JP6558289B2 - Electronic timepiece and control method of electronic timepiece - Google Patents

Description

  The present invention relates to an electronic timepiece and an electronic timepiece control method, and more particularly to an electronic timepiece and an electronic timepiece control method for receiving a standard radio wave that transmits information in which two bit data are combined with a one-second signal.

A general standard radio wave transmits three types of signals “0”, “1”, “P”, and “M” as signals per second. On the other hand, the British standard radio wave “MSF” has two types of bit data, bitA and bitB, in a one-second signal. For this reason, in “MSF”, a total of five types of signal waveform patterns including four types of combinations of two bits and markers are transmitted as signals per second. Note that there are four types of combinations of two bits A and B: “00”, “01”, “10”, and “11”.
In order to determine the time code of this MSF, five level determination periods from A to E are set in advance per second, and it is detected whether the signal level is H level or L level in each determination period. A method for determining the five types of signal waveform patterns based on combinations of the H level and the L level in the five determination periods has been proposed (see Patent Document 1).

JP 2012-163541 A

However, in Patent Document 1, since the signal level is determined in five level determination periods, and the time code is determined based on the combination of the determination results, the processing is complicated.
For this reason, adoption of a simple determination method in which the time code is determined based on the total value of the H level signal width in one second when the signal rises from the L level to the H level at the second synchronization timing has been studied.
However, in “MSF”, two 100 ms H level signals are transmitted across a 100 ms L level signal, bitA = 0, bitB = 1 signal, and 200 ms H level signal are transmitted bitA = 1. , BitB = 0 signals both have a problem that the total value of the H level signal width is 200 ms and cannot be distinguished.

  Such a problem occurs in a standard radio wave that transmits a time code using a signal that changes between a first level (for example, H level) and a second level (for example, L level). This is a common problem in standard radio waves including two types of signals having the same total signal width of one level and different signal waveform patterns.

  An object of the present invention is to provide an electronic timepiece and a method for controlling an electronic timepiece that can easily determine two types of signals having the same total value of the first level signal widths for one second and different signal waveform patterns. It is in.

  The electronic timepiece of the present invention includes a first level signal and a second level signal per second, and a signal including two types of bit data per second in combination with the first level signal and the second level signal. A receiving unit that receives a standard radio wave that transmits a signal, a calculating unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the receiving unit, and a code that determines a code of the signal A determination unit, wherein the signal includes a first code and a second code having the same total signal width of the first level signal for one second, and the first code is the first level signal for one second. , The second code is a code that transmits two of the first level signals per second, and the code determination unit is configured such that the total value calculated by the calculation unit is The first code or the second code It is determined whether or not it is the same as the total value of the signal width of the first level signal in the case, and if it is determined to be the same, it is set according to the signal waveform pattern of the second code in one second In the determination period, it is determined whether or not the second level signal has continued for a predetermined time. If it is determined that the second level signal has not continued for the predetermined time, it is determined that the first code has been received. .

According to the present invention, when a standard radio wave including two types of codes of the first code and the second code having the same total signal width of the first level signal for one second is received and the code is determined, When the second level signal does not continue for a predetermined time in the determination period set according to the signal waveform pattern of two codes, it is determined that the first code has been received. Therefore, the code determination unit detects whether the first code is the first code by detecting the total value of the signal widths of the first level signal and whether the second level signal continues for a predetermined time in the determination period. Since the determination can be made, the determination process can be easily performed.
When the second level signal continues for a predetermined time, it may be determined that the second code has been received, or the signal position of the signal for one second (any position from 0 to 59 seconds). Depending on, the code may be determined.

  The electronic timepiece of the present invention includes a first level signal and a second level signal per second, and a signal including two types of bit data per second in combination with the first level signal and the second level signal. A receiving unit that receives a standard radio wave that transmits a signal, a calculating unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the receiving unit, and a code that determines a code of the signal A determination unit, wherein the signal includes a first code and a second code having the same total signal width of the first level signal for one second, and the first code is the first level signal for one second. , The second code is a code that transmits two of the first level signals per second, and the code determination unit determines that a signal of 1 second to be determined is a signal of 60 seconds. For frames composed of signals Then, the signal position indicating the signal number of the second is detected, and the total value calculated by the calculation unit is the total value of the signal width of the first level signal in the first code or the second code. The first code and the second code are determined based on the signal position when it is determined that they are the same.

According to the present invention, when a standard radio wave including two types of codes of the first code and the second code having the same total signal width of the first level signal for one second is received to determine the code, The first code and the second code can be determined according to the signal position of the target signal for one second (any position from 0 to 59 seconds). For example, if the signal position has no possibility of the first code, it is determined as the second code, and if it is the signal position without the possibility of the second code, it may be determined as the first code.
For this reason, the code determination unit can determine whether the code is the first code or the second code by detecting the total value of the signal width of the first level signal and the signal position. It can be done easily.

  The electronic timepiece of the present invention includes a first level signal and a second level signal per second, and a signal including two types of bit data per second in combination with the first level signal and the second level signal. A receiving unit that receives a standard radio wave that transmits a signal, a calculating unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the receiving unit, and a code that determines a code of the signal A first code and a second code having the same total signal width of the first level signal for one second and a total value of the signal width of the first level signal for one second. The first code and a third code that is ½ of the second code, the first code is a code that transmits one first level signal per second, and the second code is 2 for the first level signal per second A code to be transmitted, the third code is a code for transmitting one first level signal per second, and the code determination unit is configured such that a signal for 1 second to be determined is a signal for 60 seconds A signal position indicating how many seconds the signal is in a frame to be detected, and the total value calculated by the calculation unit is the signal width of the first level signal in the first code or the second code If the signal position is not likely to include the second code, the signal of the second code in one second is determined. In the determination period set according to the waveform pattern, it is determined whether or not the second level signal has continued for a predetermined time. If it is determined that the second level signal has continued for the predetermined time, it is determined that the third code has been received. And said place When it is determined that no duration, and judging that it has received the said first code.

