JP2004184102A - Electronic equipment, transmitting and receiving control method for electronic equipment, and transmitting and receiving system for electronic equipment group - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic equipment that can output substantially accurate time data even when accurate time information based on external radio information is not acquired, and a system therefor. <P>SOLUTION: A master radio-controlled timepiece is provided with an antenna 21 for receiving the external radio information including the time information, a reception circuit 22, a time counter 53 locking interval time and the like. A control circuit 24 for a timepiece is provided with a comparison circuit 54 for comparing the received external time data with an internal time data to output a difference level therebetween, a received information storage part 71 for storing respective data of received timings of the external radio information and the difference levels by at least a plurality of times, a correction quantity calculating part 62 for calculating a predicted correction quantity based on the plurality of received timing data, the difference level data and a lapse time counted from the last reception, an internal time correction control part 61 for correcting the internal time using the predicted correction quantity, and a transmission part for transmitting a transmission signal from the time correction control part 61. A slave electronic timepiece is provided with a reception part for receiving the transmission signal from the transmission part, and a display part for correcting the timepiece based on the reception of the transmission signal to display corrected time. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic device and a transmission / reception control method for an electronic device and a transmission / reception system for an electronic device group that perform processing such as operation correction by receiving wireless information from the outside. The present invention relates to an electronic device typified by a radio-controlled timepiece for correction, a transmission / reception control method for the electronic device, and a transmission / reception system for an electronic device group.
[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.
[0003]
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.
[0004]
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.
[0005]
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.
[0006]
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).
[0007]
[Patent Document 1]
JP-A-7-159559
[0008]
[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.
[0009]
This problem has a similar problem not only for electronic devices that directly receive external wireless information, but also for other electronic devices that receive the received external wireless information transmitted from the transmission unit of the electronic device.
[0010]
The electronic device is, for example, a master clock or a repeater without a clock display function, and the other electronic device performs a specific operation using accurate time information such as a personal computer, an electronic toy, and a timer. Various electronic devices to be controlled may cause the same problem as described above.
[0011]
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, a transmission / reception control method for the electronic device, and transmission / reception of an electronic device group. It is to provide a system.
[0012]
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.
[0013]
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, a transmission / reception control method for the electronic device, and a transmission / reception system for an electronic device group. It is in.
[0014]
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.
[0015]
A third object of the present invention is to provide, in addition to the second object, an electronic device and an electronic device capable of reducing power consumption due to reception and capable of outputting accurate time data even when the correction amount becomes large. An object of the present invention is to provide a transmission / reception control method and a transmission / reception system for a group of electronic devices.
[0016]
[Means for Solving the Problems]
Electronic device of the present invention, an external wireless information receiving unit that receives external wireless information including time information, an internal time clock unit that clocks the internal time based on a reference clock,
A time data comparing unit that compares the external time data, which is the time information received by the external wireless information receiving unit, and the internal time data measured by the internal time counting unit, and outputs a difference amount between the external time data and the storage unit; A control unit, and a transmission unit for transmitting internal data to the outside, wherein the storage unit has at least a plurality of data of the time when the external radio information was received by the external radio information reception unit and the difference amount at that time. A reception information storage unit that is stored in batches, the reception control unit includes a correction amount calculation unit that calculates a prediction correction amount based on the plurality of reception time data, the difference amount data, and an elapsed time since last reception; An internal time correction control unit that corrects the internal time using the correction amount, wherein the transmitting unit is configured to output the external wireless information when the external wireless information receiving unit receives the external wireless information effectively. Time data based on the time data, when the external wireless information is not received effectively, having a transmission control unit for transmitting the internal correction time data in which the internal time is corrected based on the predicted correction amount to the outside It is a feature.
[0017]
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.
[0018]
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.
[0019]
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. This means that the information could not be obtained, the transmission was temporarily stopped due to maintenance of an external wireless information transmission station, or the reception was not effectively performed in a magnetic storm environment. 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.
[0020]
By correcting the internal time using the predicted correction amount inside the electronic device, the transmission time information transmitted to another electronic device becomes more accurate, so that the other electronic device also has accurate time information. And the time display is also accurate.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
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.
[0033]
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.
[0034]
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.
[0035]
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 the time information and the internal time data measured by the internal time counting unit and outputs the difference, a storage unit, a reception control unit, and an internal time correction control unit And a transmission unit for transmitting internal time data to the outside, wherein the storage unit stores at least a plurality of times 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. A reception information storage unit to be stored, wherein the reception control unit receives the external wireless information based on the plurality of reception time data and difference amount data stored in the reception information storage unit. A reception schedule control unit that controls a reception schedule in the unit, the internal time correction control unit corrects the internal time data based on the difference amount, and the transmission unit performs the internal time correction based on the difference amount. The method is characterized in that the data is corrected or modified internal time data or the external time data is transmitted to the outside.
[0036]
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.
[0037]
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.
[0038]
In addition, the internal time data corrected or corrected based on the difference amount by the transmission unit or the external time data is transmitted to another external electronic device. The clock can be adjusted to the correct time by receiving the transmitted data.
[0039]
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.
[0040]
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.
[0041]
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.
[0042]
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.
[0043]
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.
[0044]
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.
[0045]
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, What is necessary is just to set to about 0.25 second / 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.
[0046]
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.
[0047]
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.
[0048]
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.
[0049]
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.
[0050]
With such a change of the reception schedule, the change of the reception schedule can be easily performed.
[0051]
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.
[0052]
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 will occur even if the correction is made in step (1).
[0053]
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.
[0054]
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.
[0055]
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.
[0056]
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.
[0057]
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.
[0058]
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.
[0059]
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.
[0060]
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.
[0061]
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.
[0062]
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. .
[0063]
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.
[0064]
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.
[0065]
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.
[0066]
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.
[0067]
Further, in the present invention, the electronic device is a parent electronic device, a transmission and reception system of an electronic device group including a child electronic device that receives transmission data transmitted from the parent electronic device, wherein the child electronic device, It is preferable that a reception unit that receives the time data based on the external time data transmitted by the transmission unit of the parent electronic device and the internal correction time data based on the predicted correction amount is provided.
[0068]
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.
[0069]
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.
[0070]
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.
