CN101344760A - Time adjustment device, timekeeping device with a time adjustment device, and a time adjustment method - Google Patents

Time adjustment device, timekeeping device with a time adjustment device, and a time adjustment method Download PDF

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Publication number
CN101344760A
CN101344760A CNA2008101376651A CN200810137665A CN101344760A CN 101344760 A CN101344760 A CN 101344760A CN A2008101376651 A CNA2008101376651 A CN A2008101376651A CN 200810137665 A CN200810137665 A CN 200810137665A CN 101344760 A CN101344760 A CN 101344760A
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satellite
mentioned
signal
information
time
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Chinese (zh)
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松崎淳
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Seiko Epson Corp
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Seiko Epson Corp
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Abstract

The invention provides a time adjustment device which obtains time information from a position information satellite meanwhile restrains maximum of power consumption. The time adjustment device has a reception unit that receives satellite signals transmitted from a positioning information satellite; a satellite signal processing unit that processes the satellite signal received by the reception unit and acquires at least satellite time information; a timekeeping unit that keeps time internally; and a time information adjustment unit that adjusts the internal time based on the satellite time information, wherein the reception unit and the satellite signal processing unit operate alternatively.

Description

Time correction device, time set and time adjustment method
Technical field
The present invention relates to time set and time adjustment method according to the time correction device that carries out time correction from the signal of position information satellites such as for example gps satellite, band time correction device.
Background technology
The system that is used for measuring self-position is GPS (Global Positioning System) system, adopts the gps satellite that has around geocyclic track.This gps satellite has atomic clock.Thereby gps satellite has time information (GPS constantly) very accurately.
Reception, needs to receive from (the Time of Week) signal of the TOW in the signal of gps satellite (for example patent documentation 1) in order to obtain the time information of gps satellite from the receiver side of the signal of gps satellite.The TOW signal be GPS constantly, be since week what show weekly at first is the information of unit with the second.
In order to receive this time information, need to catch around geocyclic gps satellite, receive this signal that captures and obtain relevantly etc., obtain data constantly by computing then.
Specifically, receive gps signal, this conversion of signals is become intermediate frequency etc. by RF (Radio Frequency) by antenna.Then, obtain relevant the grade and the extraction gps signal by base band part, operational part carries out computing to the gps signal that extracts, and takes out time information.
[patent documentation 1] Japanese kokai publication hei 10-10251 communique (summary etc.)
Therefore, in order after receiving gps satellite, to obtain time information practically, antenna part, RF portion, base band part, operational part etc. are moved simultaneously.Thereby the peak value of the consumed power of receiver side uprises, and for example, reaches about tens milliamperes.
In order to ensure such peak power, need to strengthen battery size.But time sets such as clock require miniaturization, therefore can't strengthen battery size.Its result exists equipment such as clock to produce the problem of system-down etc.
Summary of the invention
The objective of the invention is to, provide a kind of and can suppress the maximal value of consumed power and obtain the time correction device of time information, the time set and the time adjustment method of band time correction device from position information satellites such as gps satellites.
According to the present invention, above-mentioned problem realizes that by the time correction device this time correction device is characterised in that to have: acceptance division, and it receives from the next satellite-signal of positional information satellite transmission; The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least; Timing portion, it has self time information; And the time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information, and above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action.
According to said structure, acceptance division and satellite-signal operational part are selected ground action, therefore, can suppress the rising of the maximum power value (peak power value) of time set.
In addition, the satellite-signal that receives when moving according to acceptance division, satellite-signal operational part carry out the computing action, thereby can obtain the satellite time information.And, can proofread and correct self time information according to this satellite time information.
Like this, in the structure of the present invention, can suppress the maximal value of consumed power and obtain time information from position information satellites such as gps satellites.
Preferably, above-mentioned time correction device is characterised in that above-mentioned acceptance division has: frequency processing portion, and its frequency to the above-mentioned satellite-signal that receives is carried out conversion process; And demodulation process portion, it is to carrying out demodulation process by the above-mentioned satellite-signal after the said frequencies handling part conversion process, and said frequencies handling part, above-mentioned demodulation process portion or above-mentioned satellite-signal operational part be action selectively respectively.
According to said structure, frequency processing portion, demodulation process portion or satellite-signal operational part be action selectively respectively, therefore, can suppress the rising of the maximum power value (peak power value) of time set.
In addition, carry out satellite-signal after the demodulation according to the signal by the frequency after the frequency processing portion conversion process and the demodulation process portion frequency after to this conversion process, the satellite-signal operational part carries out the computing action, thereby can obtain the satellite time information.And, can proofread and correct self time information according to this satellite time information.
Like this, in the structure of the present invention, for example during the action of RF portion, other demodulation process portions (for example, BB (base band) portion) and satellite-signal operational part etc. are failure to actuate for receiving satellite signal and frequency processing portion that frequency is carried out conversion process.Then, when demodulation process portion moved, frequency processing portion and satellite-signal operational part were failure to actuate.And during the action of satellite-signal operational part, frequency processing portion and demodulation process portion are failure to actuate.
Thereby, can suppress the maximal value of consumed power and obtain time information from position information satellites such as gps satellites.
Preferably, above-mentioned time correction device is characterised in that, has the satellite-signal storage part of the above-mentioned satellite-signal that the above-mentioned acceptance division of storage receives.
According to said structure, the time correction device has the satellite-signal storage part of the satellite-signal that receives of storage acceptance division, therefore, the satellite-signal operational part can be not from the acceptance division of non-action status and obtain the satellite-signal that acceptance division receives from the satellite-signal storage part of operating state.
Preferably, above-mentioned time correction device is characterised in that, be the counter portion of satellite-signal computing clocking information the action correlation time that has the action that obtains above-mentioned acceptance division and be correlation time acceptance division clocking information and/or above-mentioned satellite-signal operational part, above-mentioned time information correction unit is according to the correction timing information that calculates based on above-mentioned acceptance division clocking information and/or above-mentioned satellite-signal computing clocking information, proofreaies and correct above-mentioned self time information.
According to said structure, the time information correction unit is according to the correction timing information that calculates based on acceptance division clocking information and/or satellite-signal computing clocking information, proofreaies and correct above-mentioned self time information.
Usually, in order to obtain the correction timing information, for example need time correction device receiving satellite signal and according to the satellite-signal that receives practically.
But among the present invention, during the action of satellite-signal operational part, acceptance division is receiving satellite signal not, therefore, can't directly obtain the correction timing information from received signal.
Thereby, among the present invention,, consider that this instrumentation time waits to determine to proofread and correct timing information by the time of counter portion instrumentation satellite-signal operational part action, therefore, can same precision come to carry out computing when continuing receiving satellite signal to proofreading and correct timing information with acceptance division.
Preferably, above-mentioned time correction device is characterised in that the time to go that comprises the satellite-signal of above-mentioned positional information satellite in the above-mentioned satellite-signal is a propagation delay time information.
According to said structure, the time to go that comprises the satellite-signal of positional information satellite in the satellite-signal is a propagation delay time information.
Thereby, can obtain consider this propagation delay time information proofread and correct timing information very accurately.
Preferably, above-mentioned time correction device is characterised in that, comprising the time that above-mentioned acceptance division receives the above-mentioned satellite-signal of above-mentioned positional information satellite in the above-mentioned acceptance division clocking information is the satellite-signal receiving time information, and above-mentioned satellite-signal receiving time information becomes the necessary minimal temporal information that is used to obtain above-mentioned satellite time information and above-mentioned correction timing information.
According to said structure, the satellite-signal receiving time information becomes the necessary minimal temporal information that is used to obtain the satellite time information and proofreaies and correct timing information, therefore, can pass through the action of the acceptance division of utmost point short time, efficiently satellite time information and correction timing information be carried out computing.
Preferably, above-mentioned time correction device is characterised in that, above-mentioned counter portion moves according to high precision oscillator.
According to said structure, counter portion moves according to high precision oscillator, therefore can obtain high-precision correction timing information etc.
Preferably, above-mentioned time correction device is characterised in that, comprise the subframe number information in the above-mentioned satellite-signal, described time correction device has subframe numbering obtaining section, this subframe numbering obtaining section obtains from above-mentioned subframe number information and comprises GPS all number information and/or UTC (universal time coordinate constantly, world concordant time) the target-subframe number information of parameter information, described time correction device receives the target-subframe of above-mentioned satellite-signal according to above-mentioned target-subframe number information.
According to said structure, the time correction device has subframe numbering obtaining section, its from the subframe number information obtain comprise GPS constantly all number information and/or the target-subframe number information of UTC parameter information, according to the target-subframe number information, the target-subframe of receiving satellite signal.
