CN109976139A - The control method of electronic watch and electronic watch - Google Patents
The control method of electronic watch and electronic watch Download PDFInfo
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- CN109976139A CN109976139A CN201811581715.5A CN201811581715A CN109976139A CN 109976139 A CN109976139 A CN 109976139A CN 201811581715 A CN201811581715 A CN 201811581715A CN 109976139 A CN109976139 A CN 109976139A
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- 238000003860 storage Methods 0.000 claims description 33
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- 238000006243 chemical reaction Methods 0.000 description 6
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- 230000000694 effects Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
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Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM
- G04R20/16—Tuning or receiving; Circuits therefor
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Abstract
The present invention provides a kind of electronic watch of the precision inside moment that can be improved electronic watch and the control method of electronic watch.The frequency of the carrier wave of control unit (22) based on standard wave and the frequency (f of clock signalvco), and oscillating circuit (23) is controlled, so that the frequency (f of clock signalvco) close to reference frequency (f0).In this way, the carrier wave for the standard wave being managed using frequency with higher precision due to control unit (22) is come the frequency (f to clock signalvco) controlled, therefore can be improved the precision at the inside moment of electronic watch.
Description
Technical field
The present invention relates to the control methods of a kind of electronic watch and electronic watch.
Background technique
In the past, as inside moment for making electronic watch and it is correct at the time of consistent technology, and it has been known that there is the standards of reception
The structure of electric wave.Such as Patent Document 1 discloses the electronic watches for receiving standard wave.The electronic watch is to receiving
Standard wave is demodulated and obtains TCO (Time Code Out: time encoding output) signal, and from the TCO signal extraction date
Information and time information and by make the internal moment with it is correct at the time of it is consistent in a manner of make corrections.
The electric wave amendment clock and watch of patent document 1 have: receiving unit receives standard wave；Quartz crystal 431 generates
Reference signal；Moment counter 471 carries out timing to the internal moment based on reference signal；Timing receipt control unit 472,
It makes receiving unit work and executes reception processing；And moment correction portion 474, the internal moment is modified.Timing receipt control
Portion 472 processed executes at the first moment and receives processing and the first time of reception data of acquirement, and first time of reception that will have been obtained
Data are compared with the internal moment, and in the case where its time difference is first threshold or more, different from the first moment
It is executed at second moment and receives processing and obtain the second time of reception data.However the following topics exist, that is, even if at first
It carves or the second moment executed reception processing, in the case where electric wave amendment clock and watch can not receive standard wave, when can not also carry out
Carve amendment.In turn, the following topics exist, that is, even if having modified the internal moment using the TCO signal obtained from standard wave,
In the lower situation of frequency accuracy of the clock signal of quartz crystal 431, time error product can be also made because of the clock signal
Tire out in the internal moment.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2016-161467 bulletin
Summary of the invention
The present invention improves the precision at the inside moment of electronic watch as one of solution project.
Electronic watch involved in preferred mode (first method) of the invention is characterized in that, includes: receiving unit,
Receive standard wave；Oscillating circuit generates in order to which internal portion's moment carries out clock signal used in timing；And control
Portion, the frequency of the carrier wave of the standard wave received based on the receiving unit and the frequency of the clock signal, and it is right
The oscillating circuit is controlled so that the frequency of the clock signal close to the frequency according to the carrier wave of the standard wave and
Determining reference frequency.
According to above mode, since the carrier wave for the standard wave being managed using frequency with higher precision is come to clock
The frequency of signal is controlled, therefore can be improved the precision at internal moment.
In the preference (second method) of first method, the control unit includes: determining section, to the reference frequency
It is determined with the difference of the frequency of the clock signal；And correcting section, based on the difference to the oscillating circuit
Controlled, thus by make the frequency of the clock signal close to the reference frequency in a manner of make corrections.
According to above mode, being controlled in a manner of being cancelled fixed difference oscillating circuit,
So as to make the frequency of clock signal close to reference frequency.
In the preference (Third Way) of second method, the determining section from the carrier wave of the standard wave based on being given birth to
At reference wave and the clock signal, to be determined to the difference.
According to above mode, by generating reference wave from the carrier wave of high-precision standard wave, so as to obtain height
The reference wave of precision.
In the preference (fourth way) of Third Way, the determining section based at the first moment the reference wave with
First phase difference between the clock signal, the reference wave at the second moment and the second phase between the clock signal
Potential difference and the time from first moment until second moment, to be determined to the difference.
In general, the mode as the difference for obtaining two frequencies, there are so-called counter types, that is, is inciting somebody to action
There are several progress to the period of another frequency within the time that a cycle of a frequency as benchmark is set as integral multiple
It counts and another frequency is determined, to be determined to the difference of a frequency and another frequency.Therefore, it is counting
In number device mode, in order to obtain for being determined required information to another frequency, and need to spend a cycle
The time of integral multiple.In this regard, can be obtained within the time from the first moment until the second moment according to above mode
First phase difference and second phase for being determined to difference is poor.By by from the first moment until the second moment
Time is set as the time until a cycle Jing Guo reference frequency, so as to shorter compared with counter type
Time is determined difference.
In the preference (the 5th mode) of second method to fourth way, the correcting section output is based on the difference
Voltage is controlled, the oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
According to above mode, the control voltage based on difference is input to oscillating circuit, so as to clock signal
Frequency make corrections, thus it enables that the precision at internal moment improves.
In the preference (the 6th mode) of second method to the 5th mode, the oscillating circuit vibrate out with control voltage
The clock signal of corresponding frequency, the electronic watch include storage unit, and the storage unit adds up to the oscillating circuit
Actuation time and in the case where having input scheduled control voltage to the oscillating circuit clock signal generated frequency
Associated accumulative actuation time characteristic information is stored, and the control unit includes control voltage generating unit, the control electricity
Press generating unit referring to the accumulative actuation time characteristic information and to it is corresponding with the accumulative actuation time of the oscillating circuit when
The error of the frequency of clock signal is determined, and the control voltage, the correcting section are generated in a manner of offsetting the error
Based on the difference with determined the difference time point place the oscillating circuit accumulative actuation time come to it is described tire out
Meter actuation time characteristic information is updated, to make corrections to the frequency of the clock signal.
According to above mode, when have passed through the time to a certain degree from being determined to difference, even if not connecing
It, also can be using the accumulative actuation time characteristic information being updated come the frequency to clock signal in the case where receiving standard wave
It makes corrections.
In the preference (the 7th mode) of second method to fourth way, the oscillating circuit vibrate out with control voltage
The clock signal of corresponding frequency, the electronic watch include storage unit, and the storage unit pair and the oscillating circuit are resulting
Temperature and the frequency dependence connection of clock signal generated in the case where having input scheduled voltage to the oscillating circuit
Temperature characterisitic information is stored, and the control unit includes control voltage generating unit, and the control voltage generating unit is referring to the temperature
It spends characteristic information and the error of the frequency of clock signal corresponding with the temperature of the oscillating circuit is determined, and to offset
The mode of the error generates the control voltage, and the correcting section is based on the difference and the time point of the difference has been determined
The temperature of the oscillating circuit at place and the temperature characterisitic information is updated, thus to the frequency of the clock signal into
Row correction.
According to above mode, temperature when from difference has been determined it is different at a temperature of, even if not receiving standard electric
In the case where wave, it can also be maked corrections using the temperature characterisitic information being updated to the frequency of clock signal.
It include internal time correction portion, the inside in the preference (eighth mode) of second method to the 7th mode
Believed according to the difference and the clock from setting the internal moment based on standard wave until current in time correction portion
Number quantity, and make corrections to the internal moment.