[0071]
An electronic device transmission / reception control method according to the present invention includes an external wireless information receiving unit that receives external wireless information including time information, an internal time clock unit that clocks an internal time based on a reference clock, and an internal data externally. A transmitting unit for transmitting, and a transmission / reception control method for an electronic device, comprising: 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. A time data comparing step of outputting the difference amount, 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 external wireless information receiving section and the difference amount at that time, A correction amount calculating step of calculating a predicted correction amount based on a plurality of reception timing data, difference amount data, and an elapsed time since the previous reception; and receiving the external wireless information. However, when the external wireless information is effectively received, time data based on the external time data is used, and when the external wireless information is not effectively received, the internal time is corrected based on the predicted correction amount. And transmitting a time data to the outside.
[0072]
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.
[0073]
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. The correct correction time information can be transmitted to the outside, and the correct time can be displayed by, for example, receiving the child electronic device.
[0074]
An electronic device transmission / reception control method according to the present invention includes an external wireless information receiving unit that receives external wireless information including time information, an internal time clock unit that clocks an internal time based on a reference clock, and an internal data externally. A transmitting unit for transmitting, and a method for controlling reception of the electronic 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. A time data comparing step of outputting the difference amount, 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 external wireless information receiving section and the difference amount at that time, A plurality of reception time data, a difference amount data and a correction amount calculating step of calculating a predicted correction amount based on an elapsed time from the previous reception, and using the predicted correction amount An internal time correction control step of correcting the external time, the external wireless information receiving unit, when the external wireless information is received effectively, the time data based on the external time data, the external wireless information in the external wireless information receiving unit A time data transmitting step of transmitting, to the outside, internal correction time data in which the internal time is corrected based on the predicted correction amount when acquisition of time information by information reception has failed.
[0075]
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, and an external electronic device can also display an accurate time.
[0076]
An electronic device transmission / reception control method according to the present invention includes an external wireless information receiving unit that receives external wireless information including time information, an internal time clock unit that clocks an internal time based on a reference clock, and an internal data externally. A transmitting unit for transmitting, and a transmission / reception control method for an electronic device, comprising: 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. A time data comparing step of outputting the difference amount, 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 external wireless information receiving section and the difference amount at that time, A correction amount calculating step of calculating a predicted correction amount based on a plurality of reception timing data, difference amount data, and an elapsed time since the previous reception, and detecting electromagnetic noise A field detection step, a reception control step of prohibiting a reception operation in an external radio information reception unit or invalidating received data when detecting electromagnetic noise in the magnetic field detection step, and the external radio information reception unit includes: When the external radio information is received effectively without detecting the magnetic field noise in the magnetic field detection step, the time data based on the external time data is corrected, and when the magnetic field noise is detected, the internal time is corrected based on the predicted correction amount. A time data transmitting step of transmitting the internally corrected time data to be externally performed.
[0077]
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, and an external electronic device can also display an accurate time.
[0078]
An electronic device transmission / reception control method according to the present invention includes an external wireless information receiving unit that receives external wireless information including time information, an internal time clock unit that clocks an internal time based on a reference clock, and an internal data externally. A transmission / reception control method for an electronic device having a transmission unit for transmitting, wherein the external time data received by the external wireless information reception unit and external time data and internal time data measured by the internal time clock unit are compared. A time data comparison step of outputting the difference amount; a reception information storage step of storing at least a plurality of times of the time when the external wireless information is received by the external wireless information receiving unit and the difference amount data at that time; Controlling 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 information storage unit; A schedule control step, an internal time correction step of correcting the internal time data based on the difference amount, and a time data transmission step of transmitting the internally corrected time data or the external time data at which the internal time is corrected to the outside. And the following.
[0079]
Here, the transmission / reception control method includes: a correction amount calculating step of calculating 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 predicted correction amount. And an internal time adjustment control step of adjusting the time.
[0080]
In each of these transmission / reception control methods, the same operation and effect as those of the invention of the electronic device, such as the operation and effect described above, can be obtained.
[0081]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0082]
[First Embodiment]
FIG. 1 shows an outline of a transmission / reception system between a master radio-controlled timepiece (parent electronic device) 1 and a slave electronic timepiece (slave electronic device) 101 according to the first embodiment.
[0083]
The master radio-controlled timepiece 1 includes a receiving unit 18 having a receiving antenna 21 for receiving a radio wave including standard time information transmitted from a ground transmitting station, and measuring the internal time and receiving the radio wave received by the receiving unit 18. A time counting unit 19 having a control circuit 24 for receiving the received signal, correcting the internal time, outputting corrected time data, and displaying a time based on the internal time data or the corrected time data; And a transmitting unit 20 for transmitting the data to the outside by a transmitting antenna 92.
[0084]
The slave electronic timepiece 101 includes a slave receiving unit 118 provided with a slave receiving antenna 121 that receives a corrected time data signal transmitted from the transmitting antenna 92, and an internal time and the corrected time received by the slave receiving unit 118. A sub-timer 119 having a sub-control circuit 124 for correcting the internal time by data, outputting corrected time data, and displaying a time based on the internal time data or the corrected time data.
[0085]
The sub-electronic timepiece 101 may be provided not only in one case but also in plural cases. For example, in the event venue, when the parent radio-controlled clock 1 is installed in the clock tower of the main venue, and when a visitor in the event venue carries each of the child electronic clocks 101, the person carrying each of the child electronic clocks 101 The same accurate time as the parent radio-controlled timepiece 1 can be displayed. In this case, even if the master radio-controlled timepiece 1 is advanced or delayed to some extent, each of the child electronic timepieces 101 can display substantially the same time as the master radio-controlled timepiece 1, and the difference in the time display by the wearer is small. There is an advantage that synchronized activities can be performed without any occurrence.
[0086]
FIG. 2 shows a circuit configuration of the master radio-controlled timepiece 1.
[0087]
The parent radio-controlled timepiece 1 includes an antenna 21 that receives a long-wave standard radio wave (external radio information) on which time information is superimposed, and a receiving unit that processes the long-wave standard radio wave received by the antenna 21 and outputs it as time information (time code). , A data storage circuit 23 for storing time information output from the reception circuit 22, and a control circuit 24 including an oscillation circuit for oscillating a reference oscillation source 50 such as a crystal oscillator and outputting an oscillation signal. A display drive circuit 25 that controls the driving of a display unit 28 that displays time, a hand position detection circuit 26 that detects a hand position of a pointer of the display unit 28, and a battery 27 as a power supply that drives each circuit. The display unit 28 includes hands such as an hour hand, a minute hand, and a second hand, and a motor for driving the hands. A transmission control unit 90 for selectively inputting a plurality of time data to be output, a transmission circuit 91 for transmitting the time data selected by the transmission control unit 90 to the outside, and a transmission for transmitting a radio wave to the outside by the transmission circuit 91 An antenna 92 is provided.