Thereby, even for example in the time can't obtaining GPS all number information constantly etc. by the reception of 1 satellite-signal, also can be according to the target-subframe number information, receive the subframe that stores GPS all number information constantly etc. reliably, as a result, can obtain GPS all number information constantly etc.
Preferably, above-mentioned time correction device is characterised in that, the satellite number information, Doppler frequency information and the C/A code phases information that comprise above-mentioned positional information satellite in the above-mentioned satellite-signal, described time correction device has the satellite information of seizure storage part, the satellite number information of the above-mentioned positional information satellite that this seizure satellite information storage portion stores receives, Doppler frequency information and C/A code phases information.
According to said structure, the time correction device has the seizure satellite information storage part of satellite number information, Doppler frequency information and the C/A code phases information of storing the positional information satellite that receives, therefore by adopting this satellite number information etc., make the seizure of following positional information satellite become easy.
Preferably, above-mentioned time correction device is characterised in that above-mentioned satellite-signal receiving time information is C/A code length or message 1 bit length.
According to said structure, the satellite-signal receiving time information is C/A code length or message 1 bit length.
Thereby, only by with extremely short time (1 millisecond (C/A code length), 20 milliseconds (message 1 bit length)) receiving satellite signal, promptly can provide the information of seizable positional information satellite in this moment etc.
Preferably, above-mentioned time correction device is characterised in that, described time correction device repeatedly receives above-mentioned satellite-signal from same above-mentioned positional information satellite, described time correction device has the matching judging part, and this matching judgement section judges is by the above-mentioned matching that repeatedly receives a plurality of above-mentioned satellite time information of obtaining.
According to said structure, the time correction device has the matching judging part from same above-mentioned positional information satellite receiving satellite signal repeatedly, and it is judged by repeatedly receiving the matching of a plurality of satellite time informations of obtaining.Thereby, can obtain more high-precision time information.
Preferably, above-mentioned time correction device is characterised in that, described time correction device receives above-mentioned satellite-signal from a plurality of above-mentioned positional information satellites, described time correction device has different satellite matching judging parts, the matching of a plurality of time informations that this difference satellite matching judgement section judges obtains from above-mentioned a plurality of above-mentioned positional information satellites.
According to said structure, the time correction device has different satellite matching judging parts from a plurality of positional information satellite receiving satellite signals, and it judges the matching of a plurality of time informations of obtaining from a plurality of positional information satellites.Thereby, can obtain more high-precision time information.
According to the present invention, above-mentioned problem realizes that by the time set of band time correction device this time set is characterised in that to have: acceptance division, and it receives from the next satellite-signal of positional information satellite transmission; The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least; Timing portion, it has self time information; And the time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information, and above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action.
According to the present invention, above-mentioned problem realizes that by the time adjustment method of time correction device this time correction device has: acceptance division, and it receives from the next satellite-signal of positional information satellite transmission; The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least; Timing portion, it has self time information; And time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information, it is characterized in that, above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action, above-mentioned satellite-signal according to above-mentioned acceptance division receives carries out computing by above-mentioned satellite-signal operational part then.
Description of drawings
Fig. 1 is the skeleton diagram of the wrist-watch of expression band GPS time correction device.
Fig. 2 is the skeleton diagram of the hardware configuration of expression band GPS wrist-watch etc.
Fig. 3 is the skeleton diagram of the software configuration of expression band GPS wrist-watch etc.
Fig. 4 is the skeleton diagram of the data in the various program storage parts of expression.
Fig. 5 is the skeleton diagram of the data in the various data store of expression.
Fig. 6 is the general flowchart of expression band GPS wrist-watch.
Fig. 7 is the general flowchart of expression band GPS wrist-watch.
Fig. 8 is the diagrammatic illustration figure of expression gps signal.
Fig. 9 is the diagrammatic illustration figure of gps signal and received signal.
Figure 10 is the skeleton diagram of hardware configuration etc. of the band GPS wrist-watch of expression the 2nd embodiment.
Figure 11 is the skeleton diagram of the interior data of the various program storage parts of expression the 2nd embodiment.
Figure 12 is the skeleton diagram of the interior data of the various data store of expression the 2nd embodiment.
Figure 13 is the general flowchart of the band GPS wrist-watch of expression the 2nd embodiment.
Figure 14 is the general flowchart of the band GPS wrist-watch of expression the 2nd embodiment.
Figure 15 is the gps signal of the 2nd embodiment and the diagrammatic illustration figure of received signal.
Figure 16 is the skeleton diagram of the interior data of the various program storage parts of expression the 3rd embodiment.
Figure 17 is the skeleton diagram of the interior data of the various data store of expression the 3rd embodiment.
Figure 18 is the general flowchart of the band GPS wrist-watch of expression the 3rd embodiment.
Figure 19 is the general flowchart of the band GPS wrist-watch of expression the 3rd embodiment.
Figure 20 is the skeleton diagram of the interior data of the various program storage parts of expression the 4th embodiment.
Figure 21 is the skeleton diagram of the interior data of the various data store of expression the 4th embodiment.
Figure 22 is the general flowchart of the band GPS wrist-watch of expression the 4th embodiment.
Figure 23 is the general flowchart of the band GPS wrist-watch of expression the 5th embodiment.
Figure 24 is the general flowchart of the band GPS wrist-watch of expression the 6th embodiment.
Figure 25 is the general flowchart of the band GPS wrist-watch of expression the 7th embodiment.
Embodiment
Below, with reference to detailed description preferred implementations of the present invention such as accompanying drawings.
In addition, the embodiment of the following stated is a preferred concrete example of the present invention, has therefore added technical preferred various qualifications.But as long as be not particularly limited the present invention's record in the following description, scope of the present invention just is not limited to these forms.
(the 1st embodiment)
Fig. 1 is expression as the skeleton diagram of the wrist-watch 10 of the band GPS time correction device of an example of the time set of band time correction device of the present invention (below be called " band GPS wrist-watch 10 ").Fig. 2 is the skeleton diagram of main hardware structure etc. of band GPS wrist-watch 10 inside of presentation graphs 1.
The pin 13 etc. that hornbook 12, minute hand, hour hand etc. are arranged in the surface configuration of band GPS wrist-watch 10 as shown in Figure 1.In addition, form the display of forming by LED etc. 27 on this surface, show various message.In addition, display 27 also can be LCD, simulation demonstration etc. except LED.
In addition, as shown in Figure 1, band GPS wrist-watch 10 has antenna 11.This antenna 11 receives from empty with the signal (satellite-signal) of regulation orbit ring around the gps satellite 15 of rotation on earth.In addition, gps satellite 15 is the examples around geocyclic positional information satellite.
In addition, as shown in Figure 2, the inside of band GPS wrist-watch 10 has clockwork and GPS mechanism, also brings into play the function as computing machine.
That is, the clockwork in the present embodiment is so-called electronic clock.
Below, each structure shown in Figure 2 is described.
As shown in Figure 2, band GPS wrist-watch 10 has bus 16.Be connected with MPU (Micro Processing Unit) 17, general RAM (RandomAccess Memory) 18, ROM (Read Only Memory) 19 etc. on the bus 16.
In addition, also be connected with the GPS mechanism of receiving satellite signal on the bus 16.
That is, antenna 11, make the signal that receives become intermediate frequency (I/F) etc. RF portion 20, the signal of obtaining from RF portion 20 carried out base band (BB) portion 21 of demodulation process and storage be connected with bus 16 with RAM22 etc. by the BB of the signal after BB portion 21 demodulation process.
The signal that receives from gps satellite 15 grades of Fig. 1, from antenna 11 via RF portion 20 to 21 outputs of BB portion.Then, take out as gps signal, store BB RAM22 into from BB portion 21.
Like this, RF portion 20 and BB portion 21 etc. become an example of the acceptance division that receives gps signal.BB becomes an example of satellite-signal storage part with RAM22.
In addition, BB carries out computing with the gps signal of storing among the RAM22 by MPU17, as for example GPS time information (Z counting) taking-up of message data of gps satellite described later.The details of the signal that receives from gps satellite 15 will be narrated in the back.
Like this, MPU17 etc. becomes and obtains the example that Z counting waits the satellite-signal operational part of satellite time information.
In addition, also be connected with clockwork on the bus 16.This clockwork comprises the real-time clock of being made up of IC (SIC (semiconductor integrated circuit)) etc. (RTC) 23, quartzy (Xtal) oscillatory circuit 25 etc.In addition, except quartzy oscillatory circuit 25, for example also be connected with quartzy oscillatory circuit (TCXO) 24 high precision oscillators such as grade on the bus 16 with temperature-compensation circuit.