According to above mode, in the case where receiving standard wave always using TCO signal come to the internal moment
The case where being maked corrections is compared, and workload spent by the correction at internal moment can be reduced.Although in order to obtain TCO signal and
It needs to demodulate standard wave, but in the case where the carrier wave using standard wave is to make corrections to the internal moment,
Standard wave can not also be demodulated.Therefore, by using inside the differential pair of reference frequency and the frequency of clock signal
Moment makes corrections, to be carried out always using TCO signal to the internal moment in the case where receiving standard wave
The case where correction, is compared, and workload spent by the correction at internal moment can be reduced, to be completed in a short time.
The control method of electronic watch involved in preferred mode (the 9th mode) of the invention, the electronic watch packet
Contain: receiving unit receives standard wave；And oscillating circuit, when generating in order to used in the progress timing of internal portion's moment
Clock signal, the frequency of the carrier wave for the standard wave that the electronic watch is received based on the receiving unit and clock letter
Number frequency and the oscillating circuit is controlled so that the frequency of the clock signal is close to according to the standard wave
The frequency of carrier wave and the reference frequency of determination.
According to above mode, since the carrier wave for the standard wave being managed using frequency with higher precision is come clock synchronization
The frequency of clock signal is controlled, therefore can be improved the precision at internal moment.
In the preference (the tenth mode) of the 9th mode, the electronic watch believes the reference frequency and the clock
Number the difference of frequency be determined, and the difference is based on, and control the oscillating circuit, thus so that when described
The frequency of clock signal makes corrections close to the reference frequency.
According to above mode, oscillating circuit is controlled in a manner of being cancelled fixed difference,
So as to make the frequency of clock signal close to reference frequency.
In the preference (the 11st mode) of the tenth mode, the electronic watch is based on the carrier wave from the standard wave
Reference wave generated and the clock signal, and the difference is determined.
According to above mode, by generating reference wave from the carrier wave of high-precision standard wave, so as to obtain height
The reference wave of precision.
In the preference (the 12nd mode) of the 11st mode, the electronic watch is based on the base at the first moment
First phase difference between quasi wave and the clock signal, the reference wave at the second moment and between the clock signal
Second phase is poor and time from first moment until second moment, to be determined to the difference.
According to above mode, can obtain within the time from the first moment until the second moment for difference
The first phase difference and second phase being determined are poor.By by the time from the first moment until the second moment be set as through
Spend the time before a cycle of reference frequency, so as to the shorter time compared with counter type come to difference into
Row determines.
In the preference (the 13rd mode) of the tenth mode to the 12nd mode, the electronic watch output is based on described
The control voltage of difference, the oscillating circuit vibrate the clock signal of frequency corresponding with the control voltage out.
According to above mode, the control voltage based on difference is input to oscillating circuit, thus to the frequency of clock signal
Rate makes corrections, and thus, it is possible to improve the precision at internal moment.
In the preference (the 14th mode) of the tenth mode to the 12nd mode, the oscillating circuit vibrate out with control
The clock signal of the corresponding frequency of voltage, the electronic watch include storage unit, the storage unit pair and the oscillating circuit
Accumulative actuation time and the clock signal generated in the case where having input scheduled control voltage to the oscillating circuit
The accumulative actuation time characteristic information of frequency dependence connection is stored, and the electronic watch is referring to the accumulative actuation time characteristic
Information and the error of the frequency of clock signal corresponding with the accumulative actuation time of the oscillating circuit is determined, and to support
The mode for the error that disappears generates the control voltage, and based on the difference with the difference has been determined time point at
The accumulative actuation time of the oscillating circuit and the accumulative actuation time characteristic information is updated, thus to the clock
The frequency of signal makes corrections.
According to above mode, when have passed through the time to a certain degree from being determined to difference, even if not connecing
In the case where receiving standard wave, so as to be believed using the accumulative actuation time characteristic information being updated clock
Number frequency make corrections.
In the preference (the 15th mode) of the tenth mode to the 12nd mode, the oscillating circuit vibrate out with control
The clock signal of the corresponding frequency of voltage, the electronic watch include storage unit, the storage unit pair and the oscillating circuit institute
Temperature and in the case where having input scheduled voltage to the oscillating circuit clock signal generated frequency dependence
The temperature characterisitic information of connection is stored, the electronic watch referring to the temperature characterisitic information and to the oscillating circuit
The error of the frequency of the corresponding clock signal of temperature is determined, and the control electricity is generated in a manner of offsetting the error
Pressure, and based on the difference with determined the temperature of the oscillating circuit at time point of the difference come to the temperature
Characteristic information is updated, to make corrections to the frequency of the clock signal.
According to above mode, temperature when from difference has been determined it is different at a temperature of, even if not receiving standard electric
In the case where wave, maked corrections using the temperature characterisitic information being updated to the frequency of clock signal.
In the preference (the 16th mode) of the tenth mode to the 15th mode, the electronic watch is based on the difference
With the quantity of the clock signal from setting the internal moment based on standard wave until current, to it is described internal when
Quarter makes corrections.
According to above mode, in the case where receiving standard wave always with TCO signal and to the internal moment into
The case where row correction, is compared, and load spent by the correction at internal moment can be reduced.Although in order to obtain TCO signal and need
Standard wave is demodulated, but in the case where the carrier wave using standard wave makes corrections to the internal moment, it can also
Not demodulated to standard wave.Therefore, by utilizing the moment inside the differential pair of reference frequency and the frequency of clock signal
It makes corrections, thus with being maked corrections always using TCO signal to the internal moment in the case where receiving standard wave
Situation is compared, and load spent by the correction at internal moment can be reduced, so as to be completed in a short time.
Detailed description of the invention
Fig. 1 is the perspective view of the electronic watch 1 in first embodiment.
Fig. 2 is the structure chart of the electronic watch 1 in first embodiment.
Fig. 3 is to indicate It1、Qt1、It2And Qt2Relationship figure.
Fig. 4 is the figure for indicating the flow chart of frequency correction processing.
Fig. 5 is the structure chart of the electronic watch 1 in second embodiment.
Fig. 6 is the figure for indicating the update example of accumulative actuation time characteristic information 251.
Fig. 7 is the structure chart of the electronic watch 1 in third embodiment.
Fig. 8 is the figure for indicating the update example of temperature characterisitic information 252.
Specific embodiment
Hereinafter, embodiments of the present invention will be described referring to attached drawing.But in the drawings, suitably make each portion
The size and scale bar of position are different from actual object.In addition, though since embodiments discussed below is of the invention preferred
Concrete example, therefore technically preferred various restrictions are accompanied with, as long as but in the following description not especially
Limitation of the invention is recorded, then the scope of the present invention is not limited to these modes.
A. first embodiment
Hereinafter, being illustrated to electronic watch 1 involved in first embodiment.
A.1. the summary of electronic watch 1 involved in first embodiment
In fig. 1 it is shown that the perspective view of the electronic watch in first embodiment.Electronic watch 1 utilizes the shifting of electronics
It moves and indicates the moment.As shown in Figure 1, electronic watch 1 is watch.Electronic watch 1 include watchband portion 2, button 4-1, button 4-2,
Button 4-3, housing section 6 and moment display unit 10.Moment display unit 10 includes hour hands 11, minute hand 12 and second hand 13.Moment is aobvious
Show portion 10 by the respective pointer direction of hour hands 11, minute hand 12 and second hand 13 to indicate the moment.
In fig. 2 it is shown that the structure chart of the electronic watch 1 in first embodiment.Electronic watch 1 includes storage unit
20, receiving unit 21, control unit 22, oscillating circuit 23, processing unit 24 and moment display unit 10.Control unit 22 is, for example, FPGA (existing
Field programmable gate array) or ASIC (special application integrated circuit) etc. execute the circuit of the processing as designed by designer.