[0088]
In this case, the receiving section 18 includes the antenna 21, the receiving circuit 22, and the data storage circuit 23, and includes the reference oscillation source 50, the control circuit 24, the display driving circuit 25, the hand position detecting circuit 26, and the battery 27. , A display unit 28, and a time clock unit 19, and a transmission control unit 90, a transmission circuit 91, and a transmission antenna 92, and a transmission unit 20.
[0089]
The antenna 21 is constituted by a ferrite antenna or the like in which a coil is wound around a ferrite rod.
[0090]
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.
[0091]
Therefore, the external wireless information receiving unit is configured to include the antenna 21, the receiving circuit 22, and the data storage circuit 23.
[0092]
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.
[0093]
4, the control circuit 24 includes an oscillation circuit 51, a frequency dividing circuit 52, a time counter 53, a comparing circuit 54, a reception control unit 60, and a storage unit 70.
[0094]
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.
[0095]
The storage unit 70 includes a reception information storage unit 71, a reception schedule storage unit 72, and a setting value storage unit 73.
[0096]
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.
[0097]
The position of the pointer is detected by the hand position detection circuit 26 and output to the comparison circuit 54.
[0098]
The comparison circuit 54 determines whether the time information (external time data) stored in the data storage circuit 23 is correct time data. If the time information is correct, the hand position of the time information hand position detection circuit 26 is determined. That is, it is configured to output the difference amount from the internal time data (current time data). Therefore, the comparison circuit 54 constitutes a time data comparison unit.
[0099]
In this case, when the comparing circuit 54 determines that the time information stored in the data storage circuit 23 is correct time data, the external time, which is data of the time information received and stored in the data storage circuit 23, is used. The data φ1 is output to the transmission unit 20.
[0100]
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.
[0101]
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.
[0102]
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 correction control unit 61 further causes the received information storage unit 71 to store the data of the difference amount and the time of the time correction, that is, the time of receiving the external wireless information.
[0103]
As shown in FIG. 5, 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. 5, 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.
[0104]
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 square 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.
[0105]
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.
[0106]
That is, in this embodiment, as shown in FIG. 6, five types of schedule information A to E are registered in the schedule schedule storage unit 72 in advance. 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. I do.
[0107]
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.
[0108]
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.
[0109]
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.
[0110]
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.
[0111]
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.
[0112]
The internal time correction control section 61 outputs a time correction signal φ2 corresponding to the difference amount based on the difference amount output from the comparison circuit 54 to the time counter 53 to correct the value of the time counter 53 so that the internal correction time data φ4 is The time prediction correction signal φ3 according to the predicted correction amount by the correction amount calculation unit 62 in response to the output, the time when the reception is not received by the reception schedule control unit 63, the time when the reception is not possible, or the forced reception time Is output to the time counter 53, the value of the time counter 53 is corrected, and the internal corrected time data φ4 is output. The internal corrected time data φ4 corrects the time of the display unit 28 via the display drive circuit 25, and corrects the time. Is displayed.
[0113]
The operation of the master radio-controlled timepiece 1 having such a configuration will be described with reference to the flowcharts of FIGS.
[0114]
First, in FIG. 7, the control circuit 24 measures the current time by counting the 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 in the normal state. 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.
[0115]
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).
[0116]
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).
[0117]
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).
[0118]
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.
[0119]
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).
[0120]
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.
[0121]
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).
[0122]
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).
[0123]
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).
[0124]
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.
[0125]
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).
[0126]
Then, the processes in S3A and S3B and thereafter are repeated based on the changed reception schedule.
[0127]
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.
[0128]
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.
[0129]
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.
[0130]
The reception schedule change processing will be described with reference to the flowchart in FIG.
[0131]
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. 8 (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.
[0132]
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. When the received data has a time correction value as shown in FIG. 12A, the average value of the time correction values for the seven days in which reception and correction are performed from 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.
[0133]
Here, in the graph of FIG. 12, a mark “示 す” 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. 12A, 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.
[0134]
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.
[0135]
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.
[0136]
Therefore, for example, as shown in FIG. 12 (2), when the regression line 100 of each time correction value rises at a fixed 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.
[0137]
A range B shown in FIGS. 12A and 12B represents a range of the first set value for variation. Here, the regression line 100 almost coincides with the graduation line of 0.2 seconds / day in FIG. 12A, and is indicated by a dashed line in FIG. 12B. Note that the regression line 100 shown in FIG. 12A is a regression line as of the 16th day, that is, each of the 7th day of reception and correction on the fourth, fifth, sixth, seventh, ninth, twelfth and sixteenth days. It shows the regression line of the time correction value. Similarly, a regression line 100 shown in FIG. 12 (2) represents a regression line of each time correction value for each of 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.
[0138]
For example, in FIG. 12A, 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.
[0139]
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. 12A, the second set value A2 for the average value is set to 0.30 seconds / day or the like.
[0140]
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).
[0141]
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.
[0142]
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.
[0143]
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. 12A, 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 is changed. 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. .
[0144]
Next, the reception interval extension processing (S30) will be described based on the flowchart of FIG.
[0145]
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.
[0146]
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.
[0147]
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.
[0148]
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.
[0149]
As described above, when the reception schedule change processing (S10) ends, the time correction processing (S11) with the predicted correction amount is subsequently performed.
[0150]
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. 10 (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.
[0151]
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.
[0152]
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).
[0153]
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).
[0154]
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.
[0155]
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.
[0156]
Here, the operation of the transmission unit 20 will be described in detail.
[0157]
First, returning to FIG. 4, when the time information received from the outside by the antenna 21 and the receiving circuit 22 is determined to be correct time data by the comparing circuit 54, the comparing circuit 54 sends the correct time data to the data storage circuit 23. The transmitting unit 20 outputs external time data φ1 as time data. When it is determined that the reception is correct, the above-described time correction signal φ2 is output from the internal time correction control unit 61 to the time counter 53, and the corrected internal corrected time data φ4 is output from the time counter 53, and the display drive is performed. The display unit 28 displays the correct time via the circuit 25 as described above.
[0158]
If the received time information is not judged to be correct time data by the comparing circuit 54, for example, the time is not received by the reception schedule control unit 63, or the time cannot be received, or even the forced reception is performed. In response to the failure in receiving, the time prediction correction signal φ3 corresponding to the prediction correction amount by the correction amount calculation unit 62 is output to the time counter 53, the value of the time counter 53 is corrected, and the time is displayed by the internal correction time data φ4. The time on the display unit 28 is corrected via the drive circuit 25. At this time, the internal correction time data φ4 is also output to the transmission unit 20.