Like this, in the present embodiment, be connected with 2 kinds of oscillatory circuits.This is because can separately use big but the TCXO24 that precision is high of power consumption and power consumption is little but common quartzy oscillatory circuit 25 that precision is low according to its purposes.Its details will be narrated in the back.
In addition, also be connected with on the bus 16 power control circuit 26 that is used to control the power supply unit of forming by battery etc., display 27 shown in Figure 1, as timer 29 of an example of counter portion etc.
This timer 29 is counted the time according to TCXO24, thus but the high precision instrumentation time.
Like this, bus 16 has the function that connects whole devices, is the internal bus with address and data routing.General RAM18 etc. except the processing of the program that puts rules into practice, the ROM19 that is connected with bus 16 of control etc. also.ROM19 stores various programs and various information etc.
In addition, RTC23 becomes an example of the timing portion with self time information.RF portion 20 grades become an example of the acceptance division of the gps signal that reception sends from positional information satellite (gps satellite 15).
Fig. 3 is the skeleton diagram of the main software structure of expression band GPS wrist-watch 10 etc.
As shown in Figure 3, band GPS wrist-watch 10 has control part 28.Various programs in the various program storage parts 30 of these control part 28 processing and the various data in the various data store 40.
In addition, Fig. 3 separately represents various program storage parts 30 and various data store 40.But, in fact be not such separate storage data, but for convenience of explanation and separately record.
Fig. 4 is the skeleton diagram of the data in the various program storage parts 30 of presentation graphs 3.Fig. 5 is the skeleton diagram of the data in the various data store 40 of presentation graphs 3.
Fig. 6 and Fig. 7 are the general flowcharts of main action etc. of the band GPS wrist-watch 10 of expression present embodiment.
Below, according to action of the band GPS wrist-watch 10 of the flowchart text present embodiment of Fig. 6 and Fig. 7 etc.Simultaneously various programs and the various data of key diagram 4 and Fig. 5 in the lump.
In the present embodiment, for example automatically carrying out with band GPS wrist-watch 10, the situation of the time correction of 1 time on the 1st (24 hours 1 time) is that example describes.
When band GPS wrist-watch 10 carried out the time correction of RTC23 of Fig. 2, at first, shown in the ST1 of Fig. 6, the RF portion 20 of Fig. 2, BB portion 21 and BB moved with RAM22, the search of the satellite-signal of beginning gps satellite 15.At this moment, the MPU17 of Fig. 2 does not carry out the computing of gps signal etc.
In the past, MPU17 and RF portion 20, BB portion 21 and BB moved simultaneously with RAM22.This be because, carry out calculation process continuously via the gps signal that antenna 11 receives to RF portion 20 grades, obtain Z counting etc. from gps signal.
But in the present embodiment, during the search such as 20 grades of RF portion, seizure and receiving the satellite-signal of gps satellite 15, MPU17 does not carry out computing etc.Thereby, in the present embodiment, can avoid RF portion 20 grades and MPU17 to move simultaneously and increase the maximal value (peak value) of power consumption.
Specifically, the action of ST1 is performed by Fig. 4 " RF portion, BB portion and BB RAM operation program " 31 actions.Promptly, " RF portion, BB portion and BB RAM operation program " 31, with reference to the data of " RF portion, BB portion and the BB portion with RAM action beginning data (24 hours 1 are inferior) " 41 of Fig. 5, when reaching the time of automatically carrying out time correction, the satellite-signal of search gps satellite.
In addition, in search of satellite signals, adopt the timer 29 of TCXO24 to begin action, instrumentation elapsed time accurately.Specifically, 32 actions of the timer control program of Fig. 4, when storing the moment of beginning search of satellite signals the search data zero hour 42 of Fig. 5 into, timer 29 continues the instrumentation times.These search data zero hour 42 for example are " 0 " seconds.
Then, enter ST2.In ST2, judge whether to capture the satellite-signal of gps satellite 15.Judging when capturing satellite-signal, enter ST3.On the other hand, when not capturing satellite-signal, standby is till capture.
In ST3, begin receiving satellite signal by RF portion 20 grades.In addition, store the reception zero hour of this gps signal simultaneously.
Specifically, the reception of Fig. 4 begins determining program 33 actions, judges whether RF portion 20 grades have begun receiving satellite signal.Judging when beginning to receive, the instrumentation of timer 29 that will be corresponding with the moment that begins to receive stores the reception data zero hour 43 of Fig. 5 constantly into.
That is, these reception data zero hour 43 are and the i.e. difference of " 0 " of search data 42 zero hour, for example, when search needs 1 second, become " 1 " second.
Then, in ST4 to ST7, carry out the operation that receives the satellite-signal (gps signal) of gps satellite 15 by band GPS wrist-watch 10.
In ST4, the gps signal that the antenna 11 of Fig. 2 receives from gps satellite 15.Then, the gps signal that receives is imported into RF portion 20.In the RF portion 20, with the gps signal of input as intermediate frequency (IF), analog signal conversion become digital signal etc. after, with this digital signal to 21 outputs of BB (base band) portion.
Then, enter ST5, in ST5, the carrier for digital signal of input is removed by BB portion 21, carries out the processing such as relevant, phase-locking of C/A code.Like this, the gps signal to gps satellite 15 carries out demodulation in BB portion 21.
Then, in ST6, be stored in BB RAM22 by the gps signal after 21 demodulation of BB portion.Specifically, the BB signal data 44 as Fig. 5 is stored in BB RAM22.
Like this, because the gps signal that receives after the also demodulation is stored in BB RAM22, therefore as described later,, can not hinder actions such as computing subsequently even stop the action of RF portion 20 and BB portion 21 yet.
Then, in ST7, judge whether the reception of the gps signal of gps satellite 15 is passed through the stipulated time, for example about 1 subframe (6 seconds to the 6 seconds+α, for example 6.6 seconds).
In the present embodiment, purpose is to obtain GPS time information (Z counting) from the gps signal of gps satellite 15, therefore, the gps signal that sends from gps satellite 15 is described below.
Fig. 8 is the diagrammatic illustration figure of expression gps signal.
Shown in Fig. 8 (a), unit sends signal from gps satellite 15 with 1 frame (30 seconds).This 1 frame has 5 subframes (1 subframe is 6 seconds).Each subframe has 10 words (word) (1 word is 0.6 second).
In addition, the word of the front end of each subframe becomes the TLM word that stores TLM (Telemetry word) data.Shown in Fig. 8 (b), in this TLM word, its front-end stores has the preamble data.
In addition, the follow-up word of TLM is the HOW word that stores HOW (hand over word) data.The GPS time information (Z counting) that the gps satellite that is called TOW (Time of week) is arranged in the front-end stores of HOW word.
The TLM that this Z counting stores follow-up subframe begins the moment of part.GPS begins elapsed time with second showing at 0 o'clock from Sun. weekly constantly, returns 0 at 0 o'clock of Sun. in next week.
Like this, be the HOW word with reference to the 2nd word of subframe, can obtain the GPS time information is the Z counting.But, when band GPS wrist-watch 10 receives from the gps signal that gps satellite 15 sends, can't determine partly to begin to receive from which of subframe.Thereby, consider to begin situation about receiving afterwards immediately from the TOW (Z counting) of Fig. 8 (b), in the present embodiment, time of reception with 1 subframe promptly 6 seconds as substantially.
In addition, consider the situation about midway beginning of the reception of gps signal from the TOW (Z counting) of Fig. 8 (b), preferably making time of reception is 1 subframe+α, for example 6.6 seconds etc.
Like this, band GPS wrist-watch 10 receives gps signals up to through the time of reception about 1 subframe, thereby, must obtain the data of the TOW (Z counting) of Fig. 8.
Then, the Z counting that receives is stored in BB RAM22 in ST6.
In ST7, the reception of Fig. 4 finish could determining program 34 with reference to the time of reception data (for example, 6 seconds or 6.6 seconds) 45 of Fig. 5, judge whether through the time of reception about 1 subframe.
That is, be an example of 1 time of reception about subframe, as for example 6 seconds or 6.6 seconds of the time of reception data.
Judged according to the timer 29 of Fig. 2 in these 6.6 seconds.That is, in the ST3 of Fig. 6,9 pairs of timer 2s receive and carry out timing the zero hour, store these data, for example 10 seconds.
