JPH11211858A - Analyzing method for time code for radio wave-corrected timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow time read-in via the analysis of a time code even with the weak radio wave and to reduce the limitation on the installation position of a timepiece body. SOLUTION: When time data are read in by the analytical process of the standard radio wave, a time code is read after 1-sec synchronization and 0-sec position detection, and level detection is made by sampling pulses. The level detection of the time data signal is made for the time of a long pulse width from the output start point of each code expressing each bit data by the length of the pulse width. When an active level is detected only during the time of a short pulse width, '1' is set. When the active level is detected after the time of the short pulse width elapses, '0' is set. If the time data are not within the range of the value normally used for time display, the analytical process of the standard ratio wave is again started from the 1-sec synchronization and 0-sec position detection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio-controlled timepiece that corrects display time using a long standard radio wave, and more particularly to a method of analyzing a time code contained in a standard radio wave.

[0002]

2. Description of the Related Art Today, a radio-controlled timepiece that uses a long-wave standard radio wave (JG2AS) that conveys the Japan Standard Time with high accuracy and displays the time with an extremely small difference from the Japanese Standard Time is used. This radio-controlled timepiece has a bar antenna for receiving a standard radio wave having a carrier frequency of 40 kHz, and has a reception demodulator for demodulating a data signal such as a time code from the received standard radio wave.

In this radio-controlled timepiece, a time counter for counting a one-hertz second signal formed by a crystal oscillator and a frequency divider, and a microcomputer for decoding a time code from a data signal demodulated by reception demodulation means are provided. And receives the standard radio wave and analyzes the time code for each required time. Furthermore, this radio-controlled clock reads the time code of Japan Standard Time into a time counter when the time code is analyzed to determine the correct time data of Japan Standard Time, and adjusts the value of the time counter exactly to Japan Standard Time. In a digital display type clock body, the count value of the time counter is displayed on a display device such as a liquid crystal display device while the value of the time counter is increased every second.

An analog radio-controlled timepiece that displays the time by driving the hands has a bar antenna and a receiving / demodulating means, and also has a built-in microcomputer for decoding the time code and controlling the hands driving motor. It is a body. For example, as shown in FIG. 12, the analog radio-controlled timepiece includes a bar antenna 13 for receiving a standard radio wave, a reception demodulation unit 15 for demodulating a data signal such as a time code signal from the standard radio wave, It has a microcomputer 11 for analyzing a code and controlling a pointer driving motor.

[0005] The microcomputer 11 has a second hand motor 25 and an hour / minute hand motor 27 incorporated in the movement 21.
Is connected, and an output pulse from the microcomputer 11 is applied to the second hand motor 25 and the hour / minute hand motor 27 via the motor drive buffer 23. The movement 21 also has an hour / minute hand sensor 33 for detecting the hand position where the hour hand and the minute hand indicate 0:00, and a second hand sensor 31 for detecting the hand position where the second hand indicates 0 second. The sensor 33 for the second hand and the sensor 31 for the second hand are also connected to the microcomputer 11.

A reset switch 19 and a crystal oscillation circuit 17 are also connected to the microcomputer 11.
The microcomputer 11 has a function as a level detecting means for detecting the output level of the receiving and demodulating means 15 and an analyzing means for decoding a signal code contained in the standard radio wave. Of these, the time counter of the clock body has a function as time setting means for setting an accurate current time based on the time code signal, and time data based on the time code signal based on the standard time signal is set. A time counter that advances the count value every second. Further, comparing means for comparing the count value of the time counter with the current time value indicated by the hands, a second hand motor 25 for every second.
Of the second hand motor 25 and the hour / minute hand motor 27 as a main control means for driving the hour / minute hand motor 27 one step every 10 seconds or the like.
The microcomputer 11 also has a display counter that stores the current time indicated by the hands by counting the number of pulses output to the pointer.

The main control means not only controls the second hand to advance by one step every one second and the hour and minute hands by one step every ten seconds, but also controls the hour and minute hands every ten seconds.
It also controls fast-forwarding to perform steps of up to 20 steps. This fast-forward control detects the coincidence between the count value of the time counter and the count value of the display counter, and performs a fast-forward correction of fast-forwarding the hands until the count values of both counters match.
This is executed in the case of the zero-return control in which fast-forwarding is performed until 31 detects the 0 position of the second hand and until the hour / minute hand sensor 33 detects the 0 position of the hour hand and the minute hand.

In some timepieces, a minute hand motor and an hour hand motor are provided in addition to the second hand motor 25, and the three hands drive and control the second hand, minute hand and hour hand individually. In this radio-controlled timepiece, a standard radio wave is received by the bar antenna 13 or the like, a time code signal or the like is demodulated from the standard radio wave by the reception / demodulation means 15, and the demodulated signal is input to the microcomputer 11 to analyze the time code. Then, each data of hour, minute, and second is set in a time counter. The microcomputer 11 operates the microcomputer 11 by an output of an oscillation circuit 17 such as a crystal oscillator that outputs an accurate reference frequency signal,
The microcomputer 11 performs various controls and operations as analysis means and main control means.

The microcomputer 11 performs a control operation when a battery is inserted or a reset switch.
When the button 19 is operated, as shown in FIG. 13, first, initial setting (S111) is performed, and zero-return control (S113) is performed. This return-to-zero control (S113) is performed by the second hand motor.
A motor drive pulse having a frequency of 10 Hz or 20 Hz is output to the motor 25 or the hour / minute hand 27, and a drive pulse voltage is applied to each of the motors 25, 27 via the motor drive buffer 23, and each motor 25 is output. , 27 fast forward.

Further, in the zero-return control (S113), the second hand sensor 31 and the hour / minute hand sensor 33 each time one motor drive pulse is output to the second hand motor 25 or the hour / minute hand motor 27.
The second hand sensor 31 detects whether the second hand has reached the zero position, and the hour / minute hand sensor 33 detects whether the hour hand and the minute hand have reached the zero position.

When the second hand sensor 31 detects that the second hand has reached the 0 second position, the output of the motor drive pulse to the second hand motor 25 is stopped.
When detecting that the hour hand and the minute hand have reached the 0:00 position by 33, the output of the motor drive pulse to the hour / minute hand motor 27 is stopped. In this way, after the second hand and the hour / minute hand are rapidly advanced to the zero position by the zero-return control (S113), the microcomputer 11 receives the standard radio wave by the bar antenna 13 and demodulates by the reception demodulation means 15 the time code and the like. The analysis and the reading of the time of Japan Standard Time (S115) are performed.

