JP6894740B2 - Percentage correction system and mobile terminals - Google Patents

Description

The present invention relates to a rate correction system and a mobile terminal .

Conventionally, an electronic clock that measures time based on the oscillation frequency of a crystal oscillator has been known. In such an electronic watch, the crystal unit changes with time after being used for a long period of time. When the crystal unit changes with time, the oscillation frequency changes, and as a result, the rate of the electronic clock shifts. Therefore, for example, Patent Document 1 discloses a technique for correcting the rate according to a change with time of the crystal oscillator.

JP-A-63-77202

Here, in order to correct the rate, it is conceivable to store a predetermined reference date at which the change with time starts in advance in the electronic clock and acquire the number of days elapsed from the predetermined reference date. However, the electronic clock has a small area in which information can be stored, and it is difficult to store information on the reference date, information on the number of days elapsed from the reference date, and the like in the electronic clock. In addition, it is difficult to perform a complicated calculation process for calculating the amount of deviation of the step in the electronic clock.

The present invention has been made in view of such circumstances, and an object of the present invention is to reduce the amount of information stored in an electronic timepiece and enable a complicated process for calculating the amount of deviation in the rate of the electronic timepiece. There is.

The invention disclosed in the present application in order to solve the above problems has various aspects, and the outline of typical ones of these aspects is as follows.

(1) An electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator, a tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time, and a determination unit according to the oscillator or oscillator. It has a calculation unit that calculates the amount of deviation of the step according to the time course of the oscillator or the oscillator based on the number of days elapsed from the reference date, and the tendency storage unit is the oscillator or the oscillator of the oscillator or the oscillator. A plurality of the time-varying trends corresponding to each type are stored in advance, and the calculation unit selects and selects the time-varying tendency corresponding to the type of the oscillator or the oscillator from the plurality of time-dependent trends. A rate correction system that calculates the amount of deviation of the rate based on the tendency of change over time .

(2) An electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator, and a change over time of the oscillator or oscillator based on the number of days elapsed from the reference date determined according to the oscillator or oscillator. It has a calculation unit that calculates the amount of deviation of the corresponding rate and a tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time, and the reference date is the oscillator for an arbitrary period. Alternatively, a rate correction system estimated based on the rate of change of the oscillation frequency of the oscillator and the tendency of change over time stored in the tendency storage unit.

(3) In (2), the tendency storage unit stores a plurality of the time-varying tendencies that are different from each other in advance, and based on the rate of change, the tendency storage unit stores the plurality of time-dependent changes tendencies. A rate correction system that selects one of them and calculates the amount of deviation of the rate based on the selected tendency of change with time.

(4) In any of (1) to (3), the mobile terminal provided with the calculation unit transmits the calculated deviation amount of the rate to the electronic clock by communication connection with the electronic clock, and the electronic clock is used. A rate correction system that corrects the rate deviation of the clock.

(5) In any of (1) to (4), a rate correction system including a server having a generation unit that generates the change tendency with time.

(6) Based on an electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator and the number of days elapsed from the reference date that can be connected to the electronic clock and determined according to the oscillator or oscillator. A mobile terminal having a calculation unit for calculating the amount of deviation of the rate according to the time course of the oscillator or the oscillator, and a plurality of acquired days by acquiring the number of days elapsed from the reference date and the amount of deviation of the rate. A rate correction system including a server having a generation unit that generates a time-dependent change tendency of the oscillation frequency of the oscillator or the oscillator based on the number of days elapsed from the reference date and the amount of deviation of the rate.

(7) In (5) or (6), the mobile terminal having the calculation unit has a tendency storage unit that stores the time-dependent change tendency generated by the generation unit, and the calculation unit has the time-dependent change. A rate correction system that calculates the amount of deviation of the rate based on the tendency.