According to the present invention, the first code and the second code having the same total signal width of the first level signal for one second, and the third code whose signal width of the first level signal is half of the first code. When the standard radio wave including three types of codes is received and the code is determined, if there is no possibility that the signal position includes the second code, the determination period set according to the signal waveform pattern of the second code is used. When the second level signal does not continue for a predetermined time, it is determined that the first code has been received, and when the second level signal has continued for the predetermined time, it is determined that the third code has been received.
Therefore, the code determination unit detects the first code by detecting the total value of the signal width of the first level signal, whether or not the second level signal continues for a predetermined time in the determination period, and the signal position. Or the third code, the determination process can be easily performed. In particular, at a signal position where there is no possibility of the second code, it is possible to determine the third code in consideration of the possibility of the influence of noise, so that highly accurate code determination can be performed.

  The electronic timepiece control method according to the present invention includes a first level signal and a second level signal per second, and two types of bit data per second by combining the first level signal and the second level signal. A control method of an electronic timepiece including a receiving unit that receives a standard radio wave that transmits a signal including a first code and a second code that have the same total signal width of the first level signal for one second. The first code is a code that transmits one of the first level signals per second, and the second code is a code that transmits two of the first level signals per second, A step of calculating a total value of signal widths of the first level signal for one second of the signal received by the receiving unit; and the calculated total value is the first code in the first code or the second code. Level signal In the determination period set according to the signal waveform pattern of the second code in one second when it is determined that the step is the same as the total value of the widths, The method includes a step of determining whether or not the level signal has continued for a predetermined time, and a step of determining that the first code has been received when it is determined that the level signal has not continued for the predetermined time.

  The electronic timepiece control method according to the present invention includes a first level signal and a second level signal per second, and two types of bit data per second by combining the first level signal and the second level signal. A control method of an electronic timepiece including a receiving unit that receives a standard radio wave that transmits a signal including a first code and a second code that have the same total signal width of the first level signal for one second. The first code is a code that transmits one of the first level signals per second, and the second code is a code that transmits two of the first level signals per second, In the step of calculating the total value of the signal width of the first level signal for 1 second of the signal received by the receiving unit, and the frame for which the signal of 1 second to be determined is composed of the signal of 60 seconds, Is the second signal And a step of determining whether the calculated total value is the same as the total value of the signal width of the first level signal in the first code or the second code. And determining the first code and the second code based on the signal position when it is determined that they are the same.

The electronic timepiece control method according to the present invention includes a first level signal and a second level signal per second, and two types of bit data per second by combining the first level signal and the second level signal. A control method for an electronic timepiece having a receiving unit that receives a standard radio wave that transmits a signal including a first code and a second code that have the same total signal width of the first level signal for one second. And a third code whose signal width of the first level signal for one second is 1/2 of the first code and the second code, and the first code is The first code is a code that transmits one first level signal, the second code is a code that transmits two first level signals per second, and the third code is the first level signal transmitted per second. Is a code to send one The step of calculating the total value of the signal width of the first level signal for 1 second of the signal received by the receiving unit, and the number of seconds in the frame in which the 1 second signal to be determined is composed of 60 second signals Detecting a signal position indicating whether the signal is an eye signal, and whether the calculated total value is the same as a total value of signal widths of the first level signal in the first code or the second code If the signal position is not likely to contain the second code, it is set according to the signal waveform pattern of the second code in 1 second. A step of determining whether or not the second level signal has continued for a predetermined time in the determined determination period, and a step of determining that the third code has been received if it is determined that the second level signal has continued for the predetermined time. And-up, when it is determined that not continued the predetermined time is characterized by having a determining that it has received the first code.
According to the control method of each of these electronic timepieces, the same operational effects as the electronic timepiece can be obtained.

1 is a block diagram showing a configuration of an electronic timepiece according to a first embodiment of the present invention. It is a figure which shows the signal waveform pattern of British standard radio wave "MSF". It is a figure which shows the time code format of the standard radio wave "MSF" of England. It is a flowchart which shows the code | cord | chord determination process of 1st Embodiment. It is a flowchart which shows the code | cord | chord determination process of 1st Embodiment. It is a flowchart which shows the code | cord | chord determination process of 2nd Embodiment. It is a flowchart which shows the code | cord | chord determination process of 2nd Embodiment. It is a flowchart which shows the code | cord | chord determination process of 3rd Embodiment.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[Configuration of electronic watch]
FIG. 1 is a block diagram showing an internal configuration of the electronic timepiece 1.
The electronic timepiece 1 is a radio-controlled timepiece capable of receiving a British standard radio wave MSF, and includes a time display unit 2 that displays time, a reception unit 5 that receives radio waves including time information using an antenna 4, and a reference signal. Are provided with an oscillation circuit 6 and a frequency dividing circuit 7 serving as a reference signal source for outputting the signal, and a control means 10 for controlling the operation of the entire apparatus.

The time display unit 2 includes a general pointer used in an analog timepiece, a display wheel (day wheel, day wheel) on which the date and day of the week are printed, and a motor and a wheel train that drive these. . Specifically, although not shown, a dial, hour hand, minute hand, and second hand that are hands, and a calendar wheel such as a date wheel and a day wheel for displaying a date and a day of the week are provided.
Note that both the date wheel and the day wheel may be provided, only one of them may be provided, or both may not be provided. These are set in consideration of the design of each clock.
Further, a step motor is generally used as the motor, but various drive mechanisms capable of moving a pointer such as a piezoelectric actuator may be used.
The time display unit 2 is not limited to the one provided with the hands and the calendar wheel, and may be constituted by a display device such as a liquid crystal panel or an organic EL (Electro Luminescence) panel.