Storage unit 20 is the computer-readable non-volatile recording medium write.Storage unit 20 is, for example, flash memory.Storage unit
20 are not limited to flash memory, and are able to carry out change appropriate.Storage unit 20 for example carries out program performed by processing unit 24
Storage.
Receiving unit 21 receives standard wave.Standard wave is sent as the national standard of time and frequency.Standard electric
Wave has a variety of according to the difference for the country for sending standard wave, has JJY (registered trademark) transmitted by Japan, in beauty
WWVB transmitted by Li Jian united states, the DCF77 of Germany, the MSF of Britain or BPC of China etc..In the following description, it marks
Quasi- electric wave is JJY, and the frequency of the carrier wave of JJY is set as 40kHz.Country mark of the carrier wave of standard wave based on cesium-beam atomic clock etc
Quasi- specification and be generated, and be error be ± 10-12High-precision signal.
A.2. setting at the time of realization by standard wave
Receiving unit 21 receives standard wave.The TCO signal that receiving unit 21 will demodulate the standard wave received
It exports to processing unit 24.TCO signal is, the time that second at the time of to from national standard is 0 second lights to being after one minute
Signal obtained from standard wave only is demodulated.In addition, receiving unit 1 extremely controls the standard wave received output itself
Portion 22.
Processing unit 24 is computers such as CPU (central processing unit).Processing unit 24 is responsible for the whole control of electronic watch 1
System.Processing unit 24 is stored in storage unit 20 program by reading and executing, to realize TCO lsb decoder 241, inside
Time correction portion 242 and internal moment timing unit 243.
TCO lsb decoder 241 has TCO signal institute from TCO signal extraction time encoding (temporal information), the time encoding
Date information and time information for including etc..Also, TCO lsb decoder 241 exports the time encoding extracted to the inside moment
Correcting section 242.
Internal time correction portion 242 exports the time encoding obtained from TCO lsb decoder 241 to inside moment timing unit
243, and the value based on time encoding is set to the counter of internal moment timing unit 243.The internal moment is set as a result,
It is fixed.
Internal moment timing unit 243 1Hz as obtained from being divided to the clock signal generated of oscillating circuit 23
Signal and to the internal moment carry out timing.Specifically, internal moment timing unit 243 has the second counter of several seconds, several points
The minute counter of clock and the hour counter of a few hours.Internal moment timing unit 243 counts the rotation of second hand 13 to the second
The corresponding direction of the value of device, and make the rotation of minute hand 12 extremely direction corresponding with the value of minute counter, and rotate hour hands 11
To direction corresponding with the value of hour counter.10 pairs of moment display unit internal moment show as a result,.
A.3. the correction based on standard wave and clock signal, clock signal frequency
Oscillating circuit 23 generates in order to which internal portion's moment carries out clock signal used in timing.Oscillating circuit 23 includes water
Crystal oscillator.Oscillating circuit 23 is, such as vibrates VCO (the voltage-controlled vibration of the clock signal of frequency of oscillation corresponding with control voltage out
Swing device).
The frequency and oscillating circuit 23 of the carrier wave for the standard wave that control unit 22 is received based on receiving unit 21 are generated
The frequency of clock signal, and oscillating circuit 23 is controlled, so that the frequency of clock signal is close to reference frequency f0.Benchmark frequency
Rate f0 is determined according to the carrier frequency of standard wave.In order to which to progress timing in one second, reference frequency f0 was preferably, with 2 power
Value divided after frequency become 1Hz frequency, for example, by using 32.768kHz.Hereinafter, reference frequency f0 is set as
32.768kHz。
As described above, the frequency error of the carrier wave of standard wave is minimum.Therefore, it is in the frequency of the carrier wave of standard wave
In the case where fc, frequency obtained from being f0/fc times by the frequency conversion of the carrier wave of standard wave is considered as reference frequency f0.
Hereinafter, the signal that frequency is benchmark frequency f0 is known as " reference wave ".
More specifically, the control method for the oscillating circuit 23 realized by control unit 22 is illustrated.Control unit 22 wraps
Containing determining section 221, correcting section 222 and control voltage generating unit 223.Frequency of the determining section 221 to reference frequency f0 and clock signal
Rate fVCODifference delta f v be determined.Hereinafter, by the frequency f of reference frequency f0 and clock signalVCODifference be known as " difference on the frequency
Point ".
In order to be determined to frequency differential Δ fv, determining section 221 generates reference wave according to the carrier wave of standard wave.Tool
For body, in determining section 223, as the arithmetic unit for the numerical operation for implementing conversion frequency, and vibrated using Numerical Control type
Device (NCO:Numerical Controlled Oscillator).Also, determining section 221 implements NCO to the carrier wave of standard wave
Operation, to be converted to reference wave.NCO can convert a signal into the signal of arbitrary frequency.In the present embodiment, such as
It is described above, since the frequency of the carrier wave of standard wave is 40kHz, by being by the frequency conversion of the carrier wave of standard wave
f0/(40×103) times, so as to be benchmark wave by the wave conversion of standard wave.
It is then determined portion 221 is based on the reference wave at moment t1 (example at " the first moment ") and between clock signal
The second phase between reference wave and clock signal at first phase difference, moment t2 (example at " the second moment ") it is poor and
Time PDI from moment t1 until moment t2, and frequency differential Δ fv is determined.Time, PDI was preferably less than base
The a cycle of quasi- frequency f0.Specifically, determining section 221 synthesizes reference wave with clock signal, thus after generating synthesis
Signal (referred to as I signal) and the signal (referred to as Q signal) for making I signal delay pi/2 phase.It is then determined portion 221 is according to I signal
And Q signal, and to the value I of I signal at the time of have passed through after time PDI from measuring start time at t1t1And the value of Q signal
Qt1And the value I of I signal at the time of from moment t1 further across after time PDI at t2t2And the value of Q signal
Qt2It is determined.
In fig. 3 it is shown that It1、Qt1、It2And Qt2Relationship.As shown in figure 3, I signal and Q signal are in the form of plural number
Show the phase difference between reference wave and clock signal.The phase changing capacity Δ φ of difference from first phase difference to second phaset12
It is indicated by following formula (1).
Δφt12=φt2-φt1 (1)
φt1It is first phase difference.φt2It is that second phase is poor.φt1=It1+jQt1, φt2=It2+jQt2.J is imaginary number list
Position.According to trigonometry, formula (1) is converted into following formula (2) using X=Cross/Dot.
Δφt12=tan-1(X) (2)
Here, Cross=It1×Qt2-It2×Qt1, Dot=It1×It2+Qt1×Qt2.In turn, shown by following formula (3)
Δ φ outt12。
Δφt12+ 2n π=2 π × PDI × fVCO (3)
N is 0 or more integer.Here, being set as 0 < Δ φt122 π of <, and find out be set as follows using formula (3)
The time PDI of n=0.
The frequency f of clock signalVCOAs close to reference frequency f0.Therefore, time PDI is less than one of reference frequency f0
Period, and can almost be set as n=0.But in the frequency f of clock signalVCOIn the case where greater than reference frequency f0, if when
Between PDI close to a cycle of reference frequency f0, then n may be 1 or more.It is therefore preferable that being, the time, PDI can be fully
Measure It1With It2Difference and Qt1With Qt2Difference, and time PDI is sufficiently smaller than a cycle of reference frequency f0.By can
It is set as n=0, so that operation spent by the determination of frequency differential Δ fv is simplified, also, the time spent by operation is contracted
It is short.If n=0, formula (2) and formula (3) are utilized, and indicates the frequency f of clock signal by following formula (4)VCO。
fVCO=tan-1(X)/(PDI×2π) (4)
Moreover, according to the frequency f of frequency differential Δ fv=clock signalVCOReference frequency f0, determining section 221 utilize formula
(4) frequency differential Δ fv is determined.