Because timer 29 continues timing subsequently, therefore, the timing that becomes 16.6 seconds in the chronometric data of timer 29 finishes to receive.Specifically, judge by the reception end determining program 35 of Fig. 4.
This reception finishes determining program 35 to be judged when receiving end, and " RF portion, BB portion and BB RAM operation program " 31 actions shown in ST8, stop the action of RF portion and BB portion.On the other hand, when receive finishing determining program 35 and judging reception and do not finish, return step ST4, proceed the reception of gps signal.
Then, enter ST9.In ST1 to ST8, the computing that is used for obtaining from the gps signal that RF portion 20 grades receive Z counting etc. is not carried out.This computing is undertaken by MPU17 etc. after the ST9.
Like this, in the present embodiment, RF portion 20 grades receive during the gps signal of gps satellite 15, via power control circuit 26 grades of Fig. 2 to supply powers such as RF portion 20, BB portions 21.But,, can not supply with the power that is used for the computing gps signal to MPU17 during this period.
On the other hand, when MPU17 begins the computing action of gps signal after ST9, supply with this power to MPU17.But during this period, because RF portion 20 grades stop the reception of gps signal, so the power consumption of RF portion 20 etc. stops or significantly reducing.
Thereby the computing action of action such as the reception of the gps signal of RF portion 20 grades and MPU17 etc. can not carried out simultaneously, so the rising of maximum power value (peak power value) that can inhibition zone GPS wrist-watch 10.
Then, illustrate that with ST8 to ST12 the BB signal data 44 to Fig. 5 carries out computing, obtain the Z counting, according to the operation of this Z counting with the time correction of GPS wrist-watch 10.
At first, in ST8, when the action of RF portion and BB portion stopped, the BB signal data of by execution such as MPU17 the BB of Fig. 2 being stored in RAM22 in this timing 44 carried out the action (ST9) of computing.Specifically, signal operation operation program 36 actions of Fig. 4.
Then, enter ST10.In ST10, when the computing of signal operation operation program 36 finished, operation result was stored in the signal operation result data 46 of Fig. 5.The moment of the timer 29 when meanwhile, signal operation finishes registers as the signal operation data finish time 47 of Fig. 5.
For example, if spent 3 seconds operation time, then the chronometric data of timer 29 becomes 19.6 seconds.
Such operation result gps signal of Fig. 9 and the diagrammatic illustration figure explanation of received signal.
In Fig. 9, epimere represents that the gps signal that sends from gps satellite 15, hypomere represent to receive the received signal that unions go out by band GPS wrist-watch 10.
At first, as shown in Figure 9, gps signal and received signal are received with being separated by transmission time β.That is, transmission time β represents that gps signal arrives time till the band GPS wrist-watches 10 from gps satellite 15.Here, transmission time β becomes an example of propagation delay time information.
Grasp the phase place of C/A code and, be with GPS wrist-watch 10 can obtain this transmission time β by ST5 in the ST9 computing at Fig. 6.
In addition, the beginning part of each subframe of arrow a1 to the a4 presentation graphs 8 (a) of the gps signal of Fig. 9.By getting with the relevant of the C/A code of gps signal and carrying out computing subsequently, band GPS wrist-watch 10 also can be obtained the timing data that this begins part.
On the other hand, the arrow b1 to b4 of the received signal of hypomere represents the beginning part of the subframe corresponding with the a1 to a4 of gps signal.Arrow b1 to b4 shows with postponing transmission time β respectively and is received.
And the Z counting Z1 to Z4 of Fig. 9 is the TOW of Fig. 8 (b), and this is the zero hour of next subframe of data representation constantly.For example, the Z1 of Fig. 9 represents (00:00:00 second), therefore, and the moment of the beginning part of the subframe that this moment (00:00:00 second) expression is represented by the a2 of Fig. 9.
As mentioned above, subframe integral body has 6 seconds length, and therefore, the Z of a2 to a4 counting is to separate 6 seconds the moment respectively.
Band GPS wrist-watch 10 can be obtained the moment of the Z counting of this subframe by computing.
Promptly, be with GPS wrist-watch 10 to carry out computing by the gps signal that receives from gps satellite 15, as shown in Figure 9, can obtain the moment data (Z counting) of beginning part of next subframe of (receiver side are b2 etc.) such as beginning timing data a2 of transmission time β, subframe, the subframe that receives.
Under this prerequisite, after as the process flow diagram of Fig. 6, receiving, become following result.
That is, search in the part of beginning, make the search of the satellite-signal of band GPS wrist-watch 10 beginning gps satellites 15 in the expression of Fig. 9.Conform to the ST1 of Fig. 6.
At this moment, though timer 29 picks up counting, it is " 0 " second that search begins.This time is stored in the search data zero hour 42 of Fig. 5.
Then, catch gps satellite 15, begin to receive gps signal at ST3 at ST2.As mentioned above, if this search for example is 1 second, then the reception start time of Fig. 9 is " 1 second " (reception data zero hour 43 of Fig. 5) in timer 29.
In addition, the reception of the gps signal of ST8 finish (action of RF portion 20 grades stops) be from reception begin for example after 6.6 seconds, so on timer 29, become " 7.6 seconds ".
In addition, as mentioned above, if the computing of ST9 action for example is 3 seconds, the moment when then computing finishes on the timer 29 becomes " 10.6 seconds " (signal operation data finish time 47).
And as mentioned above, band GPS wrist-watch 10 can be obtained the timing data of the beginning part of the subframe that receives by computing etc. in Fig. 9, therefore, can obtain this by computing and regularly be equivalent to pass through what seconds from the reception of the timer 29 of Fig. 9 zero hour.
If should for example be made as the time 2 seconds, then in the received signal of Fig. 9, the moment of the beginning of the subframe that arrow b2 represents part on timer 29 becomes " 3 seconds ".
That is, as shown in Figure 9, the moment of the Z counting of obtaining from received signal (Z2) is equivalent to arrow b3, promptly becomes moment of " 9 seconds " at timer 29.
And " 9 seconds " on this timer 29 comprise transmission time β, therefore, and from deducting the moment that moment on the timer 29 behind the transmission time β is equivalent to Z counting (Z2) in 9 seconds.
Like this, in the moment add " 6 seconds " in the moment data of this Z counting (Z2) after, the moment (15 seconds) that becomes the arrow b4 from the timer 29 deducts the moment (a4 that is equivalent to Fig. 9) behind the transmission time β.
Thereby, in ST11, time correction data operation program 37 actions of Fig. 4, data that obtain according to the above-mentioned gps signal of computing and by the data of timer 29 timing, finish the back by calculating in computing, obtain the beginning part (a4) of subframe of the gps signal of arrival, store with data 48 as the time correction of Fig. 5.
These data are the timing of " the 15 seconds-transmission time β " in timer 29 for example, with the moment " 00:00:06 "+" 6 seconds " of Z counting (Z2) promptly " 00:00:12 " carry out time correction.
Like this, by add in the Z counting that receives at band GPS wrist-watch 10 computing finish till the number of sub frames of the process value after multiply by 6 seconds, deduct transmission time β again, can obtain the timing of time correction accurately.
Then, shown in the ST12 of Fig. 7,38 actions of the time emendation program of Fig. 4, the RTC23 with 48 couples of Fig. 2 of data proofreaies and correct according to the time correction of Fig. 5.Thereby, can carry out time correction accurately.
In addition, when this time correction finishes, the release of the timer 29 of Fig. 2, then, only common quartzy oscillatory circuit 25 perseverations.
Like this, when requiring precision constantly, use the TCXO24 of Fig. 2, use common quartzy oscillatory circuit 25 in other cases, thereby, can shorten service time of the TCXO24 that consumes more power, but the power consumption of inhibition zone GPS wrist-watch 10 integral body.
As mentioned above, in the present embodiment,, therefore can reduce peak power owing to separately carry out the reception and the computing of the gps signal of gps satellite 15.Meanwhile, even spended time carries out computing stopping to receive afterwards, also can carry out time correction accurately.In addition, in the present embodiment, timer 29 adopts high-precision TCXO24, therefore can further improve precision constantly.This TCXO24 only uses in the case of necessary, uses common quartzy oscillatory circuit 25 under unnecessary situation.Thereby, also can reduce consumed power.
In addition, in the present embodiment, adopt timer 29, used the search data zero hour 42, the reception data zero hour 43, the signal operation data finish time 47.But be not limited thereto, also can constitute only any one data of the instrumentation search data zero hour 42, the reception data zero hour 43, the signal operation data finish time 47, obtain other data by computing.
