JP2005003557A - Electronic device, control method of electronic device, its program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of reducing power consumption, and improving time indication accuracy. <P>SOLUTION: A radio wave correcting clock is equipped with an antenna 21 or a receiving circuit 22 for receiving external radio information including time information, a time counter 53 for clocking the internal time, or the like. In addition, a control circuit 24 of the clock is equipped with a comparison circuit 54 for comparing received external time data with internal time data and outputting the difference thereof, a received information storage part 58 for storing each data of a reception time of the external radio information and its difference, a predicted correction quantity calculation part 59 for calculating the predicted correction quantity by reception time data, the difference data and an elapsed time from the reception time in the preceding time, a determination part 57 for comparing a determination reference value based on the predicted correction quantity with the difference quantity, and a processing control part 56 for controlling based on a determination result by the determination part 57. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device typified by a radio-controlled timepiece that receives external wireless information including time information and corrects the time, and a control method, program, and recording medium for the electronic device.
[0002]
[Background]
There is known a radio-controlled timepiece that receives a long-wave standard radio wave on which time information is superimposed, corrects the difference from the time in the timepiece, and corrects the time.
In such a radio-controlled timepiece, if magnetic field noise occurs around the clock or inside the clock during reception, the noise may affect the standard radio wave, and the received data may not be reliable.
Considering the influence of such magnetic field noise, when the electromagnetic generator inside the watch that generates magnetic field noise generates power, the magnetic field noise has been affected by prohibiting reception or invalidating the received data. A technique for preventing the use of data has been developed (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-166071 A
[0004]
[Problems to be solved by the invention]
However, even if the electromagnetic generator is generating power, it may be possible to receive normal data depending on the strength of the radio wave and the reception state, but in the prior art, the data received while the generator is generating Since all of them are invalidated, data is not used while performing a reception operation, and power is wasted, and if the power generation state happens to overlap with the reception timing, the time correction is performed on the received data for a long time. There is a problem in that it is impossible to perform the operation and the time indication accuracy is lowered.
[0005]
In addition, the effect of magnetic field noise by the internal generator has been eliminated, but if the received magnetic data becomes inaccurate due to magnetic field noise outside the watch affecting the standard radio wave, the time is corrected with the received data. Therefore, the corrected time may be inaccurate.
Furthermore, there is a possibility that the received data may become inaccurate due to some abnormality other than magnetic field noise, such as a decrease in power supply voltage. In this case as well, there is a problem that the corrected time becomes inaccurate.
[0006]
Such a problem is a problem that occurs not only in electronic devices including a wristwatch or a clock-type radio-controlled clock, but also in various electronic devices that incorporate a radio-controlled clock function such as a mobile phone, an electronic toy, and a timer.
[0007]
In view of such a problem, the present invention is an electronic device that can suppress power consumption and can correct time accurately and improve time indication accuracy, a method for controlling the electronic device, a program thereof, An object is to provide a recording medium.
[0008]
[Means for Solving the Problems]
The electronic device of the present invention is received by the external wireless information receiving unit that receives external wireless information including time information, the internal time measuring unit that measures the internal time based on a reference clock, and the external wireless information receiving unit A time data comparison unit that compares the external time data that is time information and the internal time data that is timed by the internal time clock unit and outputs the difference, an internal time correction control unit that corrects the internal time, and Depending on the time when external wireless information was received by the external wireless information receiver and each data of the difference amount at that time, and the reception time data, difference data, and the elapsed time since the previous reception When the external time data is correct by comparing the prediction correction amount calculation unit for calculating the prediction correction amount with the judgment reference value set based on the prediction correction amount and the difference amount A determination unit that determines whether the data is data, and a processing control unit that controls the operation of at least one of the external wireless information reception unit and the internal time correction control unit based on a determination result of the determination unit, To do.
[0009]
In the present invention, when the external wireless information receiving unit receives the external wireless information, the received time information (external time data) is measured by the time data comparing unit based on a reference clock generated inside the electronic device. The difference amount is output by being compared with the internal time data, and the difference amount and reception time data are stored in the reception information storage unit.
Further, the prediction correction amount calculation unit calculates the prediction correction amount based on the reception timing data, the difference amount data, etc., and the determination unit compares the determination reference value set based on the prediction correction amount with the difference amount. Then, it is determined whether the external time data is correct time data.
Here, the determination reference value is normally set within a predetermined range having an upper limit value and a lower limit value. If the difference amount is within the determination reference value range, the external time data is determined to be correct. If it is outside the range of the determination reference value, the external time data may be determined to be incorrect.
Specifically, the determination reference value can be set as follows. For example, the prediction correction amount is calculated by multiplying a predetermined coefficient (for example, 1.0, 1.5, 2.0, etc.), the calculated value is set as the upper limit value or the lower limit value, and the sign of the value is changed. It is good also considering a thing as a lower limit or an upper limit. In this case, it can be determined whether the absolute value of the difference amount is equal to or less than the absolute value of the determination reference value (the absolute value of both the upper limit value and the lower limit value is the same).
The determination reference value can also be set within a predetermined range with the predicted correction amount as the center value. For example, the prediction correction amount is multiplied by a predetermined coefficient (for example, 1.0, 1.5, 2.0, etc.) to obtain a calculated value, and the absolute value of (calculated value−prediction correction amount) is calculated as the prediction correction amount. The upper limit value and the lower limit value may be set by plus or minus the amount.
Further, as the determination reference value, a calculated value is obtained by multiplying the predicted correction amount by a predetermined coefficient (for example, 1.0, 1.5, 2.0, etc.), and this calculated value is calculated as an upper limit value (the calculated value is It may be set to a positive value) or a lower limit value (when the calculated value is a negative value), and “0 (zero)” may be set as the lower limit value or the upper limit value.
[0010]
If the difference amount is small within the range of the judgment reference value based on the predicted correction amount, the difference amount, that is, the reception time data is almost the actual time data corrected with the internal time measured by the internal time counter or the predicted correction amount. The time data is very close. Here, considering that the accuracy of a general quartz clock in recent years is 20 seconds or less per month (1 second or less per day), when the received time data is close to the internal time, The time data represents the correct time.
Therefore, it is possible to verify whether the reception time data is correct time data by comparing the difference amount with the determination reference value. For this reason, compared with the prior art in which if the reception time data for a plurality of frames is not received, it is not possible to verify whether the data is correct. Accordingly, the reception process can be shortened and the power consumption can be reduced.
Therefore, it is determined whether or not the reception time data is correct by comparing the difference amount with the determination reference value, and only when it is determined that it is correct, the internal time correction is performed based on the difference amount, while suppressing power consumption. The time can be corrected to the correct time and the time indication accuracy can be improved. On the other hand, if it is determined by comparison between the difference amount and the determination reference value that the reception time data is not correct, re-reception or internal time correction based on the predicted correction amount instead of the difference amount may be performed. Compared with the case of correcting with an incorrect difference amount, the time can be corrected to a more accurate time and the time indication accuracy can be improved.
[0011]
Here, the determination reference value is a value within a predetermined range having an upper limit value and a lower limit value, and the processing control unit is configured to output the internal time correction control unit when the difference amount is within the determination reference value range. It is preferable to have an internal time correction instruction unit for correcting the internal time based on the difference amount.
If the difference amount is within the range of the determination reference value, the reception time data can be determined as correct data. Therefore, even when reception time data for only one frame is received, the data can be verified, the reception time can be shortened and power can be saved, and the time can be corrected to the correct time. Can be improved.