Explanation is back to Fig. 2.
Correcting section 222 is based on frequency differential Δ fv and controls oscillating circuit 23, thus with the frequency of clock signal
fVCOIt makes corrections close to the mode of reference frequency f0.More specifically, correcting section 222 is by controlling oscillating circuit 23
System, so that the voltage based on frequency differential Δ fv is input to oscillating circuit 23.For example, correcting section 222 is generated to control voltage
The supply of portion 223 indicates that frequency differential Δ fv is cancelled the data of such voltage.Voltage generating unit 223 is controlled to the number being supplied to
According to D/A conversion is carried out, to control voltage to shown in 23 output data of oscillating circuit.
Voltage for offsetting frequency differential Δ fv carries out more specific description.It is assumed that following situation, that is, fixed first
When, the oscillating circuit 23 for being entered voltage V0 vibrates the clock signal of reference frequency f0 out, and in the second timing, determining section 221 is right
Frequency differential Δ fv is determined.In the time longer situation from the first timing until the second timing, clock letter
Number frequency changed according to the ongoing change of oscillating circuit 23.In addition, in the temperature and the second timing of the first timing
In the case that temperature is different, the frequency of clock signal also changes.In this case, correcting section 222 is raw to control voltage
Frequency differential Δ fv is offset and is set as the frequency of clock signal at the second timing at the notice of portion 223 number of reference frequency f0
According to.For example, controlling voltage generating unit in the case where being equivalent to the size of control voltage of frequency differential Δ fv is "-Δ V "
223 outputs indicate the data of " V0- Δ V ".
Internal time correction portion 242 is set according to frequency differential Δ fv and from information at the time of being based on standard wave
The quantity of clock signal from the internal moment until current, and make corrections to the internal moment.To specific correction method into
Row explanation.It is assumed that receiving unit 21 receives standard wave, and understands from TCO lsb decoder 241 standard wave in the first timing
Extraction time encodes in TCO signal after tune, and internal time correction portion 242 correspond to time encoding and to the internal moment into
Setting is gone.In turn, it is assumed that in the first timing, the carrier wave of the standard wave that determining section 221 is received based on receiving unit 21 and when
Clock signal, and frequency differential Δ fv0 is determined, correcting section 222 makes the frequency of clock signal based on frequency differential Δ fv0
fVCOIt is consistent with reference frequency f0.And, it is assumed that at the second timing after the first timing, receiving unit 21 receives standard again
Electric wave, the carrier wave and clock signal of the standard wave that determining section 221 is received based on receiving unit 21, and to frequency differential Δ fv into
Row determines.
Internal time correction portion 242 in the case where receiving frequency differential Δ fv, to the current inside moment add from
In quantity × (1/ (f0+ Δ the fv) -1/f0) for the clock signal that the first timing carries out the internal moment to have set until current.
(1/ (f0+ Δ fv) -1/f0) indicate due to by a clock and generate away from it is correct at the time of error.For example, in Δ fv
In the case where for positive value, after the first timing, the time of a clock shortens, thus at the time of the internal moment is faster than correct.
Also, since (1/ (f0+ Δ fv) -1/f0) becomes negative value, internal time correction portion 242 is by reducing the internal moment
Value, so as to make the internal moment close to it is correct at the time of.
Fig. 4 is the figure for indicating the flow chart of frequency correction processing.Receiving unit 21 receives standard wave (step S1).Determining section
The carrier wave of 221 pairs of standard waves received implements the operation of NCO, to be converted to reference wave (step S2).
It is then determined portion 221 obtains the clock signal (step S3) of oscillating circuit 23.Also, determining section 221 is according to synthesis
The I signal and Q signal of reference wave and clock signal, and to the value I of the I signal at moment t1t1And the value Q of Q signalt1It carries out
It detects (step S4).It is next determined that the value I of the I signal at 221 pairs of portion moment t2t2And the value Q of Q signalt2Detected (step
Rapid S5).Then, it is determined that portion 221 is based on It1、Qt1、It2、Qt2And time PDI, and using formula (4) and to frequency differential Δ fv
It is determined (step S6).
Correcting section 222 is based on frequency differential Δ fv and to the frequency f of clock signalVCOMaked corrections (step S7).In step
For S7 after processing terminate, electronic watch 1 terminates a series of processing.
A.4. the effect of first embodiment
As indicated above, the frequency f of the frequency and clock signal of carrier wave of the control unit 22 based on standard waveVCO, and to vibration
It swings circuit 23 to be controlled, so that the frequency f of clock signalVCOClose to reference frequency f0.In this way, due to utilizing High-Accuracy Frequency
The carrier wave for the standard wave that ground is managed and frequency f to clock signalVCOIt is controlled, therefore by receiving standard wave
Always to the frequency f of clock signalVCOIt makes corrections, at the time of so as to make the internal moment persistently indicate correct.In addition, such as
Described above, TCO signal lights one point until it have passed through one minute with the time that the second from the national standard at the time of is 0 second
Clock indicates time information.Therefore, it when in a part during have passed through one minute standard wave can not be received, receives
Portion 21 can not demodulate standard wave, to be unable to get TCO signal.As a result, electronic watch 1 can not to it is internal when
Quarter is set.Therefore, until obtaining TCO signal, the precision at internal moment can be reduced.For example, being influenced by noise etc.
And the receiving intensity of standard wave the case where temporarily reducing, meets such case.
However, in the first embodiment, even a part can not received standard wave, by with can receive
The carrier wave of partial standard wave and always to the frequency f of clock signalVCOIt makes corrections, to also the internal moment can be made to hold
At the time of continued shows correct.If being capable of frequency f to clock signalVCOIt is maked corrections and by frequency differential Δ fv/ reference frequency
F0 maintains ± 0.03ppm (parts per million), then can be realized year difference is ± 1 second.
In addition, determining section 221 is determined the frequency differential Δ fv of the frequency of reference frequency f0 and clock signal, correction
The frequency differential Δ fv based on determined by determining section 221 of portion 222, and oscillating circuit 23 is controlled, so that so that clock is believed
Number frequency fVCOMode close to reference frequency f0 makes corrections.Correcting section 222 passes through in a manner of offsetting frequency differential Δ fv
Oscillating circuit 23 is controlled, so as to make the frequency f of clock signalVCOClose to reference frequency f0.
In addition, determining section 221 implements the operation of NCO to the carrier wave of standard wave, to be transformed to reference wave.As a result, can
Access high-precision reference wave.
In addition, determining section 221 be based on that first phase difference, second phase be poor and time PDI and to frequency differential Δ fv into
Row determines.The mode being determined based on phase difference to frequency differential Δ fv, can be short within several ms to several seconds
With ± 10 in time-7Precision and frequency differential Δ fv/ reference frequency f0 is determined.
To the case where capable of being carried out in a short time based on phase difference to the mode that frequency differential Δ fv is determined into
Row explanation.In the mode being determined based on phase difference to frequency differential Δ fv, in order to find out the X in above-mentioned formula (2), and from
It measures from the time by moment t2, it is therefore desirable to the time of time PDI × 2.Due to time PDI to a length of about 1/ benchmark frequency
Rate f0, therefore become time PDI × 2=2/ (32.768 × 1030.06 millisecond of)=about.According to the above, it is being based on phase
Difference and in the mode that is determined to frequency differential Δ fv, time PDI × 2 are to a length of 0.06 millisecond, even if to add formula (4)
Operation spent by the time, can also implement in such short time within several ms to several seconds.
