JP2004003931A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of outputting almost exact time data, even where exact time information based on external radio information cannot be obtained. <P>SOLUTION: A radio controlled clock 1 comprises an antenna 21 and a receiving circuit 22 for receiving external radio information including time information, a time counter 53 for clocking internal time, etc. Furthermore, the control circuit 24 of the clock 1 comprises a comparison circuit 54 for comparing the received external time data and the internal time data and outputting the difference, a received information memory 71, where the data of time the receipt of the external radio information and the difference are at least stored by an amount corresponding to a plurality of times, a correction quantity calculating part 62 for calculating a predicted correction quantity from the receiving time data, the difference data and an elapsed time from the previous reception time, and an internal time correction controller 61 for correcting the internal time, by using the predicted correction quantity. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic device that receives external wireless information and performs processing such as operation correction, and for example, relates to an electronic device represented by a radio-controlled timepiece that receives external time information and corrects time.
[0002]
[Background Art]
2. Description of the Related Art There are known electronic devices that receive external wireless information and correct operation, for example, a radio-controlled timepiece that receives external time information and corrects time.
Such radio-controlled timepieces receive standard radio waves at a set reception time, for example, 2:00 am every day, in addition to forced reception, in which the user operates a crown or button to forcibly receive standard radio waves. The automatic reception function that automatically corrects the time is set.
[0003]
By the way, the accuracy of recent quartz timepieces is less than ± 20 seconds per month even in general, and there is a high accuracy type having a difference of about ± 10 seconds per year. For this reason, there is a case where an error during operation for one day hardly occurs, and in many cases, the time correction is not required even when the standard radio wave is received.
As a result, since it is not necessary to correct the time, a useless radio wave reception operation is performed, and power is wasted. In particular, since the receiving operation is the process that consumes the most power in a timepiece, there has been a problem that, for example, the life of the battery is shortened in a battery-driven wristwatch or the like.
[0004]
In order to avoid the waste of power consumption, there has been known a technique in which a reception interval is changed in accordance with an amount of time correction by radio wave reception at a certain point in time (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-7-159559
[0006]
[Problems to be solved by the invention]
However, when electromagnetic noise is generated by an external magnetic field or an internal generator, the noise may affect external wireless information and correct time information may not be obtained. In addition, when external radio information is received, correct time information may not be obtained because radio waves could not be received because the user was in a place where radio waves could not be easily received, such as in a building, subway, or underpass. In these cases, the above publications have a problem that time information cannot be obtained, so that the internal time cannot be corrected based on the time information, and that it becomes difficult to output accurate time data.
Such a problem occurs not only in the radio-controlled timepiece but also in various electronic devices such as a personal computer, an electronic toy, and a timer that control specific operations using accurate time information.
[0007]
A first object of the present invention is to provide an electronic device capable of outputting substantially accurate time data even when correct time information based on external wireless information cannot be obtained.
[0008]
Further, in the publication, the next reception time is determined by the correction amount at a certain point in time, and it does not take into account the characteristics of the electronic circuit, the use environment, and changes in conditions such as changes over time. If the amount of correction at the time of receiving the radio wave is very small, what is received every hour may be received up to 24 hours later. For this reason, there is a possibility that the time of the device may be largely shifted before the next reception, and there is a problem that an accurate time may not be displayed.
[0009]
A second object of the present invention is to provide an electronic device capable of outputting more accurate time data while reducing power consumption accompanying reception.
[0010]
Further, in the above-mentioned publication, when the correction amount is large, a pointing error is likely to occur, and therefore, it is dealt with only by shortening a radio wave reception interval. For this reason, there has been a problem that the number of times of radio wave reception does not decrease so much as a whole, and the effect of reducing power consumption is limited.
[0011]
A third object of the present invention is to provide, in addition to the second object, an electronic device capable of reducing power consumption associated with reception and outputting accurate time data even when the correction amount is large. It is in.
[0012]
[Means for Solving the Problems]
The electronic device of the present invention has an external wireless information receiving unit that receives external wireless information including time information, an internal time counting unit that counts internal time based on a reference clock, and an external wireless information receiving unit that receives the external wireless information. A time data comparing unit that compares the external time data as time information and the internal time data measured by the internal time counting unit and outputs a difference amount between the external time data and the internal time data, a storage unit, a reception control unit, and a display unit. The storage unit includes a reception information storage unit in which the external wireless information is received by the external wireless information receiving unit and each data of the difference amount at that time is stored at least a plurality of times, and the reception control unit includes: A correction amount calculation unit that calculates a predicted correction amount based on the plurality of reception timing data, difference amount data, and an elapsed time from the previous reception, and an internal time using the difference amount or the predicted correction amount. An internal time correction control unit that corrects the internal time, wherein the display unit displays a time type indicating whether the internal time is a time corrected by the difference amount or a time corrected by the predicted correction amount. It is characterized by doing.
[0013]
The electronic device of the present invention has an external wireless information receiving unit that receives external wireless information including time information, an internal time counting unit that counts internal time based on a reference clock, and an external wireless information receiving unit that receives the external wireless information. A time data comparing unit that compares external time data as time information and internal time data measured by the internal time counting unit and outputs a difference amount thereof; a storage unit; and a reception control unit; A reception information storage unit in which the external wireless information receiving unit receives the external wireless information and the data of the difference amount at that time are stored at least a plurality of times, and the reception control unit includes the plurality of reception units. A correction amount calculation unit that calculates a predicted correction amount based on time data, difference amount data, and an elapsed time from a previous reception, and an internal time correction that corrects an internal time using the predicted correction amount It is characterized in further comprising a control unit, a.
[0014]
In the present invention, when the external wireless information is received by the external wireless information receiving unit, the received time information is compared with the internal time data measured based on the reference clock generated inside the electronic device by the time data comparing unit. The difference is output by comparison, and the data of the difference and the reception time are stored in the reception information storage unit.
Further, the present invention includes an internal time correction control unit that calculates a predicted correction amount based on past reception data, that is, based on a plurality of reception times and a difference amount in the past, and corrects an internal time with the calculated value. Even if the time information based on the external wireless information cannot be obtained, or if the user wants to correct the time without receiving the external wireless information at any time, the time based on the predicted correction amount is used. The internal time can be corrected in this way, and the occurrence of a large time shift can be suppressed.
It should be noted that acquisition of time information fails (when acquisition is not possible) means that external radio information was not received when it happened to be in a building or subway, or external electronic information could not be received. Time information could not be obtained because external radio information could not be received due to the influence of external electromagnetic noise, or because incorrect data was received due to noise in the external radio information. It means that it could not be obtained. Therefore, it is preferable that the internal time correction control unit corrects the internal time using the predicted correction amount, for example, when the acquisition of the time information by the external wireless information receiving unit in the external wireless information receiving unit has failed.
[0015]
In the present invention, the reception control unit includes a reception schedule control unit that controls a reception schedule in the external radio information reception unit, and the internal time correction control unit receives external radio information based on a reception schedule. When the acquisition of the time information fails, the internal time is preferably corrected using the predicted correction amount.
[0016]
According to the present invention, at the time of automatic reception of external wireless information by the reception schedule control unit, even if acquisition of time information based on the wireless information fails, the internal clock can be corrected with the predicted correction amount. Deviation can be suppressed.
[0017]
In the present invention, the reception control unit includes a reception schedule control unit that controls a reception schedule in the external wireless information reception unit, and the internal time correction control unit changes a reception schedule by the reception schedule control unit. It is preferable to correct the internal time by using the predicted correction amount when the reception is not performed while the reception time is in the reception schedule of the initial setting.
[0018]
According to the present invention, in the initial reception schedule, when reception is not performed at the timing of radio wave reception, time correction using the predicted correction amount is performed. Time accuracy similar to that in the case of receiving can be ensured, and accurate time data can be output.
[0019]
In the present invention, the electronic device includes an external operation unit that instructs the external wireless information receiving unit to forcibly receive external wireless information, and the internal time correction control unit allows a user to operate the external operation unit. When acquisition of time information by reception of the external wireless information fails when the forced reception is instructed in step (1), the internal time may be corrected using the predicted correction amount.
[0020]
According to the present invention, at the time of forced reception by manual operation, even if acquisition of time information based on the wireless information fails, the internal clock can be corrected with the predicted correction amount, so that occurrence of a large time deviation can be suppressed. Can be.
[0021]
In the present invention, the electronic device includes a magnetic field detection unit that detects electromagnetic noise, and the reception control unit prohibits reception or reception by an external wireless information reception unit when the magnetic field detection unit detects electromagnetic noise. It is preferable to include a reception processing control unit that invalidates data.
[0022]
According to such an invention, the time information received by the external wireless information receiving unit is compared with the internal time data by the time data comparing unit, and the difference amount is output. It is stored in the section.
At this time, electromagnetic noise such as high-frequency noise and AC wave noise from the outside when receiving radio waves, and electromagnetic noise generated by the power generation of an electromagnetic generator when the electronic device is incorporated in an electronic device, are generated by the external wireless communication. There is a possibility that external wireless information cannot be received due to the influence of the information receiving unit, or that the wireless information is subject to noise and erroneous data is received.
According to the present invention, when the electromagnetic field is detected by the magnetic field detection unit, the reception operation is prohibited or the reception processing control unit that invalidates the received data is provided. It is also prevented that the time is corrected based on the external wireless information affected by the time.
Furthermore, even when the time information cannot be obtained from the external wireless information due to the influence of the electromagnetic noise, the correction amount calculation unit and the internal time correction control unit, based on the past reception data, that is, a plurality of reception times and times in the past Since the predicted correction amount is calculated based on the difference amount, and the internal time is corrected based on the calculated value, the occurrence of a large time deviation can be suppressed.
[0023]
In the present invention, the reception control unit includes a reception schedule control unit that controls a reception schedule in the external radio information reception unit, and the internal time correction control unit receives external radio information based on the reception schedule. At this time, when electromagnetic noise is detected by the magnetic field detection unit and reception operation is prohibited or reception data is invalidated by the reception processing control unit and acquisition of time information fails, internal prediction is performed using the predicted correction amount. It is preferable to correct the time.