[0012]
In addition, the determination reference value is a value within a predetermined range having an upper limit value and a lower limit value, and the processing control unit, when the difference amount is outside the determination reference value range, It is preferable to have a re-reception control unit that instructs re-reception.
When the difference amount is outside the range of the determination reference value, the reception time data can be determined as incorrect data affected by noise or the like. For this reason, by performing re-reception in the re-reception control unit, correct time data can be acquired and accurate time display can be performed.
[0013]
Furthermore, it is preferable to have a prediction correction amount correction control unit that, when the difference amount is outside the range of the determination reference value, causes the internal time correction control unit to correct the internal time based on the prediction correction amount. .
If the internal time is corrected with the predicted correction amount when the difference amount is outside the judgment reference value range and the reception time data is determined to be incorrect, the internal time can be corrected even when external radio information cannot be received. Generation of time deviation can be suppressed, and time indication accuracy can be improved.
[0014]
The processing control unit may perform re-reception a predetermined number of times with a re-reception control unit that instructs the external wireless information reception unit to perform re-reception when the difference amount is outside the range of the determination reference value. It is preferable to include a prediction correction amount correction control unit that causes the internal time correction control unit to correct the internal time based on the prediction correction amount when the difference amount is outside the range of the determination reference value.
In the present invention, when the difference amount is outside the range of the determination reference value, first, re-reception processing is performed. When the difference amount is outside the range of the determination reference value even in the re-reception processing, based on the predicted correction amount Since the internal time is corrected, if the correct time data can be received by re-receiving, it is possible to give a more accurate time indication, and the correct time data can be received even if re-receiving due to the influence of an external magnetic field, etc. If it is not possible, the re-reception process is terminated at a predetermined number of times and the time is corrected based on the predicted correction amount, so that unnecessary reception processing can be prevented from being continued, power consumption can be reduced, and time indication accuracy can be improved.
[0015]
It is preferable that the determination reference value is set as an upper limit value or a lower limit value by multiplying the prediction correction amount by a predetermined coefficient. Normally, if the predicted correction amount is a positive value, the value multiplied by the predetermined coefficient is an upper limit value, and if it is a negative value, it is a lower limit value.
If the received time data contains noise, the difference (the difference between the received time data and the internal time data) is usually very large, and may vary from minutes to tens of minutes or even hours. sell. On the other hand, when the reception time data is correct, the amount of difference is usually very small, within 1 to several seconds. Therefore, the determination reference value does not need to be the same as the predicted correction amount, and can be sufficiently determined even if it is about 2 to 3 times the predicted correction amount. And by setting a criterion value in anticipation of a certain margin (margin), it can be prevented from being erroneously judged because the criterion value is small despite the fact that the received data is actually correct, Accurate judgment can be made.
[0016]
Here, it is preferable to have a determination reference value setting unit for setting the predetermined coefficient. If the determination reference value setting unit is provided, the user or the like can adjust the magnification (predetermined coefficient) according to the reception status and the like, and can perform appropriate control.
[0017]
An electronic device 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 counter that measures an internal time based on a reference clock, and the internal time is corrected. A method of controlling an electronic device having an internal time correction control unit that compares external time data that is time information received by the external radio information reception unit and internal time data that is timed by the internal time clock unit. A time data comparison step for outputting the difference amount, a reception information storage step for storing each data of the time when the external wireless information is received by the external wireless information receiving unit and the difference amount at that time, and the reception time data A prediction correction amount calculation step for calculating a prediction correction amount based on the difference amount data and the elapsed time from the previous reception, and a judgment reference value set based on the prediction correction amount. And determining whether the external time data is correct time data by comparing the difference amounts, and at least one of the external wireless information receiving unit and the internal time correction control unit based on a determination result of the determination step And a process control step for controlling the operation.
[0018]
In the present invention, when the external wireless information is received by the external wireless information receiving unit, the received time information is the time data comparison step, and the internal time data measured based on the reference clock created inside the electronic device. The difference amount is output by comparison, and each data of the difference amount and the reception time is stored in the reception information storing step.
Furthermore, in the prediction correction amount calculation step, the prediction correction amount is calculated based on the received data, and in the determination step, the determination reference value set based on the prediction correction amount is compared with the difference amount. It is possible to verify whether the time data is accurate. Therefore, by performing predetermined processing such as reception processing and time correction processing based on the result, accurate time correction can be performed and power consumption can be reduced.
[0019]
A program according to the present invention is a program for causing a computer incorporated in an electronic device to execute the control method.
The recording medium of the present invention is a recording medium readable by a computer that records the program.
In each of these inventions, the same operational effects as the electronic device and the control method of the electronic device described above can be obtained.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 shows a circuit configuration of a radio-controlled timepiece 1 according to the first embodiment, and FIG. 2 shows a circuit configuration of a main part thereof.
The radio-controlled timepiece 1 is an antenna 21 that receives a long-wave standard radio wave (external wireless 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). Each receiving circuit 22, a data storage circuit 23 for storing time information output from the receiving circuit 22, a control circuit 24, a display driving circuit 25 for controlling driving of a display unit 28 for displaying time, and each circuit. The power supply 27 includes a battery to be driven and the like, and a display unit 28 including a pointer 28A such as an hour hand, a minute hand and a second hand, and a wheel train 28B and a motor 28C for driving the pointer 28A.
[0021]
The antenna 21 is configured by a ferrite antenna or the like in which a coil is wound around a ferrite rod.
The receiving circuit 22 includes an amplifying circuit, a bandpass filter, a demodulating circuit, a decoding circuit, and the like (not shown), extracts time information (time code) composed of digital data from the received radio wave and stores it in the data storage circuit 23.
Accordingly, the antenna 21, the receiving circuit 22 and the data storage circuit 23 constitute an external wireless information receiving unit.
[0022]
The time information stored in the data storage circuit 23 is processed by the control circuit 24. The configuration of the control circuit 24 is shown in FIG.
The control circuit 24 includes an oscillation circuit 51, a frequency dividing circuit 52, a time counter 53, a comparison circuit 54, an internal time correction control unit 55, a processing control unit 56, a determination unit 57, a reception information storage unit 58, and a predicted correction amount calculation unit 59. , A determination reference value creation unit 60, a determination reference value setting unit 61, a reception schedule control unit 62, and an external reception operation unit 63.
The processing control unit 56 includes a re-reception control unit 71 and an internal time correction instruction unit 72.
[0023]
The oscillation circuit 51 oscillates a reference oscillation source 50 such as a crystal resonator at a high frequency, and the frequency dividing circuit 52 divides the oscillation signal and outputs it as a predetermined reference signal (a reference clock, for example, a signal of 1 Hz). . The time counter 53 counts this reference signal and measures the current time (internal time data). Accordingly, the oscillation circuit 51, the frequency dividing circuit 52, and the time counter 53 constitute an internal time counter that measures the internal time. Each time the time counter 53 counts up, a drive signal is output to the display drive circuit 25 to drive the display unit 28 including the hands 28A, the train wheel 28B, and the stepping motor 28C.
Here, the position of the hand 28A, that is, the time pointed by the hand 28A (internal time data) is detected by the value of the time counter 53.
[0024]
The comparison circuit 54 is configured to be able to determine whether the time information (external time data) stored in the data storage circuit 23 is correct time data. A difference amount from the internal time data (current time data) is output. Therefore, the comparison circuit 54 constitutes a time data comparison unit.