As shown in FIG. 14, the JG2AS standard radio wave defined by the Ministry of Posts and Telecommunications forms a reference marker signal of 0 to 0.2 seconds, and 10 seconds such as 9 seconds, 19 seconds, and 29 seconds. A position marker signal of 0.2 seconds is formed every minute, and a minute data signal is generated between 1 second and 8 seconds.
An hour data signal is formed during 8 seconds, a day data signal is formed between 22 seconds and 33 seconds, and various other data signals are inserted at each second. A long pulse signal is set to a binary “0”, and a short pulse signal for 0.5 seconds is set to a binary “1”, and a signal of a predetermined binary code is included in one minute, so that the rising of the reference marker signal is accurately performed. It is set to 0 seconds.

The minute data in the standard radio wave is 1
If there is a “1” with a 0.5 second width in the second, the value of 40 minutes, if there is a “1” with a 0.5 second width in the second, a value of 20 minutes and 0.5 in the third second If there is a "1" in the second width, a value of 10 minutes is used. If there is a "1" in the 0.5 second width at the fifth time, a value of 8 minutes is used.
If there is "1" with a width of 5 seconds, the value of 4 minutes is used. If "1" with a width of 0.5 seconds is 7 seconds, a value of 2 minutes is set. ”Indicates a value of 1 minute, and if there is a“ 0 ”with a 0.8 second width in each second, each numerical value is set to 0, and from 0 minutes by a combination of a code“ 0 ”or a code“ 1 ”of each digit. The values at standard time up to 59 minutes are shown. The hour data is set to 0.
If there is a “1” having a width of 5 seconds, the value at 20:00 is set to 0 at the 13th second.
If there is a "1" with a width of 5 seconds, the value at 10:00 is set to 0 at the 15th second.
If there is a "1" with a width of 5 seconds, the value at 8:00 is set to 0.5 at the 16th second.
If there is a second width of “1”, the value of 4:00 is given if there is a 0.5 second width “1” at the 17th second, and the value of 2:00 is given if the second width is 18 seconds. Indicates the value of 1 o'clock, and if there is a "0" with a 0.8 second width at each second, each numerical value is set to 0, and the code of each digit is "0"
Alternatively, the value of the standard time from 0:00 to 23:00 is indicated by a combination of the code “1”, and other data such as the day of the year after the twentieth second is converted to the code “0” and 0.8.
It is included in combination with the code “1” having a width of 5 seconds.

Then, reading of Japan Standard Time (S115)
First, as shown in FIG. 15, first one second is synchronized with the rise of the marker signal or the data signal (S20).
1) It is determined whether synchronization has been achieved (S202).
When synchronization is established, detection of a 0-second position for detecting a marker signal having a width of 0.2 seconds is performed (S203), and determination of whether or not the position is a 0-second position (S204) is performed by continuously detecting two marker signals by two marker signals. This is performed by detecting a reference marker signal following the signal.

Further, when the 0-second position is detected, the pulse width of the code signal is measured while determining whether the level of the data signal is at the H level (S205) (S206).
Each signal of the minute data signal and the hour data signal is converted into a binary code signal having a code “0” or a code “1” according to the level duration, and the binary code signal is converted into time data (S207). It is determined whether or not the last data has been read (S208), and finally, whether or not the time data is an appropriate numerical value (S208).
209).

When a binary code signal of "0" or "1" is formed based on the pulse widths of the minute data signal and the hour data signal, sampling is performed several tens of times per second to detect the pulse width. Of the tens of detections, “1” and 0.8 having a width of 0.5 seconds are determined based on the number of detections of the active level.
A method of identifying a second width of “0”, a sampling of several tens of times per second, and a change point from H to L while performing level determination when the same level of H or L continues several times, and A method of detecting the point of change from L to H to detect the width of the active level and identifying code “0” or code “1”. A method such as determining a 0.5-second width code "1" and a 0.8-second width code "0" by determining two points such as the second position and performing detection twice a second is adopted. Have been.

If the reception condition of the standard radio wave is good, the output signal of the receiving / demodulating means 15 has a width of 0.2 seconds, 0.5 seconds, or 0.8 seconds as shown in FIG. A pulse signal having a second width active level (L level in the figure) is output at one second intervals. However, the electric wave may be weak depending on the installation location such as indoors.
For this reason, the demodulation of the code signal by the reception demodulation means 15 cannot be performed accurately, and a signal having a level change that follows the code signal while emphasizing a change point of the code signal by a differentiating circuit incorporated in the reception demodulation means 15 or the like. And may be affected by noise such as other radio waves,
When an inaccurate level signal is formed as shown in FIG. 16B, and the L level and the H level are distinguished by the threshold value VH, the output of the receiving / demodulating means 15 becomes a code signal as shown in FIG. Although it corresponds, it becomes an inaccurate demodulated wave in which the H level and the L level are mixed.

Therefore, when the radio wave becomes weak, the pulse width of the code signal, that is, “0” of the minute data signal and the hour data signal is reduced.
Alternatively, the minute data signal and the hour data signal may not be deciphered by accurately determining “1”. Therefore, the time data obtained by decoding the time data signal is an inappropriate value, for example, a value of 60 or more as minute data, and a value of 24 or more as hour data. When the value becomes a value not used for display, the standard signal is analyzed again and the time is read again. And the time reading (S115) is continued for a required time.

When the time data of Japan Standard Time is read as an appropriate numerical value, this time data is preset in a time counter (S211), and a second signal of 1 Hz is corrected so as to correct an error of 1 second or less. The dividing circuit and the second counter to be formed are reset to 0 seconds (S21).
5) The standard radio wave reception and time reading (S115) are terminated.

After receiving the standard radio wave and reading the time (S115) for a required time or resetting the second counter in the standard radio wave receiving and reading the time (S115), as shown in FIG. It is determined whether or not the time counter has been preset, that is, whether or not the time data of an appropriate numerical value has been read (S117). When the time data has been read, the time data of Japan Standard Time is preset and The fast forward correction (S119) is performed in which the time corresponding to the value of the time counter that counts up is displayed by the hands.

In this fast-forward correction, it is determined whether or not the count values of the time counter and the display counter match, and when they do not match, the value of the display counter is increased by 1 while outputting a motor drive pulse. It is determined whether or not the respective count values of both counters match, and if they do not match, the motor drive pulse is output to continue the correction of the fast-forward correction, and if they match, the normal hand operation (S120) is performed. What you do.