In addition, as shown in Figure 9, the present invention can carry out the time correction of RTC23 irrespectively, accurately with the time length till finishing to computing.Thereby also it doesn't matter even reduce the ability of MPU17 of computing of the ST9 carry out Fig. 6.Under this situation, can reduce the consumed power of MPU, constitute power consumption band GPS wrist-watch still less.
The time emendation program 38 of Fig. 4 becomes an example of time information correction unit.The antenna 11 of Fig. 2, RF portion 20 and BB portion 21 become an example of acceptance division.The signal operation operation program 36 of the MPU17 of Fig. 2 and Fig. 4 etc. becomes an example of satellite-signal operational part.This acceptance division and satellite-signal operational part are selected ground action.
The time of reception data 45 of Fig. 5 become an example of acceptance division clocking information and satellite-signal receiving time information.As 6 seconds or 6.6 seconds of the example of time of reception data 45, become an example that is used to obtain the satellite time information and proofreaies and correct the necessary minimal temporal information of timing information.
In addition, the signal operation data finish time 47 of Fig. 5 become an example of satellite-signal computing clocking information.The timer 29 of Fig. 2 becomes an example of counter portion.The time correction of Fig. 5 becomes an example of proofreading and correct timing information with data 48.
(the 2nd embodiment)
The structures of the structure of the band GPS wrist-watch 100 of present embodiment etc. and the band GPS wrist-watch 10 of above-mentioned the 1st embodiment etc. are most of identical.Thereby identical structure adopts also omission explanations such as prosign, below, be that the center describes with the difference.
Figure 10 is the skeleton diagram of main hardware structure etc. of wrist-watch 100 inside of expression the 2nd embodiment.Signal shown in Figure 10 is stored respectively by the signal after 20 processing of RF portion with by the signal after BB portion 21 demodulation process with RAM22a.
The signal that receives from gps satellite 15 grades of Fig. 1 after being handled by RF portion 20 via antenna 11, stores signal RAM22a into.Then, the BB portion 21 that obtains the signal of this storage carries out demodulation process, and this signal also is stored in signal RAM22a.
Here, RF portion 20 becomes an example of frequency processing portion.BB portion 21 grades become an example of demodulation process portion.Signal becomes an example of satellite-signal storage part with RAM22a.
In addition, signal carries out computing with the gps signal of storing among the RAM22a by MPU17, as message data, for example GPS time information (Z counting) taking-up of gps satellite.
Figure 11 is the skeleton diagram of the data in the various program storage parts 30 of expression the 2nd embodiment.Figure 12 is the skeleton diagram of the data in the various data store 40 of expression the 2nd embodiment.
Figure 13 and Figure 14 are the general flowcharts of main action etc. of the band GPS wrist-watch 100 of expression the 2nd embodiment.
Below, according to action of the band GPS wrist-watch 100 of the flowchart text present embodiment of Figure 13 and Figure 14 etc.Various programs and the various data of Figure 11 and Figure 12 are described simultaneously in the lump.
In the present embodiment, for example automatically carrying out with band GPS wrist-watch 100, the situation of 1 time on the 1st (24 hours 1 time) time correction is that example describes.
When band GPS wrist-watch 100 carried out the time correction of RTC23 of Figure 10, at first, shown in the ST1a of Figure 13, RF portion 20 and the signal of Figure 10 moved with RAM22a, begin to receive the gps signal of gps satellite 15.At this moment, the BB portion 21 of Figure 10 is failure to actuate, and MPU17 does not carry out the computing of gps signal.
In the past, MPU17 also moved with RAM22a simultaneously with RF portion 20, BB portion 21 and signal.This be because, carry out calculation process continuously via the gps signal that antenna 11 receives to RF portion 20 grades, obtain Z counting etc. from gps signal.
But in the present embodiment, RF portion 20 receives during the gps signal of gps satellite 15, and BB portion 21 and MPU17 do not carry out computing etc.During 21 actions of BB portion, RF portion 20 and MPU17 do not carry out computing etc.And between the MPU17 operational stage, RF portion 20 and BB portion 21 are failure to actuate.That is, the computing of RF portion 20, BB portion 21 or MPU17 is carried out selectively.Thereby, in the present embodiment, can avoid moving the maximal value (peak value) that increases power consumption simultaneously because of them.
Specifically, the action of ST1a is performed by Figure 11 " RF portion and signal RAM operation program " 31a action.That is, " RF portion and signal RAM operation program " 31a when reaching the time of automatically carrying out time correction, receives the gps signal of gps satellite with reference to the data of " RF portion and signal begin data (24 hours 1 inferior) with the RAM action " 41 of Figure 12.
In addition, when receiving gps signal, adopt TCXO24, timer 29 begins action, instrumentation elapsed time accurately.Specifically, 32 actions of the timer control program of Figure 11 store the moment that begins to receive gps signal the reception data zero hour 43a of Figure 12 into, and timer 29 continue the instrumentation times.These reception data zero hour 43a for example becomes " 0 " second.
Then, the band GPS wrist-watch 100 of present embodiment is carried out the operation of the gps signal that receives gps satellite 15.
In ST2a, the gps signal that the antenna 11 of Figure 10 receives from gps satellite 15.Then, the gps signal that receives is imported into RF portion 20.In the RF portion 20, with the gps signal of input as intermediate frequency (IF), analog signal conversion become digital signal after, store this digital signal into signal RAM22a.Specifically, store with data 49 as the RF signal of Figure 12.
Then, enter ST3a, in ST3a, judge whether the reception of the gps signal of gps satellite 15 is passed through the stipulated time, for example about 1 subframe (6 seconds to the 6 seconds+α, for example 6.6 seconds).
Like this, band GPS wrist-watch 100 receives gps signals till through the time of reception about 1 subframe, thereby must obtain the data of the TOW (Z counting) of Fig. 8.
Then, the Z counting that receives is stored in signal RAM22a as described later.
In ST3a, the reception of Figure 11 finish could determining program 34 with reference to the time of reception data (for example, 6 seconds or 6.6 seconds) 45 of Figure 12, judge whether through the time of reception about 1 subframe.That is, as the example that for example became 1 time of reception about subframe in 6 seconds or 6.6 seconds of time of reception data.
Judged according to the timer 29 of Figure 10 in these 6.6 seconds.That is, reach 6.6 seconds timing end reception in the chronometric data of timer 29.Specifically, judge by the reception end determining program 35 of Figure 11.
This reception finishes determining program 35 to be judged when receiving end, and " RF portion and signal RAM operation program " 31a of Figure 11 action shown in ST4a, stops the action of RF portion 20.On the other hand, when receive finishing determining program 35 and judging reception and do not finish, return step ST2a and continue to receive.
Then, enter ST5a.In ST5a, the action of BB portion 21 begins.Specifically, BB portion operation program 39 actions of Figure 11.
Specifically, shown in ST6a, BB portion 21 obtain signal with the RF signal of the Figure 12 that writes down among the RAM22a with data 49, remove this carrier for digital signal, carry out the processing such as relevant, phase-locking of C/A code.Like this, in the BB portion 21, the gps signal of gps satellite 15 is carried out demodulation.
Like this, because BB portion 21 utilizes signal with the RF signal of storing among RAM22a data 49,, also can not hinder the computing of BB portion 21 even therefore stop the action of RF portion 20 at ST4a.
Then, in ST7a, be stored in signal RAM22a by the gps signal after 21 demodulation of BB portion.Specifically, as shown in figure 12, be stored in signal RAM22a as BB signal data 44.
Then, in ST8a, the action of BB portion 21 stops.Specifically, 39 actions of BB portion operation program stop the action of BB portion.
Gps signal after reception and the demodulation is stored in RAM22a, therefore, even stop the action of BB portion 21, also can not hinder actions such as computing subsequently.
Then, enter ST9a.In ST1a to ST8a, the computing that is used for obtaining from the gps signal that RF portion 20 grades receive Z counting etc. is not carried out.This computing is undertaken by MPU17 etc. after the ST9a.
Like this, in the present embodiment, RF portion 20 receives during the gps signal of gps satellites 15, to the power that RF portion 20 supplies with the action usefulness, still, can not supply with the power of action usefulness to BB portion 21 and MPU17 etc. via power control circuit 26 grades of Figure 10.In addition, during BB portion 21 supplies with the power of action usefulness, do not supply with the power of action usefulness to RF portion 20 and MPU17 etc.And as ST9a, MPU17 supplies with this power to MPU17 after beginning the computing action of gps signal.But during this period, the power consumption of RF portion 20 and BB portion 21 stops or significantly reducing.
In other words, RF portion 20, BB portion 21, MPU17 etc. are action simultaneously not, and they must be that any one moves selectively.