As a method for determining whether or not the received time information is accurate, various methods used in conventional radio-controlled timepieces can be employed. For example, if there is a non-existing time or day, such as 68 minutes, and each time data represents an expected time, that is, if it is time data received continuously, Therefore, a method for confirming whether the time data is accurate from the point of whether each data is such time can be adopted.
In this embodiment, the output data of the time counter 53 is used as the internal time data. However, as shown by the dotted lines from the train wheel 28B and the hands 28A in FIG. 2, the predetermined gears of the train wheel 28B are used. A needle position detection circuit that directly detects the rotational position and the position of the pointer 28A may be provided, and the needle position data of this needle position detection circuit may be used.
However, the use of the output of the time counter 53 is advantageous in that it is not necessary to provide the hand position detection circuit 26 constituted by an optical sensor or the like, and the number of parts can be reduced.
[0025]
The internal time correction control unit 55 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 driving circuit 25. The internal time correction control unit 55 further stores each data of the difference amount and the time correction time, that is, the time when the external wireless information is received, in the reception information storage unit 58.
As shown in FIG. 3, the reception information storage unit 58 stores reception time and difference data from the latest reception time to the past seven times. Further, a time correction value (second / day) obtained by the difference amount (second) / reception interval (day) is also calculated and stored.
[0026]
The prediction correction amount calculation unit 59 calculates a prediction correction amount using a plurality of data stored in the reception information storage unit 58. For example, a regression equation such as a regression line is obtained from the data of seven difference amounts (time correction values) by the least square method or the like, and the predicted correction amount after a predetermined elapsed time from the latest reception time, for example, one day later, is used as the regression equation. Based on the calculation. For example, when the predicted correction amount (seconds) = 0.21 seconds / day × number of days, the predicted correction amount after one day is 0.21 seconds.
[0027]
The determination reference value creation unit 60 calculates a determination reference value based on the predicted correction amount. In the present embodiment, a predetermined range having an upper limit value and a lower limit value is obtained by calculating a value obtained by multiplying the predicted correction amount by at least one predetermined coefficient and adding or subtracting the difference between this value and the predicted correction amount to the predicted correction amount. The criterion value is set. In other words, as will be described later, since the determination reference value is for generally determining whether or not the reception time data is correct, strictness is not required. For this reason, an upper limit value or a lower limit value is set by multiplying the prediction correction amount by a predetermined coefficient (for example, one or more values of 1.0, 1.5, 2.0, 2.5, etc.), and the prediction The correction amount is set as the center value. For example, for example, when the prediction correction amount is 0.2 seconds and the predetermined coefficient is 1.5, the upper limit value of the determination reference value is 0.2 seconds × 1.5 = 0.3 seconds, and the lower limit The value is 0.2 seconds− (0.3 seconds−0.2 seconds) = 0.1 seconds, with a predicted correction amount of 0.2 seconds as a center value, and a range from 0.3 seconds to 0.1 seconds. Becomes the criterion value. Further, for example, when the predicted correction amount is −0.2 seconds and the predetermined coefficient is 1.5, the lower limit value of the determination reference value is −0.2 seconds × 1.5 = −0.3 seconds, The upper limit value is −0.2 seconds − (− 0.3 seconds + 0.2 seconds) = − 0.1 seconds, with the predicted correction amount −0.2 seconds as the center value, and from −0.1 seconds to − A range of 0.3 seconds is a criterion value.
[0028]
The determination reference value setting unit 61 is configured to be able to arbitrarily set the predetermined coefficient (magnification) in accordance with a user operation. At this time, the predetermined coefficient may be selected from preset ones or may be directly input by the user. Therefore, for example, if the coefficient prediction correction amount is 0.20 seconds and the predetermined coefficient is 1.5, as described above, the determination reference value is 0.30 seconds to 0.1 seconds, and the prediction correction amount is 0.10. If the predetermined coefficient is 2.0, the determination reference value is 0.20 seconds to 0.0 seconds. If the prediction correction amount is 0.15 and the predetermined coefficient is 2.5, the determination reference value is 0. 375 seconds to -0.075 seconds.
[0029]
The determination unit 57 compares the difference amount output from the comparison circuit 54 with the determination reference value output from the determination reference value creation unit 60, and outputs the determination result signal to the processing control unit 56. Specifically, the determination unit 57 determines whether the difference amount is within or outside the range of the determination reference value, and outputs the result.
[0030]
The process control unit 56 operates the re-reception control unit 71 when the determination unit 57 outputs a signal indicating that the difference amount is outside the range of the determination reference value. That is, since the difference amount (the time difference between the reception time data and the internal time data) is large outside the range of the determination reference value, there is a high possibility that the reception time data includes noise, so that a new radio wave is received again. Because.
For this reason, the re-reception control unit 71 operates the reception circuit 22 and executes a re-reception process of standard radio waves. Note that the difference amount deviates significantly from the predicted correction amount. For example, the difference amount is not included because the radio-controlled timepiece is under an external magnetic field or there is a problem with the reception time data such as incomplete reception when the power is low. There is a possibility. Therefore, it is preferable to start the reception operation after a predetermined time (for example, 1 hour) has elapsed since the previous reception.
As a result of re-reception by the re-reception control unit 71, the process control unit 56 operates the re-reception control unit 71 again to execute the re-reception process when the difference amount is out of the determination reference value range again. If the difference amount does not fall within the determination reference value even after repeating this re-reception process a plurality of times, the process control unit 56 stops the operation of the re-reception control unit 71, that is, the reception circuit 22. In this case, reception by the reception circuit 22 is stopped until reception processing is instructed by the reception schedule control unit 62 or until a user instructs reception processing by the external reception operation unit 63.
[0031]
On the other hand, when the signal indicating that the difference amount is within the determination reference value is output from the determination unit 57, the processing control unit 56 operates the internal time correction instruction unit 72. That is, if the difference amount (the time difference between the reception time data and the internal time data) is small within the range of the determination reference value, it can be estimated that the reception time data is correct, so if the time is corrected based on the reception time data Good. Therefore, the internal time correction instruction unit 72 operates the internal time correction control unit 55, and the internal time correction control unit 55 corrects the internal time data of the time counter 53 according to the difference amount, and converts the internal time data into the reception time. Match the data.
[0032]
The reception schedule control unit 62 manages a reception processing schedule for periodically operating the reception circuit 22 and causes the reception circuit 22 to execute reception processing.
Note that the reception schedule control unit 62 normally controls the reception circuit 22 to execute radio wave reception once a day, for example, at 2:00 am. For example, as shown in FIG. The reception schedule may be set, and the reception schedule may be switched and executed according to the user's instruction, the amount of difference, or the like.
[0033]
The external reception operation unit 63 is provided so that the user can forcibly execute the radio wave reception process. For example, when a crown, a predetermined button, or the like is operated, the reception circuit 22 is activated, and the radio wave reception process is executed regardless of the reception schedule. Note that, even after forced reception by the external reception operation unit 63, control by the processing control unit 56 is executed based on the determination by the determination unit 57, similarly to after reception processing by the reception schedule control unit 62.
[0034]
The operation of the radio-controlled timepiece 1 having such a configuration will be described with reference to the flowcharts of FIGS.
The control circuit 24 measures the current time by counting a reference clock of 1 Hz or the like output via the oscillation circuit 51 and the frequency dividing circuit 52 with the time counter 53 in a normal time. As the counter value of the time counter 53 changes, a driving pulse is output from the display driving circuit 25 to the stepping motor 28C of the display unit 28, and each pointer 28A is activated.