The transmission unit 20 includes a transmission control unit 90, a transmission circuit 91, and a transmission antenna 92.
[0159]
The operation of the transmission control unit 90 is as follows.
[0160]
First, information received from the outside by the antenna 21 and the reception circuit 22 is stored in the data storage circuit 23. When the comparison circuit 54 determines that the stored and received information has been correctly and effectively received. The external time data φ1 output from the data storage circuit 23 is input to the transmission control unit 90, and is also input to the comparison circuit 54 at the same time. Then, the accurate time data in the data storage circuit 23 is compared with the current time data in the hand position detection circuit 26, and the difference is output to the internal time correction control unit 61. Since the internal time correction control section 61 outputs a time correction signal φ2 based on the difference amount to the time counter 53, the count value of the time counter 53 is corrected, and the internal corrected time data φ4, which is corrected correct time data, is output. Is output from the time counter 53, and the display time unit 28 displays the correct time via the display drive circuit 25. At this time, since the internal correction time data φ4 is also sent to the transmission control unit 90, the transmission control unit 90 synchronizes with the timing at which the external time data φ1 is output from the data storage circuit 23. The internal correction time data φ4, which is the correct time data based on the difference, is output to the transmission circuit 91 and transmitted to the slave electronic device 101 via the transmission antenna 92.
[0161]
On the other hand, when the received time information is not determined to be correct time data by the comparison circuit 54, or when the reception time in the reception schedule is skipped due to low power consumption or the like, the correction amount calculation is performed. Since the internal time correction control unit 61 outputs the time prediction correction signal φ3 to the time counter 53 based on the predicted correction amount calculated by the unit 62, the value of the time counter 53 is corrected according to the predicted correction amount. Similarly, internal corrected time data φ4 that is corrected correct time data is output from the time counter 53, and the display time unit 28 displays the correct time via the display drive circuit 25. At this time, since the time prediction correction signal φ3 and the internal correction time data φ4 are also sent to the transmission control unit 90, the transmission control unit 90 does not output the external time data φ1 from the data storage circuit 23. By detecting this, in synchronization with the input timing of the time prediction correction signal φ3, the internal correction time data φ4, which is the correct time data, is output to the transmission circuit 91 and transmitted to the child electronic device 101 via the transmission antenna 92. .
[0162]
That is, the transmission control unit 90 outputs the external time data φ1 from the data storage circuit 23 when the external reception information received by the antenna 21 and the reception circuit 22 is correctly valid. The internal time correction data φ4, which is the time data corrected correctly, is output to the transmission circuit 91 and transmitted to the slave electronic device 101 via the transmission antenna 92. Conversely, the received time information is the correct time data. In the case where it is not determined that there is any data, or when the reception time in the reception schedule is skipped due to low power consumption, etc., the external time data φ1 is not output from the data storage circuit 23, and The internal correction time, which is correct time data corrected based on the predicted correction amount by input of the time prediction correction signal φ3 The chromatography data .phi.4, is to send the child electronic devices 101 via the transmitting circuit 91 and the transmitting antenna 92.
[0163]
The transmission circuit 91 transmits the internal correction time data φ4 to the outside as a radio signal via the transmission antenna 91. This transmission method may be any method as long as short-range communication is possible, for example, a so-called Bluetooth method, an electromagnetic communication method, an optical communication method, or any method. The transmitting antenna 92 is also formed of a ferrite antenna in which a winding is wound around a ferrite core similarly to the antenna 21, but may be an antenna in which a winding is wound around an amorphous core.
[0164]
An operation in which the transmission control unit 90 transmits the internal correction time data φ4 to the slave electronic device 101 via the transmission circuit 91 and the transmission antenna 92 will be described with reference to the flowchart of FIG.
[0165]
In FIG. 11, the reception schedule control unit 63 determines whether or not it is the reception time (S3B). If it is determined that the reception time is reached (Yes), the antenna 21 and the reception circuit 22 operate to receive an external radio wave. Is performed (S4). The external time data φ1 that is the received data is output to the data storage circuit 23, and the comparison circuit 54 compares the external time data φ1 stored in the data storage circuit 23 with the external time data φ1 a plurality of times to determine whether the reception was successful ( S5). If the reception is successful (Yes), the comparison circuit 54 compares the received data stored in the data storage circuit 23 with the current time data of the hand position detection circuit 26 and calculates the difference (S60). Upon receiving the difference amount data, the internal time correction control section 61 outputs a time correction signal φ2 to the time counter 53, so that the current time data of the time counter 53 is corrected and the display drive circuit 25 is displayed by the internal corrected time data φ4. The part 28 is modified (S6). The transmission control unit 90 transmits the corrected internal corrected time data φ4 according to the input of the external time data φ1 to the slave radio-controlled timepiece 101 via the transmission circuit 91 and the transmission antenna 20 (S61).
[0166]
On the other hand, if the reception is not successful in S5 (No), the comparison circuit 54 determines whether or not the number of receptions (the number of time corrections) up to that time has reached a predetermined number (S9). If the number has not reached the predetermined number (No), it is determined again whether or not it is the reception time (S3B). If the predetermined number has been reached, the correction amount calculation unit 62 outputs the predicted correction amount to the internal time correction control unit 61 (S11), and the internal time correction control unit 61 outputs a time prediction correction signal φ3 based on the prediction correction. Is output to the time counter 53, the current time of the time counter 53 is corrected, and the display drive circuit 25 and the display unit 28 are corrected (S6). The transmission control unit 90 transmits the internal corrected time data φ4, which has been corrected in response to the external time data φ1 not being input, to the slave radio-controlled timepiece 101 via the transmission circuit 91 and the transmission antenna 20 (S61).
[0167]
This concludes the description of the parent radio-controlled timepiece 1.
[0168]
Next, the slave electronic timepiece 101 that receives the internal correction time data φ4 will be described.
[0169]
FIG. 3 shows the configuration of the sub electronic timepiece 101.
[0170]
3 differs from FIG. 2 of the parent radio-controlled timepiece 1 in that the transmission unit 20 is omitted, and the other points are almost the same as those in FIG. 2. The symbol in FIG.
[0171]
In FIG. 3, a child electronic timepiece 101 includes a child antenna 121 that receives a radio signal of the internal corrected time data φ4 transmitted from the transmission antenna 92 of the parent radio-controlled timepiece 1, a child reception circuit 122 that processes the received signal, and , A child data storage circuit 123 for storing the internal corrected time data φ4 output from the child receiving circuit 122, and a child control including an oscillation circuit for oscillating a child reference oscillation source 150 such as a crystal oscillator and outputting an oscillation signal. A circuit 124, a child display drive circuit 125 for controlling the driving of a child display unit 128 for displaying time, a child hand position detection circuit 126 for detecting the position of the hands of the hands of the child display unit 128, and a power supply for driving each circuit And a child display unit 128 composed of hands such as an hour hand, a minute hand, and a second hand, and a step motor for driving the hands.