[0024]
Further, the electronic device of the present invention includes an external operation unit for instructing the external wireless information receiving unit to forcibly receive external wireless information, and the internal time correction control unit operates the external operation unit by a user. When the forced reception is instructed, when the electromagnetic noise is detected by the magnetic field detection unit and the reception processing is disabled by the reception processing control unit or the reception data is invalidated and the acquisition of the time information fails, The internal time may be corrected using the predicted correction amount.
[0025]
At the time of automatic reception of external wireless information by the reception schedule control unit or forced reception by manual operation, reception of wireless information with detected electromagnetic noise was not performed, or received data was invalidated and time information could not be obtained. Even in this case, since the internal clock can be corrected with the predicted correction amount, occurrence of a large time deviation can be suppressed.
[0026]
The electronic device of the present invention has an external wireless information receiving unit that receives external wireless information including time information, an internal time counting unit that counts internal time based on a reference clock, and an external wireless information receiving unit that receives the external wireless information. A time data comparing unit that compares external time data as time information and internal time data measured by the internal time counting unit and outputs a difference amount thereof; a storage unit; and a reception control unit; Comprises a reception information storage unit in which the external radio information is received by the external radio information reception unit and each data of the difference amount at that time is stored at least a plurality of times, and the reception control unit includes the reception information storage unit. A reception schedule control unit that controls a reception schedule in the external wireless information reception unit based on the plurality of reception time data and difference amount data stored in the unit. And it is characterized in Rukoto.
[0027]
According to such an embodiment of the present invention, the external wireless information receiving unit operates according to the predetermined receiving schedule by the receiving schedule control unit, and receives the external wireless information. The received time information is compared with the internal time data by the time data comparing unit, and the difference amount is output. Each data of the difference amount and the reception time is stored in the reception information storage unit.
Then, the reception schedule control unit controls (changes) the reception schedule based on each data of the difference amount and the reception time. As described above, in the present invention, the future (future) reception schedule is controlled by using a plurality of data received in the past. Therefore, the time error of the reception is changed as compared with the case where the reception interval is changed only by one reception data. Therefore, the reception interval can be adjusted by reliably grasping the tendency, the possibility of occurrence of an error can be reduced, and the deviation of the time data output to the display unit or the like can be minimized. Further, since the reception schedule can be changed to increase the reception interval, power consumption can be reduced, and the battery life can be prolonged in the case of battery operation.
[0028]
A correction amount calculating unit that calculates a predicted correction amount based on the plurality of reception timing data, the difference amount data, and an elapsed time from the previous reception; and an internal time correction control that corrects an internal time using the predicted correction amount. And a unit.
In such a configuration, even when the reception interval becomes large, the estimated correction amount based on the difference amount and the reception timing can be calculated, and the time can be adjusted by the predicted correction amount. Even in such a case, only time correction can be performed during that time, so that errors in internal time data can be reduced.
[0029]
The internal time correction control unit may correct the internal time using the estimated correction amount when the reception schedule is changed and the reception is not performed while the reception time is in the default reception schedule. preferable.
With such a configuration, in the initial reception schedule, if reception is not performed at the timing of radio wave reception, time correction using the predicted correction amount is performed, so even if radio wave reception is not performed, It is possible to ensure the same time accuracy as in the case where radio wave reception is performed, and to output accurate time data.
[0030]
In the present invention, the reception schedule control unit may determine that the average value of the time correction values per unit time obtained by the reception time and the difference amount is smaller than or equal to or less than the first set value for the average value, and / or If the variation of the reception is smaller than the first setting value for variation, it is preferable to change the reception schedule so that the reception interval is longer than the initial setting.
If the average value of the time correction values per unit time is small, even if the time during which reception is not possible is long, the error amount during that time can be kept small. Further, even when the variation of the time correction value is as small as the first set value for variation or less, even when the radio wave cannot be received, the error can be reduced by using the predicted correction amount.
Here, the first set value for the average value and the first set value for the variation may be appropriately set in implementation, and are set according to, for example, the time accuracy required for the electronic device. For example, when accuracy of about 10 to 20 seconds per month is required, if the first set value for the average value is represented by a time correction value per day, for example, 10 to 20 seconds per month / 30 days or less, specifically, It may be set to about 0.25 seconds / day. In addition, the first set value for variation is usually set smaller than the first set value for average value. For example, the first set value for average value is set to less than half of the first set value for average value, specifically, about 0.1 second / day. Just set it.
[0031]
In addition, when the average value of the time correction value is smaller than the first set value for the average value, or when the variation of the time correction value is smaller than the first set value for the variation, the case is one of: The reception interval may be longer than the initial setting, but in order to more reliably reduce the time indication error, the average value of the time correction value is equal to or less than the first set value for the average value, and When the value variation is smaller than or equal to the first variation setting value, the reception schedule may be changed so that the reception interval is longer than the initial setting.
Therefore, the reception interval can be lengthened, and the power consumption can be significantly reduced accordingly. In addition, since the amount of error is small, it is not always necessary to correct the time with the predicted correction amount while radio wave reception is not performed. Therefore, power consumption can also be reduced in this regard.
[0032]
Further, in the present invention, it is preferable that the reception schedule control unit changes the reception schedule so that the reception interval is longer than the initial setting by skipping the reception time in the reception schedule of the initial setting at least once. For example, when the initial setting is a schedule for receiving once a day, a schedule for skipping once reception is set to be received once every two days, or a schedule for skipping twice reception and receiving once every three days. It may be.
With such a change of the reception schedule, the change of the reception schedule can be easily performed.
[0033]
Further, in the present invention, the reception schedule control unit may be configured such that an average value of the time correction values per unit time obtained by the reception time and the difference amount is as large as or more than a second set value for the average value, and / or If the variation of the time correction value for each reception time is as large as or more than the second setting value for variation, it is preferable to change the reception schedule so that the reception interval is shorter than the initial setting.
[0034]
When the average value of the time correction values is equal to or more than the second set value for the average value, or when the “variation” is larger than the “second set value for variation”, the fluctuation per unit time is large. There is a possibility that an error may occur even if the correction is made in the step.
According to the present invention, even in such a case, by increasing the number of times of actually receiving radio waves, it is possible to reliably grasp the change and correct the time, thereby improving the time accuracy.
Here, the second set value for the average value may be at least not less than the first set value for the average value, and the second set value for variation may be at least not less than the first set value for variation. May be appropriately set for implementation. For example, each second set value is set to be twice or less of each first set value, for example, about 1.2 to 1.5 times.
[0035]
In addition, when the average value of the time correction value is greater than or equal to the second set value for the average value, or when the variation of the time correction value is greater than or equal to or greater than the second set value for variation, The reception interval may be shorter than the initial setting, but the average value of the time correction values is equal to or greater than the average value second setting value, and the variation of the time correction value is equal to or greater than the variation second setting value. If it is larger, the reception interval may be set to be changed to a reception schedule that is shorter than the initial setting.
As described above, if the reception interval is set to be short only when both conditions are satisfied, priority is given to suppressing an increase in power consumption due to the reception process, rather than to shortening the reception interval and improving time accuracy. This is effective when a power saving mode or the like is provided.
Here, in the present invention, the variation of the time correction value refers to a deviation from the regression equation when a regression equation (regression equation) is obtained by each time correction value. The regression equation is usually a regression line based on the least squares method, but may be a regression curve such as a sine curve or a quadratic curve depending on data.
[0036]
Here, in the present invention, the storage unit includes a reception schedule storage unit in which a plurality of reception schedule information in the external wireless information reception unit are stored, and the reception schedule control unit includes a reception schedule stored in the reception schedule storage unit. It is preferable to control the reception schedule by selecting information.
With such a configuration, the schedule can be changed only by selecting the reception schedule information, so that the control can be easily performed. Furthermore, since a reception schedule storage unit for storing the selected reception schedule information is provided, the schedule information can be set and stored at the time of shipment from the user or the factory, so that the setting and change of the selected reception schedule information can be easily performed. Can be done. For this reason, schedule information can be set according to the user's usage status and the type of electronic device, so that optimal schedule control can be performed.
[0037]
Further, in the present invention, when the predicted correction amount calculated by the correction amount calculation unit is greater than or equal to the correction amount determination value, the internal time correction control unit may correct the internal time using the predicted correction amount. preferable.
With such a configuration, the time is corrected only when the predicted correction amount is large, so the predicted correction amount is small as less than the correction amount determination value, and when there is no indication error, not only radio wave reception, Since the time adjustment process is not performed, power consumption can be further reduced.
[0038]
Here, in the present invention, it is preferable that the plurality of reception time data and the difference amount data stored in the reception information storage unit are data of the latest predetermined number of times among a plurality of data received in the past. .
With such a configuration, for example, when a reception schedule or a predicted correction amount is set using reception time data and difference amount data of the past seven times, if a new reception is performed, the past including the latest data is set. Since the average value of the time correction values and the predicted correction amount are calculated based on the seven data, they can be calculated based on recent trends, and their accuracy can be improved.
It should be noted that if the data is a predetermined number of times in the past, the data does not necessarily have to be the data received continuously. That is, there may be a case where the radio wave cannot be received due to the influence of electromagnetic noise or the like, and the data may be received a predetermined number of times including before and after the number of times and the data may be stored.
[0039]
Here, in the present invention, it is preferable to have a setting change unit that changes the setting of at least one of the set values and the determination values.
If such a setting change unit is provided, the user can freely change and set each set value and judgment value used at each judgment according to his / her own use situation, external environment, etc. Control can be performed.
[0040]
In the present invention, it is preferable that the electronic device is a radio-controlled timepiece including a display unit that displays an internal time measured by the internal time counting unit.
In this case, the display unit corrects the display time as the internal time correction control unit corrects the internal time using the predicted correction amount.