[0035]
Further, when the reception schedule control unit 62 of the control circuit 24 starts to operate, first, a variable N1 indicating the number of receptions is set to an initial value 0 (step 1, hereinafter “step” is abbreviated as “S”).
Next, the reception schedule control unit 62 determines whether there is an instruction for forced reception by the external reception operation unit 63 (S2). If there is no instruction for forced reception, it is determined whether or not the reception time has been reached (S3).
For example, when a schedule for receiving processing at 2:00 am is set once a day, the receiving schedule control unit 62 determines whether or not the receiving time at which internal time data is set, for example, 2:00 am (S3). When the reception time has been reached, the reception schedule control unit 62 drives the reception circuit 22 to perform radio wave reception processing (S4).
[0036]
When the receiving circuit 22 is activated, 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 62 operates the reception circuit 22 for about 3 minutes and receives time information for 3 frames, the reception schedule control unit 62 stops the reception circuit 22.
Then, the comparison circuit 54 checks whether or not the time information stored in the data storage circuit 23 is accurate time data, and determines whether or not the reception is successful (S5).
[0037]
When it is determined that the reception is successful in S 5, the comparison circuit 54 calculates the difference between the received time information and the internal time data (current time) counted by the time counter 53 and outputs the difference to the internal time correction control unit 55. To do.
The internal time correction control unit 55 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).
[0038]
Further, the internal time correction control unit 55 stores the difference amount, that is, time correction amount data, and the reception time, that is, correction time data, in the reception information storage unit 58 (S7).
Then, since the first reception is performed, the control circuit 24 adds 1 to the number of receptions N1 (S8), and determines whether or not the number of receptions N1 is a set number, which is 7 or more in this embodiment. (S9). The number of times of setting may be set as a fixed value in advance, or may be changed as appropriate by the user. Furthermore, the set number of times is not limited to seven, but may be one, may be 2 to 6, and may be 8 or more.
[0039]
If N1 is less than 7 times in S9 or if the comparison circuit 54 determines that reception has failed in S5, is there a forced reception (S2), waits until the reception time is reached (S3), forced reception Is repeated or when the reception time comes, the above processes S4 to S9 are repeated.
On the other hand, when it is determined in S9 that the number of receptions N1 is 7 or more, the control circuit 24 causes the prediction correction amount calculation unit 59 to execute a prediction correction amount calculation process (S10), and further, a determination reference value generation unit The determination reference value calculation process is executed at 60 (S11).
Then, the initial reception control process after the start of operation shown in FIG. 5 is terminated, and the normal reception control process shown in FIG. 6 is executed.
[0040]
The normal reception control process is executed based on the flowchart shown in FIG. First, the reception schedule control unit 62 determines whether or not the reception time has been reached (S21).
Here, when the reception time is reached, the reception schedule control unit 62 operates the reception circuit 22 to perform reception (S22). At this time, three frames are received in the reception process (S4) of FIG. 5, but one frame is received in this reception process (S22). That is, in the reception process of S4, a plurality of data is received and compared in order to determine whether the reception data is correct. However, in the reception process of S22, the reception data can be evaluated using the determination reference value. Therefore, it is only necessary to receive one frame.
However, in the reception process of S22, a plurality of frames may be received, and a double check of comparison between the frame data and comparison with the determination reference value may be performed. In this case, it can be determined more strictly whether the received data is accurate.
[0041]
When the receiving circuit 22 is activated, 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 62 operates the reception circuit 22 for about one minute and receives time information for one frame, the reception schedule control unit 62 stops the reception circuit 22.
Then, the comparison circuit 54 calculates a difference amount (seconds) between the received time information and the internal time data (current time) counted by the time counter 53, and outputs the difference (second) to the determination unit 57 (S23). The difference amount is also output to the internal time adjustment control unit 55, but the internal time adjustment control unit 55 is controlled not to perform time adjustment until an instruction is received from the internal time adjustment instruction unit 72.
[0042]
The determination unit 57 compares the determination reference value (seconds) calculated in S11 with the difference amount (seconds) (S24).
Here, when a signal indicating that the difference amount is not between the upper limit value and the lower limit value of the determination reference value, that is, out of the determination reference value range, is output from the determination unit 57 to the process control unit 56. The unit 56 operates the re-reception control unit 71 and instructs re-reception processing.
The re-reception control unit 71 waits for a predetermined time (S25), and then instructs the reception circuit 22 to receive radio waves (S22).
Thereafter, S23 to S24 are performed, and the re-reception is repeated until the difference amount, that is, the received data is within the range of the determination reference value.
[0043]
On the other hand, when the signal indicating that the difference amount is within the determination reference value range is output from the determination unit 57 to the processing control unit 56, the internal time correction instruction unit 72 causes the internal time correction control unit 55 to correct the time. The internal time correction control unit 55 corrects the internal time data of the time counter 53 using the difference amount (S26), and moves the pointer 28A of the display unit 28 via the display drive circuit 25 to display the current time. It corrects (S27).
Further, the internal time correction control unit 55 stores the difference amount, that is, time correction amount data, and the reception time, that is, correction time data, in the reception information storage unit 58 (S28), and calculates a predicted correction amount (S29). The determination reference value calculation process (S30) is sequentially executed to obtain a determination reference value to be used at the next reception.
The normal reception control process is executed by sequentially repeating the processes of S21 to S29.
[0044]
Note that the number of data stored in the reception information storage unit 58 stores all the data successfully received from the start time, and uses the latest seven data among them to set the time correction value (second / day). The average value etc.) may be obtained, but from the viewpoint of storage capacity, only 7 data are always stored, and when new data is stored, the oldest data is deleted. Good. Therefore, the average value of the time correction values is an average value based on the time correction values when the reception is successful, and does not include the predicted correction amount.
[0045]
Next, specific processing in this embodiment will be described with reference to FIG.
The received data is a time correction value (seconds / day) as shown in FIG. 7 (1), and the average value of the time correction values for the seven days on which the reception and correction from the first to the seventh day are performed is about 0. 0. In the case of 21 seconds / day, the predicted correction amount on the eighth day can be predicted as 0.21 seconds / day × 1 day = 0.21 seconds. Then, an upper limit value or a lower limit value of the determination reference value (second) is obtained by multiplying the predicted correction amount by a predetermined coefficient, for example, 1.5. In this example, since the predicted correction amount is a positive value, the upper limit value of the determination reference value is 0.315 seconds, and the lower limit value is 0.105 seconds. That is, the determination reference value is 0.21 seconds ± 0.105 seconds.
In this state, when the standard radio wave is received on the 8th day based on the reception schedule and the difference amount is 0.20 seconds, the difference amount is within the determination reference value range, and the received time data is the internal time. Since the time data is close to the data, it can be determined that the received data is correct. Therefore, the correct time can be corrected by correcting the internal time data with a difference amount of 0.20 seconds based on the received data.
Then, the difference amount and the reception timing data based on the data received at the eighth time are stored in the reception information storage unit 58, and the predicted correction amount and the determination for the ninth day are determined based on the above-mentioned data for the latest two to eight times. A new reference value is calculated. Since the difference amount based on the data received on the ninth day is within the range of the determination reference value, the internal time data is corrected with the difference amount. Similar processing is performed to correct the internal time data from the 10th day to the 15th day.