[0172]
In this case, the child receiving section 118 includes the child antenna 121, the child receiving circuit 122, and the child data storage circuit 123. The child reference oscillation source 150, the child control circuit 124, the child display driving circuit 125, and the child needle A sub-timekeeping unit 119 includes the position detection circuit 126, the sub-battery 127, and the sub-display unit 128.
[0173]
The sub-antenna 121 is composed of a ferrite antenna in which a coil is wound around a ferrite rod.
[0174]
Upon receiving the internal correction time data φ4, the child receiving circuit 122 includes an amplifier circuit, a band-pass filter, a demodulation circuit, a decoding circuit, and the like (not shown), and stores the received internal correction time data φ4 in the child data storage circuit 123. Let it.
[0175]
Therefore, the child external wireless information receiving unit 118 is configured to include the child antenna 121, the child receiving circuit 122, and the child data storage circuit 123.
[0176]
The internal correction time data φ4 stored in the child data storage circuit 123 is processed by the child control circuit 124.
[0177]
Although the configuration of the slave control circuit 124 is not shown, it has the same configuration as that of FIG. 4 showing a main part of the master radio-controlled timepiece 1 except for a part thereof. An oscillating circuit, a child frequency dividing circuit, a child time counter, a child display driving circuit receiving a time signal from the child time counter, a child stepping motor driven by the child display driving circuit, and a child display unit 128 driving each hand. And a normal time is displayed. Further, the child control circuit 124 detects the time data of the internal correction time data φ4 output from the child data storage circuit 123 and the needle position detected by the child needle position detection circuit 126 which detects the needle position of the child display unit 128. Comparison circuit for comparing the current time data with the current time data and outputting the difference amount, and a child internal time adjustment control for outputting a time adjustment signal based on the difference amount data output from the child comparison circuit to a child time counter Part.
[0178]
Therefore, in the child electronic timepiece 101, the child time counter is corrected based on the time prediction internal correction time data φ4, so that the child display unit 128 can perform accurate time display.
[0179]
Therefore, the child electronic timepiece 101 can perform the same accurate time display as the master radio-controlled timepiece 1 without having the complicated reception control unit 60, the storage unit 70, and the like, unlike the master radio-controlled timepiece 1. You can do it.
[0180]
According to this embodiment, the following effects can be obtained.
[0181]
(1) In the present embodiment, when the parent radio-controlled timepiece 1 cannot receive radio waves or cannot receive correct data due to the influence of noise or the like and cannot obtain correct time information, the correction amount calculation unit 62 Since the internal correction is calculated using the predicted correction amount and the internal time is corrected using the predicted correction amount, even when the time cannot be corrected by the external wireless information, the time indicating error can be suppressed to a small value, and the time indicating accuracy can be reduced. Electronic device with high reliability.
[0182]
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.
[0183]
(2) Further, the correction amount calculation unit 62 corrects the time only when the predicted correction amount is equal to or more than the determination value, and does not perform the time correction when the predicted correction amount is equal to or less than the determination value. Power consumption can be further reduced.
[0184]
(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 to the case where the reception interval is changed, a schedule can be set based on more accurate reception information, the possibility of occurrence of an error can be reduced, and the deviation of time data output to the display unit 28 or the like, that is, an instruction error can be reduced. Can be minimized.
[0185]
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.
[0186]
(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 increase the receiving interval, the 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. , There is almost no error in the time indication even if the radio wave reception interval is extended.
[0187]
(5) In addition, when the reception schedule is changed, not only the determination based on the average time correction value but also the variation in the time correction value is used. 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 variation is small even if the average value of the time correction values is high, the radio wave reception interval is lengthened, so that the power consumption of the master radio time correction watch 1 can be further reduced.
[0188]
(6) Further, the reception schedule control unit 63 performs not only the process of extending the reception interval, but also when the variation of the time correction value is larger than the second setting value for variation, or when 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.
[0189]
(7) Since the external operation unit 29 is provided so that forced reception can be performed, the user can perform radio wave reception at free timing even when the reception schedule interval is lengthened by the reception schedule control unit 63. . 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.
[0190]
(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.
[0191]
(9). The above is the effect of the master radio-controlled timepiece 1. As described above, the sub-electronic timepiece 101 is also controlled by the internal correction time data φ4 transmitted from the transmission unit 20 of the master radio-controlled timepiece 1 as described above. The same accurate time can be displayed.
[0192]
That is, based on the internal correction time data φ4 output from the child internal time correction control unit of the child electronic timepiece 101, the reception signal of the reception unit 18 of the master radio timepiece 1 and the hand position signal of the hand position detection circuit 26 are compared. The slave time counter of the slave electronic timepiece 101 can be corrected based on the difference amount obtained as a result of the comparison by the circuit 54, and the slave display unit 128 can display an accurate time. In addition, the child time counter of the child electronic timepiece 101 is corrected according to the predicted correction amount obtained by the reception schedule control unit 63, the correction amount calculation unit 62, and the like of the parent radio-controlled timepiece 1, and similarly, the child display unit 128 Time display can be performed.
[0193]
(10). Therefore, the child electronic timepiece 101 does not include the complicated reception control unit 60, the storage unit 70, the comparison circuit 54, and the like, as in the master radio-controlled timepiece 1, and displays the same accurate time as the master radio-controlled timepiece 1. Is what you can do.
[0194]
[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. Here, only the parent radio-controlled timepiece 1 will be described, but the child electronic timepiece 101 is the same as in the first embodiment, and a description thereof will be omitted.
[0195]
The master 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. The configuration is the same as in the first embodiment.
[0196]
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.
[0197]
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.
[0198]
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.
[0199]
In the second embodiment, the control is performed as shown in FIGS. That is, as shown in FIG. 14, when the reception schedule control unit 63 determines that the forced reception has been performed (S3A) or when 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).
[0200]
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).
[0201]
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). ).
[0202]
The flowchart of the time adjustment process of the present embodiment can be applied to FIG. 11 by replacing “successful reception” in S5 with “no magnetic field” in FIG.
[0203]
Since the time correction process of the present embodiment is executed when electromagnetic noise is detected at the time of receiving radio waves, when compared with the processing 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.