(8) A tendency storage unit that can be communicatively connected to an electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator and stores the tendency of the oscillation frequency of the oscillator or oscillator to change with time in advance, and the oscillator. Alternatively, the trend storage unit includes a calculation unit that calculates the amount of deviation of the rate according to the time course of the oscillator or the oscillator based on the number of days elapsed from the reference date determined according to the oscillator. A plurality of the time-dependent changes corresponding to the types of the oscillator or the oscillator are stored in advance, and the calculation unit stores the time-dependent changes corresponding to the type of the oscillator or the oscillator among the plurality of the time-dependent trends. A portable terminal that selects a tendency and calculates the amount of deviation of the step based on the selected tendency of change with time.

(9) A tendency storage unit that can be communicatively connected to an electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator and stores the tendency of the oscillation frequency of the oscillator or oscillator to change with time in advance, and the oscillator. Alternatively, the first unit is communicated with the electronic clock and a calculation unit that calculates the amount of deviation of the rate according to the change over time of the oscillator or the oscillator based on the number of days elapsed from the reference date determined according to the oscillator. A rate of change acquisition unit that acquires the rate of change of the oscillation frequency of the oscillator or oscillator during the period from the connection date to the second connection date of communication connection with the electronic clock, and the change rate acquired by the rate of change acquisition unit. A mobile terminal having a reference date acquisition unit that acquires the reference date estimated based on the rate and the time-dependent change tendency stored in the tendency storage unit.

(10) In (9), the tendency storage unit stores a plurality of the time-dependent changes tendencies that are different from each other in advance, and the reference date acquisition unit is based on the change rate acquired by the change rate acquisition unit. , A mobile terminal that selects one of the plurality of time-varying trends stored in the tendency storage unit and acquires the reference date estimated based on the selected time-varying tendency.

According to the aspects (1), (4) to (8) of the present invention, a complicated process for reducing the amount of information stored in the electronic timepiece and calculating the amount of deviation in the rate of the electronic timepiece is performed. It will be possible.

Further, according to the aspects (2) and (9) of the present invention, the amount of deviation of the step can be calculated even when the reference date is not known in advance.

Further, according to the aspects (3) and (10) of the present invention, the amount of deviation in the rate can be calculated even when the tendency of the oscillation frequency of the oscillator or the oscillator to change with time is not known in advance. ..

It is a top view which shows an example of the appearance of an electronic timepiece. It is a block diagram which shows an example of the whole structure of the rate correction system which concerns on this embodiment. It is a figure which shows an example of the graph about the time-dependent change tendency of the oscillation frequency of a crystal oscillator. It is a figure which shows an example of the rate of change of the oscillation frequency of a crystal oscillator in a predetermined period. It is a figure explaining the acquisition of the elapsed days. It is a flowchart for demonstrating the calculation of the deviation amount of the step | degree in this embodiment. It is a figure explaining the selection of the time-dependent change tendency in the modification of this embodiment.

Hereinafter, the step correction system 100 according to the embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to the drawings. First, with reference to FIG. 1, an outline of the configuration of the electronic clock 1 included in the rate correction system 100 according to the present embodiment will be described. FIG. 1 is a plan view showing an example of the appearance of the electronic clock.

The electronic clock 1 has the appearance of a so-called analog wristwatch, and is connected to the mobile terminal 20 (see FIG. 2) by short-range wireless communication. The standard for short-range wireless communication is not particularly limited and may be any known standard, but in this embodiment, BLE (Bluetooth (registered trademark) Low Energy) is used.

The electronic clock 1 has a crown 2 used for setting the time of the time hand and using a function, and a push button 3. The electronic clock 1 has a dial 4 in a body which is an exterior. On the dial 4, a connection processing display (ACT in FIG. 1) 8 indicating that the electronic clock 1 is performing a process of establishing a communication connection with the mobile terminal 20 and a communication connection with the mobile terminal 20 are displayed. A link loss display (LL in FIG. 1) 9 indicating that the user has been disconnected, an e-mail reception display (MAIL in FIG. 1) 10 notifying that the mobile terminal 20 has received an e-mail, and a mobile terminal. 20 has an incoming call display (CALL in FIG. 1) 11 for notifying that there is an incoming call. The electronic clock 1 notifies the user of each information by pointing to any of the connection processing display 8, the link loss display 9, the e-mail reception display 10, and the telephone incoming call display 11 with the second hand 7.