[0046]
On the other hand, for the 16th day, the average value of the time correction values (seconds / day) of the latest 7 times (from the 9th day to the 15th day) is 0.22 seconds / day. The correction amount is 0.22 seconds / day × 1 day = 0.22 seconds, the upper limit value of the determination reference value is 0.22 seconds × 1.5 = 0.33 seconds, and the lower limit value is 0.11 seconds. On the other hand, the difference amount based on the received data on the 16th day is 0.37 seconds (time correction value is 0.37 seconds / day). Therefore, since the difference amount is outside the range of the determination reference value, it can be determined that the received data is wrong. Therefore, the internal time data is not corrected with the difference amount based on the received data. For this reason, when the time data is re-received by the re-reception control unit 71 and the difference amount of the re-reception time data is within the range of the determination reference value, the reception data that can reduce the influence of noise is used. Can be corrected to the correct time.
On the 17th day, if the difference amount falls within the range of the criterion value as a result of re-reception on the 16th day, the difference amount is adopted, and the difference amount (time correction value) of the past 7 days is adopted as described above. The received data is evaluated and judged using the judgment reference value based on the predicted correction amount obtained from the average value.
If reception is performed in one day, the predicted correction amount is 0.44 seconds obtained by multiplying the average value of time correction values (0.22 seconds / day) by two days. Accordingly, the determination reference value is in the range of 0.66 seconds to 0.22 seconds. If the difference amount at the time of reception is within the above range, the time is corrected with the difference amount, and if it is out of the range, the re-receiving process is performed. Done.
[0047]
Here, in the graph of FIG. 7, “●” indicates a time correction value obtained by comparing the reception time and the internal time on each day when the initial reception processing and correction for receiving three frames are performed. . The “Δ” mark indicates a time correction value when it is determined that the correction is made within the determination reference value range. The “x” mark indicates a case where the re-reception process is performed because the difference amount of the received data is outside the determination reference value range. Note that when receiving once a day, the value of the time correction value (seconds / day) matches the difference amount (seconds), so the data value in FIG. 7 is the difference amount value. Can also be considered.
[0048]
Also, as shown in FIG. 7 (2), each time correction value shows a substantially constant tendency, and the predicted correction amount and the reception time also when the regression equation (regression line 100 or the like) is substantially along. If the data difference amount is within the determination reference value (B1), that is, the difference amount is within the range B centered on the predicted correction amount, the time data can be determined to be correct, and therefore the difference based on the received data. The time is adjusted according to the amount. On the other hand, when the difference amount exceeds the determination reference value, re-reception processing may be performed.
[0049]
According to this embodiment, there are the following effects.
(1) In this embodiment, the determination reference value is calculated based on the prediction correction amount calculated by the prediction correction amount calculation unit 59, and the difference between the determination reference value and the reception time data is compared. Whether or not the reception time data is correct can be easily and accurately performed. For example, in the conventional case, data for 3 frames (3 minutes) must be received, whereas in this embodiment, reception of 3 frames is necessary only for the first seven times, but thereafter, 1 frame is received. Only data reception for one frame (one minute) is sufficient, and reception processing can be performed in a short time, thereby reducing power consumption.
In addition, the time indication accuracy can be improved because the time adjustment based on the difference amount is performed only when the difference amount is within the range of the determination reference value, that is, when correct time data can be received. Therefore, it is possible to simultaneously achieve technical effects that are difficult to achieve both reduction in power consumption and improvement in time indication accuracy.
[0050]
(2) Furthermore, when the difference amount is outside the range of the determination reference value, the process control unit 56 performs the reception process again and repeats the re-reception process until appropriate data can be received. Can be reliably received, and a highly accurate time instruction can be performed.
Also, in the case of this re-receiving process, when waiting for a predetermined time and performing the re-receiving process after the set time has elapsed, the correct time data could not be received because it was temporarily in a place where the influence of the external magnetic field was strong However, after a certain period of time has passed, there is a high possibility that the user has moved from the place, and there is a high possibility that correct data can be received during the next reception process. For this reason, by waiting for a certain time, the number of times the re-reception process is repeated can be reduced, and power saving can be achieved.
[0051]
(3) Since the prediction correction amount, that is, the determination reference value is calculated based on the reception timing data and the difference amount data obtained by a plurality of reception processes, the determination is made only by the data at the time of one reception. Compared to the case of calculating the reference value, the determination reference value can be made more accurate, and a highly accurate determination can be performed.
[0052]
[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 is omitted.
[0053]
As shown in FIG. 8, the radio-controlled timepiece 1 of the second embodiment is different from the configuration of the first embodiment only in that a prediction correction amount correction control unit 73 is provided instead of the re-reception control unit 71. Other configurations are the same as those in the first embodiment.
The prediction correction amount correction control unit 73 controls the internal time correction control unit 55 to correct the internal time data of the time counter 53 based on the prediction correction amount data calculated and transmitted by the prediction correction amount calculation unit 59. To do.
Therefore, in the second embodiment, after the initial reception control process shown in FIG. 5 is performed, the normal reception control process shown in FIG. 9 is performed. Then, as shown in the flowchart of FIG. 9, if the difference amount is within the range of the determination reference value, the internal time correction control unit 55 is in response to an instruction from the internal time correction instruction unit 72 as in the first embodiment. The internal time data of the time counter 53 is corrected based on the difference amount (S26).
On the other hand, when the difference amount is outside the range of the determination reference value, the re-reception process is not performed, and the internal time correction control unit 55 determines the time based on the prediction correction amount according to an instruction from the prediction correction amount correction control unit 73. The internal time data of the counter 53 is corrected (S31). Other processes are the same as those in the first embodiment shown in FIG.
[0054]
In this embodiment, the same effects as (1) and (3) of the first embodiment can be obtained, and the following effects are also obtained.
(4) When the difference amount is outside the range of the determination reference value, the data of the time counter 53 is corrected with the predicted correction amount without performing the re-reception process, so that it is consumed as compared with the case where the re-reception process is performed. Power can be reduced.
[0055]
[Third Embodiment]
A third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the same or similar components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.
[0056]
As shown in FIG. 10, the radio-controlled timepiece 1 of the third embodiment is a combination of the first and second embodiments. The processing control unit 56 includes a re-reception control unit 71, an internal time correction. An instruction unit 72 and a predicted correction amount correction control unit 73 are provided.
In this embodiment, after performing the initial reception control process shown in FIG. 5, the normal reception control process shown in FIG. 11 is performed. In this normal reception control process, as shown in FIG. 11, when the reception time is reached (S21), a variable N2 indicating the number of re-receptions is initialized (set to 0) (S34), and the reception process (S22), The difference amount is calculated (S23), and it is determined whether the difference amount is within the determination reference value (S24). If the difference amount is outside the range of the determination reference value, it is determined whether N2 is greater than 1 (S35). At first, since N2 = 0, 1 is added to N2, and N2 becomes 1 (S36). After waiting for a predetermined time (S25), re-reception (S22) is executed. That is, re-reception processing is executed by the re-reception control unit 71 (S35 to S22). If this re-reception process is repeated a predetermined number of times (once or about 2 to 5 times, twice in the present embodiment), if the difference amount does not fall within the determination reference value range (S24), N2 is 2. Therefore, Yes is determined in S35. That is, since it is considered difficult to receive at the place, the time correction process based on the predicted correction amount by the predicted correction amount correction control unit 73 is performed without performing the re-receiving process (S31). As described above, in order to count the number of re-reception processes, after the process of S21, the variable N2 indicating the number of re-receptions is initialized (set to 0) (S34) and the re-reception process is performed. N2 is incremented by 1 (S36), and the number of times is determined in S35.