When the electronic device of the present invention is applied to a radio-controlled timepiece, power consumption can be reduced, the life thereof can be extended even when the battery is driven, the accuracy of the displayed time can be increased, and the error can be improved. It can be a watch with few.
[0041]
A reception control method for an electronic device according to the present invention is a method for receiving an electronic device, comprising: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A control method, wherein a time data comparing step of comparing external time data that is time information received by the external wireless information receiving unit and internal time data measured by the internal time counting unit and outputting a difference amount thereof; A receiving information storing step of storing at least a plurality of times of receiving the external wireless information by the external wireless information receiving unit and the data of the difference amount at that time; and receiving the plurality of reception time data, the difference amount data, and the last reception. A correction amount calculation step of calculating a predicted correction amount by an elapsed time from time, and an internal time correction control step of correcting an internal time using the predicted correction amount, Characterized in that it comprises a.
[0042]
In the present invention, when the external wireless information is received by the external wireless information receiving unit, the received time information is compared with the internal time data measured based on the reference clock generated inside the electronic device in the time data comparing step. The difference is output by comparison, and each data of the difference and the reception time is stored in the reception information storage step. Further, in the correction amount calculating step, a predicted correction amount is calculated based on past received data, that is, based on respective data such as a plurality of reception times in the past, a difference amount, an elapsed time, and the like. Correct the internal time with the corrected value.
For this reason, for example, even when the user wants to correct the time without receiving external wireless information at any time, the internal time can be corrected based on the predicted correction amount, and the occurrence of a large time shift can be prevented. Can be suppressed.
[0043]
A reception control method for an electronic device according to the present invention is a method for receiving an electronic device, comprising: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A control method, wherein a time data comparing step of comparing external time data that is time information received by the external wireless information receiving unit and internal time data measured by the internal time counting unit and outputting a difference amount thereof; A receiving information storing step of storing at least a plurality of times of receiving the external wireless information by the external wireless information receiving unit and the data of the difference amount at that time; and receiving the plurality of reception time data, the difference amount data, and the last reception. A correction amount calculating step of calculating a predicted correction amount based on an elapsed time from time, and obtaining time information by receiving external wireless information in the external wireless information receiving unit If it fails, it characterized in that it comprises an internal time correction control step of correcting the internal time by using the predicted correction amount.
According to the present invention, even when time information based on external wireless information cannot be acquired, such as when reception of external wireless information has failed, the internal time can be corrected based on the estimated correction amount, Can be suppressed from occurring.
[0044]
A reception control method for an electronic device according to the present invention is a method for receiving an electronic device, comprising: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A control method, wherein a time data comparing step of comparing external time data that is time information received by the external wireless information receiving unit and internal time data measured by the internal time counting unit and outputting a difference amount thereof; A receiving information storing step of storing at least a plurality of times of receiving the external wireless information by the external wireless information receiving unit and the data of the difference amount at that time; and receiving the plurality of reception time data, the difference amount data, and the last reception. A correction amount calculating step of calculating a predicted correction amount based on an elapsed time from time, a magnetic field detecting step of detecting electromagnetic noise, and an electromagnetic noise detecting step in the magnetic field detecting step. When detecting the reception control step of disabling the reception operation or invalidating the reception data in the external wireless information receiving unit, and when the reception operation is prohibited or the reception data is invalidated in the reception control step, An internal time correction control step of correcting the internal time using the predicted correction amount.
According to the present invention, even if electromagnetic noise is detected and reception of external wireless information is prohibited or received data is invalidated, the internal time can be corrected based on the predicted correction amount, Can be suppressed from occurring.
[0045]
A reception control method for an electronic device according to the present invention is a method for receiving an electronic device, comprising: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A control method, wherein a time data comparing step of comparing external time data that is time information received by the external wireless information receiving unit and internal time data measured by the internal time counting unit and outputting a difference amount thereof; A receiving information storing step of storing at least a plurality of times of each of the time when the external wireless information is received by the external wireless information receiving unit and the difference amount at that time, and the plurality of receptions stored in the receiving information storing unit; A schedule control step of controlling a reception schedule in the external wireless information receiving unit based on time data and difference amount data. And butterflies.
[0046]
Here, the reception control method includes: a correction amount calculating step of calculating a predicted correction amount based on the plurality of reception time data, the difference amount data and an elapsed time from the previous reception; and an internal time using the predicted correction amount. And an internal time adjustment control step of adjusting the time.
[0047]
In each of these reception control methods, the same functions and effects as those of the invention of the electronic device, such as the functions and effects described above, can be obtained.
[0048]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 shows a circuit configuration of a radio-controlled timepiece 1 according to the first embodiment.
The radio-controlled timepiece 1 serves as an antenna 21 for receiving a long-wave standard radio wave (external radio information) on which time information is superimposed, and a receiving means for processing the long-wave standard radio wave received by the antenna 21 and outputting it as time information (time code). Receiving circuit 22, a data storage circuit 23 for storing the time information output from the receiving circuit 22, a control circuit 24, a display driving circuit 25 for controlling the driving of a display unit 28 for displaying the time, and a display unit 28 Hand position detecting circuit 26 for detecting the hand position of the hands, a battery 27 as a power source for driving each circuit, hands such as hour hand, minute hand, and second hand, and a display unit 28 constituted by a motor for driving the hands and the like. It is comprised including.
[0049]
The antenna 21 is constituted by a ferrite antenna or the like in which a coil is wound around a ferrite rod.
The receiving circuit 22 includes an amplifying circuit, a band-pass filter, a demodulating circuit, a decoding circuit, and the like (not shown), extracts time information (time code) composed of digital data from a received radio wave, and stores the time information in the data storage circuit 23.
Therefore, the antenna 21, the receiving circuit 22, and the data storage circuit 23 constitute an external wireless information receiving unit.
[0050]
The time information stored in the data storage circuit 23 is processed by the control circuit 24. The configuration of the control circuit 24 is shown in FIG.
The control circuit 24 includes an oscillation circuit 51, a frequency division circuit 52, a time counter 53, a comparison circuit 54, a reception control unit 60, and a storage unit 70.
The reception control unit 60 includes an internal time correction control unit 61, a correction amount calculation unit 62, and a reception schedule control unit 63.
The storage unit 70 includes a reception information storage unit 71, a reception schedule storage unit 72, and a setting value storage unit 73.
[0051]
The oscillation circuit 51 oscillates a reference oscillation source 50 such as a crystal oscillator at a high frequency, and the frequency dividing circuit 52 divides the frequency of the oscillation signal and outputs it as a predetermined reference signal (for example, a 1 Hz signal). The time counter 53 counts the reference signal and counts the current time. Therefore, an internal time counting unit that counts the internal time by these circuits 51 and 52 and the counter 53 is configured. Then, every time the time counter 53 counts up by one, a drive signal is output to the display drive circuit 25 to drive the display unit 28 composed of a pointer and a stepping motor.
The position of the pointer is detected by the hand position detection circuit 26 and output to the comparison circuit 54.
[0052]
The comparison circuit 54 determines whether the time information (external time data) stored in the data storage circuit 23 is correct time data, and if the time information is correct, the hand position of the hand position detection circuit 26, that is, the internal time It is configured to output an amount of difference from time data (current time data). Therefore, the comparison circuit 54 constitutes a time data comparison unit.
Various methods used in conventional radio-controlled timepieces can be used to determine whether the received time information is accurate. For example, whether the time or date of non-existence such as 68 minutes is not reached, and whether each time data represents the expected time, that is, if the time data is continuously received, Is predicted to be time data of every minute. Therefore, a method of confirming whether or not each data has accurate time data based on whether or not each data has such time can be adopted.
In the present embodiment, the hand position data of the hand position detection circuit 26 is used as the internal time data, but the output data of the time counter 53 may be used. In this case, the output of the time counter 53 may be input not only to the display drive circuit 25 but also to the comparison circuit 54. When such a configuration is adopted, the needle position detection circuit 26 does not necessarily have to be provided.
[0053]
The internal time correction control unit 61 corrects the value of the time counter 53 based on the difference amount output from the comparison circuit 54, and corrects the time display on the display unit 28 via the display drive circuit 25. The internal time adjustment control unit 61 further stores in the reception information storage unit 71 the data of the difference amount and the time of the time adjustment, that is, the time at which the external wireless information was received.
As shown in FIG. 3, the reception information storage unit 71 stores the data of the reception time and the difference amount retroactively from the latest reception time to the past seven times. Further, a time correction value (second / day) calculated by the difference amount (second) / the reception interval (day) is also calculated and stored. In FIG. 3, the data of the date “2002/4/3” is not described, but this is because the difference amount of the previous day “2002/4/3” is small. The reception is skipped, and as a result, no data exists.
[0054]
The correction amount calculation unit 62 calculates a predicted correction amount using a plurality of data stored in the reception information storage unit 71. For example, a regression equation such as a regression line is obtained from the data of the seven time correction values by the least squares method or the like, and a predicted correction amount after a predetermined elapsed time from the latest reception time, for example, one day later, is calculated based on the regression equation. ing.
[0055]
The reception schedule control unit 63 is configured to select and change the reception processing schedule in the reception circuit 22 from each schedule information stored in the reception schedule storage unit 72.
That is, in the present embodiment, as shown in FIG. 4, five types of reception schedule information of schedule information A to E are registered in the reception schedule storage unit 72. Then, the reception schedule control unit 63 selects appropriate reception schedule information A to E based on the data stored in the reception information storage unit 71, and controls the operation of the reception circuit 22 based on the information A to E. .
[0056]
In the present embodiment, the reception schedule control unit 63, based on the average value of the time correction values stored in the reception information storage unit 71 and the variation of the time correction values (deviation from the regression equation), as described later, Each of the reception schedule information AE is selected.
[0057]
The change of the schedule in the reception schedule control unit 63 is also notified to the correction amount calculation unit 62, and the correction amount calculation unit 62 instructs the internal time correction control unit 61 to adjust the time according to the reception schedule and the estimated correction amount. It is configured as follows. Specifically, when the reception schedules B to D are selected and the reception once a day is skipped, and the radio wave reception is not performed at 2:00 am, which is the original reception timing, the prediction at that time is performed. The correction amount is calculated, and if the correction amount is equal to or more than the correction amount determination value, for example, 0.2 seconds or more, time correction is performed using the predicted correction amount. On the other hand, if the correction amount is less than the correction amount determination value, the time is not corrected.