The electronic clock 1 has a plurality of pointers driven by a stepping motor 36 (see FIG. 2). Specifically, the electronic clock 1 has an hour hand 5, a minute hand 6, and a second hand 7 as pointers. The electronic clock 1 may have a guideline other than these. It is preferable that the electronic clock 1 is provided with a windshield formed of a transparent material such as glass so as to cover the dial 4. In addition, it is preferable that the back cover is attached to the body on the opposite side of the windshield.

The design of the electronic clock 1 shown in FIG. 1 is an example. For example, the body may be square instead of round, and the presence, number, and arrangement of the crown 2 and the push button 3 are arbitrary.

The overall configuration of the rate correction system according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing an example of the overall configuration of the rate correction system according to the present embodiment.

The rate correction system 100 includes an electronic clock 1 and a mobile terminal 20. The mobile terminal 20 is an electronic device that can be carried by a user, and is, for example, a smartphone. The mobile terminal 20 has a communication unit (not shown) including an antenna, and the communication unit transmits and receives radio waves and the like used for short-range wireless communication.

As shown in FIG. 2, the electronic clock 1 identifies the oscillation circuit 31, the frequency dividing circuit 32, the counter 33, the control unit 34, the motor drive circuit 35, the stepping motor 36, and the time display unit 37. It has a number storage unit 38 and a crystal oscillator 40. Further, the electronic clock 1 has a communication unit (not shown) including an antenna, and the communication unit transmits and receives radio waves and the like used for short-range wireless communication.

The oscillation circuit 31 is connected to the crystal oscillator 40. The crystal oscillator 40 originally has characteristics, and for example, it is preferable to use one having an oscillation frequency of 32,768 Hz. The oscillation circuit 31 outputs a signal corresponding to the oscillation of the crystal oscillator 40. This signal is converted into a clock signal by the frequency dividing circuit 32. Further, the counter 33 counts the number of clock signals. Then, the control unit 34 outputs a drive signal to the motor drive circuit 35 according to the count number of the clock signals counted by the counter 33. The motor drive circuit 35 drives the stepping motor 36 based on the drive signal. When the stepping motor 36 is driven, the time display unit 37 displays the time. Specifically, the time display unit 37 displays the time by the hour hand 5, the minute hand 6, and the second hand 7 described above.

In this embodiment, an example using the crystal oscillator 40 will be described, but the present invention is not limited to this, and another oscillator or oscillator having a time-varying characteristic may be used. For example, a MEMS (micro electro mechanical systems) oscillator, a ceramic oscillator, or the like may be used.

Further, as shown in FIG. 2, the mobile terminal 20 has a GPS (Global Positioning System) receiving unit 21 and a reference time generating unit 22.

The mobile terminal 20 receives satellite radio waves transmitted from GPS satellites by a GPS receiving unit 21 including an antenna. GPS is a kind of satellite positioning system, and is realized by a plurality of GPS satellites orbiting the earth. Each of these GPS satellites is equipped with a high-precision atomic clock, and periodically transmits satellite signals including time information measured by the atomic clock. The mobile terminal 20 generates a reference time by the reference time generation unit 22 based on the radio waves received from the GPS satellites. The mobile terminal 20 is not limited to receiving satellite radio waves from GPS satellites. For example, the mobile terminal 20 may receive radio waves including time information transmitted from a base station of a mobile phone company or the like.

Further, the mobile terminal 20 transmits the information regarding the reference time generated by the reference time generation unit 22 to the electronic clock 1 by short-range wireless communication. As a result, the internal time of the electronic clock 1 is synchronized with the reference time and is kept accurate. At this time, after the clock signal for timing the reference time of the mobile terminal 20 is generated, the clock signal for timing the internal time of the electronic clock 1 generated at the nearest timing may be synchronized with the clock signal for timing the reference time. If the electronic clock 1 has a step difference, the difference between the internal time of the electronic clock 1 and the reference time becomes large unless the electronic clock 1 and the mobile terminal 20 are connected to each other for a long time by short-range wireless communication. The step rate indicates the degree of advancement or delay of the time in a certain period.