In this fast-forward correction, a motor drive pulse is output once to the hour / minute hand motor 27 every time the motor drive pulse is output to the second hand motor 25 a predetermined number of times, such as 10 or 20 times. When the time counter and the display counter are separated into an hour / minute counter and a second counter, and the hour / minute hand is fast-forwarded by the hour / minute hand motor 27, the hour / minute counter of the time counter and the hour / minute counter of the display counter are used. In some cases, the second hand motor 25 is fast-forward-driven until the count value of the second counter of the time counter and the second counter of the display counter match while the count value of the second counter and the second counter of the time counter match.

After the time in Japan Standard Time is displayed by the hands, the second hand is driven every one second, and the normal hand (S120) for driving the minute hand and the hour hand every ten seconds or several tens of seconds is performed. When it is determined that the time is the automatic correction time (S121), when the automatic correction time comes, the reception of the standard radio wave and the code analysis are performed for the required time of several minutes to about 10 minutes to convert the time data of Japan Standard Time. The time reading (S123) to be preset in the time counter is performed.

Further, it is determined whether or not the time data has been read by presetting the time counter (S1).
25) is performed, and when the time such as presetting to the time counter is read, it is determined whether or not the time data of Japan Standard Time matches the display data of the display time by the hands (S127). If so, the display is corrected (S129).

When there is no time difference, the normal hand operation (S
Returning to step 120), it is determined whether or not the next automatic correction time has been reached (S121). If there is a time difference, the display is corrected (S129). This display correction (S1
29) Compares the count value of the time counter with the count value of the display counter, corrects the fast-forward when the count value of the time counter is large, and corrects the steps such as the second hand when the count value of the display counter is large. Stop the advance and repeat the comparison of the count value of the time counter and the count value of the display counter, and stop the advance of the second hand or the like until the count value of the time counter matches the count value of the display counter, Alternatively, there is a device in which the count values of the display counters are sequentially reduced while the output terminals are switched to reverse the second hand motor 25 and the like, so that the count values of both counters match.

In this way, the radio-controlled timepiece sets the hands at 0: 0: 0 when replacing the battery or resetting it.
While driving the second hand every second, receive the standard time signal, analyze the time code signal, etc., read the time data to preset the time data value of Japan Standard Time in the time counter, and display the Japan Standard Time The hands, such as the hour and minute hands, are controlled by hand movement. After that, once or several times a day, the standard time is received and the time is read by analyzing the code signal to correct the error between the displayed time and the Japan Standard Time, so that it is always accurate The display of the time is performed.

In this radio-controlled timepiece, as shown in FIG. 12, a reading and displaying means 37 such as a light emitting diode 38 is connected to the microcomputer 11, and the reading and displaying means is connected to the microcomputer 11.
37 is provided on a dial of a clock body or the like, and when the processing of receiving the standard radio wave and reading the time (S115, S123) is performed, the reading display means 37 is also made to blink.

[0028]

As described above, a radio-controlled timepiece that displays a time adjusted to Japan Standard Time by analyzing a standard time signal can always display an accurate time. is there. However, in a radio-controlled timepiece in which radio waves are weakly located, such as indoors, it is difficult to accurately read the time code, so that accurate time display may not be performed.

For this reason, accurate time display cannot be performed unless the radio-controlled timepiece is installed at a position where the reception condition of the standard radio wave is good, and the installation place of the clock body is sometimes limited. The present invention eliminates such a drawback, enables reading of time by analyzing a time code even with a weak radio wave, and reduces restrictions on the installation location of the clock body.

[0030]

According to the present invention, when performing standard radio wave analysis processing to read time data, 1 second synchronization and 0 second position detection are performed, and then in time code reading processing, sampling pulses are used. The level of the code signal is detected, and the level of the minute data signal and the hour data signal are detected within the time of the long pulse from the output start point of each code that indicates minute data and hour data according to the length of the pulse width. When an active level is detected only within the width, it is determined to be either code "1" or code "0",
If the active level is detected after the elapse of the short pulse time width, it is the other of code "0" or code "1". If the values of minute data and hour data are not within the range of appropriate values used for normal time display, Then, the standard radio wave analysis processing is performed again from the one-second synchronization and the zero-second position detection.

As described above, the level detection of the minute data signal and the hour data signal required for time correction is performed, and only 0.8 seconds, which is the time width of a long pulse, from the output start point of each code in the code signal. If level detection is performed and an active level is detected only within the first 0.5 seconds, which is the time width of a short pulse, code "1" or code "0" is set, so time data can be obtained from weak radio waves. The necessary code "1" or code "0" can be set.

In one second, level detection is performed for only 0.8 seconds, which is the time width of a long pulse, from the output start point of the code. When the active level is detected within 0.8 seconds from the output start point of the data, the code "0" or the code "1" is set, so that the code "0" or the code "1" required as time data even from a weak radio wave is set. Can be set.

Since the level detection is performed only for the code position of the required time data and the time width of each code, the time data can be analyzed without being affected by noise at unnecessary portions of the time data. Further, according to the present invention, it is determined whether or not the values of the minute data and the hour data are within a proper value range. If the value of the time data is not within the proper value range, the processing is performed again from 1 second synchronization. Time data can be accurately read from radio waves.

In the present invention, the signal level is detected several tens of times within one second based on the interrupt signal, and when the active level is detected once or several times during the number of samplings, , Time code. As described above, since the level detection is performed by sampling based on the interrupt signal, the level detection is easily performed several tens of times per second, and the time code is determined by detecting the active level once or several times. The code “0” or the code “1” can be easily formed from a simple radio wave.

Further, in the pulse width measurement and sampling of the time code signal, there is no need to perform arithmetic processing such as counting the number of detections and integrating the counts to obtain the time width of the active level, which is simple and easy. It is possible to perform the process of setting the code to “0” or “1”. In the present invention, when detecting the level, when no active level can be detected within 0.8 seconds from the start point of each code output of the long pulse and the short pulse, from the processing of 1 second synchronization and 0 second position detection, The code analysis processing of the standard radio wave is performed again.

As described above, when no active level that should exist is not detected at all during the time code signal analysis processing, the processing is performed from the beginning of the analysis processing.
The possibility of reading incorrect time data from a weak radio wave can be reduced. In the present invention, when the required time is set, time data of an appropriate value is obtained twice consecutively within the required time, and when the values of the time data read continuously match by one minute. Alternatively, the time reading is terminated when the required time has elapsed.

As described above, since the time coincidence is determined based on the analysis result of the time data that has been successively performed twice, the time reading process can be completed when the time data is accurately read. Further, when the required time has elapsed, the reading of the time data can be prevented from being uselessly continued.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The time reading in the radio-controlled timepiece according to the present invention is performed by setting a required time of about 10 minutes when analyzing the output signal of the receiving / demodulating means 15 and performing second synchronization by processing of one second synchronization. After that, the 0 second position detection of the code signal in the standard radio wave is performed, the pulse width of the time code signal is detected, the time code is formed by code conversion, and the time data when the time data is obtained twice and coincides is obtained. To adopt.