[0058]
Also, when the user operates the external operation unit 29 such as a crown or a button to instruct forced reception, the reception schedule control unit 63 immediately activates the reception circuit 22 and operates the external wireless communication regardless of the reception schedule. Performs information reception processing.
[0059]
The set value storage unit 73 stores each set value (the first and second set values for the average value and the first and second set values for the variation) used for the determination by the reception schedule control unit 63 and the correction amount calculation unit 62 The correction amount determination value to be used is stored.
[0060]
The operation of the radio-controlled timepiece 1 having such a configuration will be described with reference to the flowcharts of FIGS.
Normally, the control circuit 24 counts a reference clock of 1 Hz or the like output via the oscillation circuit 51 and the frequency dividing circuit 52 by the time counter 53 to measure the current time. Then, as the counter value of the time counter 53 changes, a drive pulse is output from the display drive circuit 25 to the stepping motor of the display unit 28, and each hand is operated.
[0061]
On the other hand, when the operation is started, the reception control unit 60 first sets a variable N1 indicating the number of receptions to an initial value 0, and sets a variable N2 indicating the selected reception schedule to an initial value 0 (Step 1, hereinafter, the steps are referred to as "1"). S ”). Further, the reception schedule control unit 63 selects the reception schedule information A of the initial set value from the reception schedule information A to E stored in the reception schedule storage unit 72, and executes the schedule for receiving radio waves once a day. Control (S2).
[0062]
Subsequently, the reception schedule control unit 63 determines whether there is an instruction for forced reception by the external operation unit 29 (S3A). If there is no instruction for forced reception, it is determined whether the reception time has been reached (S3B). Then, when there is an instruction for forced reception (S3A) or when the reception time has come (S3B), the reception schedule control unit 63 drives the reception circuit 22 to perform the radio wave reception processing (S4).
For example, immediately after the start, the schedule information A (once / one day), which is the initial set value, is set, so that the current time detected by the hand position detection circuit 26 is set, for example, every morning. At 2:00, the reception schedule control unit 63 drives the reception circuit 22 to perform a radio wave reception process (S4).
[0063]
When the receiving circuit 22 is operated, the standard radio wave is received by the antenna 21, and time data (time information) is stored in the data storage circuit 23 via the receiving circuit 22. When the reception schedule control unit 63 activates the reception circuit 22 for about three minutes and receives the time information for three frames, the reception circuit 22 stops.
Then, the comparison circuit 54 checks whether the time information stored in the data storage circuit 23 is accurate time data, and determines whether the reception was successful (S5).
[0064]
If the reception is determined to be successful in S5, the comparison circuit 54 calculates the difference between the received time information and the current time detected by the hand position detection circuit 26, and outputs the difference to the internal time correction control unit 61.
The internal time correction control unit 61 corrects the data of the time counter 53 using the difference amount data, and corrects the current time display on the display unit 28 via the display drive circuit 25 (S6).
[0065]
Further, the internal time correction control unit 61 stores the difference amount, that is, the time correction amount data, and the reception time, that is, the correction time data, in the reception information storage unit 71 (S7).
Then, since the first reception is performed, the reception control unit 60 adds 1 to the number of receptions N1 (S8), and determines whether or not the number of receptions N1 is a predetermined number of times, in this embodiment, 7 or more. (S9).
[0066]
If N1 is less than 7 times in S9, or if the comparison circuit 54 determines in S5 that the reception has failed, whether there is forced reception (S3A), or wait until the reception time is reached (S3B), and force reception Are instructed, or when the time comes for reception, the above-described processes S4 to S9 are repeated.
On the other hand, when it is determined in S9 that the number of receptions N1 is 7 or more, the reception control unit 60 causes the reception schedule control unit 63 to execute a process of changing the reception schedule (S10), and further, the correction amount calculation unit 62 A time correction process is performed with the predicted correction amount (S11).
Then, the processes in S3A and S3B and thereafter are repeated based on the changed reception schedule.
[0067]
In the present embodiment, the setting is made such that each processing of S10 and S11 is executed after N1 has been received seven times or more, that is, seven times from the start in S9. The number of times is not limited to three, but may be set appropriately, such as three times, five times, or ten times.
Further, in the present embodiment, after receiving eight times from the start, N1 is always 7 or more, so that each process of S10 and S11 is executed each time the reception is successful. A condition may be set such that processing is performed every other time, instead of performing the processing.
[0068]
Further, the number of data stored in the reception information storage unit 71 is determined by storing all data successfully received from the start time, and using the latest seven data among them to calculate the average value of the time correction value and the like. However, from the viewpoint of storage capacity, only seven data may be stored at all times, and when new data is stored, the oldest data may be deleted. Therefore, the average value of the time correction value is an average value based on the time correction value when reception is successfully completed, and does not include the predicted correction value.
[0069]
The reception schedule change processing will be described with reference to the flowchart in FIG.
In the reception schedule change process (S10), the reception schedule control unit 63 first calculates the average value of the time correction values as shown in FIG. 6 (S21). Further, a variation of the time correction value is calculated (S22). The “variation” of the time correction value indicates a degree of deviation of each time correction value from the regression equation of the time correction value, and is represented by, for example, a standard deviation in deviation of each time correction value from the regression equation. be able to.
[0070]
Next, the reception schedule control unit 63 determines whether the average value is equal to or less than the first average value setting value A1 based on the line of 0 seconds / day stored in the setting value storage unit 73 (S23). ). The first set value A1 for the average value is appropriately set in implementation, and is set to, for example, 0.25 seconds / day. If the received data has a time correction value as shown in FIG. 9 (1), the average value of the time correction values for the seven days in which the reception and correction have been performed for the first to seventh days is about 0.21. Since it is seconds / day, which is equal to or less than the first set value A1 for the average value, it is determined as Yes in S23, and the reception interval extension process (S30) is executed. Therefore, neither reception nor correction is performed on the eighth day.
Here, in the graph of FIG. 9, a mark “●” indicates a correction amount obtained by comparing the reception time and the internal time on each day when reception and correction are performed. An “x” mark indicates that neither reception nor modification was performed. Specifically, this is a case where the average value of the correction amount (time correction value) for the past seven days is equal to or less than the first average value setting value A1. In FIG. 9A, the mark “x” is on the line of 0.2 second / day, which is shown on a regression line 100 described later for convenience of the graph notation. Not shown.
Further, a mark “△” indicates a predicted correction amount when correction is performed with the predicted correction amount without receiving. More specifically, this is a case where the average value of the correction amount in the past seven days in which the reception and the correction have been performed exceed the first set value A1 for the average value.
[0071]
Further, if No is determined in S23, the reception schedule control unit 63 determines whether the variation of the time correction value is equal to or less than the “variation first set value B1” stored in the set value storage unit 73 ( S24). Even if the average value of the correction amount (time correction value) is larger than the first set value A1 for average value, if the variation is smaller than the first set value B1 for variation, that is, each time correction value is substantially constant. The trend is indicated, and if the regression equation (regression line etc.) is almost along, the time can be adjusted with the predicted correction amount described later without performing the radio wave reception, so that the radio wave reception interval is extended. This is because you can do it.
[0072]
Therefore, for example, as shown in FIG. 9B, when the regression line 100 of each time correction value rises at a constant rate, the average value of the time correction values is larger than the first set value A1 for the average value. Although it becomes larger, each time correction value falls within the range B centered on the regression line, and its variation is equal to or less than the first variation setting value B1, so that the reception interval extension processing (S30) is performed.
The range B shown in FIGS. 9A and 9B represents the range of the first set value for variation. Here, the regression line 100 almost coincides with the scale line of 0.2 seconds / day in FIG. 9A, and is indicated by a dashed line in FIG. 9B. Note that the regression line 100 shown in FIG. 9A is a regression line as of the 16th day, that is, each of the 7th day when the reception and the correction on the 4,5,6,7,9,12,16 days were performed. It shows the regression line of the time correction value. Similarly, a regression line 100 shown in FIG. 9 (2) represents a regression line of each time correction value for the seven days in which reception and correction were performed on the third to seventh, ninth, and twelfth days. Further, since the variation is represented by a range centered on the regression line 100, the range B is a range from (the regression line 100 + the first setting value B1 for the variation) to (the regression line 100−the first setting value B1 for the variation). Is represented.
For example, in FIG. 9A, the lower limit of the range B is 0.1 second / day, the upper limit is 0.3 second / day, and the size of the range B is “0.3−0.1 = 0.2 seconds / day ". Then, the first set value for variation B1 = B / 2 = 0.1 second / day.
[0073]
On the other hand, if No is determined in S24, the reception schedule control unit 63 determines whether or not the average value of the time correction value is equal to or more than the second average value setting value A2 based on the line of 0 seconds / day. (S25). The second set value for the average value may be any value that is larger than the first set value A1 for the average value, and may be appropriately set in implementation. In the present embodiment, for example, in FIG. 9A, the second set value A2 for the average value is set to 0.30 seconds / day or the like.
If it is determined in S25 that the average value of the time correction values is equal to or larger than the second set value A2 for the average value, the reception schedule control unit 63 executes a reception interval shortening process (S27). Specifically, the reception schedule control unit 63 selects the reception schedule information E from the reception schedule storage unit 72 (S27), and the subsequent reception is performed every half day. Then, the variable N2 indicating the type of schedule information when the reception interval is extended is returned to the initial value "0" because the reception interval is shortened (S28).
[0074]
If No is determined in S25, that is, if the correction amount is larger than the first set value A1 for the average value and equal to or smaller than the second set value A2 for the average value, the reception schedule control unit 63 sets the time correction. It is determined whether the value variation is equal to or greater than the variation second setting value B2 (a range centered on the regression line 100 as in the case of the variation first setting value B1) (S26). Even when the variation is as large as the second set value B2 or more, the process of shortening the reception interval (S27) is executed.