The antenna 4 is a general antenna that can be incorporated in the electronic timepiece 1, such as a bar antenna that can receive standard radio waves.
The receiving unit 5 has the same configuration as a general standard radio wave receiving circuit connected to the antenna 4, and includes a tuning circuit (not shown) configured by a tuning capacitor or the like.

Although not shown, the receiving unit 5 includes an amplifier circuit, a bandpass filter, a demodulator circuit, a decode circuit, etc., and binarizes the received long wave standard radio wave as a TCO (Time Code Out) signal, Output to the control means 10.
At this time, since the long wave standard radio wave transmits a signal modulated by amplitude modulation, there are a period in which the amplitude is large and a period in which the amplitude is small. The receiving unit 5 binarizes the signal level of the received signal into a high level (H level) and a low level (L level) according to the change in amplitude, and outputs it as a TCO. At this time, depending on the circuit configuration of the receiving unit 5, when the amplitude is large, the received signal may be output as an H level and may be output as an L level. For this reason, the received signal changes from the first level to the second level per second, but the first level may be H level or L level, and the second level is different from the first level. It becomes. Since the receiving unit 5 of the present embodiment outputs a TCO signal that rises from the L level to the H level at the start position (second synchronization timing) of 1 second, the first level is the H level and the second level is the L level. Is set to

The receiving unit 5 is controlled by the control means 10 and configured to receive the long wave standard radio wave having the frequency set by the tuning circuit by the antenna 4.
The frequency of the standard radio wave is set according to the type of standard radio wave to be received. The electronic timepiece 1 of the present embodiment is set to be able to receive a standard radio wave of 60 kHz in order to receive at least the British standard radio wave “MSF”. The electronic timepiece 1 is configured to be able to receive a standard radio wave other than the MSF, and the frequency is set according to the type of the standard radio wave to be received.
For example, if the standard radio wave to be received is Japanese standard radio wave “JJY”, the receiving unit 5 is set to 40 kHz or 60 kHz, and if the standard radio wave “WWVB” in the United States is set to 60 kHz, the German standard radio wave “DCF77” is set. ”Is set to 77.5 kHz, and the Chinese standard radio wave“ BPC ”is set to 68.5 kHz.
The selection of the standard radio wave may be performed manually by the user, or the electronic timepiece 1 may be automatically selected by automatically switching the frequency or the like.

[Standard British radio wave MSF]
Here, the British standard radio wave “MSF” will be described.
As shown in FIG. 2, the MSF transmits signals of five signal waveform patterns every second in order to distinguish four types of combinations of bitA and bitB from markers. In the present embodiment, each signal rises from the L level (second level) to the H level (first level) at the beginning of one second (second synchronization timing), and the signal width of the H level signal (first level signal) is changed. These are signals of five different signal waveform patterns.
In the case of “bitA = 0, bitB = 0”, the head of 1 second (0 ms) to 100 ms is an H level signal, and the remaining 900 ms is an L level signal. That is, the H level signal width is 100 ms.
When “bitA = 0, bitB = 1”, 100 ms from the beginning of 1 second is an H level signal, the next 100 ms is an L level signal, the next 100 ms is an H level signal, and the remaining 700 ms is This is an L level signal. That is, two H level signals are transmitted per second, and the total value of the H level signal width is 200 ms.
In the case of “bitA = 1, bitB = 0”, 200 ms from the head of 1 second is an H level signal, and the remaining 800 ms is an L level signal. That is, the H level signal width is 200 ms.
In the case of “bitA = 1, bitB = 1”, 300 ms from the beginning of 1 second is an H level signal, and the remaining 700 ms is an L level signal. That is, the H level signal width is 300 ms.
In the case of “marker”, 500 ms from the head of one second is an H level signal, and the remaining 500 ms is an L level signal. That is, the H level signal width is 500 ms.

Here, “bitA = 0, bitB = 1” and “bitA = 1, bitB = 0” have different signal waveform patterns, but the total value of the H level signal width is the same at 200 ms. “BitA = 1, bitB = 0” transmits one first level signal per second, and “bitA = 0, bitB = 1” transmits two first level signals. For this reason, in this embodiment, “bitA = 1, bitB = 0” corresponds to the first code, and “bitA = 0, bitB = 1” corresponds to the second code.
“BitA = 0, bitB = 0” transmits one first level signal per second, and its H level signal width is 100 ms, which is 1 of the H level signal width of the first code and the second code. / 2. Therefore, “bitA = 0, bitB = 0” corresponds to the third code.

As shown in FIG. 3, the British standard radio wave (MSF) time code format is configured such that one type of signal (signal waveform pattern) is transmitted every second and one frame is formed in 60 seconds. In MSF, 0 second is a marker, and bit A from 1 second to 16 seconds may be changed in the future, but is currently set to “0” and bit B is set to D. D indicates data of DUT1 (difference between UT1 which is one of universal time and Coordinated Universal Time UTC), and is data which is not used for normal time correction or the like.
Bit A from 17 seconds to 51 seconds is data indicating YY (year), MM (month), DM (day), DW (day of the week), H (hour), and M (minute), and obtains time information from these data it can. Although bit B from 17 seconds to 51 seconds may be changed in the future, it is currently set to “0” and is not used for acquiring time information.
Bit A from 53 seconds to 58 seconds is set to “1”, and bit B is data indicating CH (summer time switching notice bit), P (parity), and ST (summer time bit).
The data of 52 seconds and 59 seconds is “0” for both bitA and bitB.

As shown in FIG. 1, the oscillation circuit 6 includes a reference signal source (not shown) such as a crystal resonator, and oscillates the reference signal source at a high frequency and outputs an oscillation signal generated by the high frequency oscillation to the frequency divider circuit 7. To do.
The frequency divider circuit 7 receives and divides the oscillation signal output from the oscillation circuit 6. The frequency dividing circuit 7 outputs a predetermined reference signal, for example, a 1 Hz pulse signal to the control means 10.