That is, similarly to the conventional technique shown in FIG. 13, the processing of receiving the standard radio wave and reading the time (S115) performed after the initialization (S111) such as resetting,
As shown in FIG. 1 and FIG. 2, as a process of receiving the standard radio wave and reading the time (S123) performed when the automatic correction time is reached, first, a timer interrupt is permitted (S311), and several tens of Time reading processes such as 1-second synchronization (S340), 0-second position detection (S350), and code conversion (S370) are performed based on the interruption process.

Then, as shown in FIG. 1, after permitting the timer interrupt (S311), first, synchronization for one second is obtained (S311).
340), after determining whether or not the time is within the required time (S313), detection of the 0 second position is performed (S350), and determination of whether or not within the required time (S314) is performed again to detect the pulse width (S314). S360). The detection of the pulse width (S360) detects the pulse width at the time code signal position and determines whether the pulse width is 0.5 second as a short pulse or 0.8 pulse as described later.
This is to identify whether the pulse is a long pulse having a second width.

Then, pulse width detection (S) is performed to determine whether a short pulse having a width of 0.5 seconds or a long pulse having a width of 0.8 seconds is performed every second.
(360), while determining whether or not the time is within the required time (S31).
5) to perform code conversion (S370) as indicated by reference numeral C in FIG. This code conversion (S3
In 70), the time data of Japan Standard Time is obtained based on the minute data signal and the hour data signal, it is determined whether or not the numerical value is an appropriate value, and if the value is an appropriate value, this numerical value is stored. .

Then, it is determined whether or not the time data of Japan Standard Time has already been stored and time data of an appropriate value has been newly obtained, that is, whether or not the time data has been detected for the second time. (S321), and if it is the second time,
Data comparison (S380) is performed to compare the stored value obtained by adding one minute to the value of the time data obtained last time and the value of the newly obtained time data, and determine whether or not the time data match. (S325).

Thereafter, when the time data coincides with each other, the reading completion flag is set (S327) and the timer interrupt is prohibited (S329), and the processing of receiving the standard radio wave and reading the time (S115, S123) is completed. is there. Also, the code conversion of the minute data signal and the hour data signal is performed by one.
This is performed every second, and when the time data is not aligned, the pulse width detection (S360) is performed while determining whether the detection of the time data is the second time (S321) and determining whether there is a data error (S323). And the code conversion (S370) are repeated, and when the numerical value of the time data obtained by the code conversion (S370) is not an appropriate value used for displaying the time of the place, or when the numerical value obtained the second time is one minute from the previous numerical value. If it does not match the added numerical value, it is determined whether or not a data error has occurred (S32).
Based on 3), the process is performed again from the process of 1-second synchronization (S340).

The processing of the one-second synchronization (S340) is shown in FIG.
As shown in (1), first, initial setting (S401) is performed. This initial setting (S401) clears a step counter, a step number storage memory, a flag memory, and other memories necessary for time reading processing including one-second synchronization processing.

The following processing is performed at a rate of several tens of times per second based on the interrupt signal. In the present embodiment, an interrupt request is issued about every 31 milliseconds based on a 32 Hz interrupt signal. Then, it is determined whether or not an interrupt request has been made by an interrupt signal of 32 Hz (S402), and each process is performed. After determining whether or not this interrupt request has been made (S402), it is determined whether or not it is within the required time (S403) to determine whether or not the required time such as 10 minutes has elapsed. When the required time has elapsed, a time-over flag is set (S404).
Then, as shown by a symbol E in FIG.
This ends the process of 0).

If it is within the set required time such as 10 minutes, it is determined whether or not it is the 32nd step (S405).
That is, it is determined whether or not the time is within one second.
If it is a step, the step counter is cleared (S40
7) What you do. Then, at times other than the 32nd step, and after the step counter is cleared (S407), the level of the output signal of the reception / demodulation means 15 is detected at each step as described below, and the level of the output signal is changed to the active level L level. This is to detect a change point of a signal.

The processing other than the step 32 and after the step counter is cleared (S407) is described in FIG.
Also, as indicated by reference numeral F in FIG. 4, it is determined whether or not the previous detection level was at the H level (S411).
When it is determined that the flag is not set and the H level is not detected in the previous level detection, the level detection (S
412) to determine whether or not the signal is at the L level (S413). If the signal is at the L level, 1 is simply added to the step counter (S421), and an interrupt request is issued as shown by the symbol G in FIGS. The process returns to the determination (S402) of whether or not there is an error. If the result of the level detection (S412) and the determination of whether or not the level is L (S413) indicates that the level is H level, the H flag is set (S414). Is performed, 1 is added to the step counter (S421), and the process returns to the determination of whether or not an interrupt request has been made (S402).

When the H flag is detected in the previous judgment (S411) as to whether or not the detection level is the H level, the level detection (S415) and the judgment as to whether or not the detection level is the L level (S416) are performed. Level detection (S415)
If it is also at the H level, 1 is added to the step counter (S421), and it is determined whether or not an interrupt request has been made (S421).
402).

However, when the previous detection result is the H level and the L level is detected in the new level detection (S415), the H flag is reset (S416) based on the determination whether the level is the L level (S416). S417) and
It is determined whether or not a step number that matches the step number is stored (S418). If the step number is not stored, the step number is stored (S419) and 1 is added to the step counter (S418). S421), it is determined whether or not an interrupt request has been made (S421).
402).

That is, based on the interrupt signal, three times a second
Dozens of level detections, such as twice, are performed. If the previous level detection detects the H level but the new level detection detects the L level which is the active level, recording is performed on the counter of the step number. The falling position in the output signal of the receiving and demodulating means 15 is detected and stored.

When a fall is detected in the step, if a step number corresponding to the step number is already stored in the memory, it is determined whether or not the same step number is stored (S418). , The detection completion flag is set (S425), and this step number is stored as the edge position, that is, the start point of the code signal (S427).

As described above, in the one-second synchronization (S340) process, for example, several tens of times of level detection (S412, S32, etc.) by an interrupt signal of 32 Hz or the like, for example, 32 times a second.
S415) is performed by a sampling pulse, and the step number which is the number of the interrupt processing that detects the change point to the active level serving as the code output start point is recorded, and changes to the active level again with the same step number, that is, one second interval. When the detected edge position is detected, the processing of the one-second synchronization (S340) ends.