If No is determined in S26, that is, if the average value is between the first and second set values for the average value and the variation is between the first and second set values for the variation, the reception schedule control unit The step 63 changes the schedule information to the default schedule information A (once / one day) (S29), and sets N2 = 0 in step S28.
[0075]
The second set value for variation B2 may be any value as long as it is equal to or greater than the first set value for variation B1, and may be set as appropriate in implementation, and is set to, for example, 0.15 seconds / day. When the second setting value for variation B2 is the same as the first setting value B1, if the variation of the time correction value exceeds the range B, for example, the reception interval is shortened immediately. On the other hand, if the second set value for variation B2 is larger than the first set value B1, even if the variation of the time correction value exceeds the range B, it only returns to the initial schedule information A. Only when it exceeds, the schedule information E is selected and the reception interval is shortened. For example, as shown on the 16th day in FIG. 9A, when the average value of the time correction values exceeds the first average value A1, the second average value A2, and the range B, the schedule Information E is selected, the reception interval is shortened, and reception and time correction are performed on day 16.5. Thereafter, reception and time adjustment are performed every 0.5 days. However, when the time adjustment amounts for the past seven days are all within the range B, for example, the reception interval is widened and the operation returns to daily reception again. .
[0076]
Next, the reception interval extension processing (S30) will be described based on the flowchart of FIG.
In the reception interval extension process (S30), the reception schedule control unit 63 first determines whether N2 is "0" (S31). When the reception interval extension processing (S30) is executed first, N2 = 0, so that the reception schedule information B is selected (S32), and N2 is updated to "1" (S33). Therefore, the subsequent reception time is once every two days. Specifically, the reception processing is set to be performed at the same time two days after the date and time of the previous reception.
[0077]
Further, when the reception interval extension processing (S30) is executed in a state where the reception schedule information B is currently selected, since N2 = 1, the reception schedule control unit 63 determines No in S31, and furthermore, , N2 = 1 (S34). Here, since the result is Yes, the reception schedule information C is selected (S35), and N2 is updated to "2". Therefore, the next reception time is the same time three days later.
[0078]
Further, when the reception interval extension processing (S30) is executed in a state where the reception schedule information C is currently selected, since N2 = 2, the reception schedule control unit 63 determines No in S31 and S34, respectively. Then, the reception schedule information D is selected (S37). N2 remains "2" and is not changed. Therefore, the next reception time is the same time four days later.
In the present embodiment, since the schedule information D is set only once at most every four days, the reception interval extension process (S30) is executed in a state where the reception schedule information D is currently selected. Also, the process of S37 is performed, and the process is performed with the reception schedule information D as it is. In the reception interval extension process, the extension process of the reception interval longer than the schedule information D can be repeated. However, as in the present embodiment, it is preferable to keep the distance up to a certain interval. For example, if radio wave reception is not performed for a long period of 1 to 6 months, correct time data cannot be obtained, and correct time cannot be displayed.
[0079]
As described above, when the reception schedule change processing (S10) ends, the time correction processing (S11) with the predicted correction amount is subsequently performed.
In the time correction process, the correction amount calculation unit 62 first determines whether N2 is greater than 0 as shown in the flowchart of FIG. 8 (S41). The time correction by the predicted correction amount is performed only when the reception interval is extended from the default schedule once a day and radio wave reception is skipped. Therefore, it is executed only in the case of the reception schedule information BD, that is, only in the case of N2 = 1, 2. Therefore, if N2 = 0, the time adjustment process ends without performing anything.
[0080]
On the other hand, when it is determined as Yes in S41, the correction amount calculating unit 62 calculates the predicted correction amount at the date and time when the next reception is to be skipped (S42). Specifically, the prediction correction amount may be calculated by applying the skip date and time to the regression equation.
If the predicted correction amount is larger than the correction amount determination value, the correction amount calculation unit 62 corrects the time with the predicted correction amount when the skipped reception process is scheduled (S44).
On the other hand, when the predicted correction amount is smaller than the determination value, the instruction error is predicted to be small without performing the time correction, so that the reception schedule control unit 63 and the correction amount calculation unit 62 perform the radio wave reception and the time correction. Are not executed (S45).
[0081]
Then, the correction amount calculation unit 62 determines whether or not the next reception time has come (S46), and if the reception time has not come, repeats the above processing S42 to S45. In other words, when the reception schedule information C or D is selected, the reception date and time is skipped twice or three times before the next reception. Therefore, the correction amount calculation unit 62 calculates the predicted correction amount at each skip, and appropriately executes the time correction based on the calculated value.
On the other hand, if it is determined in S46 that the reception time has come, the correction amount calculation unit 62 ends the time correction processing S11 and repeats the processing from S3A.
[0082]
According to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, when the radio wave cannot be received or correct data cannot be received due to the influence of noise or the like and correct time information cannot be obtained, the correction amount calculating unit 62 calculates the predicted correction amount. Since the internal time is corrected using the predicted correction amount, even when the time cannot be corrected by the external wireless information, the time indication error can be suppressed to be small, and an electronic device with high time indication accuracy can be provided. Can be.
Furthermore, even when the radio wave reception interval becomes large due to a change in the reception schedule or the like, the time correction can be appropriately performed using the predicted correction amount, so that the pointing error can be reduced. Therefore, it is possible to simultaneously achieve a technical effect in which it is difficult to achieve both a reduction in power consumption and an improvement in time instruction accuracy.
[0083]
(2) Further, the correction amount calculation unit 62 corrects the time only when the predicted correction amount is equal to or larger than the determination value, and does not perform the time correction when the predicted correction amount is equal to or smaller than the determination value. Power consumption can be further reduced.
[0084]
(3) The reception schedule control unit 63 changes and controls the subsequent reception schedule based on the reception time data and the difference amount data obtained by a plurality of reception processes. Compared with the case where the reception interval is changed, the schedule can be set based on more accurate reception information, the possibility of occurrence of an error can be reduced, and the deviation of the time data output to the display unit 28 or the like, that is, the indication error can be reduced. Can be minimized.
In addition, since the reception schedule can be changed to increase the reception interval, power consumption can be reduced. Therefore, when a portable electronic device such as a wristwatch is driven by a battery, the battery life can be extended. Accordingly, an electronic device having a process of consuming a large amount of power, which is a receiving operation, can have a longer duration than in the past.
[0085]
(4) Further, in the present embodiment, the reception schedule control unit 63 converts the reception schedule information from the initial once / day information A to the once / two-day reception schedule information B, and once / third day. Since the receiving schedule information C and the once / fourth day receiving schedule information D are sequentially selected to gradually lengthen the receiving interval, power consumption can be further suppressed. In addition, these reception intervals are extended when the average value of the time correction value is equal to or less than the first set value for the average value, or when the variation of the time correction value is equal to or less than the first set value for the variation and the variation is small. Therefore, there is almost no error in the time designation even if the radio wave reception interval is extended.
[0086]
(5) In addition, when the reception schedule is changed, not only the determination based on the average of the time correction values but also the variation in the time correction values, the determination is made based on only the average value of the time correction values. In comparison, the number of cases where the reception interval can be extended increases, and the power consumption can be further reduced. That is, when the determination is made based on only the average value of the time correction values, if the average value is higher than the first set value, the radio wave reception interval cannot be lengthened. On the other hand, in the present embodiment, if the average value of the time correction value is high and the variation is small, the radio wave reception interval is lengthened, so that the power consumption of the radio-controlled timepiece 1 can be further reduced.
[0087]
(6) Further, the reception schedule control unit 63 performs not only the process of extending the reception interval, but also the case where the variation of the time correction value is larger than the second setting value for variation or the average value of the time correction value is If the value is larger than the second set value, processing for shortening the reception interval is also performed, so that optimal radio wave reception control according to the situation can be performed, and time correction by radio wave reception can be reliably performed. Thus, the accuracy of the time indication can be improved.
[0088]
(7) Since the external operation unit 29 is provided so that forced reception can be performed, even when the reception schedule control unit 63 sets the reception schedule interval long, the user can perform radio wave reception at free timing. . Therefore, even if an error occurs in the time indication due to a long reception interval, the user can immediately correct the error by forcibly receiving the signal as necessary, and there is no problem with actual use. And never.
[0089]
(8) Since the reception schedule storage unit 72 and the setting value storage unit 73 are provided, it is possible to easily change or add each reception schedule information, setting value, and determination value. For this reason, such information can be easily set at the time of a user or factory shipment according to each model and use situation, and optimal control can be performed for each use model and each model.
[0090]
[Second embodiment]
A second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same or similar components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0091]
The radio-controlled timepiece 1 of the second embodiment differs from the configuration of the first embodiment only in that a magnetic field detection unit 81 and a reception processing control unit 82 are added, as shown in FIG. Is the same as in the first embodiment.
The magnetic field detection unit 81 detects electromagnetic noise using the antenna 21, the receiving circuit 22, and the like. Examples of the electromagnetic noise include an external magnetic field applied from an external device such as an AC magnetic field and a high-frequency magnetic field, and an internal magnetic field generated by the operation of a generator disposed inside the device.
The magnetic field detecting unit is not limited to the one using the antenna 21 and the receiving circuit 22, but may be any one that can detect electromagnetic noise. For example, an electromagnetic noise may be detected by using a drive coil of a stepping motor in the display unit 28 as an antenna and using the drive circuit as a magnetic field detection circuit. When an AC generator is built in, a magnetic field may be detected by a magnetic field detection circuit using the power generation coil as an antenna, or a power generation state is detected from power generated by the power generation coil. A device that detects electromagnetic noise by using the power generation detection circuit as a magnetic field detection circuit may be used.
[0092]
When the magnetic field detection unit 81 detects electromagnetic noise of a predetermined intensity, the reception process control unit 82 does not perform the reception process in the reception schedule control unit 63 even if it is time to perform radio wave reception on a schedule. Is controlled as follows.