[Configuration of control means]
The control means 10 is constituted by a circuit on which, for example, an IC (Integrated Circuit) or various electric components are mounted, and implements time measurement and time correction of the electronic timepiece 1.
As shown in FIG. 1, the control means 10 includes a storage unit 11, a detection unit 12, a code determination unit 13, a calculation unit 14, a time information acquisition unit 16, and a timer unit 17.

The storage unit 11 stores a reception signal (TCO signal) output from the reception unit 5.
The detection unit 12 samples the reception signal stored in the reception unit 5 at a predetermined sampling period. In this embodiment, since the sampling frequency is 128 Hz, the sampling period is 1000 ms / 128 = about 7.8 ms (milliseconds).
The detection unit 12 detects the signal level at each sampling timing (approximately 7.8 ms interval), confirms the timing at which the received signal has changed from the second level to the first level, and the change timing is 1 second. The timing is detected to establish second synchronization, and the start position of the 1 second signal is detected.

The code determination unit 13 acquires information on the received signal such as the signal level at the time of each sampling in the detection unit 12 and the second synchronization timing, and uses this information to generate a signal waveform pattern for each second of the received signal. Determine and get bitA and bitB data. A determination method in the code determination unit 13 will be described later.
The calculation unit 14 includes a signal level at the time of sampling from the code determination unit 13, and includes an H level signal counter and an L level signal counter that respectively count the number of samplings that satisfy the following two conditions.

  The H level signal counter (first level signal counter) counts the number of samplings that were at the H level (first level) in the signal for 1 second. This count number N is the total value of the signal widths of the H level signal (first level signal) in one second. Since the total value is the width dimension of all H level signals in one second, the total value (count number N) is also referred to as the total width.

  The L level signal counter counts the number of samplings in which an L level signal (second level signal) is continuously detected in a predetermined determination period in a signal for one second. This count number M is a predetermined time T during which the L level signal (second level signal) continues within the determination period.

The code determination unit 13 is 1 to 59 in a frame composed of the signal width of the H level signal calculated by the calculation unit 14, the signal width of the L level signal within the determination period (predetermined time T), and a signal of 60 seconds. The bit data (code) of the signal for each 1 second is determined based on the signal position indicating the position of the second signal.
The signal position can be detected by detecting the marker position (0 second position) shown in FIG.

The time information acquisition unit 16 acquires a time code (time information) from the code determined (decoded) by the code determination unit 13. That is, in the standard radio wave, time information is represented by a time code of one cycle and 60 seconds (60 bits), so the time information acquisition unit 16 acquires time information by acquiring a code of 60 bits.
Further, the time information acquisition unit 16 determines whether the acquired time information is the correct time based on one of the following two conditions.
The first condition determines whether the received time information matches the time measured by the time measuring unit 17.
The second condition is to compare the received time information, each time information is different by the reception interval, and if the reception interval is adjusted, it is determined whether there is a predetermined number of pieces of time data that match. . For example, since the time information is transmitted at intervals of 60 seconds, if time information is continuously received for 7 minutes, each time information should have a time different by 1 minute in the order received. Accordingly, it is determined whether or not the reception time information matches each reception time information by adjusting the difference in reception timing.
If either one of the above two conditions is met, the time information acquisition unit 16 determines that the correct time information has been acquired and outputs the time information to the time measurement unit 17.

  The time measuring unit 17 measures time based on a reference clock (1 Hz) input via the oscillation circuit 6 and the frequency dividing circuit 7 and receives reception time information from the time information acquisition unit 16, The internal time data) is corrected to the reception time information to adjust the time.

  The time display unit 2 displays the time measured by the time measuring unit 17. For example, in the case of an analog display type timepiece having hands, the motor is controlled to control the hand movement of each hand to indicate the reception time. In the case of a digital display timepiece using a liquid crystal panel or the like, the time is displayed using the display device.

[Receiving operation of electronic watch]
Next, the standard radio wave reception processing operation in the electronic timepiece 1 as described above will be described with reference to the flowcharts of FIGS. 4 and 5, the H level signal is abbreviated as H signal, and the L level signal is abbreviated as L signal.
The control means 10 of the electronic timepiece 1 activates the reception unit 5 via the antenna 4 when a regular reception time comes or when a forced reception operation is performed by operating an external operation member such as a button. Then, reception of standard radio waves is started (S1).
The control means 10 confirms whether the receiving station is set to “MSF” (S2). For this reason, the control means 10 selects a receivable station when the receiving station is set to “MSF” by manual operation of an external operation member and reception control is started, or the receiving station is automatically changed. In the automatic reception process, when “MSF” is automatically selected, “YES” is determined in S2.
If it is determined “NO” in S2, the control means 10 shifts to reception processing control of other stations other than “MSF” (S100).

When it is determined “YES” in S2, the control means 10 executes a second start position acquisition process (second synchronization process) (S3).
When the second start position acquisition process (S3) is executed, the detection unit 12 samples the reception signal stored in the storage unit 11 at, for example, 128 Hz, and the signal level changes from the L level (second level) to the H level (second level). The rising timing that changes to the first level is detected, and if the rising timing interval is 1 second (for example, 1 second ± 62.5 ms), the timing is determined as the second start position and acquired.

