wave standard time radio wave.
[Explanation of symbols]
1 radio wave correction clock
2 Receiving antenna
3 Tuning circuit
4 Receiver
5 Time data extraction unit
6 Current time storage
7 Display drive control unit
8 Time correction section
9 Analog display section
10 Clock section
11 Operation control unit
12 Time counting section

Claims (6)

In order to obtain the information required for time correction, a receiving unit that receives a standard time radio wave that includes time information including a zero-second position marker in a one-minute cycle, represented by a one-second cycle pulse, and displays the time A driving unit for driving the hands to move the hands,
From the start of reception of the radio wave by the receiving unit to the detection of the zero-second position marker, the driving unit moves the hands of the hands at intervals of a number of seconds greater than 1 and a number other than a divisor of 60. A needle driving method characterized in that the needle is driven in a cycle of (i). In order to acquire the information necessary for time correction, a standard time radio wave including information necessary for time correction including a zero second position marker and other information different from the information required for time correction in a one minute cycle is received. A hand movement method of a radio-controlled timepiece including a receiving unit and a drive unit for driving a hand for displaying a time,
After the receiving unit detects the zero second position marker, until the receiving unit acquires the information necessary for time correction, the driving unit moves the hands of the hands within one minute cycle of the standard time radio wave. A hand driving method characterized in that driving is performed only in a time zone including other information not required for time adjustment. In order to obtain the information necessary for time correction, information necessary for time correction including a zero-second position marker, represented by a pulse of one second cycle, and other information different from the information required for time correction are added for one minute. A receiving method for receiving a standard time radio wave included in a cycle, and a driving method for a radio-controlled timepiece including a driving unit for driving a hand for displaying a time,
From the start of reception of the radio wave by the receiving unit to the detection of the zero-second position marker, the driving unit moves the hands of the hands at intervals of a number of seconds greater than 1 and a number other than a divisor of 60. Drive with the cycle of
After the receiving unit detects the zero second position marker, until the receiving unit acquires the information necessary for time correction, the driving unit moves the hands of the hands within one minute cycle of the standard time radio wave. A hand driving method characterized in that driving is performed only in a time zone including other information not required for time adjustment. The hand operation method according to claim 1 or 3, wherein the number other than the divisor of 60 is 36. The time zone including the other information is a time zone including total day information from January 1, last two digits year information, or day of the week information. Hand movement method. A radio-controlled timepiece that performs the hand movement method according to claim 1.

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