[0204]
Also in the present embodiment, when the magnetic field is not detected and the normal reception becomes valid, the external time data φ1 as time information is output from the data storage circuit 23 to the transmission control unit 90, and the difference amount is output. Based on the current time data of the time counter 53 based on the correction, the corrected internal corrected time data φ4 is output to the transmission control unit 90. Therefore, the transmission control unit 90 sends the slave electronic timepiece 101 via the transmission circuit 91 and the transmission antenna 92. Is sent to On the other hand, when the magnetic field is detected, the time prediction correction signal φ3 is output from the internal time correction control unit 61 to the time counter 53 based on the predicted correction amount as described above, so that the current time of the time counter 53 is corrected. The internal correction time data φ4 corrected in this way is output to transmission control section 90. The transmission control unit 90 transmits the internal correction time data φ4 based on the predicted correction amount to the slave electronic timepiece 101 via the transmission circuit 91 and the transmission antenna 92 because the external time data φ1 is not output to the transmission control unit 90. Things.
[0205]
The slave electronic timepiece 101 corrects the internal time data based on the corrected internal correct time data φ4, so that even if a magnetic field is detected, the time is correctly corrected as in the first embodiment. .
[0206]
In this embodiment, all the effects of the first embodiment can be obtained, and the following effects can be obtained.
[0207]
(11) 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.
[0208]
(12) Further, even when radio waves cannot be received due to electromagnetic noise, the time correction processing based on the predicted correction amount is performed, so that the occurrence of pointing errors 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.
[0209]
[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 embodiment are denoted by the same reference numerals, and description thereof will be omitted. Here, only the parent radio-controlled timepiece 1 will be described, but the child electronic timepiece 101 is the same as in the first embodiment, and a description thereof will be omitted.
[0210]
As shown in FIG. 16, the master 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 transmitting station side. When the radio wave reception fails due to a natural phenomenon such as a magnetic storm or a magnetic storm, only the information that the radio wave reception has failed is notified from the comparison circuit 54 to the correction amount calculation unit 62. This is the same as the first embodiment.
[0211]
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.
[0212]
In the third embodiment, the control is performed as shown in FIG. That is, as shown in FIG. 16, 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.
[0213]
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.
[0214]
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).
[0215]
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.
[0216]
The time correction process of the present embodiment is the same as the process flow of the second embodiment shown in FIG.
[0219]
In the present embodiment, signal processing such as φ1, φ2, φ3, and φ4, transmission to the child electronic timepiece 101 based on the internal correction time data φ4 by the transmission control circuit, and child correction based on the received internal correction time data φ4 Correcting the time of the electronic timepiece 101 is the same as in the first embodiment.
[0218]
In this embodiment, all the effects of the first embodiment can be obtained, and the following effects can be obtained.
[0219]
(13) 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 process 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.
[0220]
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.
[0221]
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.
[0222]
For example,
In the transmitting means, when the external wireless information receiving section receives the external wireless information effectively, the transmitting section outputs time data based on the external time data and validates the external wireless information. When not receiving (including when magnetic field noise is detected), it is mentioned that the transmission control unit causes the internal correction time data in which the internal time is corrected based on the predicted correction amount to be transmitted to the outside, The time data based on the external time data when the external wireless information is effectively received is described as internal correction time data φ4 in each embodiment, and based on the estimated correction amount when the external wireless information is not effectively received. In each embodiment, the internal correction time data whose internal time is corrected is also described as the internal correction time data φ4 in each embodiment. It may be modified time data.
[0223]
For example, in FIG. 2, FIG. 4, FIG. 13, FIG. 16, etc., when the external wireless information is effectively received, the transmission control unit 90 controls the external time data φ1 or the internal time correction control output from the data storage circuit. The time correction signal φ2 output from the unit may be transmitted to the slave electronic timepiece 101. Further, when the external wireless information has not been effectively received, the time prediction correction signal φ3 output from the internal time correction control unit may be transmitted to the slave electronic timepiece 101. The sub electronic timepiece 101 may be provided with a circuit configuration capable of receiving each radio wave information. For example, when the time correction signal φ2 or the time prediction correction signal φ3 is transmitted to the slave electronic timepiece 101, the signal φ2 or the signal φ3 is input to the slave time counter and output from the slave time counter. The correct time may be displayed on the child display unit via the child display circuit by correcting the child time data. When the external time data φ1 is transmitted to the slave electronic timepiece 101, the reception means of the reception radio wave such as the antenna 21, the reception circuit 22, the data storage circuit 23, and the control circuit 24 similar to the master radio-controlled timepiece 1 A comparison circuit for comparing the current time data of the slave electronic timepiece 101 with the time data of the external time data φ1, a means for inputting corrected data to a time counter, and the like may be applied.
[0224]
Further, in the first embodiment, in the flowchart of FIG. 7, 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 controlled. May fail, the time correction process may be performed with the predicted correction amount. In this way, when you happen to be in a place where it is difficult to receive radio waves, such as in a building, subway, or underground passage, or when you encounter a magnetic storm at the time of reception, or temporarily stop radio wave transmission at periodic inspections of radio wave transmission bases, etc. In the case where radio waves cannot be received due to a temporary stop, for example, the time can be corrected with the predicted correction amount, so that a large time deviation can be prevented.
[0225]
In the embodiment, as shown in the flowchart of FIG. 8, 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 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.
[0226]
In the embodiment, as shown in the flowchart of FIG. 8, when the average value of the time correction value is equal to or more than the second set value for the 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.
[0227]
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.
[0228]
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.
[0229]
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.
[0230]
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.
[0231]
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.
[0232]
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. 18 (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 necessary for the change control of the reception schedule can be obtained even 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.
[0233]
In the above 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. 18 (4), two allowable ranges A1 and A2 with the reference line set to 0 second / day are set, and when the range exceeds the range A2, the reception interval is shortened every half day. When the correction value returns to A1 or less, it may be extended every day. In the example of FIG. 18D, 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 reduced to half a day. I have.
[0234]
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.
[0235]
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.
[0236]
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.
[0237]
Further, each set value or determination value may be enlarged or reduced in accordance with the passage of elapsed time.
[0238]
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.
[0239]
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.
[0240]
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.
[0241]
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. , 1/4.
[0242]
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.).
[0243]
In the above-described embodiment, the schedule information A to D are gradually selected in the order of the information A, B, C, and D. 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.
[0244]
Further, in each of the above 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.
[0245]
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.
[0246]
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. 19, 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. 19, each time correction amount needs to be within the allowable range C set for the average value curve.
[0247]
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.
[0248]
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.