Therefore, as shown in FIG. 16A, when the reception state is good and the code signal is correctly output from the reception demodulation means 15, the edge detection is completed in the second second. This ends the one-second synchronization (S340) process. Also, as shown in FIG. 16B, even when the reception state deteriorates and the standard radio wave becomes weak, and the output signal from the receiving / demodulating means 15 is disturbed as shown in FIG. If the fall of the output signal always occurs at the point of change to the active level, which is a point, even if noise is included in the middle of the code signal, the process of 1 second synchronization (S340) ends at the second second. Is what you can do.

Further, even if the condition of the radio wave is further deteriorated and the signal of each code cannot be correctly demodulated,
Compared to noise having a low probability of occurring at one second intervals, it becomes possible to detect the output start point of each code having the highest probability of occurring every second in about several seconds. Note that the 1-second synchronization (S340) process detects a change point to the active level at 1-second intervals, clears the step counter every 1 second, and immediately detects a fall with the same step number. Although the processing of the one-second synchronization (S340) has been completed, when the same step number is detected a plurality of times, such as three or four times, the position of this step number is set as an edge position and the one-second synchronization (S340) is ended. There is also.

Then, in the detection of the 0-second position (S350) performed after the 1-second synchronization (S340) processing, as shown in FIG. 5, first, initialization (S501) is performed to clear the step counter and the pulse counter. It is something to keep. Then, it is determined whether or not a required time such as 10 minutes has elapsed (S503). When the required time has elapsed, a time-over flag is set (S505) and the detection of the 0-second position (S350) ends. If it is within the required time, it is determined whether or not it is the 32nd step (S511), that is, whether or not 1 second has elapsed from the edge position of the code signal which is the start position of each code obtained by 1 second synchronization. It is to determine whether or not.

Further, when one second has not elapsed from the edge position at which the output of each code is started, it is determined whether or not the number of steps is less than 13, as indicated by reference numeral I in FIG. 6 (S521). That is, it is determined whether it is within about 0.4 seconds from the edge position, and if it is less than the thirteenth step, the level detection of the signal output by the reception demodulation means 15 (S
523) is performed based on the sampling pulse, and a level determination as to whether or not the signal is at the H level is performed (S525). If the signal is at the L level, 1 is added to the pulse width counter (S527).

When the number of steps is less than 13,
The level of the code signal output from the receiving / demodulating means 15 is detected (S523), and it is determined whether or not the detected code signal is at the H level (S525). One was added (S527).
Thereafter, when the output signal is at the H level, it is determined whether or not the number of steps has reached 12 (S531), and then whether or not the number of steps has reached 12 (S531). If the number of steps has not reached 12 as a result of the determination (S531), 1 is added to the step counter (S541), and it is determined whether an interrupt request has been made (S541).
545) is repeated, and if there is an interrupt request, the process returns to the determination (S503) as to whether the required time has elapsed.

If it is determined that the number of steps has reached 12 based on the determination of whether or not the number of steps has reached 12 (S531), the count value of the pulse width counter becomes 4
A determination is made as to whether or not this is the case (S533) and whether or not the count value is less than 10 (S535). If the count is 4 or more and 9 or less, a marker flag is set (S53).
If 7) is 3 or less or 10 or more, the non-marker flag is set (S539).

After the thirteenth step, it is determined whether or not the number of steps is less than 13 (S521). Then, 1 is simply added to the step counter (S541), and it is determined whether or not an interrupt request has been made (S541). (S545) is performed, and the process returns to the determination (S503) as to whether or not the required time has elapsed. The determination is made as to whether or not the 32nd step is performed until one second has elapsed from the edge position (S511) and the step counter is incremented (S541).
Is repeated.

Then, it is determined whether or not it is the 32nd step (S
If it is determined in step 511) that the 32nd step has been reached, as shown in FIG. 5, the step counter is cleared (S513), and it is determined whether or not the marker signal has continued twice (S515). This is performed based on the flag and the non-marker flag, and when it is determined that the marker signal is not continuous, the level detection up to the twelfth step is performed again (S523), and the marker flag is set according to the count value of the pulse width counter. The setting (S537) or the setting of the non-marker flag (S539) is performed.

In the 32nd step, when it is detected that the marker flag is continuous and the marker signal is continuous, the second counter is set to 1 (S517), and the detection completion flag is set (S519). Then, the detection of the 0 second position (S350) is completed. Accordingly, in the detection of the 0-second position (S350), as shown in FIG.
If the number of times of detection of the marker signal is 0.2 seconds, which is more than the number of times that should be detected, and the number of short pulses representing a binary "1" is less than 0.5 seconds, which is 9 or less, the marker is used. A flag is set, and a marker signal can be correctly detected by excluding a time code signal of a short pulse or a long pulse in which an active level for 0.5 seconds or 0.8 seconds is set.

As shown in FIG. 16B and FIG. 16C, even when an unstable radio wave in a receiving state is demodulated, a marker flag is set when the count is 9 or less and 4 or more. Thus, the marker signal can be detected while eliminating the detection of the active level due to instantaneous noise. Further, as shown in FIGS. 16B and C, even when an unstable radio wave in a reception state is demodulated, the detection time of the marker signal is set to about 0.4 seconds from the code output start point. Since the first to twelfth steps are to be detected, since the reception state is unstable, the first step which should be the edge position obtained in the one-second synchronization (S340) process and the output start point in the regular code signal Can detect a marker signal even when is slightly shifted.

Even if the reception state is extremely unstable, the reception time should be within about 0.4 seconds from the start point of the code output.
When the active level is detected more than once, it is handled as a marker signal, so that the marker signal can be detected even with a weak radio wave. In the case of an extremely weak radio wave, a code signal such as a time code signal may be erroneously determined to be a marker signal. In this case, however, the erroneous position is temporarily set to the 0 second position so that the next time code signal can be determined. The pulse width detection (S360) and the code conversion (S370) are performed to determine whether or not the numerical value of the obtained time data is an appropriate value to correct the error.

Then, in the pulse width detection processing (S360) performed after the detection of the 0 second position (S350), first, as shown in FIG. 7, it is determined whether or not the required time has elapsed (S60).
1) is performed, and when the required time has elapsed, the time-over flag is set (S603), and the pulse width detection processing (S360) is completed. If it is within the required time, it is determined whether the required time has elapsed (S60).
After 1), it is determined whether 20 seconds or more have elapsed from the 0 second position (S605), that is, it is determined whether or not the time code signal is a minute data signal or an hour data signal. A determination is made as to whether or not it is the 32nd step (S611).