[0093]
In the second embodiment, the control is performed as shown in FIGS. That is, as shown in FIG. 11, when the reception schedule control unit 63 determines that forced reception has been performed (S3A) or when it is determined that the reception time has been reached (S3B), the reception process (S4) is immediately performed. Instead, the presence / absence of magnetic field detection by the magnetic field detection unit 81 is determined by the reception processing control unit 82, and the reception schedule control unit 63 is notified (S51). Here, if no magnetic field is detected, the reception schedule control unit 63 executes the same processing as in the first embodiment after the reception processing (S4).
On the other hand, when the magnetic field is detected in S51, the reception schedule control unit 63 determines whether the reception has already been performed seven times (S52). If the number of receptions is less than 7, the calculation accuracy of the predicted correction amount is reduced. Therefore, the process returns to the next reception timing determination processing without performing any processing (S3).
[0094]
If it is determined in S52 that the information has been received seven times or more, the information is notified from the reception schedule control unit 63 to the correction amount calculation unit 62, and the correction amount calculation unit 62 corrects the time with the predicted processing amount (S53). ).
The time adjustment process of the present embodiment is executed when electromagnetic noise is detected at the time of receiving radio waves. Therefore, when compared with the process flow of FIG. The only difference is that the process of determining the reception time is omitted, and the other processes are the same, and thus the description is omitted.
[0095]
In this embodiment, all the effects of the first embodiment can be obtained, and the following effects can be obtained.
(9) Since the magnetic field detection unit 81 and the reception processing control unit 82 are provided, the execution of the radio wave reception processing can be stopped when the electromagnetic noise is affecting the radio wave reception. Therefore, the standard radio wave is not erroneously received due to the influence of the electromagnetic noise and is not corrected at a wrong time, and the time can be corrected based on the radio wave information only when an accurate radio wave is received. Therefore, the time accuracy can be further improved.
[0096]
(10) Further, even when the radio wave cannot be received due to the electromagnetic noise, the time correction processing based on the predicted correction amount is executed, so that the occurrence of the pointing error can be suppressed. In particular, when radio waves cannot be received due to electromagnetic noise, radio waves need to be newly received one hour later or the like. However, in the present embodiment, time correction processing is performed using a predicted correction amount. There is no need to perform radio wave reception, and power consumption can be further reduced accordingly.
[0097]
[Third embodiment]
A third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same or similar components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.
[0098]
As shown in FIG. 13, the radio-controlled timepiece 1 of the third embodiment has, in addition to the configuration of the first embodiment, for example, a user of the radio-controlled timepiece 1 in a building or a subway, or a transmission station side. The only difference is that when radio wave reception fails due to a natural phenomenon such as a trouble or a magnetic storm, information that the radio wave reception has failed is sent from the comparison circuit 54 to the correction amount calculation unit 62. This is the same as the embodiment.
That is, the comparison circuit 54 determines whether or not the correct time information has been received, and notifies the correction amount calculation unit 62 of the determination information.
[0099]
In the third embodiment, the control is performed as shown in FIG. That is, as shown in FIG. 14, when the reception schedule control unit 63 determines that forced reception has been performed (S3A) or that it has reached the reception time (S3B), the reception process (S4) is performed.
Then, the comparison circuit 54 determines whether or not the reception has been successful (S5). Here, when it is determined that the reception is successful, the same processing as that of the first embodiment is executed thereafter.
On the other hand, when it is determined that the reception has failed in S5, the correction amount calculation unit 62 determines whether the reception has already been performed seven times (S52). If the number of times of reception is less than 7, the calculation accuracy of the predicted correction amount decreases, so that the process returns to the determination process of the presence or absence of forced reception without performing any processing (S3A).
[0100]
When it is determined in S52 that the received data has been received seven times or more, the correction amount calculation unit 62 executes a time correction process (S53) using the predicted processing amount.
The time adjustment processing of the present embodiment is the same as the processing flow shown in FIG. 12 of the second embodiment, and a description thereof will be omitted.
[0101]
In this embodiment, all the effects of the first embodiment can be obtained, and the following effects can be obtained.
(11) When the comparison circuit 54 determines that the reception has failed, the information is notified to the correction amount calculation unit 62, and the correction amount calculation unit 62 executes the time correction processing based on the predicted correction amount. , The occurrence of the pointing error can be suppressed. Therefore, for example, radio waves could be received because electromagnetic noise such as an external magnetic field affected radio waves, but correct time information could not be obtained, or standard radio waves could be received because they were in a building or subway. Even if the time information cannot be obtained, the time can be corrected using the predicted correction amount, so that the time indication does not largely deviate and the almost accurate time is always obtained regardless of the external situation. Can be instructed.
Further, similarly to the second embodiment, when radio wave reception cannot be performed, it is not necessary to perform radio wave reception again, and power consumption can be further reduced.
[0102]
It should be noted that the present invention is not limited only to the above-described embodiments, and it goes without saying that various changes can be made without departing from the spirit of the present invention.
For example, in the first embodiment, in the flowchart of FIG. 5, when the radio wave reception fails in S5, the control is performed so as to wait for the next reception time. However, similarly to the third embodiment, the radio wave reception is performed. May fail, the time correction process may be performed with the predicted correction amount. In this way, the time can be corrected with the predicted correction amount, for example, when the radio wave cannot be received because the radio wave cannot be received because the radio wave reception happens to be in a place such as a building, a subway, or an underground passage, which happens to occur at the time of reception. It is possible to prevent a large time deviation.
[0103]
In the embodiment, as shown in the flowchart of FIG. 6, when the average value of the time correction value is equal to or less than the first set value for the average value, or when the variation of the time correction value is equal to or less than the first set value for the variation. In the case of, the reception schedule is changed so that the reception interval is longer than the initial setting value, but the average value of the time correction value is less than or equal to the first setting value for the average value, and Only when the variation is equal to or less than the first variation setting value, the reception schedule may be changed so that the reception interval is longer than the initial setting value. In this way, the reception interval is extended only when both conditions are satisfied, so that the variation of the time correction value is small and the reception interval is extended only when the time is stable, and the time indication error is reduced. The size can be reduced more reliably.
[0104]
Further, in the above embodiment, as shown in the flowchart of FIG. 6, when the average value of the time correction value is equal to or more than the second set value for average value, or when the variation of the time correction value is equal to or more than the second set value for variation. In the case of, the reception schedule is changed so that the reception interval is shorter than the initial setting value, but the average value of the time correction value is equal to or more than the second setting value for the average value, and Only when the variation is equal to or greater than the second setting value for variation, the reception schedule may be changed so that the reception interval is shorter than the initial setting value. With this configuration, the reception interval is shortened only when both conditions are satisfied. Therefore, priority is given to suppressing an increase in power consumption due to the reception process, rather than shortening the reception interval and improving time accuracy. This is effective when a power saving mode or the like is provided.
[0105]
In the second embodiment, when electromagnetic noise is detected, control is performed so as to prohibit reception processing. However, the reception itself is performed, for example, in order to grasp the reception status, but the received data is invalidated. Control may be performed so that time correction based on the data is not performed.
[0106]
In the second and third embodiments, when reception is not performed due to detection of electromagnetic noise or when radio waves cannot be received, only time correction processing is performed, and radio waves are received at the next reception timing. However, control may be performed such that radio wave reception is performed again after a set elapsed time (for example, after one hour). In particular, such control is effective when the current reception schedule information has a short reception interval like the information E, so that it is desirable to execute radio wave reception if possible. On the other hand, when the reception interval is originally long as in the reception schedule information such as information B to D, there is not much problem even if the radio wave reception schedule is skipped once. Control is suitable.
If the electromagnetic noise is detected even at the time of receiving again, the processing may be performed after a lapse of the set time.
[0107]
In each of the above embodiments, the received data of the past seven times may not be continuous, and is controlled based on the data of the past seven times simply received. However, the received data is continuously received based on the reception schedule. It may be made to process by the thing.
[0108]
Further, in the above-described embodiment, the schedule change processing and the like are executed after receiving the radio wave seven times. However, as shown in FIG. Processing or the like may be executed. In short, it is only necessary to use the reception time data and the difference amount data obtained by receiving the radio wave at least a plurality of times.
Further, the number of data for obtaining the average value of the time correction values and the like may be varied by the time correction values and the like. For example, as shown in FIG. 15 (3), when the time correction value is constant at 0.1 second / day, the timekeeping process of the clock is considered to be stable, so that it is as small as about three times. The information required for the change control of the reception schedule and the like can be obtained by the number of times. Therefore, if the time correction values are the same, the schedule change process may be performed three times, and if the time correction values are not constant, the process may be performed with more data, such as seven times.
[0109]
In the above-described embodiment, the reception interval is changed based on the average value and the variation of the time correction value. However, for example, as shown in FIG. .2 seconds / day) may be used to change the reception interval. Further, as shown in FIG. 15 (4), two allowable ranges A1 and A2 with a reference line of 0 second / day are set. When the range exceeds the range A2, the reception interval is shortened every half day, and thereafter the time When the correction value returns to A1 or less, it may be extended every day. In the example of FIG. 15 (4), the time correction value on the sixth day falls within the range B in terms of variation, but since the value exceeds the range A2, the reception interval is shortened to half a day. I have.
In this case as well, it may be further determined whether the variation of the time correction value is within the set value, for example, whether each time correction value is within the allowable range B (for example, 0.15 seconds / day). Further, the reception interval may be changed only by this variation. In the above-described embodiment, the average value and the variation of the time correction value are used together. However, the determination may be made based on only the average value or only the variation.
[0110]
Further, each set value or determination value may be set only on the + side or only on the − side with reference to 0 seconds / day, or may be set on both sides, and these may be set as appropriate. Further, each set value or determination value may be enlarged or reduced in accordance with the passage of elapsed time.