Next, the code determination part 13 of the control means 10 acquires the start position of time data (S4). As shown in FIG. 3, in the MSF, since the marker is transmitted at the 0 second position, the start position of the time data can be acquired by detecting the signal having the H level signal width of 500 ms.
The signal width of the H level signal can be detected by the number of times the H level is detected continuously by sampling. For example, when sampling is performed at 128 Hz, the signal level is detected at intervals of 1000 ms / 128 = 7.8125 ms. Therefore, the calculation unit 14 samples the TCO signal stored in the storage unit 11 at 128 Hz, calculates the number of samples in which the H level signal is detected continuously, and outputs the sampled number to the code determination unit 13. The code determination unit 13 determines the start position of the marker, that is, the time data, when the sampling number is within a range (for example, a range of 61 times or more and 67 times or less) set around 64 times at 500 ms. get. Thereby, in the following signal determination processing, the code determination unit 13 can detect the signal position to be determined, that is, which signal from 1 to 59 seconds is determined.

When the start position of the time data is acquired, the code determination unit 13 determines the data of each bit from the signal waveform pattern every second. The following description is divided into a case where a signal of 1 to 16 seconds is processed, a case of processing a signal of 17 to 52 seconds or 59 seconds, and a case of processing a signal of 53 to 58 seconds. To do.
As shown in FIG. 3, since the signal of 1 to 16 seconds is a signal set to bitA = 0, it can be determined by a common method. Further, since the signals of 17 to 52 seconds and 59 seconds are signals set to bitB = 0, they can be determined by a common method. Since the signal of 53 to 58 seconds is a signal set to bitA = 1, it can be determined by a common method.

[Signal judgment for 1 to 16 seconds]
First, processing when a signal of 1 to 16 seconds is determined will be described.
The code determination unit 13 first determines whether the data to be processed is 17 to 52 seconds or 59 seconds of time data (S5).
In the case of processing the signal of 1 to 16 seconds, the code determination unit 13 determines “NO” in S5, and the processing target data is 53 to 58 seconds of the time data as shown in FIG. Is determined (S6), and "NO" is determined in S6.

Next, the code determination unit 13 determines whether the data to be processed is 1 to 16 seconds of time data (S7), and determines “YES” in S7.
Next, the code determination unit 13 determines whether or not the total width (count number N) of the H level signal calculated by the calculation unit 14 is 200 ms (S8).
The code determination unit 13 determines that the total width of the H level signal is 200 ms when the count number N output from the calculation unit 14 is within a preset first determination range. The first determination range is, for example, a sampling count of 23 times (23 × 1000/128 = about 180 ms) or more and 29 times (about 227 ms) or the like, but the first determination range may be set as appropriate.
The code determination unit 13 determines “YES” in S8 if the N is within the first determination range, and determines “NO” in S8 if it is out of the first determination range.

When the code determination unit 13 determines “YES” in S8, the determination target 1-second signal is determined as bitA = 0 and bitB = 1 (S9). That is, as shown in FIG. 2, in MSF, the total width of the H level signal is 200 ms in two cases, bitA = 0 and bitB = 1, and bitA = 1 and bitB = 0. .
On the other hand, the object to be determined in S8 is a signal of 1 to 16 seconds, and during this period, bitA = 0 is fixed as shown in FIG. Therefore, it can be determined that bitA = 0 and bitB = 1 are received from the two types of signals.

If the code determination unit 13 determines “NO” in S8, the code determination unit 13 determines whether the total width of the H level signal is 100 ms (S10). Also in S10, the code determination unit 13 determines whether or not the count number N is within a second determination range for determining 100 ms. For example, the second determination range may be set such that the number of samplings is 10 times or more and 15 times or less.
When the code determination unit 13 determines “YES” in S10, the determination target signal of 1 second is determined as bitA = 0 and bitB = 0 (S11). That is, as shown in FIG. 2, in the MSF, the total width of the H level signal is 100 ms only when bitA = 0 and bitB = 0. The target to be determined in S10 is a signal of 1 to 16 seconds, and during this period, as shown in FIG. 3, bitA = 0 is fixed, and signals of bitA = 0 and bitB = 0 are also included. Therefore, if “YES” is determined in S10, it can be determined that bitA = 0 and bitB = 0 are received.

If it is determined “NO” in S7, the code determination unit 13 should have determined the marker at the 0-second position, and therefore determines whether the total width of the H level signal is 500 ms ( S12). As described above, the determination method in S12 can be determined based on whether the count number N is 61 times or more and 67 times or less.
If the code determination unit 13 determines “YES” in S12, it determines the 1-second signal to be determined as a “marker” (S13).
If the code determination unit 13 determines “NO” in S12, the code determination unit 13 determines that the marker is affected by noise or the like because it does not correspond to the 0 second condition as a marker, and performs error data determination (S14).
Similarly, if the code determination unit 13 determines “NO” in S10, the code determination unit 13 determines that the signal is affected by noise or the like because it does not correspond to the signal condition of 1 to 16 seconds of bitA = 0. Data determination is performed (S14).
When any one of S9, S11, S13, and S14 is performed, the process returns to FIG. 4 and the time information acquisition unit 16 of the control unit 10 acquires the data (code) determined by the code determination unit 13. Processing (S20) is performed.

Next, the time information acquisition unit 16 determines whether all the data has been acquired (S21). If “NO” in S21, whether a time-out has occurred after a set time (for example, 7 minutes) has elapsed since the start of reception. It is determined whether or not (S22). If it is determined “NO” in S22, the process returns to S5 and continues.
While the signal of 1 to 16 seconds is determined, the above processing is repeated to determine the bit data of each second.

[Signal determination of 17 to 52 seconds / 59 seconds]
Next, processing when a signal of 17 to 52 seconds / 59 seconds is determined will be described.
When the 17th to 52.59th signal is processed, the code determination unit 13 determines “YES” in S5.
Next, similarly to S8, the code determination unit 13 determines whether or not the total width of the H level signal calculated by the calculation unit 14 is 200 ms (S31).
When the total width of the H level signal is 200 ms, the code determination unit 13 determines “YES” in S31.