[0057]
According to the present embodiment as described above, the effects of the first and second embodiments can be achieved. That is, when the difference amount is outside the range of the determination reference value, first, when the re-reception process is attempted and the correct time data is received, the correct data cannot be received even if the re-reception process is performed twice. Since the time correction is performed with the predicted correction amount, there is no need to continuously repeat the re-receiving process, and it is efficient. If correct time data can be received by the re-receiving process, the time is corrected using that data. Therefore, the time indication accuracy can be improved compared to the case where the time is corrected with the predicted correction amount from the beginning.
[0058]
It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
In the embodiment, the reception time data for one frame and the determination reference value are compared. However, the reception time data for a plurality of frames and the determination reference value may be compared. When data of a plurality of frames is received, in addition to data verification based on these data, verification can be performed by comparison with a determination reference value. Therefore, it is possible to double check whether received data is correct data and high accuracy. Judgment can be made.
[0059]
Moreover, in the said embodiment, although the difference amount and the prediction correction amount (judgment reference value) were compared without converting into the fluctuation amount per day, the difference amount and the prediction correction amount (judgment reference value) are set to 1. You may compare by converting into the fluctuation amount per day. That is, in the above embodiment, since the reception is performed once a day, the difference amount and the prediction correction amount are the same as the fluctuation amount per day. For example, when the reception interval is changed, the reception interval is changed. Based on the above, it may be converted into a daily fluctuation amount and compared.
Further, in the embodiment, the upper limit value or the lower limit value of the determination reference value is calculated by multiplying the prediction correction amount by a predetermined coefficient. However, the upper limit value and the lower limit value are set by adding or subtracting the predetermined value to the prediction correction amount. May be. For example, an allowable value may be set according to the accuracy of the crystal resonator, and the allowable value may be added to or subtracted from the predicted correction amount to set the range of the determination reference value. In this way, when a range is set by adding or subtracting a certain constant value to the predicted correction amount, it is easier to process the difference amount or the predicted correction amount when converted to the fluctuation amount per day. preferable.
[0060]
Furthermore, in the above-described embodiment, data for one frame is received. However, when receiving processing is performed, a prediction correction amount is calculated and a received data unit is selected according to the prediction correction amount. Good.
For example, when the daily reception time is set to 2:30 am, when the first reference value is set to 0.2 seconds / day and the second reference value is set to 0.35 seconds / day, If the predicted correction amount (converted value per day) is 0.2 seconds / day or less, only the second time data is received, and the predicted correction amount is larger than 0.2 seconds / day, 0.35 seconds / If the time is less than the day, the second time data and the minute time data are received. If the predicted correction amount is larger than 0.35 seconds / day, the time data (second, minute, hour, day, etc.) of the entire frame. ) May be received.
Specifically, in FIG. 2, FIG. 8, and FIG. 10, the reception control unit is provided in the processing control unit 56, the predicted correction amount is acquired from the predicted correction amount calculation unit 59, and the predicted correction amount is set as described above. Based on the reference value, a reception unit such as second time data, minute time data, hour time data, and calendar time data is selected, and a reception unit control signal associated with the selected reception unit is sent to the reception circuit 22. The reception is performed based on the reception unit.
In this way, when the prediction correction amount is small, the reception data amount can be reduced, the reception time can be shortened, and the power during reception can be reduced.
[0061]
In each of the above embodiments, control is performed based on comparison with the determination reference value, which is a feature of the present invention, after first receiving radio waves seven times. However, the determination in S9 in FIG. Instead, for example, the reception process shown in FIGS. 6, 9, and 11 may be executed only by receiving the radio wave three times as shown in FIG. In short, it is only necessary to use the reception time data and difference data obtained by receiving radio waves at least several times.
In addition, the number of data for which the prediction correction amount is obtained may be varied depending on the difference amount or the like. For example, as shown in FIG. 12 (3), when the time correction value (difference amount converted per day) is constant at 0.1 second / day, the timekeeping process of the clock is also stable. Therefore, information necessary for calculating the predicted correction amount can be obtained even when the number of times is as small as about three. Therefore, if the difference amount is the same, the reception processing control using the predicted correction amount (judgment reference value) is performed three times, and if the time correction value is not constant, it is performed with more data such as seven times. It may be.
Note that the number of data for obtaining the predicted correction amount is preferably plural in terms of improving accuracy, but may be calculated based on one piece of received data.
[0062]
Also, as shown in FIG. 12 (4), two determination reference values (range A1, A2) based on the predicted correction amount are set, and if the difference amount is outside the range of the large determination reference value A2, it is repeated. One of reception processing or time correction with a predicted correction amount is performed, and when the difference amount is outside the range of the determination reference value A1 and within the range of the determination reference value A2, the other processing is performed to determine the determination reference value A1. If the difference is within the range, the time correction processing based on the difference amount may be performed.
[0063]
Further, the determination reference value may be set as follows in addition to the setting as in the above embodiment. For example, the determination reference value is calculated by multiplying the predicted correction amount by a predetermined coefficient (for example, 1.0, 1.5, 2.0, etc.), and this calculated value is set as the upper limit value or the lower limit value. What changed the sign of the value may be the lower limit value or the upper limit value. For example, if the predicted correction amount is 0.24 seconds and the predetermined coefficient is 1.5, the determination reference value is 0.36 seconds to -0.36 seconds. Similarly, if the predicted correction amount is −0.16 seconds and the predetermined coefficient is 1.5, the determination reference value is 0.24 seconds to −0.24 seconds. In this case, whether the absolute value of the difference amount is equal to or less than the absolute value of the determination reference value (the absolute value of both the upper limit value and the lower limit value is the same) or is within the range of the determination reference value It can be determined whether or not.
Further, as the determination reference value, a calculated value is obtained by multiplying the predicted correction amount by a predetermined coefficient (for example, 1.0, 1.5, 2.0, etc.), and this calculated value is calculated as an upper limit value (the calculated value is It may be set to a positive value) or a lower limit value (when the calculated value is a negative value), and “0 (zero)” may be set as the lower limit value or the upper limit value. For example, if the predicted correction amount is 0.24 seconds and the predetermined coefficient is 1.5, the determination reference value is 0.36 seconds to 0 seconds. Similarly, if the predicted correction amount is −0.16 seconds and the predetermined coefficient is 1.5, the determination reference value is 0 seconds to −0.24 seconds.
Moreover, in the said embodiment, although prediction correction amount was made into the center value, you may shift and set a center value. That is, the difference between the upper limit value and the predicted correction value may be different from the difference between the predicted correction value and the lower limit value. For example, when the tendency of the error of the internal time data can be predicted to be one direction in the forward direction or the lag direction, such as when the voltage value of the internal power supply is reduced, an upper limit value is set for the predicted correction value. The lower limit may be adjusted by increasing the range on one side and narrowing the other.
[0064]
Each determination reference value may be changed in consideration of seasonal variation. In particular, crystal resonators and the like have strictly temperature characteristics, so that the timekeeping accuracy is slightly different when the external temperature is different such as in summer and winter. Therefore, since the tendency of the time correction value may vary depending on the season, if the determination reference value is set in consideration of these, control with higher accuracy can be performed.
In the embodiment, the determination reference value setting unit 61 is provided so that the determination reference value can be freely set at the time of factory shipment or by the user (user). However, the determination reference value setting unit 61 is not provided. The predetermined coefficient may be a constant value.