In contrast, the mode as the difference for obtaining two frequencies, has following so-called counter type, that is,
Within n (n is natural number) times of a cycle for the frequency that will be used as benchmark of time, to another several frequency
The period of rate is counted and is determined to another frequency.But in counter type, it is intended to the precision with ppm and right
When frequency differential Δ fv/ reference frequency f0 is determined, it may be desirable to the long time.More specifically, by counter type
Quantity of the obtained precision dependent on the clock of another frequency in certain time.Therefore, it is improved in counter type
Precision needs to increase the quantity of the clock of another frequency, it is therefore desirable to increase n, thus this low frequency of 32.768kHz not
It is practical.In this way, compared with counter type, it can be in short-term to the frequency differential Δ fv method being determined based on phase difference
Interior implementation.
By that can be determined in a short time to frequency differential Δ fv, to implement the benefit at internal moment in a short time
Just become easy.
In addition, correcting section 222 passes through so that the control voltage based on frequency differential Δ fv is input into oscillating circuit 23
Mode oscillating circuit 23 is controlled, so that the frequency to clock signal makes corrections.It is based on frequency differential Δ fv as a result,
Voltage be input into oscillating circuit 23, being capable of frequency f to clock signalVCOIt makes corrections, so that the internal moment can hold
At the time of continued shows correct.
In addition, internal time correction portion 242 sets the internal moment based on frequency differential Δ fv and from based on standard wave
It plays the quantity of the clock signal until current and makes corrections to the internal moment.As a result, and in the feelings for receiving standard wave
The case where being set always using TCO signal to the internal moment under condition is compared, and electronic watch 1 can reduce the internal moment
The spent workload of correction.Specifically, in order to obtain TCO signal and need to demodulate standard wave, but in benefit
In the case where being maked corrections with the carrier wave of standard wave to the internal moment, standard wave can not also be demodulated.Therefore,
By being maked corrections using the difference of reference frequency and the frequency of clock signal to the internal moment, thus with standard electric is being received
The case where being maked corrections always with TCO signal to the internal moment in the case where wave is compared, and the correction institute at internal moment can be reduced
The workload of consuming, thus, it is possible to terminate in a short time.
In addition, in the case where being set with TCO signal to the internal moment, in JJY, as noted previously, as to TCO
Signal, which send, will spend one minute, therefore is set to the internal moment and at least to expend one minute or more.In contrast,
In the case where being maked corrections with frequency differential Δ fv to the internal moment, can within the short time within several ms to several seconds into
The determination of line frequency difference delta f v.
B. second embodiment
Typically, since absorption of the generated dust to quartz crystal in the hermetic container of oscillating circuit 23
With fall off, adhesive used in environmental change caused by some degasification or oscillating circuit 23 with variation of time etc.,
To which the frequency of clock signal generated in the case where having input scheduled control voltage can change.Therefore,
In two embodiments, electronic watch 1 is pre- with having input with the accumulative actuation time of oscillating circuit 23, He Xiang oscillating circuit 23
(the ginseng of accumulative actuation time characteristic information 251 of the frequency dependence connection of clock signal generated in the case where fixed control voltage
According to Fig. 5), correcting section 222 is updated accumulative actuation time characteristic information 251 using frequency differential Δ fv.Accumulative movement
Characteristic shown in time response information 251 is so-called aging characteristics.Voltage generating unit 223 is controlled to pass through so that by updated
Add up the mode that degradation characteristic caused by actuation time is cancelled shown in accumulative actuation time characteristic information 251 and generates control
Voltage, to make corrections to the frequency of the clock signal of oscillating circuit 23.Hereinafter, being illustrated to second embodiment.This
Outside, each mode illustrated by following and change in example, for effect, function and the same element of first embodiment, continue to use
Label used in the first embodiment and suitably omit respective detailed description.
B.1. the summary of electronic watch 1 involved in second embodiment
The structure chart of the electronic watch 1 in second embodiment is shown in Fig. 5.Electronic watch 1 also comprising storage unit 25 with
And temperature sensor 26.Control unit 22 includes accumulative actuation time measurement unit 224.
Storage unit 25 is read-write non-volatile recording medium.Storage unit 25 is, for example, EEPROM
(Electrically Erasable Programmable Read-Only Memory: the read-only storage of electrically erasable
Device).Storage unit 25 is not limited to EEPROM, and is able to carry out change appropriate.Storage unit 25 includes accumulative actuation time characteristic
Information 251 and temperature characterisitic information 252.
Temperature sensor 26 measures the temperature of oscillating circuit 23.Accumulative actuation time measurement unit 224 is to from oscillation
Circuit is loaded into electronic watch 1 and being measured by the time of lighting of time for starting to be acted.Therefore, when adding up movement
Between the time that is measured of measurement unit 224 indicate accumulative actuation time of oscillating circuit 23.
Accumulative actuation time characteristic information 251 indicate accumulative actuation time of oscillating circuit 23 with defeated to oscillating circuit 23
The relationship of the frequency of clock signal generated in the case where scheduled control voltage is entered.Scheduled voltage is, such as is tiring out
Meter actuation time vibrates the voltage V0 of the clock signal of reference frequency f0 out in the case where being 0.Accumulative actuation time characteristic information
251 have two ways.When accumulative actuation time characteristic information 251 in first method indicates the accumulative movement of oscillating circuit 23
Between relationship with the frequency itself of clock signal generated in the case where having input from voltage V0 to oscillating circuit 23.Second party
Accumulative actuation time characteristic information 251 in formula indicates that the accumulative actuation time of oscillating circuit 23 inputs with to oscillating circuit 23
The frequency f of clock signal generated in the case where voltage V0VCOFrequency error Δ fe relationship.Frequency error Δ fe
(example of " error of the frequency of clock signal ") is the frequency f of clock signalVCOWith the difference of reference frequency f0.Hereinafter,
Accumulative actuation time characteristic information 251 is set as second method.
Frequency f of the frequency differential Δ fv and frequency error Δ fe in reference frequency f0 and clock signalVCODifference this point
On be consistent.But in order to become apparent the following description, difference determined by determining section 221 is known as " difference on the frequency
Point ", and the difference in accumulative actuation time characteristic information 251 and temperature characterisitic information 252 will be stored in and be known as " frequency mistake
Difference ".
For example, accumulative actuation time characteristic information 251 be directed to accumulative actuation time be one month, two months ..., one
Year ..., n be illustrated respectively in the frequency mistake of clock signal generated in the case where having input from voltage V0 to oscillating circuit 23
Poor Δ fe.Frequency error Δ fe shown in accumulative actuation time characteristic information 251 is, for example, to vibration identical with oscillating circuit 23
Swing value obtained from circuit is tested.
Temperature characterisitic information 252 indicates the temperature change of the quartz crystal in oscillating circuit 23 and the characteristic that generates.Temperature
It characteristic information 252 and the resulting temperature of oscillating circuit 23 and is given birth in the case where having input scheduled voltage to oscillating circuit 23
At clock signal frequency dependence connection.Scheduled voltage is, for example, voltage V0.Temperature characterisitic information 252 has two ways.
Temperature characterisitic information 252 in first method indicates the resulting temperature of oscillating circuit 23 and is having input voltage to oscillating circuit 23
The relationship of the frequency itself of clock signal generated in the case where V0.Temperature characterisitic information 252 in second method indicates vibration
Swing the frequency of the resulting temperature of circuit 23 with clock signal generated in the case where having input voltage V0 to oscillating circuit 23
fVCOWith the relationship of the frequency error Δ fe of reference frequency f0.Hereinafter, temperature characterisitic information 252 is set as second method.