If the code determination unit 13 determines “YES” in S31, the code determination unit 13 performs an L level signal determination process to determine whether the L level signal has continued for a predetermined time T or more within a predetermined determination period ( S32).
The L level signal determination process (S32) is a process for distinguishing between the case where bitA = 0 and bitB = 1 and the case where bitA = 1 and bitB = 0, where the total width of the H level signal is 200 ms. Yes, in the case of bitA = 0 and bitB = 1, it is a determination process for detecting a 100 ms L level signal existing between 100 ms H level signals.
Therefore, the determination period is a period set according to the signal waveform pattern of the second code (bitA = 0, bitB = 1) in one second. Specifically, the start position may be any position that can detect the L level signal of 100 ms of the second code. For example, the position of 62.5 ms from the second synchronization timing (start time of 1 second) Position) to a position of 218.75 ms (the 28th position). The predetermined time T may be set to a time during which it can be detected that the signal is an L level signal of 100 ms, not a temporary L level due to noise, for example, 50 ms.
Assuming that the L level signal continues for more than a predetermined time T after the 62.5 ms position, even if bit A = 1 and bit B = 0, after the period of the 200 ms H level signal, the L level signal Since the period continues for 800 ms, a continuous state of the L level signal of 50 ms or more is detected in that portion, and “YES” is erroneously determined in S32. For this reason, in S32, the determination period is set and determined.

When the code determination unit 13 determines “YES” in S32, the determination target signal of 1 second is determined as bitA = 0 and bitB = 0 (S33). That is, as shown in FIG. 3, in the MSF, the signal of 17 to 52 · 59 seconds is set to bitB = 0, so that the signal pattern is bitA = 0, bitB = 0, bitA = 1, bitB = 0.
When bitA = 1 and bitB = 0, since the H level signal continues for 200 ms from the second synchronization timing, it should be determined as “NO” in S32. Therefore, if “YES” is determined in S32, there is a high possibility that the total width is determined to be 200 ms due to noise or the like affecting the signal of bit A = 0 and bit B = 0 where the total width of the H level signal is 100 ms. Therefore, the code determination unit 13 determines that bitA = 0 and bitB = 0.
On the other hand, if the code determination unit 13 determines “NO” in S32, it determines that bitA = 1 and bitB = 0 (S34).

If the code determination unit 13 determines “NO” in S31, the code determination unit 13 determines whether the total width of the H level signal calculated by the calculation unit 14 is 100 ms (S35).
If the code determination unit 13 determines “YES” in S35, the determination target signal of 1 second is determined as bitA = 0 and bitB = 0 (S36).

If it is determined “NO” in S35, the code determination unit 13 determines that the signal is affected by noise or the like because it does not correspond to the signal condition of 17 to 52 · 59 seconds of bitB = 0, and error data A determination is made (S37).
When any of the processing of S33, S34, S36, and S37 is performed, the time information acquisition unit 16 performs the processing of S20 and subsequent steps and determines “NO” in S22 as in the case of processing of 1 to 16 seconds. Then, the process returns to S5 again to continue the process.
While the signal of 17 to 52 · 59 seconds is determined, the above process is repeated to determine the bit data of each second.

[53-58 seconds signal judgment]
Next, processing when a signal of 53 to 58 seconds is determined will be described.
When processing the signal of 53 to 58 seconds, the code determination unit 13 determines “NO” in S5 and determines “YES” in S6 shown in FIG.
Next, the code determination unit 13 determines whether or not the total width of the H level signal calculated by the calculation unit 14 is 200 ms (S41).

When the total width of the H level signal is 200 ms, the code determination unit 13 determines “YES” in S41.
If the code determination unit 13 determines “YES” in S41, the determination target signal of 1 second is determined as bitA = 1 and bitB = 0 (S42). That is, as shown in FIG. 3, the reason why the total width of the H level signal becomes 200 ms in 53 to 58 seconds set to bitA = 1 is that it is limited to bitA = 1 and bitB = 0.

When determining “NO” in S41, the code determination unit 13 determines whether the total width of the H level signal calculated by the calculation unit 14 is 300 ms (S43). Also in S43, the code determination unit 13 determines whether or not the count number N is within the third determination range for determining 300 ms. For example, the third determination range may be set such that the number of samplings is 36 times or more and 41 times or less.
As shown in FIG. 2, in the MSF, the total width of the H level signal is 300 ms only when bitA = 1 and bitB = 1, and the code determination unit 13 determines “YES” in S43. In this case, the 1-second signal to be determined is determined as bitA = 1 and bitB = 1 (S44).

If the code determination unit 13 determines “NO” in S43, the code determination unit 13 does not meet the signal condition of 53 to 58 seconds of bitA = 1, and therefore determines that the signal is affected by noise or the like, and performs error data determination. Perform (S45).
When any of the processes of S42, S44, and S45 is performed, the time information acquisition unit 16 performs the processes after the data acquisition process (S20) as in the above-described processes.

That is, the time information acquisition unit 16 acquires the code determined from the code determination unit 13 (S20). And the time information acquisition part 16 determines whether all the data were acquired (S21), and if it is "NO" in S21, it will be determined whether it is time-out (S22).
In S21, the time information acquisition unit 16 acquires data capable of determining whether the acquired time information is the correct time, determines “YES” when the correct time information is acquired, and otherwise. It is determined as “NO”. Therefore, when the received time information is compared with the time measurement time, a code for at least 60 seconds can be acquired, and when the time information obtained from the code matches the time measurement time, the time information acquisition unit 16 performs S21. Is judged as “YES”.
Similarly, when determining the correct time information based on the consistency of the reception time information for 3 minutes, it is possible to acquire a code for at least 3 minutes, and when the time information obtained from the code matches each other, the time information acquisition The unit 16 determines “YES” in S21.