In the judgment of the number of steps (S611), if it is not the 32nd step, that is, in the process based on each interrupt signal within one second, the level detection (S621) of the signal output by the reception demodulation means 15 is performed by the sampling pulse. It is determined whether or not the signal is at the H level (S623). If the signal is at the L level, 1 is added to the value of the L level counter (S625).

Then, as indicated by reference numeral K in FIG. 8, it is determined whether or not the operation is the 16th step (S631).
When the sixteenth step is reached, that is, when 0.5 seconds, which is the time width of a short pulse, has elapsed from the first step matched with the code output start point, whether or not the count value of the L level counter is 0 If it is determined that the value is not 0 (S633), the S flag is set (S635) and the L level counter is cleared (S637).

Also, it is determined whether or not the step is the 26th step (S64).
1) is performed, and when the process reaches the 26th step, that is, when the time width of the long pulse of 0.8 seconds has elapsed from the first step matched with the output start point of the code, the count value of the L level counter becomes It is determined whether or not it is 0 (S643). If it is not 0, the L flag is set (S645) and the L level counter is cleared (S647).

Further, in each step, detection of L level (S6)
21) and level determination (S625), and setting of the S flag in the 16th and 26th steps (S635)
While the L flag is set (S645), 1 is added to the value of the step counter in each step (S665), and it is determined whether or not an interrupt request has been made (S667). It is determined whether or not the time has passed (S
601) and whether or not 20 seconds or more have elapsed (S60)
The process returns to step 5) and to determine whether or not it is the 32nd step (S611).

When the 32nd step is reached,
That is, when one second has elapsed from the edge position which is the code output start point, as shown in FIG. 7, the step counter is cleared (S613), the L level counter is also cleared (S615), and the second counter is cleared. One is added to the count value (S617), the measurement completion flag is set (S619), the pulse width detection process (S360) is completed, and the code conversion process based on the S flag and the L flag (S370) is performed. .

The pulse width is detected (S360).
In the case of 20 seconds or more, as shown in FIG.
It is determined whether or not the current step is a step (S611). If the step does not reach the 32nd step, as indicated by a symbol L in FIG.
Simply adding 1 to the value of the step counter (S665), and repeatedly determining whether or not an interrupt request has been made (S667). When the 32nd step is reached, as shown in FIG. Set (S663), clear the step counter (S613), clear the L level counter (S615), further add 1 to the count value of the second counter (S617), set the measurement completion flag (S619), and set the pulse width. Is ended (S360).

Therefore, this pulse width detection processing (S36)
0) indicates that the level is detected by a sampling pulse, for example, 32 times during one second at 0 second or every second from 1 second to 19 seconds by a sampling pulse, and the active level is detected within 0.5 second from the output start point of the code signal. The S flag is set when the L level is detected at least once, and the L flag is set when the L level which is the active level is detected even once within 0.5 to 0.8 seconds. The pulse width detection process (S360) is terminated every second and the next code conversion process (S370) is performed.

In the judgment (S633, S643) whether or not the count value of the level counter is 0, the count value is 2
Alternatively, it may be determined whether or not the number is three or more. Then, as shown in FIG. 9, in the code conversion process (S370), first, it is determined whether or not the S flag is set (S701), and then, when the S flag is set and when the S flag is set, as shown in FIG. If not set, it is determined whether the L flag is set (S702, S70).
4).

Then, it is determined whether the S flag is set (S70).
1) and L flag set determination (S702), S
When it is determined that both the flag and the L flag are not set, that is, the active level is within a short pulse time width of 0.5 seconds from the output start point of each code from the 0 second position to the 19 second position. L level is not detected at all, and between the output start point of each code from the 0 second position to the 19 second position and 0.5 seconds or later and 0.8 seconds which is the time width of a long pulse. If the L level, which is the active level, is not detected at all, an error flag is set (S703), and the code conversion process (S370) is ended, as indicated by the symbol N in FIG.

Then, the S flag set is determined (S70).
1) and L flag set determination (S704), S
The flag is set and 0 .0 from the code output start point.
The L level which is the active level is detected within 5 seconds, and the L level which is the active level is 0.5 seconds to 0.8 seconds after the code output start point without setting the L flag. If no level is detected,
The code "1" is set (S706).
After the determination of the S flag set (S701), the determination of each L flag set (S
702, S704), when it is determined that the L flag is set, the code "0" is set (S70).
5) What you do.

Thereafter, the S flag and the L flag are reset (S707), and it is determined whether 20 seconds have elapsed from the 0 second position (S711). And 2
If it is less than 0 seconds, it is determined whether or not the process is a process of a 10-minute digit, that is, whether or not it is a process of the first to third seconds (S713). The numerical value is recorded based on the code “0” or the code “1” (S715).

Recording of this 10-minute digit (S715)
If the code of the first second is “1”, the numerical value is “40”, if the code of the second second is “1”, the numerical value is “20”,
If the code at the third second is "1", the numerical value is added as "10", and if each code is "0", the numerical value "0" is added. This numerical value is recorded by using a shift register for the 10-minute digit counter, inputting "0" or "1" every second and sequentially shifting "0" or "1" to the 10-minute digit. Numeric values can be recorded.

After the determination as to whether or not the processing is for the 10-minute digit (S713), whether or not the processing is for the 1-minute digit, that is, whether or not the processing is for the fifth to eighth seconds. (S71
7), and if it is a one-minute digit, a numerical value is recorded based on the code “0” or “1” (S719). In the recording of the one-minute digit value (S719), if the code at the 5th second is “1”, the numerical value is “8”, and if the code at the 6th second is “1”, the numerical value is “4”. The code for the 7th second is "1"
If so, the numerical value is set to "2", and if the code at the 8th second is "1", the numerical value is set to "1" and added to the shift register in the same manner as for the 10-minute digit.

Further, it is determined whether or not the processing is for one-minute digits (S
After 717), it is determined whether or not the process is for the 10:00 digit, that is, 1
It is determined whether or not the processing is the second to thirteenth seconds (S72).
Perform 1), and if it is a 10 o'clock digit, code “0” or “1”
Is recorded (S723) based on.
After the determination of whether or not the processing is for the 10:00 digit (S721), it is determined whether or not the processing is for the 1 hour digit, that is, from the 15th second to the 1st.
It is determined whether or not the process is for the 8th second (S725).
If it is the 1 o'clock digit, a numerical value is recorded based on the code “0” or “1” (S727).