Here, the crystal oscillator 40 is fixed to a circuit board or the like by soldering in a heat treatment step (reflow step). At this time, a thermal stress is generated in the crystal oscillator 40, and the thermal stress is gradually relaxed as time passes. As the thermal stress is relaxed, the frequency shift of the crystal oscillator 40 occurs, and the frequency shift occurs, so that the rate of the internal time measured by the electronic clock 1 shifts. Therefore, even if the steps are adjusted accurately at the time of shipment, the steps will shift due to changes over time. If the electronic clock 1 has a step deviation, the internal time will deviate from the reference time. Moreover, the factor of the change with time is not only the reflow but also the generation of gas in the package.

Therefore, in the rate correction system 100 according to the present embodiment, as shown in FIG. 2, the mobile terminal 20 further includes a reference date acquisition unit 23, a tendency storage unit 24, and a calculation unit 25. The reference date acquisition unit 23, the tendency storage unit 24, and the calculation unit 25 may be stored by installing the application in the memory or the like provided in the mobile terminal 20. The operation of the installed application may be controlled by a CPU (Central Processing Unit) included in the mobile terminal 20. The same applies to the rate of change acquisition unit 26 described later.

The reference date acquisition unit 23 acquires a reference date determined according to the crystal oscillator based on the identification number stored in the identification number storage unit 38 of the electronic clock 1 by short-range wireless communication. Here, the identification number is a number assigned in advance to the electronic clock 1. Specifically, for example, it is a serial number assigned to each product or a lot number assigned to each product type. The reference date is a date that serves as a reference for the start of the time-dependent change of the crystal oscillator 40. The reference date is, for example, a mounting date on which the crystal oscillator 40 is mounted on a circuit board or the like, a manufacturing date of the crystal oscillator 40, or the like. The identification number storage unit 38 is, for example, a MONOS (Metal Oxide Nitride Oxide Silicon) type non-volatile memory.

The tendency storage unit 24 stores the tendency of the oscillation frequency of the crystal oscillator 40 to change with time. FIG. 3 is a diagram showing an example of a graph relating to the tendency of the oscillation frequency of the crystal oscillator to change with time. In FIG. 3, the horizontal axis represents the number of days elapsed from the reference date, and the vertical axis represents the amount of deviation of the oscillation frequency of the crystal oscillator 40 (Δf [ppm (parts per million)]).

The time-dependent change in the oscillation frequency of the crystal oscillator 40 depends on the characteristics of the crystal oscillator 40 or the mounting process. All of the same types of crystal units have the same tendency to change with time. That is, in electronic clocks having the same type of crystal oscillator and manufactured in the same process, the same rate deviation will occur in each case. Therefore, in an electronic clock having the same type of crystal oscillator 40, if the tendency of the crystal oscillator of one electronic clock to change with time is known in advance, the tendency of the crystal oscillator of another electronic clock to change with time can be predicted. can do. In other words, if the tendency of the crystal oscillator of one electronic clock to change with time is known in advance, it is possible to predict how much the other electronic clocks are out of step based on the number of days elapsed from the reference date. Can be done.

The calculation unit 25 is based on a reference date determined according to the crystal oscillator 40 acquired by the reference date acquisition unit 23 and a tendency of the oscillation frequency of the crystal oscillator 40 stored in advance by the tendency storage unit 24 to change with time. The amount of deviation of the rate of the electronic clock 1 is calculated. As described above, if the number of days elapsed from the reference date is known, it is possible to predict the change over time in the oscillation frequency of the crystal oscillator 40, so that the amount of deviation in the step rate can be calculated.

The information regarding the amount of deviation of the step calculated by the calculation unit 25 is transmitted to the electronic clock 1 by short-range wireless communication. The control unit 34 receives the transmitted information, and corrects at least one of the oscillation frequency of the oscillation circuit 31 and the division ratio of the frequency division circuit 32 based on the amount of deviation of the rate received by the control unit 34. As a result, the rate shift of the electronic clock 1 due to the time course of the generation frequency of the crystal oscillator 40 is corrected.