  If the control means 10 determines "YES" in S21, the reception process is terminated (S23). In this case, since the correct time information has been acquired, the time information acquisition unit 16 outputs the acquired time information to the time measuring unit 17, and the time measuring unit 17 corrects the internal time with the time information. For this reason, the time displayed on the time display unit 2 is also updated to the reception time.

On the other hand, if “NO” is determined in S21 and “YES” is determined in S22, the control unit 10 ends the reception process due to timeout (S23).
If the correct time information cannot be received even after the timeout period has elapsed since the start of reception, it is predicted that the signal strength is weak or the signal cannot be received. However, the processing is terminated because only power is consumed wastefully. Therefore, if the determination is “Yes” in S22 and the reception is terminated, the time information acquisition unit 16 does not output the reception time to the time measurement unit 17, and the time measurement unit 17 does not correct the time measurement.

According to this embodiment, the following operational effects can be achieved.
(1) The code determination unit 13 includes the total width of the H level signal calculated by the calculation unit 14, the signal position of the second (bit) of the code determination target (which is 1 to 59 seconds), and the determination period. With the information indicating whether the L level signal has continued for a predetermined time T, four types of signal waveform patterns in which two bit information are combined in one second can be easily and accurately discriminated.
In particular, since the first code and the second code that are common at an H level signal width of 200 ms are determined by the signal position and the duration T of the L level signal, they can be easily and accurately determined. In particular, at a signal position where there is no possibility of the second code, it is determined as the third code in consideration of the possibility of the influence of noise, so that highly accurate code determination can be performed.
Therefore, when correct code determination cannot be performed due to the influence of noise or the like, error determination can be performed correctly, and incorrect time information is not acquired, so that the correct time can be corrected.

(2) Since the calculation unit 14 only has to calculate the total width of the H level signal and the duration of the L level signal in the determination period, only the level determination at the time of sampling and the count of the H level and the L level are performed. This processing is sufficient, and complicated arithmetic processing is unnecessary. For this reason, processing is possible even with a power-saving CPU incorporated in the electronic timepiece 1.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the first embodiment, after determining whether or not the signal position is a position of 17 to 52 · 59 seconds in S5, a determination process (S21) is performed to determine whether or not the total width of the H level signal is 200 ms. However, in the second embodiment, conversely, after the determination process (S21) of whether or not the total width of the H level signal is 200 ms, the signal position is 17 to 52 · 59 seconds. A determination process (S5) of whether or not is executed.
Accordingly, in the second embodiment, the determination process will be described based on the flowcharts of FIGS. 6 and 7, the same processes as those in the flowcharts of FIGS. 4 and 5 of the first embodiment are denoted by the same reference numerals, and the description will be simplified.

Also in the second embodiment, the control means 10 performs the processing from S1 to S4, and then the code determination unit 13 determines whether or not the total width of the H level signal is 200 ms (S31).
If the code determination unit 13 determines “YES” in S31, the code determination unit 13 determines whether or not the data to be processed is a position of 17 to 52 · 59 seconds of the time data (S5). If “YES” in S5, Then, it is determined whether or not the L level signal has continued for a predetermined time T or more in the determination period (S32).
As in the first embodiment, the code determination unit 13 determines that bitA = 0 and bitB = 0 if “YES” in S32 (S33), and if “NO”, bitA = 1 and bitB = 0. Determine (S34).

  If “NO” in S5, the code determination unit 13 determines whether the data to be processed is 53 to 58 seconds of time data (S6). If “YES” in S6, bitA = 1, bitB It is determined that = 0 (S42). If “NO”, that is, if the data to be processed is 1 to 16 seconds of time data, it is determined that bitA = 0 and bitB = 1 (S9).

In the case of “NO” in S31, as shown in FIG. 7, the code determination unit 13 determines whether or not the total width of the H level signal is 300 ms (S43), and in the case of “YES” in S43, It is determined that bitA = 1 and bitB = 1 (S44).
If “NO” in S43, the code determination unit 13 determines whether or not the total width of the H level signal is 100 ms (S10). If “YES” in S10, bitA = 0 and bitB = 0. (S11).
If “NO” in S10, the code determination unit 13 determines whether the total width of the H level signal is 500 ms (S12). If “YES” in S12, the code determination unit 13 determines “marker” ( If “NO” in S13) and S12, error data determination is performed (S14).

When these code determination processes are finished, as shown in FIG. 6, the time information acquisition unit 16 performs the same processes of S20 to S23 as in the first embodiment.
Also in such 2nd Embodiment, there can exist the same effect as 1st Embodiment.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In the first and second embodiments, the second position of the data to be processed is included in the determination condition, but is not included in the third embodiment.
Therefore, in the third embodiment, the determination process will be described based on the flowchart of FIG. In FIG. 8, the same processes as those in the first and second embodiments are denoted by the same reference numerals, and the description will be simplified.

Also in the third embodiment, the control means 10 performs the processing from S1 to S4, and then the code determination unit 13 determines whether or not the total width of the H level signal is 200 ms (S31).
If it determines with "YES" by S31, the code | cord | chord determination part 13 will determine whether the L level signal continued more than the predetermined time T in the determination period (S32).
If “YES” in S32, the code determination unit 13 determines that bitA = 0 and bitB = 1 (S9), and if “NO”, determines that bitA = 1 and bitB = 0 (S34).

If “NO” in S31, the code determination unit 13 determines whether or not the total width of the H level signal is 300 ms (S43). If “YES” in S43, bitA = 1 and bitB = 1. (S44).
If “NO” in S43, the code determination unit 13 determines whether or not the total width of the H level signal is 100 ms (S10). If “YES” in S10, bitA = 0 and bitB = 0. (S11).
If “NO” in S10, the code determination unit 13 determines whether the total width of the H level signal is 500 ms (S12). If “YES” in S12, the code determination unit 13 determines “marker” ( If “NO” in S13) and S12, error data determination is performed (S14).