[0249]
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. , The time can be corrected with high accuracy.
[0250]
Further, the past data is not limited to one week's data, but as shown in FIG. 20, one year's data is accumulated, a monthly correction amount is calculated, and a 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.
[0251]
In addition, the parent 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 be able to. 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.
[0252]
Further, in the parent radio-controlled timepiece 1 and the child electronic timepiece 101, it is determined whether the current time is displayed by the received radio wave or the time corrected by the predicted correction amount. The type may be displayed on a display such as a liquid crystal screen or an organic EL screen. 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.
[0253]
Each of the control means such as the control circuit 24, the transmission control unit 90, and the child control circuit 124 is constituted by hardware such as various logic elements, a CPU (central processing unit), a memory ( A computer provided with a storage device) is provided in the master radio timepiece 1 and the slave radio timepiece 101, and a predetermined program or data (data stored in each storage unit) is incorporated in the computer to realize each unit. It may be configured.
[0254]
For example, a CPU and a memory are arranged in the parent radio-controlled timepiece 1 and the child electronic timepiece 101 so that they can function as a computer. May be installed via a recording medium such as a memory card, and the installed program may be used to operate a CPU or the like to realize each unit.
[0255]
To install a predetermined program or the like in the parent radio-controlled timepiece 1 or the child electronic timepiece 101, a memory card, a CD-ROM, or the like is directly inserted into the parent radio-controlled timepiece 1 or the child electronic timepiece 101. Alternatively, a device for reading these storage media may be externally connected to the master radio-controlled timepiece 1 or the slave electronic timepiece 101. Further, a LAN cable, a telephone line, or the like may be connected to the radio-controlled timepiece 1 or the slave electronic timepiece 101 to supply and install a program or the like by communication. It may be supplied and installed.
[0256]
If the control program or the like provided by such a recording medium or communication means such as the Internet is incorporated in the master radio-controlled timepiece 1 or the slave electronic timepiece 101, the functions of the above-described respective inventions can be realized only by changing the program. A control program desired at the time of shipment or desired by the user can be selected and incorporated. In this case, various radio-controlled timepieces 1 and sub-electronic timepieces 101 having different control formats can be manufactured only by changing the program, so that parts can be shared and the manufacturing cost when developing variations can be greatly reduced.
[0257]
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.
[0258]
Further, the master radio-controlled timepiece 1 and the slave electronic timepiece 101 of the present invention are not limited to analog timepieces, but may also be digital timepieces or timepieces having both analog display hands and digital display liquid crystal display units. May be. Further, as the radio-controlled timepiece 1 and the child electronic timepiece 101, the present invention 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.
[0259]
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.
[0260]
Further, the parent electronic device in the transmission / reception system of the electronic device of the present invention is not limited to the above-described embodiment, and may be, for example, a repeater having no display means. The correction time information may be transmitted based on the radio wave received by the repeater, and the transmitted correction time information may be received by the slave electronic device, and the accurate time information may be used to display the time, for example.
[0261]
Further, the master radio-controlled timepiece may be a wristwatch, a wall clock, a table clock, or the like, and the child electronic timepiece may be a wristwatch, a wall clock, a table clock, or the like.
[0262]
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.
[0263]
[Other embodiments of the present invention]
Other aspects of the present invention are described below.
[0264]
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. This is a program for causing a computer incorporated in an electronic device having the above to execute a transmission / reception control method according to the prior art.
[0265]
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 configuration to execute the transmission / reception control method according to the above aspect.
[0266]
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.
[0267]
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.
[0268]
【The invention's effect】
As described above, according to the electronic device of the present invention, the transmission / reception control method of the electronic device, and the transmission / reception system of the electronic device group, when the electromagnetic noise is detected or the failure of the radio wave reception is detected, the predicted correction amount is used. Since the time can be adjusted, there is a first effect that almost accurate time data can be output even when correct time information cannot be obtained.
[0269]
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.
[0270]
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.
[0271]
Further, the parent electronic device has the above-described effect, and the child electronic device has the same effect. In this case, since the child electronic device does not require a complicated circuit configuration, the electronic circuit can be simplified and the power consumption can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an outline of a transmission / reception system between a master radio-controlled timepiece (master electronic device) and a slave electronic timepiece (slave electronic device) according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a master radio-controlled timepiece according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a configuration of a subordinate electronic timepiece according to the first embodiment of the invention.
FIG. 4 is a block diagram showing a configuration of a control circuit in the master radio-controlled timepiece of the first embodiment.
FIG. 5 is a diagram showing a data configuration of a reception information storage unit in the first embodiment.
FIG. 6 is a diagram showing a data configuration of a reception schedule storage unit in the first embodiment.
FIG. 7 is a flowchart showing the operation of the control circuit in the first embodiment.
FIG. 8 is a flowchart showing a reception schedule changing process in the first embodiment.
FIG. 9 is a flowchart showing a reception interval extension process in the first embodiment.
FIG. 10 is a flowchart showing a time correction process using a predicted correction amount in the first embodiment.
FIG. 11 is a flowchart showing an operation process for transmitting internal correction time data φ4 to the child electronic device 101 in the first embodiment.
FIG. 12 is a graph showing a change over time of a time correction value in the first embodiment.
FIG. 13 is a block diagram illustrating a configuration of a control circuit of a master radio-controlled timepiece according to a second embodiment of the invention.
FIG. 14 is a flowchart illustrating an operation of a control circuit according to the second embodiment.
FIG. 15 is a flowchart illustrating a time correction process using a predicted correction amount according to the second embodiment.
FIG. 16 is a block diagram illustrating a configuration of a control circuit of a master radio-controlled timepiece according to a third embodiment of the invention.
FIG. 17 is a flowchart illustrating an operation of a control circuit according to the third embodiment.
FIG. 18 is a graph showing a temporal change of a time correction value in a modification of the present invention.
FIG. 19 is a graph showing a change over time of a time correction value according to another modification of the present invention.
FIG. 20 is a graph showing a temporal change of a time correction value in another modification of the present invention.