As described above, in the present embodiment, the mobile terminal 20 calculates the amount of deviation in the rate of the electronic clock 1. It is necessary to calculate the amount of deviation of the rate by using a complicated calculation formula shown in the graph of the tendency of change with time shown in FIG. 3. Therefore, such a calculation formula is stored in the electronic clock 1 and the calculation process is performed. Is difficult to do. In the present embodiment, the mobile terminal 20 has a higher calculation processing capacity than the electronic clock 1 and a large amount of storable information, and calculates the amount of deviation in the rate. Therefore, the amount of information stored in the memory of the electronic clock 1 can be reduced.

In the present embodiment, an example in which the electronic timepiece 1 stores the identification number in the identification number storage unit 38 has been described, but the present invention is not limited to this. For example, the electronic watch 1 itself or various attached documents such as a warranty card may have the identification number physically described by characters or barcodes. Then, when installing an application for connecting the electronic clock 1 to the mobile terminal 20 by communication, the user may register the identification number of the electronic clock 1 in the mobile terminal 20 in advance. Further, the mobile terminal 20 accesses a server having a database for storing the identification number of the electronic clock 1 via a network, and the reference date acquisition unit 23 acquires the identification number of the electronic clock 1 from the database. You may. By adopting such a configuration, it is not necessary to store the identification number in the electronic clock 1, and the amount of information stored in the memory of the electronic clock 1 can be reduced.

Further, with reference to FIGS. 2 to 5, correction of the step deviation in the case where the reference date cannot be obtained from the identification number of the electronic clock 1 will be described. FIG. 4 is a diagram showing an example of the rate of change of the oscillation frequency of the crystal oscillator in a predetermined period. FIG. 5 is a diagram illustrating acquisition of the number of elapsed days.

When the electronic clock 1 does not have the identification number storage unit 38, or when the electronic clock 1 is repaired, the identification number may not be acquired for some reason. In such a case, the reference date determined according to the crystal unit 40 cannot be obtained. Therefore, as shown in FIG. 2, the mobile terminal 20 further includes a change rate acquisition unit 26.

The rate of change acquisition unit 26 acquires the rate of change of the oscillation frequency of the crystal oscillator 40 in a predetermined period by short-range wireless communication. For example, as shown in FIG. 4, the day when the mobile terminal 20 and the electronic watch 1 are connected by communication this time (second connection day t2) from the day when the mobile terminal 20 and the electronic watch 1 are connected by communication last time (first connection date t1). ), The change amount Δf of the oscillation frequency of the crystal oscillator 40 in the period Δt (t2-t1) up to) is obtained, and the change amount Δf of the oscillation frequency is divided by the period Δt to obtain the rate of change with time per day. It is good to do it. If the change over time has already been corrected at that time, the amount of change is subtracted and the rate of change when the correction is not performed is used. The rate of change with time Δf / Δt (Δf ÷ Δt) per day indicates the slope of the graph of FIG. The mobile terminal 20 and the electronic watch 1 may be connected by communication during the period between the first connection date t1 and the second connection date t2. If the period between the first connection date t1 and the second connection date t2 is too short, a sufficient amount of change Δf cannot be obtained to obtain the rate of change of the oscillation frequency, so that it is sufficient to obtain the rate of change of the oscillation frequency. It is advisable to set the first connection date t1 and the second connection date t2 so as to be a period during which a large amount of change Δf can be obtained.

As described above with reference to FIG. 3, the tendency storage unit 24 stores the tendency of the oscillation frequency of the crystal oscillator 40 to change with time. As shown in FIG. 3, how the oscillation frequency of the crystal oscillator 40 changes based on the number of days elapsed from the reference date can be estimated in advance from the characteristics of the crystal oscillator 40. Therefore, the rate of change of the oscillation frequency in a certain period can be estimated.