Thereby, the rising of maximum power value (peak power value) that can inhibition zone GPS wrist-watch 100.
Then, illustrate that with ST9a to ST12a the BB signal data 44 to Figure 12 carries out computing, obtain the Z counting, according to the operation of this Z counting with the time correction of GPS wrist-watch 100.
At first, in ST8a, when the action of BB portion 21 stopped, the BB signal data of by execution such as MPU17 the signal of Figure 10 being stored in RAM22a in this timing 44 carried out the action (ST9a) of computing.Specifically, signal operation operation program 36 actions of Figure 11.
Then, enter ST10a.In ST10a, when the computing of signal operation operation program 36 finished, operation result was stored in the signal operation result data 46 of Figure 12.The moment of the timer 29 when meanwhile, signal operation finishes registers as the signal operation data finish time 47 of Figure 12.
For example, receive from the gps signal before the computing shown in the ST4a and to finish for example to spend 0.4 second till the release of the BB portion 21 of ST8a, spend 3 seconds the operation time of ST9a and ST10a, and then the chronometric data of timer 29 becomes 10 seconds.
The gps signal of the 2nd embodiment of use Figure 15 and the diagrammatic illustration figure of received signal illustrate such operation result.
Among Figure 15, epimere represents that the gps signal that sends from gps satellite 15, hypomere represent to receive the received signal that unions go out by band GPS wrist-watch 100.
At first, as shown in figure 15, gps signal and received signal are received with separating transmission time β.That is, transmission time β represents that gps signal arrives the time of band GPS wrist-watch 100 from gps satellite 15.Here, transmission time β becomes an example of propagation delay time information.
By in the ST3a of Figure 13, grasping the phase place of C/A code, carry out the computing of ST7a, band GPS wrist-watch 100 can be obtained this transmission time β.
In addition, the beginning part of each subframe of arrow a1 to the a4 presentation graphs 8 (a) of the gps signal of Figure 15, still, by getting with the relevant of the C/A code of gps signal and carrying out computing subsequently, band GPS wrist-watch 100 also can be obtained the timing data that this begins part.
On the other hand, the arrow b1 to b4 of the received signal of hypomere represents the beginning part of the subframe corresponding with the a1 to a4 of gps signal.Arrow b1 to b4 shows with postponing transmission time β respectively and is received.
And the Z counting Z1 to Z4 of Figure 15 is the TOW of Fig. 8 (b), and this is the zero hour of next subframe of data representation constantly.For example, the Z1 of Figure 15 represents (00:00:00 second), therefore, and the moment of the beginning part of the subframe that this moment (00:00:00 second) expression is represented by the a2 of Figure 15.
As mentioned above, subframe integral body is 6 seconds length, and therefore, the Z of a2 to a4 counting is to separate 6 seconds the moment respectively.
Band GPS wrist-watch 100 can be obtained the moment of the Z counting of this subframe by computing.
Promptly, be with GPS wrist-watch 100 to carry out computing by the gps signal that receives from gps satellite 15, as shown in figure 15, can obtain the moment data (Z counting) of beginning part of next subframe of (receiver side are b2 etc.) such as beginning timing data a2 of transmission time β, subframe, the subframe that receives.
Under this prerequisite, after as the process flow diagram of Figure 13, receiving, become following result.
That is, receive the part of beginning, make band GPS wrist-watch 100 begin to receive the gps signal of gps satellite 15 in the expression of Figure 15.Conform to the ST1a of Figure 13.
This moment, timer 29 picked up counting, and to begin be " 0 " second but receive.This time is stored in the reception data zero hour 43a of Figure 12.
In addition, to finish (action of RF portion 20 stops) be after for example beginning 6.6 seconds from reception, therefore, to become " 6.6 seconds " on timer 29 in the reception of the gps signal of ST4a.
In addition, if making the action of the BB portion 21 of ST5a to ST8a subsequently is 0.4 second, ST9a subsequently and the computing of ST10a action for example are 3 seconds as mentioned above, and the moment when then computing finishes on the timer 29 becomes " 10 seconds " (signal operation data finish time 47).
And, as mentioned above, band GPS wrist-watch 100 can be obtained the timing data of the beginning part of the subframe that receives by computing etc. in Figure 15, therefore, can obtain this by computing and regularly be equivalent to pass through what seconds from the reception of the timer 29 of Figure 15 zero hour.
If should for example be made as the time 3 seconds, then in the received signal of Figure 15, the moment of the beginning of the subframe that arrow b2 represents part on timer 29 becomes " 3 seconds ".
That is, as shown in figure 15, the moment of the Z counting of obtaining from received signal (Z2) is equivalent to arrow b3, promptly becomes moment of " 9 seconds " at timer 29.
And " 9 seconds " on this timer 29 comprise transmission time β, therefore, and from deducting the moment that moment on the timer 29 behind the transmission time β is equivalent to Z counting (Z2) in 9 seconds.
Like this, in the moment add " 6 seconds " in the moment data of this Z counting (Z2) after, the moment (15 seconds) that becomes the arrow b4 from timer 29 deducts the moment (a4 that is equivalent to Figure 15) behind the transmission time β.
Thereby, in ST11a, time correction data operation program 37 actions of Figure 11, data that obtain according to the above-mentioned gps signal of computing and by the data of timer 29 timing, finish the back by calculating in computing, obtain the beginning part (a4) of subframe of the gps signal of arrival, store with data 48 as the time correction of Figure 12.
These data are the timing of " the 15 seconds-transmission time β " in timer 29 for example, with the moment " 00:00:06 "+" 6 seconds " of Z counting (Z2), promptly " 00:00:12 " carry out time correction.
Like this, by add in the Z counting that receives at band GPS wrist-watch 100 computing finish till the number of sub frames of the process value after multiply by 6 seconds, deduct transmission time β again, can obtain the timing of time correction accurately.
Then, shown in the ST12a of Figure 14,38 actions of the time emendation program of Figure 11, the RTC23 with 48 couples of Figure 10 of data proofreaies and correct according to the time correction of Figure 12.Thereby, can carry out time correction accurately.
As mentioned above, in the present embodiment since separately carry out the gps signal of gps satellite 15 reception, separate the mediation computing, thereby, can reduce peak power, and, even spended time carries out computing after stopping reception and demodulation, also can carry out time correction accurately.
In addition, in the present embodiment, adopt timer 29, used reception data zero hour 43a, the signal operation data finish time 47.But be not limited thereto, also only instrumentation receives any one data of the data 43a zero hour, the signal operation data finish time 47, obtains other data by computing.
In addition, as shown in figure 15, the present invention can irrespectively carry out the time correction of RTC23 accurately with the time length till finishing to computing.Thereby also it doesn't matter even reduce the ability of MPU17 of computing of the ST9a carry out Figure 14 etc.
Under this situation, can reduce the consumed power of MPU, constitute power consumption band GPS wrist-watch still less.
(the 3rd embodiment)
Figure 16 and Figure 17 are the schematic block diagram of primary structure of the band GPS wrist-watch 200 (with reference to Fig. 1) of expression the present invention the 3rd embodiment.Figure 18 and Figure 19 are the general flowcharts of the band GPS wrist-watch 200 of present embodiment.
The structures of the band GPS wrist-watch 10 of the structure of the band GPS wrist-watch 200 of present embodiment etc. and above-mentioned the 1st embodiment and the band GPS wrist-watch 100 of the 2nd embodiment etc. are most of identical.Thereby identical structure adopts prosign and omits explanation, below, be that the center describes with the difference.In addition, though these Figure 16, Figure 17, Figure 18, Figure 19 based on the band GPS wrist-watch 10 of the 1st embodiment, also can be applicable to the band GPS wrist-watch 100 of the 2nd embodiment.
In the present embodiment, be different from the 1st embodiment and the 2nd embodiment, band GPS wrist-watch 200 is obtained " week numbering data " and " UTC supplemental characteristic " from the gps signal of gps satellite 15.
As mentioned above, the data of " the Z counting " obtained from gps signal, from elapsed time that began in 0 o'clock on Sun. weekly with second showing, returned 0 at 0 o'clock of Sun. in next week.
Thereby, need the time information of definite Zhou Danwei of surpassing, when promptly counting the date in the moment of representing, need Z counting information in addition by this Z.
Here it is, and week is numbered data.Week numbers data and is enclosed for example with the serial number that is numbered " 0 " week since on January 6th, 1980.This, numbering packet was contained in the subframe 1 in the subframe shown in Fig. 8 (a) in week.In addition, the subframe of the TLM (A) shown in subframe 1,2,3, the 4 difference presentation graphs 8 (a), (B), (C), (D).