In addition, each set value and determination value may be changed in consideration of seasonal variation and the like. In particular, since a quartz oscillator or the like has strictly temperature characteristics, if the external air temperature is different between summer and winter, the timekeeping accuracy is slightly different. Therefore, since the time correction value may have a different tendency depending on the season, if each of the set values and the determination value is set in consideration of these, control with higher accuracy can be performed.
[0111]
By operating a setting change unit such as a crown or a button, each of the set values and determination values can be freely set at the time of shipment from a factory or by a user (user), or can be changed from options prepared in advance. You may be able to.
Further, the set values and the determination values and various control programs may be incorporated or changed by wireless communication via the antenna 21 or network communication via a cable.
[0112]
In the above embodiments, the reception schedule change processing and the time correction processing based on the predicted correction amount are performed. However, only the reception schedule change processing may be performed. However, if the time correction process is also used, the error of the time designation is reduced even if the reception interval is increased every three days or every four days, so that the reception interval can be extended and the power consumption can be reduced to 1/3 of the conventional power consumption. , 1/4.
[0113]
Further, the reception schedule information is not limited to the above information A to E, and information having a longer reception interval (such as once / 5 days or once / 10 days) or information having a shorter reception interval (4 times / day). Etc.).
In the above-described embodiment, the schedule information A to D is gradually selected in the order of the information A, B, C, and D. For example, each schedule information A to D is determined by the average value of the time correction values. Information AE may be selected directly. For example, when the schedule information A is selected and the average value of the time correction values is very small, the schedule information D may be directly selected next.
[0114]
Further, in each of the above-described embodiments, the reception schedule storage unit 72 is provided, but the reception schedule control unit 63 may directly calculate and set the reception schedule without providing the reception schedule storage unit 72. For example, a routine may be provided that can calculate the reception interval using the average value of the time correction values as a parameter, and the reception schedule may be set based on the average value.
[0115]
The prediction of the predicted correction amount from the data of the past received / time correction amount may be any as long as the predicted correction amount can be predicted, and cases other than the above embodiments are also included in the present invention.
For example, in each of the above embodiments, the prediction correction amount is updated by sequentially using newly received data. However, as shown in FIG. 16, data of one week (Monday to Sunday) is received as past data. Then, the predicted correction amount for each subsequent day of the week may be calculated and corrected according to the data change during the week. Specifically, first, data for one week may be accumulated, and thereafter, the data of each day of the week may be used as the predicted correction amount for each day. In that case, as shown in FIG. 16, each time correction amount needs to be within the allowable range C set for the average value curve.
It should be noted that the data acquisition may be such that data for one week is acquired every one to several months. However, a manual data acquisition mode for acquiring data for one week from when the user performs the data acquisition instruction operation may be provided.
In addition, data for one to several weeks, not limited to one week, may be accumulated, and the predicted correction amount for each day of the week may be calculated using data for each day of the week.
In such a case, for example, when the difference in the life cycle between a weekday and a holiday when working or going to school affects, etc., it is possible to make a forecast correction taking into account the influence of each day of the week, and the influence of the life cycle , The time can be corrected with high accuracy.
[0116]
In addition, the past data is not limited to one week's data, but as shown in FIG. 17, one year's data is accumulated, the monthly correction amount is calculated, and the data change tendency is grasped. May be calculated and corrected based on a monthly correction amount of past data before the previous year. In particular, when there is a temperature change according to the four seasons, as in Japan, the amount of correction also increases or decreases according to the temperature change. Time can be adjusted.
[0117]
Further, the radio-controlled timepiece 1 is provided with display means for displaying the current reception schedule information and the number of days elapsed since the last reception of the radio wave, so that the user can easily grasp the current state. You may do so. As this display means, for example, switching to the schedule display mode using a crown or a button, and displaying and indicating by indicating the scale of the dial with the second hand in units of 10 seconds as information A to E and indicating the dial, A liquid crystal screen may be provided for display.
Further, the display means such as a liquid crystal screen or an organic EL screen indicates whether the current time is displaying the time corrected by the received radio wave or the time corrected by the predicted correction amount. May be displayed. This display timing may be always displayed, or may be displayed for a fixed time when a crown or a button is operated. Further, the information of the time type is not limited to the screen display, and a special operation may be performed by the time display hands, or may be displayed by a dedicated display hand.
[0118]
Each unit in the control circuit 24 includes, in the timepiece 1, a computer configured with hardware such as various logic elements or the like, or a computer including a CPU (central processing unit) and a memory (storage device). The computer may be configured to incorporate a predetermined program or data (data stored in each storage unit) to realize each unit.
For example, a CPU and a memory are arranged in the radio-controlled timepiece 1 so as to function as a computer, and a predetermined control program and data are stored in the memory in communication means such as the Internet, a CD-ROM, a memory card, or the like. What is necessary is just to install via a medium, operate a CPU etc. by this installed program, and implement each means.
In order to install a predetermined program or the like in the radio-controlled timepiece 1, a memory card, a CD-ROM, or the like may be directly inserted into the radio-controlled timepiece 1, or an apparatus for reading these storage media may be externally provided. May be connected to the radio-controlled timepiece 1. Further, a LAN cable, a telephone line, or the like may be connected to the radio-controlled timepiece 1 to supply and install a program or the like by communication, or since the antenna 21 is provided, a program may be supplied and installed wirelessly. Is also good.
[0119]
If the control program or the like provided by such a recording medium or communication means such as the Internet is incorporated in the radio-controlled timepiece 1, the functions of the inventions described above can be realized only by changing the program. The control program to be executed can be selected and incorporated. In this case, various radio-controlled timepieces 1 having different control formats can be manufactured only by changing the program, so that parts can be used in common and the like, and the manufacturing cost when developing variations can be greatly reduced.
[0120]
The functions of the radio-controlled timepiece, that is, the respective components such as the timekeeping means, the receiving means, and the time correction means are not limited to those of the above-described embodiment, and each means of the conventionally known radio-controlled timepiece can be used.
[0121]
Further, the radio-controlled timepiece 1 of the present invention is not limited to an analog timepiece, but may be a digital timepiece or a timepiece having both an analog display hand and a digital display liquid crystal display unit. Further, the radio-controlled timepiece 1 can be applied to various timepieces such as a portable timepiece such as a wristwatch and a pocket watch, and a stationary timepiece such as a wall clock and a table clock.
Further, the external wireless information is not limited to the time information based on the long-wave standard radio wave. For example, the information may be wireless information using FM, GPS, Bluetooth, or a non-contact IC card, as long as it includes at least time information. Incidentally, it goes without saying that the configuration and the like of the antenna 21 and the receiving circuit 22 are appropriately changed depending on the type of the radio wave.
[0122]
Further, the electronic device of the present invention is not limited to the above-described embodiment, but may be, for example, a parent-child clock or a repeater. Here, the parent-child clock is a clock that transmits time information held by the parent clock to the child clock by radio or the like, and the child clock corrects the time based on the time information. Therefore, for example, a master clock including a wall clock and a table clock is configured by the electronic device of the present invention, and further, a signal of the predicted correction amount calculated by the correction amount calculation unit of the master clock is transmitted to the slave clock, (Wristwatch, table clock, etc.) may adjust the time according to the estimated correction amount.
In addition, the master clock transmits to the slave clock the amount of correction (difference between each time data inside and outside) when the master schedule receives external wireless information such as radio waves at predetermined reception intervals by the reception schedule control unit. The time may be adjusted based on the amount,
Similarly, the present invention is applied to a repeater that receives external wireless information and transfers the same to a clock device or the like, and a time correction device for predicting a correction signal or a signal of a correction amount due to radio waves received at a predetermined reception interval like the master clock. , And the timing device receives the information and corrects the time so that the accurate time can be displayed.
[0123]
Further, the electronic device of the present invention is not limited to a radio-controlled timepiece, but may be any device that performs some processing or operation using accurate time information, such as a personal computer, an electronic toy, and a timer. In particular, the present invention has an effect of reducing power consumption, and thus is suitable for a battery-driven portable electronic device. In this case, not only a device using a normal primary battery but also a device having various generators such as a solar battery may be used. In this case, there is an advantage that power consumption can be reduced and a duration can be extended.
[0124]
[Other embodiments of the present invention]
Other aspects of the present invention are described below.
A reception control method for an electronic device according to a first aspect includes an electronic device including: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A reception control method for a device, comprising: comparing external time data, which is time information received by the external wireless information receiving unit, and internal time data, measured by the internal time counting unit, and outputting a difference amount thereof A comparing step, a receiving information storing step of storing at least a plurality of times of each time of the difference amount at the time when the external wireless information is received by the external wireless information receiving unit, and the plurality of receiving time data, difference amount data And a correction amount calculating step of calculating a predicted correction amount based on an elapsed time from a previous reception, and an internal time correction system for correcting an internal time using the predicted correction amount. It is characterized in further comprising the steps, a.
[0125]
A second aspect is the first aspect, further comprising a schedule control step of controlling a reception schedule in the external wireless information receiving unit, and wherein the internal time correction control step receives external wireless information based on a reception schedule. In this case, if acquisition of time information fails, the internal time is corrected using the predicted correction amount.
[0126]
A third aspect is the first or second aspect, further comprising a schedule control step of controlling a reception schedule in the external wireless information receiving unit, and wherein the internal time correction control step is performed by the reception schedule control step. When the reception is not performed even though the reception time is in the reception schedule of the initial setting due to the change in the internal time, the internal time is corrected using the predicted correction amount.
[0127]
According to a fourth aspect, in any one of the first to third aspects, an external operation unit for instructing forcible reception of external wireless information by the external wireless information receiving unit is provided, and the internal time correction control step includes: When forced reception is instructed by the user operating the operation unit, if acquisition of time information by receiving the external wireless information fails, the internal time is corrected using the predicted correction amount. It is to be.
[0128]
According to a fifth aspect, in any one of the first to third aspects, the apparatus further comprises a magnetic field detection unit for detecting electromagnetic noise, and when the electromagnetic noise is detected by the magnetic field detection unit, a receiving operation of the external wireless information receiving unit is performed. It is characterized by including a reception processing control step of prohibiting or invalidating received data.