For example, temperature characterisitic information 252 for 10 DEG C, 15 DEG C, 20 DEG C, 25 DEG C, 30 DEG C, 35 DEG C etc. and be illustrated respectively in
Oscillating circuit 23 has input the frequency error Δ fe of clock signal generated in the case where voltage V0.Temperature characterisitic information 252
Shown in frequency error Δ fe be, for example, oscillating circuit identical with oscillating circuit 23 is tested obtained from value.
The frequency differential Δ fv based on determined by determining section 221 of correcting section 222 and determining section 221 have determined frequency differential Δ
The accumulative actuation time of oscillating circuit 23 at the time point of fv, and accumulative actuation time characteristic information 251 is updated, from
And it makes corrections to the frequency of clock signal.Using Fig. 6, to the update example of specific accumulative actuation time characteristic information 251 into
Row explanation.
In fig. 6 it is shown that indicating the figure of the update example of accumulative actuation time characteristic information 251.Curve graph shown in fig. 6
600 indicate frequency error Δ fe corresponding with the accumulative actuation time of oscillating circuit 23.Accumulative movement shown in curve graph 600
Time response 601 be the update realized as correcting section 222 before accumulative actuation time characteristic information 251 shown in characteristic.With
The process of time, frequency error Δ fe become 0 other than value the reasons why be, in the hermetic container of oscillating circuit 23
Generated dust to quartz crystal absorption with fall off, environmental change caused by some degasification or oscillating circuit 23 are made
Adhesive with the time variation etc..In the example shown in Fig. 6, although at the time point of manufacture frequency error at
For Δ fe=0, but with time going by, frequency error Δ fe becomes larger in a negative direction.More specifically, when adding up movement
Between characteristic information 251 show, accumulative actuation time be time ti1 in the case where become frequency error Δ fe0ti1, and tired
Become frequency error Δ fe0 in the case where actuation time is counted as time ti2ti2The case where.
In the case where accumulative actuation time is first time, it is set as determining section 221 and frequency differential Δ fv has been carried out really
It is fixed.The frequency error Δ fe of the first time of accumulative actuation time characteristic information 251 is updated to and frequency differential by correcting section 222
The identical value of Δ fv.At this point, being stored to value obtained from the frequency error Δ fe before updating is subtracted from frequency differential Δ fv.
Correcting section 222 adds institute to the frequency error Δ fe at the time other than the first time of accumulative actuation time characteristic information 251
The value of storage.
The update example of specific accumulative actuation time characteristic information 251 is illustrated.It is assumed that being in accumulative actuation time
In the case where time ti1, determining section 221 is to frequency differential Δ fvti1It is determined.Correcting section 222 is special by accumulative actuation time
The frequency error Δ fe0 of the time ti1 of property information 251ti1It is updated to frequency error Δ feti1.Frequency error Δ feti1It is and frequency
Rate difference delta f vti1Identical value.In addition, correcting section 222 to other than the time ti1 of accumulative actuation time characteristic information 251 when
Between frequency error Δ fe add frequency differential Δ fvti1Frequency error Δ fe0ti1.Add up shown in curve graph 600 dynamic
Making time response 602 is characteristic shown in updated accumulative actuation time characteristic information 251.Accumulative actuation time characteristic 602
It is that accumulative actuation time characteristic 601 has moved in parallel frequency differential Δ fvti1Frequency error Δ fe0ti1Characteristic afterwards.For example, mending
Frequency error Δ fe0 of the positive portion 222 to the time ti2 of accumulative actuation time characteristic information 251ti2In addition frequency differential Δ fvti1-
Frequency error Δ fe0ti1, and as shown in fig. 6, it is updated to frequency error Δ feti2。
Explanation is back to Fig. 5.
Voltage generating unit 223 is controlled using updated accumulative actuation time characteristic information 251 and when to accumulative movement
Between corresponding frequency error Δ fe of accumulative actuation time current shown in measurement unit 224tiIt is determined.In turn, voltage is controlled
Generating unit 223 is using temperature characterisitic information 252 and to frequency error corresponding with temperature current shown in temperature sensor 26
ΔfeteIt is determined.
Also, voltage generating unit 223 is controlled so that frequency error Δ fetiWith frequency error Δ feteThe mode being cancelled is raw
At control voltage, and by generated control voltage output to oscillating circuit 23.For example, control voltage generating unit 223 generates
Voltage V0- Δ Vti- Δ Vte is controlled, so that frequency error Δ fetiWith frequency error Δ feteIt is cancelled.It is equivalent to frequency error
ΔfetiControl voltage size be "-Δ Vti ".It is equivalent to frequency error Δ feteControl voltage size be "-Δ
Vte”。
B.2. the effect of second embodiment
As indicated above, correcting section 222 based on frequency differential Δ fv and has determined at time point of frequency differential Δ fv
The accumulative actuation time of oscillating circuit 23 and accumulative actuation time characteristic information 251 is updated, thus to clock signal
Frequency makes corrections.Electronic clock 1 is when have passed through a period of time from determining frequency differential Δ fv as a result, even if not connecing
It, also can be using the accumulative actuation time characteristic information 251 after being updated and to clock signal in the case where receiving standard wave
Frequency make corrections.
C. third embodiment
In this second embodiment, correcting section 222 is updated accumulative actuation time characteristic information 251, controls voltage
Caused by generating unit 223 passes through so as to add up actuation time by shown in updated accumulative actuation time characteristic information 251
Deteriorate the mode being cancelled and generate control voltage, to make corrections to the frequency of the clock signal of oscillating circuit 23.Another party
Face, in the third embodiment, correcting section 222 are updated temperature characterisitic information 252, and control voltage generating unit 223 passes through
Control voltage is generated in a manner of being cancelled temperature change shown in updated temperature characterisitic information 252, and to oscillation electricity
The frequency of the clock signal on road 23 makes corrections.Third embodiment is illustrated below.In addition, each illustrated by following
In mode and variation, for effect, function and the same element of second embodiment, continues to use and use in this second embodiment
Label and suitably omit respective detailed description.
C.1. the summary of electronic watch 1 involved in third embodiment
In fig. 7 it is shown that the structure chart of the electronic watch 1 in third embodiment.Correcting section 222 is based on determining section
The oscillating circuit at time point that frequency differential Δ fv and determining section 221 determined by 221 are determined frequency differential Δ fv
23 temperature, and temperature characterisitic information 252 is updated, so that the frequency to clock signal makes corrections.It is right using Fig. 8
The update example of specific temperature characterisitic information 252 is illustrated.
In fig. 8 it is shown that indicating the figure of the update example of temperature characterisitic information 252.Curve graph 800 shown in Fig. 8 indicates
Frequency error Δ fe corresponding with the temperature of oscillating circuit 23.Temperature characterisitic 801 shown in curve graph 800 is by correcting section
222 implement characteristic shown in the temperature characterisitic information 252 before correction.In the example shown in Fig. 8, it is adapted to 1 institute of electronic clock
The environment used, at 25 DEG C, frequency error becomes Δ fe=0, and as far from 25 DEG C, frequency error Δ fe is in negative direction
On become larger.More specifically, temperature characterisitic information 252 is shown, the frequency error in the case where temperature te1 of oscillating circuit 23
As Δ fe0te1, and become frequency error Δ fe0 in the case where the temperature of oscillating circuit 23 is temperature te2te2The case where.