  When these code determination processes are completed, the time information acquisition unit 16 performs the same processes of S20 to S23 as in the first embodiment as shown in FIG.

Also in such 3rd Embodiment, there can exist the same effect as 1st, 2nd Embodiment.
In the third embodiment, since the signal position is not a condition, the code determination process can be performed more easily than in the first and second embodiments.

Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within a scope in which the object of the present invention can be achieved are included in the present invention.
For example, the standard radio wave to be received in the present invention is not limited to the British standard radio wave “MSF”. In short, a standard radio wave including two bit data of bit A and bit B per second and including two codes having the same total value of the first level signal width as in the first code and the second code of the embodiment. If it is.

Further, the condition of the signal position in the code determination process, the determination period for determining whether the second level signal is continued, and the value of the predetermined time T are not limited to the specific example of the embodiment, but are 1 second. It may be set according to the characteristics of the signal waveform pattern.
The first level signal width detection method is not limited to the method of counting the number of times of sampling, and the time may be measured using a timer or the like.

  Furthermore, each configuration of the control means 10 shown in FIG. 1 may be configured by hardware such as various logic elements, or a CPU (central processing unit), a memory (storage device), etc. are provided in the electronic timepiece 1. Each of the above-described configurations may be realized by executing a predetermined program on the CPU.

  DESCRIPTION OF SYMBOLS 1 ... Electronic timepiece, 2 ... Time display part, 4 ... Antenna, 5 ... Reception part, 6 ... Oscillation circuit, 7 ... Frequency division circuit, 10 ... Control means, 11 ... Memory | storage part, 12 ... Detection part, 13 ... Code determination Part, 14 ... calculation part, 16 ... time information acquisition part, 17 ... timekeeping part.

Claims (6)

A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A receiving unit to
A calculation unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the reception unit;
A code determination unit for determining a code of the signal,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
The code determination unit
It is determined whether the total value calculated by the calculation unit is the same as the total value of the signal width of the first level signal in the first code or the second code,
If determined to be the same, it is determined whether or not the second level signal continues for a predetermined time in a determination period set according to the signal waveform pattern of the second code in one second,
When it is determined that the predetermined time has not been continued, it is determined that the first code has been received. A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A receiving unit to
A calculation unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the reception unit;
A code determination unit for determining a code of the signal,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
The code determination unit
A signal position indicating what second signal is detected in a frame composed of a 60-second signal for a signal to be determined for one second;
It is determined whether the total value calculated by the calculation unit is the same as the total value of the signal width of the first level signal in the first code or the second code,
The electronic timepiece characterized in that, when it is determined that they are the same, the first code and the second code are determined based on the signal position. A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A receiving unit to
A calculation unit that calculates a total value of the signal widths of the first level signal for one second of the signal received by the reception unit;
A code determination unit for determining a code of the signal,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second, and a total value of the signal width of the first level signal for one second is the first code and the second code. A third code that is 1/2 of the second code,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
The third code is a code for transmitting one first level signal per second,
The code determination unit
A signal position indicating what second signal is detected in a frame composed of a 60-second signal for a signal to be determined for one second;
It is determined whether the total value calculated by the calculation unit is the same as the total value of the signal width of the first level signal in the first code or the second code,
If it is determined that they are the same, and there is no possibility that the signal position includes the second code, in the determination period set according to the signal waveform pattern of the second code in one second, the second code Determine whether the two-level signal has continued for a predetermined time,
If it is determined that the predetermined time has continued, it is determined that the third code has been received,
When it is determined that the predetermined time has not been continued, it is determined that the first code has been received. A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A method for controlling an electronic timepiece comprising a receiving unit,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
Calculating a total value of signal widths of the first level signal for 1 second of the signal received by the receiving unit;
Determining whether the calculated total value is the same as the total value of the signal width of the first level signal in the first code or the second code;
A step of determining whether or not the second level signal has continued for a predetermined time in a determination period set according to the signal waveform pattern of the second code in one second when determined to be the same;
And a step of determining that the first code has been received when it is determined that the predetermined time has not been continued. A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A method for controlling an electronic timepiece comprising a receiving unit,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
Calculating a total value of signal widths of the first level signal for 1 second of the signal received by the receiving unit;
Detecting a signal position indicating a second signal in a frame composed of a 60-second signal, and a 1-second signal to be determined;
Determining whether the calculated total value is the same as the total value of the signal width of the first level signal in the first code or the second code;
And a step of determining the first code and the second code based on the signal position when they are determined to be the same. A method for controlling an electronic timepiece, comprising: A standard radio wave that includes a first level signal and a second level signal in one second, and that transmits a signal including two types of bit data in the one second by a combination of the first level signal and the second level signal is received. A method for controlling an electronic timepiece having a receiving unit,
The signal includes a first code and a second code having the same total signal width of the first level signal for one second, and a total value of the signal width of the first level signal for one second is the first code and the second code. A third code that is 1/2 of the second code,
The first code is a code for transmitting one first level signal per second,
The second code is a code for transmitting two first level signals per second,
The third code is a code for transmitting one first level signal per second,
Calculating a total value of signal widths of the first level signal for 1 second of the signal received by the receiving unit;
Detecting a signal position indicating a second signal in a frame composed of a 60-second signal, and a 1-second signal to be determined;
Determining whether the calculated total value is the same as the total value of the signal width of the first level signal in the first code or the second code;
If it is determined that they are the same, and there is no possibility that the signal position includes the second code, in the determination period set according to the signal waveform pattern of the second code in one second, the second code Determining whether the two-level signal has continued for a predetermined time;
If it is determined that the predetermined time has continued, the step of determining that the third code has been received;
And a step of determining that the first code has been received when it is determined that the predetermined time has not been continued.

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