Thereby when band GPS wrist-watch 200 carried out the time correction of RTC23 of Fig. 2 in the data that comprise the date, " the Z counting " obtained in the 1st embodiment and the 2nd embodiment, also needing to obtain should " all data of numbering ".
In addition, the atomic clock of the date of week numbering expression and USNO-US Naval Observatory (USNO) management is synchronous.Thereby, produce deviation slightly with UTC (world concordant time).This correction for drift value becomes the UTC supplemental characteristic, and these data are stored in the page or leaf 18 of subframe 4.
Thereby the band GPS wrist-watch of present embodiment need be obtained this UTC supplemental characteristic (UTC offset data) and proofread and correct in order correctly to grasp the date and the moment.
In addition, UTC is world concordant time, therefore, sets 9 hours ahead in order to be corrected into Japan time, thereby can obtain Japan standard time.
Like this, present embodiment be when time correction, obtain the date and with the example of the corrected value of UTC.Thereby, use Figure 18 to specifically describe to obtain be used to grasp the date week numbering the operation of data, then, use Figure 19 to specifically describe to be used to the operation that obtains with the corrected value of UTC.
As shown in figure 18, in the present embodiment,, at this moment, obtain the numbering (ID) (ST9 etc.) of subframe from the gps signal that receives though similarly the gps signal of gps satellite 15 is carried out computing with the 1st embodiment.
Then, in ST22, judge whether the subframe numbering (ID) that receives is " 1 ".Specifically, subframe ID determining program 131 actions of Figure 16 are judged.By this judgement, be " 1 " if judge subframe numbering (ID), then enter ST23, week is numbered decipher.
Then, enter ST24, judge whether to obtain all numberings.In ST22, not 1 o'clock and in ST24, can not obtain when numbering week in the subframe that receives, enter ST25.
In ST25, operation result and the 1st embodiment are same, register as the signal operation result data 46 of Figure 17.That is, same with the 1st embodiment, as shown in Figure 9, this operation result comprises the beginning timing data a2 of transmission time β, subframe etc. (receiver side is b2 etc.) and the moment data (Z counting) of the beginning part of next subframe of the subframe that receives.
In addition, in the present embodiment, in addition, the subframe numbering (ID) that receives is registered as the subframe ID data 141 of Figure 17.
And, in the moment of the timer 29 the when computing of gps signal finishes, register as signal operation result data 46.
Then, in ST26, the target-subframe of Figure 16 obtains program 132 actions, to regularly the moment of corresponding timer 29 is carried out computing with target-subframe.For example, when the subframe that target-subframe is subframe 1, receive is subframe 3, in the beginning part of the subframe of the expressions such as arrow a1 of Fig. 9, computing is partly carried out in the beginning of subframe 1.When the subframe that receives was " 3 ", the Z counting that receives was the time of the beginning part of subframe 2.Thereby, as if being that benchmark is proofreaied and correct with transmission time β, then know the beginning part of the subframe 1 in the timer 29 with this time affix time after 18 seconds.
Thereby, by receiving gps signal in the timing of the beginning part of subframe 1, can receive the signal of subframe 1 according to timer 29, can obtain week numbering data.
Thereby among ST27 and the ST28, the time correction data operation program 37 of Figure 16 can not only also be proofreaied and correct RTC23 according to numbering in week according to the Z counting.Thereby, can correctly proofread and correct the date.
The signal operation operation program 36 of MPU17 and Figure 16 etc. becomes an example of subframe numbering obtaining section.In addition, in the present embodiment, shown in ST26, receive the target-subframe of satellite numbering according to the target-subframe number information.
Then, the corrected value that uses Figure 19 explanation to be used to obtain with UTC is the operation of UTC offset data (UTC supplemental characteristic).
In order to carry out time correction, except numbering, week also needs the UTC offset data.This data storage is at the UTC of Figure 17 offset data 142.
And this UTC offset data 142 needs termly, for example annual renewal for several times, sets the more new period.Figure 19 is a process flow diagram of carrying out this renewal.
At first, in the ST210 of Figure 19, judge whether to obtain period for the UTC skew.Specifically, obtaining the period determining program by the UTC skew of Figure 16 133 judges.
Then, judgement is UTC skew when obtaining period, receives computing regularly at ST211.
Specifically, the target-subframe of Figure 16 obtains program 132 action, as the ST26 of Figure 18, calculates and obtains pages 18 the differential time that the subframe that receives and target-subframe are frame 4.
Then, judge whether to receiving regularly at ST212.Receiving under the situation regularly, receive gps signal, when ST213 can obtain the UTC offset data, upgrade the UTC offset data 142 of Figure 17 at ST214.
Like this, by upgrading UTC offset data 142 termly, when the time correction of band GPS wrist-watch 200, can proofread and correct deviation more accurately with UTC.
(the 4th embodiment)
Figure 20 and Figure 21 are the schematic block diagram of primary structure of the band GPS wrist-watch 300 (with reference to Fig. 1) of expression the 4th embodiment of the present invention.Figure 22 is the general flowchart of the band GPS wrist-watch 300 of present embodiment.
The structures of the band GPS wrist-watch 10 of the structure of the band GPS wrist-watch 300 of present embodiment etc. and above-mentioned the 1st embodiment and the band GPS wrist-watch 100 of the 2nd embodiment etc. are most of identical.Thereby identical structure adopts prosign and omits explanation, below, be that the center describes with the difference.In addition, these Figure 20, Figure 21, Figure 22 be based on the band GPS wrist-watch 10 of the 1st embodiment, but also can be applicable to the band GPS wrist-watch 100 of the 2nd embodiment.
In the present embodiment, after once storing in advance and receive, band GPS wrist-watch 300 obtains the data of relevant gps satellite 15, the reference data when catching gps satellite 15 as next time.
Specifically, according to the Doppler frequency of the gps satellite 15 that receives, C/A code phases, signal intensity etc., generate satellite data.
That is, the deviation of instrumentation Doppler frequency, this is worth more near " 0 ", and satellite is offside in zenith, and it is easy more to receive.Thereby band GPS wrist-watch 300 is with the registration of getting up of the moment data association of the deviation data of this Doppler frequency and the gps signal that receives gps satellite 15.Thereby, know the gps satellite 15 that receives easily according to constantly.
Such satellite data is registered to the satellite data 241 of Figure 21.Specifically, satellite data 241 is recorded in the general RAM18 of Fig. 2.
In addition, can understand the satellite numbering of gps satellite 15, therefore, the data of the deviation of above-mentioned Doppler frequency are numbered with satellite associate from the phase place of C/A code.Thereby, can determine the satellite numbering of the gps satellite 15 of reception easily.
In addition, the data of signal intensity also associate with the data of the deviation of above-mentioned Doppler frequency and satellite numbering etc.Thereby, can screen the gps satellite 15 of the higher easy reception of reliability.
That is, registration has the interrelated data of deviation/signal intensity that make the moment/satellite numbering/Doppler frequency in the satellite data 241 of Figure 21.This satellite data 241 becomes an example of catching the satellite information storage part.
Use the collection of the such satellite data 241 of the flowchart text of Figure 22 and utilize method.Being collected among the ST33 of satellite data 241 carried out.
Specifically, satellite data 241 is write down in satellite data logging program 231 actions of Figure 20 as described above.
Then, in ST31 and ST32, utilize satellite data 241.That is, in ST31, satellite data is deposited not determining program 232 actions, judges whether to exist available satellite data 241.
When in ST31, having available satellite data 241, in ST32, utilize this satellite data 241 to catch satellites fast.
That is, in satellite data 241, record this moment near zenith, satellite numbering that signal intensity is strong.Thereby, by utilizing this data search gps satellite 15, can catch gps satellite rapidly, therefore can suppress consumed power than the lowland.
(the 5th embodiment)
Figure 23 is the general flowchart of the band GPS wrist-watch of expression the 5th embodiment of the present invention.
The structures of the band GPS wrist-watch of present embodiment etc. are identical with the major parts such as structure of the band GPS wrist-watch 300 of above-mentioned the 4th embodiment.Thereby identical structure adopts prosign and omits explanation, below, be that the center describes with the difference.
In the band GPS wrist-watch of present embodiment, the process flow diagram with respect to the 4th embodiment of Figure 22 as shown in figure 23, has added the process flow diagram of the satellite data 241 that only obtains gps satellite 15.That is, in the process flow diagram of this Figure 23, do not obtain the Z counting, up hill and dale only to obtain satellite data 241 termly as purpose from gps signal.