In the case where the temperature of oscillating circuit 23 is the first temperature, it is set as determining section 221 and frequency differential Δ fv is carried out
It determines.Frequency error Δ fe at first temperature of temperature characterisitic information 252 is updated to and frequency differential Δ fv by correcting section 222
Identical value.At this point, being stored to value obtained from the frequency error Δ fe before updating is subtracted from frequency differential Δ fv.Correction
Portion 222 adds stored value to the frequency error Δ fe at the temperature other than the first temperature of temperature characterisitic information 252.
It is assumed that determining section 221 is to frequency differential Δ fv in the case where the temperature of oscillating circuit 23 is temperature te1te1It carries out
It determines.Correcting section 222 is by the frequency error Δ fe0 at the temperature te1 of temperature characterisitic information 252te1It is updated to frequency error Δ
fete1.Frequency error Δ fetie1For with frequency differential Δ fvte1Identical value.In addition, correcting section 222 is to temperature characterisitic information
The frequency error Δ fe at temperature other than 252 temperature te1 adds frequency differential Δ fvte1Frequency error Δ fe0te1.Curve
Temperature characterisitic 802 shown in Figure 80 0 is characteristic shown in updated temperature characterisitic information 252.Temperature characterisitic 802 is temperature
Characteristic 801 has moved in parallel frequency differential Δ fvte1Frequency error Δ fe0te1Characteristic afterwards.For example, correcting section 222 is to temperature
The frequency error Δ fe0 of the time te2 of characteristic information 252te2In addition frequency differential Δ fvte1Frequency error Δ fe0te1, and
As shown in figure 8, being updated to frequency error Δ fete2。
It is back to the explanation of Fig. 7.
Voltage generating unit 223 is controlled using accumulative actuation time characteristic information 251 and to accumulative actuation time measurement unit
Current corresponding frequency error Δ fe of accumulative actuation time shown in 224tiIt is determined.In turn, voltage generating unit 223 is controlled
Using updated temperature characterisitic information 252 to frequency error Δ corresponding with temperature current shown in temperature sensor 26
feteIt is determined.Since the processing of control voltage generating unit 223 later is identical as second embodiment, and the description is omitted.
C.2. the effect of third embodiment
As indicated above, correcting section 222 based on fixed frequency differential Δ fv and determined frequency differential Δ fv when
Between oscillating circuit 23 at point temperature and temperature characterisitic information 252 is updated, so that the frequency to clock signal carries out
Correction.Electronic clock 1 is at a temperature of different from temperature when frequency differential Δ fv has been determined as a result, even if not receiving mark
In the case where quasi- electric wave, it can also be maked corrections using the temperature characterisitic information 252 being updated to the frequency of clock signal.
D. change example
Above each mode can be deformed with various ways.The mode illustrated below specifically deformed out.Each other not
In the range of contradiction, suitably the two or more modes arbitrarily selected from example below can be merged.In addition,
In the change example illustrated by following, for effect, function and the same element of embodiment, continues to use and joined in above explanation
According to symbol and suitably omit respective detailed description.
Although in above each mode, it is assumed that each receiving unit 21 receives electric wave to the frequency f of clock signalVCO
It makes corrections, but be not restricted to that this.It such as can also be in the following way, that is, even if receiving unit 21 receives electric wave, also not
It is the frequency f every time to clock signalVCOIt makes corrections, but intermittently, such as it is primary per correction several times.Even with this
Kind mode, with the frequency f to clock signalVCOIt is compared without the case where any correction, also can be improved the essence at internal moment
Degree.
Although standard wave is that the frequency of the carrier wave of JJY and JJY is 40kHz, and unlimited in above each mode
In this.In above each mode, even if the frequency of the carrier wave of JJY is that 60kHz can be also applicable in, even if standard wave be WWVB,
DCF77, MSF or BPC etc. can be also applicable in.
It, can also although being benchmark frequency f0 by the frequency conversion of the carrier wave of standard wave in above each mode
Clock signal to be converted to the frequency of the carrier wave of standard wave.But due to not knowing the accurate frequency of clock signal, because
This electronic watch 1 also can use NCO and the frequency of clock signal made to become (frequency/reference frequency of the carrier wave of standard wave
F0) again, and frequency differential Δ fv is determined.Alternatively, in above each mode, it can also be in the following way, that is, will
The carrier wave and clock signal of standard wave are respectively converted into reference frequency f0 and the frequency different from the frequency of the carrier wave of standard wave
Rate, and frequency differential Δ fv is determined.
It, can also be in the following way in above each mode, that is, electronic watch 1 is according to the standard wave received
Number, and determine be maked corrections using TCO signal to the internal moment, or using frequency differential Δ fv come to it is internal when
Quarter makes corrections.For example, electronic watch 1 can also be divided by the remainder of scheduled natural number in the number for receiving standard wave
It is maked corrections using TCO signal to the internal moment in the case where 1, and utilizes frequency differential Δ in the case where remainder is not 1
Fv makes corrections to the internal moment.In addition, electronic watch 1 can also be as one week or one month per scheduled period benefit
Maked corrections with frequency differential Δ fv to the internal moment, and during these between using TCO signal and to the internal moment into
Row correction.Alternatively, it is also possible in the following way, that is, processing unit 24 obtains user to button 4-1, button 4-2 or button 4-3
The operation signal exported when being operated, and processing unit 24 determines it is right using TCO signal based on operation signal
The internal moment makes corrections, or is maked corrections using frequency differential Δ fv to the internal moment.Alternatively, it is also possible to using as follows
Mode, that is, processing unit 24 regularly makes corrections to the internal moment using TCO signal, when processing unit 24 obtains user to pressing
It is internal using frequency differential Δ fv when the operation signal that button 4-1, button 4-2 or button 4-3 are exported when being operated
Portion makes corrections at the moment.
In above each mode, electronic watch 1 can also be according at the time of receiving standard wave and receiving standard
The number of electric wave and determine be maked corrections using TCO signal to the internal moment, or using frequency differential Δ fv come internally
Portion makes corrections at the moment.For example, electronic watch 1 can also be utilized in the case where some month first time receiving standard wave
TCO signal and make corrections to the internal moment, and after second using frequency differential Δ fv and to it is internal when
Quarter makes corrections.
In above each mode, electronic watch 1 is not limited to watch shown in FIG. 1, is also possible to table clock or wall clock etc..
In addition, the display mode of electronic watch 1 is not limited to shown in FIG. 1 analog, it is also possible to digital.In electronic watch 1
In the case that display mode is digital, electronic watch 1 can also have been tied when making corrections to clock frequency to indicating to make corrections
The image of beam is shown.
In above each mode, it is understood that be to be constituted in a manner of making above-mentioned control unit 22 play a role
Computer program or the computer readable recording medium that the computer program is recorded.Recording medium is, for example, nonvolatile
Property recording medium, other than it may include the optical recordings medium such as CD-ROM, can also comprising semiconductor recording medium,
Arbitrary recording medium well known to magnetic recording media etc..In addition, the present invention is also determined as electronics involved in above-mentioned each mode
The control method of clock and watch.
Although in above each mode, control unit 22 by execute program be implemented element all or part of both
It can be realized by circuits such as such as FPGA or ASIC and using hardware, but can also cooperating come real by software and hardware
It is existing.Control unit 22 is also possible to multiple circuits either a circuit.Although describing internal time correction portion 242 to pass through
Processing unit 24 executes program to realize, but internal time correction portion 242 also may be embodied in control unit 22.