[0129]
A sixth aspect is the fifth aspect, further comprising a receiving schedule control step of controlling a receiving schedule in the external wireless information receiving unit, and the internal time correction controlling step includes the step of transmitting external wireless information based on the receiving schedule. At the time of reception, if electromagnetic noise is detected by the magnetic field detection unit and reception operation is prohibited or reception data is invalidated by the reception processing control step and acquisition of time information fails, the predicted correction amount is used. The internal time is corrected by using the following method.
[0130]
A seventh aspect is the fifth or sixth aspect, further comprising an external operation unit for instructing the external wireless information receiving unit to forcibly receive external wireless information, and wherein the internal time correction control step includes: When forced reception is instructed by a user's operation, electromagnetic noise is detected by the magnetic field detection unit, and reception operation is prohibited or received data is invalidated by the reception processing control step to obtain time information. If the process fails, the internal time is corrected using the predicted correction amount.
[0131]
An eighth aspect is a reception control method for an electronic device including: an external wireless information receiving unit that receives external wireless information including time information; and an internal time counting unit that counts an internal time based on a reference clock. A time data comparing step of comparing the external time data, which is the time information received by the external wireless information receiving unit, with the internal time data measured by the internal time counting unit, and outputting a difference amount between the external time data and the external wireless information; A reception information storing step of storing at least a plurality of times of the time when the external wireless information is received by the receiving unit and the amount of the difference at that time, and the plurality of reception time data and the difference stored in the reception information storage unit A schedule control step of controlling a reception schedule in the external wireless information receiving unit based on the amount data. That.
[0132]
According to a ninth aspect, in any one of the second, third, sixth and eighth aspects, the reception schedule control step may be configured such that an average value of time correction values per unit time obtained from the reception timing and the difference amount is an average value. When the time is smaller than the first set value for the variation and / or when the variation of the time correction value is smaller than the first set value for the variation, the reception schedule is changed so that the reception interval is longer than the initial setting. It is characterized by the following.
[0133]
In a tenth aspect based on the ninth aspect, in the reception schedule control step, the reception schedule is set so that the reception interval is longer than the initial setting by skipping the reception timing in the initialization reception schedule at least once. It is characterized by being changed.
According to an eleventh aspect, in any one of the second, third, sixth, eighth, ninth and tenth aspects, the reception schedule control step includes averaging a time correction value per unit time obtained from the reception timing and the difference amount. If the value is larger than the second set value for the average value and / or the variation of the time correction value for each reception time is larger than the second set value for the variation, the reception interval is larger than the initial setting. It is characterized in that the reception schedule is changed so as to be shorter.
According to a twelfth aspect, in any one of the second, third, sixth, eighth, ninth, tenth, and eleventh aspects, there is provided a reception schedule storage unit in which a plurality of reception schedule information in the external wireless information reception unit is stored. The receiving schedule control step is characterized in that the receiving schedule is controlled by selecting the receiving schedule information in the receiving schedule storage unit.
[0134]
According to a thirteenth aspect, in any one of the first to seventh aspects, the internal time correction control step includes the step of, when the predicted correction amount calculated by the correction amount calculation unit is larger than or equal to the correction amount determination value, the prediction correction. It is characterized in that the internal time is corrected using the quantity. In a fourteenth aspect, in any one of the first to thirteenth aspects, the plurality of reception time data and difference amount data stored in the reception information storage step are the latest among a plurality of data received in the past. It is characterized by being data for a predetermined number of times.
[0135]
According to a fifteenth aspect, in any one of the first to fourteenth aspects, there is provided a setting changing step of changing at least one of the set values and the determination values.
According to a sixteenth aspect, in any one of the first to fifteenth aspects, the electronic device is a radio-controlled timepiece including a display step of displaying an internal time measured by the internal time counting unit. Is what you do.
[0136]
A reception control program for an electronic device according to a seventeenth aspect includes an external wireless information receiving unit that receives external wireless information including time information, and an internal time counting unit that counts an internal time based on a reference clock. A computer incorporated in an electronic device compares the external time data, which is the time information received by the external wireless information receiving unit, with the internal time data measured by the internal time counting unit, and outputs the difference amount. A comparing unit, a reception information storage unit in which the external radio information is received by the external radio information receiving unit and data of the difference amount at that time are stored at least a plurality of times, and the plurality of reception timing data, the difference amount A correction amount calculating unit that calculates a predicted correction amount based on data and an elapsed time from the previous reception, and an internal unit that corrects an internal time using the predicted correction amount Wherein the function as time correction control unit.
[0137]
A reception control program for an electronic device according to an eighteenth aspect includes an external radio information receiving unit that receives external radio information including time information, and an internal time clock unit that counts an internal time based on a reference clock. A computer incorporated in an electronic device compares the external time data, which is the time information received by the external wireless information receiving unit, with the internal time data measured by the internal time counting unit, and outputs the difference amount. A comparison unit, a reception information storage unit in which each data of the difference amount at the time when the external radio information is received by the external radio information reception unit and the difference amount at that time is stored in the reception information storage unit; A reception schedule system for controlling a reception schedule in the external wireless information receiving unit based on the plurality of reception time data and the difference amount data It characterized in that to function as a part.
[0138]
Furthermore, a reception control program for an electronic device according to another aspect of the present invention includes an external wireless information receiving unit that receives external wireless information including time information, and an internal time counting unit that counts an internal time based on a reference clock. The program is a program for causing a computer incorporated in an electronic device having the following to execute the reception control method according to the first to sixteenth aspects.
A computer-readable recording medium according to another aspect of the present invention includes an external wireless information receiving unit that receives external wireless information including time information, and an internal time clock unit that counts an internal time based on a reference clock. And a computer-readable recording medium that records a program for causing a computer incorporated in an electronic device having the above to execute the reception control method according to the first to sixteenth aspects. .
[0139]
The same functions and effects as those of the invention of the electronic device can be achieved by such methods, programs, and configurations of the recording medium.
Further, in these inventions, when the computer is operated by the program, it is possible to easily change the set values and the determination values. That is, if provided as a program, it can be installed and incorporated in a recording medium such as a CD-ROM or an electronic device via a communication means such as the Internet. Optimal and simple settings can be made according to characteristics and the like, and more accurate reception control can be performed.
[0140]
【The invention's effect】
As described above, according to the electronic apparatus of the present invention, when electromagnetic noise is detected or when radio wave reception failure is detected, the time can be corrected with the predicted correction amount, so that correct time information can be obtained. Even in the case where there is no data, a first effect is obtained that almost accurate time data can be output.
Further, if a reception schedule control unit that controls the reception schedule based on the reception time data and the difference amount data is provided, a more accurate time data can be output while reducing the power consumption accompanying the reception. It works.
In addition, if the correction amount calculating unit based on the predicted correction amount is provided, in addition to the second effect, even when the correction amount increases, the power consumption associated with reception can be reduced and accurate time data can be output. A third effect is also achieved.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a radio-controlled timepiece according to a first embodiment of the invention.
FIG. 2 is a block diagram illustrating a configuration of a control circuit according to the first embodiment.
FIG. 3 is a diagram showing a data configuration of a reception information storage unit in the first embodiment.
FIG. 4 is a diagram showing a data configuration of a reception schedule storage unit in the first embodiment.
FIG. 5 is a flowchart showing the operation of the control circuit in the first embodiment.
FIG. 6 is a flowchart showing a reception schedule changing process in the first embodiment.
FIG. 7 is a flowchart showing a reception interval extension process in the first embodiment.
FIG. 8 is a flowchart showing a time correction process with a predicted correction amount in the first embodiment.
FIG. 9 is a graph showing a temporal change of a time correction value in the first embodiment.
FIG. 10 is a block diagram illustrating a configuration of a control circuit according to a second embodiment of the present invention.
FIG. 11 is a flowchart illustrating an operation of a control circuit according to the second embodiment.
FIG. 12 is a flowchart illustrating a time correction process using a predicted correction amount according to the second embodiment.
FIG. 13 is a block diagram illustrating a configuration of a control circuit according to a third embodiment of the present invention.
FIG. 14 is a flowchart illustrating an operation of a control circuit according to the third embodiment.
FIG. 15 is a graph showing a temporal change of a time correction value in a modification of the present invention.
FIG. 16 is a graph showing a temporal change of a time correction value according to another modification of the present invention.
FIG. 17 is a graph showing a temporal change of a time correction value according to another modification of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Radio-controlled timepiece, 21 ... Antenna, 22 ... Receiving circuit, 23 ... Data storage circuit, 24 ... Control circuit, 25 ... Display drive circuit, 26 ... Hand position detection circuit, 27 ... Battery, 28 ... Display part, 29 ... External operation unit, 50: reference oscillation source, 51: oscillation circuit, 52: frequency dividing circuit, 53: time counter, 54: comparison circuit (time data comparison unit), 60: reception control unit, 61: internal time correction control unit , 62: correction amount calculation unit, 63: reception schedule control unit, 70: storage unit, 71: reception information storage unit, 72: reception schedule storage unit, 73: set value storage unit, 81: magnetic field detection unit, 82: reception Processing control unit.

Claims (1)

An external wireless information receiving unit that receives external wireless information including time information,
An internal time keeping unit that measures the internal time based on a reference clock;
A time data comparison unit that compares the external time data that is the time information received by the external wireless information reception unit and the internal time data that is timed by the internal time clock unit and outputs the difference amount,
A storage unit, a reception control unit, and a display unit,
The storage unit includes a reception information storage unit in which each data of the amount of difference and the time when the external wireless information is received by the external wireless information reception unit is stored at least a plurality of times,
The reception control unit, the plurality of reception timing data, difference amount data and a correction amount calculation unit that calculates a predicted correction amount based on the elapsed time from the previous reception time,
An internal time correction control unit that corrects the internal time using the difference amount or the predicted correction amount,
The electronic device, wherein the display unit displays a time type indicating whether the internal time is a time corrected by the difference amount or a time corrected by the predicted correction amount.

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