[0065]
Furthermore, in the embodiment, the reception schedule can be changed, but it may be fixed to a fixed schedule. Also, the reception schedule is not only selected from preset ones, but, for example, a routine that can calculate the reception interval using the average value of the time correction value as a parameter is provided so that the reception schedule can be set by the average value. Also good.
[0066]
The prediction correction amount prediction from the past reception / time correction amount data only needs to be able to predict the prediction correction amount, and cases other than the above embodiments are also included in the present invention.
For example, in the above-described embodiments, the predicted correction amount is updated by sequentially using newly received data. However, as shown in FIG. 13, data for 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 in accordance with the data change for the week. Specifically, first, data for one week may be accumulated, and thereafter the data for each day of the week may be used as the predicted correction amount for each day.
In addition, what is necessary is just to make it acquire data for one week every 1 to several months. However, a manual data acquisition mode in which data for one week from the time when the user performs a data acquisition instruction operation may be provided.
Further, not only for one week but also data for one to several weeks may be accumulated, and the predicted correction amount for each day of the week may be calculated using the data for each day of the week.
In such a case, for example, when the difference in the life cycle between workdays and attending school is affected, it is possible to make a prediction correction for each day of the week, and to influence the life cycle. When time is large, it is possible to perform time correction with high accuracy.
[0067]
The past data is not limited to one week's worth of data, but as shown in FIG. 14, the data for one year is accumulated, the amount of correction for each month is calculated and the data change trend is grasped. May calculate and correct the predicted correction amount based on the monthly correction amount of the past data before the previous year. In particular, as in Japan, when there is a temperature change according to the four seasons, the correction amount also increases / decreases according to the temperature change, so by calculating the predicted correction amount according to each month, more accurate Time adjustment can be performed.
[0068]
Further, the radio wave correction clock 1 displays whether the current time is displayed as the time corrected by the received radio wave, or the time corrected according to the predicted correction amount, that is, the time type is displayed on the liquid crystal screen. Or display means such as an organic EL screen. This display timing may be always displayed, or may be displayed for a certain time when the crown or button is operated. Further, the time type information is not limited to the screen display, and a special operation may be performed on a time display hand or a dedicated display hand may be used.
[0069]
2, 8, and 10, each means (especially each control unit) in the control circuit 24 includes hardware such as various logic elements, a CPU (central processing unit), a memory ( A computer provided with a storage device or the like may be provided in the timepiece 1, and a predetermined program or data (data stored in each storage unit) may be incorporated in the computer to realize each means.
For example, a CPU and a memory are arranged in the radio-controlled timepiece 1 so as to function as a computer, a predetermined control program and data are installed in the memory, and the CPU is operated by the installed program, What is necessary is just to implement | achieve each means. Note that the timing for installing the program or the like in the memory may be incorporated in advance before assembling the memory into the timepiece 1 or may be incorporated in the memory in the timepiece 1 in the factory after the timepiece 1 is manufactured. Further, after the watch 1 is shipped, it may be incorporated via a communication means such as the Internet or a recording medium such as a CD-ROM or a memory card.
In order to install a predetermined program or the like in the radio-controlled timepiece 1, a memory card, a CD-ROM or the like may be directly inserted into the radio-controlled timepiece 1, or an external device for reading these storage media may be used. May be connected to the radio-controlled timepiece 1. Further, a LAN cable, a telephone line or the like may be connected to the radio-controlled timepiece 1 to supply and install a program or the like by communication, or since the antenna 21 is provided, the program is supplied and installed wirelessly. Also good.
[0070]
If a control program or the like provided by such a recording medium or communication means such as the Internet is incorporated in the radio-controlled timepiece 1, the functions of each invention can be realized only by changing the program. It is also possible to select and incorporate a control program when doing so. In this case, since various radio-controlled timepieces 1 having different control formats can be manufactured only by changing the program, the parts can be shared, and the manufacturing cost when developing variations can be greatly reduced.
[0071]
The functions of the radio-controlled timepiece, that is, each configuration of the time measuring means, the receiving means, the time correcting means, etc. is not limited to that of the above-described embodiment, and each means of a conventionally known radio-controlled timepiece can be used.
[0072]
The radio-controlled timepiece 1 of the present invention is not limited to an analog type timepiece, and may be a digital type timepiece or a timepiece having both an analog display pointer and a digital display liquid crystal display unit. Furthermore, the radio wave correction watch 1 can be applied to various watches such as a portable watch such as a wrist watch or a pocket watch, and an installation type watch such as a wall clock or a table clock.
Further, the external wireless information is not limited to time information using long wave standard radio waves. For example, wireless information using FM, GPS, Bluetooth, or a non-contact IC card may be used as long as it includes at least time information. Incidentally, it goes without saying that the configurations of the antenna 21 and the receiving circuit 22 are appropriately changed depending on the type of radio waves.
[0073]
Furthermore, the electronic device of the present invention is not limited to the one in the above embodiment, and may be a parent-child clock, a repeater, or the like, for example. Here, the parent / child clock is a clock that transmits time information held by the parent clock to the child clock by wireless or the like, and the child clock corrects the time based on the time information. Therefore, for example, a parent clock composed of a wall clock, a table clock, or the like is configured by the electronic apparatus of the present invention, and a signal of the predicted correction amount calculated by the correction amount calculation unit of the parent clock is transmitted to the child clock, (Watches, table clocks, etc.) may be time-corrected according to the predicted correction amount.
The master clock sends the correction amount (difference between time data inside and outside) to the slave clock when it receives external wireless information such as radio waves at a predetermined reception interval by the reception schedule control unit. The time may be adjusted based on the amount,
Similarly, the present invention is applied to a repeater that receives external wireless information and transfers it to a clock device or the like, and measures a predicted correction signal or a signal of a correction amount due to a radio wave received at a predetermined reception interval like the parent clock. The time measuring device may receive the information and correct the time so that the accurate time can be displayed.
[0074]
Furthermore, the electronic device of the present invention is not limited to a radio wave correction watch, and may be any device that performs some processing or operation using accurate time information, such as a personal computer, an electronic toy, or a timer. In particular, since the present invention has an effect of reducing power consumption, it is suitable for a battery-driven portable electronic device. At this time, not only the one using a normal primary battery but also one having various generators such as a solar battery may be used. In this case, there is an advantage that the duration can be extended by reducing the power consumption.
[0075]
[Other Embodiments of the Present Invention]
Other embodiments of the present invention are shown below.
An electronic device reception control method according to a first aspect includes an external wireless information receiving unit that receives external wireless information including time information, an internal time counting unit that measures an internal time based on a reference clock, and the internal An electronic device control method comprising an internal time correction control unit for correcting time, wherein the external time data is time information received by the external wireless information reception unit and the internal time data is timed by the internal time clock unit A time data comparison step for comparing the difference data and outputting the difference amount, a reception information storage step for storing each data of the difference amount at the time when the external wireless information reception unit receives the external wireless information, Prediction correction amount calculation process that calculates the prediction correction amount based on reception time data, difference amount data, and time elapsed since the last reception, and determination set based on the prediction correction amount A determination step of comparing the reference value and the difference amount to determine whether the external time data is correct time data, and at least the external radio information receiving unit or the internal time correction control unit based on a determination result of the determination step And a process control step for controlling one of the operations.
[0076]
According to a second aspect, in the first aspect, the determination reference value is a value in a predetermined range having an upper limit value and a lower limit value, and the processing control step is such that the difference amount is within the determination reference value range. In this case, an internal time correction instructing step for causing the internal time correction control unit to correct the internal time based on the difference amount is provided.