Symbol description
1: electronic watch；10: moment display unit；11: hour hands；12: minute；13: second hand；20: storage unit；21: receiving unit；
22: control unit；221: determining section；222: correcting section；223: control voltage generating unit；224: accumulative actuation time measurement unit；23:
Oscillating circuit；24: processing unit；241:TCO lsb decoder；242: internal time correction portion；243: internal moment timing unit；25: depositing
Storage portion；251: accumulative actuation time characteristic information；252: temperature characterisitic information；26: temperature sensor.
Claims (19)
1. a kind of electronic watch, characterized by comprising:
Receiving unit receives standard wave；
Oscillating circuit generates in order to which internal portion's moment carries out clock signal used in timing；And
Control unit, the frequency of the carrier wave of the standard wave received based on the receiving unit and the frequency of the clock signal
Rate and the oscillating circuit is controlled so that the frequency of the clock signal is close to according to the carrier wave of the standard wave
Frequency and the reference frequency of determination.
2. electronic watch as described in claim 1, which is characterized in that
The control unit is determined the difference of the reference frequency and the frequency of the clock signal, and is based on the difference
And the oscillating circuit is controlled, thus by make the frequency of the clock signal close to come in a manner of the reference frequency into
Row correction.
3. electronic watch as claimed in claim 2, which is characterized in that
The control unit carries out the difference true based on reference wave and the clock signal that frequency is the reference frequency
It is fixed.
4. electronic watch as claimed in claim 3, which is characterized in that
The control unit is based on the reference wave at the first moment and when the first phase difference between the clock signal, second
Between the reference wave and the clock signal at quarter second phase difference and from first moment to described second
Time until moment, and the difference is determined.
5. electronic watch as claimed in claim 2, which is characterized in that
The control unit exports the control voltage based on the difference,
The oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
6. electronic watch as claimed in claim 4, which is characterized in that
The control unit exports the control voltage based on the difference,
The oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
7. electronic watch as claimed in claim 2, which is characterized in that
The oscillating circuit vibrates the clock signal of frequency corresponding with control voltage out,
The electronic watch includes storage unit, and the storage unit pair is with the accumulative actuation time of the oscillating circuit and in Xiang Suoshu
When oscillating circuit has input the accumulative movement of the frequency dependence connection of clock signal generated in the case where scheduled control voltage
Between characteristic information stored,
The control unit is referring to the accumulative actuation time characteristic information and to the accumulative actuation time phase with the oscillating circuit
The error of the frequency for the clock signal answered is determined, and the control voltage is generated in a manner of offsetting the error, and
Based on the difference and determined the difference time point place the oscillating circuit accumulative actuation time and to it is described tire out
Meter actuation time characteristic information is updated, to make corrections to the frequency of the clock signal.
8. electronic watch as claimed in claim 2, which is characterized in that
The oscillating circuit vibrates the clock signal of frequency corresponding with control voltage out,
The electronic watch includes storage unit, the storage unit pair and the resulting temperature of the oscillating circuit and to the oscillation
The temperature characterisitic information that circuit has input the frequency dependence connection of clock signal generated in the case where scheduled voltage is deposited
Storage,
The control unit is referring to the temperature characterisitic information and to the frequency of clock signal corresponding with the temperature of the oscillating circuit
The error of rate is determined, and the control voltage is generated in a manner of offsetting the error, and based on the difference and really
The temperature of the oscillating circuit at the time point of the difference is determined and the temperature characterisitic information has been updated, thus right
The frequency of the clock signal makes corrections.
9. electronic watch as claimed in claim 2, which is characterized in that
Comprising internal time correction portion, the internal time correction portion is based on the difference and sets institute from based on standard wave
The quantity of the clock signal from the internal moment until current is stated, to make corrections to the internal moment.
10. a kind of control method of electronic watch, the electronic watch includes: receiving unit, receives standard wave；And oscillation
Circuit generates in order to which internal portion's moment carries out clock signal used in timing,
The control method of the electronic watch is characterized in that,
The frequency and the clock signal of the carrier wave for the standard wave that the electronic watch is received based on the receiving unit
Frequency, and the oscillating circuit is controlled, so that the frequency of the clock signal is close to according to the standard wave
The frequency of carrier wave and the reference frequency of determination.
11. the control method of electronic watch as claimed in claim 10, which is characterized in that
The electronic watch is determined the difference of the reference frequency and the frequency of the clock signal, and is based on the difference
Point, and the oscillating circuit is controlled, thus by make the frequency of the clock signal close to the reference frequency in a manner of
To make corrections.
12. the control method of electronic watch as claimed in claim 11, which is characterized in that
The electronic watch carries out the difference based on the reference wave and the clock signal that frequency is the reference frequency
It determines.
13. the control method of electronic watch as claimed in claim 12, which is characterized in that
The electronic watch is based on the reference wave at the first moment and the first phase difference between the clock signal, second
Second phase difference between the reference wave and the clock signal at moment and from first moment to described the
Time until two moment, and the difference is determined.
14. the control method of electronic watch as claimed in claim 11, which is characterized in that
The electronic watch exports the control voltage based on the difference,
The oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
15. the control method of electronic watch as claimed in claim 12, which is characterized in that
The electronic watch exports the control voltage based on the difference,
The oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
16. the control method of electronic watch as claimed in claim 13, which is characterized in that
The electronic watch exports the control voltage based on the difference,
The oscillating circuit vibrates the clock signal of frequency corresponding with the control voltage out.
17. the control method of electronic watch as claimed in claim 11, which is characterized in that
The oscillating circuit vibrates the clock signal of frequency corresponding with control voltage out,
The electronic watch includes storage unit, and the storage unit pair is with the accumulative actuation time of the oscillating circuit and in Xiang Suoshu
When oscillating circuit has input the accumulative movement of the frequency dependence connection of clock signal generated in the case where scheduled control voltage
Between characteristic information stored,
The electronic watch is referring to the accumulative actuation time characteristic information and to the accumulative actuation time with the oscillating circuit
The error of the frequency of corresponding clock signal is determined, and the control voltage is generated in a manner of offsetting the error, and
And based on the difference with the difference has been determined time point at the oscillating circuit accumulative actuation time and to described
Accumulative actuation time characteristic information is updated, to make corrections to the frequency of the clock signal.
18. the control method of electronic watch as claimed in claim 11, which is characterized in that
The oscillating circuit vibrates the clock signal of frequency corresponding with control voltage out,
The electronic watch includes storage unit, and the storage unit pair is with the resulting temperature of the oscillating circuit and to the oscillation
The temperature characterisitic information that circuit inputs the frequency dependence connection of clock signal generated in the case where scheduled voltage is stored,
The electronic watch is referring to the temperature characterisitic information and to clock signal corresponding with the temperature of the oscillating circuit
The error of frequency is determined, and the control voltage is generated in a manner of offsetting the error, and based on the difference with
The temperature of the oscillating circuit at the time point of the difference has been determined and the temperature characterisitic information has been updated, thus
It makes corrections to the frequency of the clock signal.
19. the control method of electronic watch as claimed in claim 11, which is characterized in that
The electronic watch is based on the difference and from setting the internal moment based on standard wave until current
The quantity of clock signal, and make corrections to the internal moment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-250310 | 2017-12-27 | ||
| JP2017250310A JP2019117080A (en) | 2017-12-27 | 2017-12-27 | Electronic timepiece and method for controlling electronic timepiece |
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| Publication Number | Publication Date |
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| CN109976139A true CN109976139A (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811581715.5A Pending CN109976139A (en) | 2017-12-27 | 2018-12-24 | The control method of electronic watch and electronic watch |
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| CN (1) | CN109976139A (en) |
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| JP2019117080A (en) | 2019-07-18 |
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Application publication date: 20190705 |