In the process of recording the numerical value at the 10-hour digit and the 1-hour digit (S723, S727), similarly to the 10-minute digit and the 1-minute digit, the numerical value is recorded in the shift register based on the code “0” or “1”. It is something to keep. Then, each digit is determined every second (S713, S717, S721, S725) and necessary numerical values are recorded (S715, S719, S723, S723).
After performing S727), the code conversion process (S370) is ended, as indicated by reference numeral P in FIG.

As described above, the code conversion processing (S37)
In (0), as shown in FIG. 9, when the S flag or the L flag is determined (S701, S702, S704) and either the S flag or the L flag is detected, the code “0” or “ 1 "(S705, S706), and further, the S flag and the L flag are reset (S70
After 7), it is determined whether or not it is longer than 20 seconds (S711).

Then, it is determined whether or not the time is longer than 20 seconds (S
If it is determined that the time is 20 seconds or longer according to 711), it is first determined whether or not it is the 20th second (S731), as indicated by reference symbol O in FIG. It is determined whether or not it is the second time (S733)
Is what you do. Further, based on the determination as to whether or not it is the second time (S733), the 10-minute register or 1
If the value of the minute digit register, the value of the 10 hour digit register and the value of the 1 hour digit register are not stored in the memory for the first time, it is determined whether the value of the minute digit register is 10 or more. The judgment is made (S741), and if it is 10 or more, an error flag is set (S747).

If the value of the 1-minute register is less than 10, it is determined whether the value of the 10-minute register is 6 or more (S742). The flag is set (S747), and if it is less than 6, it is determined whether or not the value of the hour digit register is 10 or more (S7).
43) is performed. Further, if the value of the 1-hour digit register is 10 or more, an error flag is set (S747), and
If it is less than 0, it is determined whether or not the value of the 10:00 digit register is 3 or more (S744), and if it is 3 or more, an error flag is set (S747).

If the value of the 10-hour digit register is less than 3, the time data is obtained by adding one minute to the time data.
The value of each register to which 1 minute has been added is transferred to the memory, the register is cleared, and the value of each digit of 1 minute digit, 10 minute digit, 1 hour digit, 10 hour digit is stored in the memory (S745). It is. Thus, it is determined whether or not the time is longer than 20 seconds (S711).
Then, according to the determination as to whether or not it is the 20th second (S731), if it is the 20th second, it is determined whether or not each digit is an appropriate numerical value (S741, S741).
After performing S742, S743, and S744) and storing the result in the memory (S745), and setting the error flag (S747) because any numerical value is an inappropriate value,
If the time is equal to or longer than 20 seconds and not the 20th second, the code conversion process (S370) is terminated, and as shown in FIG. 2, it is determined whether or not it is the second time (S321) and whether or not there is a data error. Is determined (S323), and the process returns to the pulse width detection processing (S360) as shown in FIG.

In the code conversion process (S370), when the error flag is set (S703) because neither the S flag nor the L flag can be detected, or when the value of each digit of the time code is inappropriate, an error occurs. When the flag is set (S747), in the data error determination (S323) shown in FIG. 2, it is determined that an error has been detected, and as shown in FIG. 1, one second synchronization (S34) is performed again.
0).

As described above, when no active level is detected for 0.8 seconds from the edge position in any one second from the 0th to 19th seconds, the 1-second synchronization (S340) is performed again. Since the processing is started from the processing, in the radio wave state where no active level of the marker signal or the code signal indicating the code “0” or “1” can be detected within 0.8 seconds at which the active level should exist, synchronization for one second (S3
It is possible to prevent the reading of the incorrect time data value due to noise by repeating the processing of 40). When the value of the time data falls within the proper value range due to a code analysis error, the time data is read again and
If the value of the time data analyzed consecutively is 1 minute, the analysis process is terminated, and reading of incorrect time data is prevented.

That is, in the code conversion process (S370), the value of the 1 minute digit, the 10 minute digit, and the 1 hour digit and the 10 hour digit has already been determined in the determination whether the second time is to be performed at the 20th second (S733). 1 minute digit, 10 minute digit, 1 hour digit and 10:00 are stored in the memory, and are again stored in the register as numerical values of each digit based on the S flag and the L flag from each data of the first to 18 seconds. When a numerical value is recorded as an appropriate digit value, a completion flag is set (S735), and the code conversion process (S370) ends.

Then, based on the completion flag, if it is determined that the second time has been reached (S321), the data comparison (S380) is performed. In this data comparison (S380), As shown in FIG.
A determination is made as to whether the value of each digit of the time code matches the value stored in each memory and the value of each register (S801). Is changed to the unit of 12 hours indicated by (S803), and
The start of the clock body for reset start of each timer, frequency divider, etc. of the clock body at the start point of the second position (S8
05), and if the value of any digit differs between the memory and the register, the error flag is set (S
807).

In reading the time data by analyzing the time code, as shown in FIG. 2, it is determined whether or not the data matches after the data comparison (S840) (S325). When is detected,
The process is performed again from the one-second synchronization (S340) process. When the clock body is started (S805), the reading completion flag is set (S3) after the data comparison processing (S380) and the data coincidence determination (S325).
27), and further prohibits a timer interrupt of 32 Hz (S329), and terminates the process of receiving the standard radio wave and reading the time (S115 or S123).

In the code conversion process (S370), when the code "1" or the code "0" is set by the S flag or the L flag, the signal is activated within 0.5 seconds within the short pulse time by the S flag. When the active level is detected within 0.5 seconds to 0.8 seconds after the absence of the L flag due to the absence of the L flag, the code “0” is set instead of setting the code “1”. Is set, and when it is determined from the L flag that the active level has been detected from 0.5 seconds to 0.8 seconds, the code "1" is set instead of the code "0". Sometimes set, in this case,
At the time of numerical conversion of time data, code “1” is set to 0,
The code "0" is changed to the numerical value 1, 2, 4, 8 according to the position.
And so on.

As described above, in the present embodiment, the process of receiving the standard radio wave and reading the time (S115 and S123)
At 1 second synchronization (S340) and 0 second position detection (S
After the step 350), regarding the second signal which is the position of the time code signal, if there is an active level even for an instant within 0.5 seconds indicating “1”, it is set to “1” or “0”, and “0” is set. Of the 0.8 seconds shown, if there is an active level even for an instant within the time after 0.5 seconds, the time code is analyzed as "0" or "1". Even when the time code cannot be accurately restored, the time code can be read.

Then, since the analysis results in the range of the appropriate value of the time code which are consecutive twice are collated, the standard time read from a weak radio wave is checked, and an error due to an uncertain signal such as noise is regarded as a read error. You can remove it and read the correct time data for Japan Standard Time. Note that the detection of the active level at the time of conversion to the code “0” or “1” is not limited to one detection, and the S flag and the L flag are set by detecting the active level several times. As described above, the determination of the code “0” or “1” may be performed by detecting the time.