FIG. 5 shows that the slope of the graph relating to the rate of change of the oscillation frequency shown in FIG. 4 coincides with the slope of the elapsed days of 50 to 100 days in the tendency of the oscillation frequency to change with time shown in FIG. That is, when the rate of change of the oscillation frequency of the crystal oscillator 40 acquired by the rate of change acquisition unit 26 tends to be shown in FIG. 4, the crystal oscillator 40 is about 50 to 100 days after the reference date. Is presumed. From the estimated number of days elapsed, the reference date, which is the reference date for the start of changes over time, is estimated. It should be noted that the reference date may be estimated by acquiring two or more samples of the rate of change with time and performing pattern matching with the tendency of change with time.

In this way, the reference date acquisition unit 23 acquires the reference date estimated based on the change rate acquired by the change rate acquisition unit 26 and the time-dependent change tendency stored in the tendency storage unit 24. Then, the calculation unit 25 determines the electronic clock 1 based on the estimated reference date acquired by the reference date acquisition unit 23 and the temporal change tendency of the oscillation frequency of the crystal oscillator 40 stored in advance by the tendency storage unit 24. Calculate the amount of deviation of the rate. Then, the information regarding the step deviation amount calculated by the calculation unit 25 is transmitted to the electronic clock 1 by short-range wireless communication. The control unit 34 receives the transmitted information, and corrects at least one of the oscillation frequency of the oscillation circuit 31 and the division ratio of the frequency division circuit 32 based on the amount of deviation of the rate received by the control unit 34. As a result, the rate shift of the electronic clock 1 due to the time course of the generation frequency of the crystal oscillator 40 is corrected.

As described above, in the present embodiment, even when the reference date cannot be directly obtained, such as when the identification number is not stored in the electronic clock 1, the predetermined period of the crystal oscillator 40 of the electronic clock 1 The reference date can be estimated by acquiring the rate of change of the oscillation frequency in. Then, the amount of deviation of the step can be calculated based on the estimated reference date. As shown in FIG. 5, the slope of the change tendency of the crystal oscillator 40 with time decreases as the number of elapsed days increases. If the slope of the tendency to change with time is small, it becomes difficult to accurately obtain the number of elapsed days. When the inclination is small, it is advisable to lengthen the predetermined period.

FIG. 6 is a flowchart for explaining the calculation of the step deviation amount in the present embodiment.

When the identification number can be acquired from the electronic clock 1 (YES in step S1), that is, when the electronic clock 1 stores the identification number, the reference date acquisition unit 23 refers to the electronic clock 1 by short-range wireless communication. Get the day (step S2). The calculation unit 25 calculates the amount of deviation of the step based on the reference date acquired by the reference date acquisition unit 23 and the time-dependent change tendency stored in the tendency storage unit 24 (step S3). On the other hand, when the reference date acquisition unit 23 cannot acquire the reference date from the identification number storage unit 38 or the like of the electronic clock 1 (NO in step S1), the change rate acquisition unit 26 uses short-range wireless communication to obtain a crystal in a predetermined period. The rate of change of the oscillation frequency of the oscillator 40 is acquired (step S4). Then, the reference date acquisition unit 23 acquires the reference date estimated based on the change rate acquired by the change rate acquisition unit 26 and the time-dependent change tendency stored in the tendency storage unit 24 (step S5). After that, the calculation unit 25 calculates the amount of deviation of the step based on the estimated reference date acquired by the reference date acquisition unit 23 and the time-dependent change tendency stored in the tendency storage unit 24 (step S3).

Further, a modified example of the present embodiment will be described with reference to FIG. 7. FIG. 7 is a diagram illustrating selection of a tendency of change with time in a modified example of the present embodiment. The same reference numerals are used for the same configurations as those of the present embodiment described with reference to FIG. 2 and the like, and the description thereof will be omitted.

In this modification, the tendency storage unit 24 stores a plurality of patterns of time-dependent trends corresponding to a plurality of different crystal oscillators. FIG. 7 shows an example in which the tendency storage unit 24 stores the tendency patterns 1 to 3 as a plurality of time-dependent changes tendencies.

In this modification, the rate of change acquisition unit 26 acquires the rate of change of the oscillation frequency of the crystal oscillator 40 in a predetermined period by short-range wireless communication. FIG. 7 shows a case where the rate of change of the oscillation frequency in the predetermined period Δt (t2-t1) acquired by the rate of change acquisition unit 26 is Δf / Δt (Δf ÷ Δt).