Thereby the time of reception of the gps signal of gps satellite 15 becomes C/A code length (1 millisecond) or message 1 bit length (20 milliseconds).
Specifically, in the ST42 of Figure 23, for example, only during being 20 milliseconds, above-mentioned message 1 bit length receives the gps signal of gps satellite 15.
Like this, in the operation of Figure 23, do not obtain above-mentioned Z counting, in order to carry out satellite acquisition in the future rapidly, only with the satellite data 241 that obtains the 4th embodiment as purpose.Thereby, can be fast and obtain satellite data 241 effectively.
(the 6th embodiment)
Figure 24 is the general flowchart of the band GPS wrist-watch of expression the 6th embodiment of the present invention.
The structures of the band GPS wrist-watch of present embodiment etc. are identical with the major parts such as structure of the band GPS wrist-watch of the respective embodiments described above.Thereby identical structure adopts prosign and omits explanation, below, be that the center describes with the difference.
In the present embodiment, be different from the respective embodiments described above, band GPS wrist-watch once receives gps signals from gps satellite 15, obtain Z counting (time information) after, in order to confirm the precision of this Z counting, receive gps signals from same gps satellite 15 once more, obtain the Z counting.
Then, by comparing the value of these 2 Z countings, judge its matching.When having matching, carry out the time correction of RTC23.
Specifically, in the ST51 of Figure 24, judge whether to exist last time satellite data.Not last time during satellite data, ST52 once more seizure obtained the same gps satellite 15 of this correlations, obtain gps signal, and obtain the Z counting.
Then, in ST53, matching is judged in not shown matching determining program action.Thereby, when the Z counting of obtaining by initial reception being carried out computing, can grasp this mistake fast according to signal because of generations such as noise mistake.Thereby the time correction precision significantly improves.
In addition, above-mentioned matching determining program becomes an example of matching judging part.
(the 7th embodiment)
Figure 25 is the general flowchart of the band GPS wrist-watch of expression the 7th embodiment of the present invention.
The structures of the band GPS wrist-watch of present embodiment etc. are identical with the major parts such as structure of the band GPS wrist-watch of above-mentioned the 6th embodiment.Thereby identical structure adopts prosign and omits explanation, below, be that the center describes with the difference.
In the present embodiment, be different from above-mentioned the 6th embodiment, band GPS wrist-watch receives gps signal from a plurality of different gps satellites 15, obtains a plurality of Z countings (time information).Then, for the precision that a plurality of Z that confirm to obtain count,, judge its matching by comparing these Z countings value separately.Then, when having matching, carry out the time correction of RTC23.
Specifically, in the ST61 of Figure 25, judge whether the gps signal of different a plurality of gps satellites 15 is stored in BB RAM22.Be stored in BB when using RAM22, in ST62, judge whether and to obtain matching at these Z countings.
That is, not shown different satellite data matching judgment program behaviors are judged the matching that these Z count.When having matching, carry out the time correction of RTC23.Like this, in the present embodiment, the matching that the Z that judgement obtains from different gps satellite 15 counts.Thereby available more high-precision Z counting carries out time correction.
This difference satellite data matching determining program becomes an example of different satellite matching judging parts.
The invention is not restricted to above-mentioned embodiment.In the above-mentioned embodiment,, be that example is illustrated to center on geocyclic gps satellite as the positional information satellite.But positional information satellite of the present invention is not limited thereto, and also comprises stationary satellite and accurate zenith satellite etc.

Claims (14)

1. a time correction device is characterized in that, this time correction device has:
Acceptance division, it receives from the next satellite-signal of positional information satellite transmission;
The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least;
Timing portion, it has self time information; And
The time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information,
Above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action.
2. time correction device according to claim 1 is characterized in that,
Above-mentioned acceptance division has:
Frequency processing portion, its frequency to the above-mentioned satellite-signal that receives is carried out conversion process; And
Demodulation process portion, it is to carrying out demodulation process by the above-mentioned satellite-signal after the said frequencies handling part conversion process,
Said frequencies handling part, above-mentioned demodulation process portion or above-mentioned satellite-signal operational part be action selectively respectively.
3. according to claim 1 or the described time correction device of claim 2, it is characterized in that,
This time correction device has the satellite-signal storage part of the above-mentioned satellite-signal that receives of the above-mentioned acceptance division of storage.
4. according to any described time correction device of claim 1 to 3, it is characterized in that,
It is that action correlation time of acceptance division clocking information and/or above-mentioned satellite-signal operational part is the counter portion of satellite-signal computing clocking information correlation time that this time correction device has the action that obtains above-mentioned acceptance division,
Above-mentioned time information correction unit is according to the correction timing information that calculates based on above-mentioned acceptance division clocking information and/or above-mentioned satellite-signal computing clocking information, proofreaies and correct above-mentioned self time information.
5. according to any described time correction device of claim 1 to 4, it is characterized in that,
The time to go that comprises the satellite-signal of above-mentioned positional information satellite in the above-mentioned satellite-signal is a propagation delay time information.
6. according to claim 4 or 5 described time correction devices, it is characterized in that,
Comprising the time that above-mentioned acceptance division receives the above-mentioned satellite-signal of above-mentioned positional information satellite in the above-mentioned acceptance division clocking information is the satellite-signal receiving time information,
Above-mentioned satellite-signal receiving time information becomes the necessary minimal temporal information that is used to obtain above-mentioned satellite time information and above-mentioned correction timing information.
7. according to any described time correction device of claim 4 to 6, it is characterized in that,
Above-mentioned counter portion moves according to high precision oscillator.
8. according to any described time correction device of claim 1 to 7, it is characterized in that,
Comprise the subframe number information in the above-mentioned satellite-signal,
Described time correction device has subframe numbering obtaining section, this subframe numbering obtaining section obtains from above-mentioned subframe number information and comprises GPS all number information and/or UTC (universaltime coordinate constantly, world concordant time) the target-subframe number information of parameter information
Described time correction device receives the target-subframe of above-mentioned satellite-signal according to above-mentioned target-subframe number information.
9. according to any described time correction device of claim 1 to 8, it is characterized in that,
The satellite number information, Doppler frequency information and the C/A code phases information that comprise above-mentioned positional information satellite in the above-mentioned satellite-signal,
Described time correction device has the satellite information of seizure storage part, the satellite number information of the above-mentioned positional information satellite that this seizure satellite information storage portion stores receives, Doppler frequency information and C/A code phases information.
10. according to any described time correction device of claim 6 to 8, it is characterized in that,
Above-mentioned satellite-signal receiving time information is C/A code length or message 1 bit length.
11. any described time correction device according to claim 1 to 10 is characterized in that,
Described time correction device repeatedly receives above-mentioned satellite-signal from same above-mentioned positional information satellite,
Described time correction device has the matching judging part, and this matching judgement section judges is by the above-mentioned matching that repeatedly receives a plurality of above-mentioned satellite time information of obtaining.
12. any described time correction device according to claim 1 to 10 is characterized in that,
Described time correction device receives above-mentioned satellite-signal from a plurality of above-mentioned positional information satellites,
Described time correction device has different satellite matching judging parts, the matching of a plurality of time informations that this difference satellite matching judgement section judges obtains from above-mentioned a plurality of above-mentioned positional information satellites.
13. the time set with the time correction device is characterized in that, this time set has:
Acceptance division, it receives from the next satellite-signal of positional information satellite transmission;
The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least;
Timing portion, it has self time information; And
The time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information,
Above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action.
14. the time adjustment method of a time correction device, described time correction device has:
Acceptance division, it receives from the next satellite-signal of positional information satellite transmission;
The satellite-signal operational part, it carries out computing to the above-mentioned satellite-signal that is received by above-mentioned acceptance division, obtains the satellite time information at least;
Timing portion, it has self time information; And
The time information correction unit, it proofreaies and correct above-mentioned self time information according to above-mentioned satellite time information,
It is characterized in that,
Above-mentioned acceptance division and above-mentioned satellite-signal operational part are selected ground action,
Above-mentioned satellite-signal according to above-mentioned acceptance division receives carries out computing by above-mentioned satellite-signal operational part then.
CNA2008101376651A 2007-07-09 2008-07-08 Time adjustment device, timekeeping device with a time adjustment device, and a time adjustment method Pending CN101344760A (en)

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CN103592843A (en) * 2013-11-07 2014-02-19 中国电子科技集团公司第四十一研究所 Timestamp circuit and implement method
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CN104199277A (en) * 2014-08-07 2014-12-10 王小凡 Electronic clock correcting method based on audio transmission
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