It goes without saying that the number of interrupts for performing each detection processing and the like in one second is not limited to 32. Further, the process of receiving the standard radio wave and reading the time (S115 or S123) is performed in the same manner even with a digital clock body, and the data comparison (S380) is performed on a 24-hour digital clock. ) Is omitted in the process of 12 hours (S803).

[0093]

According to the first aspect of the present invention, after performing 1-second synchronization and 0-second position detection, in a time code reading process, output of a code in which each bit data is represented by the length of a pulse width is started. From the point, the level of the data signal and the hour data signal is detected for the time of the long pulse width, and when the active level is detected only within the time of the short pulse, the code is set to "1" or "0". If the active level is detected after the lapse of time, the code is set to "0" or "1". If the minute data and the hour data are not within the appropriate range, the process is repeated from 1 second synchronization and 0 second position detection. This is a method of analyzing a time code in a radio-controlled timepiece.

Therefore, when the active level is detected within a short pulse width time and within a short pulse width time within 0.8 seconds, which is a long pulse width time, and even after a short pulse width, respectively, the code "1" or Since the time data is obtained as "0", the time data of the Japan Standard Time can be obtained by receiving the standard time signal even for a weak standard time signal, and the time can be displayed in accordance with the Japan Standard Time.

[0095] For this reason, even in a place where the reception condition is not good, a radio-controlled timepiece can be installed to display an accurate time. Further, according to the present invention, the level detection is performed several tens of times per second based on the interrupt signal.
The code "1" or "0" of the time code signal is identified by detecting the active level one or several times.
The time code analysis method in the radio-controlled timepiece described in (1).

Therefore, there is no need to perform arithmetic processing based on the number of times the active level has been detected, and it is possible to easily perform the determination processing to form the code “1” or “0” and read the time data in Japan Standard Time. In the present invention according to claim 3, when the level detection is performed, if no active level can be detected within a long pulse width time from the output start point of each code, 1 second synchronization and 0 second position detection are performed. 2. The process of receiving a standard radio wave and performing code analysis again.
Alternatively, it is a method of analyzing a time code in a radio-controlled timepiece according to a second aspect.

Therefore, in a radio wave state in which the active level of the marker signal or the code signal indicating the code “1” or “0” cannot be detected at all, reading of the wrong time data value is prevented, and the correct time in Japan Standard Time is prevented. Data can be read. Furthermore, the present invention according to claim 4 is that the time data of the appropriate value is obtained twice consecutively within the required time, and the values of the time data read continuously match by one minute difference, or The method for analyzing a time code in a radio-controlled timepiece according to any one of claims 1 to 3, wherein the standard radio wave analysis processing is terminated when the set required time has elapsed.

As described above, the analysis process is terminated when the values of the time data, which are successively read appropriate values, match with a difference of one minute, so that when the correct time data of the Japan Standard Time is read, the processing is terminated. You can end.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the overall operation of a time code analysis process in a radio-controlled timepiece according to the present invention.

FIG. 2 is a flowchart showing the entire operation of a time code analysis process in the radio-controlled timepiece according to the present invention.

FIG. 3 is a flowchart showing a control operation of one-second synchronization in the analysis processing according to the present invention.

FIG. 4 is a flowchart showing a control operation of one-second synchronization in the analysis processing according to the present invention.

FIG. 5 is a flowchart showing a control operation for detecting a 0-second position in the analysis processing according to the present invention.

FIG. 6 is a flowchart showing a control operation for detecting a 0-second position in the analysis processing according to the present invention.

FIG. 7 is a flowchart showing a control operation of pulse width measurement in the analysis processing according to the present invention.

FIG. 8 is a flowchart showing a control operation of pulse width measurement in the analysis processing according to the present invention.

FIG. 9 is a flowchart showing a control operation of code conversion in the analysis processing according to the present invention.

FIG. 10 is a flowchart showing a control operation of code conversion in the analysis processing according to the present invention.

FIG. 11 is a flowchart showing a control operation of data comparison in the analysis processing according to the present invention.

FIG. 12 is a diagram showing an example of a circuit block of a conventional radio-controlled timepiece.

FIG. 13 is a time chart showing the overall control operation of a conventional radio-controlled timepiece.

FIG. 14 is a view showing a code format of a Japanese standard radio wave.

FIG. 15 is a time chart showing an example of radio wave analysis processing in a conventional radio-controlled timepiece.

FIG. 16 is a diagram illustrating an example of a demodulated Japanese standard radio signal.

[Explanation of symbols]

Reference Signs List 11 microcomputer 13 bar antenna 15 reception demodulation means 17 crystal oscillation circuit 19 reset switch 21 movement 23 motor drive buffer 25 second hand motor 27 hour and minute hand motor 31 second hand sensor 33 hour and minute hand sensor 37 reading and displaying means

Claims (4)

[Claims] When reading time data by performing standard radio wave reception and code analysis processing, after performing 1-second synchronization and detecting a 0-second position of a code signal in the standard radio wave, sampling is performed in a time code reading process. The level of the code signal is detected by the pulse, and the level of the data signal position and the hour data signal position for the time of the long pulse width from the output start point of each code in which the data of each bit is represented by the length of the pulse width If detection is performed and the active level is detected only during the short pulse width, either code "1" or code "0" is used. If the active level is detected after the short pulse width has elapsed, the code is used. The value of minute data and hour data is used for normal time display as a result of code analysis as either "1" or code "0". A time code analysis method for a radio-controlled timepiece, wherein the process of receiving the standard radio wave and performing the code analysis from the one-second synchronization and the zero-second position detection is performed again when the value is not within the value range. 2. The level detection of a code signal is performed several tens of times within one second based on an interrupt signal, and detection of an active level which is one or several H levels or L levels during the number of samplings. 2. The time code analysis method for a radio-controlled timepiece according to claim 1, wherein the identification of "1" or "0" of each code in the time code signal is performed by the following. 3. When level detection is performed, if no active level can be detected within the time of the long pulse width from the output start point of each code, the standard radio signal is again transmitted from 1 second synchronization and 0 second position detection. 3. The time code analyzing method in a radio-controlled timepiece according to claim 1, wherein the time code is received and analyzed. 4. When a required time is set, time data of an appropriate value is obtained twice consecutively within the required time, and when values of time data read continuously match by one minute, or 4. The standard radio wave analysis processing is terminated when a set required time has elapsed.
The time code analysis method in the radio-controlled timepiece described in any one of the above.