[Explanation of symbols]
1: Pro-wave correction clock
18 receiving unit
19 ・ ・ ・ Timekeeping unit
20 ... transmission unit
21 ... Antenna
22 ... Reception circuit
23 Data storage circuit
24 ... Control circuit
25 Display display circuit
26 ... Needle position detection circuit
27… Battery
28 Display unit
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 setting value storage unit
81: Magnetic field detector
82 ... Reception processing control unit
91 ... antenna
101 ... child electronic clock
118: child receiving unit
119 ... child time keeping section
121 ... child receiving antenna
124 ... child control circuit
φ1 ... External time data
φ2: Time correction signal
φ3: Time prediction correction signal
φ4: Internal correction time data

Claims (15)

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 comparing unit that compares the external time data that is the time information received by the external wireless information receiving unit and the internal time data that is timed by the internal time counting unit and outputs the difference amount,
A storage unit,
A reception control unit;
A transmission unit for transmitting internal data to the outside,
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 time 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 predicted correction amount,
The transmitting unit, the external wireless information receiving unit, when the external wireless information is effectively received, the time data based on the external time data, when the external wireless information was not received effectively, the predicted correction amount An electronic device, comprising: a transmission control unit configured to transmit, to the outside, internal correction time data whose internal time is corrected based on the internal time. The electronic device according to claim 1,
The reception control unit includes a reception schedule control unit that controls a reception schedule in the external wireless information reception unit,
The electronic device according to claim 1, wherein the internal time correction control unit corrects the internal time using the predicted correction amount when acquisition of the time information fails when the external wireless information is received based on a reception schedule. The electronic device according to claim 1 or 2,
The reception control unit includes a reception schedule control unit that controls a reception schedule in the external wireless information reception unit,
The internal time correction control unit, when the reception schedule is changed by the reception schedule control unit, but the reception is not performed while the reception time in the default reception schedule is used, the internal time is calculated using the predicted correction amount. An electronic device characterized by correction. The electronic device according to any one of claims 1 to 3,
With an external operation unit for instructing forced reception of external wireless information by the external wireless information receiving unit,
The internal time correction control unit, when forced reception is instructed by the user operating the external operation unit, when the acquisition of time information by receiving the external wireless information fails, the predicted correction amount An electronic device, wherein the internal time is adjusted by using the electronic device. The electronic device according to any one of claims 1 to 3,
Equipped with a magnetic field detection unit that detects electromagnetic noise,
An electronic device, comprising: a reception processing control unit configured to prohibit a reception operation in an external wireless information reception unit or invalidate received data when an electromagnetic noise is detected by the magnetic field detection unit. . The electronic device according to claim 5,
The reception control unit includes a reception schedule control unit that controls a reception schedule in the external wireless information reception unit,
When receiving external wireless information based on the reception schedule, the internal time correction control unit detects electromagnetic noise in the magnetic field detection unit and disables reception operation or invalidates received data by the reception processing control unit. An electronic device, wherein the internal time is corrected using the predicted correction amount when the acquisition of the time information fails due to the operation. In the electronic device according to claim 5 or 6,
With an external operation unit for instructing forced reception of external wireless information by the external wireless information receiving unit,
The internal time correction control unit, when forcible reception is instructed by the user operating the external operation unit, electromagnetic noise is detected by the magnetic field detection unit, and the reception processing control unit prohibits reception operation or An electronic device, wherein when the reception data is invalidated and acquisition of time information fails, the internal time is corrected using the predicted correction amount. The electronic device according to any one of claims 2, 3, and 6,
The reception schedule control unit may be configured to determine whether an average value of the time correction values per unit time obtained by the reception timing and the difference amount is smaller than or equal to a first set value for the average value, or / An electronic device that changes the reception schedule so that the reception interval is longer than the initial setting when the reception interval is smaller than the first set value. The electronic device according to claim 8,
The electronic device according to claim 1, wherein 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 default reception schedule at least once. The electronic device according to any one of claims 2, 3, 6, 8, and 9,
The reception schedule control unit may be configured to determine whether an average value of the time correction values per unit time obtained from the reception time and the amount of difference is greater than or equal to a second set value for the average value, and / or An electronic apparatus characterized by changing a reception schedule such that the reception interval is shorter than an initial setting when a value variation is greater than or equal to a second setting value for variation. The electronic device according to any one of claims 2, 3, 6, 8, 9, and 10,
The storage unit includes a reception schedule storage unit that stores a plurality of reception schedule information in the external wireless information reception unit,
The electronic device, wherein the reception schedule control unit controls a reception schedule by selecting reception schedule information in the reception schedule storage unit. The electronic device according to any one of claims 1 to 7,
The electronic device, wherein the internal time correction control unit corrects the internal time by using the predicted correction amount when the predicted correction amount calculated by the correction amount calculation unit is larger than or equal to the correction amount determination value. A transmission / reception system for an electronic device group including the electronic device according to any one of claims 1 to 12 as a parent electronic device and a child electronic device receiving transmission data transmitted from the parent electronic device,
The child electronic device,
A transmission unit for receiving the time data based on the external time data and the internal correction time data based on the predicted correction amount transmitted by the transmission unit of the parent electronic device, wherein system. An electronic device having an external wireless information receiving unit that receives external wireless information including time information, an internal time measuring unit that measures internal time based on a reference clock, and a transmitting unit that transmits internal data to the outside. A transmission / reception control method,
A time data comparing step of comparing the external time data, which is the time information received by the external wireless information receiving unit, and the internal time data measured by the internal time counting unit and outputting the difference amount;
A reception information storage 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,
A correction amount calculating step of calculating a predicted correction amount based on the plurality of reception timing data, difference amount data, and elapsed time since last reception;
When the external wireless information receiving unit receives the external wireless information effectively, the external wireless information receives the time data based on the external time data, and when the external wireless information is not effectively received, the internal time based on the predicted correction amount. A time data transmitting step of transmitting the internal correction time data to which the time is corrected to the outside,
A transmission / reception control method for an electronic device, comprising: An electronic device having an external wireless information receiving unit that receives external wireless information including time information, an internal time measuring unit that measures internal time based on a reference clock, and a transmitting unit that transmits internal data to the outside. A transmission / reception control method,
A time data comparing step of comparing the external time data, which is the time information received by the external wireless information receiving unit, and the internal time data measured by the internal time counting unit and outputting the difference amount;
A reception information storage 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,
A correction amount calculating step of calculating a predicted correction amount based on the plurality of reception timing data, difference amount data, and elapsed time since last reception;
A magnetic field detection step of detecting electromagnetic noise,
When the electromagnetic noise is detected in the magnetic field detection step, a reception control step of prohibiting the reception operation in the external wireless information reception unit or invalidating the reception data,
When the external wireless information receiving unit does not detect the magnetic field noise in the magnetic field detecting step and effectively receives the external wireless information, the time data based on the external time data is detected, and when the magnetic field noise is detected, the prediction correction is performed. Time data transmission step of transmitting the internal correction time data in which the internal time is corrected based on the amount, to the outside,
A transmission / reception control method for an electronic device, comprising:

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