As shown in FIG. 7, the rate of change (slope: Δf / Δt) acquired by the rate of change acquisition unit 26 does not match the slope of the tendency pattern 1 and the tendency pattern 3, but matches the slope of the tendency pattern 2. There is. That is, the tendency of the crystal oscillator 40 to change with time corresponds to that shown in the tendency pattern 2.

The reference date acquisition unit 23 selects the tendency pattern 2 from the tendency patterns 1 to 3 stored in the tendency storage unit 24, and acquires the reference date estimated based on the selected tendency pattern 2. Then, the calculation unit 25 calculates the amount of deviation in the rate of the electronic clock 1 based on the estimated reference date acquired by the reference date acquisition unit 23 and the tendency pattern 2 selected by the reference date acquisition unit 23.

This modification is effective when the tendency of the crystal oscillator 40 of the electronic clock 1 to change with time is not known in advance, or when the tendency of the crystal oscillator 40 to change with time is changed by repairing the electronic clock 1. is there.

Further, as shown in FIG. 2, the rate correction system 100 acquires the number of days elapsed from the reference date and the amount of deviation of the current rate from each of the electronic clocks 1 used by the plurality of users, and obtains the acquired reference. The generation unit 50 may have a generation unit 50 that generates a calculation formula showing a tendency of change with time based on the number of days elapsed from the day and the amount of step deviation. For example, the generation unit 50 acquires the number of days elapsed from the reference date and the amount of deviation of the current rate in each electronic clock 1, and joins the data to show a tendency of change with time as shown in FIG. It is advisable to generate an expression (graph). Alternatively, it is preferable to generate a calculation formula showing the tendency of the oscillation frequency of the crystal oscillator 40 to change with time from the average value of the rate of change of the oscillation frequency of the crystal oscillator 40 of each electronic clock 1 used by a plurality of users. The generation unit 50 may be provided, for example, on a server managed by a manufacturer or the like. Then, the generated calculation formula indicating the tendency of change with time is distributed to each mobile terminal 20 capable of communicating with each electronic clock 1 used by a plurality of users, and stored in the tendency storage unit 24 of the mobile terminal 20. It is good.

As a result, even when the tendency of the crystal oscillator 40 to change with time cannot be predicted in advance, such as in a new product, it is possible to calculate the amount of deviation in the step and accurately correct the deviation in the step. Further, conventionally, when the tendency of the crystal oscillator 40 to change with time cannot be predicted in advance, the electronic clock 1 similar to the product sold by the manufacturer to the user is managed in-house, and a calculation formula showing the tendency of change with time is used. By collecting information from each electronic clock 1 used by a plurality of users after the sale, it is not necessary to manage the electronic clock 1 similar to the product sold by the manufacturer. Further, after the electronic clock 1 is handed over to the user, the tendency of change with time can be updated at any time, and the amount of deviation of the step can be calculated based on the more accurate tendency of change with time.

Although the embodiment according to the present invention has been described above, the specific configuration shown in this embodiment is shown as an example, and it is not intended to limit the technical scope of the present invention to this. Those skilled in the art may appropriately modify these disclosed embodiments, and it should be understood that the technical scope of the invention disclosed herein also includes such modifications.

1 Electronic clock, 2 Crown, 3 Push button, 4 Dial, 5 hour hand, 6 minute hand, 7 second hand, 8 Connection processing display, 9 Link loss display, 10 E-mail reception display, 11 Incoming call display, 20 Mobile terminal, 21 GPS receiver, 22 reference time generator, 23 reference date acquisition unit, 24 trend storage unit, 25 calculation unit, 26 rate of change acquisition unit, 31 oscillation circuit, 32 frequency division circuit, 33 counter, 34 control unit, 35 motor drive Circuit, 36 stepping motor, 37 time display unit, 38 identification number storage unit, 40 crystal oscillator, 50 generation unit.