[0077]
According to a third aspect, in the first or second aspect, the determination reference value is a value in a predetermined range having an upper limit value and a lower limit value, and the process control step is configured such that the difference amount is in a range of the determination reference value. And a re-reception control step of instructing the external radio information receiving unit to re-receive when it is outside.
[0078]
According to a fourth aspect, in the first or second aspect, the determination reference value is a value in a predetermined range having an upper limit value and a lower limit value, and the processing control step is configured such that the difference amount is in a range of the determination reference value. When it is outside, it has a prediction correction amount correction control step of correcting the internal time based on the prediction correction amount to the internal time correction control unit.
[0079]
According to a fifth aspect, in the first or second aspect, the determination reference value is a value in a predetermined range having an upper limit value and a lower limit value, and the process control step is configured such that the difference amount is out of the determination reference value range. And a re-reception control step for instructing the external wireless information receiving unit to re-receive, and if the difference amount is outside the range of the determination reference value even if re-reception is performed a predetermined number of times, A predictive correction amount correction control step of causing the time correction control unit to correct the internal time based on the predicted correction amount.
[0080]
According to a sixth aspect, in any one of the first to fifth aspects, the determination reference value is set as an upper limit value or a lower limit value by multiplying the prediction correction amount by a predetermined coefficient. Is.
The seventh aspect is characterized in that, in the sixth aspect, a determination reference value setting step for setting a predetermined coefficient is provided.
[0081]
An electronic device control program according to an eighth aspect causes a computer incorporated in the electronic device to execute the control method according to any of the first to seventh aspects.
A recording medium according to a ninth aspect is readable by a computer recording a program that causes a computer incorporated in an electronic device to execute the control method according to any of the first to seventh aspects. Is.
The effects similar to those of the invention of the electronic device can be achieved also by the configuration of each method, program, and recording medium.
[0082]
【The invention's effect】
As described above, according to the electronic device, the control method of the electronic device, the program, and the recording medium of the present invention, it is possible to reduce power consumption and perform accurate time correction, thereby improving time indication accuracy. There is an effect that it can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a radio-controlled timepiece according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a control circuit of the first embodiment.
FIG. 3 is a diagram showing a data configuration of a reception information storage unit in the first embodiment.
FIG. 4 is a diagram showing the contents of a reception schedule in the first embodiment.
FIG. 5 is a flowchart showing an initial operation of the control circuit in the first embodiment.
FIG. 6 is a flowchart showing the operation of the control circuit in the first embodiment.
FIG. 7 is a graph showing a change with time of a time correction value (difference amount) in the first embodiment.
FIG. 8 is a block diagram showing a configuration of a control circuit according to a second embodiment of the present invention.
FIG. 9 is a flowchart showing the operation of the control circuit in the second embodiment.
FIG. 10 is a block diagram showing a configuration of a control circuit according to a third embodiment of the present invention.
FIG. 11 is a flowchart showing the operation of the control circuit in the third embodiment.
FIG. 12 is a graph showing a change with time of a time correction value (difference amount) in a modification of the present invention.
FIG. 13 is a graph showing a change with time of a time correction value (difference amount) in another modification of the present invention.
FIG. 14 is a graph showing a change with time of a time correction value (difference amount) in another modification of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Radio wave correction clock, 21 ... Antenna, 22 ... Reception circuit, 23 ... Data storage circuit, 24 ... Control circuit, 25 ... Display drive circuit, 26 ... Hand position detection circuit, 27 ... Power supply, 28 ... Display part, 28A ... Pointer, 28B ... train wheel, 28C ... motor, 50 ... reference oscillation source, 51 ... oscillation circuit, 52 ... frequency divider, 53 ... time counter, 54 ... comparison circuit, 55 ... internal time correction control unit, 56 ... process control , 57 ... determination unit, 58 ... reception information storage unit, 59 ... prediction correction amount calculation unit, 60 ... determination reference value creation unit, 61 ... determination reference value setting unit, 62 ... reception schedule control unit, 63 ... external reception operation 71, a re-reception control unit, 72 ... an internal time correction instruction unit, 73 ... a predicted correction amount correction control unit.

Claims (10)

An external wireless information receiving unit for receiving external wireless information including time information;
An internal time counter that counts the internal time based on the reference clock;
A time data comparison unit that compares the external time data that is the time information received by the external wireless information reception unit and the internal time data measured by the internal time measurement unit, and outputs the difference amount;
An internal time correction control unit for correcting the internal time;
A reception information storage unit in which each data of the difference amount at the time when external wireless information is received by the external wireless information reception unit; and
A predicted correction amount calculating unit that calculates a predicted correction amount based on the reception time data, the difference amount data, and an elapsed time from the previous reception;
A determination unit that compares the determination reference value set based on a predicted correction amount and the difference amount to determine whether the external time data is correct time data;
A processing control unit that controls the operation of at least one of the external wireless information reception unit or the internal time correction control unit based on the determination result of the determination unit;
An electronic device comprising: The electronic device according to claim 1,
The determination reference value is a value in a predetermined range having an upper limit value and a lower limit value,
The processing control unit includes an internal time correction instruction unit that causes the internal time correction control unit to correct an internal time based on the difference amount when the difference amount is within the range of the determination reference value. Electronic equipment characterized by The electronic device according to claim 1 or 2,
The determination reference value is a value in a predetermined range having an upper limit value and a lower limit value,
The electronic apparatus according to claim 1, wherein the processing control unit includes a re-reception control unit that instructs the external wireless information reception unit to perform re-reception when the difference amount is outside the range of the determination reference value. The electronic device according to claim 1 or 2,
The determination reference value is a value in a predetermined range having an upper limit value and a lower limit value,
The process control unit includes a prediction correction amount correction control unit that causes the internal time correction control unit to correct the internal time based on the prediction correction amount when the difference amount is outside the range of the determination reference value. An electronic device including the electronic device. The electronic device according to claim 1 or 2,
The determination reference value is a value in a predetermined range having an upper limit value and a lower limit value,
The processing control unit, when the difference amount is outside the range of the determination reference value, a re-reception control unit that instructs the external wireless information receiving unit to re-receive,
A predictive correction amount correction control unit that causes the internal time correction control unit to correct the internal time based on the predictive correction amount when the difference amount is outside the range of the determination reference value even if re-reception is performed a predetermined number of times. And an electronic device. In the electronic device in any one of Claims 1-5,
The electronic device according to claim 1, wherein the determination reference value is set as an upper limit value or a lower limit value by multiplying the prediction correction amount by a predetermined coefficient. The electronic device according to claim 6,
An electronic apparatus comprising a determination reference value setting unit for setting the predetermined coefficient. 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 an internal time correction control unit that corrects the internal time Control method,
A time data comparison step of comparing the external time data which is the time information received by the external wireless information receiver and the internal time data timed by the internal time counter and outputting the difference amount;
A reception information storage step of storing each data of the difference amount at the time when external wireless information is received by the external wireless information receiving unit;
A predicted correction amount calculating step of calculating a predicted correction amount based on the reception time data, the difference amount data, and the elapsed time from the previous reception;
A determination step of determining whether the external time data is correct time data by comparing the determination reference value set based on the predicted correction amount and the difference amount;
And a processing control step of controlling at least one of the operation of the external radio information receiving unit or the internal time adjustment control unit based on a determination result of the determination step. The program for making the computer incorporated in the electronic device perform the control method of Claim 8. A computer-readable recording medium on which the program according to claim 9 is recorded.

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