Claims (10)

An electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator ,
A tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time, and
A calculation unit that calculates the amount of deviation of the rate according to the change over time of the oscillator or oscillator based on the number of days elapsed from the reference date determined according to the oscillator or oscillator .
Have,
The tendency storage unit stores in advance a plurality of the temporal change tendencies corresponding to the types of the oscillator or the oscillator.
The calculation unit selects the temporal change tendency corresponding to the type of the oscillator or the oscillator from the plurality of temporal change tendencies, and calculates the deviation amount of the step based on the selected temporal change tendency. System . An electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator ,
A calculation unit that calculates the amount of deviation of the rate according to the change over time of the oscillator or oscillator based on the number of days elapsed from the reference date determined according to the oscillator or oscillator.
A tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time,
Have,
The reference date is a rate correction system estimated based on the rate of change of the oscillation frequency of the oscillator or the oscillator in an arbitrary period and the time-dependent change tendency stored in the tendency storage unit. The tendency storage unit stores in advance a plurality of the temporal change tendencies that are different from each other.
2. According to claim 2 , one of the plurality of time-varying trends stored in the tendency storage unit is selected based on the rate of change, and the amount of deviation of the step is calculated based on the selected time-varying tendency. The described rate correction system . Any one of claims 1 to 3 in which a mobile terminal including the calculation unit transmits the calculated amount of deviation of the rate to the electronic clock by communication connection with the electronic clock, and corrects the deviation of the pace of the electronic clock. The rate correction system according to item 1. The rate correction system according to any one of claims 1 to 4, which includes a server having a generation unit that generates the time-varying tendency. An electronic clock that ticks the time based on the oscillation frequency of the oscillator or oscillator,
It is possible to communicate with the electronic clock, and the amount of deviation of the rate according to the change over time of the oscillator or oscillator is calculated based on the number of days elapsed from the reference date determined according to the oscillator or oscillator. A mobile terminal with a calculation unit and
The number of days elapsed from the reference date and the amount of deviation of the step are acquired, and the oscillation frequency of the oscillator or oscillator changes with time based on the number of days elapsed from the obtained reference date and the amount of deviation of the step. A server with a generator that generates trends, and
A rate correction system that includes. The mobile terminal having the calculation unit has a tendency storage unit that stores the time-dependent change tendency generated by the generation unit.
The rate correction system according to claim 5 or 6 , wherein the calculation unit calculates the amount of deviation of the rate based on the tendency of change with time. It can be connected to an electronic clock that keeps time based on the oscillation frequency of the oscillator or oscillator.
A tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time, and
A calculation unit that calculates the amount of deviation of the rate according to the change over time of the oscillator or oscillator based on the number of days elapsed from the reference date determined according to the oscillator or oscillator .
Have,
The tendency storage unit stores in advance a plurality of the temporal change tendencies corresponding to the types of the oscillator or the oscillator.
The calculation unit selects the temporal change tendency corresponding to the type of the oscillator or the oscillator from the plurality of temporal change tendencies, and calculates the deviation amount of the step based on the selected temporal change tendency. .. It can be connected to an electronic clock that keeps time based on the oscillation frequency of the oscillator or oscillator.
A tendency storage unit that stores in advance the tendency of the oscillation frequency of the oscillator or oscillator to change with time, and
A calculation unit that calculates the amount of deviation of the rate according to the change over time of the oscillator or oscillator based on the number of days elapsed from the reference date determined according to the oscillator or oscillator .
A change rate acquisition unit that acquires the rate of change in the oscillation frequency of the oscillator or oscillator during the period from the first connection date of communication connection with the electronic clock to the second connection date of communication connection with the electronic clock.
A reference date acquisition unit that acquires the reference date estimated based on the change rate acquired by the change rate acquisition unit and the time-dependent change tendency stored in the tendency storage unit.
Mobile terminal with. The tendency storage unit stores in advance a plurality of the temporal change tendencies that are different from each other.
Based on the rate of change acquired by the rate of change acquisition unit, the reference date acquisition unit selects one of the plurality of trends over time stored by the trend storage unit, and the selected tendency of change over time is selected. The mobile terminal according to claim 9 , which obtains the reference date estimated based on the above.

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